JP2009195088A - Rotating electric machine and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electric machine capable of ensuring the strength of a rotor even at a high-speed rotation, the rotor equipped with a rotor core in which a plurality of magnetic plates made of a ferromagnetic material are stacked and which has end plates attached on both ends and is fastened using a fastening member. <P>SOLUTION: The rotor core configuring the rotor is formed by stacking a plurality of electromagnetic steel plates, wherein a through-hole 22 is formed outward from a position where a permanent magnet is embedded so as to extend in a shaft direction. In the through-hole 22, a cylindrical fastening member 23 for fastening the electromagnetic steel plates in cooperation with the end plates 17 are arranged so as to penetrate through the through-hole 22. A first communicating hole 25 communicating to the inside of the cylindrical fastening member 23 is formed on one of the end plates 17, and a gap Δ between the inner surface of the through-hole 22 and the cylindrical fastening member 23 is filled with a resin 28 supplied from the first communicating hole 25 and entering the gap Δ by a suction action from a second communicating hole 26 via a hole formed on the cylindrical fastening member 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

In a magnet-embedded electric motor (IPM motor) in which a magnet is embedded in a rotor (rotor core), the bridge portion is narrowed to reduce short-circuit magnetic flux, but through holes are made in laminated steel sheets to increase mechanical strength against centrifugal force. There is a method of reinforcing with a fastening member inserted into the through hole. Moreover, as a rotor of a synchronous reluctance motor, a core steel plate laminate formed by laminating a core steel plate in which a plurality of flux barrier groups are formed around a shaft hole formed in a central portion, and a core steel plate laminate A product has been proposed in which end plates respectively disposed on both sides of the steel plate are integrally coupled with a fastening member penetrating the flux barrier group (see Patent Document 1). A combination of rivets, fixing bolts and nuts has been proposed as the fastening member.
JP 2003-52156 A

  However, in the configuration in which fastening means such as rivets and fixing bolts are inserted into the flux barrier portion as in Patent Document 1, since there is a gap around the fastening means, the clearance is separated by centrifugal force during high-speed operation of the motor. The rotor may be deformed. Further, in the configuration in which the through hole for inserting the fastening member is formed without using the flux barrier and the fastening member is inserted through the through hole, as shown in FIG. 11, the inner surface of the through hole 61 and the fastening member A gap Δ is always generated between the peripheral surface 62 and the manufacturing tolerance and the fastening member 62. As a result, the rotor may be deformed in the same manner as described above during high-speed operation of the motor. It is conceivable to fill the gap Δ with resin, but since the gap Δ is very small, it is difficult to simply fill the resin from one end of the gap Δ. On the other hand, when the fastening member is inserted into the flux barrier as in Patent Document 1, there is a possibility that the gap is too large to sufficiently fill the resin.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to laminate a plurality of ferromagnetic magnetic plates and to provide end plates at both ends and to be fastened by a fastening member. An object of the present invention is to provide a rotating electrical machine that can ensure the strength of a rotor having a rotor core configured as described above even during high-speed rotation.

  In order to achieve the above object, the invention according to claim 1 is a rotor core in which a plurality of magnetic plates made of a ferromagnetic material are laminated, a through hole formed in the rotor core so as to extend in the axial direction, An end plate disposed at both ends of the rotor core; a cylindrical fastening member that is disposed through the through hole and that cooperates with the end plate to fasten the magnetic plate; And a rotor formed in one of the end plates and having a communication hole communicating with the inside of the cylindrical fastening member, and a resin filling a gap between the inner surface of the through hole and the cylindrical fastening member. It has.

  In the present invention, the rotor core constituting the rotor has a plurality of ferromagnetic magnetic plates laminated, and has end plates arranged at both ends thereof and through holes formed in the rotor core so as to extend in the axial direction. It is fastened by a cylindrical fastening member that is disposed through and fastens the magnetic plate in cooperation with the end plate. And the clearance gap between the inner surface of a through-hole and a cylindrical fastening member is filled with resin. Therefore, the strength of the rotor can be ensured even during high-speed rotation, compared to the case where a gap exists between the inner surface of the through hole and the fastening member.

