JP2024012914A - Insulator, and manufacturing method of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulator capable of simplifying a manufacturing method of a rotary electric machine, and to provide a manufacturing method of the rotary electric machine therefor.

SOLUTION: A first insulator 10A according to the present disclosure comprises: an insulator body 11 arranged in a core block 42; and a protrusion 17 protruding from the insulator body 11. An outer peripheral side jaw part 15 in which a connection part 16A is formed is provided in the insulator body 11. Further, in a state where the insulator body 11 is arranged in the core block 42, the core block 42 is placeable on a placement face 50 via the outer peripheral side jaw part 15 by overlapping the connection part 16A with the placement face 50. Further, in a state where the insulator body 11 is arranged with the connection part 16A directed downward in a vertical direction, the protrusion 17 protrudes downward from the connection part 16A.

SELECTED DRAWING: Figure 9

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present disclosure relates to an insulator disposed in a core block and a method for manufacturing a rotating electric machine.

BACKGROUND ART Conventionally, in a stator of a rotating electrical machine, a configuration is known in which an insulating sheet is provided with a protrusion for promoting dripping of varnish (see, for example, Patent Document 1).

WO2018/100666A1

In the conventional rotating electric machine shown in Patent Document 1, a removal process using a removal tool such as a cutter is required to remove the protrusion from the insulating sheet, which makes it impossible to further simplify the manufacturing process of the rotating electric machine. There was an issue.

The present disclosure has been made to solve the above-mentioned problems, and aims to provide an insulator that can simplify the method of manufacturing a rotating electrical machine, and a method of manufacturing the rotating electrical machine.

An insulator according to the present disclosure includes an insulator body disposed in a core block of a rotating electric machine, and a protrusion protruding from the insulator body, and the insulator body is provided with an overhang portion in which a connection portion is formed. When the insulator body is placed on the core block, the connecting part overlaps the mounting surface, and the core block can be placed on the mounting surface via the overhanging part. When the insulator main body is installed facing downward, the protrusion protrudes downward from the connection portion.

According to the insulator and the method of manufacturing a rotating electrical machine according to the present disclosure, the method of manufacturing a rotating electrical machine can be simplified.

1 is a sectional view showing a hoisting machine in Embodiment 1. FIG. FIG. 2 is a sectional view showing a stator of the hoisting machine shown in FIG. 1. FIG. FIG. 3 is a side view showing a state in which a pair of insulators in Embodiment 1 are arranged in a core block. FIG. 4 is a schematic view showing a first end surface of the first insulator of FIG. 3. FIG. FIG. 4 is a perspective view showing a state in which the first insulator of FIG. 3 is arranged in a core block. 6 is an enlarged view showing part A in FIG. 5. FIG. FIG. 2 is a schematic diagram showing the first insulator of FIG. 1 viewed from the axial direction. 2 is a flowchart showing a procedure for manufacturing the stator of FIG. 1. FIG. 9 is a side view showing the state of one stator unit in the removal process of FIG. 8. FIG.

Embodiments of the present disclosure will be described below with reference to the drawings.
Embodiment 1.
FIG. 1 is a sectional view showing a hoisting machine 30 in the first embodiment. FIG. 2 is a sectional view showing the stator 40 of the hoisting machine 30 of FIG. 1. FIG. 3 is a side view showing a state in which the pair of insulators 10 according to the first embodiment are arranged on the core block 42.

FIG. 1 shows a cross section of the hoisting machine 30 along the rotation axis L. FIG. 2 is a sectional view showing the stator 40 of the hoisting machine 30 of FIG. 1. FIG. 3 shows a state in which the core block 42 is arranged such that the axis of the core block 42 runs along the vertical direction in the figure. FIG. 3 shows the state of the stator unit 41 in the manufacturing process.

The hoist 30 generates power to vertically move an elevator car (not shown) and a counterweight (not shown). The hoist 30 includes a sheave 31, a housing 32, a motor 33, and a cover 36. The motor 33 rotates around a rotation axis L. The sheave 31 is rotated by the driving force of the motor 33.

The sheave 31 has a cylindrical shape. The sheave 31 has an axis. The sheave 31 is supported by a motor 33.

The shape of the housing 32 is a hollow cylinder. An opening 32a is formed at one end of the housing 32. A central shaft 32b is provided inside the housing 32. The axis of the center shaft 32b and the rotation axis L are on the same straight line.

The motor 33 has a rotor 34, a pair of bearings 35, and a stator 40. The motor 33 has an axis.

The rotor 34 has a disk shape. The rotor 34 has an axis. A through hole 34a is formed in the center of the rotor 34 along the axis. A plurality of magnets 34c are installed on the outer peripheral surface 34b of the rotor 34.

