WO2014046101A1 - ステータの固定構造 - Google Patents
ステータの固定構造 Download PDFInfo
- Publication number
- WO2014046101A1 WO2014046101A1 PCT/JP2013/075072 JP2013075072W WO2014046101A1 WO 2014046101 A1 WO2014046101 A1 WO 2014046101A1 JP 2013075072 W JP2013075072 W JP 2013075072W WO 2014046101 A1 WO2014046101 A1 WO 2014046101A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stator
- frame
- fixing structure
- peripheral surface
- protruding portion
- Prior art date
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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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
Definitions
- the present invention relates to a stator fixing structure for fixing a stator to a frame of a rotating machine.
- a stator fixing structure for fixing a stator to a frame of a rotating machine is conventionally known.
- patent document 1 while providing the protrusion part which protrudes to radial direction in the outer peripheral part of the stator which laminates
- a fastening member is inserted to fix the stator to a frame (also referred to as a base portion), and the inner peripheral surface of the frame facing the stator at both ends of the base of the projection (the circumferential end of the base of the projection) is the outer peripheral surface of the stator.
- the fixing material prevents the fixing material from entering the protrusions from the gaps between the plurality of plate-like members by tightly fixing.
- FIG. 2 and paragraph [0009] of the cited document 1 a method of fastening the stator to the frame with a fastening member is described.
- the rotation by the electromagnetic force generated when the stator winding is energized only by fastening with the fastening member There is a possibility that the stator may be deformed or rotated without being able to receive the rotational force applied by the magnetic field in the circumferential direction of the stator.
- the fastening method using the fastening member there is also a fastening method that uses both the frame and the stator by shrink-fitting.
- a tooth portion 1 a around which a winding (not shown) is wound is formed on the inner peripheral side of the stator 1, while a protruding portion 2 that protrudes radially on the outer periphery of the stator 1.
- a fastening member (not shown, for example, a bolt or the like) is inserted into a fastening member insertion hole 3 formed in the projecting portion 2 to fix the stator 1 to the frame 8.
- the outer peripheral surface of the part excluding the part 2 and the inner peripheral surface of the frame 8 are shrink-fitted and fixed.
- the contact portion between the stator 1 fixed by shrinkage and the inner peripheral surface of the frame 8 is referred to as a shrinkage fitting portion 7 (indicated by hatching in FIG. 2).
- the protrusion 2 has a substantially triangular shape, the wider the base of the protrusion 2, the larger the proportion of the protrusion 2 occupies the outer periphery of the stator 1, and the shrink-fit part 7 becomes narrower.
- 7 is an area where the stator 1 and the frame 8 are fixed, that is, the contact area between the outer peripheral surface of the stator 1 and the inner peripheral surface of the frame 8 is small, and the fastening to the rotational force of the rotor cannot be effectively secured. There is a point.
- the stator fixing structure according to claim 1 of the present invention that solves the above problems is provided with a protruding portion that protrudes in the radial direction on the outer periphery of the stator formed by laminating a plurality of plate-like members, and is formed in the protruding portion.
- the fastening member is inserted into the fastening member insertion hole to fix the stator to the frame, and the outer peripheral surface of the stator excluding the projecting portion is shrink-fitted and fixed to the inner peripheral surface of the frame.
- a depression is formed at the base of the protruding portion.
- the stator fixing structure according to a second aspect of the present invention for solving the above-mentioned problems is that in the first aspect, the recess is formed from the end portion on the circumferential side of the protruding portion toward the circumferential center of the protruding portion.
- the inner peripheral side surface of the recess is formed by extending an outer peripheral edge of the stator.
- a stator fixing structure that solves the above-described problem is the stator fixing structure according to the first aspect, wherein the recess extends from a circumferential end of the protruding portion toward a radially inner side of the stator. It is a shape, The inner peripheral side surface of the said hollow is formed in the radial inside from the outer periphery of the said stator, It is characterized by the above-mentioned.
- a stator fixing structure according to a fourth aspect of the present invention for solving the above-mentioned problem is the stator fixing structure according to the first aspect, wherein the recess extends from an end portion on the circumferential direction side of the protruding portion toward an outer peripheral side of the protruding portion. It is a shape.
- the depression is provided at the base of the protrusion, the ratio of the protrusion on the outer periphery of the stator is reduced, and the contact area between the outer peripheral surface of the frame and the inner peripheral surface of the stator is increased.
- the force for fastening the stator to the frame can be increased.
- by providing the depression at the base of the protrusion deformation due to the tightening force of the stator can be suppressed. Further, there is no problem in manufacturing because it is not necessary to determine the fixing condition of the stator in consideration of the caulking force and the tight fixing force.
