JP2009060738A - Rotating electrical machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electrical machine having a shaft being coupled with a rotor core formed by laminating split core plates, in which the rotor core and the shaft can be fixed much more certainly while reducing the number of components and the cost. <P>SOLUTION: The rotor 10 of a rotating electrical machine includes a rotor core 12 formed by laminating a plurality of split core plates 20 while arranging in the shape of a ring, a shaft 14 fitted in the rotor core 12, and a magnet 18 inserted into a magnet hole 16 formed in the split core plates 20, wherein a plurality of protrusions 24a and 24b are provided on the inner circumferential side of the split core plates 20 while displacing the centerline from the magnet hole 16 in the diameter direction, the side end portions 28 of the protrusions 24a and 24b are laminated alternately and unevenly along the axial direction of the rotor core 12, and the side end portions 28 of respective split core plates 20 laminated alternately and unevenly are fitted to the shaft 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a ring core formed by stacking a plurality of divided core plates in a ring shape, a shaft fitted into the ring core, and a magnet inserted into a magnet insertion hole formed in the divided core plate. And a rotary electric machine.

  For example, a rotating electrical machine rotor is formed as a cylindrical rotor core by laminating ring-shaped steel plates, and a hole portion into which a shaft is fitted is provided at the center. For this reason, when the said ring-shaped steel plate is manufactured, the material of the center part is not utilized. Therefore, the material yield of the steel sheet is improved by using a divided core plate obtained by dividing the rotor core in the circumferential direction, and arranging and laminating a plurality of divided rotor cores in a ring shape.

  The present applicant has proposed a technique in which convex portions are provided on the inner peripheral side of the divided core plate, and the respective layers are coupled by inserting pins into positioning portions formed on the convex portions (Patent Document 1).

Japanese Patent Application No. 2006-318797

  By the way, in the above technique, the convex portions are aligned in the stacking direction in the rotor core in which the divided core plates are stacked. For this reason, when a dimensional error or the like occurs in each convex portion, etc., there is a possibility that loosening, rattling, galling, or the like may occur when the shaft is inserted into the rotor core. In addition, pins are used for coupling the layers. However, in order to further reduce the cost and simplify the manufacturing process, it is desired to further reduce the number of parts and thereby reduce the cost.

  The present invention has been made in connection with the above-described conventional technology, and can more reliably fix the rotor core and the shaft on which the divided core plates are laminated, and reduce the number of parts and the cost. It aims at providing the rotary electric machine which can do.

  The rotating electrical machine according to the present invention includes a ring core formed by stacking a plurality of divided core plates in a ring shape, a shaft fitted into the ring core, and a magnet insertion hole formed in the divided core plate. A plurality of protrusions disposed on an inner peripheral side of the divided core plate with a center line position displaced in a diameter direction with respect to the magnet insertion hole The ring core is laminated such that the side end portions of the convex portions are alternately uneven along the axial direction of the ring core, and the side end portions of the divided core plates that are alternately unevenly laminated. Is fitted to the shaft.

  According to such a structure, the side edge part of the convex part provided in the inner peripheral side of the division | segmentation core plate which comprises a ring core makes the uneven | corrugated shape laminated | stacked alternately, and is fitted by the shaft. As a result, the side end portions alternately stacked are warped when the shaft is fitted and functions as a spring, so that the shaft and the ring core can be reliably fitted and fixed without loosening. Therefore, for example, even when a dimensional error or the like occurs in the split core plate, the ring core and the shaft can be securely fixed without causing looseness or rattling. In addition, since a pin or the like for connecting the layers is not necessary, the manufacturing cost can be reduced.

  In addition, at least two magnet insertion holes are formed at equal intervals in the divided core plate, and the convex portions are arranged corresponding to the magnet insertion holes, respectively, and at least one pair of adjacent convex portions. The one convex portion is arranged with the position of the center line in the diametrical direction displaced to one side with respect to the magnet insertion hole, and the other convex portion is the center line in the diametric direction with respect to the magnet insertion hole. The ring core is divided into positions where the position of the ring core is arranged in a ring shape, and is divided into angular units each of which is an integral multiple of the angular unit between the adjacent magnet insertion holes. If the magnets are stacked with the magnet insertion holes aligned in the axial direction of the ring core, the side end portions of the convex portions can be easily made uneven in the axial direction for stacking.

