WO2011135930A1 - Moteur sans noyau cylindrique - Google Patents

Moteur sans noyau cylindrique Download PDF

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Publication number
WO2011135930A1
WO2011135930A1 PCT/JP2011/055401 JP2011055401W WO2011135930A1 WO 2011135930 A1 WO2011135930 A1 WO 2011135930A1 JP 2011055401 W JP2011055401 W JP 2011055401W WO 2011135930 A1 WO2011135930 A1 WO 2011135930A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylindrical
coreless motor
shaft
magnet
casing
Prior art date
Application number
PCT/JP2011/055401
Other languages
English (en)
Japanese (ja)
Inventor
駒井悠二
Original Assignee
並木精密宝石株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 並木精密宝石株式会社 filed Critical 並木精密宝石株式会社
Priority to CN201180007891.8A priority Critical patent/CN102742130B/zh
Priority to JP2012512711A priority patent/JP5728744B2/ja
Publication of WO2011135930A1 publication Critical patent/WO2011135930A1/fr

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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
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
    • H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/26—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the armature windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/56—Motors or generators having iron cores separated from armature winding
    • 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
    • H02K3/47—Air-gap windings, i.e. iron-free windings

Definitions

  • an end of a shaft opposite to an output end of a shaft provided in the center of a cylindrical casing is connected to a commutator, and a cylindrical coil member concentric with the casing is provided on the commutator to provide a motor rotor unit.
  • the present invention relates to a cylindrical coreless motor having a stator unit in which a cylindrical magnet is arranged by providing an air gap between the shaft and the coil member.
  • FIG. 8 shows a schematic configuration of a conventional example of this cylindrical coreless motor.
  • a conventional cylindrical coreless motor includes a casing 1 (motor case) made of a magnetic material, a shaft 2 arranged along the rotation center axis of the casing 1, and a bearing for rotatably supporting the shaft 2. 3, 4, a collar 5 for maintaining the distance between the bearing 3 and the bearing 4, a shaft 2, a bearing house 6 that also serves as a yoke that houses the bearings 3, 4 and the collar 5, and a magnet provided on the outer periphery of the bearing house 6 7, a cylindrical coil 8 disposed in an air gap between the magnet 7 and the casing 1, a commutator (commutator unit) 9 for supplying power to the coil 8, one of the commutator 9 and the shaft 2
  • the shaft connecting part 10 for connecting the end part and the mold member 11 provided with the brush of the commutator 9 and the like are closed. Have.
  • the casing 1, the bearing house 6, and the magnet 7 constitute a stator unit of the cylindrical coreless motor, and the coil 8, the shaft 2, the shaft coupling portion 10, and the commutator 9 constitute a rotor unit of the cylindrical coreless motor. To do.
  • Patent Document 1 a metal (bearing) holder is formed in two stages of a large diameter and a small diameter, a bearing is inserted into the large diameter portion from the outside, and a cylindrical magnet is disposed in the small diameter portion.
  • a cylinder magnet having a large wall thickness and an increased volume is disclosed.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a cylindrical coreless motor that can be easily reduced in size and can suppress the size of a magnet for obtaining a required output torque. .
  • the end of the shaft opposite to the output end of the shaft provided in the center of the cylindrical casing is connected to a commutator, and a cylindrical coil member is provided on the casing to form the rotor unit of the motor.
  • the stator unit fixes the magnet to the casing and allows the shaft to rotate to the casing. It has a resin mold member to be supported.
  • a wall portion is provided on the output end side of the casing in a direction perpendicular to the axis, and the wall portion is further provided with a recess and at least one or more from the output end side toward the opposite side.
  • the resin mold member may be molded so as to fill the concave portion leaving at least a portion through which the shaft passes.
  • the resin mold member may be molded in such a manner that the surface of the magnet facing the commutator is locked.
  • the resin mold member may further include a yoke member through which the shaft passes around the shaft.
  • a non-rotating groove is provided on a surface of the magnet facing the commutator, and the resin mold member is molded so as to fill the groove.
  • the resin mold member filling the concave portion forms a cylindrical convex portion on the output end side, and a screw portion is formed on at least one of the inner peripheral portion and the outer peripheral portion thereof. It is good to mold to the embodiment.
  • cylindrical magnet may be molded so as to escape the space of the connecting portion that connects the shaft to the commutator.
  • the cylindrical coreless motor of the present invention as described above, it is possible to easily reduce the size and to suppress the size of the magnet for obtaining a required output torque. Moreover, in the cylindrical coreless motor of the same size, since the volume of the magnet that can be arranged can be increased, an effect that the output torque can be increased is obtained. Moreover, the effect that the number of parts and a manufacturing man-hour can be reduced by molding the resin bearing which supports a rotating shaft by an integral resin mold member. Further, in addition to the function as a resin bearing, the effect of preventing the magnet from coming off and preventing it from rotating, and the function as the connecting portion of the gear head can be molded by an integral resin mold member. Moreover, the effect that it can apply to the cylindrical coreless motor by the casing of various magnitude
