JP2013153591A - Stator, and identification method of core element sub-assembly thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator configured by combining a plurality of stator core elements in which a plurality of core element sub-assemblies can be identified in the automatic manufacturing process, and to provide an identification method of a plurality of core element sub-assemblies.SOLUTION: In the strut on the anti-terminal side of a plurality of core element sub-assemblies, identified parts 28, 29 where the "pattern of space or solid" is different in each core element sub-assembly are provided. In the W-phase core element sub-assembly 201, for example, a first identified part 28 of a strut 261 is a notch 281, and a second identified part 29 is a blank 290. In other core element sub-assembly, the first and second identified parts 28, 29 have different patterns. Consequently, an identification device recognizes the difference of space or solid pattern of the identified parts 28, 29 in the automatic manufacturing process, and can identify a plurality of core element sub-assemblies.

Description

  The present invention relates to a stator of a brushless motor and a method for identifying a plurality of core element subassemblies constituting the stator.

2. Description of the Related Art Conventionally, a brushless motor that rotates a rotor provided inside a stator by controlling energization of a winding wound around a stator core and continuously switching a magnetic field is known.
On the other hand, as a configuration for identifying parts that are similar to each other, for example, Patent Document 1 discloses that the angle formed by the key and the key groove provided on the plug and the receptacle can be made different from each other so that only a predetermined partner can be coupled. The structure of the electrical connector assembly is disclosed.

JP-A-4-259769

  By the way, the structure which manufactures the stator of a brushless motor combining several stator elements is assumed. For example, a stator of a three-phase brushless motor is manufactured by combining three stator elements wound with windings for each phase. Here, the stator element before winding the winding is referred to as a core element subassembly.

In the process of manufacturing a stator having such a configuration, it is necessary to identify a plurality of core element subassemblies or a plurality of stator elements from each other in order to prevent erroneous assembly and improve work efficiency. In addition, if the core element subassembly or stator element has a substantially rotationally symmetric shape and may be erroneously set on an assembly jig or the like at a position rotated from the normal position, identification of the rotational direction is also necessary. Become.
Furthermore, in order to automate the manufacturing process, it is required that such an identification is not made visually by an operator but can be identified by an identification device that is a hardware resource.

  In the electrical connector assembly of Patent Document 1, when there are a plurality of plugs and receptacles, an attempt is made to connect an arbitrary plug and receptacle, and it is only guaranteed that the combination is correct if it can be combined. That is, it is necessary to repeat connection attempts with trial and error until the correct combination is reached. Therefore, when trying to apply to the manufacturing process, the process time varies depending on the number of trials, and particularly in the automatic manufacturing process, there is a problem that the process is not stable.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a stator in which a plurality of core element subassemblies can be identified by an automatic manufacturing process in a stator configured by combining a plurality of stator elements. And providing a method of identifying a core element subassembly.

The present invention is an invention relating to a stator of a brushless motor configured by combining a plurality of stator elements and rotating a rotor by a rotating magnetic field generated by energizing a winding.
The stator includes a winding, a plurality of divided cores, and an insulator.
The plurality of split cores include an annular portion that extends in the circumferential direction and forms an annular outer edge, and a teeth portion that radially protrudes radially inward from the annular portion.
The insulator includes an annular covering portion for insulatingly covering the annular portion, a teeth covering portion for insulatingly covering the tooth portion and winding the winding, and an annular covering portion exceeding the axial height of the wound winding. A column portion extending from the end surface in the axial direction is provided.
The plurality of divided cores are insulatively covered by an insulator with one or more divided cores as a unit, and constitute a plurality of core element subassemblies corresponding to a state before windings are wound around the plurality of stator elements.
The column portion is provided with an identified portion in which the pattern of whether it is space or solid differs for each core element subassembly.

  As a result, in the automatic manufacturing process, the identification device, which is a hardware resource, can recognize the difference in space or solid pattern of the identified portion and identify a plurality of core element subassemblies. Moreover, since the support | pillar part in which a to-be-identified part is formed does not wind a coil | winding, it can identify similarly about the stator element after a coil | winding was wound by the core element subassembly.

