JP5691451B2 - Rotor for rotating electrical machines - Google Patents

Description

  The present invention relates to a rotor for a rotating electrical machine that includes a laminate formed by laminating a plurality of steel plates and is fixed to the outer peripheral side of a rotating shaft.

  2. Description of the Related Art Conventionally known rotating electrical machines such as vehicle electric motors include a stator and a rotor. It is also considered that the rotor is configured so as to include a laminate formed by laminating a plurality of steel plates. For example, the rotor may be a rotor with magnets in which permanent magnets are arranged at a plurality of locations in the circumferential direction of the laminate.

  For example, in the electric motor described in Patent Document 1, a rotor is disposed opposite to the inner side in the radial direction of the stator, and the rotor is formed by laminating a core sheet obtained by punching a peripheral groove, a shaft hole, and the like by an automatic lamination method. The permanent magnet is embedded in the hole of the core of the rotor by the IPM method. In addition, a lid corresponding to the end plate is disposed on both end sides of the laminated cores, and a plurality of rivets are passed therethrough.

  Moreover, in the laminated iron core which laminated | stacked the several steel plate described in patent document 2, while forming the slot which accommodates a coil in an inner peripheral side, a plurality of steel plates, the steel plate which provided the notch groove in the outer peripheral part The tongue piece is arranged at a position corresponding to the notch groove on the two steel plates A which are formed by A and the steel plate B provided with the tongue piece bent into a V shape on the outer peripheral portion and stacked with the notch grooves being matched. It is said that one steel plate B is stacked and repeated. In addition, after stacking in this way, the tongue piece is bent while extending the V shape into a flat plate shape in the cutout groove, and is joined by a fastening margin between the groove width of the cutout groove and the width of the tongue piece, and integrated lamination It is said that an iron core can be obtained.

Japanese Patent Application Laid-Open No. 2002-136011 JP-A-57-82845

  In the rotor described in Patent Document 1, a laminated body is configured by laminating core sheets, and the core is prevented from popping out by passing a plurality of rivets through the laminated body. However, when multiple rivets are used in this way, if the material of the rivet is not devised, the magnetic flux passing through the inside of the core can be obstructed and the output performance of the rotating electrical machine can be reduced, or the efficiency of the rotating electrical machine can be reduced. There is sex. In addition, the need for a plurality of rivets increases the number of component parts of the rotor. On the other hand, it is also conceivable to prevent the end portions of the rotor core from being opened by the end plate without using rivets. In this case, however, an end plate having a large diameter and high rigidity is required.

  On the other hand, in a rotor having a laminate of steel plates, when the rivet is omitted, the end plate is made smaller in diameter than the rotor core, or the end plate is less rigid, the steel plate at the axial end of the rotor There is a possibility that the outer peripheral end portion is displaced so as to open outward in the axial direction with respect to other rotor core portions. For example, when a permanent magnet is disposed on the rotor core, the outer peripheral end of the steel plate at the end is displaced outward by the magnetic attractive force acting between the end of the permanent magnet and the end of the rotor core. there is a possibility. Further, when the axial length of the stator core facing the rotor is longer than the axial length of the rotor, the outer peripheral edge of the steel plate at the end is also caused by the magnetic attractive force acting between the stator and the rotor when the rotating electrical machine is used. There is also a possibility that the part is displaced away from the outside. Moreover, although it is possible to prevent said displacement by joining each steel plate of a rotor by welding, there exists a possibility of causing an excessive increase in manufacturing cost.

  When the outer peripheral end of the steel plate at the axial end of the rotor core is displaced away from the outside in this way, the rotor core is less resistant to the magnetic force or centrifugal force acting on the permanent magnet during rotation. It cannot be said that there is no possibility of inconvenience such as breakage. In particular, in order to improve the efficiency of the rotating electrical machine, it is conceivable to reduce the thickness of the steel plate constituting the rotor core or to reduce the interval between the magnet core insertion hole of the rotor core and the outer peripheral surface of the rotor core. The proof stress of the rotor core tends to be low. In addition, when the outer peripheral end of the steel plate at the axial end of the rotor core is displaced so as to be separated outward, there is a possibility that the magnetization efficiency in the rotor core is lowered.

