JP6749411B2 - Armature of rotating electric machine, rotating electric machine, hoisting machine for elevator, and method of manufacturing armature - Google Patents

Description

The present invention relates to an armature of a rotary electric machine having a plurality of split iron cores arranged in an annular shape, a rotary electric machine, a hoisting machine for an elevator, and a method for manufacturing the armature.

Conventionally, an outer rotor type rotating electric machine in which a stator, which is an armature, is arranged inside an annular rotor is known. In the outer rotor type rotary electric machine, coils are individually provided on a plurality of teeth that respectively protrude outward in the radial direction from the back yoke of the armature core.

Conventionally, in order to increase the number of turns when winding the conductor wire of the coil around the teeth, the armature cores were not integrally formed, but a plurality of segmented cores with teeth were individually manufactured and each segmented core was connected in an annular shape. An armature iron core has been proposed. Each of the split cores is provided with a recess and a protrusion. The split iron cores adjacent to each other are connected in a state in which the recesses of one split core and the projections of the other split core are fitted together. In such a conventional armature iron core, the conductor wire of the coil can be wound around the tooth in a state where the respective split iron cores are separated from each other, and the number of turns of the coil can be increased (for example, see Patent Document 1).

JP, 2007-159170, A

However, in the conventional rotary electric machine shown in Patent Document 1, after the coils are provided on the teeth of each of the split cores, the recesses and the projections must be press-fitted to connect the split cores. It takes time and effort to assemble the armature core.

The present invention has been made to solve the above problems, and obtains an armature for a rotating electric machine, a rotating electric machine, an elevator hoisting machine, and a method for manufacturing an armature that can be easily manufactured. The purpose is to

An armature of a rotating electric machine according to the present invention includes an annular armature core having a plurality of divided iron cores arranged in the circumferential direction, and a resin-made molded body provided across adjacent divided iron cores. , A back yoke portion and a tooth portion that projects radially outward from the back yoke portion, each back yoke portion is provided with a first through hole, and the molded body has an axial line of the split core. The first forming part provided on one end face in the direction, the second forming part provided on the other end face in the axial direction of the split iron core, and the first forming part and the second forming part provided on the first through hole. And a connecting portion provided between the molding portions.

According to the armature of the rotating electric machine, the rotating electric machine, the elevator hoisting machine, and the method of manufacturing the armature according to the present invention, it is possible to prevent the split iron cores from separating from each other by the molded body. Therefore, it is possible to reduce the labor of the work of connecting the plurality of divided iron cores to each other. Further, by only injecting the resin from one side in the axial direction of the split core, the resin can reach both sides in the axial direction of the split core through the first through holes. Thereby, the molded body can be easily provided on each of the axial direction one end surface and the axial direction other end surface of the split iron core. Because of this, the armature of the rotating electric machine, the rotating electric machine, and the hoisting machine for an elevator can be easily manufactured.

1 is a cross-sectional view showing an elevator hoisting machine according to Embodiment 1 of the present invention. It is an expanded sectional view which shows the principal part of the elevator hoisting machine of FIG. It is a perspective view which shows the armature of FIG. It is a front view which shows the armature of FIG. It is a front view which shows the armature core of FIG. It is a block diagram which shows the state when providing a coil in the split iron core connection body of FIG. FIG. 6 is a front view showing another example of the armature of the elevator hoisting machine according to Embodiment 1 of the present invention. FIG. 6 is a front view showing an armature of an elevator hoisting machine according to Embodiment 2 of the present invention. FIG. 9 is a sectional view taken along line IX-IX in FIG. 8. It is sectional drawing which shows the armature of FIG. It is a front view which shows the armature of the elevator hoisting machine by Embodiment 3 of this invention. It is a rear view which shows the armature of FIG. It is sectional drawing which followed the XIII-XIII line of FIG. It is sectional drawing which followed the XIV-XIV line of FIG. It is a front view which shows the armature iron core of FIG.

Embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1.
1 is a sectional view showing an elevator hoisting machine according to Embodiment 1 of the present invention. FIG. 2 is an enlarged cross-sectional view showing a main part of the elevator hoisting machine of FIG. In the figure, an elevator hoisting machine 1 has a motor 2 which is a rotary electric machine, and a sheave 3 provided on the motor 2. A plurality of ropes for suspending a car and a counterweight are wound around the outer periphery of the sheave 3. Further, on the outer peripheral portion of the sheave 3, a plurality of grooves into which ropes are fitted are provided along the circumferential direction of the sheave 3.

The motor 2 is provided in the housing 6, a cylindrical armature 4 as a stator, a cylindrical rotor 5 rotatable with respect to the armature 4, a housing 6 supporting the armature 4 and the rotor 5, and a housing 6. It has a brake 7 that applies a braking force to the rotor 5, and a rotation detector 8 that detects the rotational position of the rotor 5 with respect to the armature 4.