As a specific example, the identified part includes a “notch” formed inside the outer wall of the support column in one of the core element subassemblies, and a solid corresponding to the notch in the other core element subassemblies. Consists of blanks.
Moreover, it is preferable that the notch is formed so that it may penetrate the support | pillar part in the circumferential direction.

The present invention further provides a method for identifying a core element subassembly.
This identification method includes a step of determining whether or not the detection medium provided from the outside interferes with the identified portion.
Specifically, when the identified portion includes a notch penetrating the support column in the circumferential direction and a blank corresponding to the notch, the identified portion is provided on one of the extension lines in the notch penetrating direction. It is possible to provide an identification method including a step of determining whether or not the light emitted from the light emitting unit is detected by the light receiving unit provided on the other side of the extension of the notch in the penetrating direction.

It is an axial sectional view of a fuel pump using a stator of a brushless motor according to an embodiment of the present invention. It is an II direction arrow line view of FIG. It is the III-III sectional view taken on the line of FIG. It is a wiring connection diagram. It is a schematic diagram which shows the wiring layout of a coil | winding. It is a perspective view before the resin mold of the stator by one Embodiment of this invention. It is the VII-VII sectional view taken on the line of FIG. 6 of the state which attached the stator element. 7A is a plan view of a W-phase stator element, and FIG. 7B is a sectional view taken along line VIII-VIII in FIG. 6. FIG. 7A is a plan view of a V-phase stator element, and FIG. 7B is a cross-sectional view taken along line IX-IX in FIG. 6. FIG. 7A is a plan view of a U-phase stator element, and FIG. 7B is a sectional view taken along line XX in FIG. 6. It is a three-plane figure which shows the support | pillar part of the non-terminal side of the W-phase core element subassembly by one Embodiment of this invention. It is a three-plane figure which shows the support | pillar part of the non-terminal side of the V phase core element subassembly by one Embodiment of this invention. It is a three-plane figure which shows the support | pillar part of the non-terminal side of the U-phase core element subassembly by one Embodiment of this invention. It is a schematic diagram explaining the identification method of the W phase core element subassembly by one Embodiment of this invention. It is a schematic diagram explaining the identification method of the V phase core element subassembly by one Embodiment of this invention. It is a schematic diagram explaining the identification method of the U-phase core element subassembly by one Embodiment of this invention. 5 is a determination table used in a core element subassembly identification method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(One embodiment)
An embodiment in which a brushless motor including a stator according to an embodiment of the present invention is used as a motor part of a fuel pump will be described with reference to FIGS.

First, the overall configuration of the fuel pump will be described with reference to FIGS.
The fuel pump 1 sucks fuel in a fuel tank (not shown) from a suction port 61 shown in the lower part of FIG. 1, and discharges it to an internal combustion engine from a discharge port 78 shown in the upper part of FIG. The fuel pump 1 is roughly divided into a motor part 3 as a “brushless motor” and a pump part 4, and an outer shell is constituted by a housing 19, a pump cover 60, a cover end 40, and the like. In the following description of the fuel pump 1, the upper side of FIG. 1 is represented as “the discharge port 78 side” and the lower side of FIG. 1 is represented as “the suction port 61 side”.

The housing 19 is formed in a cylindrical shape from a metal such as iron.
The pump cover 60 closes the end of the housing 19 on the inlet 61 side. The pump cover 60 is fixed on the inner side of the housing 19 by crimping the end edge of the housing 19 on the suction port 61 side inward, and is prevented from coming off in the axial direction.
The cover end 40 is molded of resin and closes the end of the housing 19 on the discharge port 78 side. The cover end 40 is fixed on the inner side of the housing 19 by crimping the edge of the end portion on the discharge port 78 side of the housing 19 to the inner side, and is prevented from coming off in the axial direction.

