WO2022264615A1 - ステーターユニットおよび電動弁、ならびに、ステーターユニットの製造方法 - Google Patents
ステーターユニットおよび電動弁、ならびに、ステーターユニットの製造方法 Download PDFInfo
- Publication number
- WO2022264615A1 WO2022264615A1 PCT/JP2022/014735 JP2022014735W WO2022264615A1 WO 2022264615 A1 WO2022264615 A1 WO 2022264615A1 JP 2022014735 W JP2022014735 W JP 2022014735W WO 2022264615 A1 WO2022264615 A1 WO 2022264615A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- yoke
- phase
- stator unit
- pole teeth
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 237
- 229920005989 resin Polymers 0.000 claims abstract description 237
- 230000002093 peripheral effect Effects 0.000 claims description 41
- 238000007789 sealing Methods 0.000 claims description 17
- 238000005192 partition Methods 0.000 abstract 2
- 238000000465 moulding Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 229920010524 Syndiotactic polystyrene Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920001955 polyphenylene ether Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/145—Stator cores with salient poles having an annular coil, e.g. of the claw-pole type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/525—Annular coils, e.g. for cores of the claw-pole type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
- H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
- H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
Definitions
- the present invention relates to a stator unit, an electrically operated valve having the stator unit, and a method for manufacturing the stator unit.
- Patent Document 1 discloses a conventional stator unit for an electrically operated valve.
- the stator unit of Patent Literature 1 has two yokes having a hollow ring shape and a resin cover.
- the two yokes are coaxially arranged and in contact with each other.
- the cover contains two yokes.
- the two yokes are integrated with the resin member.
- the resin member has two portions arranged in the internal spaces of the two yokes, and a terminal support portion extending radially outward from the opening arranged across the two yokes.
- the terminal support portion connects two portions arranged in the internal spaces of the two yokes.
- the two yokes have pole teeth. A plurality of pole teeth are arranged in the circumferential direction on the inner circumference of each of the two yokes.
- the present invention provides a stator unit capable of suppressing entry of moisture into the internal space of the yoke and suppressing disconnection of the coil, an electrically operated valve having the stator unit, and a method of manufacturing the stator unit. aim.
- a stator unit includes a hollow ring-shaped yoke, a cylindrical bobbin disposed in the inner space of the yoke and around which a coil is wound, a first The stator unit has a resin portion and a second resin portion, wherein the yoke has a plurality of pole teeth, the plurality of pole teeth are arranged in a circumferential direction on an inner periphery of the yoke, and the second The first resin portion includes a filling portion that fills the inner space of the yoke, the second resin portion includes a sealing portion that fills the space between the plurality of pole teeth, and the bobbin includes the filling portion. and the sealing portion.
- the resin of the first resin portion can be molded at a lower pressure than the resin of the second resin portion.
- the resin of the second resin portion has higher fluidity than the resin of the first resin portion.
- the second resin portion further has an annular portion arranged on the inner peripheral edge of one end surface of the yoke, and the plurality of resin portion connection points arranged in the circumferential direction in the annular portion are: It is preferably connected to the sealing portion.
- the yoke includes a ring-shaped first plate portion, a ring-shaped second plate portion arranged parallel to and spaced from the first plate portion, and an inner portion of the first plate portion.
- a plurality of first pole teeth connected to the peripheral edge at right angles to the first plate portion and directed toward the second plate portion; a plurality of second pole teeth connected at right angles to each other and directed toward the first plate, wherein the first pole teeth and the second pole teeth alternate in the circumferential direction of the yoke.
- the annular portion is preferably arranged on the inner peripheral edge of the first plate portion.
- the stator unit further includes a resin cover, and the cover is integrally molded with an assembly having the yoke, the first resin portion, and the second resin portion, and the assembly is preferably accommodated.
- a motor operated valve includes the stator unit, a cylindrical can arranged inside the stator unit, and a magnet arranged inside the can. It is characterized by having a rotor and a valve body driven by the magnet rotor.
- a method of manufacturing a stator unit includes: a hollow ring-shaped yoke; A method for manufacturing a stator unit having a bobbin, a first resin portion, and a second resin portion, wherein the yoke has a plurality of pole teeth, and the plurality of pole teeth are formed on the inner circumference of the yoke.
- the first resin portion includes a filling portion filled in the inner space of the yoke
- the second resin portion includes a seal portion filled in the space between the plurality of pole teeth.
- the bobbin defines the filling portion and the sealing portion, and the second resin portion is molded with a resin to which pressure higher than that applied to the resin of the first resin portion is applied. do.
- the stator unit includes a hollow ring-shaped yoke, a cylindrical bobbin disposed in the inner space of the yoke and around which a coil is wound, a first resin portion, a second resin portion, have.
- the yoke has a plurality of pole teeth, and the plurality of pole teeth are arranged circumferentially on the inner circumference of the yoke.
- the first resin portion includes a filling portion that fills the internal space of the yoke.
- a second resin portion includes a sealing portion that fills spaces between the plurality of pole teeth.
- a bobbin defines a fill portion and a seal portion.
- the bobbin In the cavity of the mold used for molding the resin member, the bobbin is positioned between the inner space of the yoke corresponding to the filling portion of the first resin portion and the space between the plurality of pole teeth corresponding to the sealing portion of the second resin portion. and .
- the first resin portion and the second resin portion can be molded separately, and the molding conditions for the first resin portion and the molding conditions for the second resin portion can be set separately. Therefore, by molding the second resin portion with resin to which a pressure higher than the pressure applied to the resin of the first resin portion is applied, the resin can be appropriately filled between the plurality of pole teeth and the coil can be provided with a high pressure. Avoid applying pressure. Therefore, the stator unit of the present invention can suppress the entry of moisture into the internal space of the yoke and can suppress disconnection of the coil.
