JP4894375B2 - Electric pump - Google Patents

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JP4894375B2
JP4894375B2 JP2006178935A JP2006178935A JP4894375B2 JP 4894375 B2 JP4894375 B2 JP 4894375B2 JP 2006178935 A JP2006178935 A JP 2006178935A JP 2006178935 A JP2006178935 A JP 2006178935A JP 4894375 B2 JP4894375 B2 JP 4894375B2
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rotor
annular
permanent magnet
molding
core
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JP2008008187A (en
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昌吾 岩瀬
充 寺山
幹久 石黒
高範 野田
好章 中野
匡 樋口
博臣 小川
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Aisin Corp
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Aisin Seiki Co Ltd
Aisin Corp
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Description

本発明は、電動ウォータポンプ等の電動ポンプに関する。   The present invention relates to an electric pump such as an electric water pump.

公知のポンプ装置が後述の特許文献１に記載されている。これは、回転磁界を生成するためのコイルを備えた固定子と、永久磁石及びヨーク（コア）が主軸に保持されて成るロータと、ロータの主軸を回転自在に支持するケーシングとを備えている。ロータは、コイルが生成する回転磁界から力を受けて流体中で回転する。ロータにおいて、ヨーク（コア）は圧入等の手段を用いて主軸に固定され、永久磁石は、主軸に固定されたヨーク（コア）の外周に接着等の手段を用いて取り付けられている。さらに、ヨーク（コア）と主軸との固定部分に密接するように、ゴム等からなるＯリングが取り付けられ、このＯリング、ヨーク（コア）及び永久磁石を覆うように、熱可塑性プラスチック等からなる樹脂材が樹脂成形されている。これにより、ロータにおける永久磁石が、ロータ周囲の流体に対してシールされている。
特開２００３−２５９５７８号公報 A known pump device is described in Patent Document 1 described later. This includes a stator having a coil for generating a rotating magnetic field, a rotor in which a permanent magnet and a yoke (core) are held by a main shaft, and a casing that rotatably supports the main shaft of the rotor. . The rotor rotates in the fluid by receiving a force from the rotating magnetic field generated by the coil. In the rotor, the yoke (core) is fixed to the main shaft using a means such as press fitting, and the permanent magnet is attached to the outer periphery of the yoke (core) fixed to the main shaft using a means such as adhesion. Further, an O-ring made of rubber or the like is attached so as to be in close contact with a fixed portion between the yoke (core) and the main shaft, and the O-ring, the yoke (core) and the permanent magnet are covered with a thermoplastic plastic or the like. The resin material is resin molded. Thereby, the permanent magnet in the rotor is sealed against the fluid around the rotor.
JP 2003-259578 A

上述のポンプ装置において、永久磁石は、Ｏリング及び樹脂材によって覆われている。Ｏリングと樹脂材とは異なった材質からできているので、Ｏリングの熱膨張率と樹脂材の熱膨張率との間には差がある。このため、ポンプの使用条件によっては、ロータの温度上昇によってＯリングと樹脂材との間に隙間が生じ、この隙間を通って流体が永久磁石に到達し得る。流体が永久磁石に到達すると、永久磁石が流体と反応して腐食する可能性がある。   In the pump device described above, the permanent magnet is covered with an O-ring and a resin material. Since the O-ring and the resin material are made of different materials, there is a difference between the thermal expansion coefficient of the O-ring and the thermal expansion coefficient of the resin material. For this reason, depending on the conditions of use of the pump, a gap may be formed between the O-ring and the resin material due to the temperature rise of the rotor, and the fluid may reach the permanent magnet through this gap. When the fluid reaches the permanent magnet, the permanent magnet may react with the fluid and corrode.

よって、本発明は上記の問題点に鑑みてなされたものであり、ロータの永久磁石またはコアをより確実にシールできる電動ポンプ装置を提供することを課題とする。   Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an electric pump device that can seal the permanent magnet or core of the rotor more reliably.