A cylindrical portion 41 protruding upward in FIG. 1 is formed outside the cover end 40. A discharge port 78 is formed at the end of the tube portion 41, and a discharge passage 77 communicating with the discharge port 78 is formed inside the tube portion 41.
On the inner side of the cover end 40, a cylindrical portion 42 that protrudes in a cylindrical shape toward the rotor 50 is formed on the central axis. A bearing 55 is fitted inside the cylindrical portion 42.

Next, a schematic configuration of the motor unit 3 will be described. The motor unit 3 includes a stator 10, a rotor 50, a shaft 52, and the like.
The stator 10 has a cylindrical shape and is accommodated inside the housing 19. The stator 10 includes a core 11, an insulator 21, a winding 30, terminals 331, 332, and 333. The core 11 is made of a magnetic material such as iron. The insulator 21 is formed by inserting the core 11 and resin molding, and insulates the winding 30 from the core 11. The inner wall surface of the core 11, that is, the surface facing the rotor 50 is not resin-molded and the metal surface is exposed.
In the present embodiment, the stator 10 is configured by combining three stator elements. Details of this will be described later.

The winding 30 is wound around a core subassembly 20 in which the core 11 is resin-molded and insulated by an insulator 21. The insulator 21 holds the core 11 and the winding 30 while insulating them. The winding 30 is, for example, a copper wire whose surface is covered with an insulating film.
The core subassembly 20 around which the winding 30 is wound is further integrally molded by the resin mold portion 16.

  As shown in FIG. 3, the core 11 of the present embodiment includes six divided cores 111 to 116. Each of the split cores 111 to 116 has an annular portion 12 that forms an annular outer edge, and a teeth portion 13 that protrudes radially from the annular portion 12 in the radially inward direction. Further, six slots 14 penetrating in the axial direction are formed between the tooth portions 13 of the divided cores 111 to 116 adjacent to each other.

  In this embodiment, the split cores 111 to 116 are insulated and covered by the insulator 21 with a pair of split cores facing each other across the central axis as a unit to constitute a core element subassembly. That is, in this embodiment, the core subassembly 20 is comprised from the three core element subassemblies 201-203. Further, a winding is wound around each of the core element subassemblies 201 to 203 to constitute a stator element described later.

The winding 30 is continuously concentrated and wound around the teeth 13 of the divided cores 111 to 116 through the slots 14. The winding 30 concentratedly wound around the tooth portion 13 is represented as coils 321 to 326. As shown in FIG. 4, the “winding 30” includes coils 321 to 326 and connecting wires 311 to 316 described later.
Here, it supplements about illustration of FIG. 1 is a cross-sectional view taken along the line II of FIG. 2 and FIG. 3, the left half of FIG. 1 shows the cross section of the split core 112 around which the coil 322 is wound, and the right half of FIG. The cross section of the wound divided core 115 is shown.

The rotor 50 is rotatably accommodated inside the stator 10. The rotor is provided with a magnet 54 around the iron core 53. As shown in FIG. 3, in the magnet 54, N poles 541 and S poles 542 are alternately arranged in the circumferential direction. In the present embodiment, as an example, the N pole 541 and the S pole 542 are provided as four pole pairs, for a total of eight poles.
The shaft 52 is press-fitted and fixed in a shaft hole 51 formed on the central axis of the rotor 50, and rotates together with the rotor 50.

  The terminals 331, 332, and 333 are provided at positions that do not interfere with the cylindrical portion 41 of the cover end 40, and project in the axial direction. In this embodiment, the terminal 331 corresponds to the W phase, the terminal 332 corresponds to the V phase, and the terminal 333 corresponds to the U phase terminal. As shown in FIG. 4, the windings 30 of the respective phases are connected to the terminals 331, 332, and 333, and three-phase power from a driving device (not shown) is supplied to the windings 30 through the terminals 331, 332, and 333. . When electric power is supplied to the winding 30, a rotating magnetic field is generated in the stator 10, and the rotor 50 rotates together with the shaft 52.