  • the figure which shows the outline of a structure of the cylindrical coreless motor concerning the Example of this invention Sectional drawing and the side view which showed the shape of the magnet used for the cylindrical coreless motor concerning the Example of this invention.
  • the figure which shows the outline of a structure of the cylindrical coreless motor concerning the Example of this invention The figure which shows the state of the casing before and behind the resin mold concerning the Example of this invention.
  • the figure which shows the outline of a structure of the cylindrical coreless motor concerning the Example of this invention The figure which shows the outline of a structure of the cylindrical coreless motor concerning the Example of this invention.
  • the schematic sectional drawing which shows the outline of a structure of the conventional cylindrical coreless motor.
  • FIG. 1A is a schematic sectional view showing an outline of the configuration of a cylindrical coreless motor according to an embodiment of the present invention.
  • the cylindrical coreless motor shown in FIG. 1A has the same outer diameter as the casing shown in FIG. 8, and the shaft 2, the coil 8, the commutator 9, and the shaft connecting portion 10 are also shown in FIG.
  • the configuration is the same as the conventional apparatus shown.
  • FIG. 1 (a) the illustration of the mold member 11 in which the opening of the casing 1 is closed and the brush of the commutator 9 is provided in the conventional apparatus is omitted.
  • FIG. 1B is a view of the cylindrical coreless motor of FIG. 1A viewed from the opening side of the casing 1 (the side opposite to the output side of the shaft 2).
  • shaft 2, the axial connection part 10, and the commutator 9 are abbreviate
  • a casing 20 made of a magnetic material is provided with a shaft 2, a shaft connecting portion 10, and a commutator 9 that constitute a rotor unit of the cylindrical coreless motor. 2 is rotatably supported through a shaft hole formed in the center of a resin mold member 23 for integrally fixing the cylindrical magnet 21 to the casing 20.
  • a yoke member 24 formed of a sleeve-like magnetic material with an edge is provided so that the shaft 2 penetrates around the shaft hole of the resin mold member 23.
  • the yoke member is not necessarily required.
  • the provision of the yoke member improves the efficiency of the magnetic circuit and increases the output as a motor.
  • the casing 20, the magnet 21, the resin mold member 23, and the yoke member 24 constitute a stator unit of this cylindrical coreless motor.
  • the magnet 21 has a through hole 21a having a diameter slightly larger than the shaft hole (not shown) of the resin mold member 23 coaxially with the cylindrical rotation shaft. And forming one end portion into a stepped portion 21b larger than the diameter of the through hole 21a. Further, the end portion where the stepped portion 21b is formed is connected to the stepped portion 21b and is a non-rotating groove 21c in two directions. Is provided. In addition, although this groove
  • the resin mold member 23 fills the gap from the through hole 21a to the shaft hole of the magnet 21, the corner portion of the stepped portion 21b (the portion indicated by reference numeral 23c in the drawing), and the groove 21c. Formed into an embodiment.
  • the corner portion 23 c of the stepped portion 21 b locks the magnet 21, thereby preventing the magnet 21 from falling off in the axial direction of the shaft 2 and closing the groove 21 c with the resin mold member 23.
  • the resin mold member 23 is formed with bearing portions 23 a and 23 b that receive the shaft 2 near the end portion of the shaft hole, and in the gap between the bearing portion 23 a and the bearing portion 23 b and the shaft 2. Can smoothly rotate the shaft 2 by filling the lubricating oil or the like.
  • each bearing part 23a, 23b can also be formed as a plurality of annular protrusions in addition to being formed as a single annular protrusion.
  • the yoke 24 has a function of forming a magnetic circuit.
  • the resin injection that is applied to the magnet 21 when the resin is injected into a molding die (not shown). It also has a function of reducing the pressure and preventing the magnet 21 from being damaged by the resin injection pressure.
  • the bearing portions 23a and 23b that receive the shaft 2 are formed in the shaft holes provided in the resin mold member 23. Since it is not necessary to provide the necessary bearings 3 and 4, the collar 5, and the bearing house 6, the diameter of the through hole 21 a provided in the cylindrical magnet 21 can be reduced.
  • the magnet 21 of this embodiment can reduce the diameter of the through hole 21a.
  • the magnet 21 is substantially larger in the radial direction than the magnet 7 of the conventional device, and when the axial dimension is the same, the volume of the magnet 21 is larger than the volume of the magnet 7 of the conventional device. . Therefore, even if the outer dimensions of the magnet 21 are the same, the output of the motor can be increased.
  • the volume of the magnet 21 is the same as the volume of the magnet 7 of the conventional device in order to obtain an output torque equivalent to that of the cylindrical coreless motor of the conventional device shown in FIG. In this case, even if the magnet 21 is downsized in the axial direction in the casing 20, the same volume as the magnet 7 of the conventional device can be secured.
  • the stepped portion 21b is provided so as to allow the shaft coupling portion 10 to escape, so the shape of the magnet 21 is changed to the portion indicated by reference numeral 21d in FIG.
  • the volume of the magnet 21 can be further increased by the volume.
  • the axial dimension of the casing 20 can be further reduced. That is, in this embodiment, the cylindrical coreless motor can be reduced in size.
  • FIG. 4 is a diagram schematically illustrating the configuration of a cylindrical coreless motor according to another embodiment of the present invention.
