WO2005124978A1 - ステッピングモータ - Google Patents
ステッピングモータ Download PDFInfo
- Publication number
- WO2005124978A1 WO2005124978A1 PCT/JP2005/011426 JP2005011426W WO2005124978A1 WO 2005124978 A1 WO2005124978 A1 WO 2005124978A1 JP 2005011426 W JP2005011426 W JP 2005011426W WO 2005124978 A1 WO2005124978 A1 WO 2005124978A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lead screw
- stepping motor
- permanent magnet
- screw portion
- rotating shaft
- Prior art date
Links
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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2788—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
- H02K37/24—Structural association with auxiliary mechanical devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
Definitions
- the present invention relates to a small stepping motor and a lead screw section provided on an output side of a rotating shaft thereof.
- a rotating shaft and an outer peripheral side of the rotating shaft are mounted.
- a stepping motor including a rotor having a permanent magnet and a stator having pole teeth radially opposed to the permanent magnet is known.
- an output shaft protruding from a stator is provided on the output side of a rotating shaft, and a lead screw portion is formed on the output shaft.
- the lead screw portion is screwed to a moving body such as an optical head device to move the moving body at a high speed.
- CD / DVD players have been demanded to be smaller and thinner for video cameras and the like, and there has been a strong demand for smaller moving objects such as optical head devices, and thus smaller size for stepping motors.
- the demand for conversion is also increasing.
- the output shaft on which a lead screw portion is formed is provided separately from the output shaft, and the rotation shaft is reduced in diameter to reduce the size (for example, see Patent Document 1).
- Patent document 1 JP-A-7-241065
- Patent Document 2 JP-A-5-88066
- the maximum self-starting frequency S2 of the stepping motor having the lead screw portion is S1
- the maximum self-starting frequency of the stepping motor not having the lead screw portion is S1
- the inertia of the lead screw portion is 12, and the lead screw is 12.
- Patent Document 2 proposes a configuration in which an aluminum-palladium alloy is used for the output shaft on which the lead screw portion is formed, but the outer diameter of the lead screw portion is 4 mm.
- the diameter of the stepping motor is reduced as described below, and further, when the entire stepping motor is downsized, a specific configuration of the stepping motor for preventing a decrease in the maximum self-starting frequency and ensuring predetermined motor characteristics is provided. A proposal has been made.
- an object of the present invention is to reduce the size of a small-sized stepping motor. Another object of the present invention is to provide a configuration capable of improving motor characteristics.
- an object of the present invention is to provide a small stepping motor capable of preventing a decrease in the maximum self-starting frequency and improving motor characteristics even when an output shaft having a lead screw portion is provided. Is to provide.
- the invention according to claim 1 is directed to a rotor having a rotating shaft and a permanent magnet inserted on the outer peripheral side of the rotating shaft; And a stator having pole teeth opposed to each other, wherein the rotating shaft is also formed with aluminum or aluminum alloy force.
- the present invention provides a stepping motor in which even when the entire stepping motor is downsized, the weight of the rotating shaft is reduced by adopting aluminum or an aluminum alloy having a lower specific gravity than stainless steel. It is possible to reduce the inertial load of a motor that is lightweight and has a rotating shaft and a permanent magnet, and to improve predetermined motor characteristics.
- a stepping motor repeatedly starts and stops at a certain angle each time a pulse frequency is applied, the rotor needs to start and stop instantaneously with respect to the pulse frequency.
- the weight of the rotor is reduced, so that the followability of the rotor to the pulse frequency is improved. That is, the startability and responsiveness of the motor can be improved.
- the output shaft of the rotating shaft further includes an output shaft that also protrudes, and the output shaft is formed of aluminum or an aluminum alloy cover and has a lead star part. I prefer that. With such a configuration, even when the lead screw portion has a small diameter, the output shaft on which the lead screw portion is formed is lightened, so that the maximum self-start frequency of the stepping motor is prevented from lowering. However, it is possible to improve start-up performance and responsiveness, and furthermore, to improve start-up time.
- the inventors of the present application have made various studies. As a result, the outer diameter of the lead screw portion is reduced to less than mm, and even if the entire stepping motor is downsized, the outer diameter of the permanent magnet forming the rotor and the outer diameter of the lead screw portion are reduced.
