JP2005168074A - Dynamo-electric machine and manufacturing method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dynamo-electric machine where an end plate can be fixed effectively by a shaft. <P>SOLUTION: The dynamo-electric machine 100 is equipped with the shaft 1, a rotor core 2, and the end plate 4. The rotor core 2 consists of structure where a plurality of electromagnetic steel plates 21 are stacked in the direction DR1 of the rotating shaft 1, and its internal circumference end contacts with the shaft 1. The end plate 4 is arranged at the end face 2A of the rotor core 2. The flange 11 of the shaft 1 has such a thickness d that it becomes thinner as it goes toward its tip 11B from its base 11A, and it caulks the internal circumference end 41 of the end plate 4 by being curved in radial direction DR3 from the direction DR1 of the rotating shaft. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotating electrical machine and a method for manufacturing the rotating electrical machine.

  Patent Document 1 discloses a spindle motor that is excellent in wear resistance and impact resistance and can be miniaturized. The spindle mode includes a sleeve, a shaft, a thrust plate, and a flange.

  The shaft is fitted into the sleeve. The flange is fixed to one end of the shaft in the rotation axis direction. One surface of the thrust plate is in contact with one surface of the flange, and the other surface is caulked by a pointed end portion of a sleeve disposed on the outer peripheral side of the shaft. The caulking portion is fixed with an adhesive.

Thereby, the flange and the thrust plate are fixed. The thrust plate forms a thrust bearing portion that supports the axial load of the shaft in cooperation with the flange.
JP 2002-354742 A Japanese Patent Laid-Open No. 11-319711

  However, in the conventional spindle motor, since the tip of the sleeve has a certain thickness, stress is concentrated when the other surface of the thrust plate is caulked, and the deformation of the tip is biased. As a result, it is difficult to effectively fix the thrust plate.

  Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to provide a rotating electrical machine capable of effectively fixing an end plate by a shaft.

  Another object of the present invention is to provide a method of manufacturing a rotating electrical machine capable of effectively fixing an end plate by a shaft.

  According to this invention, the rotating electrical machine is a rotating electrical machine having a stator and a rotor provided so as to be rotatable with respect to the stator. The rotor includes a rotor core, a rotor shaft, an end plate, and a caulking member. The rotor shaft is provided in contact with the rotor core on the inner peripheral side of the rotor core. The end plate is disposed on one end surface of the rotor core in the rotation axis direction of the rotor and has an annular shape. The caulking member is provided integrally with the rotor shaft and has a shape curved toward the outer peripheral side of the rotor, and caulks the inner peripheral end of the end plate. And the contact part with the jig | tool of a crimping member has an inclination.

  Moreover, according to this invention, a rotary electric machine is a rotary electric machine which has a stator and the rotor provided rotatably with respect to the stator. The rotor includes a rotor core, a rotor shaft, an end plate, and a caulking member. The rotor shaft is provided in contact with the rotor core on the inner peripheral side of the rotor core. The end plate is disposed on one end surface of the rotor core in the rotation axis direction of the rotor and has an annular shape. The caulking member is provided integrally with the rotor shaft and has a shape curved toward the outer peripheral side of the rotor, and caulks the inner peripheral end of the end plate. The caulking member has a thickness that becomes thinner as it goes from the root part to the tip part.

  Preferably, the caulking member has a tapered shape.

  Furthermore, according to the present invention, the rotating electrical machine is a rotating electrical machine having a stator and a rotor provided to be rotatable with respect to the stator. The rotor includes a rotor core, a rotor shaft, an end plate, and a caulking member. The rotor shaft is provided in contact with the rotor core on the inner peripheral side of the rotor core. The end plate is disposed on one end surface of the rotor core in the rotation axis direction of the rotor and has an annular shape. The caulking member is provided integrally with the rotor shaft and has a shape curved toward the outer peripheral side of the rotor, and caulks the inner peripheral end of the end plate. And the inner peripheral edge part of an end plate consists of cross-sectional shape of circular arc shape or polygonal shape.

  Furthermore, according to the present invention, the rotating electrical machine is a rotating electrical machine having a stator and a rotor provided to be rotatable with respect to the stator. The rotor includes a rotor core, a rotor shaft, an end plate, and a caulking member. The rotor shaft is provided in contact with the rotor core on the inner peripheral side of the rotor core. The end plate is disposed on one end surface of the rotor core in the rotation axis direction of the rotor and has an annular shape. The caulking member is provided integrally with the rotor shaft and has a shape curved toward the outer peripheral side of the rotor, and caulks the inner peripheral end of the end plate. And the inner peripheral edge part of an end plate has the curved part curved with the caulking member.

  Preferably, the caulking member has a wall thickness that becomes thinner from the root portion toward the tip portion.

  Preferably, the caulking member has a substantially constant thickness from the root portion toward the tip portion.