Each of the pair of bearings 35 is fitted onto the central shaft 32b. A central shaft 32b into which a pair of bearings 35 are fitted is inserted into the through hole 34a of the rotor 34. The rotor 34 is supported by the central shaft 32b via a pair of bearings 35. Thereby, the rotor 34 is rotatably supported with respect to the housing 32 around the axis.

The shape of the stator 40 is annular. Stator 40 has an axis. The stator 40 is fixed to the housing 32 so that the axis of the stator 40 and the rotational axis L are on the same straight line.

The cover 36 is a disc-shaped plate material. A cover through hole 36a is formed in the center of the cover 36. With the rotor 34, the pair of bearings 35, and the stator 40 housed in the housing 32, the cover 36 is placed in the opening 32a.

The sheave 31 supported by the rotor 34 projects from the inside of the housing 32 to the outside through the cover through hole 36a.

The stator 40 has a plurality of stator units 41 arranged in a ring. Stator 40 is covered with a hardened varnish 46. The varnish 46 will be explained later.

Each stator unit 41 includes a core block 42, a pair of insulators 10, which are a first insulator 10A and a second insulator 10B, and a winding 45. When the stator units 41 are arranged in a ring, a straight line colinear with the axis of the stator 40 is defined as the axis of each stator unit 41 and the axis of each core block 42.

The core block 42 includes a core back portion 42a having an outer peripheral surface that is a surface along an arc centered on a point on the axis of the core block 42, and teeth that protrude from the core back portion 42a toward the axis of the core block 42. It has a portion 42b.

The direction from the outer peripheral surface of the core back portion 42a toward the axis of the core block 42 is defined as the radial direction of the core block 42. The radial direction of the core block 42 and the radial direction of the stator 40 match.

The core block 42 is constructed by laminating a plurality of plate members punched from steel plates. The direction in which the plurality of plate members of the core block 42 are stacked is the same as the axial direction of the core block 42.

Insulators 10 are arranged at both ends of the core block 42 in the axial direction. A first insulator 10A is arranged at one end of the core block 42 in the axial direction, and a second insulator 10B is arranged at the other end of the core block 42 in the axial direction.

Each of the pair of insulators 10 is placed on the core block 42, and the winding 45 is placed around the pair of insulators 10 and the core block 42. The winding 45 is wound at a position corresponding to the teeth portion 42b to form a coil 45C.

The connecting portion 16A of the first insulator 10A is not covered with the varnish 46 and is exposed. The connection portion 16A will be explained later.

The second insulator 10B includes an insulator body 11 that is a long member. A shaft-side jaw portion 14 is provided at one end of the insulator body 11 in the longitudinal direction. At the other end in the longitudinal direction of the insulator main body 11, an outer peripheral jaw portion 15, which is a projecting portion, is provided.

A core contact surface 12 that contacts the core block 42 is formed in the second insulator 10B. The second insulator 10B is arranged such that the longitudinal direction of the insulator main body 11 is along the teeth portion 42b and along the radial direction of the core block 42. In FIG. 3, the core contact surface 12 is shown by solid lines and broken lines.

When the second insulator 10B is disposed on the core block 42, the shaft jaw 14 and the outer jaw 15 protrude in a direction perpendicular to the radial direction of the core block 42. The second insulator 10B is arranged such that the shaft jaw 14 is arranged on the radial axis side of the core block 42 and the outer peripheral jaw 15 is arranged on the outer peripheral side of the core block 42 in the radial direction. .

The insulator body 11 is formed with a pair of walls 12a that protrude from the core contacting surface 12 in the normal direction. The pair of walls 12a are formed along the pair of long sides of the core contact surface 12 and at positions corresponding to the teeth portions 42b. When the second insulator 10B is installed on the core block 42, the pair of walls 12a cover the side surfaces of the teeth portions 42b.

The second insulator 10B is made of resin. The insulator body 11 is formed by a well-known resin molding method using a mold.

Next, the first insulator 10A will be explained. FIG. 4 is a schematic diagram showing the first end surface 11a of the first insulator 10A in FIG. 3. FIG. 5 is a perspective view showing a state in which the first insulator 10A of FIG. 3 is arranged on the core block 42. As shown in FIG. FIG. 6 is an enlarged view showing section A in FIG.

4 to 6 show the first insulator 10A during the manufacturing process of the stator 40. 4 to 6 show a state in which the core block 42 is arranged such that the axis of the core block 42 runs along the vertical direction in the drawings. The first insulator 10A will be explained along with FIGS. 3 to 6.