- the output shaft on which the lead screw portion is formed is made of aluminum or an aluminum alloy, thereby effectively preventing the reduction of the maximum self-oscillation frequency. It has been found that the starting performance and the responsiveness can be further improved, and the starting torque can be further improved.
- the present invention is based on powerful new knowledge, and when the outer diameter of the lead screw portion is D1, and the outer diameter of the permanent magnet is D2,
- the adhesive reservoir formed on the rotating shaft or a part of the lead screw is formed by rolling.
- the surface of the adhesive reservoir or the lead screw formed on the rotating shaft by the rolling process is hardened, so that its rigidity is increased. Therefore, even if the adhesive reservoir and the lead screw are formed with a small diameter, the rotating shaft and the lead screw forming the adhesive reservoir may be used. Even if aluminum or aluminum alloy, which is less rigid than stainless steel, is used as the material of the output shaft that forms the portion, it is possible to form an easy-to-use adhesive reservoir portion and a lead screw portion that are easy to bend.
- an adhesive reservoir formed on the rotating shaft or a part of the lead screw is subjected to aluminum anodizing (alumite) treatment or chromate treatment.
- alumite aluminum anodizing
- chromate treatment for example, an arosin treatment is preferably performed.
- Aluminum or aluminum-aluminum alloy is formed by applying anodizing or chromate treatment to the adhesive pool and lead screw where the adhesive is formed. This prevents corrosion in the adhesive pool and lead stalk. Can be prevented and the abrasion resistance is improved.
- a small stepping motor including a rotor having a rotating shaft and a permanent magnet inserted on the outer peripheral side of the rotating shaft, and a stator having pole teeth radially opposed to the permanent magnet.
- the rotating shaft is also formed with aluminum or aluminum alloy force. Therefore, the weight of the rotor is reduced, so that the inertial load of the rotor can be reduced. As a result, predetermined motor characteristics can be improved.
- the output shaft on which the lead screw portion is formed also has an aluminum or aluminum alloy force, and the outer diameter D1 of the lead screw portion and the outer diameter D2 of the permanent magnet are constant. It is configured to satisfy the relationship. For this reason, even when the lead screw portion has a small diameter and the stepping motor is downsized, a decrease in the maximum self-starting frequency can be more effectively prevented. As a result, predetermined motor characteristics can be improved.
- FIG. 1 is a side sectional view showing a stepping motor according to an embodiment of the present invention. (Configuration of Stepping Motor)
- the stepping motor 1 is a so-called PM type stepping motor, and has a rotor 2 having a rotating shaft 3 and a cylindrical permanent magnet 4, and pole teeth 5 radially opposed to the permanent magnet 4. It includes a stator 6 and a frame 20 attached to the stator 6 on the output side of the rotating shaft 3. Further, on the output side of the rotating shaft 3, an output shaft 3a is formed so as to protrude from the stator 6, and a lead screw portion 3b is formed on the output shaft 3a.
- a bearing holding member 23 is attached to the non-output side of the stator 6 (the base end 3c side of the rotating shaft 3), and a bearing 24 is held by the bearing holding member 23.
- the rotating shaft 3 is formed of a nonmagnetic material such as aluminum or aluminum alloy, and a cylindrical permanent magnet 4 is fixed to the outer peripheral surface thereof using an adhesive or the like.
- an adhesive reservoir 3 is formed on the rotating shaft 3 at a position where the permanent magnet 4 is fixed.
- the adhesive pool 3b and the lead screw 3b formed on the output shaft 3a are also used, that is, a spiral groove force formed between the threads is formed. .
- the adhesive reservoir 3b is also formed in a spiral shape, the adhesive can be applied stably both in the circumferential direction and in the axial direction at the place where the permanent magnet 4 is fixed. Thereby, the adhesive strength with the permanent magnet 4 is increased, and the excess adhesive is prevented from leaking.
- the adhesive reservoir 3b formed on the rotating shaft 3 is formed by rolling, and the adhesive reservoir 3 is further subjected to aluminum anodizing (alumite) treatment or chromate treatment.
- alumite aluminum anodizing
- chromate treatment for example, an alodine treatment is performed.
- the surface treatment of the adhesive pool 3b and the surface treatment have made it chemically stable due to corrosion resistance, etc., and the reaction of the adhesive has occurred stably. To increase the strength.