  The invention according to claim 2 is the invention according to claim 1, wherein the rotor core is provided with a flux barrier that also serves as the through hole, and a plurality of partition plates are provided in the cylindrical fastening member in the flux barrier. The hole is formed at a location corresponding to the space between the partition plates in the cylindrical fastening member, and the space between the partition plates positioned so as to sandwich the portion where the holes are provided. The gap is filled with the resin. In this invention, since the flux barrier also serves as a through hole, it is not necessary to form a dedicated through hole for inserting the cylindrical fastening member. In addition, the entire gap between the inner surface of the flux barrier and the cylindrical fastening member is not filled with resin, but only in a portion where a hole is provided in the wall surface of the cylindrical fastening member at a location sandwiched between a plurality of partition plates. Filled with resin. Therefore, unlike the configuration in which the entire flux barrier is filled with resin, the entire gap to be filled with resin is filled, and the strength of the rotor can be ensured even during high-speed rotation. Moreover, the usage-amount of resin can be reduced.

  According to a third aspect of the present invention, in the first aspect of the present invention, the cylindrical fastening member is formed with the hole at a first end. A concave portion into which the second end portion of the cylindrical fastening member is fitted is formed in an end plate facing the second end portion of the cylindrical fastening member among the end plates, and at a position corresponding to the concave portion. A first communication hole communicating with the inside of the cylindrical fastening member is formed, and a second communication hole communicating only with a gap between the inner surface of the through hole and the outer surface of the cylindrical fastening member is formed. The resin is filled in the gap and the inside of the cylindrical fastening member. In this invention, since the resin is filled in the gap between the inner surface of the through hole and the outer surface of the cylindrical fastening member over almost the entire length of the cylindrical fastening member, it is possible to ensure high strength compared to the configuration of claim 2. it can.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the resin is a thermosetting resin. Therefore, in the present invention, unlike the case where a thermoplastic resin is used for the resin, there is no possibility that the resin is softened when the rotary electric machine is used.

  The invention according to claim 5 has a rotor core in which a plurality of magnetic plates made of a ferromagnetic material are laminated, and end plates disposed at both ends of the rotor core, and is formed to extend in the axial direction on the rotor core. A cylindrical fastening member that is disposed through the formed through-hole and that fastens the magnetic plate in cooperation with the end plate, and the cylindrical fastening member is disposed on one of the end plates. It is a manufacturing method of the rotary electric machine in which the communicating hole connected in the inside is formed. And the process which arrange | positions the said cylindrical fastening member in the state which penetrated the said through-hole in the state which has a clearance gap between the inner surface of the said through-hole, and the said cylindrical fastening member, and was clamped by the both end plates. And filling the inside of the cylindrical fastening member with resin from the communication hole in a fluid state and supplying the resin to the gap from the hole formed in the cylindrical fastening member. Further, the method includes a step of manufacturing a rotor by a method having a step of curing the resin after the resin is filled in a portion of the gap where the resin is to be filled.

  In the manufacturing method of the present invention, the cylindrical fastening member is disposed in a state where the through hole is penetrated with a gap between the inner surface of the through hole and the cylindrical fastening member and both ends are sandwiched between both end plates. . Then, in this state, the resin is filled into the tubular fastening member in a fluid state from the communication hole and supplied to the gap from the hole formed in the tubular fastening member. And after filling resin into the gap which should be filled with resin, resin is hardened and a rotor is manufactured. Therefore, the rotating electrical machine including the rotor can ensure the strength of the rotor even during high-speed rotation, as compared with the case where a gap exists between the inner surface of the through hole and the fastening member.

  According to the present invention, a plurality of ferromagnetic magnetic plates are laminated, end plates are provided at both ends, and the strength of a rotor having a rotor core configured to be fastened by a fastening member is increased at high speed. A rotating electrical machine that can be secured sometimes can be provided.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a magnet-embedded electric motor (IPM motor) will be described with reference to FIGS.

  As shown in FIG. 1, an electric motor 10 as a rotating electric machine has a housing 11 composed of a substantially cylindrical main body portion 11 a and a lid portion 11 b covering the opening, and is fixed to the inner peripheral surface of the housing 11. A child (stator) 12 is fixed. The stator 12 is cylindrical and a plurality of teeth 13 are provided at equal intervals on the inside. A coil (winding) 14 is wound around the teeth 13. Note that only the coil end of the coil 14 is shown. The winding method of the coil 14 may be distributed winding or concentrated winding.