  Further, the laminated iron core described in Patent Document 2 is considered to have a stator structure, and it is difficult to use this structure as a rotor. In addition, the laminated iron core has a slot for accommodating the coil on the inner peripheral side which is the rotor facing side, and the steel plate at the end is displaced on the inner peripheral side so as to be separated outward in the axial direction. There is little need to provide a means to block. That is, when the coil is wound around the laminated iron core on the inner peripheral side, a plurality of steel plates constituting the laminated iron core are coupled by the coil. Such a patent document 2 does not disclose a rotor that can reduce the number of components, increase the strength, and increase the output and efficiency of the rotating electrical machine.

  An object of the present invention is to reduce the number of parts, increase the strength, and increase the output and efficiency of a rotating electrical machine in a rotor for a rotating electrical machine.

A rotor for a rotating electrical machine according to the present invention includes a laminated body formed by laminating a plurality of steel plates, and is a rotor for a rotating electrical machine fixed to the outer peripheral side of a rotating shaft. Including at least one end-side end steel plate provided at one end in the axial direction, and a steel plate with a locking portion provided on the center side in the axial direction from the one end-side end steel plate and having a locking portion on the outer peripheral portion; The locking portion is formed by bending a protruding portion provided on the outer peripheral surface of the steel plate with the locking portion so as to protrude to the outer diameter side outward in the axial direction, and further at the distal end portion of the bent portion than the one end side steel plate. A rotation characterized in that a portion protruding outward in the axial direction is formed by bending to the inner diameter side, and the tip of the locking portion is pressed against the steel plate with the locking portion by the one end side steel plate. This is an electric rotor.

According to the rotor for a rotating electrical machine according to the present invention, since the one end side steel plate can be pressed by the locking portion of the steel plate with the locking portion, the magnetic attraction in the axial direction between the stator and the rotor at the time of use. Even when a force acts, it is possible to prevent the outer peripheral end of the one end side end steel plate from being displaced away from the outside in the axial direction without using rivets or welding. For this reason, the output and efficiency of the rotating electrical machine including the rotor can be effectively increased.

In the rotor for a rotating electrical machine according to the present invention, preferably, the laminate is provided on the outer peripheral surface of the one end side steel plate disposed on the outer side in the axial direction than the steel plate with the locking portion, and the steel plate with the locking portion. It includes a recess into which a locking portion provided in the is inserted.

  According to the above configuration, the locking portion can be prevented from projecting more radially outward than the outer peripheral surface of each steel plate, and the radial gap between the rotor and the stator can be effectively reduced. The output can be improved more effectively.

  In the rotor for a rotating electrical machine according to the present invention, preferably, the laminated body includes permanent magnets provided so as to be inserted at a plurality of locations in the circumferential direction.

  According to the above configuration, although the outer peripheral side of the end steel plate provided at the axial end of the laminate is easily displaced so as to be separated outward in the axial direction by the magnetic force of the permanent magnet, the displacement is effectively Since it can prevent, the intensity | strength of the outer peripheral part of the axial direction edge part of a laminated body can be fully made high. For this reason, the magnetization efficiency with respect to the laminated body can be increased, and the stress on the laminated body can be relieved regardless of the magnetic attractive force acting between the rotor and the stator during use or the centrifugal force acting on the permanent magnet.

  According to the rotor for a rotating electrical machine according to the present invention, the number of parts can be reduced, the strength can be increased, and the output and efficiency of the rotating electrical machine can be increased.

It is a schematic sectional drawing which shows partially the rotary electric machine containing the rotor for rotary electric machines of one example of embodiment which concerns on this invention. FIG. 2 is a view of an upper half portion obtained by taking out only the rotor from FIG. 1 and viewing from one axial side to the other side in FIG. 1. FIG. 2 is a diagram of a ¼ portion in the circumferential direction taken out from FIG. 1 from the central steel plate constituting the central portion of the rotor core and viewed from one axial side to the other side in FIG. 1. It is the figure of the 1/4 part of the circumferential direction seen from the axial direction one side of FIG. 1 to the other side which shows the state before taking out the steel plate with a latching part which comprises a rotor core from FIG. 1, and bending a protrusion. FIG. 2 is a view of a circumferential ¼ portion taken out from FIG. 1 from an end steel plate that constitutes an end of a rotor core and viewed from one axial side to the other side in FIG. 1. It is a figure corresponding to FIG. 2 which shows the state before laminating | stacking each steel plate which comprises a rotor core, and bending the protrusion of a steel plate with a latching | locking part. It is a schematic sectional drawing which shows partially the rotary electric machine containing the rotor for rotary electric machines of the comparative example different from this invention. It is a schematic sectional drawing which shows partially the rotary electric machine containing the rotor for rotary electric machines of another example of embodiment which concerns on this invention.