  In this case, the side end portion of the convex portion of the split core plate has a step shape, and includes a first step portion having a predetermined width dimension and a second step portion wider than the first step portion. For example, after one of the first step portion and the second step portion is stacked while being held by the ring core manufacturing apparatus, the other can be used when fitting to the shaft. Therefore, since the holding part of the convex part in the manufacturing apparatus and the holding part of the convex part in the shaft constituting the rotating electrical machine that is the product can be easily different, the shaft and the ring core are more securely fixed without rattling. can do.

  According to the present invention, the side end portions of the convex portions provided on the inner peripheral side of the split core plate that constitutes the ring core are fitted to the shaft in a concave-convex shape alternately stacked. As a result, the side end portions alternately stacked are warped when the shaft is fitted and functions as a spring, so that the shaft and the ring core can be reliably fitted and fixed without loosening. Therefore, for example, even when a dimensional error or the like occurs in the split core plate, the ring core and the shaft can be securely fixed without causing looseness or rattling. In addition, since a pin or the like for connecting the layers is not necessary, the manufacturing cost can be reduced.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a rotating electrical machine according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an exploded perspective view of a rotating electrical machine rotor 10 as a rotating electrical machine according to the first embodiment of the present invention. The rotating electrical machine rotor 10 according to the present embodiment constitutes an electric motor together with a stator (stator) not shown.

  The rotating electrical machine rotor 10 includes a rotor core (ring core) 12 in which thin fan-shaped divided core plates are arranged in a ring shape, a shaft (rotating shaft member) 14 disposed on the inner peripheral side of the rotor core 12, A magnet (magnet) 18 is formed in a rectangular magnet hole (magnet insertion hole) 16 that is formed at equal intervals in the circumferential direction of the rotor core 12 and penetrates each layer.

  The rotor core 12 has a predetermined number (for example, 50) of core plates 22 formed in a ring shape by disposing a predetermined number (three in this embodiment) of divided core plates (rotor core pieces) 20 made of a thin fan-shaped electromagnetic steel plate in the circumferential direction. Sheet) is constructed by stacking. Needless to say, the number of laminated rotor cores 12 can be appropriately changed according to the use conditions and the like.

  In the rotor core 12 configured by laminating a predetermined number of core plates 22 in this way, the predetermined two divided core plates 20 of the lowermost layer (first layer) core plate 22 in FIG. When the abutting position of the end portion is indicated by the arrow E1, the abutting position of the end portions of the predetermined two divided core plates 20 constituting the second layer core plate 22 which is the upper layer is indicated by the arrow E2. Indicated by Similarly, the third-layer core plate 22 is indicated by an arrow E3, the fourth-layer core plate 22 is indicated by an arrow E4, the fifth-layer core plate 22 is indicated by an arrow E1, and the same applies to the upper layer. Laminated in order. In this case, as understood from FIG. 1, the phases of the arrows E1 to E4 are shifted by 30 °. On the other hand, the contact position of the end in each layer, for example, the first layer, is the same as the angle of the arc of the single divided core plate 20, and a total of three locations in increments of 120 ° with reference to the position indicated by the arrow E1. The same applies to the other layers.

  Specifically, as shown in FIG. 2, for example, in the core plate 22 constituting the first layer, the position E1 of the end (abutting surface) where the divided core plates 20 abut each other is set at a predetermined angle θ1 (main In the embodiment, it is arranged at a total of three locations in increments of 120 °. In the core plate 22 constituting the second layer, the position E2 of the end where the divided core plates 20 come into contact with each other is shifted from the position E1 by a predetermined angle θ2 (30 ° in the present embodiment). In the core plate 22 constituting the third layer, the position E3 of the end is further shifted from the position E2 by a predetermined angle θ2 (30 °), and the same applies to the upper layer. Thus, in the rotor core 12, each layer is laminated in a state shifted by the predetermined angle θ2 (30 °). The predetermined angle θ2 is the same as the phase difference between the two adjacent magnet holes 16.