- the permanent magnet 4 is a permanent magnet made of a rare earth material such as neodymium and is injection-molded or compression-molded. Since the permanent magnet 4 is a known technique, a detailed description thereof will be omitted.
- a sleeve may be interposed between the rotating shaft 3 and the permanent magnet 4.
- the sleeve is made of aluminum, aluminum alloy, synthetic resin, or the like, and is lighter than the permanent magnet 4.
- the outer diameter of the permanent magnet 4 is 8 mm or more, in other words, when the thickness is 2.5 mm or more, the magnetic force is increased even if the thickness of the permanent magnet 4 increases.
- the sleeve is intervened because it is hardly increased.
- the thickness of the permanent magnet with the sleeve in between is not limited to this, but whether or not the sleeve is in the middle depends on the magnetic force of the permanent magnet, the weight of the rotor, and the like.
- the output shaft 3a on which the lead screw portion 3b is formed is formed to protrude from the stator 6, and is made of a nonmagnetic material such as aluminum or an aluminum alloy. As described above, since it is formed of a non-magnetic material, magnetic flux leakage to the outside of the motor main body is unlikely to occur. It's like that.
- the lead screw portion 3b is formed by rolling on the outer peripheral surface of the output shaft 3a, and the lead screw portion 3b is subjected to aluminum anodization (alumite) treatment or chromate treatment.
- alumite aluminum anodization
- chromate chromate treatment
- the lead screw portion 3b is for screwing with a moving object such as an optical head device of a CD'DVD player to move the moving object.
- the lead screw portion 3b in the present embodiment is for moving a small moving object, when its outer diameter is D1,
- the lead screw portion 3b and the permanent magnet 4 are formed so as to satisfy a certain relationship. More specifically, when the outer diameter of the permanent magnet 4 is D2,
- the lead screw portion 3b and the permanent magnet 4 are formed so as to satisfy the following relationship.
- the outer diameter D1 of the lead screw portion 3b is 3 mm
- the outer diameter D2 of the permanent magnet 4 is 6 mm.
- the outer diameter D1 of the lead screw portion 3b corresponds to the outer diameter of the output shaft 3a.
- a concave portion 3d into which a part of the spherical pivot 19 is inserted is formed in the axial direction.
- a concave portion 3e into which a part of the spherical pivot 22 is inserted is also formed in the output side end of the output shaft 3a in the axial direction.
- the stator 6 also includes a first stator set 7 and a second stator set 8, and a force, and the stator sets 7, 8 are arranged so as to overlap in the axial direction.
- the first stator set 7 includes a first outer stator core 10, a first bobbin 11 on which a coil is wound, and a first inner core that sandwiches the first bobbin 11 between the first outer stator core 10. It is composed of a stator core 12 and is located on the output side of the rotating shaft 3.
- a plurality of pole teeth 5 formed on each of the first outer stator core 10 and the first inner stator core 12 are arranged on the inner peripheral side of the first bobbin 11 so as to be adjacent to each other in the circumferential direction.
- the second stator set 8 includes a second outer stator core 14, a second bobbin 15 on which a coil is wound, and a second bobbin 15 that sandwiches the second bobbin 15 between the second outer stator core 14. 2 and a stator core 16, which is located on the opposite side to the output side of the rotating shaft 3.
- a plurality of pole teeth 5 formed on each of the second outer stator core 14 and the second inner stator core 16 are arranged on the inner peripheral side of the second bobbin 15 so as to be adjacent to each other in the circumferential direction.
- the frame 20 attached to the stator 6 on the output side of the rotating shaft 3 is a metal frame formed of a metal plate such as a stainless steel plate, and has a groove shape having a bottom surface 20a and side surfaces 20b and 20c. Is formed.
- the side surface portion 20b is located on the opposite side to the output side, and the frame 20 is attached to the stator 6 by fixing the side surface portion 20b to the first outer stator core 10 constituting the stator 6. Further, a through hole 20b1 into which the rotating shaft 3 and the output shaft 3a are loosely inserted is formed in the side surface portion 20b.
- the side surface portion 20c is located on the output side, and a resin bearing 21 having a concave portion into which a part of the pivot 22 is inserted is fixed.
- the output side end of the rotor 2 is supported by the bearing 21 and the pivot 22 in the radial direction and the thrust direction.
