JP2016096698A - Rotor manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotor manufacturing method capable of easily inserting a magnetic material into a magnetic insertion hole to a rotor core of which the magnetic insertion hole has a convex portion.SOLUTION: A magnetic insertion hole 4 of a rotor core 3 applied to a rotor manufacturing method, comprises: an inner side wall surface 4a that has convex parts 30 and 40; and a flat outer side surface 4b that is arranged opposite to the inner side wall surface 4a. By using the inner side wall surface 4a of such a shape, a magnetic material 5A is inserted into the magnetic insertion hole 4 along with the flat outer side surface 4b. By applying such a magnetic material insertion method, even if there are the convex parts 30 and 40 in the magnetic insertion hole 4, the magnetic material 5A can be easily, reliably, and smoothly inserted into the magnetic insertion hole 4 by utilizing gravity, without being disturbed by the convex parts 30 and 40.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a method for manufacturing a rotor in which magnets are loaded into magnet insertion holes of a rotor core formed by stacking laminated steel plates.

  Conventionally, as a technology in such a field, there is JP 2013-9452 A. In the rotor manufacturing method described in this publication, after inserting a magnet material into a slot portion (magnet insertion hole) of the rotor core, the magnet insertion hole is filled with resin and the magnet material is molded. Then, before the resin is filled, an electromagnet is used to bring the magnet material to the wall surface of the magnet insertion hole so that the resin is easily filled.

JP 2013-9452 A

In recent rotors, a configuration in which a magnet material is held by a convex portion provided in a slot portion (magnet insertion hole) of the rotor core has been devised, and by bringing a magnet into contact with the convex portion, Generation of eddy current is suppressed. (See Japanese Patent Application No. 2013-258711).
However, in such a rotor, since there is a convex portion in the magnet insertion hole, when the magnet material is inserted into the magnet insertion hole, the tip of the magnet material hits the convex portion, and the magnet material enters the magnet insertion hole. May be difficult to insert.

  An object of this invention is to provide the rotor manufacturing method which made it easy to insert a magnet raw material in a magnet insertion hole with respect to the rotor core in which the convex part was provided in the magnet insertion hole.

In the present invention, a magnet insertion hole extending in the rotation axis direction is provided, and a laminated steel plate projects from a rotor core laminated in the rotation axis extension direction and an inner wall surface forming a part of the magnet insertion hole. A rotor having a convex portion and a rod-shaped magnet material disposed in the magnet insertion hole, and filling the resin into the magnet insertion hole and molding the magnet material;
The magnet material is inserted into the magnet insertion hole along a flat outer wall surface disposed opposite to the inner wall surface in the magnet insertion hole.

  The magnet insertion hole of the rotor core applied to this rotor manufacturing method has an inner wall surface having a convex portion and a flat outer wall surface arranged to face the inner wall surface. Using the magnet insertion hole having such a shape, the magnet material is inserted into the magnet insertion hole along the flat outer wall surface. By applying such an insertion method, even if there is a convex portion in the magnet insertion hole, the magnet material can be easily and reliably inserted into the magnet insertion hole without being disturbed by the convex portion.

In addition, after setting the rotor core so that the rotation axis of the rotor core is horizontal, the rotor core is rotated by a predetermined angle around the rotation axis so that the inner wall surface is up and the outer wall surface is down. The magnet material is sequentially inserted into the magnet insertion holes in a state of being in contact.
If such a method is employ | adopted, a magnet raw material can be smoothly inserted in a magnet insertion hole using gravity.

The present invention is provided with a magnet insertion hole extending in the direction of the rotation axis, and a laminated steel plate protruding from a rotor core laminated in the direction of extension of the rotation axis and an outer wall surface forming a part of the magnet insertion hole. A rotor having a convex portion and a rod-shaped magnet material disposed in the magnet insertion hole, and filling the resin into the magnet insertion hole and molding the magnet material;
The magnet material is inserted into the magnet insertion hole along a flat inner wall surface disposed opposite to the outer wall surface in the magnet insertion hole.