- FIG. 1 is a longitudinal sectional view of an electrically operated valve according to one embodiment of the present invention
- FIG. 2 is a perspective view of an assembly having a yoke and a resin member of the stator unit of the motor-operated valve of FIG. 1
- FIG. Figure 3 is a longitudinal cross-sectional view of the assembly of Figure 2; It is a longitudinal section of a yoke, a bobbin and a coil.
- 5 is a cross-sectional view illustrating a method of integrally molding the yoke, bobbin, coil, and resin member of FIG. 4;
- FIG. 5 is a diagram schematically showing the flow of resin in spaces between a plurality of pole teeth of a yoke when resin flows into the spaces from a plurality of locations;
- FIG. 5 is a diagram schematically showing the flow of resin in a space between a plurality of pole teeth of the yoke when resin flows into the space from one location;
- FIG. 1 A motor-operated valve according to one embodiment of the present invention will be described below with reference to FIGS. 1 to 7.
- FIG. 1 of this embodiment is used, for example, to adjust the refrigerant flow rate in a refrigeration cycle or the like.
- FIG. 1 is a vertical cross-sectional view of an electrically operated valve according to one embodiment of the present invention.
- 2 is a perspective view of an assembly including a yoke and a resin member of the stator unit of the motor-operated valve of FIG. 1.
- 3 is a longitudinal cross-sectional view of the assembly of FIG. 2;
- FIG. FIG. 4 is a longitudinal sectional view of the yoke, bobbin and coil.
- FIG. 4 shows the assembly of FIG. 2 before the resin members are molded.
- FIG. 5 is a cross-sectional view illustrating a method of integrally molding the yoke, bobbin, coil, and resin member shown in FIG. In FIG.
- FIG. 6 shows a case where resin flows into the space from a plurality of locations.
- FIG. 7 shows a case where resin flows into the space from one point. 5 to 7, arrows schematically indicate the flow of the resin.
- the motor operated valve 1 includes a valve body 10, a holder 20, a valve body support member 25, a can 30, a drive mechanism 40, a valve body 70, and a stator unit 80. and have
- the valve body 10 has a cuboid shape.
- the valve body 10 has a valve chamber 13 and a valve port 14 connected to the valve chamber 13 .
- the valve body 10 has a first passageway 17 and a second passageway 18 .
- One end of the first passage 17 is connected to the valve chamber 13 , and the other end of the first passage 17 opens to the left side surface 10 a of the valve body 10 .
- One end of the second passage 18 is connected to the valve chamber 13 via the valve port 14 , and the other end of the second passage 18 opens to the right side surface 10 b of the valve body 10 .
- the valve body 10 has a mounting hole 19 .
- the mounting hole 19 opens to the upper surface 10 c of the valve body 10 .
- a female thread is formed on the inner peripheral surface of the mounting hole 19 .
- the valve chamber 13 opens to the bottom surface 19 a of the mounting hole 19 .
- the holder 20 has a cylindrical shape.
- a male thread is formed on the lower portion of the outer peripheral surface of the holder 20 .
- the male thread of the holder 20 is screwed into the female thread of the mounting hole 19 of the valve body 10 .
- the holder 20 is attached to the valve body 10 with a screw structure.
- the valve body support member 25 has a cylindrical shape.
- the valve body support member 25 is arranged between the valve body 10 and the holder 20 inside the mounting hole 19 .
- a lower portion of the valve support member 25 is press-fitted into the valve chamber 13 through the mounting hole 19 .
- An annular flat surface 25a facing downward is formed on the outer peripheral surface of the valve body support member 25 .
- the annular flat surface 25 a abuts on the bottom surface 19 a of the mounting hole 19 .
- the valve body support member 25 supports the valve body 70 so as to be vertically movable.
- the can 30 has a cylindrical shape with a closed upper end and an open lower end. A lower end portion of the can 30 is joined to an outer peripheral edge of an annular plate-shaped joining member 35 . An upper portion of the holder 20 is arranged inside the joint member 35 . The inner peripheral edge of the joining member 35 is joined to the holder 20 .
- the drive mechanism 40 moves the valve body 70 vertically.
- the drive mechanism 40 has a magnet rotor 41 , a planetary gear mechanism 50 , a guide member 60 , a drive shaft 65 and balls 68 .
- the magnet rotor 41 has a cylindrical shape. N poles and S poles are alternately arranged in the circumferential direction on the outer peripheral surface of the magnet rotor 41 .
- the outer diameter of the magnet rotor 41 is smaller than the inner diameter of the can 30 .
- the magnet rotor 41 is rotatably arranged inside the can 30 .
- a disk-shaped connecting member 42 is joined to the upper end of the magnet rotor 41 .
- the connecting member 42 closes the upper end of the magnet rotor 41 .
- a rotor shaft 43 passes through the center of the connecting member 42 .
- the magnet rotor 41 is connected to a rotor shaft 43 via a connecting member 42 .
- the planetary gear mechanism 50 is arranged inside the magnet rotor 41 .
- the planetary gear mechanism 50 has a gear case 51 , a fixed ring gear 52 , a sun gear 53 , a plurality of planetary gears 54 , a carrier 55 , an output gear 56 and an output shaft 57 .
- the gear case 51 has a cylindrical shape.
- the gear case 51 is coaxially joined to the upper end of the holder 20 .
- Fixed ring gear 52 is an internal gear.
- a fixed ring gear 52 is fixed to the upper end of the gear case 51 .
- the sun gear 53 is arranged coaxially with the connecting member 42 .