  Furthermore, according to this invention, the manufacturing method of a rotating electrical machine is a manufacturing method of a rotating electrical machine having a stator and a rotor provided to be rotatable with respect to the stator. The rotor is disposed on the rotor core, a rotor shaft provided in contact with the rotor core on the inner peripheral side of the rotor core, and one end face of the rotor core in the rotor rotation axis direction, and the inner peripheral end is caulked by a caulking portion of the rotor shaft. And an end plate. The rotating electrical machine manufacturing method includes the first step of disposing the end plate on one end surface of the rotor core so that the inner peripheral end surface of the end plate is in contact with the caulking member extending in the rotation axis direction of the rotor shaft. A second step of curving the extended caulking member in the radial direction from the rotation axis direction so as to disperse, and caulking the inner peripheral end portion of the end plate by the caulking member.

  Preferably, in the second step, the caulking member whose thickness is reduced in the rotation axis direction is curved in the radial direction from the rotation axis direction, and the inner peripheral end portion of the end plate is caulked by the caulking member.

  Preferably, the second step includes a step of bringing the jig into contact with one main surface of the caulking member that is on the opposite side of the contact surface between the caulking member and the end plate, and a contact portion between the jig and the caulking member. A step of bending the caulking member from the rotation axis direction to the radial direction by a jig so as to move from the base portion to the tip end portion of the member, and caulking the inner peripheral end portion of the end plate.

  Preferably, the second step includes a step of bringing the jig into contact with one main surface of the caulking member that is on the opposite side of the contact surface between the caulking member and the end plate, and a contact portion between the jig and the caulking member. A step of bending the caulking member by a jig from the rotation axis direction to the radial direction so as to move from the tip portion of the member to the root portion, and caulking the inner peripheral end portion of the end plate.

  Preferably, the inner peripheral end of the end plate has an arc shape or a polygonal cross-sectional shape. In the second step of the manufacturing method, the caulking member is curved in the radial direction from the rotation axis direction along the arc shape or the polygonal shape, and the inner peripheral end portion of the end plate is caulked by the caulking member.

  Preferably, the end plate has a curved portion extending in the rotation axis direction at the inner peripheral end portion. In the first step of the manufacturing method, the end plate is disposed so that the inner peripheral end face and the curved portion of the end plate are in contact with the caulking member. In the second step, the caulking member and the bending portion are bent in the radial direction from the rotation axis direction, and the inner peripheral end portion of the end plate is caulked by the caulking member.

  In the rotating electrical machine according to the present invention, the caulking member formed integrally with the rotor shaft is curved so as to disperse the strain, and the end plate disposed on one end surface of the rotor core is caulked by the caulking member.

  Therefore, the caulking member can be hardly damaged. As a result, the caulking member can effectively fix the end plate.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
FIG. 1 is a schematic sectional view of a rotating electrical machine according to the present invention. Referring to FIG. 1, rotating electric machine 100 includes a rotor 10 and a stator 20. The rotor 10 is provided on the inner peripheral side of the stator 20 so as to be rotatable with respect to the stator 20.

  Rotor 10 includes a shaft 1, a rotor core 2, a magnet 3, and an end plate 4. The shaft 1 is made of an integrally molded casting. The rotor core 2 is provided in contact with the shaft 1 on the outer peripheral side of the shaft 1. The rotor core 2 has a structure in which a plurality of electromagnetic steel plates 21 are laminated in the rotation axis direction DR1 of the shaft 1. The magnet 3 is inserted into the rotor core 2.

  The end plate 4 is disposed on one end surface of the rotor core 2 in the rotation axis direction DR1 of the shaft 1. The inner peripheral end of the end plate 4 is caulked by the flange 11 of the shaft 1. Thereby, the end plate 4 is fixed.

  FIG. 2 is a plan view of the rotor 10 and the stator 20 as viewed from the direction A shown in FIG. With reference to FIG. 2, the rotor 10 is provided on the inner peripheral side of the stator 20 via a gap GAP. The shaft 1 of the rotor 10 is provided so as to be inscribed in the rotor core 2. The rotor core 2 and the end plate 4 have an annular shape. The end plate 4 is disposed so as to cover the end face of the rotor core 2, and the inner peripheral end 41 thereof is caulked in an annular shape by the flange 11 of the shaft 1.

  The rotor 10 has rotor magnetic poles 10A to 10H in the circumferential direction DR2. The rotor magnetic pole 10 </ b> A includes magnets 31 and 32, a magnet holding portion 33, and gaps 34 and 35.

  A substantially V-shaped hole 30 is formed in the rotor core 2 with respect to the outer periphery of the rotor 10. The hole 30 is formed so as to penetrate the rotor core 2 in the rotation axis direction of the shaft 1 (direction perpendicular to the paper surface in FIG. 2).

  The magnets 31 and 32 are inserted into the hole 30 from the rotation axis direction of the shaft 1 and are arranged in a substantially V shape with respect to the outer periphery of the rotor 10. The magnet holder 33 holds the magnets 31 and 32 against the centrifugal force generated by the rotation of the rotor 10.