  The magnet insertion hole of the rotor core applied to this rotor manufacturing method has the outer wall surface which has a convex part, and the flat inner wall surface arrange | positioned facing the outer wall surface. Using the magnet insertion hole having such a shape, the magnet material is inserted into the magnet insertion hole along the flat inner wall surface. By applying such an insertion method, even if there is a convex portion in the magnet insertion hole, the magnet material can be easily and reliably inserted into the magnet insertion hole without being disturbed by the convex portion.

In addition, after setting the rotor core so that the rotation axis of the rotor core is horizontal, the rotor core is rotated by a predetermined angle around the rotation axis so that the outer wall surface is up and the inner wall surface is down. The magnet material is sequentially inserted into the magnet insertion holes in a state of being in contact.
If such a method is employ | adopted, a magnet raw material can be smoothly inserted in a magnet insertion hole using gravity.

  According to the present invention, it is easy to insert a magnet material into a magnet insertion hole with respect to a rotor core provided with a convex portion in the magnet insertion hole.

It is a top view which shows one Embodiment of the rotor with which the rotor manufacturing method which concerns on this invention was applied. (A) is a principal part enlarged plan view of a rotor core, (b) is a principal part enlarged plan view of a rotor. It is a longitudinal cross-sectional view of a rotor. It is sectional drawing which shows the resin filling apparatus which makes a part of rotor manufacturing apparatus. It is sectional drawing which shows the manufacturing process of a rotor. It is sectional drawing which shows the manufacturing process of a rotor. It is sectional drawing which shows the manufacturing process of a rotor. It is sectional drawing which shows the magnet raw material insertion apparatus which makes a part of rotor manufacturing apparatus. It is sectional drawing which shows a magnet raw material insertion process. It is sectional drawing which shows a magnet raw material insertion process. It is a top view which shows the state in which a magnet raw material is sequentially loaded in the lowermost magnet insertion hole. It is a principal part enlarged plan view which shows the other example of a rotor core.

  Hereinafter, preferred embodiments of a rotor manufacturing method according to the present invention will be described in detail with reference to the drawings.

  The rotor 1 shown in FIGS. 1 and 2 is used as a motor or generator for driving a hybrid vehicle. In addition to hybrid vehicles, it is also used for electric vehicles and fuel cell vehicles.

  The rotor 1 includes a rotor core 3 (see FIG. 3) in which a thin laminated steel plate 2 formed by punching a steel plate with an insulating coating into a disk shape and laminated in the extending direction of the rotation axis L, and a magnet insertion hole formed in the rotor core 3. 4 and a magnet 5 arranged in 4. In the center of the rotor core 3, an opening 8 for inserting the rotary shaft 7 is formed. A key 8 a is formed so as to protrude from the peripheral edge of the opening 8 toward the rotation axis L, and the key 8 a is fitted into a key groove 7 a formed in the rotary shaft 7. Two pairs of keys 8a are arranged with a phase angle of 180 degrees. In addition, by punching the steel sheet with the insulating coating, the insulating coating peels off at the cut surface, and the steel material is exposed.

  In the rotor 1, S poles and N poles appear alternately in the circumferential direction, and four magnets 5 a to 5 d are arranged in the magnet insertion hole 4 in each pole. The magnet insertion hole 4 provided for each pole is a slit-shaped first magnet insertion hole 10 and second magnet insertion hole 20 that are inclined from the outside to the inside. It is formed in an inverted C shape having R. Each magnet insertion hole 10, 20 is formed by stamping.

  The first magnet insertion hole 10 is provided with first and second magnets 5a and 5b having a rectangular cross section, and the second magnet insertion hole 20 has a second bar having a rectangular cross section. 3 and 4th magnets 5c and 5d are arranged. The first magnet 5a and the second magnet 5b that are divided in order to reduce generation of eddy currents between the magnets are molded in a contact state, and in the first magnet insertion hole 10 in an integrated state. Is loaded. Similarly, the third magnet 5c and the fourth magnet 5d divided in order to reduce the generation of eddy current between the magnets are similarly loaded in the second magnet insertion hole 20. The first to fourth magnets 5a to 5d are magnetized to the same polarity, and the magnet 5 in the inverted V-shaped magnet insertion hole 4 has the same polarity.

