JP6142288B2 - Electric blower and electric vacuum cleaner using the same - Google Patents

Electric blower and electric vacuum cleaner using the same Download PDF

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JP6142288B2
JP6142288B2 JP2013186904A JP2013186904A JP6142288B2 JP 6142288 B2 JP6142288 B2 JP 6142288B2 JP 2013186904 A JP2013186904 A JP 2013186904A JP 2013186904 A JP2013186904 A JP 2013186904A JP 6142288 B2 JP6142288 B2 JP 6142288B2
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fan
sealing material
electric blower
annular
notch
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JP2015055156A (en
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樽谷　隆夫
隆夫 樽谷
西村　剛
剛 西村
徳田　剛
剛 徳田
哲平 秀熊
哲平 秀熊
笹尾　雅規
雅規 笹尾
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Panasonic Intellectual Property Management Co Ltd
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Description

本発明は、電動送風機及びそれを備えた電気掃除機に関するものである。   The present invention relates to an electric blower and a vacuum cleaner including the same.

従来の電気掃除機用の電動送風機は、ファンとファンケースとの間に隙間が形成されるため、ファンの吐出口から吐出された気流の一部がファンとファンケースとの隙間を通って吸気口へと流れ、ファン内部と隙間とを流れる循環流が生じるため、送風効率が低下する欠点があった。   In conventional electric blowers for electric vacuum cleaners, a gap is formed between the fan and the fan case. Therefore, a part of the airflow discharged from the fan outlet is sucked through the gap between the fan and the fan case. Since a circulation flow that flows to the mouth and between the fan and the gap is generated, there is a disadvantage that the air blowing efficiency is lowered.

そこで、この循環流を防止するために、ファンケースの吸気口の周囲にゲル状のシール材を配設し、シール材にファンを当接させる技術が提案されている(例えば、特許文献１参照)。又、環状のシール材を環状の支持体にて固定しファンケースと固着する構成も提案されている（例えば、特許文献２参照）。   Therefore, in order to prevent this circulation flow, a technique has been proposed in which a gel-like sealing material is disposed around the air inlet of the fan case and the fan is brought into contact with the sealing material (see, for example, Patent Document 1). ). Further, a configuration in which an annular sealing material is fixed by an annular support and fixed to a fan case has been proposed (see, for example, Patent Document 2).

特許第３７６２４７２号公報Japanese Patent No. 3762472 特開２０１１−２４７０９８号公報JP 2011-247098 A

しかしながら、上記特許文献１に記載されたようなゲル状のシール材を配設する構成では、シール材の量が安定せず、ファンとの接触度合いがばらつき、性能低下やモータロックを招くという課題があった。   However, in the configuration in which the gel-like sealing material as described in Patent Document 1 is provided, the amount of the sealing material is not stable, the degree of contact with the fan varies, and performance degradation and motor lock are caused. was there.

又、上記特許文献２に記載されたような環状のシール材を配設する構成では、シール材と支持体との固着及び支持体とファンケ−スの固着を行う必要があり、且つ、シール材を安定して固定するには一定以上の面積及び厚みのあるシール材が必要で大型化しコストアップするという課題を有していた。   Further, in the configuration in which the annular sealing material as described in Patent Document 2 is provided, it is necessary to fix the sealing material and the support and the support and the fan case, and the sealing material. In order to stably fix the sealing member, a sealing material having a certain area and thickness is required, which increases the size and costs.

本発明は、上記従来の課題を解決するもので、ファンとファンケースとの隙間を流れる循環流を安価に且つ精度良く安定的に防止し得る電動送風機、及び、それを搭載する信頼性の高い電機掃除機を提供することを目的とする。   The present invention solves the above-described conventional problems, and an electric blower that can stably and stably prevent a circulating flow that flows through a gap between a fan and a fan case at low cost and a high reliability in which the electric blower is mounted. An object is to provide an electric vacuum cleaner.

