WO2008069016A1 - 直流モータ - Google Patents
直流モータ Download PDFInfo
- Publication number
- WO2008069016A1 WO2008069016A1 PCT/JP2007/072393 JP2007072393W WO2008069016A1 WO 2008069016 A1 WO2008069016 A1 WO 2008069016A1 JP 2007072393 W JP2007072393 W JP 2007072393W WO 2008069016 A1 WO2008069016 A1 WO 2008069016A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- bearing
- motor
- pipe
- ball bearing
- Prior art date
Links
Classifications
-
- 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
- H02K23/62—Motors or generators with stationary armatures and rotating excitation field
-
- 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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
-
- 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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/003—Structural associations of slip-rings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/006—Structural associations of commutators
Definitions
- the present invention is used in, for example, a direct current motor for driving an exhaust gas recirculation (EGR) valve device for constituting an exhaust gas recirculation system.
- EGR exhaust gas recirculation
- a conventional DC motor has a configuration in which a rotor is held by two ball bearings! (See, for example, Patent Document 1).
- Patent Document 1 International Publication 2001-05018 (Fig. 2)
- one of the two bearings holding the rotor is a sleeve bearing, and the other is This type of bearing is considered to be a direct current motor with a ball bearing with a load capacity greater than that of a sleeve bearing and a ball bearing with a greater load capacity than that of a sleeve bearing.
- the force rotor that increases the axial size of the ball bearing which is the other bearing, is made of resin. Therefore, by reducing the amount of resin in the axial direction of the mouth by the amount that the axial size of the ball bearing is larger, the shaft of the DC motor can be increased even if the axial size of the ball bearing is increased. The size of the direction is not increased.
- the outer diameter size of the ball bearing is conventionally increased. Accordingly, it is necessary to increase the size of the ball bearing in the inner diameter direction.
- the radial thickness of the rotor held by the ball bearing is reduced. Since the rotor is made of resin and the rotor portion held by the ball bearing is hollow, the rotor holding strength and durability will deteriorate if the radial thickness of the rotor decreases. There was a problem.
- the present invention has been made to solve the above-described problems, and is a direct current motor capable of reducing the size of a DC motor without deteriorating the holding strength and durability of the rotor. Is what you get.
- a stator having a plurality of coils, a port having a plurality of magnetic poles arranged to face the inner periphery of the stator, and having a metal member at one end And a current-carrying portion that is provided at the other end of the rotor and commutates the current supplied from the power source to the stator coil, a first bearing that holds the rotor, and a rotor that holds the rotor compared to the first bearing. And a second bearing that receives a large load, and the metal member holds the second bearing and directly contacts the second bearing.
- the invention's effect [0010] According to the present invention, it is possible to reduce the axial direction of a DC motor without deteriorating the holding strength and durability of the rotor.
- FIG. 1 is a cross-sectional view showing a configuration of a DC motor according to Embodiment 1 of the present invention.
- FIG. 2 is a plan view showing a method for manufacturing the stator 2 in the DC motor shown in FIG. 1.
- FIG. 1 is a plan view showing a method for manufacturing the stator 2 in the DC motor shown in FIG. 1.
- FIG. 3 shows a current flow of the energization section 19 in the DC motor shown in FIG. 1, (A) is a plan view of the stator 2 and the rotor 8, and (B) is a sectional side view of the DC motor.
- FIG. 4 is a diagram showing the shape of the plate 12 in the DC motor shown in FIG. 1, (A) is a side view, and (B) is a plan view.
- FIG. 5 is a diagram showing the shape of the pipe 11 in the DC motor shown in FIG. 1, wherein (A) is a plan view and (B) is a cross-sectional view.
- FIG. 1 is a cross-sectional view showing a configuration of a DC motor according to Embodiment 1 of the present invention.
- FIG. 2 is a plan view showing a method of manufacturing a stator in the DC motor shown in FIG.
- 1 is a motor case formed of a resin material
- 2 is a stator formed integrally with the motor case 1 and a resin mold, and the magnetic teeth 3a protrude as shown in FIG. 2 (A).
- a winding machine (not shown) is formed in order to form a stator core 3 by laminating a predetermined number of magnetic materials in which the core pieces 3b to be connected are laminated through thin-walled portions 3c. 2), the coil teeth 4a are applied to the magnetic pole teeth 3a, and the thin portions 3c are bent as shown in FIG. 2 (B) to form an annular shape.
- Reference numeral 5 denotes a flange member attached to one end of the motor case 1, and a boss portion 5a for holding the shaft 10 is formed at the center portion so as to protrude.