  The gaps 34 and 35 are formed at both ends of the magnets 31 and 32 in the circumferential direction DR2 of the rotor 10 by inserting the magnets 31 and 32 into the holes 30, and a short-circuit magnetic path is formed at the ends of the magnets 31 and 32. To prevent.

  Each of the rotor magnetic poles 10B to 10H has the same configuration as the rotor magnetic pole 10A.

  The stator 20 has stator magnetic poles 20A to 20H in the circumferential direction DR2. Each of the stator magnetic poles 20A to 20H includes a tooth and a coil (not shown), and is formed by winding the coil around the tooth.

  The stator magnetic poles 20A to 20H generate a magnetic field when a current flows through the coil. The rotor 10 rotates in the circumferential direction DR2 when the magnetic force from the stator magnetic poles 20A to 20H of the stator 20 acts on the magnets 31 and 32 of the rotor magnetic poles 10A to 10H.

  FIG. 3 is an enlarged view of region B shown in FIG. The shaft 1 has a collar 11 at one end in the rotation axis direction DR1 of the shaft 1. The plurality of electromagnetic steel plates 21 are stacked in the rotational axis direction DR1 such that the inner peripheral end is in contact with the shaft 1.

  The end plate 4 is disposed on one end surface 2A of the rotor core 2 in the rotation axis direction DR1. In this case, the inner peripheral end 41 of the end plate 4 is in contact with the end surface 1A and the collar 11 of the shaft 1 in the rotation axis direction DR1.

  The collar 11 of the shaft 1 is curved in the radial direction DR3 (direction on the outer peripheral side of the rotor 10) from the rotation axis direction DR1 and caulks the inner peripheral end portion 41 of the end plate 4. The collar 11 has a thickness d that becomes thinner from the root part 11A toward the tip part 11B.

  FIG. 4 is a process diagram in the first embodiment in which the inner peripheral end portion 41 of the end plate 4 is caulked by the flange 11 of the shaft 1. Referring to FIG. 4, before caulking inner peripheral end portion 41 of end plate 4, collar 11 of shaft 1 has a tapered shape extending in the rotational axis direction DR <b> 1. The inner peripheral end surface 41 </ b> A of the end plate 4 is in contact with the collar 11. In this state, the mandrel 50 is pressed against the distal end portion of the collar 11 from the rotation axis direction DR1 to move the mandrel 50 in the rotation axis direction DR1 (see FIG. 4A).

  Then, the tip 11B is bent from the rotation axis direction DR1 to the radial direction DR3 with the point 11C of the collar 11 as a power point (see FIG. 4B). When the mandrel 50 is further moved in the rotation axis direction DR1, the collar 11 is further curved in the radial direction DR3 with the point 11D contacting the corner of the end plate 4 as a power point, and the inner peripheral end 41 of the end plate 4 is moved. Caulking (see FIG. 4C). Thereby, a series of processes are completed.

  By making the collar 11 of the shaft 1 into a tapered shape, the power point when the collar 11 is bent by the mandrel 50 moves from the point 11C to the point 11D. That is, the power point moves from the tip portion 11B of the collar 11 to the root portion 11A.

  As a result, the collar 11 is gradually deformed from the tip 11B, and the occurrence of distortion in the collar 11 is dispersed.

  Therefore, the collar 11 is hard to be damaged and can fix the end plate 4 effectively.

  FIG. 5 is another process diagram in the first embodiment in which the inner peripheral end portion 41 of the end plate 4 is caulked by the flange 11 of the shaft 1. FIG. 6 is an enlarged view of the collar 11 and the mandrel 50 of the shaft 1 shown in FIG.

  Referring to FIG. 6, the collar 11 has a curved surface 11 </ b> E having a locality radius R <b> 1 on the side opposite to the inner peripheral end 41 side of the end plate 4. In this case, the angle formed by the tangent line 5 of the curved surface 11E and the line 6 in the rotational axis direction DR1 of the shaft 1 is θ1.

  Further, the mandrel 50 has a curved surface 50A having a curvature radius R2. In this case, the angle formed by the tangent line 7 of the curved surface 50A and the line 8 in the rotation axis direction DR1 is θ2.

  In the process shown in FIG. 5, the curvature radii R1 and R2 are determined so that the ratio R2 / R1 between the curvature radius R1 and the curvature radius R2 is in the range of 1.0 to 1.2. That is, the curvature radii R1 and R2 are determined so that the curvature radius R2 of the curved surface 50A of the mandrel 50 is greater than or equal to the curvature radius R1 of the curved surface 11E of the collar 11. The angles θ1 and θ2 are determined so that the angle θ2 is equal to or greater than the angle θ1.