上記課題を解決するために、本発明にて講じた技術的手段は、請求項１に記載の様に、周方向に並んだ複数のティースとそれぞれの前記ティースに巻回された複数のコイルとを有する筒状のステータと、前記ステータの内部に収容されるとともに永久磁石及びコアを保持する駆動部と作動流体を圧送するインペラ部とを有し前記駆動部にて発生する回転駆動力により前記作動流体中にて回転するロータと、前記ロータを回転自在に支持するハウジングと、を備える電動ポンプにおいて、前記ロータの駆動部は、樹脂成形により形成され、前記永久磁石と前記コアとを固定する一次成形部と、樹脂成形により形成され、前記一次成形部に接合されるとともに前記永久磁石および前記コアを密封する二次成形部とが設けられ、前記一次成形部における前記二次成形部との接合部には、環状を呈するとともに前記二次成形部に向かって突出する複数の環状突起が設けられ、前記複数の環状突起のうちの第１の環状突起は、第２の環状突起を囲むように形成され、前記二次成形部は前記ロータの軸方向両端の端面に半球状に凹んだ軸受け面を形成しており、前記ロータの両端と前記ハウジングとの軸方向の間には、球軸受けが配置される構成としたことである。 In order to solve the above-mentioned problem, the technical means taken in the present invention includes a plurality of teeth arranged in a circumferential direction and a plurality of coils wound around each of the teeth, as described in claim 1. A cylindrical stator, a drive unit that is housed in the stator and holds a permanent magnet and a core, and an impeller unit that pumps a working fluid, and the rotational drive force generated by the drive unit In an electric pump including a rotor that rotates in a working fluid and a housing that rotatably supports the rotor, a drive unit of the rotor is formed by resin molding, and fixes the permanent magnet and the core. A primary molding part and a secondary molding part formed by resin molding and joined to the primary molding part and sealing the permanent magnet and the core are provided, and the primary molding part is provided. The joint portion with the secondary molded portion is provided with a plurality of annular projections that exhibit an annular shape and project toward the secondary molded portion, and the first annular projection of the plurality of annular projections, The secondary molded part is formed so as to surround a second annular protrusion, and has a hemispherical recessed bearing surface on the end surface of both ends in the axial direction of the rotor, and the shaft between both ends of the rotor and the housing In other words, a ball bearing is arranged between the directions .

好ましくは、請求項２に記載の様に、環状突起は円環状であり一次成形部が形成されたロータの軸方向両端の端面にそれぞれ複数個形成されると良い。   Preferably, as described in claim 2, the annular protrusions are annular, and a plurality of annular protrusions may be formed on both end faces in the axial direction of the rotor on which the primary molded portions are formed.

好ましくは、請求項３に記載の様に、複数の環状突起のうち少なくとも１つは他の環状突起と大きさが異なると良い。   Preferably, as described in claim 3, at least one of the plurality of annular protrusions may be different in size from the other annular protrusions.

好ましくは、請求項４に記載の様に、二次成形部はインペラ部を一体に形成しており、駆動部の外周面には、ロータの軸方向に向かって延びるスキュー溝が形成されると良い。   Preferably, as described in claim 4, the secondary molded part integrally forms the impeller part, and a skew groove extending in the axial direction of the rotor is formed on the outer peripheral surface of the drive part. good.

本発明によれば、永久磁石及びコアを保持するロータの駆動部には、永久磁石及びコアを固定するために樹脂成形により形成される一次成形部と、永久磁石及びコアを覆うべく一次成形部に接合され、樹脂成形により形成される二次成形部とが設けられる。さらに、一次成形部における二次成形部との接合部には、二次成形部に向かって突出する複数の環状突起が設けられる。この構造によれば、二次成形部が形成される工程において、二次成形部の樹脂成形に発生する熱及び圧力が環状突起の先端部分とその近傍に集中する。これにより、二次成形部が一次成形部に接合される場合に、一次成形部の環状突起が二次成形部との境界部分で溶融し、凝固し、全周にわたり接合が行われ、永久磁石及びコアが一次成形部と二次成形部によって確実に密封され外部とのシールが確立される。   According to the present invention, the drive part of the rotor that holds the permanent magnet and the core includes a primary molded part that is formed by resin molding to fix the permanent magnet and the core, and a primary molded part that covers the permanent magnet and the core. And a secondary molded part formed by resin molding. Furthermore, a plurality of annular protrusions that protrude toward the secondary molding portion are provided at a joint portion of the primary molding portion with the secondary molding portion. According to this structure, in the step of forming the secondary molded portion, heat and pressure generated in resin molding of the secondary molded portion are concentrated on the tip portion of the annular protrusion and its vicinity. As a result, when the secondary molded part is joined to the primary molded part, the annular projection of the primary molded part melts at the boundary with the secondary molded part, solidifies, and is joined over the entire circumference. And the core is securely sealed by the primary molding part and the secondary molding part, and a seal with the outside is established.