  As shown in FIG. 3, the split core plate 20 has two substantially rectangular projections (protrusions) 24 a and 24 b on the arcuate edge on the inner peripheral side, corresponding to each magnet hole 16. A total of four are formed.

  One convex portion 24a is displaced (displaced) from the center O of the arc of the split core plate 20 to one side (arrow R1 side) with respect to the center line CL passing through the center of the corresponding magnet hole 16. Has been. The other convex portion 24b adjacent to the convex portion 24a is disposed so as to be displaced to the other side (arrow R2 side) with respect to the corresponding center line CL. In other words, one convex portion 24a is arranged with the center line position in the diametrical direction displaced to one side (arrow R1 side) with respect to the center line CL of the corresponding magnet hole 16, and the other convex portion 24b is arranged such that the position of the center line in the diametrical direction is displaced to the other side (arrow R2 side) with respect to the center line CL of the corresponding magnet hole 16.

  Furthermore, the convex portions 24 a and 24 b are provided with rectangular positioning portions (caulking portions) 26 along the corresponding magnet holes 16, and the center line in the diameter direction of each positioning portion 26 is the center line with respect to the magnet holes 16. It is formed so as to coincide with CL. As shown in FIG. 6A, the positioning portion 26 includes a positioning convex portion 26a formed on the lower surface side of the split core plate 20 and protruding downward, and a positioning concave portion 26b formed on the inner wall surface of the positioning convex portion 26a on the upper surface side. It consists of and. As a result, the positioning portions 26 are engaged with the positioning recesses 26b of the core plate 22 below the positioning projections 26a and are caulked with each other. It functions as a joint that joins with strength.

  As can be seen from FIG. 3, the convex portions 24 a and 24 b are formed between the pair of side end portions 28 and 28 that extend in a substantially diametrical direction substantially orthogonal to the arc direction (R1 and R2 direction) of the split core plate 20. The width is a size obtained by combining the narrow width A with the center line CL as the center and the wide width B wider than the width A.

  In this case, in the convex part 24a and the convex part 24b, the site | part of the width A and the site | part of the width B are each arrange | positioned symmetrically. Therefore, as shown in FIGS. 1 and 2, when the core plates 22 constituting each layer are stacked with a predetermined angle θ2 (30 °) shifted, the convex portion 24a of any layer becomes the convexity of the upper and lower layers. Similarly, the convex portion 24b of any layer is sandwiched between the convex portions 24a of the upper and lower layers. Therefore, the convex portions 24a and 24b stacked in the layer direction (axial direction) on the inner peripheral side of the rotor core 12 are alternately stacked with the convex portions 24a displaced on one side and the convex portions 24b displaced on the other side. Accordingly, the side end portions 28 of the convex portions 24a and 24b are alternately unevenly laminated, and the position of the center line as a whole substantially coincides with the center line CL of the magnet hole 16 so that they are mutually in plan view. It arrange | positions at equal intervals (refer FIG. 5).

  On the other hand, as shown in FIGS. 1, 4A and 4B, the shaft 14 into which such a rotor core 12 is fitted includes a cylindrical portion 30 to be inserted into the inner peripheral side of the rotor core 12, and the axial direction of the cylindrical portion 30. In a state in which the rotor core 12 is inserted and assembled as the rotary electric machine rotor 10, the rotor core 12 is formed on the upper surface of the flange portion 32. The core plate 22 constituting the lowermost layer is abutted and disposed.

  On the outer peripheral surface of the cylindrical portion 30, there are groove portions 30 a extending in the axial direction corresponding to the convex portions 24 a and 24 b of the rotor core 12, at a predetermined number (number of grooves) at equal intervals in the circumferential direction every predetermined angle θ2 (30 °). 12 in the embodiment). Therefore, the rotor core 12 and the shaft 14 can be firmly coupled by providing a press-fitting allowance for fitting with the groove 30a in the convex portions 24a and 24b that are alternately laminated in the concave-convex shape of the rotor core 12. it can. That is, when the width of the groove 30a is defined as a width C, the width C is twice as large as the entire width B when the convex portions 24a and 24b are alternately stacked (width B2 in FIG. 6A). ) Is set narrower than.