  Referring to FIG. 5, when a series of steps is started, as described in FIG. 4A, mandrel 50 is pressed against collar 11 from rotation axis direction DR <b> 1. In this case, as described above, the curvature radius R2 of the curved surface 50A is greater than or equal to the curvature radius R1 of the curved surface 11E, so the mandrel 50 contacts the collar 11 at a point 11F close to the base 11A of the collar 11 ( a)).

  When the mandrel 50 is moved in the rotation axis direction DR1, the contact point between the collar 11 and the mandrel 50 is moved from the point 11F to the point 11G, and the collar 11 is gradually deformed from the root portion 11A, and from the rotation axis direction DR1. Curved in the radial direction DR3 ((b) of FIG. 5).

  Thereafter, when the mandrel 50 is further moved in the rotation axis direction DR1, the collar 11 is further curved in the radial direction DR3, and caulks the inner peripheral end portion 41 of the end plate 4 (see FIG. 5C). Thereby, a series of processes are completed.

  In the process shown in FIG. 5, the collar 11 has a curved surface 11E, but the shape of the collar 11 after the collar 11 is bent from the rotation axis direction DR1 to the radial direction DR2 is in accordance with the process shown in FIG. 11 is the same as the shape when the rotating shaft direction DR1 is bent in the radial direction DR3.

  In this way, by setting the curvature radius R2 of the curved surface 50A of the mandrel 50 to be equal to or greater than the curvature radius R1 of the curved surface 11E of the collar 11, the contact between the collar 11 and the mandrel 50 is changed from the base portion 11A of the collar 11 to the tip portion 11B. Move to.

  As a result, the collar 11 can be gradually deformed from the base portion 11A, and the occurrence of distortion in the collar 11 can be dispersed. Therefore, the collar 11 is hard to be damaged and can fix the end plate 4 effectively.

  FIG. 7 is a schematic diagram of a cross-sectional structure of the collar 11 of the shaft 1. In FIG. 7, a circular or elliptical white circle represents graphite contained in the shaft 1 and the collar 11.

  Referring to FIG. 7, when the collar 11 is bent from the rotation axis direction DR <b> 1 to the radial direction DR <b> 3 according to the process shown in FIG. 5, five areas RE <b> 1 to RE <b> 5 are generated in the collar 11. The region RE1 and the region RE5 are regions where the influence on the shape change of the graphite due to the bending of the collar 11 is small. In addition, the region RE2 and the region RE4 are partially transition regions in which the shape change of graphite occurs. Further, the region RE3 is a region in which the shape of graphite greatly changes from a circular shape to an elliptical shape.

  The round graphite 12 has a particle size in the range of 20 to 60 μm. The elliptical graphite 13 is crushed in the thickness direction 14 of the collar 11 and extends in the length direction 15 of the collar 11. And the collapse rate of graphite is 10 to 15% of range. The regions RE1 and RE5 include the circular graphite 12, the regions RE2 and RE4 include the circular graphite 12 and the elliptical graphite 13, and the region RE3 includes the elliptical graphite 13.

  Thus, when the collar 11 is bent so as to be gradually deformed from the root portion 11A to the tip portion 11B according to the process shown in FIG. 5, only the circular graphite 12 exists from the root portion 11A toward the tip portion 11B. Region RE1, a region RE2 in which circular graphite 12 and elliptical graphite 13 are mixed, a region RE3 in which only elliptical graphite 13 is present, a region RE4 in which circular graphite 12 and elliptical graphite 13 are mixed, and a circular shape A region RE5 where only the graphite 12 exists is generated.

  In the process shown in FIG. 5, the curvature radius ratio R2 / R1 is not limited to the curvature radius ratio R2 / R1, and the curvature radius ratio R2 / R1 is 0.8. The inner peripheral end 41 of the end plate 4 may be caulked by the collar 11 using the radii of curvature R1 and R2 in the range of -1.0.

  FIG. 8 is another schematic view of the cross-sectional structure of the collar 11 of the shaft 1. When the inner peripheral end 41 of the end plate 4 is caulked by the collar 11 using the curvature radii R1 and R2 in which the ratio R2 / R1 of the curvature radius is in the range of 0.8 to 1.0, the shape of the graphite in the collar 11 The change is as shown in FIG.

  That is, referring to FIG. 8, in this case, three regions RE1 to RE3 are generated in the collar 11. Then, regions RE1, RE2, and RE3 are generated from the root portion 11A toward the tip portion 11B.

  When the inner peripheral end 41 of the end plate 4 is caulked by the collar 11 using the curvature radii R1 and R2 in which the ratio R2 / R1 of the curvature radius is in the range of 0.8 to 1.0, the collar 11 and the mandrel 50 Is moved from the tip 11B of the collar 11 to the base 11A. Therefore, the collapse of the graphite decreases from the tip 11B of the collar 11 toward the base 11A. As a result, only the region RE3 where only the elliptical graphite 13 exists, the region RE2 where the circular graphite 12 and the elliptical graphite 13 coexist, and only the circular graphite 12 exist from the tip portion 11B to the root portion 11A. A region RE1 is generated.