  A rotor (rotor) 15 is disposed inside the stator 12. The rotor 15 includes a rotor core 16 in which a plurality of disk-shaped electromagnetic steel plates 16 a as magnetic plates made of a ferromagnetic material are stacked, a disk-shaped end plate 17 disposed at both ends of the rotor core 16, and the rotor core 16. And a rotary shaft 18 inserted through a shaft hole 15 a formed at the center of the end plate 17. The rotating shaft 18 is supported so as to be rotatable with respect to the housing 11 via a bearing 19 that is fixed to the approximate center of both the lid portions 11 b of the housing 11.

  As shown in FIG. 2, the permanent magnet 20 is embedded in the rotor core 16 in each virtual region equally divided into a plurality (four in this embodiment) in the circumferential direction. Each permanent magnet 20 is formed in an arc shape in cross section, and is embedded in a state of being mounted in a mounting hole 21 formed so as to protrude toward the center side of the rotor core 16. The permanent magnets 20 are magnetized so that the magnetization direction is the thickness direction, and the permanent magnets 20 arranged in adjacent virtual regions are arranged so that the outer peripheral side of the rotor core 16 has different poles. ing. The rotor core 16 is formed with a flux barrier (hole) 21 a that continues to the end of the mounting hole 21 and extends toward the outer peripheral side.

  A through hole 22 is formed in the rotor core 16 so as to extend in the axial direction on the outer peripheral side from the position where the permanent magnet 20 is embedded. A cylindrical fastening member 23 for fastening the electromagnetic steel plate 16 a in cooperation with the end plate 17 is disposed in the through hole 22 so as to penetrate the through hole 22.

  As shown in FIG. 3 (c), the cylindrical fastening member 23 is closed at the first end, and a plurality of holes 24 are formed at the first end of the peripheral wall that is the wall surface. As shown in FIGS. 3A and 3B, the end plate 17 provided on the side facing the second end of the cylindrical fastening member 23 has a first corresponding to each cylindrical fastening member 23. A communication hole 25 and a second communication hole 26 are formed. More specifically, as shown in FIGS. 4A and 4B, the second end of the cylindrical fastening member 23 is fitted to the end plate 17 facing the second end of the cylindrical fastening member 23. The concave portion 27 is formed, and the position corresponding to the concave portion 27, in the present embodiment, is a position that communicates only with the cylindrical portion of the cylindrical fastening member 23, and is cylindrical at a position that is concentric with the cylindrical member 23. A first communication hole 25 communicating with the inside of the fastening member 23 is formed. The end plate 17 is formed with a second communication hole 26 that communicates only with the gap Δ between the inner surface of the through hole 22 and the outer surface of the cylindrical fastening member 23, and a resin 28 is formed inside the gap Δ and the cylindrical fastening member 23. Is filled. A thermosetting resin is used as the resin 28. The end plate 17 on the first end side is also provided with a concave portion 27 in which the first end portion is fitted, and the hole 24 is an end portion of the gap Δ at a position where the hole 24 is not closed in the fitted state. It is formed in the position facing. The diameter of the cylindrical fastening member 23 is, for example, about 1/10 to 1/20 of the diameter of the electromagnetic steel plate 16 a, and the diameters of the first communication hole 25 and the second communication hole 26 are larger than the diameter of the cylindrical fastening member 23. small. Therefore, for convenience of illustration, in FIGS. 3A, 3B, 5B, and 6A, and FIGS. 4A and 4B, the cylindrical fastening member 23, the first The communication hole 25 and the second communication hole 26 are represented by sizes having different diameter ratios.

  The amount of the resin 28 filled in the cylindrical fastening member 23 is set by the strength of the cylindrical fastening member 23. For example, in the case where the strength of the cylindrical fastening member 23 is such a value that it is deformed so as to hinder the centrifugal force during high-speed rotation, the resin 28 is filled in the entire tubular fastening member 23, but the tubular shape If the strength of the fastening member 23 is high, the amount of the resin 28 filled in the cylindrical fastening member 23 is an amount necessary for completing the curing in a state where the resin 28 is filled in the entire gap Δ. Good.

  Next, a method for manufacturing the rotor 15 configured as described above will be described. In this manufacturing method, a plurality of electromagnetic steel plates 16a are laminated, the permanent magnet 20 is mounted in the mounting hole 21 and the through-hole 22 is formed, and the end plates disposed at both ends of the rotor core 16; A cylindrical fastening member 23 is prepared. The rotor core 16 is prepared in a state in which the electromagnetic steel plate 16a in which the mounting hole 21, the flux barrier 21a, the through hole 22 and the shaft hole 15a are formed by press working is temporarily fixed with an adhesive or the like.