- the bearing holding member 23 attached to the non-output side of the stator 6 (the base end 3c side of the rotating shaft 3) is an annular member, and a part of the pivot 19 is provided on the inner peripheral side thereof.
- a resin bearing 24 having a concave portion to be inserted is held.
- an end plate 18 formed of a thin metal plate such as a stainless steel plate is attached to the end surface of the bearing holding member 23 opposite to the output side. At the center of the end plate 18 is provided a cut-and-raised plate panel (not shown).
- the plate panel is provided with the rotating shaft 3 on the output side via a bearing 24 and a pivot 19. I'm running.
- the non-output side end of the rotor 2 is supported in the radial direction and the thrust direction by the plate panel, the bearing 24 and the pivot 19.
- the rotating shaft 3 is formed by aluminum or aluminum alloy force
- the weight of the rotor 2 having the rotating shaft 3 and the permanent magnet 4 is reduced. Therefore, the inertial load on the rotor 2 can be reduced. As a result, it is possible to improve the motor characteristics of the stepping motor 1, particularly the startability and the responsiveness.
- a spiral adhesive pool (lead screw portion) 3b is formed on the rotating shaft 3, so that it is stable both in the circumferential direction and in the axial direction where the permanent magnet 4 is fixed. To apply the adhesive. Thereby, the adhesive strength with the permanent magnet 4 is increased, and the excess adhesive is prevented from leaking.
- the adhesive reservoir 3b formed on the rotating shaft 3 is formed by rolling, and the adhesive reservoir 3 is subjected to aluminum anodizing (alumite) treatment or chromate treatment. I have. As described above, the surface treatment of the adhesive pool 3b also provides corrosion resistance and the like, chemically stabilizes, and the reaction of the adhesive occurs stably. The bonding strength can be further increased.
- the rigidity of the rotating shaft 3 can be increased.
- the output in which the lead screw portion 3b is formed While the shaft 3a also forms an aluminum or aluminum alloy force, the outer diameter D1 of the lead screw portion 3b and the outer diameter D2 of the permanent magnet are
- the output shaft 3a is formed of aluminum or an aluminum alloy. The reduction of the maximum self-starting frequency can be effectively prevented.
- this effect in the present embodiment will be described in detail with reference to FIGS.
- FIGS. 2 (A) and 2 (B) show the case where the outer diameter of the lead screw portion is 2 mm and the material of the output shaft 3a on which the lead screw portion is formed is changed to stainless steel and aluminum alloy.
- 5 is a table showing the relationship between the rise rate of the maximum self-starting frequency and the outer diameter of the permanent magnet, and the configuration conditions of the rotor.
- 3 (A) and 3 (B) when the outer diameter of a part of the lead screw is set to 3 mm, the material of the output shaft 3a on which the lead screw portion is formed is changed to stainless steel aluminum alloy.
- 3 is a graph showing the relationship between the rate of increase of the maximum self-starting frequency and the outer diameter of the permanent magnet at that time, and a table showing the constituent conditions of the rotor.
- Figs. 4 (A) and (B) show the case where the outer diameter of the lead screw part is 4 mm and the material of the output shaft 3a on which the lead screw part is formed is changed to stainless steel and aluminum alloy.
- 3 is a graph showing the relationship between the rate of increase of the maximum self-starting frequency and the outer diameter of the permanent magnet, and a table showing the configuration conditions of the rotor.
- the present embodiment when the outer diameter D1 of the lead screw portion 3b is 2 mm and the outer diameter D2 of the permanent magnet 4 is gradually reduced from 12 mm to 7 mm, the present embodiment Then, even if the material of the output shaft 3a is changed to stainless steel or aluminum alloy, the maximum self-starting frequency hardly changes. On the other hand, when the outer diameter D2 of the permanent magnet 4 is reduced to 7 mm or less, if the material of the output shaft 3a is changed to a stainless steel aluminum alloy, the rate of increase of the maximum self-starting frequency increases.
- the configuration of the rotor 2 at each outer diameter D2 of the permanent magnet 4 is set as shown in FIG. 2B in consideration of a general stepping motor having a lead screw portion 3b.
- the sleeve in FIG. 2 (B) means that when the outer diameter D2 of the permanent magnet 4 is relatively large, It is a cylindrical member provided between the rotating shaft 3 and the permanent magnet 4. Accordingly, the outer diameter of the sleeve substantially matches the inner diameter of the permanent magnet 4, and the inner diameter substantially matches the outer diameter of the rotating shaft 3.