The first insulator 10A is different from the second insulator 10B in that it includes a protrusion 17 and a guide groove 18 formed on the side surface of the outer jaw 15. Regarding the remaining configurations, since the first insulator 10A and the second insulator 10B are the same, description thereof will be omitted.

The first insulator 10A further includes a protrusion 17 provided on the outer jaw 15 of the first insulator 10A. The outer jaw 15 is provided with a seating surface 16 facing opposite to the core contacting surface 12 .

A first end surface 11a facing outward in the radial direction of the core block 42 is provided on the end surface of the insulator body 11 where the outer peripheral jaw portion 15 is provided. The first end surface 11a includes an end surface of the outer jaw portion 15.

The protrusion 17 is provided from the seating surface 16 to the edge of the seating surface 16 and the first end surface 11a. If the location where the protrusion 17 is provided on the outer jaw 15 is a connecting portion 16A, the connecting portion 16A is a part of the seating surface 16.

When the insulator main body 11 is installed with the outer jaw 15 protruding vertically downward, that is, when the seating surface 16 is placed vertically downward, the protrusion 17 It protrudes diagonally downward from the edge toward the outside of the seating surface 16. The protruding portion 17 projects downward from the connecting portion 16A.

That is, in the portion of the first insulator 10A excluding the projection 17, the seating surface 16 is the most protruding portion when viewed from the core contacting surface 12.

The shape of the protrusion 17 is cylindrical, and one end thereof has a tapered tip. The protrusion 17 has a first protrusion portion 17a having a tapered tip and a second protrusion portion 17b having a cylindrical shape. The tip of the first protrusion portion 17a is connected to the connecting portion 16A. The second protrusion portion 17b is connected to the insulator body 11 via the first protrusion portion 17a.

The cross-sectional area of the first protrusion portion 17a is smaller than the cross-sectional area of the second protrusion portion 17b. The cross-sectional area of the first protrusion portion 17a becomes smaller from the second protrusion portion 17b toward the tip portion connected to the connecting portion 16A.

The first insulator 10A is a resin molded product made of resin. The first insulator 10A, which is a resin molded product, is molded by a well-known injection molding method that uses a mold to manufacture a resin molded product.

A gate and a runner are formed in a resin molded product molded using a mold at a position corresponding to a sprue that is an inlet for introducing resin material into the mold. In this embodiment, the mold is designed so that a gate and a runner can be used as the projections 17.

That is, a gate formed at a gate during injection molding is used as the first protrusion 17a. A runner formed at a sprue portion during injection molding is used as the second protrusion portion 17b.

One guide groove 18 is formed in the first end surface 11a. The guide groove 18 is formed from the core contacting surface 12 toward the connecting portion 16A. The guide groove 18 is connected to the core contact surface 12.

A portion of the guide groove 18 that is connected to the core contacting surface 12 is a wide portion 18a. The portion of the guide groove 18 closest to the connecting portion 16A is the narrow portion 18b. When viewed from the normal direction of the first end surface 11a, the distance in the direction parallel to the core contact surface 12 of the wide portion 18a is the distance in the direction parallel to the core contact surface 12 of the other guide grooves 18 other than the wide portion 18a. It is the longest compared to the distance.

When viewed from the normal direction of the first end surface 11a, the distance in the direction parallel to the core contact surface 12 of the narrow width portion 18b is the distance parallel to the core contact surface 12 of the other guide grooves 18 other than the narrow width portion 18b. It is the shortest compared to the distance in the direction. That is, the width of the guide groove 18 becomes narrower from the core contacting surface 12 toward the protrusion 17 .

In this embodiment, as shown in FIG. 3, the second insulator 10B is placed above the core block 42 in the drawing, and the first insulator 10A is placed below the core block 42 in the drawing.

FIG. 7 is a schematic diagram showing the first insulator 10A of FIG. 1 viewed from the axial direction. In FIG. 7, one stator unit 41 is shown with the winding 45 omitted. The protrusions 17 of the first insulator 10A used in the stator 40 are removed together with the hardened varnish 46 covering the protrusions 17 during the manufacturing process of the stator 40. Therefore, in the stator 40, the connecting portion 16A is exposed from the hardened varnish 46.

Next, a method for manufacturing a rotating electric machine will be explained. The method for manufacturing a rotating electric machine according to the present embodiment includes a method for manufacturing a stator 40, which will be described below. FIG. 8 is a flowchart showing the procedure for manufacturing the stator 40 of FIG. 1. FIG. 9 is a side view showing the state of one stator unit 41 in the removal process of FIG. 8.