The housing 6 includes a main shaft 6a arranged coaxially with the axis of the motor 2, a cylindrical outer cylinder portion 6b surrounding the main shaft 6a, and a cylinder arranged between the main shaft 6a and the outer cylinder portion 6b. The inner cylindrical portion 6c. The outer cylinder portion 6b and the inner cylinder portion 6c are arranged coaxially with the main shaft 6a.

The armature 4 is arranged in the space between the outer tubular portion 6b and the inner tubular portion 6c. The inner peripheral surface of the armature 4 is fitted on the outer peripheral surface of the inner cylindrical portion 6c. The armature 4 is fixed to the housing 6 by a plurality of bolts 10. In this example, a hexagon socket head cap screw is used as the bolt 10.

The rotor 5 has a rotor main body 51 rotatably attached to the main shaft 6 a via bearings 9, and a plurality of permanent magnets 52 fixed to the rotor main body 51.

The rotor body 51 has a tubular small diameter portion 51a, a tubular large diameter portion 51b having an outer diameter larger than that of the small diameter portion 51a, and a connecting portion 51c connecting the small diameter portion 51a and the large diameter portion 51b. ing.

The bearing 9 is fitted between the main shaft 6a and the small diameter portion 51a. Therefore, the inner ring of the bearing 9 is fitted on the outer peripheral surface of the main shaft 6a, and the outer ring of the bearing 9 is fitted on the inner peripheral surface of the small diameter portion 51a of the rotor body 51. The sheave 3 is fixed to the rotor body 51 while being fitted to the outer peripheral surface of the small diameter portion 51a. The sheave 3 rotates integrally with the rotor body 51 about the axis of the main shaft 6a.

The large diameter portion 51b is arranged in the space between the outer cylinder portion 6b and the armature 4. The plurality of permanent magnets 52 are circumferentially arranged and fixed on the inner peripheral surface of the large diameter portion 51b. As a result, the plurality of permanent magnets 52 are arranged radially outside the armature 4. In addition, the plurality of permanent magnets 52 are arranged with a gap with the armature 4.

The brake 7 is arranged radially outside the large diameter portion 51b of the rotor body 51. Further, the brake 7 has a brake pad (not shown) that is a braking member that comes into contact with the outer peripheral surface of the large diameter portion 51b or separates from the outer peripheral surface of the large diameter portion 51b. The braking force for braking the rotation of the rotor 5 and the sheave 3 is applied to the rotor 5 and the sheave 3 when the brake pad contacts the outer peripheral surface of the large diameter portion 51b. Further, the braking force applied to the rotor 5 and the sheave 3 disappears as the brake pad moves away from the outer peripheral surface of the large diameter portion 51b.

The rotation detector 8 has a detector stator 81 attached to the main shaft 6a and an annular detector rotor 82 attached to the small diameter portion 51a of the rotor body 51. The detector stator 81 is arranged inside the detector rotor 82. The detector stator 81 detects the rotational position of the detector rotor 82 as the rotational position of the rotor 5. Information on the rotational position of the rotor 5 is sent from the rotation detector 8 to, for example, a control device that controls the operation of the elevator.

FIG. 3 is a perspective view showing the armature 4 of FIG. FIG. 4 is a front view showing the armature 4 of FIG. Further, FIG. 5 is a front view showing the armature core 41 of FIG. 2 is a cross-sectional view taken along the line II-II in FIG. The armature 4 includes a ring-shaped armature core 41, a plurality of coils 42 provided on the armature core 41, and a resin made of a resin provided on the armature core 41 radially inward of the plurality of coils 42. And a molded body 43.

The armature core 41 has a plurality of split cores 45 arranged in the circumferential direction. In this example, as shown in FIG. 5, a split iron core connected body 44 is configured by connecting six split iron cores 45, and an annular armature is formed by connecting the three split iron core connected bodies 44 in an annular shape. The iron core 41 is configured. Therefore, in this example, 18 armature cores 45 are included in one armature core 41.

Each of the split iron cores 45 has a flat back yoke portion 46 and a tooth portion 47 that protrudes radially outward from an intermediate portion of the back yoke portion 46. The plurality of split iron cores 45 are arranged in an annular shape with the back yoke portions 46 being sequentially connected. The inner peripheral surface of the armature core 41 is formed by the back yoke portion 46 of each split iron core 45.

A coil 42 is provided in each tooth portion 47. Each coil 42 is provided in the tooth portion 47 in a state where the conductor wire of the coil 42 is wound around the tooth portion 47.