  Hereinafter, an example of an embodiment according to the present invention will be described with reference to FIGS. A rotating electrical machine including a rotor for a rotating electrical machine (hereinafter simply referred to as “rotor”) according to the present embodiment functions as, for example, a motor for driving a hybrid vehicle, a generator for generating power, or both. It is used as having As shown in FIG. 1, the rotating electrical machine 10 is a synchronous motor driven by, for example, a three-phase alternating current, and is opposed to a stator 14 fixed to the inner surface of a motor case (not shown) that is a housing, and radially inward of the stator 14. The rotor 16 arranged and a rotating shaft 18 to which the rotor 16 is fixed are provided. In addition, the kind of rotary electric machine 10 is not limited to a synchronous motor.

  The stator 14 is wound by concentrated winding or distributed winding on a stator core 20 configured by laminating a plurality of steel plates such as electromagnetic steel plates in the axial direction and teeth provided at a plurality of locations in the circumferential direction of the inner peripheral surface of the stator core 20. And a three-phase stator coil 22. In the stator coil 22, a pair of coil ends is configured by portions protruding outward from both axial side surfaces of the stator core 20. The stator core 20 is fixed inside the motor case.

  The rotating shaft 18 is rotatably supported by a motor case by a bearing (not shown). The rotor 16 is fixed to the outer diameter side of the intermediate portion in the axial direction of the rotating shaft 18, and is disposed opposite to the inner side in the radial direction of the stator 14 via an air gap 24.

  The rotor 16 includes a rotor core 26 that is a laminate formed by laminating steel plates such as a plurality of electromagnetic steel plates in the axial direction, and permanent magnets 28 that are provided so as to be inserted into a plurality of locations in the circumferential direction of the rotor core 26. Including. That is, the permanent magnet 28 is embedded in the rotor core 26 by the IPM method. The permanent magnet 28 is magnetized in a direction inclined with respect to the radial direction of the rotor 16. That is, as shown in FIG. 2, two permanent magnets 28 are set as one set, and a plurality of sets of permanent magnets 28 are inserted into magnet holes 30 provided so as to penetrate through a plurality of circumferentially equal intervals of the rotor core 26. Yes. In this state, the permanent magnets 28 of each set are arranged in a shape in which the distance between them increases toward the outer side in the radial direction. In addition, the magnetizing direction in the radial direction of the permanent magnet 28 is the same in each set, and the magnetizing directions in the radial direction are different between different sets of adjacent permanent magnets 28. Note that the present embodiment is not limited to such an arrangement configuration of the permanent magnets 28, and a configuration in which a plurality of permanent magnets 28 are arranged in the radial direction of the rotor 16 so as to be magnetized in the radial direction is also possible. Can be adopted.

  Returning to FIG. 1, the rotor core 26 that is a laminated body includes two end steel plates 32 a and 32 b having the same shape, and two end steel plates 32 a at both axial ends. A total of two steel plates 34 with the same locking part, one each provided closer to the center in the axial direction than the set 32b, and a plurality of same shapes sandwiched from both sides by each steel plate 34 with the locking parts And a central steel plate 36. The end steel plates 32a and 32b are provided at two ends in the axial direction of the rotor core 26, and a total of two end steel plates 32a and 1b on the outer side (the outer side means both axial ends of the rotor core 26). Each has a total of two inner end steel plates 32b (the inner side refers to the axially central side of the rotor core 26).

  Locking portions 38 bent in a substantially L-shaped cross section are provided at a plurality of locations on the outer peripheral portion of each steel plate 34 with a locking portion. Moreover, the recessed part 40 is formed in the axial direction full length in several places corresponding to the latching | locking part 38 of each steel plate 34 with each latching | locking part in the outer peripheral surface of each edge part steel plate 32a, 32b. In the recess 40, the locking portions 38 of the respective steel plates 34 with locking portions are inserted. Thus, the rotor core 26 is provided on the outer peripheral surface of the end steel plates 32a and 32b arranged on the outer side in the axial direction than the steel plate 34 with the locking portion, and the locking portion 38 provided on the steel plate 34 with the locking portion. Includes a recess 40 into which is inserted. Each end steel plate 32a, 32b has the same shape.