  As shown in FIG. 2, the first magnet insertion hole 10 of the rotor core 3 includes a first magnet insertion half S <b> 1 located on the outer side and a second magnet insertion half S <b> 2 located on the inner side. The first magnet 5a is disposed in the first magnet insertion half S1, and the second magnet 5b is disposed in the second magnet insertion half S2. Similarly, the second magnet insertion hole 20 includes a third magnet insertion half S3 located on the inner side and a fourth magnet insertion half S4 located on the outer side. The third magnet 5c is disposed in the third magnet insertion half S3, and the fourth magnet 5d is disposed in the fourth magnet insertion half S4.

  As shown in FIGS. 2 and 3, the rotor core 3 is formed with a convex portion 30 protruding from the inner wall surface 10 a of the first magnet insertion hole 10 extending in the direction of the rotation axis L. The protrusions 30 are arranged in a stepped manner in the circumferential direction of the rotor core 3 so as not to overlap in the extending direction of the rotation axis L. The protrusion 40 protruding from the second magnet insertion hole 20 also protrudes from the inner wall surface 20a, and the protrusion 40 is disposed so as not to overlap the protrusion 30 in the circumferential direction. By such an arrangement of the convex portions 30 and 40, the eddy current loss occurring in the direction of the rotation axis L in the rotor core 3 is reduced.

  Next, the rotor manufacturing apparatus 50 will be described.

  As shown in FIG. 4, the resin filling device 50 </ b> A that forms a part of the rotor manufacturing device 50 is in contact with the lower mold 51 that supports the circular lower end surface 3 a of the rotor core 3 and the circular upper end surface 3 b of the rotor core 3. And an upper mold 52 that can be moved up and down. The lower die 51 is erected at the center thereof, and is composed of a column portion 51 a that is inserted into the opening 8 of the rotor core 3 and a base portion 51 b that supports the lower end surface 3 a of the rotor core 3. In the base portion 51b, a donut plate-like magnetic body portion A is disposed on the inner portion with the magnet insertion hole 4 as a boundary at the lower end surface 3a of the rotor core 3, and a donut plate-like non-magnetic body portion is disposed on the outer portion. B is arranged.

  The magnetic part A is formed integrally with the support column 51a and abuts against the lower end surface 3c of the inner part P1 with the magnet insertion hole 4 as a boundary by the rotor core 3. Donut-shaped electromagnets 53 and 54 are embedded vertically in the column portion 51a made of a magnetic material. The rotor core 3 is magnetized by the electromagnets 53 and 54.

  Further, the non-magnetic part B is in contact with the lower end surface 3d of the outer part P2 at the rotor core 3 with the magnet insertion hole 4 as a boundary. As a result, the lines of magnetic force generated from the electromagnet 53 do not reach the non-magnetic part B and form a magnetic path that passes through the inner part P1 of the rotor core 3 and the magnetic part A.

  The upper mold 52 includes a base portion 52a that contacts the upper end surface 3b of the rotor core 3, and an upper plate portion 52b that is fixed to the upper surface of the base portion 52a and is made of a nonmagnetic material. In the base portion 52a, a donut plate-like magnetic body portion A is arranged on the inner side with the upper end surface 3b of the rotor core 3 as a boundary, and a donut plate-like non-magnetic body portion is arranged on the outer side portion. B is arranged.

  This magnetic part A is in contact with the upper end surface 3e of the inner part P1 at the rotor core 3 with the magnet insertion hole 4 as a boundary. Further, the non-magnetic part B is in contact with the upper end surface 3f of the outer portion P2 of the rotor core 3 with the magnet insertion hole 4 as a boundary. As a result, the lines of magnetic force generated from the electromagnet 54 do not reach the nonmagnetic part B, and form a magnetic path that passes through the inner part P1 of the rotor core 3 and the magnetic part A. The boundary E1 between the magnetic part A and the nonmagnetic part B has a star shape as indicated by a two-dot chain line in FIG.