As shown in FIGS. 2 and 3, each of the split iron cores 45 has a plurality of plate-shaped core pieces 45a stacked in the axial direction of the main shaft 6a. Both end portions in the circumferential direction of each core piece 45a in the back yoke portion 46 of each split iron core 45 are connection end portions. In the armature iron core 41, as shown in FIG. 3, among the back yoke portions 46 of the split iron cores 45 adjacent to each other, the connecting end portion of the core piece 45a of one back yoke portion 46 and the other back yoke portion. The connecting ends of the core pieces 45a of the portion 46 are alternately overlapped in the axial direction, and the overlapping connecting ends are connected to each other so as to be rotatable about the axis of the connecting shaft 101. That is, the split iron cores 45 adjacent to each other are connected so as to be rotatable about the axis of the connecting shaft 101 along the stacking direction of the core pieces 45a. In this example, the back yoke portions 46 of the split iron cores 45 that are adjacent to each other are coupled to each other by the coupling shafts 101 that penetrate the coupling end portions of the plurality of core pieces 45a that are alternately overlapped.

As shown in FIG. 5, a first through hole 103 and a second through hole 102 different from the first through hole 103 are provided in each of the back yoke portions 46 of each of the split iron cores 45. The first through hole 103 and the second through hole 102 penetrate the back yoke portion 46 along the stacking direction of the core pieces 45a. In this example, the first through hole 103 is separated from the second through hole 102. Further, in this example, the inner diameter of the first through hole 103 is smaller than the inner diameter of the second through hole 102. Further, in this example, the second through hole 102 is located radially inward of the first through hole 103.

Of the plurality of second through holes 102, a specific second through hole 102 is a bolt through hole. The bolt 10 fixed to the housing 6 is passed through the specific second through hole 102 as a bolt through hole. In this example, as shown in FIG. 3 and FIG. 4, among the 18 second through holes 102 provided in each of the split iron cores 45, 6 second through holes 102 are bolt through holes. It has become.

As shown in FIG. 3, a plurality of welded portions 48 for fixing the core pieces 45a to each other are provided on at least one of the back yoke portions 46 of the core pieces 45 along the stacking direction of the core pieces 45a. It is provided. Each weld 48 is provided on the inner peripheral surface of the armature core 41. In this example, six welded portions 48 are provided on the armature core 41 in accordance with the circumferential positions of the six second through holes 102 that are bolt through holes.

The molded body 43 is provided on the armature core 41 by molding. That is, the molded body 43 is a molded body integrated with the armature core 41. The shape of the molded body 43 when viewed in the axial direction of the armature 4 is a continuous ring along the circumferential direction of the armature core 41, as shown in FIG. Further, the molded body 43 is provided so as to straddle the split iron cores 45 adjacent to each other. As a result, the molded body 43 connects the core segments 45 adjacent to each other. In addition, as shown in FIG. 2, the molded body 43 includes a first molded portion 43 a provided on one end surface of the split iron core 45 in the axial direction and a second molded portion 43 a provided on the other end surface of the split iron core 45 in the axial direction. It has a part 43b and a connecting part 43c provided in the first through hole 103 and provided between the first molding part 43a and the second molding part 43b.

Each shape of the 1st shaping|molding part 43a and the 2nd shaping|molding part 43b is the annular shape which follows along the circumferential direction of the armature core 41. The connecting portion 43c is filled in each of the first through holes 103. Thereby, the connecting portion 43c connects the first molding portion 43a and the second molding portion 43b to each other. The plurality of connecting portions 43c filling each of the first through holes 103 are connected to the common first molding portion 43a and the common second molding portion 43b, respectively.

The molded body 43 is provided in the back yoke portion 46 of each split iron core 45 while avoiding the second through hole 102. As a result, the molded body 43 is arranged radially inside the coil 42. In this example, when viewed along the axial direction of the armature 4, as shown in FIG. 4, the molded body 43 is provided only in the annular region passing between each coil 42 and each second through hole 103. It is arranged. As a result, in a state where the armature 4 is fixed to the housing 6, as shown in FIG. 2, a part of the surface of each back yoke portion 46 is in contact with the housing 6, and the housing of each back yoke portion 46 is The surface that contacts 6 is not covered with the molded body 43 and is exposed to the outside as a housing mounting surface. Further, in each of the split iron cores 45, the radially outer end surface of the tooth portion 47 is not covered with the molded body 43 and is exposed to the outside.

Next, a method of manufacturing the armature 4 will be described. First, a plurality of core pieces 45a are manufactured by punching a steel plate with a die. When each core piece 45a is formed, a protrusion and a recess are provided at the connecting end of the core piece 45a. Then, a plurality of core piece arrangement layers in which six core pieces 45a are arranged are stacked and laminated. At this time, a plurality of core piece arrangement layers are laminated so that the connecting ends of the core pieces 45a are alternately overlapped in the stacking direction. After this, the alternately overlapping connecting ends are rotatably connected by the connecting shaft 101. That is, among the connecting end portions that overlap each other, the protrusion of one connecting end portion and the recess of the other connecting end portion are fitted to each other, so that the connecting end portions are rotated using the protrusion as the connecting shaft 101. Connect movably. As a result, the split iron core connected body 44 in which the six split iron cores 45 are connected is completed.

After that, the coils 42 are provided on the teeth portions 47 of each of the split iron cores 45 in the split iron core linked body 44.

