JP5315967B2 - Rotating electrical machine rotor manufacturing method and rotor - Google Patents

Description

  The present invention comprises a laminated electrical steel sheet in which a permanent magnet is fixed with a resin in a magnet housing hole formed in a rotor core of a rotating electrical machine, and a resin continuous with the magnet fixing resin is bonded to both end faces of the rotor core. The present invention relates to a rotor formed with a resin portion that sandwiches a rotor core.

  In a rotating electrical machine used for an electric vehicle or a hybrid vehicle, a magnet housing hole is formed in a rotor core composed of laminated electromagnetic steel sheets, and a resin is filled between the permanent magnet inserted into the magnet housing hole and the rotor core, There is a permanent magnet embedded rotor in which a permanent magnet is bonded and fixed to a rotor core via a resin.

In Patent Document 1, when a permanent magnet is resin-molded in a magnet accommodation hole, positioning pins protruding from molds arranged on both axial sides of the rotor core are brought into contact with the end face of the permanent magnet, and the permanent magnet is placed in the magnet accommodation hole. A resin portion that is filled with resin in a state where it is positioned, and that is filled in the magnet housing hole to fix the permanent magnet, and a resin portion that has an end plate function for sandwiching the rotor core that adheres to the end surface of the rotor core continuously to the resin portion A technique for integrally forming the two is disclosed. According to this technology, it is possible to reduce the weight as compared with a general metal end plate, and at the same time, the permanent magnet can be fixed and the end plate can be generated at the same time in one resin molding process. Cost can be reduced.
JP 2006-115659 A

  By the way, in the rotor described in Patent Document 1, the entire area of both end surfaces in the axial direction of the permanent magnet is covered as a resin molding region for sandwiching the rotor core, so that the permanent magnet is inserted into the magnet housing hole with a small diameter during the resin molding. It is positioned with the pin.

  However, in such a configuration, the hole generated by the positioning pin expands due to the shrinkage of the resin during cooling, generates a large tensile stress on the inner peripheral surface, and further causes stress concentration due to the rotational centrifugal force of the rotor. There was a risk of cracking.

  The present invention has been made paying attention to such a conventional problem, and is a rotor of a rotating electrical machine in which a resin portion for fixing a permanent magnet and a resin portion bonded to the end surface of the rotor core and having a rotor core clamping function are integrally formed. The purpose is to ensure the durability of the resin part.

For this reason, in the rotor manufacturing method according to the present invention, the laminated electrical steel sheet is formed on a rotor core formed by a laminated electrical steel sheet in which the electrical steel sheets are laminated along the axial direction of the rotor shaft and fixed to the outer peripheral surface of the rotor shaft. A plurality of magnet housing holes including a long hole-like opening extending along the axial direction of the rotor shaft and extending in a predetermined direction in the length direction are formed along the circumferential direction, and the length of the opening of the magnet housing hole is a plurality of permanent magnet insertion placed into each of the magnet containing hole so as to form an air gap at both ends of the direction, of the opening of the magnet containing hole in both end surfaces in the axial direction of the rotor shaft of the permanent magnet Magnet fixing resin for fixing the permanent magnet to the rotor core by filling the gap in each of the plurality of magnet receiving holes while positioning the intermediate portion along the length direction in contact with the positioning surface of the positioning means. you molded parts

At this time, as Russia stator core sandwiching resin portion provided on each of both end faces in the axial direction of the rotor shaft, the intermediate portion along the length direction of the opening while successively annularly along the circumferential direction of the rotor shaft An annular portion formed radially inward or outward of the rotor shaft, and when the annular portion is formed radially inward from the intermediate portion, the rotor shaft extends from the annular portion. When the annular portion is formed on the radially outer side of the rotor shaft from the intermediate portion, the rotor shaft is radially inward from the annular portion. When a plurality of tongue pieces extending to the side are formed and the annular part is formed on the radially outer side of the rotor shaft, the annular part causes each of the openings in the length direction to be formed. Covering the gap formed at the end on one end side, and the length of each of the openings by the plurality of tongue pieces When the annular portion is formed on the radially inner side of the rotor shaft and covers the gap formed at the other end side in the direction, the length of each of the openings by the plurality of tongue pieces The rotor clamping resin portion is connected to the magnet fixing resin portion by covering each of the gaps formed at both ends in the vertical direction.