Returning to FIG. 1, the configuration of the pump unit 4 will be described next.
The pump cover 60 has a cylindrical suction port 61 that opens downward in FIG. A suction passage 62 that penetrates the pump cover 60 in the plate thickness direction is formed inside the suction port 61.
A pump casing 70 is provided in a substantially disc shape between the pump cover 60 and the stator 10. A hole 71 that penetrates the pump casing 70 in the plate thickness direction is formed at the center of the pump casing 70. A bearing 56 is fitted in the hole 71 of the pump casing 70. The bearing 56 rotatably supports both axial sides of the shaft 52 together with the bearing 55 fitted in the cover end 40. Thereby, the rotor 50 and the shaft 52 are rotatable with respect to the cover end 40 and the pump casing 70.

  The impeller 65 is formed in a substantially disk shape with resin. The impeller 65 is accommodated in a pump chamber 72 between the pump cover 60 and the pump casing 70. The end portion of the shaft 52 on the pump chamber 72 side has a “D shape” in which a part of the outer wall is cut, and is fitted into a corresponding D shape hole 66 formed in the center portion of the impeller 65. It is. As a result, the impeller 65 rotates in the pump chamber 72 by the rotation of the shaft 52.

  A groove 63 connected to the suction passage 62 is formed on the surface of the pump cover 60 on the impeller 65 side. A groove 73 is formed on the surface of the pump casing 70 on the impeller 65 side. A passage 74 that penetrates the pump casing 70 in the plate thickness direction communicates with the groove 73. A blade portion 67 is formed in the impeller 65 at a position corresponding to the groove 63 and the groove 73.

  When the impeller 65 rotates together with the rotor 50 and the shaft 52 by supplying electric power to the winding 30 of the motor unit 3, the fuel outside the fuel pump 1 is guided to the groove 63 via the suction port 61. The fuel guided to the groove 63 is guided to the groove 73 while being pressurized by the rotation of the impeller 65. The pressurized fuel flows through the passage 74 and is guided to the intermediate chamber 75 on the motor unit 3 side of the pump casing 70. Then, the intermediate chamber 75 reaches a discharge passage 77 via a fuel passage that cuts through the motor unit 3 and is discharged from a discharge port 78.

  In the present embodiment, two fuel passages are formed that run vertically through the motor unit 3. The first fuel passage includes a passage 761 between the outer wall of the rotor 50 and the inner wall of the stator 10, and a passage 762 between the outer wall of the cylindrical portion 42 of the cover end 40 and the inner wall of the central ring portion 24 of the insulator 21. Via. Further, the second fuel passage 79 passes between the outer wall of the stator 10 and the inner wall of the housing 19.

Next, the configuration of the stator 10 will be described with reference to FIGS.
First, connection of the winding 30 which is an electrical configuration will be described with reference to FIGS. 4 and 5.
As shown in FIG. 4, in the present embodiment, the three-phase winding 30 forming the magnetic circuit of the stator 10 is delta-connected, and two coils are connected in series between the terminals of each phase.
Specifically, a W-phase first coil 321, a jumper wire 311, a W-phase second coil 324 and a jumper wire 312 are connected in series in this order between the W-phase terminal 331 and the V-phase terminal 332.
In addition, a V-phase first coil 322, a jumper 313, a W-phase second coil 325, and a jumper 314 are connected in series in this order between the V-phase terminal 332 and the U-phase terminal 333.
Further, between the U-phase terminal 333 and the W-phase terminal 331, a U-phase first coil 323, a jumper 315, a U-phase second coil 326, and a jumper 316 are connected in series in this order.

  FIG. 5 is a schematic diagram showing a wiring layout of windings corresponding to the connection diagram of FIG. Here, the arrow in the figure indicates the winding direction. As shown in FIG. 5, for example, the winding can be written with a single stroke until starting from the W-phase terminal 331 and returning to the W-phase terminal 331.