FIG. 6 is a configuration diagram showing a state in which the coil 42 is provided in the core segment linked body 44 of FIG. When the coils 42 are provided in the respective tooth portions 47 of the split iron core connected body 44, the split iron cores 45 are rotated about the axis of the connecting shaft 101 in the direction in which the space between the adjacent tooth portions 47 is widened to connect the split iron cores. The body 44 is expanded. After that, the conductor wire of the coil 42 is wound around the tooth portion 47 while moving the winding nozzle of the winding machine 104. In this way, the coils 42 are individually provided to the tooth portions 47.

After that, in a state where the three divided iron core linked bodies 44 in which the coils 42 are provided on all the tooth portions 47 are arranged in an annular shape, the divided iron core linked bodies 44 are rotatably linked by the connecting shaft 101. As a result, the annular armature core 41 provided with the 18 coils 42 is completed.

After that, welding is performed on the inner peripheral surface of the armature core 41 along the stacking direction of the plurality of core pieces 45a in accordance with the circumferential position of the specific second through hole 102 that is a bolt through hole. I do. As a result, a plurality of welds 48 are provided on the inner peripheral surface of the armature core 41.

After that, the armature core 41 is molded with resin. At this time, the resin is injected into the armature core 41 from only one of the one axial end surface and the other axial end surface of the armature core 41. The resin injected from one side of the armature core 41 passes through each first through hole 103 and exits to the other side of the armature core 41, that is, the opposite side to the injection side. Thereby, the molded body 43 is provided on each of the one end face in the axial direction and the other end face in the axial direction of the armature core 41. That is, the molded body 43 is molded integrally with the armature core 41. In this way, the resin molded body 43 is integrally provided on the armature core 41 provided with the 18 coils 42, and the armature 4 is completed.

After that, the armature 4 is fitted on the outer peripheral surface of the inner cylindrical portion 6c of the housing 6, and then the plurality of bolts 10 passed through the specific second through holes 102 as bolt through holes are attached to the housing 6. As a result, the armature 4 is fixed to the housing 6.

Next, the operation will be described. When power is supplied to each coil 42, a rotating magnetic field is generated in the armature 4. As a result, the rotor 5 and the sheave 3 rotate about the axis of the main shaft 6a. When the sheave 3 rotates, the car and the counterweight move in the vertical direction according to the rotation of the sheave 3.

When the sheave 3 and the rotor 5 rotate about the axis of the main shaft 6 a, the detector rotor 82 rotates with respect to the detector stator 81 according to the rotation of the sheave 3 and the rotor 5. As a result, the rotational position of the rotor 82 for the detector is detected by the stator 81 for the detector as the rotational position of the sheave 3 and the rotor 5, and the information on the rotational position of the sheave 3 and the rotor 5 is transferred from the stator 81 for the detector to the control device. Sent. The operation of the elevator is controlled based on the information on the rotational positions of the sheave 3 and the rotor 5 sent from the detector stator 81 to the control device.

In the armature 4 of such a rotary electric machine, since the resin molded bodies 43 are provided so as to straddle the mutually adjacent split iron cores 45, it is possible to suppress the split iron cores 45 from separating from each other by the molded body 43. You can Therefore, since the work of fitting the concave portion and the convex portion by press fitting is eliminated, it is possible to eliminate the work of accurately processing the concave portion and the convex portion, and also to reduce the labor of the work of connecting the plurality of split iron cores 45 to each other. You can In addition, since the first through hole 103 is provided in the back yoke portion 46 of each of the split iron cores 45 and the connecting portion 43c of the molded body 43 is provided in the first through hole 103, the axial direction of the split iron cores 45 is reduced. By only injecting the resin from one side, the resin can reach both sides in the axial direction of the split iron core 45 through the first through holes 103. Thereby, the molded body 43 can be easily provided on each of the axial direction one end surface and the axial direction other end surface of the split iron core 45. Because of this, the armature 4 can be easily manufactured.

Further, since the first molding portion 43a and the second molding portion 43b are connected via the connecting portion 43c provided in the first through hole 103, the strength of each split iron core 45 in the axial direction is increased. be able to. This can prevent the split iron core 45 from contracting in the axial direction, and can prevent the bolt 10 fixing the armature 4 to the housing 6 from loosening.

That is, in the split iron core 45, since the plurality of core pieces 45a are laminated, a lamination gap of several μm to several tens of μm is generated between the core pieces 45a. Therefore, normally, the split iron core 45 contracts in the stacking direction of the core pieces 45a by the fastening force of the bolt 10 and further contracts with the passage of time. When the split iron core 45 contracts in the stacking direction of the core pieces 45a, the bolts 10 tend to loosen, and the core pieces 45a easily vibrate. As a result, the armature 4 becomes weak against vibration.