The rotor of the rotating electrical machine according to the present invention is formed by a laminated electromagnetic steel plate in which a rotor shaft and an electromagnetic steel plate are laminated along an axial direction of the rotor shaft and fixed to an outer peripheral surface of the rotor shaft , A rotor core having a plurality of magnet housing holes formed along a circumferential direction, each having an elongated hole-like opening that penetrates the electromagnetic steel sheet along the axial direction of the rotor shaft and has a length direction extending in a predetermined direction at an end. When a plurality of permanent magnets which the are inserted in the magnet containing hole so as to form an air gap at both ends in the longitudinal direction of the opening of each of the magnet containing hole, the plurality of accommodating the permanent magnets in each the filled in each of the air gap of the magnet containing hole, the permanent magnet the rotor shaft of the plurality of permanent to the rotor core an intermediate portion along the length direction of the opening of the both end faces in the axial direction as the exposed region of the magnet fixed to fix the magnet And the resin portion, the including.

The rotor of the rotating electrical machine is a rotor core clamping resin portion provided on each of the axial end surfaces of the rotor core, and is continuously annularly formed along the circumferential direction of the rotor shaft and has a length of the opening. An annular portion formed radially inward or outward of the rotor shaft from an intermediate portion along the direction, and the annular portion is formed radially inward of the rotor shaft from the intermediate portion. In the case where the annular portion is extended radially outward of the rotor shaft from the annular portion, and the annular portion is formed radially outward of the rotor shaft from the intermediate portion, the A tongue piece extending from the annular portion to the radially inner side of the rotor shaft, and when the annular portion is formed on the radially outer side of the rotor shaft, the annular portion Covering the gap formed at the end of one end in the length direction of each of the openings, A plurality of tongue pieces covering the gap formed at the other end in the longitudinal direction of each of the openings, and when the annular portion is formed radially inward of the rotor shaft , said plurality of rotor core clamping resin portion covering each of the gaps formed at both ends coupled to the magnet fixing resin portion in the length direction of each of the opening by the tongue portion, the including .

  With such a configuration, the magnet fixing resin portion and the rotor core clamping resin portion can be formed at the same time, and this type of rotor can be reduced in weight, improved in manufacturing efficiency, and reduced in manufacturing cost. In addition to ensuring the strength by making the resin portion annular, the following effects are obtained.

Contact surface between the put that much-decided Me means the axial end surface of the permanent magnet (exposed region), it is possible to the non-molding region of the rotor core clamping resin part, as vent holes for positioning pins in the rotor core clamping resin portion No cracks are formed, and cracking of the resin portion can be prevented, and durability can be ensured.

  Embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a rotor of a rotating electrical machine according to an embodiment of the present invention. The rotating electric machine is applied to, for example, a motor generator that serves as both an electric motor and a generator in a hybrid vehicle.

  The rotor 1 includes a rotor shaft 2, a rotor core 3 fixed to the outer periphery of the rotor shaft 2, a plurality of permanent magnets 4 embedded in the rotor core 3, and a magnet fixing unit that fixes the permanent magnet 4 to the rotor core 3. A resin part 5 and a rotor core clamping resin part 6 that clamps both end faces of the rotor core 3 inward in the axial direction are configured.

The rotor core 3, the axial direction of the plurality of electromagnetic steel plates 3a rotor core 3 (up-down direction in FIG. 2, hereinafter, the axial direction hereinafter) are formed stacked along a, the outer peripheral portion of the rotor core 3 , Ru Tei magnet containing hole 7 formed through the axial direction is more arranged in the circumferential direction of the rotor core 3.

In the present embodiment, the plurality of magnet housing holes 7 make effective use of reluctance torque, so that a pair of permanent magnets 4 that constitute one magnetic pole adjacent to each other expand outward in the radial direction of the rotor core 3. It is formed in the rotor core 3 so as to form a letter shape, and each of the plurality of permanent magnets 4 is disposed in each magnet accommodation hole 7. As shown in FIG. 2, in this embodiment, the end surface of the permanent magnet 4 in the axial direction ( the axial direction of the rotor shaft 2 and the vertical direction of the paper in FIG. 2) and the end surface of the rotor core 3 in the axial direction are the same surface. Thus, the length along the rotor shaft biaxial direction of the permanent magnet 4 and the length (thickness) of the rotor core 3 along the rotor shaft biaxial direction are made the same.