  • FIG. 4A shows a configuration of a cylindrical coreless motor by a schematic cross section
  • FIG. 4B shows a state of a side surface seen from the opposite side of the output side of the cylindrical coreless motor.
  • FIG. 4A and 4B the illustration of the mold member provided with a commutator, a brush, and the like is omitted. Further, FIG. 4B shows the state of the resin mold member 23 and the magnet 31. Therefore, illustration of the rotor unit is also omitted.
  • the magnet 31 that is larger by the axial dimension is disposed without the magnet 21 that is miniaturized in the axial direction.
  • the volume of the magnet 31 in this embodiment is larger than that of the magnet 7 of the conventional apparatus.
  • This configuration can increase the output torque of this cylindrical coreless motor. Compared with the conventional apparatus configuration shown in FIG. 8, the output torque of the cylindrical coreless motor can be increased because the volume of the magnet is large.
  • the inventor of the present application manufactured the cylindrical coreless motor of this example and the cylindrical coreless motor of the conventional device under the conditions that the casing 20 had an outer diameter of ⁇ 17 mm, an outer diameter of the magnet 31 of ⁇ 12 mm, and a total length of 11 mm, and compared the torque characteristics.
  • a hard PPS resin is used for the resin mold member 23 forming the resin bearing portion, and an annular shape having a height of tens of ⁇ m is provided at the portion supporting the rotating shaft. Are formed on the output shaft side and on the opposite side.
  • the configuration according to the present embodiment can obtain an output torque that is 19% higher than the configuration according to the conventional apparatus.
  • the size of the cylindrical coreless motor is 17 mm in outer diameter.
  • the present invention is applicable to cylindrical coreless motors of any size. Among them, application to a cylindrical coreless motor having an outer diameter of about 4 to 20 mm is particularly suitable in consideration of resin molds and compatibility between the motor output and the resin bearing.
  • a hard PPS resin is used for the resin mold member, but there is no particular limitation on the material.
  • a material having slip characteristics and suitable for resin molding by injection molding can be appropriately selected.
  • FIG. 5 shows an embodiment in which a concave portion of the same size is provided on the side wall of the output shaft end, and the concave portion is filled with a resin mold member for casings of different outer diameter sizes as one embodiment of the present invention. Is shown.
  • FIGS. 5A and 5B show a casing 30 having an outer diameter of ⁇ 12 mm before resin molding in this embodiment.
  • Fig.5 (a) is the figure which looked at the casing 30 from the output-shaft side
  • FIG.5 (b) is the sectional side view.
  • the casing 30 has a wall 30a, and the wall 30a is provided with a recess 30b. And the recessed part 30b has the holes 30c and 30d.
  • FIG. 5 (c) and 5 (d) are views showing a casing part assembly after resin molding using the casing 30 in the present embodiment.
  • FIG.5 (c) is the figure seen from the output-shaft side
  • FIG.5 (d) is the side view.
  • the resin mold member 23 is molded so as to fill the recess 30b, leaving a portion that becomes the shaft hole of the output shaft in the hole 30c.
  • the hole 30d is also filled with the resin mold member, but this state also functions as a rotation stop for the casing 30 of the resin mold member 23.
  • FIGS. 5 (e) and 5 (f) are views showing a casing part assembly after resin molding using a casing 40 having an outer diameter of ⁇ 17 mm in the present embodiment.
  • FIG.5 (e) is the figure seen from the output-shaft side
  • FIG.5 (f) is the side view.
  • the casing 40 has a wall portion similar to the casing 30.
  • the wall portion is provided with a recess, and the resin mold member fills the recess leaving the shaft hole portion of the output shaft in the recess. It is molded as follows.
  • each recess provided in the casings 30 and 40 is the same shape with an inner diameter of ⁇ 10 mm and a depth of about 0.5 mm.
  • the resin mold members 23 filling the recesses form resin bearings in the casing 30 or the casing 40, respectively.
  • the resin mold member is injected from the concave side in the mold when resin molding is performed. At this time, since the concave portions of the casings 30 and 40 have the same shape, the same mold can be used on the fixed side of the mold.
  • the present invention can be applied to a cylindrical coreless motor having casings of various sizes without greatly modifying the mold for resin molding.
  • FIG. 6 shows an embodiment in which the resin mold member filling the concave portion of the output shaft end side wall portion forms a substantially cylindrical convex portion 23a toward the output end side as one embodiment of the present invention.
  • the pinion gear 12 is fixedly disposed on the shaft 2.
  • a screw portion 23b is formed on the outer peripheral portion of the substantially cylindrical convex portion 23a, and a gear head can be combined therewith.
  • FIG. 7 is a schematic sectional view showing an outline of the configuration of a cylindrical coreless motor according to another embodiment of the present invention.
  • the resin mold member completely covers the outer peripheral portion 41a of the magnet 41.
  • the outer diameter of the magnet 41 is smaller than the outer diameter of the magnet 21 in the form of the first embodiment. However, the magnet 41 has a volume equal to or greater than that of the magnet 21 of the first embodiment.
  • the magnet 41 need not be subjected to a surface treatment such as plating.
  • the present invention can be similarly applied to a cylinder coreless motor that is used for various purposes.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc Machiner (AREA)
  • Motor Or Generator Frames (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