前記従来の課題を解決するために、本発明の電動送風機は、電動機部の回転軸に固定され回転駆動するファンと、前記ファンを被い中央部に吸気口を有するファンケースと、を備え、前記ファンケースは、前記吸気口に反ファン側に向かって突出形成された環状部を有し、前記環状部内に、リング状のベース部と、前記ベース部の外端から前記ファン側軸方向に突出したフランジ部と、を含む支持体を有し、前記ベース部の軸側端は前記環状部の軸側開放端円筒面と接触嵌合し、前記フランジ部は環状部反軸側面との間に空間を有し、前記フランジ部の前記ファン側の端部の少なくとも１箇所に、前記フランジ部の内周側と外周側とを連通する切欠部を設け、前記切欠部の反ファン側底部は前記ベース部のファン側端面よりも前記ファン側に位置し、前記環状部を水平面に載置した状態で、前記支持体にシール材を充填するもので、これによって、シール材の充填量がばらついても切欠部からシール材が流出することにより該シール材の表面位置が一定となるため、該ファンと該シール材との接触代が安定し、電動送風機及びそれを搭載する電気掃除機の吸い込み性能の安定が実現できる。又、少ないシール材量で循環流の防止が実現でき、且つ、該支持体と該ファンケースの固着も同時に行える為、コスト削減を実現できる。 In order to solve the above-described conventional problems, an electric blower of the present invention includes a fan that is fixed to a rotating shaft of a motor unit and is driven to rotate, and a fan case that covers the fan and has an air inlet at a central part thereof, The fan case has an annular portion that is formed to protrude toward the anti-fan side at the intake port, and in the annular portion, a ring-shaped base portion and an outer end of the base portion in the fan-side axial direction. A base including a projecting flange portion , the shaft-side end of the base portion being in contact with the shaft-side open end cylindrical surface of the annular portion, and the flange portion between the annular-part opposite-axis side surface And at least one end of the flange portion on the fan side is provided with a notch portion that communicates the inner periphery side and the outer periphery side of the flange portion, and the bottom portion on the anti-fan side of the notch portion is It is closer to the fan side than the end surface of the base side In the state where the annular portion is placed on a horizontal surface, the support is filled with a sealing material, so that the sealing material flows out from the notch even if the filling amount of the sealing material varies. Since the surface position of the sealing material is constant, the contact allowance between the fan and the sealing material is stabilized, and the suction performance of the electric blower and the vacuum cleaner on which the electric blower is mounted can be realized. Further, the circulation flow can be prevented with a small amount of the sealing material, and the support and the fan case can be fixed at the same time, so that the cost can be reduced.

又、環状部を大きなＲ形状で構成してもシール量を増大することなくシール性を維持できるため、最も流速が早く性能に影響のある環状部形状を自由に設計できるため、性能改善が実現できる。   Also, even if the annular part is configured with a large R shape, the sealing performance can be maintained without increasing the amount of sealing, so the annular part shape that has the fastest flow rate and affects performance can be freely designed, resulting in improved performance. it can.

また、本発明の電気掃除機は、請求項１〜９のいずれか１項に記載の電動送風機を搭載するもので、吸引性能に優れた電気掃除機を提供することができる。   Moreover, the vacuum cleaner of this invention mounts the electric blower of any one of Claims 1-9, and can provide the vacuum cleaner excellent in suction performance.

本発明の電動送風機は、ファンケースの吸気口の環状部に支持体を追加し支持体にシール材を充填するという簡単な方法でファンとファンケースとの隙間を流れる循環流を防止するだけでなく、接触過多や未接触を防止できるため、安価で高性能な電動送風機及び電気掃除機を実現できる。   The electric blower of the present invention simply prevents a circulating flow through the gap between the fan and the fan case by a simple method of adding a support to the annular portion of the air intake of the fan case and filling the support with a sealing material. In addition, since excessive contact and non-contact can be prevented, an inexpensive and high-performance electric blower and vacuum cleaner can be realized.

本発明の実施の形態１における電動送風機の断面図Sectional drawing of the electric blower in Embodiment 1 of this invention 同電動送風機の要部拡大断面図The main part enlarged sectional view of the electric blower 同要部拡大断面図の斜視図The perspective view of the principal part expanded sectional view 本発明の実施の形態２における電動送風機の支持体の斜視図The perspective view of the support body of the electric blower in Embodiment 2 of this invention 同電動送風機の他の例を示す要部拡大斜視図The principal part expansion perspective view which shows the other example of the electric blower 同電動送風機の他の例を示す要部拡大斜視図The principal part expansion perspective view which shows the other example of the electric blower 本発明の実施の形態３における電動送風機の要部拡大斜視図The principal part expansion perspective view of the electric blower in Embodiment 3 of this invention 同電動送風機の他の例を示す支持体の斜視図である。It is a perspective view of the support body which shows the other example of the electric blower.