As shown in FIG. 1, the plurality of magnet containing holes 7, a portion close to each other in the rotor core 3 radially inwardly of the magnet containing hole 7 of a pair of adjacent form the V-shape, separated from each other in the radially outward Are formed on the outside of the pair of side surfaces parallel to the axial direction of the permanent magnet 4 to be accommodated.

  A pair of gaps formed between the inner surfaces of the expanded both side portions of the magnet housing hole 7 and the pair of side surfaces of the permanent magnet 4 are filled with resin, and the permanent magnet 4 is inserted into the magnet housing hole 7. The magnet fixing resin portion 5 (5A, 5B) to be fixed to the rotor core 3 is formed. The resin of the magnet fixing resin portion 5 may be filled not only in the pair of both side portions of the magnet housing hole 7 but also in a narrow gap between the permanent magnet 4 and the inner surface of the magnet housing hole 7 therebetween. The adhesion surface with the permanent magnet 4 is increased, and the permanent magnet 4 can be fixed more firmly.

The rotor core sandwiched for resins unit 6, the axially outer magnet containing hole 7 contiguous with the magnet fixing resins portion 5 adheres to both end surfaces of the rotor core 3. Specifically, a plurality of magnet fixing resin portions 5A on the outer side in the radial direction of the rotor core 3 are connected to each other and the annular portion 6A that is continuous in the circumferential direction, and the diameter of the rotor core 3 from a plurality of circumferential locations of the annular portion 6A. A tongue piece portion 6B that extends inward in the direction and covers the magnet fixing resin portion 5B adjacent to each other inside the rotor core 3 in the radial direction of the pair of V-shaped magnet housing holes 7. The

  The rotor core 3 is fixed to the rotor shaft 2 by shrink fitting.

  Next, a method for manufacturing the rotor 1 will be described with reference to FIG.

The rotor 1 injection-molds the magnet fixing resin portion 5 and the rotor core clamping resin portion 6 in a state where the rotor core 3 and the rotor shaft 2 are fixed and the permanent magnet 4 is inserted and positioned in each magnet accommodation hole 7. Formed by.

  FIG. 3 shows how the resin part is injection-molded by an injection molding machine.

The injection molding machine 11 can open and close the rotor assembly in a state before molding the resin part as a mold, with a fixed mold 11A and a movable mold 11B arranged to be opened and closed in the axial direction, and in a direction perpendicular to the axial direction. And a slide mold 11C.

Slide 11 C is disposed radially outward of the rotor core 3, depending on the circumferential direction 3 is divided, known toggle mechanism or a hydraulic cylinder, respectively in conjunction with the opening and closing movement of the movable mold 11B is, It opens and closes while sliding along the radial direction of the rotor core 3, and a mold clamping force is applied during resin molding.

  The inner surface of the slide mold 11C is formed with a contact surface that forms a circular shape when the mold is clamped and closed to contact the outer peripheral surface of the rotor core 3, and the roller assembly is attached to the fixed mold 11A. When the slide mold 11C is clamped after being set, each slide mold 11A applies a pressing force to the rotor core 3 from three points on the circumference.

Next, both ends of the rotor core 3 are clamped with the fixed mold 11A and the movable mold 11B to seal the whole, and molten resin is pressurized and injected from a resin injection port (not shown) formed in the movable mold 11B. Thus, the magnet fixing resin portion 5 and the rotor core clamping resin portion 6 are injection molded.

  Specifically, as shown in FIG. 5, the shape of the resin part 6 corresponds to the shape of the resin part 6 for sandwiching the rotor core on the end face of the fixed mold 11 </ b> A and the movable mold 11 </ b> B that contacts the end face of the rotor core 3. A recess 11a is formed, and the recess 11a communicates with the resin injection port.

  Therefore, the end surfaces of the fixed mold 11A and the movable mold 11B are such that the region 11b excluding the recess 11a is between the side edges adjacent to the magnet receiving holes 7 on the axial end surface of the rotor core 3 and the axial end surface of the permanent magnet 4. The permanent magnet 4 is positioned in the magnet housing hole 7 by abutting against the intermediate portions 4a and 4b and a region indicated by a one-dot chain line in FIG. 5 abutting against the intermediate portions 4a and 4b. That is, the fixed mold 11 </ b> A and the movable mold 11 </ b> B (each end face thereof) constitute positioning means, and the region indicated by the one-dot chain line in FIG. 5 is a contact surface with the axial end face of the permanent magnet 4.