- the sun gear 53 is integrated with the connecting member 42 .
- a rotor shaft 43 passes through the sun gear 53 .
- the sun gear 53 rotates together with the magnet rotor 41 and the connecting member 42 .
- a plurality of planetary gears 54 are arranged between the fixed ring gear 52 and the sun gear 53 .
- the carrier 55 has a disk shape.
- a rotor shaft 43 passes through the center of the carrier 55 .
- Carrier 55 is rotatable around rotor axis 43 .
- the carrier 55 has a plurality of support shafts 55a.
- the multiple support shafts 55a rotatably support the multiple planetary gears 54 .
- the output gear 56 has a bottomed cylindrical shape.
- Output gear 56 is an internal gear.
- a plurality of planetary gears 54 are arranged between the output gear 56 and the sun gear 53 .
- the output shaft 57 has a cylindrical shape.
- the upper portion of the output shaft 57 is arranged in a hole formed in the bottom portion of the output gear 56 .
- the output shaft 57 is fixed to the output gear 56 .
- a vertically extending slit 57 a is formed in the lower portion of the output shaft 57 . Rotation of the sun gear 53 is reduced by the fixed ring gear 52 , the plurality of planetary gears 54 , the carrier 55 and the output gear 56 and transmitted to the output shaft 57 .
- the guide member 60 has a cylindrical shape.
- the guide member 60 is arranged inside the upper portion of the holder 20 .
- a female thread is formed in the lower portion of the inner peripheral surface of the guide member 60 .
- An output shaft 57 is arranged inside the guide member 60 .
- the guide member 60 rotatably supports the output shaft 57 .
- the drive shaft 65 has a columnar portion 66 and a flat plate portion 67 .
- the flat plate portion 67 is connected to the upper end portion of the cylindrical portion 66 .
- the cylindrical portion 66 and the flat plate portion 67 are integrally formed.
- a male thread is formed on the outer peripheral surface of the cylindrical portion 66 .
- the male thread of the cylindrical portion 66 is screwed with the female thread of the guide member 60 .
- the flat plate portion 67 is arranged in the slit 57a of the output shaft 57 so as to be vertically movable.
- the drive shaft 65 is rotated by the output shaft 57 and moved vertically by a screw feeding action.
- the valve body 70 has a stem 71 , a valve portion 72 , a spring receiving portion 73 and a ball receiving portion 74 .
- the stem 71 has a cylindrical shape.
- the stem 71 is arranged inside the valve body support member 25 .
- the stem 71 is supported by the valve support member 25 so as to be vertically movable.
- the valve portion 72 is arranged at the lower end of the stem 71 .
- the valve portion 72 has an annular shape.
- the valve portion 72 protrudes radially outward from the outer peripheral surface of the stem 71 .
- the valve portion 72 vertically faces the valve port 14 .
- the spring receiving portion 73 has a cylindrical shape.
- the spring receiving portion 73 is joined to the upper end portion of the stem 71 .
- the spring receiving portion 73 has a flange portion 73a protruding radially outward.
- the ball receiving portion 74 has a circular flat plate portion and a convex portion connected to the lower surface of the flat plate portion.
- the ball receiving portion 74 has a flat plate portion in contact with the ball 68 and a convex portion fitted in a hole formed in the spring receiving portion 73 .
- a ball 68 is arranged between the ball receiving portion 74 and the drive shaft 65 .
- a valve opening spring 75 is arranged between the flange portion 73 a of the spring receiving portion 73 and the valve body support member 25 .
- the valve opening spring 75 is a compression coil spring. The valve opening spring 75 pushes the valve body 70 (flange portion 73a) upward.
- the valve body 70 changes the opening area of the valve port 14 steplessly (including substantially steplessly) by moving the valve portion 72 forward and backward with respect to the valve port 14 .
- the minimum area of the valve orifice 14 may be greater than 0 (ie, the valve orifice 14 is slightly open). Alternatively, the minimum area of the valve port 14 may be 0 (that is, the valve port 14 is fully closed).
- the stator unit 80 has a fitting hole 80b defined by its inner peripheral surface 80a.
- the can 30 is fitted into the fitting hole 80b.
- the can 30 is arranged inside the inner peripheral surface 80 a of the stator unit 80 .
- the stator unit 80 constitutes a stepping motor together with the magnet rotor 41 .
- the stator unit 80 includes an A-phase yoke 81A, an A-phase bobbin 82A, an A-phase coil 83A, a B-phase yoke 81B, a B-phase bobbin 82B, a B-phase coil 83B, a resin member 85, a cover 95, have.
- A-phase yoke 81A, A-phase bobbin 82A, A-phase coil 83A, B-phase yoke 81B, B-phase bobbin 82B, B-phase coil 83B, and resin member 85 are combined together as shown in FIG. An assembly 90 is obtained.
- the A-phase yoke 81A has a hollow annular shape with a rectangular cross section in the radial direction.
- the A-phase yoke 81A is made of metal.
- the A-phase yoke 81A has a first plate portion 81a, a second plate portion 81b, an outer plate portion 81c, a plurality of first pole teeth 81d, and a plurality of second pole teeth 81e.
- the first plate portion 81a has an annular shape.
- the second plate portion 81b has an annular shape and is arranged in parallel with the first plate portion 81a with a gap therebetween in the vertical direction.
- the inner diameter and outer diameter of the first plate portion 81a are the same as the inner diameter and outer diameter of the second plate portion 81b.
- the outer plate portion 81c has a cylindrical shape. One end of the outer plate portion 81c is connected to the outer peripheral edge of the first plate portion 81a.
- the outer plate portion 81c is arranged perpendicular to the first plate portion 81a. The other end of the outer plate portion 81c is in contact with the outer peripheral edge of the second plate portion 81b.