- the contact area between the inner peripheral surface of the frame and the outer peripheral surface of the stator is further increased. This increases the fastening force by shrink fitting.
- a hollow is a shape extended toward the inner peripheral side of a stator from the edge part of the circumferential direction side of a protrusion part, more space which absorbs clamping force is ensured. I can do it.
- a hollow is a shape extended toward the outer peripheral side of a protrusion part from the edge part of the circumferential direction side of a protrusion part, it can maintain the intensity
- a stator 1 formed by laminating a plurality of plate-like members (electromagnetic steel plates) is installed inside a frame 8 and inside the stator 1.
- the rotor 6 is arranged with a certain gap, and the shaft 5 that supports the rotor 6 passes through the frame 8 via a bearing 10 so as to freely rotate.
- a tooth portion 1 a around which the winding 9 is wound is formed on the inner peripheral side of the stator 1.
- a protruding portion 2 that protrudes in the radial direction is provided on the outer periphery of the stator 1.
- a fastening member (for example, a bolt or the like) 11 is inserted into the fastening member insertion hole 3 to fix the stator 1 to the frame 8, while the outer peripheral surface of the stator 1 is a portion of the outer periphery of the stator 1 excluding the protruding portion 2.
- the inner peripheral surface of the frame 8 is fixed by shrink fitting with a tightening margin.
- the contact portion between the outer peripheral surface of the stator 1 and the inner peripheral surface of the frame 8 thus fixed by shrink fitting is the shrink fitting portion 7.
- the stator fixing structure of the present invention uses both fastening by a fastening member as shown in FIG. 2 of the cited document 1 and fastening by shrink fitting as shown in FIG. 1 of the cited document 2.
- the stator fixing structure is particularly characterized in that a recess is provided at the base of the protrusion 2. That is, the base of the protruding portion 2 is recessed in the circumferential direction, and the base of the protruding portion 2 is narrowed.
- the stator 1 and the frame 8 are fixed as follows. (1) Warm the frame 8 to a predetermined temperature. (2) The stator 1 is inserted into the warmed frame 8 and fixed with the fastening member 11. (3) Cool the frame 8 and the stator 1.
- FIG. 3 shows a stator fixing structure according to Embodiment 1 of the present invention.
- a depression 4 is provided at both ends of the base of the protruding portion 2.
- the recess 4 has a shape extending from the end of the protrusion 2 on the circumferential direction side toward the center of the protrusion 2. Further, the inner peripheral surface of the recess 4 is formed along the outer periphery of the stator 1.
- the depression 4 provided in the protruding portion 2 eliminates the curved portion formed from the root of the protruding portion 2 of the stator 1 to the outer periphery of the stator other than the protruding portion.
- the ratio of the protrusion part 2 becomes small, and the part can be used as a tightening allowance for shrink fitting. Therefore, as shown in FIG. 3, the area of the shrink-fitted portion 7 is increased, and as shown in FIG. 3, the area that can be used for fastening allowance for fixing the frame 8 and the stator 1, in other words, The contact area with the inner peripheral surface is increased, and the force for fastening the stator 1 to the frame 8 can be increased. Moreover, when the fastening force by shrink fitting is too strong, the stress which generate
- the diameter of the inner peripheral surface of the recess 4 is the same as the diameter of the outer periphery of the stator excluding the protruding portion 2, the ratio of the protruding portion 2 on the outer periphery of the stator 1 can be further reduced, and the shrink-fit portion 7. As a result, the contact area between the inner peripheral surface of the frame 8 and the outer peripheral surface of the stator 1 is further increased, and the fastening force by shrink fitting is improved.
- the contact area between the inner peripheral surface of the frame 8 and the outer peripheral surface of the stator 1 is increased by the depression 4 provided in the protruding portion 2. Fastening force is improved. Further, the depression 4 of the protrusion 2 absorbs and disperses the tightening force from the frame 8, thereby producing an effect that the deformation of the stator 1 can be prevented.
- FIG. 4 shows a stator fixing structure according to Embodiment 2 of the present invention.
- a depression 4 a is provided at both ends of the base of the protrusion 2.
- the recess 4 a has a shape that extends from the circumferential end of the protrusion 2 toward the radially inner periphery of the stator 1. Furthermore, the inner peripheral surface of the recess 4 a is formed radially inward from the outer periphery of the stator 1.