- 6 is a sleeve bearing as a first bearing
- 7 is a ball bearing as a second bearing
- this ball bearing 7 is a bearing having a larger load resistance than the sleeve bearing 6.
- the sleeve bearing 6 is thinner than the ball bearing 7 in the radial direction.
- Reference numeral 8 denotes a rotor in which both ends are held by a sleeve bearing 6 and a ball bearing 7, and a plurality of permanent magnet magnetic poles 9 are disposed on the outer peripheral portion at positions corresponding to the magnetic pole teeth 3a of the stator 2.
- a shaft 10 is linearly movable in the axial direction according to the rotation of the rotor 8.
- a valve that opens and closes an exhaust passage (not shown) and an intake passage (not shown) according to the linear movement of the shaft 10 in the axial direction.
- a member (not shown) moves linearly in the axial direction, and by opening or closing the valve member, a part of the exhaust gas is recirculated to the intake passage, or the amount of exhaust gas to be recirculated is adjusted.
- 11 is a pipe as a metal member provided on one end side of the rotor 8 and holding the ball bearing 7.
- the pipe 11 is in direct contact with the wall surface of the inner ring of the ball bearing 7.
- a plate 12 supports the inner ring of the ball bearing 7 in the axial direction, and the pipe 11 and the plate 12 are fixed by welding or the like.
- the outer ring of the ball bearing 7 is positioned in the axial direction by the motor case 2.
- 13 is a disk that is fixed to or integrally molded with the other end of the rotor 8 and rotates together with the rotor 8.
- 14 is a commutator formed by dividing the outer peripheral portion of the disc 13 in the circumferential direction, and the contact surface of the rectifier 14 is formed in the radial direction.
- Reference numeral 15 denotes a slip ring formed by concentric annular division into n (in the figure, three divisions) on the inner peripheral side of the commutator 14, and the contact surface of the slip ring 15 is formed in the axial direction.
- Reference numeral 16 denotes a braggette attached to the other end of the motor case 1.
- Reference numeral 17 denotes a pair of first brushes that are insulated and supported by the bracket 16 and whose tip side is slidably in contact with the contact surface of the commutator 14 through a predetermined pressure by an elastic body such as a coil spring. The first brush 17 also brings the radial force into contact with the commutator 14.
- Reference numeral 18 denotes three second brushes that are insulated and supported by the bracket 16 and whose tip is in contact with the contact surface of each slip ring 15 slidably through a predetermined pressure by an elastic body such as a spring member. The second brush 18 is in contact with each slip ring 15 from the axial direction.
- the energizing section 19 is composed of 13 to 15.
- FIG. 3 shows a current flow of the energizing section 19 in the DC motor shown in FIG. 1, (A) is a plan view of the stator 2 and the rotor 8, and (B) is a sectional side view of the DC motor.
- the rotor 8 is held by the sleeve bearing 6 and the ball bearing 7 and the pipe 11 for holding the ball bearing 7 is brought into direct contact with the ball bearing 7. It is configured.
- the direct current motor shown in FIG. 1 has the bearing strength and durability of the rotor 8 because the ball bearing 7 and the pipe 11 made of a metal member that is stronger than resin are in direct contact. This makes it possible to reduce the size of the DC motor in the axial direction without causing deterioration.
- this DC motor uses a pipe 11 as a metal member.
- the pipe 11 since the pipe 11 has a hollow shape, it is not necessary to secure a space for inserting the shaft 10 by post-processing, and workability is improved.
- TIG welding is a method in which a tungsten electrode (T) that is resistant to heat is used, and an inert gas (inert gas, I) is allowed to flow around it.
- TIG welding requires grounding, a certain amount of space is required for welding. Therefore, TIG welding is not suitable for small products such as the DC motor of the present invention.
- laser welding is used for welding.
- This laser welding is a method of joining by melting and solidifying the metal locally by irradiating it with the laser beam focused mainly on the metal as a heat source, and it is not necessary to ground it like TIG welding.
- the direct current motor of the present invention is optimal when used in a product that requires downsizing, such as an EGR valve device.
- the shape of the plate 12 is not described in detail, but the shape of the plate 12 has a bent portion and extends the plate 12 in the radial direction so as to cover the ball bearing 7. It is even better if it has a shape.
- FIG. 4 is a view showing the shape of the plate 12 in the DC motor shown in FIG. 1, wherein (A) is a side view and (B) is a plan view.