- the outer plate portion 81c connects the outer peripheral edge of the first plate portion 81a and the outer peripheral edge of the second plate portion 81b.
- the plurality of first pole teeth 81d are connected to the inner peripheral edge of the first plate portion 81a.
- the plurality of first pole teeth 81d are arranged perpendicular to the first plate portion 81a.
- the plurality of first pole teeth 81d have a tapered shape, and their tips are directed toward the second plate portion 81b.
- the plurality of first pole teeth 81d are arranged at regular intervals in the circumferential direction.
- the plurality of second pole teeth 81e are connected to the inner peripheral edge of the second plate portion 81b.
- the plurality of second pole teeth 81e are arranged perpendicular to the second plate portion 81b.
- the plurality of second pole teeth 81e have a tapered shape, and their tips are directed toward the first plate portion 81a.
- the plurality of second pole teeth 81e are arranged at regular intervals in the circumferential direction.
- the plurality of first pole teeth 81d and the plurality of second pole teeth 81e are alternately arranged at intervals in the circumferential direction.
- the plurality of first pole teeth 81 d and the plurality of second pole teeth 81 e form the inner peripheral surface 80 a of the stator unit 80 .
- "the same” includes substantially the same.
- a part having the first plate portion 81a, the outer plate portion 81c and the first pole tooth 81d and a part having the second plate portion 81b and the second pole tooth 81e are formed by press working, and these parts are combined.
- a phase yoke 81A is obtained by the above.
- the A-phase bobbin 82A has a cylindrical shape.
- the A-phase bobbin 82A is made of resin.
- the A-phase bobbin 82A has a first flange portion 82a, a second flange portion 82b, and a cylindrical portion 82c.
- the first flange portion 82a has an annular flat plate shape.
- the second flange portion 82b has an annular flat plate shape and is arranged in parallel with the first flange portion 82a with a gap therebetween in the vertical direction.
- the cylindrical portion 82c connects the inner peripheral edge of the first flange portion 82a and the inner peripheral edge of the second flange portion 82b.
- An A-phase coil 83A is wound around the A-phase bobbin 82A.
- the A-phase bobbin 82A and the A-phase coil 83A are enclosed by the internal space of the A-phase yoke 81A (the first plate portion 81a, the second plate portion 81b, the outer plate portion 81c, the first pole tooth 81d and the second pole tooth 81e). space).
- the first flange portion 82a is in contact with the first plate portion 81a of the A-phase yoke 81A.
- the second flange portion 82b is in contact with the second plate portion 81b of the A-phase yoke 81A.
- the cylindrical portion 82c is in contact with the plurality of first pole teeth 81d and the plurality of second pole teeth 81e of the A-phase yoke 81A.
- the A-phase bobbin 82A defines the internal space of the A-phase yoke 81A and the space between the plurality of first pole teeth 81d and the plurality of second pole teeth 81e of the A-phase yoke 81A.
- the B-phase yoke 81B, the B-phase bobbin 82B, and the B-phase coil 83B are the same as the A-phase yoke 81A, the A-phase bobbin 82A, and the A-phase coil 83A, except that they are arranged upside down.
- the A-phase yoke 81A and the B-phase yoke 81B are arranged coaxially.
- the second plate portion 81b of the A-phase yoke 81A and the second plate portion 81b of the B-phase yoke 81B are in contact with each other.
- the other end of the outer plate portion 81c of the A-phase yoke 81A and the other end of the outer plate portion 81c of the B-phase yoke 81B are in contact with each other.
- a plurality of terminals 84 are connected to the A-phase coil 83A and the B-phase coil 83B.
- the A-phase yoke 81A and the B-phase yoke 81B have a first opening 81f and a second opening 81g.
- the first opening 81f is arranged across the outer plate portion 81c of the A-phase yoke 81A and the outer plate portion 81c of the B-phase yoke 81B.
- the second opening 81g is also arranged across the outer plate portion 81c of the A-phase yoke 81A and the outer plate portion 81c of the B-phase yoke 81B.
- the center position of the second opening 81g is separated from the center position of the first opening 81f by 180 degrees in the circumferential direction of the A-phase yoke 81A. It is preferable that the center position of the second opening 81g be separated from the center position of the first opening 81f by 90 degrees or more in the circumferential direction of the A-phase yoke 81A.
- the resin member 85 is made of resin and integrally formed with the A-phase yoke 81A and the B-phase yoke 81B.
- the resin member 85 has an A-phase yoke filling portion 86A, a B-phase yoke filling portion 86B, a terminal support portion 87, an annular portion 88, and a seal portion 89. As shown in FIG.
- the A-phase yoke filling portion 86A is arranged in the internal space of the A-phase yoke 81A.
- A-phase yoke filling portion 86A fills the internal space of A-phase yoke 81A and covers A-phase bobbin 82A and A-phase coil 83A.
- B-phase yoke filling portion 86B is arranged in the internal space of B-phase yoke 81B.
- B-phase yoke filling portion 86B fills the internal space of B-phase yoke 81B and covers B-phase bobbin 82B and B-phase coil 83B.
- the terminal support portion 87 extends radially outward (to the right in FIG. 1) from the first opening 81f.
- the terminal support portion 87 connects the A-phase yoke filling portion 86A and the B-phase yoke filling portion 86B.
- a plurality of terminals 84 protrude from the tip of the terminal support portion 87 .
- the annular portion 88 has an annular shape.
- the annular portion 88 is arranged on the inner peripheral edge of the upper surface (one end surface of the A-phase yoke 81A) of the first plate portion 81a of the A-phase yoke 81A.