  Therefore, whether or not the end plate 4 is caulked by the collar 11 of the shaft 1 in accordance with the process shown in FIG. 5 can be determined by observing the shape of the graphite contained in the collar 11 after caulking.

  Further, the inner peripheral end 41 of the end plate 4 is caulked by the flange 11 by gradually deforming from the base 11A of the collar 11 to the tip 11B, or gradually deformed from the tip 11B of the collar 11 to the root 11A. Whether the inner peripheral end 41 of the end plate 4 is caulked by the collar 11 can be determined by observing the shape of the graphite contained in the collar 11 after caulking.

  As described above, according to the first embodiment, the inner peripheral end portion 41 of the end plate 4 is caulked by the flange 11 of the shaft 1 having a thickness that becomes thinner from the base portion 11A toward the tip portion 11B. 11 is dispersed. As a result, the collar 11 is not easily damaged, and the end plate 4 can be effectively fixed.

  Further, by setting a ratio R2 / R1 between the curvature radius R1 of the curved surface 11E of the collar 11 and the curvature radius R2 of the curved surface 50A of the mandrel 50 within a predetermined range, the base portion 11A toward the distal end portion 11B or the distal end The flange 11 can be gradually deformed from the portion 11B toward the root portion 11A, and the inner peripheral end portion 41 of the end plate 4 can be caulked. That is, by setting the ratio R2 / R1 within a predetermined range, the collar 11 can be bent so that distortion is dispersed and the inner peripheral end 41 of the end plate 4 can be caulked.

  The collar 11 is provided integrally with the shaft 1 and constitutes a “caulking member” that caulks the inner peripheral end 41 of the end plate 4.

[Embodiment 2]
FIG. 9 is a partial cross-sectional view of the shaft, rotor core, and end plate of the rotating electrical machine according to the second embodiment. Referring to FIG. 9, rotating electrical machine 100A according to the second embodiment is the same as rotating electrical machine 100 except that end plate 4 of rotating electrical machine 100 is replaced with end plate 4A.

  The end plate 4 </ b> A is obtained by adding a curved portion 42 to the inner peripheral end portion 41 of the end plate 4. The curved portion 42 is curved from the rotation axis direction DR1 to the radial direction DR3 in the same manner as the collar 11, and is in contact with the collar 11 of the shaft 1 from the end plate 4A side.

  FIG. 10 is a process diagram in Embodiment 2 for caulking the inner peripheral end 41 of the end plate 4A shown in FIG. Referring to FIG. 10, before caulking inner peripheral end portion 41 of end plate 4A, collar 11 of shaft 1 is formed in a tapered shape extending in rotation axis direction DR1. The curved portion 42 of the end plate 4A has a shape extending from the inner peripheral end 41 in the rotation axis direction. The inner peripheral end surface 41A of the end plate 4A and the inner peripheral end surface 42A of the bending portion 42 are in contact with the collar 11.

  In this state, the mandrel 50 is pressed against the tip of the collar 11 from the rotation axis direction DR1, and the mandrel 50 is moved in the rotation axis direction DR1 (see FIG. 10A).

  Then, as described in FIG. 4, the collar 11 is gradually deformed from the distal end portion 11B to the root portion 11A, and is bent from the rotation axis direction DR1 to the radial direction DR3. As the collar 11 is bent, the bending portion 42 is also bent from the rotation axis direction DR1 to the radial direction DR3. That is, the bending portion 42 is bent from the rotation axis direction DR1 to the radial direction DR3 while always supporting the collar 11 from the end plate 4A side. As a result, the collar 11 caulks the inner peripheral end 41 of the end plate 4A (see FIG. 10B). And a series of processes are completed.

  As described above, in the caulking method of the end plate 4A according to the second embodiment, the end plate 4A is caulked by bending the collar 11 while always supporting the collar 11 of the shaft 1 from the end plate 4A side by the bending portion 42. Features. Due to this feature, when the collar 11 is bent, the bending portion 42 always supports the point of action from the end plate 4A side, so that concentration of distortion in the collar 11 can be prevented. As a result, the collar 11 is hard to be damaged and can effectively fix the end plate 4A.

  When the end plate 4A is caulked in accordance with the process shown in FIG. 10, the collar 11 is gradually deformed from the distal end portion 11B to the root portion 11A, so that the curved collar 11 includes graphite having the shape shown in FIG.

  In the above description, it has been described that the end plate 4A is caulked by the collar 11 whose thickness gradually decreases from the root part 11A toward the tip part 11B. However, the present invention is not limited to this, and the root part is directed from the root part to the tip part. Alternatively, the end plate 4A may be caulked with a “rib” having a certain thickness.

  Even if such a “brief” is used, the “brief” is always supported from the end plate 4A side by the bending portion 42 and is curved from the rotational axis direction DR1 to the radial direction DR3, thereby preventing strain concentration in the brim. Because it can.