  The base portion 52a is provided with a resin injection hole 55 communicating with the magnet insertion hole 4. The resin injection hole 55 includes an outer wall surface 4b disposed opposite to the inner wall surface 4a of the magnet insertion hole 4 and a magnet material 5A. Is formed at a position where the resin G is pressurized and filled into the gap D between the two. The gap D appears reliably in a state in which the magnet material 5A is attracted to the convex portions 30 and 40 formed on the inner wall surface 4a of the magnet insertion hole 4 by a magnetic force.

  A cylinder 56 provided with a resin reservoir 56a communicating with the resin injection hole 55 is fixed to the upper plate portion 52b. The resin G fluidized in the resin reservoir 56a is pumped into the magnet insertion hole 4 through the resin injection hole 55 by the plunger 59.

  A method for manufacturing the rotor 1 by the above-described rotor manufacturing apparatus 50 will be described below.

  As shown in FIG. 5A, first, the rotor core 3 is set on the lower mold 51 such that the support column 51 a of the lower mold 51 is inserted into the opening 8 of the rotor core 3. At this time, the magnetic part A of the lower mold 51 abuts on the inner part P <b> 1 of the rotor core 3, and the non-magnetic part B abuts on the outer part P <b> 2 of the rotor core 3.

  After that, as shown in FIG. 5B, the lower mold 51 is set up so that the rotation axis L of the rotor core 3 is horizontal, and the magnet insertion hole 4 of the rotor core 3 is set in a horizontal state. At this time, in the magnet insertion hole 4 positioned at the lowermost part of the rotor core 3, the protrusions 30 and 40 formed on the inner wall surface 4 a are positioned above and are disposed to face the inner wall surface 4 a of the magnet insertion hole 4. The flat outer wall surface 4b is positioned below.

  This lowermost magnet insertion hole 4 has a flat outer wall surface 4b with no irregularities positioned below, so that the magnet material 5A that is affected by gravity during insertion can be smoothly inserted along the outer wall surface 4b. 4 can be inserted. Accordingly, the magnet material 5A is sequentially loaded into the magnet insertion holes 4 appearing at the lowermost portion of the rotor core 3 while rotating the lower mold 51 around the rotation axis L. In this way, the magnet material 5A is loaded into all the magnet insertion holes 4.

  The process shown in FIG. 5B is performed by a magnet material insertion device 50B that forms part of the rotor manufacturing apparatus 50, and the magnet material insertion device 50B will be described later.

  Thereafter, as shown in FIG. 5C, the lower mold 51 is returned to the original state so that the rotation axis L extends in the vertical direction. In this state, the heating device 57 is arranged around the rotor core 3, and the rotor core 3 is high-frequency heated to a predetermined temperature (for example, around 180 degrees) by the coil of the heating device 57. The heating device 57 may be a heating furnace.

  Thereafter, as shown in FIG. 6A, the upper mold 52 is brought into contact with the upper end surface 3 b of the heated rotor core 3. At this time, the magnetic part A of the upper mold 52 is in contact with the inner part P1 of the rotor core 3 and the non-magnetic part B is in contact with the outer part P2 of the rotor core 3. Then, the upper mold 52 and the lower mold 51 are closed with a predetermined pressure. After the mold is closed, the electromagnets 53 and 54 are energized, and the magnetic lines of force generated from the electromagnets 53 and 54 do not reach the nonmagnetic body part B, but pass through a magnetic path passing through the inner part P1 of the rotor core 3 and the magnetic body part A. Then, the magnet material 5A is drawn to the tips of the convex portions 30 and 40 of the rotor core 3 (see FIG. 4).

  In this case, the magnetic body portion A can be used as a yoke, and the magnetic force can be concentrated on the inner portion P1 of the rotor core 3 with the magnet insertion hole 4 as a boundary. As a result, by simply loading the magnet material 5 </ b> A into the rotor core 3, the magnet material 5 </ b> A presenting a disparate position in the magnet insertion hole 4 can be reliably brought into contact with the convex portions 30 and 40.