In FIG. 9, the coil 45C and varnish 46 are omitted. Below, a method for manufacturing the stator 40 will be described based on FIG. 8. The method of manufacturing the rotating electrical machine other than the method of manufacturing the stator 40 described below is a conventionally well-known manufacturing method, and therefore the description thereof will be omitted.

<Preparation process>
In step S01, a preparation process is performed. The preparation process is a process of preparing parts necessary for manufacturing the stator 40. In order to manufacture a plurality of stator units 41, an operator prepares a plurality of core blocks 42, a plurality of pairs of insulators 10, and a plurality of windings 45. Furthermore, the operator prepares varnish 46 to cover stator 40.

As the plurality of pairs of insulators 10, a plurality of second insulators 10B and a plurality of first insulators 10A are prepared. After that, the manufacturing process proceeds to step S02.

<Unit assembly process>
In step S02, a unit assembly process is performed. The unit assembly process is a process of manufacturing a plurality of stator units 41 by assembling the parts prepared in the preparation process. The operator places the first insulator 10A at one end of each core block 42 in the axial direction, and the second insulator 10B at the other end.

Next, the operator simultaneously winds the teeth portion 42b and the pair of insulators 10 with the winding wire 45 to form a coil 45C. At this time, the winding 45 is wound between the shaft side jaw 14 and the outer peripheral side jaw 15.

In the unit assembly process of step S02, the first insulator 10A is disposed only at one end of each core block 42 in the set axial direction. One end of each core block 42 in the axial direction is an end of all the core blocks 42 located on the same side in the axial direction. That is, all of the first insulators 10A are installed only at the ends of the same side of each core block 42 in the axial direction. After that, the manufacturing process proceeds to step S03.

<Placement process>
In step S03, a placement process is performed. A plurality of stator units 41 created in the unit assembly process are arranged in a ring shape. The operator arranges each stator unit 41 in a ring shape. After that, the manufacturing process proceeds to step S04.

<Varnish curing process>
In step S04, a varnish curing step is performed. The varnish curing process is a process of impregnating a plurality of annularly arranged stator units 41 with varnish 46 and further curing the varnish 46. The operator impregnates the plurality of stator units 41 arranged in an annular manner with varnish 46 that has been heated and has fluidity. Thereafter, the varnish 46 is cooled and hardened.

An operator holds a plurality of annularly arranged stator units 41 impregnated with heated and fluidized varnish 46 and waits for the varnish 46 to harden. At this time, the operator may use a holder such as a holder to hold the plurality of stator units 41 arranged annularly.

The plurality of stator units 41 are held in such a manner that the end surfaces from which the respective protrusions 17 protrude are kept facing downward. That is, the posture of the plurality of stator units 41 is maintained so that each protrusion 17 faces downward.

The heated varnish 46, which has fluidity, flows from the second insulator 10B located at the top, through the core block 42 and the coil 45C, to the first insulator 10A located at the bottom. The varnish 46 flows along the guide groove 18, passes through the connecting portion 16A, and flows toward the protrusion 17.

The heated varnish 46 has a certain degree of viscosity and drips from the protrusion 17 like an icicle. Varnish 46 cools and hardens over time. The posture of the plurality of stator units 41 in which the end surfaces from which the respective protrusions 17 protrude are directed downward is maintained until the varnish 46 hardens. After that, the manufacturing process proceeds to step S05.

<Removal process>
In step S05, a removal process is performed. The removal process is a process of removing each protrusion 17. The operator places the plurality of stator units 41 covered with hardened varnish 46 on the mounting surface 50 with each protrusion 17 facing downward. The mounting surface 50 is the upper surface of a mounting table or the upper surface of a pallet placed on the upper surface of the mounting table.

With the insulator main body 11 disposed on each core block 42, the seating surface 16 including the connecting portion 16A overlaps the mounting surface 50. As a result, each core block 42 , that is, the plurality of annularly arranged stator units 41 is placed on the mounting surface 50 via each outer peripheral jaw 15 . That is, when the insulator main body 11 is placed on the core block 42, the connecting portion 16A overlaps the placement surface 50, so that the core block 42 can be placed on the placement surface 50 via the outer jaw portion 15. It has become.

Due to the weight of the plurality of stator units 41 when the seating surface 16 and the mounting surface 50 of the plurality of stator units 41 overlap and the impact at the time of mounting, each protrusion 17 is connected to the connecting portion 16A and the first protrusion. It bends between the part 17a and breaks. As a result, each protrusion 17 is removed from the plurality of stator units 41. With this, the stator 40 is completed.

The worker manufactures the rotating electric machine including the method for manufacturing the stator 40 described above.