  Further, the ratio R2 / R1 between the radius of curvature R1 of the curved surface 11E of the collar 11 and the radius of curvature R2 of the curved surface 50A of the mandrel 50 is set in the range of 1.0 to 1.2, and the tip of the collar 11 from the base portion 11A. You may make it deform | transform into the part 11B gradually.

  As described above, the rotating electrical machine 100A according to the second embodiment includes the end plate 4A having the curved portion 42 that always supports the collar 11 from the end plate 4A side when the end plate 4A is caulked by the collar 11 of the shaft 1. It is characterized by that.

  Due to this feature, it is possible to prevent the concentration of distortion generated in the collar 11 during bending. As a result, the collar 11 is hard to be damaged and can effectively fix the end plate 4A.

  Others are the same as in the first embodiment.

[Embodiment 3]
FIG. 11 is a cross-sectional view of a part of the shaft, rotor core, and end plate of the rotating electrical machine according to the third embodiment. Referring to FIG. 11, rotating electric machine 100B according to the third embodiment is the same as rotating electric machine 100 except that end plate 4 of rotating electric machine 100 is replaced with end plate 4B.

  The end plate 4B has an inner peripheral end 41B instead of the inner peripheral end 41 of the end plate 4. The inner peripheral end portion 41 </ b> B has a circular arc shape 43 on the collar 11 side. The arc shape 43 of the inner peripheral end portion 41 </ b> B is in contact with the collar 11.

  FIG. 12 is a process diagram in Embodiment 3 for caulking the inner peripheral end 41B of the end plate 4B shown in FIG. Referring to FIG. 12, before caulking inner peripheral end portion 41B of end plate 4B, collar 11 of shaft 1 has a tapered shape extending in the rotational axis direction DR1. The inner peripheral end portion 41 </ b> B of the end plate 4 </ b> B is in contact with the collar 11 at a part of the arc shape 43.

  In this state, the mandrel 50 is pressed against the tip of the collar 11 from the rotation axis direction DR1, and the mandrel 50 is moved in the rotation axis direction DR1 (see FIG. 12A).

  Then, the collar 11 is gradually deformed from the distal end portion 11B to the root portion 11A as described in FIG. 4, and is bent from the rotation axis direction DR1 to the radial direction DR3. In this case, the collar 11 is curved in the radial direction DR3 along the arc shape 43 of the inner peripheral end portion 41B of the end plate 4B. Thereby, the inner peripheral end portion 41B of the end plate 4B is caulked by the collar 11 (see FIG. 12B). And a series of processes are completed.

  Since the collar 11 is curved along the arc shape 43 of the inner peripheral end portion 41B of the end plate 4B, the load of the mandrel 50 can be dispersed, and the occurrence of distortion in the collar 11 can be dispersed. As a result, the collar 11 becomes difficult to be damaged, and the end plate 4B can be effectively fixed.

  FIG. 13 is another cross-sectional view of a part of the shaft, the rotor core, and the end plate of the rotating electrical machine according to the third embodiment. The rotating electrical machine according to Embodiment 3 may be rotating electrical machine 100C shown in FIG. Referring to FIG. 13, rotating electric machine 100 </ b> C is the same as rotating electric machine 100 except that end plate 4 of rotating electric machine 100 is replaced with end plate 4 </ b> C.

  The end plate 4 </ b> C has an inner peripheral end portion 41 </ b> C instead of the inner peripheral end portion 41 of the end plate 4. The inner peripheral end portion 41 </ b> C has a polygonal shape 44 on the side of the collar 11. The polygonal shape 44 of the inner peripheral end portion 41 </ b> C is in contact with the collar 11.

  FIG. 14 is another process diagram in the third embodiment in which the flange 11 of the shaft 1 caulks the inner peripheral end portion 41C of the end plate 4C shown in FIG. Referring to FIG. 14, before caulking inner peripheral end portion 41C of end plate 4C, collar 11 of shaft 1 has a tapered shape extending in the rotational axis direction DR1. The inner peripheral end portion 41 </ b> C of the end plate 4 </ b> C is in contact with the collar 11 at a part of the polygonal shape 44.

  In this state, the mandrel 50 is pressed against the distal end portion of the collar 11 from the rotation axis direction DR1 to move the mandrel 50 in the rotation axis direction DR1 (see FIG. 14A).

  Then, as described in FIG. 4, the collar 11 is gradually deformed from the distal end portion 11B to the root portion 11A, and is bent from the rotation axis direction DR1 to the radial direction DR3. In this case, the collar 11 is curved in the radial direction DR3 along the polygonal shape 44 of the inner peripheral end portion 41C of the end plate 4C. As a result, the inner peripheral end portion 41C of the end plate 4C is caulked by the collar 11 (see FIG. 14B). And a series of processes are completed.