- the seal portion 89 has a substantially cylindrical shape.
- the seal portion 89 is arranged in a space between the plurality of pole teeth (the plurality of first pole teeth 81d and the plurality of second pole teeth 81e) of the A-phase yoke 81A and the B-phase yoke 81B.
- the space has a plurality of branched parts, which are connected together to form one space.
- a seal portion 89 fills the space.
- the seal portion 89 is seamlessly connected to the plurality of first pole teeth 81d and the plurality of second pole teeth 81e.
- the seal portion 89 forms the inner peripheral surface 80a of the stator unit 80 together with the plurality of first pole teeth 81d and the plurality of second pole teeth 81e.
- a plurality of resin portion connection points 88 a arranged in the circumferential direction of the annular portion 88 are connected to the seal portion 89 .
- the inside diameter of the sealing portion 89 is the same as the inside diameter of the annular portion 88 .
- the number of the plurality of resin portion connection points 88a is the sum of the number of the plurality of first pole teeth 81d and the number of the plurality of second pole teeth 81e of the A-phase yoke 81A.
- the resin member 85 has a first resin portion 85-1 and a second resin portion 85-2.
- the first resin portion 85-1 includes an A-phase yoke filling portion 86A, a B-phase yoke filling portion 86B, and a terminal support portion 87.
- the second resin portion 85-2 includes an annular portion 88 and a seal portion 89. As shown in FIG. In this embodiment, the second resin portion 85-2 is separate from the first resin portion 85-1.
- the first resin portion 85-1 and the second resin portion 85-2 may be connected at locations outside the A-phase yoke 81A and the B-phase yoke 81B, for example.
- the A-phase bobbin 82A defines an A-phase yoke filling portion 86A and a seal portion 89. As shown in FIG.
- the B-phase bobbin 82B separates a B-phase yoke filling portion 86B and a seal portion 89 from each other.
- the first resin portion 85-1 is molded by applying a relatively low pressure to the resin in order to prevent disconnection of the coil.
- the second resin portion 85-2 is applied with a relatively high pressure (at least the resin of the first resin portion 85-1) in order to properly fill the spaces between the plurality of first pole teeth 81d and the plurality of second pole teeth 81e. It is molded by applying a pressure higher than the pressure applied to the resin to the resin.
- the resin of the first resin portion 85-1 (resin constituting the first resin portion 85-1, hereinafter also referred to as “first resin”) and the resin of the second resin portion 85-2 ( The resin constituting the second resin portion 85-2, hereinafter also referred to as “second resin”), is of the same type, for example, polyphenylene sulfide (PPS).
- first resin and the second resin may be of different types.
- the first resin is, for example, polybutylene terephthalate (PBT)
- the second resin is, for example, polyphenylene ether (PPE). It is preferable that the first resin can be molded at a pressure lower than that of the second resin.
- the second resin preferably has higher fluidity than the first resin.
- the resin may be syndiotactic polystyrene (SPS) or polyamide (PA).
- SPS syndiotactic polystyrene
- PA polyamide
- fluidity refers to the property of flowing, and is indicated by indices such as melt mass flow rate (MFR) and melt volume flow rate (MVR). The higher the fluidity of the resin, the easier it is to flow.
- the cover 95 is made of resin.
- the cover 95 has a cylindrical shape with a closed upper end and an open lower end.
- a cover 95 houses the assembly 90 .
- a cover 95 is integrally formed with the assembly 90 .
- the cover 95 has a peripheral wall portion 96 , an upper wall portion 97 , a connector portion 98 and a cylindrical portion 99 .
- A-phase yoke 81A, B-phase yoke 81B, and annular portion 88 of resin member 85 are embedded in the inner peripheral surface of peripheral wall portion 96 .
- the upper wall portion 97 is connected to the upper end of the peripheral wall portion 96 .
- the upper wall portion 97 has a dome shape.
- the upper end portion of the can 30 is arranged inside the upper wall portion 97 .
- the connector portion 98 has a tubular shape extending radially outward (to the right in FIG. 1) from the peripheral wall portion 96 .
- a plurality of terminals 84 are arranged inside the connector portion 98 .
- the cylindrical portion 99 extends downward from the lower end portion of the peripheral wall portion 96 .
- a lower end portion of the cylindrical portion 99 is in contact with the upper surface 10 c of the valve body 10 .
- the cover 95 may be omitted and only the assembly 90 may be used as the stator unit.
- valve port 14 the holder 20, the valve body support member 25, the can 30, the magnet rotor 41, the connecting member 42, the rotor shaft 43, the output shaft 57, the guide member 60, the drive shaft 65, the valve body 70, A
- the central axes of the phase yoke 81A, the B-phase yoke 81B, the annular portion 88, and the seal portion 89 are aligned.
- FIG. 1 a method of manufacturing the stator unit 80 of the motor-operated valve 1 will be described with reference to FIGS. 4 to 7.
- FIG. 1 a method of manufacturing the stator unit 80 of the motor-operated valve 1 will be described with reference to FIGS. 4 to 7.
- a phase yoke 81A and B phase yoke 81B are formed by press working.
- An A-phase bobbin 82A around which an A-phase coil 83A is wound is arranged in the internal space of the A-phase yoke 81A.
- a B-phase bobbin 82B around which a B-phase coil 83B is wound is arranged in the internal space of the B-phase yoke 81B.
- the second plate portion 81b of the A-phase yoke 81A and the second plate portion 81b of the B-phase yoke 81B are brought into contact with each other, and the A-phase yoke 81A and the B-phase yoke 81B are arranged coaxially.
- a plurality of terminals 84 are connected to the A-phase coil 83A and the B-phase coil 83B (FIG. 4).