  Then, the cylindrical fastening member 23 is disposed in a state where the through hole 22 is penetrated with a gap Δ between the inner surface of the through hole 22 and the cylindrical fastening member 23 and both ends are sandwiched between both end plates 17. The process to perform is performed. More specifically, as shown in FIG. 5A, the housing portion 31 of the jig 30 capable of housing the rotor 15 before the rotating shaft 18 is attached to the first end portion side of the cylindrical fastening member 23. The end plate 17 and the rotor core 16 to be arranged are sequentially arranged in a state where the end plate 17 is on the lower side. Next, a cylindrical fastening member insertion step is performed in which the cylindrical fastening member 23 is inserted into the through hole 22 with a gap Δ between the inner surface of the through hole 22 and the cylindrical fastening member 23. The cylindrical fastening member 23 is inserted into the through hole 22 with the first end portion being on the lower side. The first end portion of the cylindrical fastening member 23 is fitted into the recess 27 of the end plate 17, and the second end portion protrudes from the end surface of the rotor core 16. Next, when the end plate 17 having the first communication hole 25 and the second communication hole 26 is arranged so that the recess 27 is fitted to the protruding end of the cylindrical fastening member 23, as shown in FIG. The rotor core 16, the end plate 17, and the cylindrical fastening member 23 are arranged in a state where the cylindrical fastening member 23 penetrates the through hole 22 and both ends thereof are sandwiched between the both end plates 17.

  Next, a resin supply step is performed in which resin is filled in the cylindrical fastening member 23 in a fluid state and is supplied to the gap Δ from the hole 24 formed in the cylindrical fastening member 23. In the resin supply step, as shown in FIG. 6A, the resin is supplied into the cylindrical fastening member 23 from the first communication hole 25 of the end plate 17 using the resin supply nozzle 32 and the suction nozzle 33 is used. Then, the suction action is applied to the gap Δ from the second communication hole 26 of the end plate 17. The resin supply nozzle 32 is joined to the first communication hole 25 in an airtight state, and supplies the resin in a pressurized state.

  In this state, as shown in FIG. 6B, the flowable resin 28 supplied from the resin supply nozzle 32 into the cylindrical fastening member 23 is formed at the first end portion of the cylindrical fastening member 23. It moves from the formed hole 24 to the gap Δ. The resin 28 that has entered the gap Δ gradually moves toward the upper portion of the gap Δ by the suction action by the suction nozzle 33 and the pressurization action by the resin 28 supplied from the resin supply nozzle 32. Then, after the resin 28 is filled in the gap Δ where the resin should be filled, in this embodiment, the entire gap Δ, the suction action of the suction nozzle 33 and the supply of the resin from the resin supply nozzle 32 are stopped. This resin supply operation is sequentially performed on each cylindrical fastening member 23.

  After the resin supply operation is performed on all the cylindrical fastening members 23, the entire core 30 or the jig 30 is taken out from the jig 30, and the rotor core 16 sandwiched between the end plates 17 is placed in the heating furnace. A step of curing the resin 28 is performed. Then, after the resin 28 is cured by heating for a predetermined time, the rotor 15 is completed when the rotary shaft 18 is inserted and fixed out of the heating furnace. The electric motor 10 is manufactured by assembling the electric motor 10 using the rotor 15.

Next, the operation of the electric motor 10 configured as described above will be described.
When the electric motor is driven in a load state, a current is supplied to the coil 14 of the stator 12 to generate a rotating magnetic field in the stator 12 and a rotating magnetic field acts on the rotor 15. Then, the rotor 15 rotates in synchronization with the rotating magnetic field by the magnetic attractive force and the repulsive force between the rotating magnetic field and the permanent magnet 20.

  Each electromagnetic steel plate 16 a is fastened by the action of the cylindrical fastening member 23 inserted through the through hole 22 and both end plates 17. A gap Δ between the inner surface of the through hole 22 and the cylindrical fastening member 23 is filled with a resin 28. When the rotor 15 rotates at high speed, the centrifugal force acting on the rotor 15 during rotation increases. Therefore, in a state where there is a gap Δ between the inner surface of the through hole 22 and the cylindrical fastening member 23, the electromagnetic steel plate 16a may be deformed by the gap Δ due to centrifugal force, that is, the rotor 15 may be deformed. . However, in this embodiment, since the gap 28 is filled with the resin 28 and no space is left, the rotor 15 can have a strength that does not deform until it is disturbed by the centrifugal force during high-speed rotation.