- the depressions 4a are provided at both ends of the base of the projecting portion 2, the contact area between the outer peripheral surface of the frame 8 and the inner peripheral surface of the stator 1 in the same manner as in the first embodiment, in other words, the contact area between the inner peripheral surface of the frame 8 and the outer peripheral surface of the stator 1 is increased, and the effect of increasing the force for fastening the stator 1 to the frame 8 can be obtained. By absorbing and dispersing the generated stress, there is an effect that the deformation of the stator 1 can be prevented.
- the inner peripheral surface of the recess 4a is formed radially inward from the outer periphery of the stator 1, it is possible to ensure more space for absorbing the tightening force due to shrink fitting. Play.
- FIG. 5 shows a stator fixing structure according to Embodiment 3 of the present invention.
- a depression 4 b is provided at both ends of the base of the protrusion 2.
- the recess 4b has a shape that extends from the circumferential end of the protrusion 2 toward the outer periphery of the protrusion 2.
- the stator fixing structure of the present invention can be widely used industrially as a fixing structure using both fastening by a fastening member and shrink-fitting fixing.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
例えば、特許文献1においては、複数の板状部材(電磁鋼板)を積層してなるステータの外周部に径方向に突出する突出部を設けると共に、この突出部に形成された締結部材挿入孔に締結部材を挿入してフレーム(ベース部とも言う)にステータを固定し、上記突出部の根元両端(突出部の裾野の周方向端部)のステータに対向するフレーム内周面をステータ外周面に密着固定することで、複数の板状部材の隙間から固着材が突出部への浸入を防止することが、図4及び段落[0009]~[0014]に開示されている。
また、前記締結部材による締結方法に加え、フレームとステータの焼嵌め固定を併用する締結方法もある。この焼嵌め固定を併用する締結方法では、例えば引用文献1の図4のようなステータの径方向に突出した突出部を備える場合、ステータの突出部の根元にある裾野を拡大する方向の湾曲部とこの湾曲部に対向するフレームとの間は、寸法精度の問題等から焼嵌めの締め代に利用できず、一般的にステータの突出部の外周面とフレームの前記突出部に対向する内周面との間を接触させずに隙間を設けて固定する。
この締め付け力が大きすぎる場合、引用文献1の図4のような構造であれば、締め付け力の逃げ場が無いため、ステータ1の突出部2の根元に締め付けによる応力が集中しステータ1が変形してしまう等といった問題点がある。
なお、引用文献2の段落[0006]~[0007]は、金属フレームにステータを焼嵌め固定するに際し、カシメ部をステータ外周の金属フレームとの嵌め合いに近い場所に配置することで、かしめ固定した際にステータ外周部が径方向に膨らむことでフレームに密着固定してステータの変形を防止する構造が開示されているが、設計上であらかじめ定められているかしめ力と膨らみ量による密着固定力を適切に合わせる必要があり、かしめ力と密着固定力を同時に適切にすることは難しく、製造が容易ではないという問題がある。
また、かしめ力と密着固定力を考慮してステータの固定条件を決める必要が無いため、製造上の問題もない。
(1)フレーム8を所定の温度まで暖める。
(2)暖めたフレーム8にステータ1を挿入し、締結部材11で固定する。
(3)フレーム8とステータ1を冷却する。
窪み4は、突出部2の周方向側の端部から、突出部2の中心に向かって延びる形状である。さらに、窪み4の内周側の面は、ステータ1の外周に沿って形成されている。
本実施例によれば、突出部2に設けた窪み4により、ステータ1の突出部2の根元から突出部以外のステータの外周に渡って形成される湾曲部が無くなったため、ステータ1の外周における突出部2の割合が小さくなり、その分は焼嵌めの締め代として利用できる。よって、焼嵌め部7が増えて、図3に示すように、焼嵌め部7によるフレーム8とステータ1とを固定する締め代に利用できる面積、言い換えると、フレーム8の外周面とステータ1の内周面との接触面積が増加し、ステータ1をフレーム8に締結する力を増すことが出来る。
また、焼嵌めによる締結力が強すぎる場合、締め付け時に発生する応力が焼嵌め部以外の部分(突出部2)に逃げる。突出部2の根元に窪み4を設けたことにより、焼嵌めによる締結力が強すぎる場合、締め付け力の逃げ場となってステータ1にかかる締め付け力を吸収および分散することができるので、ステータ1の締め付け力による変形を抑制することができる。
窪み4aは、突出部2の周方向側の端部からステータ1の径方向内周側に向かって延びる形状である。さらに、窪み4aの内周側の面は、ステータ1の外周より径方向内側に形成される。
窪み4bは、突出部2の周方向側の端部から、突出部2の外周側に向かって延びる形状である。
2 突出部
3 締結部材挿入孔
4,4a,4b 窪み
5 シャフト
6 ロータ
7 焼嵌め部
8 フレーム
9 巻線
10 軸受
11 締結部材
Claims (4)