- the shape of the plate 12 of the DC motor of the present invention is a shape having a bent portion 20 as shown in FIG.
- the plate 12 has a shape having the bent portion 20 as described above.
- the direction S of the plate 12 having the bent portion 20 is smaller than that of the flat plate 12. It is known that it is difficult to deform. Since the bent portion 20 is provided in the plate 12 of the direct current motor of the present invention, the shape is less likely to be thermally deformed compared to the flat plate 12. Therefore, the plate 12 and the ball bearing 7 are deformed by the thermal deformation of the plate 12. This solves the problem of gaps between them, prevents rattling between the plate 12 and the ball bearing 7, and allows the DC motor to be controlled well.
- the plate 12 may be further configured to cover the ball bearing 7.
- the pipe 11 is not described in detail, but the pipe 11 may be further formed by insert molding with respect to the rotor 8. Insert molding the pipe 11 and the rotor 8 can improve the coaxial accuracy between the nozzle 11 and the rotor 8, so the backlash of the rotor 8 caused by the misalignment between the axis of the pipe 11 and the axis of the rotor 8 can be improved. It is possible to prevent sticking and to control the DC motor well.
- the pipe 11 is preferably provided with a hole in the insert mold portion of the pipe 11 when integrally molded with the rotor 8 and resin.
- FIG. 5A and 5B are diagrams showing the shape of the pipe 11 in the DC motor shown in FIG. 1, wherein FIG. 5A is a plan view and FIG. 5B is a cross-sectional view.
- the resin flows into the hole 21 when the pipe 11 and the rotor 8 are integrally molded with the resin. improves.
- the size and number of the holes 21 are such that a sufficiently large resin shear is obtained with respect to the reaction force generated in the rotor 8 when the shaft 10 moves in the axial direction in accordance with the rotation of the rotor 8. It is even better to set it like this.
- the pipe 11 is preferably formed by rounding a plate material.
- the hole 21 for improving the holding strength in the axial direction is formed in the pipe 11, it is better to form the pipe 11 by opening the hole 21 in advance and then rounding the plate material than to open the hole 21 in the pipe material.
- the hole 21 can be easily formed, the cost can be reduced.
- the taper 22 is provided on the end surface of the pipe 11 as shown in FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Dc Machiner (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20070832123 EP2089954B1 (en) | 2006-12-04 | 2007-11-19 | Dc motor |
US12/514,756 US8093774B2 (en) | 2006-12-04 | 2007-11-19 | Direct current motor |
JP2008525288A JPWO2008069016A1 (ja) | 2006-12-04 | 2007-11-19 | 直流モータ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006326842 | 2006-12-04 | ||
JP2006-326842 | 2006-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008069016A1 true WO2008069016A1 (ja) | 2008-06-12 |
Family
ID=39491920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/072393 WO2008069016A1 (ja) | 2006-12-04 | 2007-11-19 | 直流モータ |
Country Status (5)
Country | Link |
---|---|
US (1) | US8093774B2 (ja) |
EP (1) | EP2089954B1 (ja) |
JP (1) | JPWO2008069016A1 (ja) |
KR (1) | KR101030818B1 (ja) |
WO (1) | WO2008069016A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6440254U (ja) * | 1987-09-03 | 1989-03-10 | ||
JP2000037069A (ja) * | 1998-07-15 | 2000-02-02 | Toshiba Tec Corp | ステッピングモータ |
JP2005012917A (ja) * | 2003-06-19 | 2005-01-13 | Matsushita Electric Ind Co Ltd | ブラシレスモータ |
JP2005253137A (ja) * | 2004-03-01 | 2005-09-15 | Mitsubishi Material Cmi Kk | モータ |