- the mold 200 is a mold for molding the resin member 85 .
- the cavity 285 has a shape corresponding to the external shapes of the A-phase yoke 81A, the B-phase yoke 81B, the terminal support portion 87, the annular portion 88 and the seal portion 89 (inner peripheral surface 80a). Cavity 285 has a first cavity portion 288 , a second cavity portion 289 and a third cavity portion 287 .
- the first cavity portion 288 corresponds to the annular portion 88 of the resin member 85.
- the second cavity portion 289 corresponds to the seal portion 89 of the resin member 85 and corresponds to the space between the pole teeth of the A-phase yoke 81A and the B-phase yoke 81B.
- the first cavity portion 288 has a plurality of cavity portion connection points 288 a corresponding to the plurality of resin portion connection points 88 a of the annular portion 88 .
- a plurality of cavity portion connection points 288 a are connected to the second cavity portion 289 .
- the third cavity portion 287 corresponds to the terminal support portion 87 of the resin member 85 .
- the resin passage 210 is connected to the ring-shaped first cavity portion 288 via a plurality of gates G1 to G3.
- a plurality of gates G1 to G3 are arranged at intervals in the circumferential direction.
- a resin passage 211 is connected to the third cavity portion 287 via a gate G4.
- the cavity 285 is filled with resin. Specifically, the resin is injected into the third cavity portion 287 from the resin passage 211 through the gate G4. The resin flows from the third cavity portion 287 through the first opening 81f into the internal space of the A-phase yoke 81A and the internal space of the B-phase yoke 81B. After resin is injected into the third cavity portion 287, the internal space of the A-phase yoke 81A, and the internal space of the B-phase yoke 81B, the pressure is kept at the pressure P1. That is, the pressure P1 is applied to the resin injected into the third cavity portion 287, the internal space of the A-phase yoke 81A and the internal space of the B-phase yoke 81B.
- the resin is injected into the first cavity portion 288 from the resin passage 210 through the plurality of gates G1 to G3. Resin flows circumferentially within the first cavity portion 288 . Then, the resin flows from the first cavity portion 288 to the second cavity portion 289 through the plurality of cavity portion connecting points 288a. Resin flows into the second cavity portion 289 from a plurality of locations, and in the second cavity portion 289, as shown in FIG. 6, the resin flows in the axial direction (downward). As a result, the resin spreads rapidly in the second cavity portion, and variations in the amount of resin flowing into the second cavity portion can be suppressed.
- FIG. 7 shows the resin flow in the comparative example.
- the cavity 285 of the mold 200 does not have a first cavity portion 288 corresponding to the annular portion 88 and one gate is connected to the second cavity portion 289 .
- the resin flows into the second cavity portion 289 from one point, and in the second cavity portion 289, the resin flows in the circumferential direction (horizontal direction) and axial direction (vertical direction). Therefore, the distance that the resin flows from one gate in the second cavity portion 289 is relatively long, and the amount of resin flowing into the second cavity portion 289 may vary due to the influence of viscosity changes during resin flow. .
- pressure P2 is applied to the resin injected into the first cavity portion 288 and the second cavity portion 289 .
- Pressure P2 is higher than pressure P1.
- resin is injected from the resin passage 211 into the third cavity portion 287 (the step of molding the first resin portion 85-1), and resin is injected from the resin passage 210 into the first cavity portion 288 (the second step).
- the molding process of the resin portion 85-2) is performed in separate processes, so that the pressure P2 is higher than the pressure P1 by changing the molding conditions for each process.
- the resin passage 211 may be connected to the resin passage 210, the pressure loss of the resin passage 211 may be made larger than the pressure loss of the resin passage 210, and the pressure P2 may be higher than the pressure P1.
- the first cavity portion 288, the second cavity portion 289, the third cavity portion 287, the internal space of the A-phase yoke 81A and the internal space of the B-phase yoke 81B are filled with the resin.
- the first resin portion 85-1 the A-phase yoke filling portion 86A, the B-phase yoke filling portion 86B, the terminal support portion 87
- the second resin portion 85-2 annular portion 88, the sealing portion 89).
- the A-phase yoke 81A, the A-phase bobbin 82A, the A-phase coil 83A, the B-phase yoke 81B, the B-phase bobbin 82B, the B-phase coil 83B, and the resin member 85 are integrated and assembled. It becomes solid 90. The assembly 90 is removed from the mold 200.
- the assembly 90 is installed in the cavity of another mold (not shown) for forming the cover 95. Then, the cavity is filled with resin to form the cover 95 . When the resin hardens, the assembly 90 and the cover 95 are integrated to form the stator unit 80 . The stator unit 80 is removed from another mold. Thus, the stator unit 80 is completed.
- the motor-operated valve 1 described above includes a stator unit 80, a cylindrical can 30 arranged inside the stator unit 80, a magnet rotor 41 arranged inside the can 30, and a valve element driven by the magnet rotor 41. 70 and .
- the stator unit 80 includes a hollow ring-shaped A-phase yoke 81A and a B-phase yoke 81B, a cylindrical A-phase bobbin 82A arranged in the internal space of the A-phase yoke 81A and around which an A-phase coil 83A is wound, A cylindrical B-phase bobbin 82B arranged in the internal space of the B-phase yoke 81B and around which a B-phase coil 83B is wound, and a resin member 85 (first resin member) integrally formed with the A-phase yoke 81A and the B-phase yoke 81B. a portion 85-1 and a second resin portion 85-2).
- A-phase yoke 81A and B-phase yoke 81B have first pole teeth 81d and second pole teeth 81e.