The insulator according to the first embodiment includes the insulator body 11 disposed on the core block 42 and the protrusion 17 protruding from the insulator body 11. Further, the insulator main body 11 is provided with an outer peripheral jaw portion 15 in which a connecting portion 16A is formed. In addition, when the insulator main body 11 is placed on the core block 42, the connecting portion 16A overlaps the mounting surface 50, so that the core block 42 can be placed on the mounting surface 50 via the outer jaw 15. It has become. Further, when the insulator main body 11 is installed with the connecting portion 16A facing downward in the vertical direction, the protruding portion 17 projects downward from the connecting portion 16A. As a result, by placing the stator 40 covered with the hardened varnish 46 with the protrusion 17 facing downward, the connection portion 16A and the protrusion 17 are bent and broken. Therefore, each protrusion 17 can be easily removed from the stator 40. Therefore, the method for manufacturing the rotating electric machine can be simplified.

The protrusion 17 according to the first embodiment includes a first protrusion part 17a and a second protrusion part 17b. Further, the second protrusion portion 17b is connected to the insulator body 11 via the first protrusion portion 17a. Further, the cross-sectional area of the first protrusion portion 17a is smaller than the cross-sectional area of the second protrusion portion 17b. As a result, the protrusion 17 is broken at the first protrusion portion 17a having a small cross-sectional area. Therefore, the protrusion 17 can be removed with a small force. Therefore, the time required for the removal process can be shortened, and the method for manufacturing the rotating electric machine can be simplified. Furthermore, the force applied to the insulator body 11 during the removal process can be reduced. Therefore, the required strength of the seating surface 16 portion of the insulator body 11 is relaxed, and the portion including the seating surface 16 can be made thinner. Therefore, the insulator main body 11 can be downsized. Further, as a result, the protrusion 17 is broken at the first protrusion portion 17a having a small cross-sectional area. Therefore, the protrusion 17 can be removed from a position closer to the insulator main body 11. Therefore, after the protrusion 17 is removed, the portion of the protrusion 17 that remains on the connecting portion 16A can be reduced in size. Thereby, the protrusion 17 can be removed more easily and cleanly.

The cross-sectional area of the first protrusion portion 17a according to the first embodiment becomes smaller toward the insulator body 11 from the second protrusion portion 17b. Thereby, the cross-sectional area of the portion of the protrusion 17 connected to the connection portion 16A is minimized. Therefore, when removing the protrusion 17, the protrusion 17 is broken at the portion of the protrusion 17 that is connected to the connection portion 16A, which has the smallest cross-sectional area. Therefore, after the protrusion 17 is removed, the portion of the protrusion 17 remaining in the connecting portion 16A can be made smaller. Thereby, the protrusion 17 can be removed even more easily and cleanly.

The outer jaw portion 15 according to the first embodiment is provided with a seating surface 16, and the connecting portion 16A is provided at the edge of the seating surface 16. Furthermore, when the insulator main body 11 is disposed with the seating surface 16 facing downward, the protrusion 17 projects diagonally downward from the edge toward the outside of the seating surface 16. Thereby, the protrusion 17 can be easily removed in the removal process by simply adjusting the direction in which the protrusion 17 protrudes. Therefore, the process of removing the protrusion 17 can be simplified, and the process of manufacturing the rotating electrical machine can be simplified. Further, as a result, the removed protrusion 17 comes off toward the outside of the stator 40. Therefore, it can be easily confirmed whether or not the protrusion 17 has been reliably removed. Therefore, the process of removing the protrusion 17 can be simplified, and the manufacturing process of the rotating electrical machine can be simplified.

Insulator main body 11 and protrusion 17 according to the first embodiment are resin molded products, and protrusion 17 includes a gate formed during resin molding. This makes it possible to reduce the amount of resin required to create the protrusion 17. Therefore, the material cost of the first insulator 10A can be reduced. Furthermore, this eliminates the need to remove gates and runners when molding the first insulator 10A. Thereby, the manufacturing process of the first insulator 10A can be simplified. Further, there is no need to design and manufacture a mold including the protrusion 17. Thereby, the design and manufacturing cost of the first insulator 10A can be reduced. Moreover, the first insulator 10A and the second insulator 10B can be manufactured using one mold. It is possible to select whether or not to remove the gate and runner corresponding to the protrusion 17 as needed. Therefore, the design and manufacturing cost of the first insulator 10A and the second insulator 10B can be reduced.

The insulator body 11 according to the first embodiment has a core contacting surface 12 that overlaps the core block 42 . Further, a guide groove 18 extending from the core contact surface 12 toward the protrusion 17 is provided. Thereby, the flow of varnish 46 can be concentrated at one point on protrusion 17. Therefore, it is not necessary to provide a plurality of protrusions 17, and the manufacturing cost of the first insulator 10A, including the reduction in the amount of resin material used in the first insulator 10A, can be reduced. Further, as a result, the fluid varnish 46 gathers in the guide groove 18 and flows toward the protrusion 17 . Therefore, unnecessary dripping of the varnish 46 can be encouraged.