さらに、二次成形時の熱及び圧力または冷却が、或る１つの環状突起の接合箇所に気泡を発生させてしまいシールが完全にできない場合であっても、複数の円環状突起が存在することから、他の環状突起の接合箇所の二次成形部の樹脂成形に発生する熱、圧力および冷却の状態は、環状突起が配置される位置等の条件により先出の環状突起の接合箇所の状態、条件と異なるため、他の環状突起の接合箇所では気泡の発生がなくなり、密封、シールが出来ることとなる。つまり、複数の環状突起を設けることで、単に接合箇所の数の増加でシールの信頼性を増すのではなく、環状突起の配置位置の違いから生じる樹脂成形の加工条件変化を加味することで、或る一つの第１の環状突起の接合箇所では気泡が発生しても、他の第２の環状突起の接合箇所では気泡の発生がなくなり、樹脂成形によるシールの信頼性を格段に向上することができる。結果として、ロータ内の永久磁石およびコアを作動流体から隔離し、永久磁石、コアの腐食を防止することができる。   Furthermore, even when heat and pressure or cooling at the time of secondary molding generate bubbles at a joint portion of a certain annular protrusion and sealing cannot be performed completely, a plurality of annular protrusions are present. From the state of heat, pressure, and cooling generated in the resin molding of the secondary molded portion at the joint portion of the other annular protrusion, the state of the joint portion of the previous annular protrusion depending on the conditions such as the position where the annular protrusion is disposed Since the conditions are different from each other, no bubbles are generated at the joint portion of the other annular protrusion, and sealing and sealing can be performed. In other words, by providing a plurality of annular protrusions, it does not simply increase the reliability of the seal by increasing the number of joints, but by taking into account changes in the resin molding processing conditions resulting from the difference in the position of the annular protrusions, Even if a bubble is generated at a joint portion of a certain first annular protrusion, no bubble is generated at a joint portion of another second annular protrusion, and the reliability of sealing by resin molding is greatly improved. Can do. As a result, the permanent magnet and the core in the rotor can be isolated from the working fluid, and corrosion of the permanent magnet and the core can be prevented.

また、一次成形部と二次成形部に同じ材質を用いれば、一次成形部と二次成形部との熱膨張率の差に起因するシール不良の問題は生じない。   In addition, if the same material is used for the primary molded part and the secondary molded part, the problem of poor sealing due to the difference in the thermal expansion coefficient between the primary molded part and the secondary molded part does not occur.

以上の様に、本発明の電動ポンプ装置によれば、ロータの永久磁石を、ロータ周囲の流体に対しより確実にシールできる。   As described above, according to the electric pump device of the present invention, the permanent magnet of the rotor can be more reliably sealed against the fluid around the rotor.

以下、本発明を実施するための最良の形態を、ウォータポンプの例を用いて、図面を基に説明する。なお、本発明はウォータポンプに限られるものではない。   Hereinafter, the best mode for carrying out the present invention will be described based on the drawings using an example of a water pump. The present invention is not limited to the water pump.

図１は、本発明に係るウォータポンプ１の構造を示す図である。ウォータポンプ１（電動ポンプ）において、筒状の形状を呈すステータ２は、周方向に並んだ複数のティース２ｃを有しており、それぞれのティース２ｃに回転磁界を生じさせるためのコイル２ａが巻回される。ステータ２が生じさせる回転磁界は、ドライバ（制御装置）２ｂによって制御される。ロータ３には、駆動部３ａと、インペラ部３ｂとが設けられている。駆動部３ａは、ステータ２の内部に収容され、永久磁石３ｃ及びコア３ｄを保持する。インペラ部３ｂは、水（作動流体）を圧送するための部位であり複数のインペラ３ｅにより水を攪拌する。ロータ３において、駆動部３ａとインペラ部３ｂとは、樹脂成形によって一体に形成される。ハウジング４は、ロータ３を収容し、ロータ３の回転軸を成すシャフト５の一端及び他端を支持する。ハウジング４には、作動流体を吸入するための吸入口４ａと、作動流体を吐出するための吐出口４ｂとが設けられている。   FIG. 1 is a view showing the structure of a water pump 1 according to the present invention. In the water pump 1 (electric pump), a stator 2 having a cylindrical shape has a plurality of teeth 2c arranged in the circumferential direction, and a coil 2a for generating a rotating magnetic field is wound around each tooth 2c. Turned. The rotating magnetic field generated by the stator 2 is controlled by a driver (control device) 2b. The rotor 3 is provided with a drive unit 3a and an impeller unit 3b. The drive unit 3a is housed inside the stator 2 and holds the permanent magnet 3c and the core 3d. The impeller part 3b is a part for pumping water (working fluid), and stirs the water with a plurality of impellers 3e. In the rotor 3, the drive part 3a and the impeller part 3b are integrally formed by resin molding. The housing 4 accommodates the rotor 3 and supports one end and the other end of the shaft 5 that forms the rotation axis of the rotor 3. The housing 4 is provided with a suction port 4a for sucking the working fluid and a discharge port 4b for discharging the working fluid.