- the permanent magnet 4 has a specific gravity of 5.8 (gZcm 3 ), and the sleeve has a specific gravity of 3 (g / cm 3 ).
- the rotary shaft 3 and the output shaft 3a formed integrally therewith have a length of 57 mm.
- the outer diameter D1 of the lead screw portion 3b was 4 mm
- the outer diameter D2 of the permanent magnet 4 was gradually reduced from 12 mm to 9 mm. Even when the material of the output shaft 3a is changed to stainless steel or aluminum alloy, the rate of increase of the maximum self-starting frequency is small.
- the outer diameter D2 of the permanent magnet 4 is reduced to 9 mm or less, if the material of the output shaft 3a is changed to a stainless steel aluminum alloy, the maximum self-starting frequency increases.
- the configuration of the rotor 2 is set as shown in FIG. 4B in consideration of a general stepping motor including the lead screw portion 3b.
- the output shaft 3a on which the lead screw portion 3b is formed is formed of an aluminum alloy, so that the output shaft 3a is formed of stainless steel. It has been confirmed that the rate of increase of the maximum self-starting frequency can be increased compared to the case in which this was done.
- the outer diameter D1 of the lead screw portion 3b is 4 mm or less, D2> Dl + 5 (mm)
- the material of the output shaft 3a on which the lead screw portion 3b is formed is made of an aluminum alloy, so that the stepping motor 1 can be more effectively formed.
- the reduction of the maximum self-starting frequency can be prevented, and the motor characteristics of the stepping motor 1 can be improved.
- the lead screw portion 3b is formed of a rolled kneader. Therefore, the surface of the lead screw portion 3b is hardened with the rolling force and the rigidity of the lead screw portion 3b is increased. Therefore, even if the outer diameter of the lead screw portion 3b is made as thin as 4 mm or less, and even if aluminum or an aluminum alloy is used as the material of the output shaft 3a, the lead screw portion 3b is formed with ease in bending. can do.
- the lead screw portion 3b is subjected to aluminum anodic oxidation (alumite treatment) or chromate treatment.
- aluminum anodic oxidation alumite treatment
- chromate treatment alumite treatment
- corrosion of the lead screw portion 3b can be prevented. Also, the wear resistance is improved.
- the rotating shaft 3 has the adhesive reservoir 3 formed therein, and the output shaft 3a formed integrally with the rotating shaft 3 has the lead screw portion 3b formed therein.
- the lead screw portion 3b may be formed only on the output shaft 3a without forming the adhesive reservoir 3 on the output shaft 3a.
- the outer peripheral surface of the rotating shaft 3 where the adhesive reservoir 3 is not formed may be subjected to aluminum anodizing or achromating.
- the permanent magnet 4 is fixed, and the rotating shaft 3 which also has an aluminum or aluminum alloy force is a small-diameter member 32, which forms a lead screw 3b, and the output which also has an aluminum or aluminum alloy force. It is also possible to configure a two-member power member in which the shaft 3a is the large-diameter member 33.
- the rotating shaft 3 and the output shaft 3a are constituted by two members, and the end surface of the small diameter member 32 is formed in a hemispherical shape instead of the pivot 19. Since it has the same configuration as the configuration in the above embodiment except that it is configured as a pivot, the same configuration is denoted by the same reference numeral.
- FIG. 1 is a side sectional view showing a stepping motor according to an embodiment of the present invention.
- FIG. 2 (A) and (B) show the maximum values when the outer diameter of the lead screw part is 2 mm and the material of the output shaft on which the lead screw part is formed is also stainless steel.
- 3 is a graph showing a relationship between a rising rate of a self-starting frequency and an outer diameter of a permanent magnet, and a table showing a condition of a rotor.
- FIG. 3 (A) and (B) show the maximum values when the outer diameter of the lead screw part was 3 mm and the material of the output shaft on which the lead screw part was formed was changed from stainless steel to aluminum alloy.
- 3 is a graph showing a relationship between a rising rate of a self-starting frequency and an outer diameter of a permanent magnet, and a table showing a condition of a rotor.
- FIG. 4 (A) and (B) show the maximum values when the outer diameter of the lead screw was 4 mm and the material of the output shaft on which the lead screw was formed was changed from stainless steel to aluminum alloy.