The width of the guide groove 18 according to the first embodiment becomes narrower from the core contacting surface 12 toward the protrusion 17 . As a result, the fluid varnish 46 gathers more in the guide groove 18 and flows toward the protrusion 17 . Therefore, unnecessary dripping of the varnish 46 can be further encouraged.

A plurality of guide grooves 18 are formed in the insulator main body 11 according to the first embodiment. As a result, the fluid varnish 46 gathers more in the guide groove 18 and flows toward the protrusion 17 . Therefore, unnecessary dripping of the varnish 46 can be further encouraged.

According to the method for manufacturing a rotating electric machine according to the first embodiment, in the varnish curing process, the plurality of stator units 41 are maintained in a posture such that each protrusion 17 faces downward. As a result, the fluid varnish 46 flows toward the protrusion 17 of the first insulator 10A disposed below. Therefore, unnecessary dripping of the varnish 46 can be encouraged. Therefore, the method for manufacturing the rotating electric machine can be simplified.

According to the method for manufacturing a rotating electrical machine according to the first embodiment, in the removal step, the plurality of stator units 41 are placed on the mounting surface 50 with each protrusion 17 facing downward, so that each protrusion is removed. The portion 17 is broken and removed from each insulator body 11. Thereby, the protrusions 17 can be removed from each insulator body 11 simply by placing the plurality of annularly arranged stator units 41 on the mounting surface 50. Therefore, the method for manufacturing the rotating electric machine can be simplified.

Note that in the first insulator 10A of the first embodiment, a connecting portion 16A is provided in a part of the seating surface 16. However, it is not limited to this. For example, the seating surface 16 may not be provided on the outer jaw portion 15 . In this case, for example, the outer jaw portion 15 may be provided with a protruding portion having the connecting portion 16A as the apex. In the portion of the first insulator 10A excluding the protruding portion 17, the connecting portion 16A, which is the apex of the protruding portion, may be the most protruding portion when viewed from the core contacting surface 12. That is, when the insulator main body 11 is disposed on the core block 42, the connecting portion 16A, which is the apex of the protruding portion, overlaps the mounting surface 50, so that the core block 42 is placed on the mounting surface via the outer jaw portion 15. 50.

Furthermore, the insulator 10 of the first embodiment is provided with a pair of walls 12a. However, it is not limited to this. For example, the pair of walls 12a may not be provided. Furthermore, a locking portion may be provided on a portion of the core contacting surface 12. Even when the insulator 10 is fixed to the core block 42, the locking portion provided on a portion of the core contact surface 12 and the locking portion provided on a portion of the core block 42 are locked to each other. good.

Further, in the first insulator 10A of the first embodiment, the protrusion 17 is connected only to the outer jaw 15. However, it is not limited to this. For example, the protrusion 17 may be connected to the shaft-side jaw 14 . In this case, the configuration of the guide groove 18 formed on the first end surface 11a may be provided on the end surface provided on the shaft-side jaw portion 14. Furthermore, a protrusion 17 may be connected to each of the shaft side jaw 14 and the outer peripheral side jaw 15. In this case, the configuration of the guide groove 18 formed on the first end surface 11a may also be provided on the end surface provided on the shaft-side jaw portion 14. Further, at this time, when viewed from the core contacting surface 12, the insulator main body 11 only needs to exist inside a plane that includes each of the pair of connecting parts 16A provided on the shaft side jaw 14 and the outer peripheral side jaw 15. . That is, when the insulator main body 11 is placed on the core block 42, each of the pair of connecting portions 16A overlaps the mounting surface 50, so that the core block 42 is placed on the mounting surface 50 via the outer jaw portion 15. It may be possible to place it.

Moreover, the core block 42 of Embodiment 1 is constructed by laminating a plurality of plate members. However, it is not limited to this. For example, the core block 42 may be composed of one block member. Further, the core block 42 may be composed of a plurality of block members.

Further, the stator 40 of the first embodiment is configured by arranging a plurality of stator units 41 each made of each core block 42 in an annular shape. However, it is not limited to this. For example, a single annular core block may be used for the stator 40. In this case, the annular core block has an annular core back portion that constitutes an outer peripheral portion, and a plurality of teeth portions that protrude from the core back portion toward the axis along the radial direction. At this time, one tooth portion and a portion of the core back portion corresponding to the one tooth portion may be defined as one core block 42. Accordingly, a single annular core block may be defined as having a plurality of core blocks 42. Further, in this case, one stator unit 41 includes one core block 42, an insulator 10 disposed in one core block 42, and a coil 45C disposed in one core block 42. . That is, the stator 40 may be defined as having a plurality of stator units 41.