ドライバ（制御装置）２ｂによってステータ２に回転磁界が生じると、ロータ３は、駆動部４にて回転磁界から力を受けて、シャフト５を中心に作動流体中で回転する。これにより、ハウジング４の吸入口４ａから吸入された作動流体がロータ３のインペラ部３ｂによって圧送され、ハウジング４の吐出口４ｂから吐出される。   When a rotating magnetic field is generated in the stator 2 by the driver (control device) 2b, the rotor 3 receives a force from the rotating magnetic field in the driving unit 4 and rotates in the working fluid around the shaft 5. As a result, the working fluid sucked from the suction port 4 a of the housing 4 is pumped by the impeller portion 3 b of the rotor 3 and discharged from the discharge port 4 b of the housing 4.

次に、本発明のウォータポンプ１におけるロータ３の樹脂成形の態様を、図２乃至図４を参照して説明する。   Next, an embodiment of resin molding of the rotor 3 in the water pump 1 of the present invention will be described with reference to FIGS.

図２は、ロータ３の一次成形部１０を示す図である。一次成形部１０は、永久磁石３ｃと、コア３ｄと、永久磁石３ｃ及びコア３ｄの外周部を覆うように成形された樹脂部１１からなる。樹脂部１１には、長手方向（図２示左右方向）の両端の接合部１０ａに、環状である円環状に延在する先細り形状を呈する複数の環状突起１２、１３、１４及び１５が突出して形成され、それぞれ端面に複数の外周側環状突起（第１の環状突起）１２、１４と、これらよりも内周側に位置する複数の内周側環状突起１３、１５（第２の環状突起）が設けられる。つまり、外周側環状突起（第１の環状突起）１２、１４は、内周側環状突起（第２の環状突起）を囲んで形成される、
図３は、一次成形部１０に二次成形部２０が溶着された状態を示す図、図４は、図３におけるＡ示部分の拡大図である。二次成形部２０は、一次成形部１０の内径側から一次成形部１０を覆うように成形されるとともに、長手方向の端部に一体形成されたインペラ部３ｂが設けられた樹脂部２１からなる。樹脂部２１は樹脂部１１と同じ材質からなる。 FIG. 2 is a view showing the primary forming portion 10 of the rotor 3. The primary molding part 10 consists of the permanent magnet 3c, the core 3d, and the resin part 11 molded so as to cover the outer periphery of the permanent magnet 3c and the core 3d. The resin portion 11 has a plurality of annular protrusions 12, 13, 14, and 15 projecting in a circular shape that extends in an annular shape at the joint portions 10 a at both ends in the longitudinal direction (the left-right direction in FIG. 2). A plurality of outer annular projections (first annular projections) 12 and 14 formed on the respective end faces, and a plurality of inner circumferential projections 13 and 15 (second annular projections) located on the inner circumferential side of these. Is provided. That is, the outer circumferential side annular projections (first annular projections) 12 and 14 are formed surrounding the inner circumferential side annular projection (second annular projection).
3 is a view showing a state where the secondary molded portion 20 is welded to the primary molded portion 10, and FIG. 4 is an enlarged view of a portion indicated by A in FIG. The secondary molded part 20 is formed from the inner diameter side of the primary molded part 10 so as to cover the primary molded part 10 and is composed of a resin part 21 provided with an impeller part 3b integrally formed at an end in the longitudinal direction. . The resin part 21 is made of the same material as the resin part 11.