  When the resin is injected from the resin injection port, the molten resin reaches the recess 11a in the fixed mold 11A from the recess 11a of the movable mold 11B through the magnet housing hole 7 of the rotor core 3 facing the recess 11a. 11a, the gap between the inner surface of the magnet housing hole 7 and the side surface of the permanent magnet 4, and the concave portion 11a of the movable mold 11B are sequentially filled with resin.

  After the resin is cooled and cured, each mold is removed to fix the permanent magnet 4 to the rotor core 3 in the magnet housing hole 7, and to the magnet fixing resin portion 5 outside the magnet housing hole 7. A rotor core clamping resin portion 6 that is continuously bonded to the rotor core 3 is formed.

  According to such a configuration, the magnet fixing resin portion 5 and the rotor core clamping resin portion 6 can be formed at the same time, and while ensuring the same effects as in the past, this type of rotor core can improve manufacturing efficiency and reduce manufacturing costs. The following effects are obtained.

  The ring-shaped rotor core clamping resin portion 6 is positioned so as to contact the intermediate portions 4a and 4b of the axial end surface of the permanent magnet 4, that is, the end surfaces of the fixed mold 11A and the movable mold 11B. 3, the contact surface of the permanent magnet serves as an exposed region and is set to be included in the non-molded region of the rotor core clamping resin portion 6.

  Accordingly, when the entire axial end surface of the permanent magnet is used as the molding region of the rotor core clamping resin portion as in the prior art, it is necessary to position the permanent magnet in the magnet housing hole when filling the resin. A small hole such as a hole for a positioning pin is not formed in the resin portion, so that the resin portion can be prevented from cracking and durability can be ensured.

  In addition, the rotor core clamping resin portion 6 is continuously integrated with the magnet fixing resin portion 5, and is continuously annularly formed in the circumferential direction of the rotor core 3 on the outer side in the radial direction of the rotor shaft 2. Adhesion can ensure sufficient strength while reducing the weight of the rotor 1 and thus the rotating electrical machine.

  In addition, the rotor core clamping resin portion 6 is annularly bonded to the end surface of the rotor core 3, so that the damping effect on the torsional vibration of the rotor core 3 can be enhanced.

  Further, in the rotor, it is essential to adjust the unbalance in the circumferential direction, and generally, an unbalanced portion having a large rotor mass is cut and adjusted in the circumferential direction of the metal end plate. In order to perform the unbalance adjustment with high accuracy, it is necessary that the member to be cut is continuous in the circumferential direction of the rotor and has a mass sufficient to secure a machining allowance.

In the present embodiment, the rotor core clamping resin section 6, by providing a predetermined amount or more in succession in an annular readily Ann shaved part of the rotor core sandwiching the resin portion 6 and easy cutting as compared with the metal material Balance adjustment can be performed. In this connection, when the rotor core clamping resin portion is provided intermittently in the circumferential direction so as to cover only the periphery of the magnet fixing resin portion in order to promote weight reduction, the rotor core clamping resin portion provides a good unloading. Balance adjustment is not possible.

  Further, in the rotor described in Patent Document 1, a resin is molded so as to cover the entire area of one end face of the rotor core, and the resin penetrates into the shaft hole of the rotor core and also functions to fix the rotor core to the rotor shaft. In contrast, the resin portion 6 for sandwiching the rotor core in the present embodiment is provided outside the rotor shaft 2 to reduce the weight, while the resin portion 6 has only a function of sandwiching the rotor core (laminated electromagnetic steel plate). The rotor core 3 is fixed to the rotor shaft 2 by shrink fitting as described above.

  The fixing by shrink fitting can strengthen the fixing force as compared with a method in which the rotor core as in Patent Document 1 is fixed to the rotor shaft via a resin. In a general rotor using a metal end plate, a flange provided on the rotor shaft is crimped to integrally fix the end plate and the rotor core. In this case, the end plate is made of a non-magnetic material such as aluminum or brass, and it is substantially difficult to fix with an iron rotor shaft by shrinkage fitting due to the difference in thermal expansion coefficient (initially). Even if it is fixed, it may loosen due to temperature rise during use). On the other hand, since the rotor core 3 and the rotor shaft 2 are both iron-based materials and have the same coefficient of thermal expansion, shrink fitting can be performed satisfactorily.