Next, the mechanical configuration of the stator 10 will be described with reference to FIGS.
As shown in FIGS. 6 and 7, the stator 10 of the present embodiment is configured by combining three stator elements 101, 102, and 103. The stator elements 101, 102, and 103 are obtained by winding a winding 30 around three core element subassemblies 201, 202, and 203, respectively. Specifically, as shown in FIGS. 8 to 10, the stator element 101 includes W-phase split cores 111 and 114, the stator element 102 includes V-phase split cores 112 and 115, and the stator element 103 includes a U-phase split core. Cores 113 and 116 are included.

Each of the core element subassemblies 201, 202, and 203 includes an annular covering portion 22, a teeth covering portion 23, a central annular portion 24 (241, 242, 243), and the like.
The annular covering portion 22 covers the annular portion 12 of the core 11, and the teeth covering portion 23 covers the teeth portion 13 of the core 11. A winding 30 is wound around the teeth covering portion 23 to form coils 321 to 326. Between the coils 321 to 326, connecting wires 311 to 316 that connect the coils in the circumferential direction or connect the coil and the terminal are wired.
In the center ring portions 241, 242, and 243, the crossover wire holding portions 25 that hold the crossover wires 311 to 316 are formed along the outer periphery. Note that the center ring portion 243 of the U-phase core element subassembly 203 shown in FIG. 10 is formed in a semi-annular shape.

  The central ring portions 241, 242, 243 of the core element subassemblies 201, 202, 203 are formed on the inner side in the radial direction of the core 11 so as to have different heights in the axial direction. Specifically, the three core element subassemblies 201, 202, and 203 are combined by forming the central ring portions 241, 242, and 243 in this order from the lower side and stacking them.

A first holding groove 35 that holds the winding start portion of the winding 30 and a second holding groove 36 that holds the winding end portion of the winding 30 are formed in the annular covering portion 22.
The annular covering portion 22 is provided with a column portion 26 that protrudes from the axial end surface. The support column 26 extends beyond the axial height of the coils 321 to 326 wound around the teeth covering unit 23. In FIG. 1, a reference numeral “26” is added to generalize the column parts, and in FIGS. 6 to 10, reference numerals “261, 262, 263, 260” indicating individual column parts for each core element subassembly are attached. doing.

Next, the structure of the to-be-identified parts 28 and 29 of the support | pillar part 26 which is the characteristic structure of this invention is demonstrated with reference to FIGS. FIGS. 11-13 show the “opposite side” struts 261, 262, 263 of the three core element subassemblies 201, 202, 203, respectively. The column portions 261, 262, 263 "on the opposite terminal side" are shown on the left side in the plan and sectional views of FIGS. Moreover, it is shown in three places on the near side in the perspective view of FIG.
On the other hand, the support 260 on the “terminal (331, 332, 333) side” of each of the core element subassemblies 201, 202, 203 is shown on the right side in the plan and sectional views of FIGS. Moreover, it is shown by three places on the other side in the perspective view of FIG.

  As shown in FIGS. 11 to 13, the post portions 261, 262, and 263 on the opposite terminal side are different in the presence or absence of a radially outer notch 281 and an inner notch 291. The notches 281 and 291 are formed inside the outer walls of the corresponding column portions 261, 262, and 263 and penetrate the corresponding column portions 261, 262, and 263 in the circumferential direction. In the present embodiment, the notches 281 and 291 are formed from the upper ends of the corresponding support columns 261, 262, and 263 to the intermediate position in the height direction.

“A portion in which the notches 281 and 291 are formed in any of the pillar portions 261, 262, and 263 and the notches 281 and 291 are not formed in the other pillar portions” is referred to as “identified portion”. Here, the solid portion where the notches 281 and 291 are not formed is referred to as “blanks 280 and 290”.
Accordingly, the first identified portion 28 on the outer side in the radial direction of the column portions 261, 262, 263 on the opposite terminal side is either the notch 281 or the blank 280, and the second identified portion 29 on the inner side in the radial direction. Is either a notch 291 or a blank 290.