Further, the stator 40 of the first embodiment is configured by arranging a plurality of stator units 41 each made of each core block 42 in an annular shape. However, it is not limited to this. For example, a member in which core blocks are connected to each other and arranged in a line may be used. In this case, each core block 42 is connected to each other at the ends of their core back portions 42a. After the pair of insulators 10 and the coil 45C are arranged, each core block 42 is arranged in an annular shape by bending the connected end portion of the core back portion 42a. By arranging a plurality of core blocks 42 in a ring, a plurality of stator units 41 arranged in a ring are completed.

Further, the first insulator 10A of the first embodiment is used in the motor 33 used in the hoisting machine 30. However, it is not limited to this. The first insulator 10A may be used in a motor used for a purpose other than the hoisting machine 30, or a rotating electric machine.

Further, the protrusion 17 of the first embodiment is provided from the seating surface 16 to the edge of the seating surface 16 and the first end surface 11a. However, it is not limited to this. For example, the protrusion 17 may be provided on a portion other than the edge of the seating surface 16. Alternatively, it may be provided at the edge of the seating surface 16 and the first end surface 11a. In the removal process, as long as the protrusion 17 is removed, the protrusion 17 may be provided at an appropriate position.

Further, in the first embodiment, when the insulator main body 11 is disposed with the seating surface 16 facing downward, the protrusion 17 projects obliquely downward from the edge of the seating surface 16 toward the outside of the seating surface 16. ing. However, it is not limited to this. For example, the protrusion 17 may protrude diagonally downward toward the inside of the seating surface 16. In the removal process, as long as the protrusion 17 is removed, the protrusion 17 may be provided to protrude in an appropriate direction.

Further, the shape of the protrusion 17 in the first embodiment is cylindrical, and one end is tapered at the tip. However, it is not limited to this. The shape of the protrusion 17 can be set to any appropriate shape as long as the fluid varnish 46 collected on the protrusion 17 can be dripped without any problem.

Further, the cross-sectional area of the protrusion 17 in the first embodiment is such that the cross-sectional area of the first protrusion 17a is smaller than the cross-sectional area of the second protrusion 17b, and the cross-sectional area of the first protrusion 17a is smaller than the cross-sectional area of the second protrusion 17b. It becomes smaller as it goes from the second part 17b to the tip part connected to the connecting part 16A. However, it is not limited to this. The cross-sectional area of the protrusion 17 may be such that the protrusion 17 breaks during the removal process.

Moreover, the first insulator 10A of the first embodiment is shaped by an injection molding method. However, it is not limited to this. The first insulator 10A may be manufactured by any known suitable manufacturing method.

Further, the protruding portion 17 in the first embodiment is a gate and a runner shaped at a position corresponding to the sprue portion of the mold. However, it is not limited to this. For example, a component serving as the protrusion 17 may be molded. Alternatively, for example, a component serving as the protrusion 17 may be molded separately from the insulator body 11, and the protrusion 17 may be connected to the insulator body 11 before the varnish curing process. Thereby, the first insulator 10A and the second insulator 10B can use a common mold for forming the insulator body 11. Therefore, the cost of manufacturing the mold can be reduced.

Hereinafter, various aspects of the present disclosure will be collectively described as supplementary notes.