  Fixing by shrink fitting also has an advantage that it can be performed at a lower cost than fixing means by caulking or the like provided with the flange.

  Further, in shrink fitting, the rotor core 3 and the rotor shaft 2 can be firmly fixed, so that it is possible to omit the formation of an engaging portion for preventing the rotor core 3 and the rotor shaft 2 from rotating, and the cost can be further reduced.

  However, when it is difficult to ensure a sufficient anti-rotation function only by shrink fitting, for example, by speeding up the rotor, a convex portion provided on the inner peripheral surface of the rotor core 3 as shown in FIG. 3b and the recessed part 2a provided in the outer peripheral surface of the rotor shaft 2 may be engaged to provide a non-rotating function, followed by shrink fitting and fixing without rattling.

  In the present embodiment, the method of forming the resin parts 5 and 6 after fixing the rotor core 3 to the rotor shaft 2 by shrink fitting is shown. However, after the resin parts 5 and 6 are formed first, The rotor core 3 may be fixed to the rotor shaft 2 by shrink fitting, and the laminated electromagnetic steel sheet may be shrink-fitted to the rotor shaft 2 in a state where the laminated electromagnetic steel plates are integrated by the rotor core clamping resin portion 6. improves. However, while it is necessary to ensure the durable temperature of the resin parts 5 and 6 more than the temperature at the time of shrink fitting, there is no restriction in this embodiment. In the case where the rotor core 3 is first shrink-fitted into the rotor shaft 2 as in the present embodiment, workability can be ensured by temporarily fixing the electromagnetic steel plates to each other by dowel crimping or the like.

  In the present embodiment, the axial end face of the permanent magnet 4 and the axial end face of the rotor core 3 are on the same plane. In this case, the contact between the end faces of the fixed core 11A and the movable core 11B of the rotor core 3 is shown. What is necessary is just to form the contact surface and the contact surface which contact | abuts and positions the intermediate part of a permanent magnet end surface on the same surface.

  On the other hand, when the axial end face of the permanent magnet is deeper than the end face of the rotor core and is positioned in the magnet receiving hole, or when the axial end face of the permanent magnet is arranged to protrude from the end face of the rotor core, the shape corresponds to each shape. The abutment surface for positioning the fixed and movable permanent magnets (the region indicated by the alternate long and short dash line in FIG. 5) may be formed so as to protrude from or be drawn into the abutment surface with the end surface of the rotor core.

  In addition, a positioning pin mechanism that is movable in the axial direction is provided on the mold (fixed mold and movable mold), or a plurality of positioning pins with different axial lengths are prepared, and a positioning pin selected from them is mounted on the mold. Thus, a configuration may be adopted in which positioning is performed by contacting the end surface of the permanent magnet in the axial direction. In this case, for example, when the end face of the permanent magnet is deeper than the end face of the rotor core, a thin film of resin is coated around the positioning pin on the end face of the permanent magnet, and a pin hole is formed in the thin film. However, when the thickness is small (about 0.3 mm or less), cracks are unlikely to occur, and even if a crack occurs in the thin film, it stops at the thin film part and does not cause cracks to the rotor core resin part, so there is no problem. .

  The present invention can also be applied to a rotor (rotating electrical machine) in which the permanent magnet is arranged in the same number as the number of poles of the rotating electrical machine so that the longitudinal direction of the cross section perpendicular to the axis is perpendicular to the radial direction of the rotor core. This type of rotating electrical machine can be manufactured at a lower cost and smaller than a rotating electrical machine in which permanent magnets are V-shaped, and is suitable for a small hybrid vehicle or electric vehicle.

  In this, both ends of the magnet accommodation hole in a direction perpendicular to the radial direction of the rotor core are formed to extend outside the both side surfaces in the same direction of the permanent magnet, and the inner surfaces of the expanded side portions of the magnet accommodation hole; A pair of gaps formed between the pair of side surfaces of the permanent magnet is filled with resin, and the permanent magnet is fixed.