According to this embodiment, the following effects can be obtained.
(1) The rotor 15 of the electric motor 10 includes a rotor core 16 in which a plurality of ferromagnetic magnetic plates (electromagnetic steel plates 16a) are stacked, a through hole 22 formed in the rotor core 16 so as to extend in the axial direction, End plates 17 disposed at both ends of the rotor core 16 and cylindrical fastening members 23 that are disposed through the through holes 22 and fasten the electromagnetic steel plates 16 a in cooperation with the end plates 17. A hole 24 is formed in the wall surface of the cylindrical fastening member 23, and a gap between the inner surface of the through hole 22 and the cylindrical fastening member 23 is filled with a resin 28. Therefore, the strength of the rotor 15 can be ensured even during high-speed rotation, as compared with the case where the gap Δ exists between the inner surface of the through-hole 22 and the cylindrical fastening member 23 as it is.

  (2) A hole 24 is formed in the first end portion of the cylindrical fastening member 23, and the end plate 17 of the both end plates 17 facing the second end portion of the cylindrical fastening member 23 is formed of the cylindrical fastening member 23. A concave portion 27 into which the second end portion is fitted is formed. The end plate 17 is formed with a first communication hole 25 communicating with the inside of the cylindrical fastening member 23 at a position corresponding to the recess 27, and a gap between the inner surface of the through hole 22 and the outer surface of the cylindrical fastening member 23. A second communication hole 26 communicating only with Δ is formed. The resin 28 is filled in the gap Δ between the inner surface of the through hole 22 and the outer surface of the cylindrical fastening member 23 over almost the entire length of the cylindrical fastening member 23. Air is removed from the second communication hole, and suction is also possible. Therefore, it becomes easy to fill the resin 28 in the gap Δ over almost the entire length of the cylindrical fastening member 23, and a higher strength can be ensured compared to the configuration in which the resin 28 is filled in a part of the gap Δ.

(3) A thermosetting resin is used for the resin 28. Therefore, unlike the case where a thermoplastic resin is used as the resin 28, there is no possibility that the resin 28 is softened when the electric motor 10 is used.
(4) As a manufacturing process, the cylindrical fastening member 23 is passed through the through hole 22 with a gap Δ between the inner surface of the through hole 22 and the cylindrical fastening member 23, and both ends are sandwiched between both end plates 17. A step of arranging in a closed state. Moreover, it has the process which fills the inside of the cylindrical fastening member 23 with the resin 28 from the 1st communicating hole 25 in the state which has fluidity | liquidity, and supplies it to the clearance gap Δ from the hole 24 formed in the cylindrical fastening member 23. Then, after the resin 28 is filled in a portion of the gap Δ where the resin 28 is to be filled, the rotor 15 is manufactured through a step of curing the resin 28. Therefore, it is easy to fill the resin 28 into the gap Δ.

  (5) When the resin 28 is filled in the gap Δ, not only the resin is supplied in a pressurized state from the resin supply nozzle 32 but also the suction nozzle 33 applies a suction action to the gap Δ. Therefore, the resin 28 can easily enter the gap Δ as compared with the configuration in which the resin 28 enters the gap Δ only by the pressurization by the resin supply nozzle 32.

  (6) The hole 24 formed in the cylindrical fastening member 23 is formed at a position facing the end of the gap Δ in a state where the first end of the cylindrical fastening member 23 is fitted in the recess 27. Yes. Therefore, the resin 28 that enters the gap Δ from the inside of the cylindrical fastening member 23 through the hole 24 and fills the gap Δ easily fills the entire gap Δ.