La présente invention concerne un moteur sans noyau cylindrique, dont la dimension peut être facilement réduite, et pouvant supprimer la dimension d'un aimant pour obtenir un couple de sortie nécessaire d'un moteur. Une enveloppe (20) contient un arbre (2), une unité de raccordement d'arbre (10), et un commutateur (9), qui constituent une unité de rotor du moteur sans noyau cylindrique. L'arbre (2) est formé en pénétrant un trou d'arbre formé dans le centre d'un élément moulé en résine (23) pour fixer d'un seul tenant un aimant cylindrique (21) sur l'enveloppe (20).
PCT/JP2011/055401 2010-04-30 2011-03-08 Moteur sans noyau cylindrique WO2011135930A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180007891.8A CN102742130B (zh) 2010-04-30 2011-03-08 圆筒无芯马达
JP2012512711A JP5728744B2 (ja) 2010-04-30 2011-03-08 円筒コアレスモータ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010105007 2010-04-30
JP2010-105007 2010-04-30

Publications (1)

Publication Number Publication Date
WO2011135930A1 true WO2011135930A1 (fr) 2011-11-03

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PCT/JP2011/055401 WO2011135930A1 (fr) 2010-04-30 2011-03-08 Moteur sans noyau cylindrique

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JP (1) JP5728744B2 (fr)
CN (1) CN102742130B (fr)
WO (1) WO2011135930A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102931797A (zh) * 2012-11-22 2013-02-13 苏州波斯特克精密电机有限公司 一种空心杯电机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019123666A1 (fr) * 2017-12-22 2019-06-27 株式会社シンクテック Moteur sans noyau

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55122484U (fr) * 1979-02-22 1980-08-30
JP2006304491A (ja) * 2005-04-20 2006-11-02 Namiki Precision Jewel Co Ltd 表面実装型振動モータ
JP2007181350A (ja) * 2005-12-28 2007-07-12 Namiki Precision Jewel Co Ltd ラジコン用サーボユニットのモータ構造
JP2008099355A (ja) * 2006-10-06 2008-04-24 Seiko Instruments Inc モータ用軸受装置及び振動モータ
JP2009268330A (ja) * 2008-04-30 2009-11-12 Ricoh Elemex Corp コアレスモータ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4589786B2 (ja) * 2005-03-31 2010-12-01 日本電産サンキョー株式会社 モータ用ロータおよびモータ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55122484U (fr) * 1979-02-22 1980-08-30
JP2006304491A (ja) * 2005-04-20 2006-11-02 Namiki Precision Jewel Co Ltd 表面実装型振動モータ
JP2007181350A (ja) * 2005-12-28 2007-07-12 Namiki Precision Jewel Co Ltd ラジコン用サーボユニットのモータ構造
JP2008099355A (ja) * 2006-10-06 2008-04-24 Seiko Instruments Inc モータ用軸受装置及び振動モータ
JP2009268330A (ja) * 2008-04-30 2009-11-12 Ricoh Elemex Corp コアレスモータ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102931797A (zh) * 2012-11-22 2013-02-13 苏州波斯特克精密电机有限公司 一种空心杯电机

Also Published As

Publication number Publication date
JP5728744B2 (ja) 2015-06-03
CN102742130A (zh) 2012-10-17
CN102742130B (zh) 2015-02-25
JPWO2011135930A1 (ja) 2013-07-18

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