- the first pole teeth 81d and the second pole teeth 81e are arranged circumferentially on the inner circumference of the A-phase yoke 81A and circumferentially on the inner circumference of the B-phase yoke 81B.
- the first resin portion 85-1 includes an A-phase yoke filling portion 86A arranged in the internal space of the A-phase yoke 81A and a B-phase yoke filling portion 86B arranged in the internal space of the B-phase yoke 81B.
- a second resin portion 85-2 includes a seal portion 89 disposed in the space between the plurality of first pole teeth 81d and second pole teeth 81e.
- the A-phase bobbin 82A separates the A-phase yoke filling portion 86A and the sealing portion 89
- the B-phase bobbin 82B separates the B-phase yoke filling portion 86B and the sealing portion 89 from each other.
- the A-phase bobbin 82A is positioned between the inner space of the A-phase yoke 81A corresponding to the A-phase yoke filling portion 86A and the sealing portion 89. and a space (second cavity portion 289) between the plurality of first pole teeth 81d and second pole teeth 81e corresponding to the B-phase bobbin 82B corresponding to the B-phase yoke filling portion 86B.
- the inner space of the yoke 81B and the space (second cavity portion 289) between the plurality of first pole teeth 81d and second pole teeth 81e corresponding to the sealing portion 89 are defined.
- the first resin portion 85-1 and the second resin portion 85-2 can be molded separately, and the molding conditions for the first resin portion 85-1 and the molding conditions for the second resin portion 85-2 are can be set separately. Therefore, by molding the second resin portion 85-2 with resin to which a higher pressure than the pressure applied to the resin of the first resin portion 85-1 is applied, the gap between the plurality of first pole teeth 81d and the second pole teeth 81e is reduced. This space can be appropriately filled with resin, and application of high pressure to the A-phase coil 83A and the B-phase coil 83B can be avoided.
- the stator unit 80 can prevent moisture from entering the internal space of the A-phase yoke 81A and the internal space of the B-phase yoke 81B, and can prevent disconnection of the A-phase coil 83A and the B-phase coil 83B.
- the resin of the first resin portion 85-1 can be molded with a lower pressure than the resin of the second resin portion 85-2, the pressure applied to the resin when molding the first resin portion 85-1 is can be lower. Therefore, disconnection of the A-phase coil 83A and the B-phase coil 83B can be effectively suppressed.
- the resin of the second resin portion 85-2 has higher fluidity than the resin of the first resin portion 85-1, the spaces between the plurality of first pole teeth 81d and the second pole teeth 81e It can be properly filled with resin. Therefore, it is possible to effectively suppress entry of moisture into the internal space of the A-phase yoke 81A and the internal space of the B-phase yoke 81B.
- the second resin portion 85-2 has an annular portion 88 arranged on the inner peripheral edge of one end face of the A-phase yoke 81A.
- a plurality of resin portion connection points 88 a arranged in the circumferential direction of the annular portion 88 are connected to the seal portion 89 .
- a cavity 285 of the mold 200 used for molding the resin member 85 has a first cavity portion 288 corresponding to the annular portion 88 and a second cavity portion 289 corresponding to the seal portion 89 .
- the first cavity portion 288 has a plurality of cavity portion connection points 288a arranged in the circumferential direction corresponding to the plurality of resin portion connection points 88a, and the plurality of cavity portion connection points 288a are connected to the second cavity portion 289.
- the resin injected into the first cavity portion 288 flows in the first cavity portion 288 in the circumferential direction. Then, the resin flows from the first cavity portion 288 into the second cavity portion 289 via the plurality of cavity portion connection points 288a. Therefore, the resin flows evenly in the circumferential direction into the second cavity portion 289 (ie, the space between the pole teeth) and flows axially in the second cavity portion 289 (FIG. 6). As a result, the resin quickly spreads into the second cavity portion 289, and the amount of resin flowing into the second cavity portion 289 is reduced compared to the case where the resin flows axially and circumferentially in the second cavity portion 289 (FIG. 7). variation can be suppressed.
- the space between the plurality of first pole teeth 81d and the plurality of second pole teeth 81e can be appropriately filled with resin, and the internal space of the A-phase yoke 81A and the internal space of the B-phase yoke 81B can be filled with moisture. can effectively suppress the intrusion of
- the A-phase yoke 81A includes a first annular plate portion 81a, a second annular plate portion 81b arranged parallel to and spaced from the first plate portion 81a, and the first plate portion 81a.
- a plurality of first pole teeth 81d connected perpendicularly to the first plate portion 81a to the inner peripheral edge of the second plate portion 81b and directed toward the second plate portion 81b; and a plurality of second pole teeth 81e connected perpendicularly to 81b and directed toward the first plate portion 81a.
- a plurality of first pole teeth 81d and a plurality of second pole teeth 81e are alternately arranged in the circumferential direction of the A-phase yoke 81A.
- the B-phase yoke 81B has the same configuration as the A-phase yoke 81A.
- An annular portion 88 is arranged on the inner peripheral edge of the first plate portion 81a of the A-phase yoke 81A.
- the stator unit 80 has a resin cover 95 .
- a cover 95 is integrally formed with an assembly 90 having an A-phase yoke 81A, a B-phase yoke 81B, a first resin portion 85-1, and a second resin portion 85-2.
- a cover 95 houses the assembly 90 .
- the A-phase yoke 81A, the B-phase yoke 81B, the first resin portion 85-1, and the second resin portion 85-2 can be protected from impact and the like.
- the sealing portion 89 is arranged in the space between the plurality of first pole teeth 81d and the plurality of second pole teeth 81e, the resin is restricted from flowing into the space when the cover 95 is molded. be. Therefore, burrs and filling defects in the cover 95 can be suppressed compared to a configuration in which the resin for molding the cover 95 flows into the space.