- 複数の板状部材を積層してなるステータの外周に径方向に突出する突出部を設けると共に前記突出部に形成された締結部材挿入孔に締結部材を挿入して前記ステータをフレームに固定し、前記突出部を除く前記ステータの外周面が、前記フレームの内周面と焼嵌め固定されているステータの固定構造において、前記突出部の根元に窪みを形成したことを特徴とするステータの固定構造。
- 前記窪みは、前記突出部の周方向側の端部から、前記突出部の周方向中心に向かって延びる形状であり、前記窪みの内周側面は、前記ステータの外周の縁辺を延長して形成されていることを特徴とする請求項1記載のステータの固定構造。
- 前記窪みは、前記突出部の周方向側の端部から、前記ステータの径方向内側に向かって延びる形状であり、前記窪みの内周側面は、前記ステータの外周より径方向内側に形成されることを特徴とする請求項1記載のステータの固定構造。
- 前記窪みは、前記突出部の周方向側の端部から、前記突出部の外周側に向かって延びる形状であることを特徴とする請求項1記載のステータの固定構造。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380049556.3A CN104662775B (zh) | 2012-09-18 | 2013-09-18 | 定子的固定构造 |
JP2014536864A JP5974213B2 (ja) | 2012-09-18 | 2013-09-18 | ステータの固定構造 |
US14/428,793 US10770933B2 (en) | 2012-09-18 | 2013-09-18 | Stator fixing structure |
EP13838915.0A EP2899849B1 (en) | 2012-09-18 | 2013-09-18 | Stator fixing structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2012203881 | 2012-09-18 | ||
JP2012-203881 | 2012-09-18 |
Publications (1)
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WO2014046101A1 true WO2014046101A1 (ja) | 2014-03-27 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2013/075072 WO2014046101A1 (ja) | 2012-09-18 | 2013-09-18 | ステータの固定構造 |
Country Status (5)
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US (1) | US10770933B2 (ja) |
EP (1) | EP2899849B1 (ja) |
JP (1) | JP5974213B2 (ja) |
CN (1) | CN104662775B (ja) |
WO (1) | WO2014046101A1 (ja) |
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JP4775020B2 (ja) | 2006-02-14 | 2011-09-21 | トヨタ自動車株式会社 | ステータの固定構造および電動車両 |
JP2009201235A (ja) * | 2008-02-21 | 2009-09-03 | Jfe Steel Corp | 電動機固定子の固定方法 |
JP2011217434A (ja) * | 2010-03-31 | 2011-10-27 | Honda Motor Co Ltd | 電動機 |
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DE102014216743A1 (de) * | 2014-08-22 | 2016-02-25 | Robert Bosch Gmbh | Elektrische Maschine |
DE102014216743B4 (de) * | 2014-08-22 | 2021-03-18 | Robert Bosch Gmbh | Elektrische Maschine |
JP2020022394A (ja) * | 2018-08-07 | 2020-02-13 | 株式会社マキタ | 電動作業機 |
JP2020054173A (ja) * | 2018-09-28 | 2020-04-02 | 日本電産サーボ株式会社 | モータ |
DE102019218695A1 (de) * | 2019-12-02 | 2021-06-02 | Robert Bosch Gmbh | Elektrische Maschine und Verfahren zur Montage eines Stators einer elektrischen Maschine in einem Gehäuse |
WO2022107373A1 (ja) * | 2020-11-19 | 2022-05-27 | 日本電産株式会社 | ステータ、回転電機、および駆動装置 |
DE112022004090T5 (de) | 2021-08-25 | 2024-05-29 | Nidec Corporation | Elektrische drehmaschine |
DE112022004243T5 (de) | 2021-09-01 | 2024-07-04 | Nidec Corporation | Drehmotor |
DE112022004202T5 (de) | 2021-09-01 | 2024-07-18 | Nidec Corporation | Drehmotor |
Also Published As
Publication number | Publication date |
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CN104662775A (zh) | 2015-05-27 |
EP2899849A4 (en) | 2016-05-25 |
US20150249368A1 (en) | 2015-09-03 |
CN104662775B (zh) | 2018-07-10 |
EP2899849A1 (en) | 2015-07-29 |
EP2899849B1 (en) | 2017-12-20 |
JPWO2014046101A1 (ja) | 2016-08-18 |
US10770933B2 (en) | 2020-09-08 |
JP5974213B2 (ja) | 2016-08-23 |
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