  Thereafter, thermosetting resin pellets 58 are loaded into the resin reservoir 56a, and as shown in FIG. 6B, the resin pellets 58 are heated and softened by the resin reservoir 56a, and further heated plunger 59 While melting the resin pellet 58, the gap G between the outer wall surface 4b of the magnet insertion hole 4 of the rotor core 3 heated by the heating device 57 and the magnet material 5A is filled with the resin G by the pressing force of the plunger 59. Then, as shown in FIG. 6C, the inside of the magnet insertion hole 4 is filled with the resin G, the pressure of the plunger 59 is maintained, and the resin G is cured.

  When such a method is adopted, since the outer wall surface 4b of the magnet insertion hole 4 does not have the convex portions 30 and 40, the gap G between the magnet insertion hole 4 and the magnet material 5A can be easily filled with the resin G. As a result, reliable and uniform resin filling can be performed. And the filling pressure by resin filling is reliably applied in the direction in which the magnet material 5A is pressed against the convex portions 30 and 40, and the contact between the magnet material 5A and the convex portions 30 and 40 can be made more reliable. By the reliable resin filling, the centrifugal force of the magnet 5 generated by the rotation of the rotor 1 can be reliably received by the resin E, and the magnet 5 can be prevented from being damaged.

  After the resin is cured, the electromagnets 53 and 54 are turned off. Thereafter, the upper mold 52 is removed as shown in FIG. 7A, and the lower mold 51 is removed as shown in FIG. 7B. Thereafter, the excess resin G protruding from the rotor core 3 is deburred and the gate is removed, and the rotor core 3 is cooled.

  And in order to complete the rotor 1, the rotating shaft 7 and the resolver are assembled | attached to the rotor core 3 shown by FIG. 7, and the magnet raw material 5A is magnetized.

  In this rotor manufacturing method, the magnet material 5A can be brought into contact with the convex portions 30 and 40 by applying a magnetic force to the inner portion P1 with the magnet insertion hole 4 as a boundary in the rotor core 3, but all the magnet materials In order to bring 5A into contact with the protrusions 30 and 40 with certainty, the non-magnetic part B is brought into contact with the outer portion P2 of the rotor core 3 with the magnet insertion hole 4 as a boundary. By adopting such a configuration, the magnetic force does not go around to the outside of the rotor core 3, so that it is possible to reliably avoid contact between the outer wall surface 4b of the magnet insertion hole 4 and the magnet material 5A due to the magnetic force. As a result, in the rotor core 3 in which the convex portions 30 and 40 are provided in the magnet insertion hole 4, the magnet material 5A can be reliably brought into contact with the convex portions 30 and 40, and eddy current can be reduced. The original functions of the intended convex portions 30 and 40 can be exhibited. Further, the magnet material 5A can be reliably moved inward in the magnet insertion hole 4, and the uniform arrangement of the magnet materials 5A has an effect of improving the rotation balance of the rotor 1.

  Here, the magnet material insertion device 50B used in the process shown in FIG. 5B will be described in detail.

  As shown in FIG. 8, in the magnet material insertion device 50B, the lower mold 51 is detachably set, and the swing base 70 that allows the lower mold 51 to rise 90 degrees and the magnet material 5A are vertically arranged. The magazine part 71 that is stocked in a stacked state and always biases the stocked magnet material 5A from below, and the lower mold 51 set on the swing base 70 and the magazine part 71 in the horizontal direction. A reciprocating magnet material transfer table 72, a mounting table 74 provided with a guide rail 73 for guiding the magnet material transfer table 72 in the horizontal direction, and a magnet material 5A positioned at the top of the magazine portion 71 are pushed out in the horizontal direction. 1 actuator 76, a second actuator 77 that enables the swing base 70 to rise 90 degrees, and a third actuator 78 that rotates the lower mold 51. That.

  The first actuator 76 is a piston cylinder mechanism, and the uppermost magnet material 5A is pushed out of the magazine portion 71 by a piston 76a that reciprocates in the horizontal direction, and a magnet material transfer table through a stopper (not shown). 72 is set. The magnet material transfer table 72 can be moved back and forth in the horizontal direction along the guide rail 73 by an actuator (not shown).

  The second actuator 77 is a motor that rotates the rotating shaft of the mounting bracket 80 provided on the mounting base 74. The oscillating base 70 connected to the mounting base 74 via the mounting bracket 80 can be rotated between a horizontal set state and a vertical set state by driving a motor 77.