  A cylindrical projection 34 having a smaller diameter and a lower height than the cylindrical portion 30 protrudes from the bottom surface side of the shaft 14 (see FIG. 4B). In the axial direction of the cylindrical portion 30 and the cylindrical protruding portion 34, The shaft holes 36a and 36b whose inner diameters are changed in two stages pass therethrough. The shaft holes 36a and 36b are holes for inserting a stator, a rotating shaft, etc. (not shown).

  FIG. 5 is a schematic plan view of the rotating electrical machine rotor 10 according to the present embodiment. 6A is a schematic cross-sectional view taken along the line VIA-VIA of FIG. 1 in the rotor core 12 before being fitted to the shaft 14, and FIG. 6B is a view after the shaft 14 and the rotor core 12 are fitted. 5 is a schematic cross-sectional view taken along line VIB-VIB of FIG.

  In the rotating electrical machine rotor 10 according to the present embodiment, as described above, in the rotor core 12 stacked by the positioning function and the coupling function of the positioning unit 26, the convex portions 24a and 24b of the core plate 22 constituting each layer are alternately stacked. At the same time, the side end portion 28 is uneven in the stacking direction (axial direction) of the rotor core 12 (see FIGS. 1 and 6A). At this time, the width of the stacked convex portions 24a and 24b apparently becomes a width B2 that is twice the width B, and protrudes from the width A portion around the center line CL outward from the width A portion. The width B portions (hereinafter referred to as wing portions 40) are provided in every other layer.

  Therefore, when the shaft 14 is inserted and inserted into the rotor core 12 stacked in this way, the width B2 in the stacked state of the convex portions 24a and 24b is larger than the width C of the groove portion 30a of the shaft 14, The side end portion 28 constituting the wing portion 40 is elastically warped (bent) in the insertion direction by the groove portion 30a (see FIG. 6B). Therefore, the wing portion 40 elastically stretches with respect to the groove portion 30a, that is, produces a spring-like effect, so that the shaft 14 and the rotor core 12 can be engaged with each other extremely reliably. Since pins or the like are not necessary, the manufacturing cost of the rotating electrical machine rotor 10 can be reduced.

  Thereby, for example, even if there is a variation (dimension error) in the dimensions of the split core plate 20, the rotor core 12 can be fixed to the shaft 14 without looseness. Moreover, due to the spring effect of the wing portion 40, it is possible to effectively avoid loosening or rattling between the shaft 14 and the rotor core 12 even when the rotary electric machine rotor 10 is used over time. The durability and reliability of the rotor 10 can be improved, and the occurrence of abnormal noise during use can also be suppressed.

  In the rotor core 12, the phase difference of the lamination of the core plate 22 between the layers is indexed and laminated in an angle unit (30 °) corresponding to one magnet hole 16. For this reason, it is possible to easily and reliably align the axial positions of the magnet holes 16 between the respective layers, and the side end portions 28 are uneven in the axial positions of the convex portions 24a and 24b between the respective layers. The wing portions 40 can be easily formed. In this case, since the convex portions 24a (24b) and the magnet holes 16 are regularly arranged at corresponding positions, the flow of magnetic flux through the rotor core 12 becomes irregular, heat generation due to eddy currents, fuel consumption, It is possible to effectively reduce the reduction in output and the like.

  Next, a rotating electrical machine rotor 10a as a rotating electrical machine according to a second embodiment of the present invention will be described. FIG. 7 is a schematic plan view of the rotating electrical machine rotor 10a according to the second embodiment, and FIG. 8 is an enlarged schematic plan view of the divided core plate 20a constituting the rotating electrical machine rotor 10a shown in FIG. . 7 and 8, the same reference numerals as those shown in FIGS. 1 to 6 indicate the same or similar configurations, and therefore are described in detail as having the same or similar functions and effects. The same shall apply hereinafter.