- the motor-operated valve 1 described above decelerates the rotation of the magnet rotor 41 and transmits it to the drive shaft 65 .
- the motor-operated valve 1 may be a direct-acting motor-operated valve that directly transmits the rotation of the magnet rotor 41 to the drive shaft 65 .
- each term indicating a shape such as “cylinder” or “cylinder” is also used for a member or a portion of a member that substantially has the shape of the term.
- a “cylindrical member” includes a cylindrical member and a substantially cylindrical member.
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Abstract
Description
Claims (8)
- 中空環状体形状のヨークと、前記ヨークの内部空間に配置され、コイルが巻回された円筒形状のボビンと、第1樹脂部と、第2樹脂部と、を有するステーターユニットであって、
前記ヨークが、複数の極歯を有し、前記複数の極歯が前記ヨークの内周において周方向に並べられ、
前記第1樹脂部が、前記ヨークの内部空間に充填された充填部分を含み、
前記第2樹脂部が、前記複数の極歯の間の空間に充填されたシール部分を含み、
前記ボビンが、前記充填部分と前記シール部分とを区画していることを特徴とするステーターユニット。 - 前記第1樹脂部の樹脂が、前記第2樹脂部の樹脂より低い圧力で成形が可能なものである、請求項1に記載のステーターユニット。
- 前記第2樹脂部の樹脂が、前記第1樹脂部の樹脂より流動性が高いものである、請求項1または請求項2に記載のステーターユニット。
- 前記第2樹脂部が、前記ヨークの一端面の内周縁に配置された円環形状の環状部分をさらに有し、
前記環状部分における周方向に並ぶ複数の樹脂部分接続箇所が、前記シール部分と接続されている、請求項1~請求項3のいずれか一項に記載のステーターユニット。 - 前記ヨークが、
円環形状の第1板部と、
前記第1板部と間隔をあけて平行に配置された円環形状の第2板部と、
前記第1板部の内周縁に当該第1板部に対して直角に接続されかつ前記第2板部に先端が向けられた複数の第1極歯と、
前記第2板部の内周縁に当該第2板部に対して直角に接続されかつ前記第1板部に先端が向けられた複数の第2極歯と、を有し、
前記第1極歯と前記第2極歯とが、前記ヨークの周方向に交互に配置され、
前記環状部分が、前記第1板部の内周縁に配置されている、請求項4に記載のステーターユニット。 - 前記ステーターユニットが、樹脂製のカバーをさらに有し、
前記カバーが、前記ヨークと前記第1樹脂部と前記第2樹脂部とを有する組立体と一体成形され、前記組立体を収容する、請求項1~請求項5のいずれか一項に記載のステーターユニット。 - 請求項1~請求項6のいずれか一項に記載のステーターユニットと、
前記ステーターユニットの内側に配置された円筒形状のキャンと、
前記キャンの内側に配置されたマグネットローターと、
前記マグネットローターによって駆動される弁体と、を有することを特徴とする電動弁。 - 中空環状体形状のヨークと、前記ヨークの内部空間に配置され、コイルが巻回された円筒形状のボビンと、第1樹脂部と、第2樹脂部と、を有するステーターユニットの製造方法であって、
前記ヨークが、複数の極歯を有し、前記複数の極歯が前記ヨークの内周において周方向に並べられ、
前記第1樹脂部が、前記ヨークの内部空間に充填された充填部分を含み、
前記第2樹脂部が、前記複数の極歯の間の空間に充填されたシール部分を含み、
前記ボビンが、前記充填部分と前記シール部分とを区画しており、
前記第1樹脂部の樹脂に加える圧力より高い圧力を加えた樹脂で前記第2樹脂部を成形することを特徴とするステーターユニットの製造方法。
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KR1020237036187A KR20230159572A (ko) | 2021-06-14 | 2022-03-25 | 스테이터 유닛 및 전동 밸브 및 스테이터 유닛의 제조 방법 |
CN202280030349.2A CN117378133A (zh) | 2021-06-14 | 2022-03-25 | 定子单元、电动阀以及定子单元的制造方法 |
EP22824611.2A EP4357654A1 (en) | 2021-06-14 | 2022-03-25 | Stator unit, electric valve, and manufacturing method for stator unit |
JP2023529598A JP7466971B2 (ja) | 2021-06-14 | 2022-03-25 | ステーターユニットおよび電動弁、ならびに、ステーターユニットの製造方法 |
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JPH07222424A (ja) * | 1994-02-02 | 1995-08-18 | Sankyo Seiki Mfg Co Ltd | ステッピングモータ |
JP2015056587A (ja) * | 2013-09-13 | 2015-03-23 | 株式会社不二工機 | ステータユニット |
JP2015204433A (ja) | 2014-04-16 | 2015-11-16 | 株式会社不二工機 | 電磁的駆動コイル装置及びその成形方法 |
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US11747577B2 (en) | 2019-05-22 | 2023-09-05 | Nippon Telegraph And Telephone Corporation | Waveguide connection structure, waveguide chip, connector, and method of manufacturing waveguide connection component, and waveguide connecting method |
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- 2022-03-25 CN CN202280030349.2A patent/CN117378133A/zh active Pending
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH07222424A (ja) * | 1994-02-02 | 1995-08-18 | Sankyo Seiki Mfg Co Ltd | ステッピングモータ |
JP2015056587A (ja) * | 2013-09-13 | 2015-03-23 | 株式会社不二工機 | ステータユニット |
JP2015204433A (ja) | 2014-04-16 | 2015-11-16 | 株式会社不二工機 | 電磁的駆動コイル装置及びその成形方法 |
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