  The locking portion 38 is formed by bending the protrusions 42 (FIG. 4) provided at a plurality of locations in the circumferential direction of the outer peripheral surface of the steel plate 34 with the locking portion outward in the axial direction, and at the end of the bent portion, the end steel plate. A portion protruding outward in the axial direction from 32a and 32b is formed by bending inward in the radial direction. The front ends of the respective locking portions 38 are axially central, i.e., on the side of the steel plate 34 with a locking portion, at the outer peripheral end portions of the outer side surfaces of the two end steel plates 32a, one at each end in the axial direction of the rotor core 26. It is pressed down.

  In order to configure the rotor 16 as described above, the steel plates 32a, 32b, 34, and 36 constituting the rotor core 26 are configured as shown in FIGS. FIG. 3 is a view showing a part of the central steel plate 36 constituting the central portion of the rotor core 26, and FIG. 4 is a state before the protrusion 42 is bent in the steel plate 34 with a locking portion constituting the rotor core 26. FIG. 5 is a view showing a part of the end steel plates 32 a and 32 b constituting the end of the rotor core 26.

  Each of the steel plates 32a, 32b, 34, and 36 shown in FIG. 3 to FIG. 5 is a thin, substantially disk shape, and rectangular holes 44 constituting the magnet holes 30 (FIGS. 1 and 2) are formed at a plurality of locations in the circumferential direction. Yes. In addition, the central steel plate 36 shown in FIG. 3 has a circular cross-sectional shape on the outer peripheral surface. On the other hand, the steel plate 34 with a locking part shown in FIG. 4 has protrusions 42 that protrude radially outward at a plurality of circumferentially equal intervals on the outer peripheral surface. Further, in the illustrated example, when the rotor 16 (FIG. 1) is configured on the outer peripheral surface of the steel plate 34 with the engaging portion, different sets of permanent magnets 28 adjacent to each other in the center between adjacent magnetic poles, that is, in the circumferential direction of the rotor 16. A protrusion 42 is provided at the center between the two. However, when the rotor 16 is configured by the outer peripheral surface of the steel plate 34 with the locking portion, the protrusion 42 is located between the two permanent magnets 28 in each group in the circumferential center of each magnetic pole, that is, in the circumferential direction of the rotor 16. It can also be provided in the center.

  Moreover, the recessed part 40 is formed in the outer peripheral surface of the edge part steel plates 32a and 32b shown in FIG. 5 in the axial direction full length in several places of the circumferential direction equal interval corresponding to the protrusion 42 (FIG. 4). In addition, although the recessed part 40 is made into the rectangular cross section in the example of illustration, it can also be set as various shapes other than that. Further, a central hole for fitting the rotating shaft 18 (FIG. 1) is formed at the center of each of the steel plates 32a, 32b, 34, 36.

  Then, as shown in FIG. 6, the steel plates 32 a, 32 b, 34, and 36 are stacked so that the rectangular holes 44 are aligned with each other and the protrusions 42 and the recesses 40 are aligned with each other. In this state, as shown in FIG. 1, each protrusion 42 is bent at a substantially right angle outward in the axial direction, the bent portion is inserted into the recess 40 of the end steel plates 32a and 32b, and the bent portion of each protrusion 42 is inserted. A locking portion 38, which is a caulking portion, is provided by bending the distal end portion of the inner portion inward in the radial direction. Further, the outer peripheral portions of the outer side surfaces of the end steel plates 32a at both ends of the rotor core 26 are pressed by the front ends of the locking portions 38 so as to be in close contact with the steel plates 34 with locking portions. In this state, the diameter of the circumscribed circle of each locking portion 38 is made substantially the same as the outer diameter of the central steel plate 36 and the end steel plates 32a, 32b. Therefore, the circumferential length W1 (FIG. 5) of the recess 40 is set to be equal to or greater than the circumferential length W2 (FIG. 4) of the protrusion 42, and the radial length of the recess 40, that is, the depth D1 (FIG. 5) is The thickness of the protrusion 42 is greater than the thickness.