- 3 is a graph showing a relationship between a rising rate of a self-starting frequency and an outer diameter of a permanent magnet, and a table showing a condition of a rotor.
- FIG. 5 is a side sectional view showing a stepping motor according to another embodiment of the present invention. Explanation of reference numerals
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Moving Of Heads (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/630,628 US20090200877A1 (en) | 2004-06-22 | 2005-06-22 | Stepping motor |
JP2006514851A JPWO2005124978A1 (ja) | 2004-06-22 | 2005-06-22 | ステッピングモータ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-184204 | 2004-06-22 | ||
JP2004184204 | 2004-06-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005124978A1 true WO2005124978A1 (ja) | 2005-12-29 |
Family
ID=35510048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/011426 WO2005124978A1 (ja) | 2004-06-22 | 2005-06-22 | ステッピングモータ |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090200877A1 (ja) |
JP (1) | JPWO2005124978A1 (ja) |
CN (1) | CN1961469A (ja) |
WO (1) | WO2005124978A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007252121A (ja) * | 2006-03-17 | 2007-09-27 | Nidec Sankyo Corp | モータ |
WO2014027485A1 (ja) * | 2012-08-17 | 2014-02-20 | 日本電産サンキョー株式会社 | モータ |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9598141B1 (en) * | 2016-03-07 | 2017-03-21 | Future Motion, Inc. | Thermally enhanced hub motor |
US10112680B2 (en) | 2016-03-07 | 2018-10-30 | Future Motion, Inc. | Thermally enhanced hub motor |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07194084A (ja) * | 1992-03-30 | 1995-07-28 | Shicoh Eng Co Ltd | 揺動ブラシレスアクチュエ−タ |
JPH07241065A (ja) * | 1994-02-25 | 1995-09-12 | Fuji Elelctrochem Co Ltd | リードスクリュー型ステッピングモータ |
JPH10296370A (ja) * | 1997-04-22 | 1998-11-10 | Nissei:Kk | ねじ転造盤の曲がり防止機構およびその方法 |
JP2003154430A (ja) * | 2001-11-19 | 2003-05-27 | Sankyo Seiki Mfg Co Ltd | 螺子付き回転軸及びその製造方法 |
JP2003321776A (ja) * | 2002-05-01 | 2003-11-14 | Sakahito Kobayashi | アルミニウム製硬化軽量部品及び製造方法 |
-
2005
- 2005-06-22 JP JP2006514851A patent/JPWO2005124978A1/ja active Pending
- 2005-06-22 CN CNA2005800158762A patent/CN1961469A/zh active Pending
- 2005-06-22 US US11/630,628 patent/US20090200877A1/en not_active Abandoned
- 2005-06-22 WO PCT/JP2005/011426 patent/WO2005124978A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07194084A (ja) * | 1992-03-30 | 1995-07-28 | Shicoh Eng Co Ltd | 揺動ブラシレスアクチュエ−タ |
JPH07241065A (ja) * | 1994-02-25 | 1995-09-12 | Fuji Elelctrochem Co Ltd | リードスクリュー型ステッピングモータ |
JPH10296370A (ja) * | 1997-04-22 | 1998-11-10 | Nissei:Kk | ねじ転造盤の曲がり防止機構およびその方法 |
JP2003154430A (ja) * | 2001-11-19 | 2003-05-27 | Sankyo Seiki Mfg Co Ltd | 螺子付き回転軸及びその製造方法 |
JP2003321776A (ja) * | 2002-05-01 | 2003-11-14 | Sakahito Kobayashi | アルミニウム製硬化軽量部品及び製造方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007252121A (ja) * | 2006-03-17 | 2007-09-27 | Nidec Sankyo Corp | モータ |
JP4727467B2 (ja) * | 2006-03-17 | 2011-07-20 | 日本電産サンキョー株式会社 | モータ |
WO2014027485A1 (ja) * | 2012-08-17 | 2014-02-20 | 日本電産サンキョー株式会社 | モータ |
JP2014039411A (ja) * | 2012-08-17 | 2014-02-27 | Nidec Sankyo Corp | モータ |
Also Published As
Publication number | Publication date |
---|---|
US20090200877A1 (en) | 2009-08-13 |
CN1961469A (zh) | 2007-05-09 |
JPWO2005124978A1 (ja) | 2008-04-17 |
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