  (7) The cylindrical fastening member 23 is sandwiched between the both end plates 17 in a state where the first end portion and the second end portion are fitted in the recesses 27 formed in the end plate 17 respectively. Therefore, the end plate 17 and the electromagnetic steel plate 16a are fastened in a predetermined positional relationship as compared with the configuration in which the first end portion and the second end portion are respectively sandwiched between the both end plates 17 in contact with the end plate 17. Becomes easier.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. In this embodiment, the resin 28 is applied to the entire gap between the point where the flux barrier 34 that also serves as a through hole through which the cylindrical fastening member 23 is inserted and the inner surface of the through hole and the cylindrical fastening member 23 is provided. The point that the resin 28 is filled in a part of the gap instead of being filled is greatly different from the first embodiment. The same parts as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 7, a flux barrier 34 is formed on the electromagnetic steel plate 16 a portion of the rotor core 16 on the outer peripheral side from the position where the permanent magnet 20 is embedded. The flux barrier 34 is formed in a substantially arc shape in which the shape on the permanent magnet 20 side has a substantially constant distance from the permanent magnet 20. The cylindrical fastening member 23 is inserted through the flux barrier 34 at the center of the flux barrier 34.

  FIG. 8 is a diagram schematically showing the inside of the flux barrier 34. As shown in FIG. 8, a plurality of partition plates 35 are provided in the flux barrier 34 so as to penetrate the cylindrical fastening member 23. The partition plate 35 is disposed in the flux barrier 34 in a state of being fixed at a predetermined position of the cylindrical fastening member 23. In this embodiment, two partition plates 35 are provided. A hole 24 is formed in the cylindrical fastening member 23 at a position corresponding to the space between the partition plates 35, and a resin 28 is filled between the partition plates 35 positioned so as to sandwich a portion where the hole 24 is provided. That is, the resin 28 is filled only in a portion sandwiched between the partition plates 35 in the gap Δ between the inner surface of the flux barrier 34 and the cylindrical fastening member 23. Moreover, the end plate 17 arrange | positioned among the pair of end plates 17 at the 2nd end part side of the cylindrical fastening member 23 is the state which abbreviate | omitted the 2nd communicating hole 26 from the end plate 17 of 1st Embodiment, That is, only the communication hole for resin supply is formed.

  When the rotor 15 having this configuration is manufactured, the rotor core 16 in which the electromagnetic steel plate 16 a having the flux barrier 34 is used as the electromagnetic steel plate 16 a instead of the through hole 22, and the end plate 17 is in the housing portion 31 of the jig 30. Placed in. Next, the cylindrical fastening member 23 to which the partition plate 35 is fixed at a predetermined position sandwiching the hole 24 is inserted into the flux barrier 34. The partition plate 35 is fixed to the cylindrical fastening member 23 with an adhesive, for example. Next, the end plate 17 from which the second communication hole 26 is omitted is arranged so that the recess 27 fits with the protruding end of the cylindrical fastening member 23.

  Next, resin is filled into the cylindrical fastening member 23 from the communication hole formed in the end plate 17 in a fluid state. The resin is filled into the cylindrical fastening member 23 from the bottom, and when filling proceeds to a position corresponding to the hole 24, the resin enters the gap Δ between the partition plates 35 through the hole 24, and the gap Δ Filled with resin. After an amount of time required for the amount of resin filled in the entire gap Δ between the partition plates 35, which is obtained in advance through experiments or the like, to be supplied from the resin supply nozzle 32, the resin is supplied from the resin supply nozzle 32. Stopped. Thereafter, a resin heat curing step is performed, and after the resin is cured, the rotor 15 is completed when the rotary shaft 18 is inserted and fixed out of the heating furnace. The electric motor 10 is manufactured by assembling the electric motor 10 using the rotor 15.

According to the second embodiment, the following effects can be obtained in addition to the effects (1), (3) and (7) of the first embodiment.
(8) The rotor core 16 is provided with a flux barrier 34 that also serves as a through hole through which the cylindrical fastening member 23 is inserted. Therefore, it is not necessary to form a dedicated through hole through which the cylindrical fastening member 23 is inserted.

  (9) A plurality of partition plates 35 are provided in the flux barrier 34 so as to penetrate the cylindrical fastening member 23, and holes 24 are formed in the cylindrical fastening member 23 at locations corresponding to the space between the partition plates 35. The resin 28 is filled between the partition plates 35 positioned so as to sandwich the portion where the hole 24 is provided. Therefore, the entire clearance gap Δ between the inner surface of the flux barrier 34 and the cylindrical fastening member 23 is not filled with resin, and a hole 24 is provided in the wall surface of the cylindrical fastening member 23 at a location sandwiched between the plurality of partition plates 35. It suffices to fill the resin only in the portion, and the resin is easily filled in the entire gap Δ to be filled, and the strength of the rotor 15 can be ensured even during high-speed rotation. In addition, the amount of resin 28 used can be reduced.