  Accordingly, the resin part for sandwiching the rotor core has an annular part that is annularly continuous radially inward of the rotor core from the magnet housing hole, and extends radially outward of the rotor core from a plurality of circumferential directions of the annular part to fix the magnet. What is necessary is just to make it the shape which has the tongue piece part which covers the resin part and continues with these.

Also in this embodiment, since the contact surface of each permanent magnet with the positioning means is set as a non-molding region of the rotor core clamping resin portion, the rotor core clamping resin portion has a small hole such as a positioning pin punch hole. It is no longer formed, so that the resin portion can be prevented from cracking and durability can be ensured. In addition, the same effects as the present embodiment can be obtained.

Figure rotor according to implementation embodiments of the present invention as viewed from the axial direction. XX arrow sectional drawing of the said rotor. Sectional drawing which shows the state at the time of injection-molding the resin part of the said rotor. The figure which looked at the slide type | mold used for the said injection molding from the axial direction. The figure which shows the contact surface shape with the fixed type | mold and movable type | mold rotor core used for the said injection molding. The figure which shows the deformation | transformation aspect of the fixing means of a rotor core and a rotor axis | shaft.

Explanation of symbols

      DESCRIPTION OF SYMBOLS 1 ... Rotor, 2 ... Rotor shaft, 3 ... Rotor core, 4 ... Permanent magnet, 5 ... Magnet fixing resin part, 6 ... Rotor core clamping resin part, 6A ... Annular part, 6B ... Tongue piece part, 7 ... Magnet accommodation hole , 11 ... injection molding machine, 11A ... fixed mold, 11B ... movable mold, 11C ... slide mold, 11a ... concave section

Claims (10)