  Compared with the rotary electric machine rotor 10 according to the first embodiment, the rotary electric machine rotor 10a includes a rotor core (ring core) 12a in which a core plate 22a composed of a divided core plate 20a is stacked instead of the rotor core 12. Is different. As shown in FIG. 8, the split core plate 20 a has convex portions 44 a and 44 b formed by side end portions 41 and 42 having a step shape instead of the convex portions 24 a and 24 b of the split core plate 20 described above. Is provided.

  In this case, one convex portion 44a is located on the tip side, and has a first step portion 46 centered on the center line CL, and is wider than the first step portion 46 and on one side with respect to the center line CL ( And a second step portion 48a displaced in the direction of arrow R1). The other convex portion 44b includes a first step portion 46 and a second step portion 48b that is wider than the first step portion 46 and displaced to the other side (arrow R2 side) with respect to the center line CL. ing.

  Accordingly, in the rotor core 12a, as in the case of the rotor core 12 described above, the core plate 22a in which the divided core plates 20a are arranged in a ring shape is provided for each predetermined angle θ2, which is an angular unit corresponding to one magnet hole 16. Indexed and stacked. That is, the convex portions 44a and 44b of the core plate 22a constituting each layer are alternately stacked, and the projecting portions of the second step portions 48a and 48b to the side function as the wing portions 40 and are fitted into the groove portions 30a of the shaft 14. (See FIG. 7). As a result, as in the case of the rotary electric machine rotor 10 described above, in the rotary electric machine rotor 10a according to the present embodiment, the shaft 14 and the rotor core can be obtained by the spring effect by the blade portion 40 that is the protruding portion of the second step portions 48a and 48b. 12a can be reliably fitted.

  Incidentally, as can be seen from FIG. 7, the first step portion 46 on the tip side of the convex portions 44a and 44b has a positioning action when the tip portion abuts against the bottom portion of the groove portion 30a when the shaft 14 is fitted. Although fulfilling the function, the first step portion 46 is particularly effectively used also when the laminated core plate 20a is laminated to the rotor core 12a.

  Then, next, an example of the manufacturing method which shape | molds the rotor core 12a from the division | segmentation core plate 20a is demonstrated. FIG. 9A is a partially omitted plan view of the manufacturing apparatus 50 for laminating the rotor core 12a, and FIG. 9B is a schematic cross-sectional view taken along the line IXB-IXB in FIG. 9A.

  The manufacturing apparatus 50 is an example of a manufacturing apparatus (mold) that stacks and molds the rotor core 12a from the divided core plate 20a. As shown in FIG. 9A and FIG. 9B, the manufacturing apparatus 50 is mounted on a substantially cylindrical upper frame 56 having an annular groove formed on the inner peripheral side, and the annular groove of the upper frame 56. The ring member 58 is configured to be freely rotatable by 55 and a cylindrical lower frame 60 facing the lower surface of the upper frame 56 with a predetermined distance.

  An inner guide 62 backed up by a back pressure from the rod portion 61a of the hydraulic cylinder mechanism 61 and held at a predetermined position (height) is disposed on the inner peripheral side of the upper frame 56 and the lower frame 60. . The hydraulic cylinder mechanism 61 can be moved up and down and stopped at a predetermined position. A flange portion 61b is provided on the lower end side of the rod portion 61a, and the flange portion 61b is a flange formed on the inner peripheral portion of the lower frame body 60. The upper limit of the rod portion 61a is set by contacting the portion 60a. The tip surface (upper surface) of the rod portion 61a can be engaged with a recess (not shown) provided on the lower surface of the inner guide 62, whereby the inner guide 62 is positioned in the diameter direction. Yes.

  The inner guide 62 is configured in a substantially columnar shape including an outer peripheral surface in which an annular edge on the inner peripheral side of the split core plate 20a can be fitted and removed, in other words, an outer peripheral surface having a shape substantially coinciding with the annular edge. That is, a plurality of concave portions 62a extending in the axial direction are formed on the outer peripheral surface of the inner guide 62, and each concave portion 62a is formed at the tip side of the convex portions 44a and 44b formed on the inner peripheral side of the divided core plate 20a. The width and depth of the recess 62a correspond to the width between the side end portions 41 of the first step portion 46 and the length of the side end portion 41 in the diameter direction. (See FIG. 10).