In the armature 4 according to the present invention, since the strength of each split iron core 45 is increased by the resin molded body 43, it is possible to suppress the split iron core 45 from shrinking in the stacking direction of the core pieces 45a, and The loosening of 10 can be suppressed. This makes it possible to make the core pieces 45a less likely to vibrate and to make the armature 4 stronger against vibration.

Moreover, since the molded body 43 is a molded body that is integrated with the armature core 41, the molded body 43 can be provided on the armature core 41 by molding, and the armature 4 can be manufactured more easily. It can be carried out.

Further, since the welded portion 48 for fixing the plurality of core pieces 45a to each other is provided in at least one of the back yoke portions 46 of the plurality of split iron cores 45 along the stacking direction of the core pieces 45a, the core piece 45a. The strength of the split iron core 45 in the stacking direction can be further increased by the welded portion 48. Thereby, contraction of the split iron core 45 in the stacking direction of the core pieces 45a can be further suppressed, and the bolt 10 passed through the second through hole 102 is loosened, and the split iron core 45 is likely to vibrate. Can be suppressed. Further, since the welded portion 48 is provided on the inner peripheral surface of the armature core 41, it is possible to reduce the influence of the distortion of the split iron core 45 due to the welded portion 48 on the efficiency of the motor 2.

In addition, among the back yoke portions 46 of the adjacent split iron cores 45, the connecting end portion of one back yoke portion 46 and the connecting end portion of the other back yoke portion 46 are alternately overlapped in the axial direction. Moreover, since the connecting end portions overlapping each other are rotatably connected to each other about the axis of the connecting shaft 101, the plurality of split iron cores 45 can be rotatably connected to each other. Thereby, when the conducting wire of the coil 42 is wound around the teeth portion 47 of each of the split iron cores 45, the split iron cores 45 can be rotated in a direction in which the distance between the teeth portions 47 increases. Thereby, the number of turns of the coil 42 provided in each tooth portion 47 can be increased. Moreover, since the plurality of split iron cores 45 can be connected in advance before the coil 42 is provided on the teeth portion 47, the work of assembling the armature iron core 41 can be facilitated.

Further, since the radially outer end surfaces of the teeth portions 47 are exposed to the outside without being covered by the molded body 43, the gap size between the permanent magnets 52 of the rotor 5 and the armature 4 can be easily adjusted. Can be secured. As a result, it is possible to prevent the assembly accuracy between the armature 4 and the rotor 5 from becoming severe, and it is possible to further facilitate the manufacturing of the motor 2.

Further, since a part of the surface of each back yoke portion 46 is exposed to the outside as a housing mounting surface, when the armature 4 is fixed to the housing 6, it is formed between the armature core 41 and the housing 6. The armature core 41 can be brought into contact with the housing 6 without interposing the body 43.

Here, when the motor 2 is driven, the armature 4 generates heat due to the copper loss due to the current flowing through the coil 42 and the iron loss due to the magnetic flux flowing through the armature core 41. When the armature 4 becomes hot, the motor 2 may be damaged. In the present embodiment, the armature core 41 can be brought into contact with the housing 6, so that the heat generated by the armature 4 can be effectively dissipated to the housing 6, and the motor 2 is prevented from becoming hot. can do.

Further, since the teeth portion 47 of each split iron core 45 projects radially outward from the back yoke portion 46, the outer rotor type motor 2 in which the armature 4 is arranged inside the annular rotor 5 can be obtained. As a result, the brake 7 that applies the braking force to the rotor 5 can be arranged radially outside the rotor 5, and the maintenance personnel can easily access the brake 7 when performing maintenance work on the brake 7. it can.

Here, the sheave 3 and the brake 7 are examples of the maintenance target parts of the elevator. As types of brakes, there are an external contact type brake arranged radially outside of the rotor 5 and an inward expansion type brake arranged radially inside of the rotor 5. Since the brake of the inward expansion type is arranged inside the rotor 5, it is necessary to maintain the brake and the sheave 3 in opposite directions, which increases the burden of maintenance work on the brake. On the other hand, in the motor 2 according to the present invention, since the circumscribed brake 7 arranged radially outside the rotor 5 is used, maintenance work for the sheave 3 and the brake 7 can be performed from the same direction. Therefore, it is possible to reduce the time and effort required for maintenance work on the motor 2.

Also, in a machine room-less elevator in which a thin hoist is installed in the gap between the car and the hoistway wall without providing a machine room, the hoist can be made thinner due to the layout in the building. The demand is increasing.

When the circumscribed brake 7 is applied to the inner rotor type motor in which the rotor is arranged inside the ring-shaped armature, the outer peripheral surface of the rotor is pressed by the brake 7 from the outside in the radial direction. It is necessary to project the rotor from the armature in the axial direction until the outer peripheral surface of the rotor is exposed from the end surface. On the other hand, in the elevator hoisting machine 1 according to the present invention, the outer rotor type motor 2 in which the armature 4 is arranged inside the annular rotor 5 is used, so that the armature is installed to install the brake 7. It is not necessary to project the rotor 5 in the axial direction from the end surface of the rotor 4. As a result, in the elevator hoisting machine 1 according to the present invention, the dimension of the entire elevator hoisting machine 1 in the axial direction can be reduced, and the elevator hoisting machine 1 can be made thin.