  The third actuator 78 is a motor fixed to the swing base 70. A rotation shaft 78 a of the motor 78 passes through the swinging base 70 and is spline-engaged in the center hole 51 c of the lower mold 51. The lower mold 51 set on the swing table 72 can be stopped at every predetermined rotation angle by driving a motor 78.

  Next, a magnet material insertion method using the magnet material insertion device 50B will be described.

  First, as shown in FIG. 8, a lower mold 51 is prepared in which a column 51 a of a lower mold 51 is inserted into the opening 8 of the rotor core 3 and is key-connected. In addition, you may connect the rotor core 3 and the lower mold | type 51 via a clamp member.

  Thereafter, the rotary shaft 78 a of the motor 78 is inserted into the center hole 51 c of the lower mold 51, the rotary shaft 78 a and the center hole 51 c are spline-engaged, and the lower mold 51 is set on the swing table 70.

  Thereafter, as shown in FIG. 9A, the motor 77 is driven to rotate the swing table 70 by 90 degrees so that the swing table 70 changes from the horizontal set state to the vertical set state. As a result, the lower mold 51 rises so that the rotation axis L of the rotor core 3 is horizontal, and the magnet insertion hole 4 of the rotor core 3 becomes horizontal. At this time, in the magnet insertion hole 4 positioned at the lowermost part of the rotor core 3, the protrusions 30 and 40 formed on the inner wall surface 4 a are positioned above and are disposed to face the inner wall surface 4 a of the magnet insertion hole 4. The flat outer wall surface 4b is positioned below.

  Thereafter, the magnet material 5 </ b> A is pushed out of the magazine portion 71 by the piston 76 a and set on the magnet material transfer table 72. The magnet material 5A set on the magnet material transfer table 72 via a stopper (not shown) is moved to the vicinity of the lower die 51 together with the advance of the magnet material transfer table 72 by an actuator (not shown). Moving.

  As shown in FIG. 9B and FIG. 11A, the piston 76 a is further protruded, and the magnet material 5 </ b> A is inserted into the magnet insertion hole 4. At this time, the flat outer wall surface 4b of the lowermost magnet insertion hole 4 and the magnet placement surface 72a of the magnet material transfer table 72 are flush with each other in the horizontal direction. 5A can be smoothly inserted into the magnet insertion hole 4 along the outer wall surface 4b.

  When the insertion of the magnet material 5A into the lowermost magnet insertion hole 4 is completed, the motor 78 is driven to rotate the lower mold 51 by a predetermined angle, and the empty magnet insertion hole 4 waiting next is moved to the lowermost part. To stop the driving of the motor 78 (see FIG. 11B). At this time, the magnet material transfer table 72 is moved back to the vicinity of the magazine portion 71 by an actuator (not shown). Then, the magnet material 5A is pushed out from the magazine portion 71 by the piston 76a and set on the magnet material transfer table 72, and the magnet material 5A is sequentially inserted into the lowermost magnet insertion hole 4 by a series of operations as described above. The magnet material 5A is loaded into all the magnet insertion holes 4.

  After the filling of the magnet material 5A is completed, as shown in FIG. 10, the motor 77 is driven to rotate the rocking table 70 by 90 degrees so that the rocking table 70 changes from the vertical setting state to the horizontal setting state. . As a result, the lower mold 51 returns to the original position so that the rotation axis L of the rotor core 3 extends in the vertical direction. Thereafter, the lower mold 51 is removed from the swing table 70, and the lower mold 51 is moved to the next step.

  The magnet insertion hole 4 of the rotor core 3 applied to this rotor manufacturing method has an inner wall surface 4a having convex portions 30 and 40, and a flat outer wall surface 4b arranged to face the inner wall surface 4a. Yes. Using the magnet insertion hole 4 having such a shape, the magnet material 5A is inserted into the magnet insertion hole 4 along the flat outer wall surface 4b. By applying such a magnet material insertion method, even if the convex portions 30 and 40 are present in the magnet insertion hole 4, the magnet material 5 </ b> A is inserted into the magnet insertion hole 4 without being obstructed by the convex portions 30 and 40. It can be inserted easily, reliably and smoothly using gravity.