JP2005253138A (ja) * | 2004-03-01 | 2005-09-15 | Mitsubishi Material Cmi Kk | モータ |
JP2006090390A (ja) * | 2004-09-22 | 2006-04-06 | Nippon Densan Corp | スピンドルモータの軸受構造とその組立方法 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS58112452A (ja) * | 1981-12-24 | 1983-07-04 | Matsushita Electric Works Ltd | フラツトモ−タのロ−タ |
CH657721A5 (de) * | 1982-01-11 | 1986-09-15 | Papst Motoren Gmbh & Co Kg | Aussenlaeufer-direktantriebsmotor. |
JPS62166755A (ja) * | 1986-01-16 | 1987-07-23 | Sanyo Electric Co Ltd | 永久磁石付回転子 |
CA1278706C (en) * | 1986-12-08 | 1991-01-08 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government | Electrical spin rig for projectile wind tunnel testing |
JPH01255453A (ja) * | 1988-04-04 | 1989-10-12 | Toshiba Corp | 回転電機固定子及びその製造方法 |
GB2217924B (en) * | 1988-04-25 | 1992-10-07 | Matsushita Electric Works Ltd | Permanent magnet rotor |
JPH0251714U (ja) | 1988-10-07 | 1990-04-12 | ||
JP2525989Y2 (ja) | 1990-08-31 | 1997-02-12 | スターテング工業株式会社 | リコイルスタータ |
JPH06335226A (ja) * | 1993-05-18 | 1994-12-02 | Asmo Co Ltd | Pm型ステッピングモータ |
US5683183A (en) * | 1995-09-26 | 1997-11-04 | Nsk Ltd. | Spindle device and bearing device therefor |
DE19730998C2 (de) * | 1996-07-19 | 2001-10-31 | Hitachi Ltd | Motorbetätigtes Durchflußmengensteuerventil und Abgasrückführungssteuerventil für Verbrennungsmotoren |
US6091568A (en) * | 1998-02-17 | 2000-07-18 | International Business Machines Corporation | Labyrinth seal for minimizing flow gradients leading to aerosoling of contaminants external to spindles |
JP3320355B2 (ja) * | 1998-04-13 | 2002-09-03 | マブチモーター株式会社 | 小型モータの製造方法 |
JP3864008B2 (ja) * | 1999-02-09 | 2006-12-27 | 三菱電機株式会社 | バルブ装置 |
CN1161873C (zh) | 1999-07-13 | 2004-08-11 | 三菱电机株式会社 | 直流电动机通电装置 |
JP2002037104A (ja) | 2000-07-28 | 2002-02-06 | Showa Corp | 電動パワーステアリング装置 |
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JP2003032955A (ja) | 2001-07-11 | 2003-01-31 | Mitsuba Corp | モータのアーマチュア支持構造 |
JP2004236390A (ja) * | 2003-01-29 | 2004-08-19 | Tokyo Parts Ind Co Ltd | 小型ブラシレスモータ |
JP2005261029A (ja) | 2004-03-10 | 2005-09-22 | Nsk Ltd | 電動アクチュエータ |
JP4417181B2 (ja) | 2004-06-15 | 2010-02-17 | 三菱電機株式会社 | モータの軸受保持構造 |
KR101054421B1 (ko) * | 2004-06-24 | 2011-08-04 | 엘지전자 주식회사 | 세탁기의 모터 |
WO2006025444A1 (ja) * | 2004-08-31 | 2006-03-09 | Asmo Co., Ltd. | モータ |
JP4706215B2 (ja) * | 2004-09-21 | 2011-06-22 | 日産自動車株式会社 | 複軸多層型回転電機のステータ構造 |
-
2007
- 2007-11-19 WO PCT/JP2007/072393 patent/WO2008069016A1/ja active Application Filing
- 2007-11-19 EP EP20070832123 patent/EP2089954B1/en active Active
- 2007-11-19 US US12/514,756 patent/US8093774B2/en active Active
- 2007-11-19 KR KR1020097010209A patent/KR101030818B1/ko active IP Right Grant
- 2007-11-19 JP JP2008525288A patent/JPWO2008069016A1/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6440254U (ja) * | 1987-09-03 | 1989-03-10 | ||
JP2000037069A (ja) * | 1998-07-15 | 2000-02-02 | Toshiba Tec Corp | ステッピングモータ |
JP2005012917A (ja) * | 2003-06-19 | 2005-01-13 | Matsushita Electric Ind Co Ltd | ブラシレスモータ |
JP2005253137A (ja) * | 2004-03-01 | 2005-09-15 | Mitsubishi Material Cmi Kk | モータ |
JP2005253138A (ja) * | 2004-03-01 | 2005-09-15 | Mitsubishi Material Cmi Kk | モータ |
JP2006090390A (ja) * | 2004-09-22 | 2006-04-06 | Nippon Densan Corp | スピンドルモータの軸受構造とその組立方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2089954A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20100026118A1 (en) | 2010-02-04 |
KR101030818B1 (ko) | 2011-04-22 |
JPWO2008069016A1 (ja) | 2010-03-18 |
EP2089954A1 (en) | 2009-08-19 |
EP2089954B1 (en) | 2015-04-29 |
US8093774B2 (en) | 2012-01-10 |
KR20090074242A (ko) | 2009-07-06 |
EP2089954A4 (en) | 2014-07-02 |
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