In addition, in the above example, the shape of the molded body 43 is a continuous ring along the circumferential direction of the armature core 41, but the molded body 43 is divided into a plurality of divided portions in the circumferential direction of the armature core 41. You may. For example, as shown in FIG. 7, the molded body 43 may be divided into a plurality of divided portions provided for each of the two divided iron cores 45.

Embodiment 2.
FIG. 8 is a front view showing an armature of an elevator hoisting machine according to Embodiment 2 of the present invention. 9 is a sectional view taken along the line IX-IX in FIG. Further, FIG. 10 is a sectional view showing the armature 4 of FIG. Each coil 42 is covered with a first molding portion 43a and a second molding portion 43a. In this example, both of the shapes of the first molding portion 43a and the second molding portion 43b when viewed along the axial direction of the armature 4 have an annular shape that is continuous along the circumferential direction of the armature core 41. Has become. As a result, the first molding portion 43a and the second molding portion 43b are not only connected via the connecting portion 43c in each first through hole 103, but also between the teeth portions 47 and between the coils 42. The parts of the molded body 43 interposed in the respective gaps are also connected to each other.

The first forming portion 43a is provided on one end face in the axial direction of each split iron core 45 while avoiding the second through hole 102. The second forming portion 43b is provided on the other end surface in the axial direction of each split iron core 45 while avoiding the second through hole 102. As a result, in each of the split iron cores 45, as shown in FIG. 10, the radially outer end surface 41c of the tooth portion 47 and the radially inner portion of the back yoke portion 46 are not covered with the molded body 43 and are exposed to the outside. Exposed. In a state where the armature 4 is fixed to the housing 6, as shown in FIG. 9, a portion 41a of one end surface in the axial direction of the split iron core 45, and a back yoke portion of the radially inner portion of the back yoke portion 46. A portion 41b of the end surface on the radially inner side of 46 contacts the housing 6 as a housing mounting surface. Other configurations are similar to those of the first embodiment.

In such an armature 4, since each coil 42 is covered with the first molding portion 43a and the second molding portion 43b, each coil 42 can be protected by the molding body 43. Thereby, even if the armature core 41 vibrates, it is possible to more reliably prevent the coils 42 from being damaged.

Further, since each coil 42 is covered with the first molding portion 43a and the second molding portion 43b, direct heat radiation from each coil 42 to the outside is suppressed, but each of the split iron cores 45 Since a part of the surface comes into contact with the housing 6 as a housing mounting surface, the heat generated in the armature 4 can be effectively dissipated from the armature core 41 to the housing 6 and the temperature of the armature 4 can be prevented. Can be suppressed.

Embodiment 3.
11 is a front view showing an armature of an elevator hoisting machine according to a third embodiment of the present invention. FIG. 12 is a rear view showing the armature shown in FIG. Further, FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 11, and FIG. 14 is a sectional view taken along line XIV-XIV in FIG. FIG. 15 is a front view showing the armature core of FIG. In each split iron core 45, the first through hole 103 is connected to the second through hole 102. In this example, the first through hole 103 is an elongated hole along the radial direction of the armature core 41. As a result, the cross-sectional shape of the hole in which the first through hole 103 is connected to the second through hole 102 is a shape in which the slit extends from the circular shape to the outside in the radial direction, that is, a dull hole shape.

Similar to the second embodiment, each coil 42 is covered with the first molding portion 43a and the second molding portion 43b. Further, the radially inner end surface of each back yoke portion 46 and the radially outer end surface of each tooth portion 47 are exposed to the outside without being covered with the molded body 43, as in the second embodiment.

As shown in FIG. 12, the first molding portion 43a is provided on one axial end surface of the split iron core 45 while avoiding the connecting shaft 101 and the second through hole 102. As a result, on the axially one end surface of the split iron core 45, only the radially inner portion of the back yoke portion 46 is exposed to the outside without being covered by the first molding portion 43a.

As shown in FIG. 11, the second molding portion 43b is provided in a state of covering the entire other end surface in the axial direction of the split iron core 45. The second molding portion 43b is provided with a plurality of exposing holes 431 for exposing only a specific second through hole 102, which is a bolt through hole, out of the plurality of second through holes 102. ing. Each of the exposing holes 431 penetrates the second molding portion 43b along the axial direction of the armature 4. The specific second through hole 102, which is a bolt through hole, is exposed to the outside through the exposing hole 431. In this example, six exposing holes 431 are provided in the second molding portion 43b in accordance with the positions of the six second through holes 102 that are bolt through holes.