  Since the collar 11 is curved along the polygonal shape 44 of the inner peripheral end portion 41C of the end plate 4C, the position of the fulcrum moves and the load of the mandrel 50 can be dispersed. As a result, the occurrence of distortion in the collar 11 can be dispersed, the collar 11 becomes difficult to be damaged, and the end plate 4B can be effectively fixed.

  When the collar 11 is bent according to the process shown in FIG. 12 or FIG. 14, the bent collar 11 includes graphite having the shape shown in FIG.

  In the above description, it has been described that the end plate 4B or 4C is caulked by the flange 11 whose thickness gradually decreases from the root portion 11A toward the tip portion 11B. However, the present invention is not limited to this, and The end plate 4B or 4C may be caulked with a “brim” having a certain thickness toward the tip.

  Even if such a “brief” is used, the “brief” is curved from the rotational axis direction DR1 to the radial direction DR3 along the arc shape 43 or the polygonal shape 44 of the end plate 4B or 4C. This is because it is possible to prevent concentration.

  Further, the ratio R2 / R1 between the radius of curvature R1 of the curved surface 11E of the collar 11 and the radius of curvature R2 of the curved surface 50A of the mandrel 50 is set in the range of 1.0 to 1.2, and the tip of the collar 11 from the base portion 11A. You may make it deform | transform into the part 11B gradually. In this case, the curved collar 11 includes graphite having the shape shown in FIG.

  In this way, by gradually deforming from the base portion 11A to the tip portion 11B and bending the collar 11, the power point can be moved along the arc shape 43 or the polygonal shape 44. Can be distributed.

  As described above, in the third embodiment, the cross-sectional shape of the inner peripheral end portion of the end plate is an arc shape or a polygonal shape, so that the load of the mandrel 50 when the collar 11 is bent is dispersed. Is curved from the rotational axis direction DR1 to the radial direction DR3. Thereby, the generation | occurrence | production of the distortion in the collar 11 can be disperse | distributed. As a result, the collar 11 is less likely to be damaged, and the end plate 4B or 4C can be effectively fixed.

  Others are the same as in the first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  The present invention is applied to a rotating electrical machine capable of effectively fixing an end plate by a shaft. The present invention is also applied to a method of manufacturing a rotating electrical machine that can effectively fix an end plate by a shaft.

It is a schematic sectional drawing of the rotary electric machine by this invention. It is a top view of the rotor and stator seen from the A direction shown in FIG. It is an enlarged view of the area | region B shown in FIG. It is process drawing in Embodiment 1 which caulks the inner peripheral edge part of an end plate with the collar of a shaft. It is another process figure in Embodiment 1 which caulks the inner peripheral edge part of an end plate with the collar of a shaft. FIG. 6 is an enlarged view of a shaft collar and a mandrel shown in FIG. 5. It is a schematic diagram of the cross-sectional structure of the collar of a shaft. It is another schematic diagram of the cross-sectional structure of the collar 11 of the shaft 1. 6 is a cross-sectional view of a part of a shaft, a rotor core, and an end plate of a rotating electrical machine according to Embodiment 2. FIG. It is process drawing in Embodiment 2 which caulks the inner peripheral edge part of the end plate shown in FIG. 9 with the collar of a shaft. 6 is a cross-sectional view of a part of a shaft, a rotor core, and an end plate of a rotating electrical machine according to Embodiment 3. It is process drawing in Embodiment 3 which caulks the inner peripheral edge part of the end plate shown in FIG. 11 with the collar of a shaft. FIG. 12 is another cross-sectional view of a part of the shaft, the rotor core, and the end plate of the rotating electrical machine according to the third embodiment. FIG. 14 is another process diagram of the third embodiment in which the inner peripheral end portion of the end plate shown in FIG. 13 is caulked by the flange of the shaft.

Explanation of symbols

  1 shaft, 1A, 2A end face, 2 rotor core, 3, 31, 32 magnet, 4, 4A, 4B, 4C end plate, 5, 7 tangent, 6, 8 wire, 10 rotor, 10A-10H rotor magnetic pole, 11 collar, 11A root part, 11B tip part, 11C, 11D, 11F, 11G point, 11E, 50A curved surface, 12, 13 graphite, 14 thickness direction, 15 length direction, 20 stator, 20A-20H stator magnetic pole, 21 electrical steel sheet, 30 hole, 33 magnet holding part, 34, 35 gap, 41, 41B, 41C inner peripheral end, 41A, 42A inner peripheral end face, 42 curved part, 43 arc shape, 44 polygonal shape, 50 mandrel, 100, 100A, 100B, 100C Rotating electric machine.