一次成形部１０に二次成形部２０が溶着される時、その断面において先端になるに従って先細り形状を呈す環状突起１２〜１５の先端部とその近傍に、二次成形部２０の樹脂成形に係る熱及び圧力が集中し、一次成形部１０の環状突起１２〜１５が、二次成形部２０との境界部分のうち先端部とその近傍で溶解する。環状突起１２〜１５の溶解後の冷却により樹脂が固まり、一次成形部１０と二次成形部２０とが確実に溶着され、永久磁石３ｃ及びコア３ｄが一次成形部１０と二次成形部２０によって確実に覆われ、密封され、永久磁石３ｃ及びコア３ｄが完全にシールされる。ここで例えば、二次成形部２０の樹脂成形時に、熱や圧力の影響により外側環状突起１２、１４に気泡が発生してしまい外側環状突起１２、１４のみでは完全シールが出来ない場合であっても、一次成形部１０の両端の外側環状突起１２、１４よりも内周側に位置する内周側環状突起１３、１５の加工条件は外側環状突起１２、１４に対する条件と異なるため気泡の発生がないことが十分期待できる。これにより、完全シールの信頼性を向上することができる。   When the secondary molding part 20 is welded to the primary molding part 10, the secondary molding part 20 is related to resin molding at the tip part of the annular projections 12 to 15 that show a tapered shape in the cross section and in the vicinity thereof. Heat and pressure are concentrated, and the annular protrusions 12 to 15 of the primary molding portion 10 are melted at the tip portion and the vicinity thereof in the boundary portion with the secondary molding portion 20. The resin is hardened by cooling after the annular protrusions 12 to 15 are melted, the primary molded portion 10 and the secondary molded portion 20 are surely welded, and the permanent magnet 3 c and the core 3 d are formed by the primary molded portion 10 and the secondary molded portion 20. It is reliably covered and sealed, and the permanent magnet 3c and the core 3d are completely sealed. Here, for example, during resin molding of the secondary molded part 20, bubbles are generated in the outer annular projections 12 and 14 due to the influence of heat and pressure, and a complete seal cannot be achieved with only the outer annular projections 12 and 14. However, since the processing conditions of the inner annular projections 13 and 15 located on the inner circumferential side of the outer annular projections 12 and 14 at both ends of the primary molding portion 10 are different from the conditions for the outer annular projections 12 and 14, bubbles are generated. It can be expected that there is not enough. Thereby, the reliability of a complete seal can be improved.

図５および図６に、別の実施形態を示す。図５では外周側環状突起１２、１４を内周側環状突起１３、１５に比べて大きく、図６では内周側環状突起１３、１５にを外周側環状突起１２、１４に比べて大きく設定することで、外周側環状突起１２、１４と内周側環状突起１３、１５との間に樹脂成形時に生じる、熱、圧力および冷却速度等の条件差を積極的に大きくし、気泡等によるシール不良の可能性を低減することもできる。   5 and 6 show another embodiment. In FIG. 5, the outer peripheral annular protrusions 12 and 14 are set larger than the inner peripheral annular protrusions 13 and 15, and in FIG. 6, the inner peripheral annular protrusions 13 and 15 are set larger than the outer peripheral annular protrusions 12 and 14. Therefore, the difference in conditions such as heat, pressure, and cooling rate generated during resin molding between the outer circumferential annular projections 12 and 14 and the inner circumferential annular projections 13 and 15 is positively increased, resulting in poor sealing due to bubbles or the like. It is also possible to reduce the possibility of

また、以上に述べた構成のロータ３においては、一次成形部１０と二次成形部２０とが同じ材質からなるので、熱膨張率の差に起因する問題は生じない。   Further, in the rotor 3 having the above-described configuration, the primary molded portion 10 and the secondary molded portion 20 are made of the same material, and therefore no problem due to the difference in thermal expansion coefficient occurs.