  According to such a rotating electrical machine 10, a three-phase alternating current is supplied to each of the stator coils 22 of each phase when used, thereby generating a rotating magnetic field in the stator 14 and being permanently affected by the influence of the rotating magnetic field. The rotor 16 with the magnet 28 rotates. According to such a rotor 16, the end steel plate 32 a can be pressed by the locking portion 38 constituted by the protrusion 42 of the steel plate 34 with locking portion. Therefore, even when an axial magnetic attractive force acts between the stator 14 and the rotor 16 during use, the end steel plate 32a provided at the axial end of the rotor 16 without using rivets or welding. It can prevent that the outer peripheral edge part of this moves in the direction which leaves | separates to an axial direction outer side. For this reason, the output and efficiency of the rotating electrical machine 10 including the rotor 16 can be effectively increased. As a result, the number of parts can be reduced, the strength can be increased, and the output and efficiency of the rotating electrical machine 10 can be increased.

  The rotor core 26 is provided on the outer peripheral surface of the end steel plates 32a and 32b disposed on the outer side in the axial direction than the steel plate 34 with the locking portion, and the locking portion 38 provided on the steel plate 34 with the locking portion is inserted. A recessed portion 40 is included. For this reason, it is prevented that the latching | locking part 38 protrudes largely on the radial direction outer side rather than the outer peripheral surface of each steel plate 32a, 32b, 34, 36, and is a radial gap between the rotor 16 and the stator 14. The air gap 24 can be effectively reduced, and the output of the rotating electrical machine 10 can be improved more effectively.

  The rotor core 26 includes permanent magnets 28 that are provided so as to be inserted at a plurality of locations in the circumferential direction. For this reason, although the outer peripheral side of the end steel plate 32a provided at the axial end of the rotor core 26 is easily displaced so as to be separated outward in the axial direction by the magnetic force of the permanent magnet 28, the displacement is effectively prevented. Therefore, the strength of the outer peripheral portion of the axial end portion of the rotor core 26 can be sufficiently increased. Therefore, the magnetizing efficiency for the rotor core 26 can be increased, and the stress on the rotor core 26 can be relieved regardless of the magnetic attractive force acting between the rotor 16 and the stator 14 or the centrifugal force acting on the permanent magnet 28 during use. it can. In the present embodiment, in order to prevent the rotor core 26 from opening outward in the axial direction, it is not necessary to use an end plate having a large diameter and high rigidity. For this reason, the output of the rotary electric machine 10 can be improved more effectively. In addition, the number of manufacturing steps can be reduced and the cost can be reduced.

  FIG. 7 shows a rotating electrical machine 10 including a rotor 16 of a comparative example different from the present invention. In this comparative example, all the steel plates 46 constituting the rotor core 26 provided in the rotor 16 have the same disk shape. Each steel plate 46 is not formed with a protruding portion or a locking portion protruding to the outer peripheral side. In such a comparative example, for example, as shown in the figure, when the axial length of the stator core 20 is larger than the axial length of the rotor core 26, the steel plates 46 at both ends in the axial direction of the rotor core 26 are used on the steel plates 46 at the ends in FIG. A magnetic attraction force in the α direction acts from the stator 14, and an axial component of the magnetic attraction force makes it easy to displace the outer peripheral portions of the steel plates 46 at both ends so as to open outward. Further, as shown by the arrow β direction or the arrow γ direction in FIG. 7, the magnetic attractive force acting by the short-circuit magnetic flux between the outer peripheral portion of the steel plate 46 at both ends and the permanent magnet 28 causes the steel plate 46 at the axial end portion to move. There is also a possibility that the outer peripheral portion is displaced so as to open outward. In such a comparative example, there is a possibility that the magnetizing efficiency of the rotor core 26 is lowered or the strength of the outer peripheral portion of the rotor core 26 cannot be sufficiently secured. On the other hand, in the present embodiment, the locking portion 38 (FIG. 1) configured by bending the protrusion as described above effectively prevents the outer peripheral portion of the rotor core 26 from opening in the axial direction. Such inconvenience does not occur.

  In the present embodiment, the two steel plates 32a and 32b are disposed on both sides in the axial direction from the steel plate 34 with the locking portion, but are arranged on both sides in the axial direction from the steel plate 34 with the locking portion. The number of steel plates to be arranged can be one by one, or three or more. Moreover, the number of the latching | locking parts 38 provided in the steel plate 34 with a latching part, and the number of the recessed parts 40 provided in the edge part steel plates 32a and 32b are not specifically limited.