The embodiment is not limited to the above, and may be embodied as follows, for example.
In the configuration in which the resin 28 is filled in the gap Δ between the partition plates 35 as in the second embodiment, the position and number of the partition plates 35 may be changed. For example, as shown in FIG. 9A, a set of two partition plates 35 is provided at a plurality of locations on the cylindrical fastening member 23, and gaps Δ to be filled with the resin 28 are provided at a plurality of locations (in FIG. 9A). You may make it 2 places near both ends. In this case, the strength of the rotor 15 can be further increased.

  The position of the hole 24 formed in the cylindrical fastening member 23 in a state corresponding to the space between the two partition plates 35 is not limited to the position corresponding to the substantially center of the two partition plates 35, and FIG. As shown in FIG. 4, the partition plates 35 may be provided at positions close to each other. In this case, when the resin is filled, the resin enters the gap Δ from the hole 24 formed on the lower side of the gap Δ sandwiched between the pair of partition plates 35, and the gap Δ is filled from the lower side to remove the excess. The resin 28 is easily discharged from the upper hole 24 into the cylindrical fastening member 23.

  ○ In addition to fitting the end of the cylindrical fastening member 23 into the recess 27 of the end plate 17, as shown in FIG. 10, a top plate 36 is provided at the second end of the cylindrical fastening member 23. A screw hole 37 having a smaller diameter than the first communication hole 25 is formed in 36. Then, the end plate 17 may be tightened via a bolt 38 screwed into the screw hole 37. In this case, the force for fastening the rotor core 16 with the end plate 17 is increased.

  In the first embodiment and the second embodiment, the cylindrical fastening member 23 may be formed in a cylindrical shape in which both ends are opened instead of a bottomed cylindrical shape. Even in this case, if the end plate 17 is not provided with the first communication hole and the second communication hole and the first end portion of the cylindrical fastening member 23 is in contact with the end plate 17, the resin is filled in the gap Δ. The resin supplied into the cylindrical fastening member 23 enters the gap Δ from the hole 24 without hindrance, and the gap Δ is filled with the resin.

  The operation of filling the gap Δ with the resin is not limited to the method of sequentially performing each one on each cylindrical fastening member 23, but can be performed on a plurality of cylindrical fastening members 23 at the same time, or all the cylindrical fastening members. 23 may be performed simultaneously.

The number of the second communication holes 26 used for exerting a suction action on the gap Δ is not limited to one per gap Δ, and a plurality of second communication holes 26 may be provided.
(Circle) the position and the number of the holes 24 formed in the cylindrical fastening member 23 used in the first embodiment are not limited to being provided on the peripheral wall on the first end side. For example, a plurality may be provided at a position away from the first end, or the number may be one.

The resin 28 is not limited to a thermosetting resin, and may be a thermoplastic resin that does not soften due to heat generated when the electric motor 10 is driven.
(Circle) the cylindrical fastening member 23 should just be a cylindrical shape, and is not restricted to a cylindrical shape.

  ○ The permanent magnet 20 is not limited to one pole. For example, instead of providing one arc-shaped permanent magnet 20, two flat permanent magnets 20 may be arranged in a V shape, or one flat plate. The plate-like permanent magnets 20 may be arranged in a state orthogonal to the radial direction, and the plate-like permanent magnets 20 may be arranged on both sides thereof so as to extend obliquely toward the outer peripheral side.

Depending on the size of the rotor core 16, a plurality of layers of permanent magnets 20 may be provided so as to protrude toward the center of the rotor core 16.
The number of poles of the rotor 15 is not limited to four but may be an even number, but four or more are preferable, and are appropriately set according to the size of the rotor 15.

The motor 10 is not limited to a magnet-embedded motor, and may be applied to, for example, a reluctance motor, a surface magnet motor, or an induction motor.
○ It may be applied not only to motors but also to generators.

The following technical idea (invention) can be understood from the embodiment.
(1) In the invention according to any one of claims 1 to 4, the end plate is formed with a recess into which an end of a cylindrical fastening member is fitted, and the inside of the cylindrical fastening member The communication hole communicating with the is formed in the recess.