(Additional note 1)
An insulator body placed in the core block of a rotating electric machine,
a protrusion protruding from the insulator body;
Equipped with
The insulator main body is provided with an overhang portion in which a connection portion is formed,
When the insulator main body is disposed on the core block, the connecting portion overlaps the placement surface, so that the core block can be placed on the placement surface via the overhanging portion,
When the insulator main body is installed with the connecting portion facing downward in the vertical direction, the protruding portion projects downward from the connecting portion.
Insulator.
(Additional note 2)
The protrusion has a first protrusion part and a second protrusion part,
The second protrusion part is connected to the insulator main body via the first protrusion part,
The cross-sectional area of the first portion of the protrusion is smaller than the cross-sectional area of the second portion of the protrusion.
The insulator described in Appendix 1.
(Additional note 3)
The cross-sectional area of the first protrusion becomes smaller from the second protrusion toward the insulator body.
The insulator described in Appendix 2.
(Additional note 4)
The overhang portion is provided with a seating surface,
The connecting portion is provided at an edge of the seating surface,
When the insulator main body is disposed with the seating surface facing downward, the projection protrudes diagonally downward from the edge toward the outside of the seating surface.
The insulator according to any one of Supplementary notes 1 to 3.
(Appendix 5)
The insulator main body and the protrusion are resin molded products, and the protrusion includes a gate formed during resin molding.
The insulator according to any one of Supplementary notes 1 to 4.
(Appendix 6)
The insulator main body is formed with a core contacting surface that overlaps the core block,
The insulator main body is provided with a guide groove extending from the core contacting surface toward the protrusion.
The insulator according to any one of Supplementary notes 1 to 5.
(Appendix 7)
The width of the guide groove is narrowed from the core contacting surface toward the protrusion.
The insulator described in Appendix 6.
(Appendix 8)
A plurality of the guide grooves are formed in the insulator main body,
The insulator according to appendix 6 or appendix 7.
(Appendix 9)
By arranging the insulator body of the insulator according to any one of Supplementary Notes 1 to 8 on the core block, and arranging the coil on the core block via the insulator body, the core block, the insulator , and a unit assembly step of producing a plurality of stator units including the core block,
After the unit assembly step, a varnish curing step of impregnating the plurality of stator units with varnish and curing it;
a removal step of removing the protrusion from the insulator body after the varnish curing step;
It is equipped with
In the varnish curing step, the plurality of stator units are maintained in a posture with each of the protrusions facing downward;
In the removing step, the plurality of stator units are placed on the placement surface with each of the protrusions facing downward, so that each of the protrusions is broken and removed from each of the insulator bodies. ,
Manufacturing method for rotating electric machines.

Reference Signs List 10 insulator, 10A first insulator, 10B second insulator, 11 insulator main body, 11a first end surface, 12 core contact surface, 12a wall, 14 shaft side jaw, 15 outer peripheral side jaw, 16 seating surface, 16A connection section , 17 protrusion, 17a first protrusion, 17b second protrusion, 18 guide groove, 18a wide part, 18b narrow part, 30 hoist, 31 sheave, 32 housing, 32a opening, 32b central shaft, 33 motor, 34 rotor, 34a through hole, 34b outer circumferential surface, 34c magnet, 35 bearing, 36 cover, 36a cover through hole, 40 stator, 41 stator unit, 42 core block, 42a core back part, 42b teeth part , 45 winding wire, 45C coil, 46 varnish, 50 mounting surface, L rotation axis.

Claims (9)

An insulator body placed in the core block of a rotating electric machine,
a protrusion protruding from the insulator body;
Equipped with
The insulator main body is provided with an overhang portion in which a connection portion is formed,
When the insulator main body is disposed on the core block, the connecting portion overlaps the placement surface, so that the core block can be placed on the placement surface via the overhanging portion,
When the insulator main body is installed with the connecting portion facing downward in the vertical direction, the protruding portion projects downward from the connecting portion.
Insulator. The protrusion has a first protrusion part and a second protrusion part,
The second protrusion part is connected to the insulator main body via the first protrusion part,
The cross-sectional area of the first portion of the protrusion is smaller than the cross-sectional area of the second portion of the protrusion.
The insulator according to claim 1. The cross-sectional area of the first protrusion becomes smaller from the second protrusion toward the insulator body.
The insulator according to claim 2. The overhang portion is provided with a seating surface,
The connecting portion is provided at an edge of the seating surface,
When the insulator main body is disposed with the seating surface facing downward, the projection protrudes diagonally downward from the edge toward the outside of the seating surface.
The insulator according to claim 1. The insulator main body and the protrusion are resin molded products, and the protrusion includes a gate formed during resin molding.
The insulator according to claim 1. The insulator main body is formed with a core contacting surface that overlaps the core block,
The insulator main body is provided with a guide groove extending from the core contacting surface toward the protrusion.
The insulator according to claim 1. The width of the guide groove is narrowed from the core contacting surface toward the protrusion.
The insulator according to claim 6. A plurality of the guide grooves are formed in the insulator main body,
The insulator according to claim 6. By arranging the insulator body of the insulator according to any one of claims 1 to 8 in the core block, and arranging the coil in the core block via the insulator body, the core block, a unit assembly step of producing a plurality of stator units including the insulator and the core block;
After the unit assembly step, a varnish curing step of impregnating the plurality of stator units with varnish and curing it;
a removal step of removing the protrusion from the insulator body after the varnish curing step;
It is equipped with
In the varnish curing step, the plurality of stator units are maintained in a posture with each of the protrusions facing downward;
In the removing step, the plurality of stator units are placed on the placement surface with each of the protrusions facing downward, so that each of the protrusions is broken and removed from each of the insulator bodies. ,
Manufacturing method for rotating electric machines.