Specifically, the configuration is as follows.
The column portion 261 on the opposite terminal side of the W-phase core element subassembly 201 shown in FIG. 11 has an outer notch 281 and does not have an inner notch 291. In other words, the first identified portion 28 is the notch 281, and the second identified portion 29 is the blank 290.
The column portion 262 on the opposite terminal side of the V-phase core element subassembly 202 shown in FIG. 12 does not have the outer cutout 281 but has the inner cutout 291. In other words, the first identified portion 28 is a blank 280 and the second identified portion 29 is a notch 291.
The column portion 263 on the opposite terminal side of the U-phase core element subassembly 203 shown in FIG. 13 has both an outer notch 281 and an inner notch 291. In other words, the first identified portion 28 is a notch 281, and the second identified portion 29 is a notch 291.

  Further, as shown in FIGS. 8 to 10, the terminal-side column 260 of all the core element subassemblies 201, 202, 203 does not have the outer notch 281 and the inner notch 291. In other words, the first identified portion 28 is a blank 280 and the second identified portion 29 is a blank 290.

  Supplementally, the notches 281 and 291 of each support column are formed at positions that are not covered by the coil 32 wound around the teeth covering portion 23 in the height direction. Therefore, the above description is not limited to the core element subassemblies 201, 202, and 203 before the coil 32 is wound around the teeth covering portion 23, but is applied to the teeth covering portion 23 as shown by broken lines in FIGS. The same applies to the “stator elements 101, 102, 103” after the coil 32 is wound.

  Next, with reference to FIGS. 14 to 17, a method for identifying the three core element subassemblies 201, 202, and 203 and identifying the direction in which the core element subassemblies are set in the receiving jig will be described. In this identification method, a light beam is used as a “detection medium”, and whether or not the light can be transmitted is detected by a photoelectric sensor, thereby determining whether the identified parts 28 and 29 are notches or blanks. is there. As the light beam, for example, infrared light, laser light, or the like can be used.

The two sets of photoelectric sensors include light emitting units 951 and 952 and light receiving units 961 and 962.
Here, the center line of the column portions 261, 262, and 263 passing through the center axis of the core element subassemblies 201, 202, and 203 is defined as a virtual center line x. Then, the 1st light emission part 951 and the 2nd light emission part 952 are the direction orthogonal to the virtual centerline x with respect to the 1st to-be-identified part 28 and the 2nd to-be-identified part 29, respectively, ie, the penetration direction of the notches 281 and 291. Is provided on one of the extension lines. In addition, the first light receiving unit 961 and the second light emitting unit 962 are provided on the other side of the extension line in the penetration direction of the notches 281 and 291 with respect to the first identified unit 28 and the second identified unit 29, respectively.

  When the identified parts 28 and 29 are the notches 281 and 291, the light beams emitted from the light emitting parts 951 and 952 are detected by the light receiving parts 961 and 962 without interference. On the other hand, when the identified parts 28 and 29 are blanks 280 and 290, the light beams emitted from the light emitting parts 951 and 952 interfere with the blanks 280 and 290 and are not detected by the light receiving parts 961 and 962. Accordingly, when the light receiving units 961 and 962 detect “ON” and when not detected “OFF”, the determination table shown in FIG. 17 arranges them.

  Thereby, in this embodiment, a plurality of core element subassemblies 201, 202, and 203 can be distinguished from each other. Further, for example, when the terminal-side column portion is to be set to the front, when the terminal-side column portion is erroneously set to the front, an error can be determined. Therefore, it is possible to prevent the generation of defective products particularly in the automatic manufacturing process and to ensure stable quality.

Further, in the present embodiment, the notches 281 and 291 constituting the “identified part” are formed inside the outline of the corresponding column part. Therefore, it is possible to avoid interference with parts, jigs, and the like during the assembly work, as compared with a configuration in which the identified portion is configured by the presence or absence of “projections” formed on the outer side of the outer shell.
Furthermore, since the notches 281 and 291 penetrate the corresponding support columns in the circumferential direction, the light emitting units 951 and 952 and the light receiving units 961 and 962 are arranged without interfering light blocking interferences. can do.
Therefore, it is advantageous to use a non-contact type detection medium such as a light beam. Note that a non-contact type detection medium is preferable as compared with a contact type detection medium because there is no risk of damaging the product and the product itself does not wear.