なお、図７に示す様に、ロータ３の駆動部３ａの外周面には、ロータ３の軸方向に沿って一端に向かって延びるスキュー溝２５が樹脂成形により形成されていると好ましい。スキュー溝２５が設けられていると、水（作動流体）は、ロータ３の回転にともなって、ロータ３の一端、すなわちハウジング４におけるロータ３の支持部分に送られるので、この支持部分が作動流体によって効率よく潤滑される。なお、このスキュー溝２５を設ける方式は、駆動部３ａがプラマグ一体成形により成形されるロータにも適用できる。   As shown in FIG. 7, it is preferable that a skew groove 25 extending toward one end along the axial direction of the rotor 3 is formed on the outer peripheral surface of the drive unit 3a of the rotor 3 by resin molding. When the skew groove 25 is provided, water (working fluid) is sent to one end of the rotor 3, that is, the support portion of the rotor 3 in the housing 4 as the rotor 3 rotates, so that the support portion serves as the working fluid. Is efficiently lubricated. The method of providing the skew groove 25 can also be applied to a rotor in which the driving unit 3a is formed by integral plastic magnet.

なお、図８に示す様に、二次成形時にロータ３の軸方向両端に端面に半球状に凹んだ軸受け面３ｆ、３ｇを形成し、ロータ３とハウジング４との間には、ロータ６の長手方向に関して対向し、ロータ３を回転、摺動自在に支持すべく駆動部３ａ及びインペラ３ｂの端面に摺接する一対の球面部をもつ球面軸受け３０、３１が設けられていると好ましい。ロータ３を球面軸受け３０及び３１によって支持することにより、精度が必要なシャフト５を用いる必要がなくなり、ロータ３の設計を簡素化できる。また、シャフト５を用いることによって引き起こされていた軸ずれが減少し、ロータ３が振動しにくくなる。また、シャフト５を用いないので、ロータ３を小型化することも可能となる。   As shown in FIG. 8, bearing surfaces 3 f and 3 g that are hemispherically recessed at the end faces are formed at both ends in the axial direction of the rotor 3 during the secondary molding, and between the rotor 3 and the housing 4, It is preferable that spherical bearings 30 and 31 having a pair of spherical portions that are opposed to each other in the longitudinal direction and that are in sliding contact with the end surfaces of the drive portion 3a and the impeller 3b to support the rotor 3 so as to be rotatable and slidable are provided. By supporting the rotor 3 by the spherical bearings 30 and 31, it is not necessary to use the shaft 5 that requires accuracy, and the design of the rotor 3 can be simplified. Further, the axial deviation caused by using the shaft 5 is reduced, and the rotor 3 is less likely to vibrate. Further, since the shaft 5 is not used, the rotor 3 can be downsized.

本発明に係るウォータポンプ１の構造を示す図。The figure which shows the structure of the water pump 1 which concerns on this invention. ロータ３の一次成形部１０を示す図。The figure which shows the primary shaping | molding part 10 of the rotor 3. FIG. 一次成形部１０に二次成形部２０が溶着された状態を示す図。The figure which shows the state by which the secondary molding part 20 was welded to the primary molding part 10. FIG. 図３におけるＡ示部分の拡大図。FIG. 4 is an enlarged view of a portion indicated by A in FIG. 3. 別の実施例の環状突起を示す図The figure which shows the cyclic | annular protrusion of another Example 別の実施例の環状突起を示す図The figure which shows the cyclic | annular protrusion of another Example スキュー溝２５が設けられるロータ３の図。The figure of the rotor 3 in which the skew groove | channel 25 is provided. 球面部３０及び３１で支持されるロータ３の図。The figure of the rotor 3 supported by the spherical surface parts 30 and 31. FIG.

符号の説明Explanation of symbols

１ ウォータポンプ
２ ステータ
２ａ コイル
３ ロータ
３ａ 駆動部
３ｂ インペラ部
３ｃ 永久磁石
３ｄ コア
４ ハウジング
１０ 一次成形部
１２ 突起部
１３ 突起部
１４ 突起部
１５ 突起部
２０ 二次成形部
２５ スキュー溝
３０ 球面軸受け
３１ 球面軸受け DESCRIPTION OF SYMBOLS 1 Water pump 2 Stator 2a Coil 3 Rotor 3a Drive part 3b Impeller part 3c Permanent magnet 3d Core 4 Housing 10 Primary molding part 12 Projection part 13 Projection part 14 Projection part 15 Projection part 20 Secondary molding part 25 Skew groove 30 Spherical bearing 31 Spherical bearing

Claims (4)