  Next, FIG. 8 shows another example of the embodiment according to the present invention. FIG. 8 is a schematic cross-sectional view partially showing a rotating electrical machine 10 including another example of the rotor 16. In the rotor 16 of another example, unlike the configuration shown in FIGS. 1 to 6, the ends of the magnetic material or nonmagnetic material having a smaller diameter than the respective steel plates 32a, 32b, 34, 36 are provided at both axial ends of the rotor core 26. A plate 48 is disposed, and the end plate 48 sandwiches the rotor core 26 from both sides. The outer peripheral surface of the end plate 48 is separated from the front end of the locking portion 38 of the steel plate 34 with the locking portion. As described above, in the present invention, the end plate 48 can be provided, but it is possible to obtain an effect that it is not necessary to use a large-diameter configuration or a highly rigid configuration as the end plate 48. Other configurations and operations are the same as those of the embodiment shown in FIG. 1 to FIG.

  Further, in each of the above embodiments, the case where the permanent magnet 28 is provided on the rotor 16 has been described. However, the present invention is not limited to such a configuration, and is applicable to a configuration in which the permanent magnet is omitted from the rotor. Is possible. For example, the rotor may be a reluctance type in which the rotating electric machine is rotated using a reluctance torque with a non-circular cross-sectional shape provided with a plurality of axially long protrusions at a plurality of locations on the outer peripheral surface of the laminate. The present invention is effective because even in such a configuration, it is possible to effectively prevent the axial end of the rotor from being displaced outward in the axial direction by the magnetic attraction force during use.

  Furthermore, although each said embodiment demonstrated the case where the recessed part 40 which inserts the latching | locking part 38 of the steel plate 34 with a latching | locking part was formed in the outer peripheral surface of the edge part steel plates 32a and 32b, this invention is this It is not limited to such a configuration, and the cross-sectional shape of the outer peripheral surface of the end steel plate may be a simple circle. In this case, the locking portion 38 protrudes from the outer peripheral surface of each steel plate, but by adopting the configuration of the present invention, the number of parts can be reduced and the strength can be increased, and the output and efficiency of the rotating electrical machine can be increased. The effect that it can be increased is obtained.

  DESCRIPTION OF SYMBOLS 10 Rotating electrical machine, 14 Stator, 16 Rotor, 18 Rotating shaft, 20 Stator core, 22 Stator coil, 24 Air gap, 26 Rotor core, 28 Permanent magnet, 30 Magnet hole, 32a, 32b End steel plate, 34 Steel plate with a locking part, 36 center-side steel plate, 38 locking portion, 40 recess, 42 protrusion, 44 rectangular hole, 46 steel plate, 48 end plate.

Claims (4)

Including a laminate constituted by laminating a plurality of steel plates,
A rotor for a rotating electrical machine fixed to the outer peripheral side of a rotating shaft,
The laminate is
At least one end-side end steel plate provided at one axial end of the laminate;
A steel plate with a locking portion provided on the axial direction center side than the one end side steel plate, and having a locking portion on the outer peripheral portion;
The locking portion is formed by bending a protruding portion provided on the outer peripheral surface of the steel plate with the locking portion so as to protrude to the outer diameter side outward in the axial direction, and further at the distal end portion of the bent portion than the one end side steel plate. It is configured by bending the part protruding outward in the axial direction to the inner diameter side ,
A rotor for a rotating electrical machine, characterized in that the front end portion of the locking portion is pressed against the steel plate side with the locking portion by the one end side steel plate. The rotor for a rotating electrical machine according to claim 1,
The laminate is
It is provided on the outer peripheral surface of the one end side steel plate disposed on the outer side in the axial direction than the steel plate with the locking portion, and includes a recess into which the locking portion provided on the steel plate with the locking portion is inserted. A rotor for a rotating electrical machine. The rotor for a rotating electrical machine according to claim 1 or 2,
The laminated body includes a permanent magnet provided so as to be inserted at a plurality of locations in the circumferential direction. The rotor for a rotating electrical machine according to any one of claims 1 to 3,
At least one other end side steel plate provided at the other axial end of the laminate;
A steel plate with a second locking portion provided on the center side in the axial direction from one end-side steel plate on the other end, and having a second locking portion on the outer peripheral portion;
The second locking portion has a second protrusion provided on the outer peripheral surface of the steel plate with the second locking portion so as to protrude to the outer diameter side, and is axially outside on the opposite side of the protrusion of the steel plate with the locking portion. Is further formed by bending a portion protruding outward in the axial direction from the other end side steel plate at the tip end of the bent portion to the inner diameter side,
A rotor for a rotating electrical machine, wherein the tip end portion of the second locking portion is pressed against the steel plate side with the second locking portion on the other end side steel plate.

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