Each of the electromagnetic steel plates penetrates the laminated magnetic steel sheet along the axial direction of the rotor shaft, and the rotor core is formed by laminated electromagnetic steel plates laminated along the axial direction of the rotor shaft and fixed to the outer peripheral surface of the rotor shaft. and and the length direction is formed along a plurality of magnet containing holes with a long hole-like opening extending in a predetermined direction in the circumferential direction,
Wherein the plurality of permanent magnet insertion placed into each of the magnet containing hole so as to form an air gap at both ends in the longitudinal direction of the opening of the magnet containing hole, both end faces in the axial direction of the rotor shaft of the permanent magnet While positioning the intermediate portion along the length direction of the opening of the magnet housing hole in contact with the positioning surface of the positioning means, the gaps of the plurality of magnet housing holes are filled with the permanent magnets. Molding a magnet fixing resin portion to be fixed to the rotor core,
As ii stator core sandwiching resin portion provided on each of both end faces in the axial direction of the rotor shaft, the rotor shaft from the intermediate portion along the length direction of the opening while successively annularly along the circumferential direction of the rotor shaft An annular portion formed on the radially inner side or the outer side of the rotor shaft, and when the annular portion is formed radially inward of the rotor shaft from the intermediate portion, the rotor shaft extends from the annular portion. When the annular portion is formed on the radially outer side of the rotor shaft from the intermediate portion, the rotor shaft is radially inward from the annular portion. Forming a plurality of tongue pieces extending to the side,
When the annular part is formed on the radially outer side of the rotor shaft, the annular part covers the gap formed at one end side in the length direction of each opening, and When the plurality of tongue pieces cover the gap formed at the end portion on the other end side in the length direction of each of the openings, and when the annular portion is formed on the radially inner side of the rotor shaft, The rotor clamping resin portion is connected to the magnet fixing resin portion by covering each of the gaps formed at both end portions in the length direction of each of the openings by the plurality of tongue pieces.
A method for manufacturing a rotor core of a rotating electric machine. A pair of the magnet housing holes for housing a pair of permanent magnets that form one magnetic pole adjacent to the rotor core in the circumferential direction are arranged on one end side in the length direction of the opening on the radially inner side of the rotor shaft. Close the other end side in the length direction of the opening is formed to expand away from the radially outer side of the rotor shaft ,
Wherein by the annular portion of the rotor core clamping resin portion covers the gap in the radial direction outer side of the rotor shaft of the magnet containing portion, radially inward of the rotor shaft the tongue portion from the annular portion Extending to the side and covering the gap on the radially inner side of the rotor shaft of the pair of magnet housing holes ,
The rotor manufacturing method of the rotary electric machine of Claim 1 . Each of the magnet housing holes is formed so that the length direction of the opening is orthogonal to the radial direction of the rotor shaft,
Forming the annular part of the resin part for sandwiching the rotor core on the radially inner side of the rotor shaft from the magnet accommodation hole;
The tongue piece portion before Symbol rotor core clamping resin portion, the diameter of the rotor shaft from said annular portion for the respective so as to cover the gap of each of the opposite sides of the longitudinal direction of the opening gap of the magnet containing hole Extending outward in the direction,
The rotor core manufacturing method of the rotary electric machine of Claim 1 . The positioning surface is formed in a mating surface of the mold of an injection molding machine, a rotor manufacturing method of a rotating electric machine according to any one of claims 1 to 3. The portion of the rotor core sandwiching the resin portion by cutting and to adjust the amount of unbalance in the circumferential direction of the rotor, the rotor manufacturing method of a rotating electric machine according to any one of claims 1 to 4. The rotor core, the shrink fitting is fixed to the outer circumferential surface of the rotor shaft, a rotor manufacturing method of a rotating electric machine according to any one of claims 1 to 5. A rotor shaft;
Is formed by laminating electromagnetic steel plates that are fixed to the outer peripheral surface of the electromagnetic steel plates are laminated along the axial direction of the rotor shaft the rotor shaft, and length to penetrate along the axial direction of the rotor shaft in the laminated electromagnetic steel plates A rotor core in which a plurality of magnet housing holes each having an elongated hole-shaped opening extending in a predetermined direction are formed along a circumferential direction;
A plurality of permanent magnets which are inserted in the said magnet containing hole so as to form an air gap at both ends in the longitudinal direction of the opening of each of the magnet containing hole,
The filled in each of the gaps of the plurality of the magnet containing hole a permanent magnet housed in each exposed intermediate portion along the length direction of the opening of the both end faces in the axial direction of the rotor shaft of the permanent magnet A magnet fixing resin part for fixing the plurality of permanent magnets to the rotor core as a region ;
A rotor core clamping resin portion provided on each of the axial end surfaces of the rotor core, the annular core being continuously annular along the circumferential direction of the rotor shaft, and the intermediate portion along the length direction of the opening An annular portion formed on the radially inner side or the outer side of the rotor shaft, and the annular portion when the annular portion is formed on the radially inner side of the rotor shaft from the intermediate portion From the annular portion to the rotor shaft when the annular portion is formed on the radially outer side of the rotor shaft from the intermediate portion. When provided with a plurality of tongue pieces extending radially inward, and the annular portion is formed radially outward of the rotor shaft, each of the openings is formed by the annular portion. Covering the gap formed at the end on one end side in the lengthwise direction, the front of the plurality of tongue pieces When the annular portion is formed on the radially inner side of the rotor shaft so as to cover the gap formed at the other end in the longitudinal direction of each opening, the plurality of tongue pieces A rotor core clamping resin portion that covers each of the gaps formed at both ends in the lengthwise direction of each of the openings by the portion and is connected to the magnet fixing resin portion;
A rotor of a rotating electric machine including The rotor core has a pair of magnet housing holes for housing a pair of permanent magnets that form one magnetic pole adjacent to the circumferential direction of the rotor shaft, and one end side in the length direction of the opening is radially inward. And the other end side in the length direction of the opening is formed so as to be separated on the radially outer side ,
The rotor core clamping resin portion, the annular portion covers the gap in the radial direction outer side of the rotor shaft of the pair of the magnet containing hole, the tongue portion of the rotor shaft from said annular portion Formed to extend radially inward and to cover the gap on the radially inner side of the rotor shaft of the pair of magnet housing holes,
The rotor of the rotary electric machine according to claim 7 . Each of the magnet housing holes is formed in the rotor core such that the length direction of the opening is orthogonal to the radial direction of the rotor shaft,
The rotor core clamping resin portion, the formed in an annular portion radially inward side of the rotor shaft than the magnets containing hole, the longitudinal direction of both sides of the opening of the front Kishita piece is the magnet containing hole Extending from the annular portion to the radially outer side of the rotor shaft for each gap so as to cover a region corresponding to each of the gaps,
The rotor of the rotary electric machine according to claim 7 . The rotor core, said by laminating electromagnetic steel sheets shrink-fitting is fixed to the outer peripheral surface of the rotor shaft, the rotor of the rotating electrical machine of any one of claims 7 to claim 9.