  On the other hand, the rotation mechanism 55 includes a pulley 65 that rotates by being connected to the drive shaft 63 a of the servo motor 63, and a timing belt 67 that is wound between the pulley 65 and the ring member 58. Therefore, by rotating the pulley 65 by a predetermined angle by the servo motor 63 under the control of the servo control unit 69, the ring member 58 can be rotated by the predetermined angle via the timing belt 67 with high accuracy and speed. At this time, rotation angle information and angle position (phase) information of the ring member 58 detected by the sensor 71 disposed close to the ring member 58 are input to the servo control unit 69, and the servo control unit 69 stores the rotation angle information and The servo motor 63 can be feedback controlled based on the angular position information.

  In this case, in the manufacturing apparatus 50, when the split core plate 20a is press-fitted into the gap 51 between the outer peripheral surface of the inner guide 62 and the inner peripheral surface of the ring member 58, the split core plate 20a can be sandwiched. The dimensions are set. Accordingly, when the split core plate 20a is press-fitted from the upper end opening into the gap 51 under the pressing action of the punch 64, the concave portions 62a of the inner guide 62 form the convex portions 44a and 44b of the split core plate 20a. The first step portion 46 is supported, and the arc-shaped edge portion on the outer peripheral side of the divided core plate 20 a is supported by the inner peripheral surface of the ring member 58, so that the divided core plate 20 a is surely secured in the gap 51. Will be retained.

  Therefore, for example, when the first divided core plate 20a constituting the rotor core 12a is set at the press-fitting position D (see FIG. 9A) of the upper end opening of the gap 51, the punch 64 is lowered to cause the division. The core plate 20a is dropped into the gap 51.

  The split core plate 20a press-fitted into the gap 51 is slidably contacted with the first step portion 46 of the inner peripheral projections 44a and 44b in the recess 62a of the inner guide 62 and applied with an internal pressure. Then, the arc-shaped edge on the outer peripheral side is in sliding contact with the inner peripheral surface of the ring member 58 and external pressure is applied. That is, the divided core plate 20a dropped into the gap 51 is press-fitted into the gap 51 and fitted under the positioning action of the first step portion 46 and the concave portion 62a constituting the convex portions 44a and 44b. . Therefore, the split core plate 20a is reliably held in the gap 51 without dropping downward as indicated by a two-dot chain line in FIG. 9B. At this time, the inner guide 62 is backed up by the hydraulic cylinder mechanism 61 so that it is not displaced by the downward pressing force of the punch 64 and is held at a predetermined position.

  In the manufacturing apparatus 50, when the first divided core plate 20a is press-fitted into the gap 51 as described above, the second and subsequent divided core plates 20a are continuously ring-shaped into the gap 51. The layers are sequentially stacked while being arranged.

  That is, first, in a state where the first divided core plate 20a is held in the gap 51, the rotation mechanism 55 is driven to rotate the ring member 58 by a predetermined angle θ1 (120 °). In this case, the split core plate 20 a is fitted in the gap 51, and the first step portion 46 of the split core plate 20 is engaged with the recess 62 a of the inner guide 62. For this reason, the rotation of the ring member 58 is transmitted to the inner guide 62 via the split core plate 20 a, and the inner guide 62 is also synchronized with the ring member 58 under the backup action by the hydraulic cylinder mechanism 61. Turn θ1. Accordingly, the split core plate 20a held in the gap 51 also turns with the ring member 58 by a predetermined angle θ1.

  Next, the second divided core plate 20a is press-fitted into the gap 51 from the press-fitting position D in the same manner as the first divided core plate 20a. If it does so, the said 2nd division | segmentation core plate 20a will be arrange | positioned along with the circumferential direction with respect to the 1st division | segmentation core plate 20a. Therefore, after further rotating the ring member 58 by a predetermined angle θ1, when the third divided core plate 20a is press-fitted into the gap 51, the three divided core plates 20a are arranged in a ring shape on the same plane. Thus, the core plate 22a constituting the lowermost layer of the rotor core 12a is formed (see FIG. 10).