The armature 4 is fixed to the housing 6 by means of six bolts 10 that are passed through the specific second through holes 102. The bolt 10 is inserted into the second through hole 102 through the exposing hole 431. When the armature 4 is fixed to the housing 6, as shown in FIGS. 13 and 14, of the radially inner portion of the back yoke portion 46, the portion of the split iron core 45 on the one end surface in the axial direction, and the back portion. A portion of the end surface on the radially inner side of the yoke portion 46 contacts the housing 6 as a housing mounting surface.

The first molding portion 43a and the second molding portion 43b are connected to each other through a plurality of connecting portions 43c filled in the first through holes 103. Since the bolt 10 is inserted into the specific second through hole 102 which is a bolt through hole, the connecting portion 43c of the molded body 43 is not filled, as shown in FIG. On the other hand, since the bolt 10 is not inserted into the second through hole 102 other than the bolt through hole, the connecting portion 43c of the molded body 43 is filled and provided as shown in FIG. That is, the connecting portion 43c provided in the first through hole 103 connected to the second through hole 102 other than the bolt through hole also extends to the second through hole 102. Therefore, the connecting portion 43c is entirely filled in the hole formed by the second through hole 102 and the first through hole 103 other than the bolt through hole. Other configurations are the same as those in the second embodiment.

In the armature 4 as described above, the first through hole 103 is connected to the second through hole 102. Therefore, while suppressing a decrease in the efficiency of the motor 2, the split iron core 45 of the core piece 45a in the stacking direction is reduced. The strength can be further increased.

That is, if the inner diameter of the first through hole 102 is simply increased in order to increase the strength of the split iron core 45 by the molded body 43, the magnetic path of the back yoke portion 46 passing near the teeth portion 47 becomes narrow, and the motor The efficiency of 2 is reduced. On the other hand, in the armature 4 according to the present embodiment, by connecting the first through hole 103 to the second through hole 102, the first through hole 103 and the second through hole 102 are connected to each other so that the magnetic path of the back yoke portion 46 passing through the vicinity of the teeth portion 47 is located within the range. The volume of the space in the first through hole 103 can be increased without enlarging the first through hole 103. As a result, the volume of the connecting portion 43c filling the first through hole 103 can be increased without narrowing the magnetic path of the back yoke portion 46 passing near the teeth portion 47, and the first forming portion 43a and It is possible to reduce the number of places where the force for connecting the second molding portion 43b is insufficient. Therefore, it is possible to further increase the strength of the split iron core 45 in the stacking direction of the core pieces 45a and further improve the reliability of the armature 4 against vibration, while suppressing a decrease in the efficiency of the motor 2.

Further, among the respective second through holes 102, a specific second through hole 102 is a bolt through hole, and the connecting portion 43c provided in the first through hole 103 has a second through hole other than the bolt through hole. Since the second through hole 102 is also provided, the volume of the connecting portion 43c can be increased without enlarging the first through hole 103. As a result, it is possible to reduce locations where the force connecting the first molding portion 43a and the second molding portion 43b becomes insufficient without narrowing the magnetic path of the back yoke portion 46. Therefore, it is possible to further increase the strength of the split iron core 45 in the stacking direction of the core pieces 45a and further improve the reliability of the armature 4 against vibration, while suppressing a decrease in the efficiency of the motor 2.

In the above example, in each of the split iron cores 45, the first through hole 103 is connected to the second through hole 102. However, as in the first and second embodiments, the first through hole 103 is the first through hole 103. It may be separated from the two through holes 102. In this case, the specific second through hole 102, which is a bolt through hole, is not filled with the connecting portion 43c, and the second through holes 102 other than the bolt through hole are filled with the connecting portion 43c.

Further, in each of the above-described embodiments, the back yoke portions 46 of the respective split iron cores 45 are connected to each other by the connecting shaft 101 penetrating the alternately overlapping connecting end portions of the plurality of core pieces 45a, but they alternately overlap. Providing a protrusion projecting in the stacking direction of the core piece 45a and a recess recessed in the stacking direction of the core piece 45a at each of the connecting end portions of the plurality of core pieces 45a, and by fitting the projections and the recesses together, The back yoke portions 46 of the split iron core 45 may be connected to each other. In this case, the protrusion and the recess are formed on the axis of the virtual connecting shaft along the stacking direction of the core piece 45a. As a result, the back yoke portion 46 of each split iron core 45 is rotatably connected about the axis of the virtual connecting shaft.

Further, in each of the above-described embodiments, the back yoke portions 46 of the split iron cores 45 adjacent to each other are rotatably connected to each other about the axis of the connecting shaft 101, but each split iron core 45 includes only the molded body 43. It is not necessary to rotatably connect the split iron cores 45 with the connecting shaft 101. Even in this case, the split iron cores 45 can be connected to each other by the molded body 43, and the labor for manufacturing the armature 4 can be reduced.

Further, in each of the above embodiments, the rotating electric machine according to the present invention is used as the motor 2, but the rotating electric machine according to the present invention may be used as a generator.