  The present invention is not limited to the above-described embodiment, and various modifications as described below are possible without departing from the gist of the present invention.

  As a rotor of another modified example, as shown in FIG. 12, convex portions 30 and 40 may be formed on the outer wall surface 4 b that forms a part of the magnet insertion hole 4. In this case, in the magnet insertion hole 4 located at the uppermost part of the rotor core 3, the protrusions 30 and 40 formed on the outer wall surface 4 b are positioned above and are arranged to face the outer wall surface 4 b of the magnet insertion hole 4. The flat inner wall surface 4a thus formed is in a state positioned below. Therefore, by using the magnet material insertion device 50B, the magnet material 5A is sequentially inserted into the uppermost magnet insertion hole 4, and the magnets are inserted into all the magnet insertion holes 4 while rotating the rotor core 3 by a predetermined angle. The material 5A is loaded.

  The magnet insertion hole 4 of the rotor core 3 applied to this rotor manufacturing method has an outer wall surface 4b having convex portions 30 and 40, and a flat inner wall surface 4a arranged to face the outer wall surface 4b. Yes. Using the magnet insertion hole 4 having such a shape, the magnet material 5A is inserted into the magnet insertion hole 4 along the flat inner wall surface 4a. By applying such a magnet material insertion method, even if the convex portions 30 and 40 are present in the magnet insertion hole 4, the magnet material 5 </ b> A is inserted into the magnet insertion hole 4 without being obstructed by the convex portions 30 and 40. It can be inserted easily, reliably and smoothly using gravity.

  A ... Magnetic body part B ... Non-magnetic body part D ... Gap E1 ... Boundary E2 ... Boundary G ... Resin L ... Rotational axis P1 ... Inner part P2 ... Outer part 1 ... Rotor 2 ... Laminated steel sheet 3 ... Rotor core 4 ... Magnet insertion hole 4a ... Inner wall surface 4b ... Outer wall surface 5 ... Magnet 5A ... Magnet material 30, 40 ... Convex part 50 ... Rotor manufacturing device 50A ... Resin filling device 50B ... Magnet material insertion device 51 ... Lower die 51a ... Strut portion 52 ... Upper die 53 , 54 ... Electromagnet 57 ... Heating device 60 ... Rotor manufacturing device 61, 62 ... Electromagnet 63 ... Rotor manufacturing device 64, 65 ... Electromagnet

Claims (4)

A magnet insertion hole extending in the direction of the rotation axis is provided, a rotor core in which the laminated steel plates are stacked in the direction of extension of the rotation axis, and a protrusion protruding from the inner wall surface forming a part of the magnet insertion hole, A rod-shaped magnet material disposed in the magnet insertion hole, and a rotor in which resin is filled in the magnet insertion hole and the magnet material is molded,
The magnet material is inserted into the magnet insertion hole along a flat outer wall surface disposed opposite to the inner wall surface in the magnet insertion hole.
Rotor manufacturing method. After setting the rotor core so that the rotation axis of the rotor core is horizontal, the rotor core is rotated by a predetermined angle around the rotation axis so that the inner wall surface is up and the outer wall surface is down. Sequentially inserting the magnet material into the magnet insertion hole in a state;
The rotor manufacturing method according to claim 1. A magnet insertion hole extending in the rotation axis direction is provided, a rotor core in which the laminated steel plates are stacked in the extension direction of the rotation axis, and a protrusion protruding from an outer wall surface forming a part of the magnet insertion hole, A rod-shaped magnet material disposed in the magnet insertion hole, and a rotor in which resin is filled in the magnet insertion hole and the magnet material is molded,
The magnet material is inserted into the magnet insertion hole along a flat inner wall surface disposed opposite to the outer wall surface in the magnet insertion hole.
Rotor manufacturing method. After setting the rotor core so that the rotation axis of the rotor core is horizontal, the rotor core is rotated by a predetermined angle around the rotation axis so that the outer wall surface is up and the inner wall surface is down. Sequentially inserting the magnet material into the magnet insertion hole in a state;
The rotor manufacturing method according to claim 3.

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