  As described above, the new core plate 22a, which is the upper layer of the formed core plate 22a, is stacked in a state of being shifted by one angular unit (predetermined angle θ2) of the magnet hole 16, so that the gap With the lowermost core plate 22a held by 51, the ring member 58 is turned by a predetermined angle θ2 (30 °) (see FIG. 10). Thus, the rotor core 12a can be easily and quickly formed by turning the core plate 22a by a predetermined angle θ2 and then forming each layer in the same manner as described above. At this time, since the respective layers are reliably bonded with a predetermined strength by the caulking action between the positioning portions 26, the press-in of the shaft 14 in the subsequent process can be performed more easily.

  As described above, the rotating electrical machine rotor 10a according to the present embodiment uses the split core plate 20a including the first step portion 46 and the second step portions 48a and 48b. On the other hand, the second stepped portions 48a and 48b can be used as the wing portion 40 when the rotor core 12a and the shaft 14 are fitted.

  Accordingly, when the rotor core 12a is laminated and formed, the first step portion 46, which is a positioning portion when being press-fitted into the gap 51, may be slightly deformed, but at this time, the second step portions 48a and 48b are deformed. Since this can be avoided reliably, the second step portions 48a and 48b function reliably as the wing portions 40 that produce a spring effect during and after the rotor core 12a and the shaft 14 are fitted. For this reason, even when using the manufacturing apparatus 50 for forming the rotor core 12a while press-fitting the split core plate 20a into the gap 51 as described above, the protrusions 44a and 44b are securely fitted into the groove 30a of the shaft 14. The durability of the rotating electrical machine rotor 10a can be improved by the spring effect. That is, according to the present embodiment, the projecting portion holding portion of the manufacturing apparatus 50 and the projecting portion holding portion of the shaft 14 constituting the rotating electrical machine rotor 10a, which is a product, can be easily made different. 14 and the rotor core 12a can be more securely fixed without rattling.

  In addition, about the 1st step part 46 and 2nd step part 48a, 48b which comprise the convex parts 44a and 44b, the 2nd step part 48a, 48b is used with the manufacturing apparatus 50 at the time of shaping | molding of the rotor core 12a, and the 1st step part It goes without saying that the portion 46 may be used as the wing portion 40 when the rotor core 12a and the shaft 14 are fitted together.

  Moreover, the shape of the convex portions 44a and 44b constituting the split core plate 20a can be changed as appropriate. For example, the split core plate 20b including the convex portions 70a and 70b shown in FIG. 11A or the convex portion 72a shown in FIG. A split core plate 20c made of 72b may be used. Also in such divided core plates 20b and 20c, either one of the first step portion and the second step portion constituting each convex portion may be used when the rotor core is molded, and the other is used when fitting to the shaft. .

  Note that the present invention is not limited to the above-described embodiments, and it is naturally possible to adopt various configurations without departing from the gist of the present invention.

  For example, although the number of divided core plates constituting each layer is three in each of the above embodiments, it is needless to say that the number of divided core plates is not limited to this, and when the number is changed, the angles θ1 and θ2 are also adjusted. You can change it. Similarly, the number of projections 24a and 24b (44a and 44b) and the number of magnet holes 16 and the like can be appropriately changed.

  Further, the manufacturing apparatus 50 for forming the rotor core 12a constituting the rotating electrical machine rotor 10a is merely an example, and can naturally be applied to manufacturing apparatuses having other configurations.