Claims (13)

A rotating electrical machine having a stator and a rotor provided rotatably with respect to the stator,
The rotor is
Rotor core,
A rotor shaft provided in contact with the rotor core on the inner peripheral side of the rotor core;
An end plate having an annular shape, disposed on one end face of the rotor core in the rotation axis direction of the rotor;
A caulking member that is integrally provided on the rotor shaft and is curved toward the outer peripheral side of the rotor, and that caulks the inner peripheral end of the end plate;
A rotating electrical machine in which a contact portion of the caulking member with a jig has an inclination. A rotating electrical machine having a stator and a rotor provided rotatably with respect to the stator,
The rotor is
Rotor core,
A rotor shaft provided in contact with the rotor core on the inner peripheral side of the rotor core;
An end plate having an annular shape, disposed on one end face of the rotor core in the rotation axis direction of the rotor;
A caulking member that is integrally provided on the rotor shaft and is curved toward the outer peripheral side of the rotor, and that caulks the inner peripheral end of the end plate;
The caulking member is a rotating electrical machine having a thickness that becomes thinner as it goes from a root part to a tip part.   The rotating electrical machine according to claim 1, wherein the caulking member has a tapered shape. A rotating electrical machine having a stator and a rotor provided rotatably with respect to the stator,
The rotor is
Rotor core,
A rotor shaft provided in contact with the rotor core on the inner peripheral side of the rotor core;
An end plate having an annular shape, disposed on one end face of the rotor core in the rotation axis direction of the rotor;
A caulking member that is integrally provided on the rotor shaft and is curved toward the outer peripheral side of the rotor, and that caulks the inner peripheral end of the end plate;
The inner peripheral end portion of the end plate is a rotating electrical machine having an arc shape or a polygonal cross-sectional shape. A rotating electrical machine having a stator and a rotor provided rotatably with respect to the stator,
The rotor is
Rotor core,
A rotor shaft provided in contact with the rotor core on the inner peripheral side of the rotor core;
An end plate having an annular shape, disposed on one end face of the rotor core in the rotation axis direction of the rotor;
A caulking member that is integrally provided on the rotor shaft and is curved toward the outer peripheral side of the rotor, and that caulks the inner peripheral end of the end plate;
The inner peripheral end of the end plate is a rotating electrical machine having a curved portion that is curved together with the caulking member.   The rotating electric machine according to claim 4 or 5, wherein the caulking member has a thickness that becomes thinner as it goes from the root portion toward the tip portion.   The rotating electric machine according to claim 4 or 5, wherein the caulking member has a substantially constant thickness from the root portion toward the tip portion. A method of manufacturing a rotating electrical machine having a stator and a rotor provided rotatably with respect to the stator,
The rotor is
Rotor core,
A rotor shaft provided in contact with the rotor core on the inner peripheral side of the rotor core;
An end plate disposed on one end surface of the rotor core in the rotation axis direction of the rotor, and having an inner peripheral end portion caulked by a caulking portion of the rotor shaft,
The manufacturing method includes:
A first step of disposing the end plate on the one end surface of the rotor core such that an inner peripheral end surface of the end plate is in contact with a caulking member extending in the rotation axis direction of the rotor shaft;
A second step of curving the stretched caulking member radially from the rotational axis direction so as to disperse the strain, and caulking the inner peripheral end of the end plate with the caulking member. Production method.   The second step comprises bending a caulking member whose thickness is reduced in the rotation axis direction from the rotation axis direction to a radial direction, and caulking the inner peripheral end portion of the end plate with the caulking member. The manufacturing method of the rotary electric machine of 8. The second step includes
A step of bringing a jig into contact with one main surface of the caulking member existing on the side opposite to the contact surface between the caulking member and the end plate;
The jig is bent from the rotational axis direction to the radial direction by the jig so that a contact portion between the jig and the caulking member moves from a root portion to a tip portion of the caulking member, and the end plate The manufacturing method of the rotary electric machine of Claim 8 including the process which crimps the said inner peripheral edge part. The second step includes
A step of bringing a jig into contact with one main surface of the caulking member existing on the side opposite to the contact surface between the caulking member and the end plate;
The jig is bent from the rotational axis direction to the radial direction by the jig so that a contact portion between the jig and the caulking member moves from a tip portion to a root portion of the caulking member, and the end plate The manufacturing method of the rotary electric machine of Claim 8 including the process which crimps the said inner peripheral edge part. The inner peripheral end of the end plate has a circular or polygonal cross-sectional shape,
In the second step of the manufacturing method, the caulking member is bent in the radial direction from the rotation axis direction along the arc shape or the polygonal shape, and the inner peripheral end portion of the end plate is bent by the caulking member. The method for manufacturing a rotating electrical machine according to any one of claims 8 to 11, wherein the rotating electrical machine is caulked. The end plate has a curved portion extending in the rotation axis direction at the inner peripheral end portion,
In the first step of the manufacturing method, the end plate is disposed so that an inner peripheral end surface of the end plate and the curved portion are in contact with the caulking member,
9. The second step according to claim 8, wherein in the second step, the caulking member and the bending portion are bent in the radial direction from the rotation axis direction, and the inner peripheral end portion of the end plate is caulked by the caulking member. A method of manufacturing a rotating electrical machine.

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