The schematic cross section of the rotary electric machine in 1st Embodiment. The schematic cross section which cut | disconnected the rotor at the boundary of a rotor core and an end plate. (A) is a model side view of a rotor, (b) is a model front view, (c) is a model side view of a cylindrical fastening member. (A) is a schematic diagram which shows the relationship between the both communicating holes and through-holes, and clearance gap which were formed in the end plate, (b) is a fragmentary sectional view in the BB line of (a). (A) is a schematic diagram in a state where one end plate and a rotor core are accommodated in a jig, and (b) is a schematic diagram in a state in which the other end plate is assembled. (A) is a schematic diagram in the state where the resin supply nozzle and the suction nozzle are mounted on the end plate, (b) is a schematic perspective view showing the movement path of the resin supplied to the cylindrical fastening member. The schematic cross section which cut | disconnected the rotor of 2nd Embodiment at the boundary of a rotor core and an end plate. The model perspective view which shows the relationship between a cylindrical fastening member, a flux barrier, and a partition plate. (A) is a schematic perspective view which shows arrangement | positioning of the partition plate in another embodiment, (b) is a schematic diagram which shows the relationship between the partition plate and hole in another embodiment. The fragmentary sectional view which shows the relationship between the end plate and cylindrical fastening member in another embodiment. The schematic diagram which shows the relationship between the fastening member of a prior art, and a through-hole.

Explanation of symbols

  Δ ... Gap, 10 ... Electric motor as rotating electric machine, 15 ... Rotor, 16 ... Rotor core, 16a ... Electromagnetic steel plate as magnetic plate, 17 ... End plate, 22 ... Through hole, 23 ... Cylinder fastening member, 24 ... Hole 25 ... 1st communication hole as a communication hole, 26 ... 2nd communication hole, 27 ... Recessed part, 28 ... Resin, 34 ... Flux barrier which also serves as a through-hole, 35 ... Partition plate.

Claims (5)

A rotor core in which a plurality of ferromagnetic magnetic plates are laminated;
A through hole formed in the rotor core so as to extend in the axial direction;
End plates disposed at both ends of the rotor core;
A cylindrical fastening member that is arranged through the through hole and fastens the magnetic plate in cooperation with the end plate, and has a wall formed with a hole,
A communication hole formed in one of the end plates and communicating with the inside of the cylindrical fastening member;
A rotating electrical machine comprising a rotor having a resin filling a gap between an inner surface of the through hole and the cylindrical fastening member.   The rotor core is provided with a flux barrier that also serves as the through-hole, and a plurality of partition plates are provided in the flux barrier so as to penetrate the cylindrical fastening member, and the partitioning member is provided on the cylindrical fastening member. 2. The rotating electrical machine according to claim 1, wherein the hole is formed at a location corresponding to between the plates, and the gap is filled with the resin between the partition plates positioned so as to sandwich a portion where the hole is provided. .   The hole is formed in the first end portion of the tubular fastening member, and the second end portion of the tubular fastening member is disposed on the end plate of the end plate that faces the second end portion of the tubular fastening member. Is formed, a first communication hole communicating with the inside of the cylindrical fastening member is formed at a position corresponding to the concave portion, and an inner surface of the through hole and an outer surface of the cylindrical fastening member The rotating electrical machine according to claim 1, wherein a second communication hole that communicates only with the gap is formed, and the resin is filled in the gap and the cylindrical fastening member.   The rotating electrical machine according to any one of claims 1 to 3, wherein the resin is a thermosetting resin. A rotor core in which a plurality of magnetic plates made of a ferromagnetic material are laminated, and end plates disposed at both ends of the rotor core, and disposed through a through hole formed in the rotor core so as to extend in the axial direction. And a cylindrical fastening member for fastening the magnetic plate in cooperation with the end plate, and a communication hole communicating with the inside of the cylindrical fastening member is formed in one of the end plates. A method of manufacturing a rotating electrical machine,
Arranging the cylindrical fastening member in a state of passing through the through hole in a state having a gap between the inner surface of the through hole and the cylindrical fastening member and having both ends sandwiched by the both end plates; Filling the inside of the cylindrical fastening member with resin from the communication hole in a fluid state and supplying the resin into the gap from a hole formed in the cylindrical fastening member; and filling the resin in the gap A method of manufacturing a rotating electrical machine, comprising: a step of manufacturing a rotor by a method including a step of curing the resin after the resin is filled in a power location.

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