  Further, for example, in the rotor core 12 constituting the rotating electrical machine rotor 10 described above, a divided core plate 20d in which the arrangement of the convex portions 24a and 24b is changed may be used instead of the divided core plate 20, as shown in FIG. it can. That is, in the divided core plate 20d, the convex portions 24a, the convex portions 24a, the convex portions 24b, and the convex portions 24b are arranged in this order. Therefore, in this case, the phase difference when each layer is laminated is set to two angle units θ3 (twice the predetermined angle θ2) that is an integral multiple of the angle unit between the adjacent magnet holes 16. Thus, the wing portion 40 can be formed between the respective layers. Needless to say, the configuration in which two similar convex portions are arranged like the divided core plate 20d is also applicable to the divided core plate 20a and the like constituting the rotating electrical machine rotor 10a.

It is a disassembled perspective view of the rotary electric machine rotor as a rotary electric machine which concerns on the 1st Embodiment of this invention. It is the disassembled perspective view which decomposed | disassembled some rotor cores shown in FIG. It is a schematic plan view of the split core plate which comprises the rotor core shown in FIG. 4A is a schematic plan view of the shaft shown in FIG. 1, and FIG. 4B is a schematic cross-sectional view taken along line IVB-IVB in FIG. 4A. It is a schematic plan view of the rotary electric machine rotor shown in FIG. 6A is a schematic cross-sectional view taken along the line VIA-VIA of FIG. 1 in the rotor core before being fitted to the shaft, and FIG. 6B is a line VIB-VIB of FIG. 5 after the shaft and the rotor core are fitted. FIG. It is a schematic plan view of the rotary electric machine rotor which concerns on the 2nd Embodiment of this invention. It is the schematic plan view to which the division | segmentation core plate which comprises the rotary electric machine rotor shown in FIG. 7 was expanded. 9A is a partially omitted plan view of the manufacturing apparatus for stacking the rotor cores shown in FIG. 7, and FIG. 9B is a schematic cross-sectional view taken along the line IXB-IXB in FIG. 9A. FIG. 9B is a partially omitted plan view showing a state in which the rotor core is formed by stacking the split core plates by the manufacturing apparatus shown in FIG. 9A. 11A is a schematic plan view showing a modification of the split core plate shown in FIG. 8, and FIG. 11B is a schematic plan view showing another modification of the split core plate shown in FIG. It is the disassembled perspective view which decomposed | disassembled a part of rotor core which concerns on the modification of the rotor core shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10a ... Rotary electric machine rotor 12, 12a ... Rotor core 14 ... Shaft 16 ... Magnet hole 18 ... Magnet 20, 20a, 20b, 20c, 20d ... Split core plate 22, 22a ... Core plate 24a, 24b, 44a, 44b, 70a , 70b, 72a, 72b ... convex part 26 ... positioning part 28, 41, 42 ... side end part 30a ... groove part 40 ... wing part 46 ... first step part 48a, 48b ... second step part 51 ... gap

Claims (3)

A rotation provided with a ring core formed by stacking a plurality of split core plates while arranging them in a ring shape, a shaft fitted into the ring core, and a magnet inserted into a magnet insertion hole formed in the split core plate An electric machine,
On the inner peripheral side of the divided core plate, there are provided a plurality of convex portions arranged with the position of the center line displaced in the diametrical direction with respect to the magnet insertion hole,
The ring core is laminated such that the side ends of the convex portions are alternately uneven along the axial direction of the ring core, and the side ends of the divided core plates laminated in an alternately uneven manner are attached to the shaft. A rotating electrical machine characterized by being fitted. The rotating electrical machine according to claim 1, wherein
The magnet insertion holes are formed at least at equal intervals in the divided core plate,
The convex portions are arranged corresponding to the magnet insertion holes, respectively, and at least one set of adjacent convex portions has one convex portion having a center line position in the diameter direction with respect to the magnet insertion holes. Displaced to one side, the other convex portion is disposed with the center line position in the diametrical direction displaced to the other side with respect to the magnet insertion hole,
The ring core is formed by laminating the plates in which the divided core plates are arranged in a ring shape by sequentially shifting the division position in an angle unit that is an integral multiple of the angle unit between the adjacent magnet insertion holes. Rotating electric machine. The rotating electrical machine according to claim 1 or 2,
The side end portion of the convex portion of the split core plate has a step shape, and includes a first step portion having a predetermined width dimension and a second step portion wider than the first step portion. Rotating electric machine.

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