周方向に並んだ複数のティースとそれぞれの前記ティースに巻回された複数のコイルとを有する筒状のステータと、
前記ステータの内部に収容されるとともに永久磁石及びコアを保持する駆動部と作動流体を圧送するインペラ部とを有し前記駆動部にて発生する回転駆動力により前記作動流体中にて回転するロータと、
前記ロータを回転自在に支持するハウジングと、
を備える電動ポンプにおいて、
前記ロータの駆動部は、樹脂成形により形成され、前記永久磁石と前記コアとを固定する一次成形部と、樹脂成形により形成され、前記一次成形部に接合されるとともに前記永久磁石および前記コアを密封する二次成形部とが設けられ、
前記一次成形部における前記二次成形部との接合部には、環状を呈するとともに前記二次成形部に向かって突出する複数の環状突起が設けられ、
前記複数の環状突起のうちの第１の環状突起は、第２の環状突起を囲むように形成され、
前記二次成形部は前記ロータの軸方向両端の端面に半球状に凹んだ軸受け面を形成しており、
前記ロータの両端と前記ハウジングとの軸方向の間には、球軸受けが配置されることを特徴とする電動ポンプ装置。 A cylindrical stator having a plurality of teeth arranged in the circumferential direction and a plurality of coils wound around each of the teeth;
A rotor housed in the stator and having a driving part for holding a permanent magnet and a core and an impeller part for pumping the working fluid, and rotating in the working fluid by a rotational driving force generated by the driving part When,
A housing that rotatably supports the rotor;
In an electric pump comprising:
The drive part of the rotor is formed by resin molding, a primary molding part that fixes the permanent magnet and the core, and is formed by resin molding and joined to the primary molding part and the permanent magnet and the core A secondary molding part for sealing is provided,
The joint portion of the primary molding portion with the secondary molding portion is provided with a plurality of annular protrusions that exhibit an annular shape and project toward the secondary molding portion,
A first annular protrusion of the plurality of annular protrusions is formed to surround the second annular protrusion ,
The secondary molded part is formed with a hemispherically recessed bearing surface on both end surfaces of the rotor in the axial direction,
A ball bearing is disposed between the two ends of the rotor and the axial direction of the housing . 前記環状突起は円環状であるとともに前記一次成形部が形成された前記ロータの軸方向両端の端面にそれぞれ複数個形成されることを特徴とする請求項１に記載の電動ポンプ。   2. The electric pump according to claim 1, wherein a plurality of the annular protrusions are formed on end faces of both ends in the axial direction of the rotor in which the primary molded portion is formed while being annular. 複数の前記環状突起のうち少なくとも１つは他の前記環状突起と大きさが異なることを特徴とする請求項２に記載の電動ポンプ。   The electric pump according to claim 2, wherein at least one of the plurality of annular protrusions is different in size from the other annular protrusions. 前記二次成形部は前記インペラ部を一体に形成しており、
前記駆動部の外周面には、前記ロータの軸方向に向かって延びるスキュー溝が形成されることを特徴する請求項１乃至３のいずれか一に記載の電動ポンプ。 The secondary molding part integrally forms the impeller part,
The electric pump according to any one of claims 1 to 3, wherein a skew groove extending in an axial direction of the rotor is formed on an outer peripheral surface of the drive unit.
JP2006178935A 2006-06-29 2006-06-29 Electric pump Expired - Fee Related JP4894375B2 (en)

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RU2013143157A (en) * 2011-02-24 2015-03-27 Андриц Риц Гмбх SYNCHRONOUS MOTOR WITH INTERNAL EXCITATION WITH MULTIPLE PROTECTED FROM CORROSION BY A ROTOR WITH PERMANENT MAGNETS
EP2933493B1 (en) 2012-12-12 2021-10-06 Hanyu Group Joint-Stock Co., Ltd. Ac permanent-magnet drain pump
CN104854349B (en) * 2012-12-12 2017-07-28 江门市地尔汉宇电器股份有限公司 AC permanent-magnet draining pump
KR200478380Y1 (en) * 2013-08-29 2015-09-25 갑을메탈 주식회사 Fan have preventing releasing of permanent magnet in the vehicle

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JP2005299528A (en) * 2004-04-13 2005-10-27 Asmo Co Ltd Canned motor pump and method of manufacturing the same
JP2006002654A (en) * 2004-06-17 2006-01-05 Ogihara Seisakusho:Kk Cylinder-like magnet type pump

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022117105A1 (en) 2021-07-12 2023-01-12 Nidec Tosok Corporation PUMP

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