1 Elevator Hoisting Machine, 2 Motor (Rotating Electric Machine), 3 Sheaves, 4 Armature, 5 Rotor, 6 Housing, 7 Brake, 9 Bearing, 41 Armature Iron Core, 42 Coil, 43 Molded Body, 43a First Molding Part, 43b second molded part, 43c connecting part, 45 split core, 45a core piece, 46 back yoke part, 47 teeth part, 48 welding part, 51 permanent magnet, 101 connecting shaft, 102 second through hole, 103 First through hole.

Claims (14)

An annular armature core having a plurality of divided iron cores arranged in the circumferential direction, and a resin molded body provided across the divided iron cores adjacent to each other,
Each of the split iron cores has a back yoke portion and a tooth portion that projects radially outward from the back yoke portion,
Each of the back yoke portions is provided with a first through hole,
The molded body includes: And a connecting portion which is provided inside and which connects the first molding portion and the second molding portion to each other ,
Each of the split cores has a plurality of core pieces laminated in the axial direction,
Out of the back yoke portions of each of the split iron cores adjacent to each other, a connecting end portion of the core piece of the one back yoke portion and a connecting end portion of the core piece of the other back yoke portion are Alternately overlapping in the axial direction, and the connecting end portions that overlap each other are connected so as to be rotatable around the axis of the connecting shaft,
The connecting shaft is an armature for a rotary electric machine, which is provided radially inside the first through hole . An annular armature core having a plurality of divided cores arranged in the circumferential direction, and
Molded body made of resin provided over the split cores adjacent to each other
Equipped with
Each of the split iron cores has a back yoke portion and a tooth portion that projects radially outward from the back yoke portion,
Each of the back yoke portions is provided with a first through hole,
The molded body includes a first molded portion provided on one end surface in the axial direction of the split iron core, a second molded portion provided on the other end surface in the axial direction of the split iron core, and the first through hole. And a connecting portion which is provided inside and which connects the first molding portion and the second molding portion to each other,
Each of the back yoke portions is provided with a second through hole different from the first through hole,
Each of the first through holes is connected to the second through hole,
Each said of the second through-hole, a specific second through hole that has become the bolt insertion hole rotary electric machine armature. The armature for a rotary electric machine according to claim 1, wherein the first through hole is individually provided in each of the back yoke portions. The armature for a rotary electric machine according to claim 1 , wherein the molded body is a molded body integrated with the armature core. Each of the split cores has a plurality of core pieces laminated in the axial direction,
Wherein the said back yoke portion of at least one of the plurality of divided cores, claims 1 to welds for fixing the plurality of core pieces to each other is provided along the stacking direction of the plurality of core pieces An armature for a rotating electric machine according to any one of 4 above. A plurality of coils provided on each of the teeth portions,
Wherein the plurality of coils, said first mold portion and said second armature of a rotary electric machine according to any one of claims 1 to 5 which are covered by the molded part. The armature of the rotary electric machine according to any one of claims 1 to 6 , wherein the radially outer end surface of each tooth portion is exposed to the outside. Part of the surface of each of said back yoke unit, an armature of a rotary electric machine according to any one of claims 1 to 7 which is exposed to the outside as the housing mounting surface. Each of the back yoke portions is provided with a second through hole different from the first through hole,
Of the second through holes, the specific second through hole is a bolt through hole,
The armature for a rotary electric machine according to claim 1, wherein the connecting portion is provided in the second through hole other than the bolt through hole. An armature according to any one of claims 1 to 9,
A rotor having a plurality of magnets arranged radially outside the armature with a gap between the armature and rotating with respect to the armature;
A rotating electric machine comprising: a housing to which the armature is fixed and the rotor is rotatably supported via bearings; and a brake provided in the housing to apply a braking force to the rotor. An elevator hoisting machine comprising a motor, which is the rotating electric machine according to claim 10, and a sheave fixed to the rotor. An armature manufacturing method for manufacturing the armature of the rotating electric machine according to claim 1.
An armature manufacturing method, comprising molding the molded body integrally with the armature core. An armature manufacturing method for manufacturing the armature of the rotating electric machine according to claim 1.
Each of the split cores has a plurality of core pieces laminated in the axial direction,
A method for manufacturing an armature, wherein a welded portion for fixing the plurality of core pieces to each other is formed by welding the plurality of core pieces along a laminating direction. An armature manufacturing method for manufacturing the armature of the rotating electric machine according to claim 1.
Each of the split cores has a plurality of core pieces laminated in the axial direction,
Of each of the back yoke part of the divided core adjacent to each other, and connecting the ends of the core pieces of one of the back yoke unit, and a connecting end of the other of the core pieces of the back yoke portion Alternately overlapping in the axial direction, and the connecting end portions that overlap each other are connected so as to be rotatable around the axis of the connecting shaft,
A method for manufacturing an armature, wherein the protrusion and the recess provided when the core piece is formed are fitted to each other to connect the connecting ends with each other by using the protrusion as the connecting shaft.

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