(Other embodiments)
(A) As a specific shape constituting the “identified part”, a “through hole” penetrating through the center of the column part may be used instead of the “notch”. Since the through hole is formed inside the outer wall of the support column, it is possible to avoid interference with parts, jigs, and the like during assembly work. If there is no problem of interference during the assembly work, the “identified portion” may be constituted by “projections”.

  (A) The “detection medium” for detecting the presence or absence of interference in the detected part may be a noncontact type or a contact type. For example, the rod may be advanced toward the identified portion to determine whether or not to interfere. In this case, for example, the detection medium may be applied from the radially outward direction, with the notch and the extending direction of the hole constituting the detected portion being the radial direction. Moreover, the notch and the hole do not need to penetrate.

(C) In the above embodiment, the three core element subassemblies 201, 202, and 203 and the three stator elements 101, 102, and 103 are identified. However, the number of elements to be identified is not limited to this.
Moreover, in the said embodiment, although it determines from the detection result in the two to-be-identified parts 28 and 29, the number of to-be-identified parts and the pattern of a combination are not restricted to this.

(D) The configuration of the motor unit 3 other than the stator 10 and the configuration of the fuel pump other than the motor unit 3 are not limited to the above embodiment.
(E) The stator according to the present invention is not limited to a brushless motor for a fuel pump, but can be used for other fluid pumps or any device using a rotational driving force.
As mentioned above, this invention is not limited to such embodiment, In the range which does not deviate from the meaning of invention, it can implement with a various form.

3 ... Motor part (brushless motor),
10: Stator,
101, 102, 103 ... stator elements,
111-116 ... split core,
12 ... annular part, 13 ... teeth part,
201, 202, 203 ... core element subassembly,
21 ・ ・ ・ Insulator,
22 ... annular covering part, 23 ... teeth covering part,
26, 261, 262, 263, 260 ... struts,
28, 29...
30: Winding, 50: Rotor.

Claims (5)

A stator (10) of a brushless motor (3) configured by combining a plurality of stator elements (101, 102, 103) and rotating the rotor (50) by a rotating magnetic field generated by energizing the winding (30). There,
Windings,
A plurality of split cores (111 to 116) having an annular part (12) extending in the circumferential direction and constituting an annular outer edge, and a tooth part (13) projecting radially inward from the annular part;
An annular covering portion (22) for insulatingly covering the annular portion, a teeth covering portion (23) for insulatingly covering the tooth portion and wound with the winding, and an axial height of the wound winding An insulator (21) having a post portion (26) extending from the axial end surface of the annular covering portion beyond
With
The plurality of split cores are insulated by the insulator with one or more of the split cores as a unit, and a plurality of core element subs corresponding to a state before the winding is wound around the plurality of stator elements Constituting the assembly (201, 202, 203),
The stator is characterized in that a pattern of whether it is a space or a solid is provided with an identified part (28, 29) for each of the core element subassemblies.   The identified portion corresponds to the notch (281, 291) formed inside the outer wall of the support column in any one of the core element subassemblies, and the notch in the other core element subassemblies. 2. Stator according to claim 1, characterized in that it consists of solid blanks (280, 290).   The stator according to claim 2, wherein the notch is formed so as to penetrate the column portion in a circumferential direction. A method for identifying a plurality of the core element subassemblies in the stator according to any one of claims 1 to 3,
A method for identifying a core element subassembly, comprising: determining whether or not a detection medium provided from outside interferes with the identified portion. A method for identifying a plurality of said core element subassemblies in a stator according to claim 3,
A light receiving portion (961, 962) provided on the other side of the notch extending in the penetrating direction is emitted from a light emitting portion (951, 952) provided on one of the extending portions in the penetrating direction of the notch. A method of identifying a core element subassembly, comprising the step of determining whether or not to detect the core element subassembly.

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