第１の発明は、電動機部の回転軸に固定され回転駆動するファンと、前記ファンを被い中央部に吸気口を有するファンケースと、を備え、前記ファンケースは、前記吸気口に反ファン側に向かって突出形成された環状部を有し、前記環状部内に、リング状のベース部と、前記ベース部の外端から前記ファン側軸方向に突出したフランジ部と、を含む支持体を有し、前記ベース部の軸側端は前記環状部の軸側開放端円筒面と接触嵌合し、前記フランジ部は環状部反軸側面との間に空間を有し、前記フランジ部の前記ファン側の端部の少なくとも１箇所に、前記フランジ部の内周側と外周側とを連通する切欠部を設け、前記切欠部の反ファン側底部は前記ベース部のファン側端面よりも前記ファン側に位置し、前記環状部を水平面に載置した状態で、前記支持体にシール材を充填するもので、これによって、シール材の充填量がばらついても該切欠部からシール材が流出することにより該シール材の表面位置が一定となるため、該ファンと該シール材との接触代が安定し、電動送風機及びそれを搭載する電気掃除機の吸い込み性能の安定が実現できる。又、少ないシール材量で循環流の防止が実現でき、且つ、該支持体と該ファンケースの固着も同時に行える為、コスト削減を実現できる。 According to a first aspect of the present invention, there is provided a fan that is fixed to a rotating shaft of an electric motor unit and is driven to rotate, and a fan case that covers the fan and has an air inlet at a central portion thereof. an annular portion that is protruded toward the side, into the annulus, a ring-shaped base portion, a flange portion projecting from the outer end of the base portion on the fan side axial, the support comprising a a, shaft side end of the base portion is fitted in contact with the shaft-side open end cylindrical surface of said annular portion, said flange portion has a space between the annular portion axially opposite sides, the said flange A notch portion that communicates the inner peripheral side and the outer peripheral side of the flange portion is provided in at least one of the end portions on the fan side, and the bottom side of the notch portion on the fan side is closer to the fan side end surface than the fan side end surface of the base portion. Located on the side, the annular part is placed on a horizontal plane The support member is filled with a sealing material, and even if the filling amount of the sealing material varies, the sealing material flows out from the notch, so that the surface position of the sealing material becomes constant. The contact allowance between the electric blower and the sealing material is stabilized, and the suction performance of the electric blower and the vacuum cleaner on which the electric blower is mounted can be realized. Further, the circulation flow can be prevented with a small amount of the sealing material, and the support and the fan case can be fixed at the same time, so that the cost can be reduced.

又、環状部を大きなＲ形状で構成してもシール量を増大することなくシール性を維持できるため、最も流速が早く性能に影響のある環状部形状を自由に設計できるため、性能改善が実現できる。   Also, even if the annular part is configured with a large R shape, the sealing performance can be maintained without increasing the amount of sealing, so the annular part shape that has the fastest flow rate and affects performance can be freely designed, resulting in improved performance. it can.

第２の発明は、特に、第１の発明のベース部の軸側端部よりもフランジ部側の端部がファン側にテーパ状若しくはすり鉢状若しくは階段状等に突出するもので、充填されるシール材の量をより少なく出来ると共に、シール材を充填できる幅が広くなることから、シール材充填時にファンケース軸側外にはみ出すことを防止できる。又、支持体とファンとの接触を避けることが出来る。   In particular, the second invention is such that the end of the flange portion side of the base portion of the first invention protrudes in a taper shape, a mortar shape or a step shape toward the fan side, and is filled. Since the amount of the sealing material can be reduced and the width in which the sealing material can be filled is increased, it is possible to prevent the sealing material from protruding outside the fan case shaft. Further, contact between the support and the fan can be avoided.

第３の発明は、特に、第２の発明の前記突出しているベース部のフランジ部側の端部若しくは前記フランジ部の内周側に軸方向の貫通穴を設けたもので、第１の発明における切欠部と同様にある一定以上のシール材を充填するとこの穴からシール材が漏れ出し、第１の発明と同等の効果が得られる。 In the third invention, in particular, an axial through hole is provided on an end portion of the protruding base portion on the flange portion side or on an inner peripheral side of the flange portion. When a certain amount or more of a sealing material is filled in the same manner as the notch portion in FIG. 2, the sealing material leaks from this hole, and the same effect as in the first invention can be obtained.

第４の発明は、特に、第１〜３のいずれかひとつの発明のベース部のファン側端面を底面としフランジ部の切欠部の反ファン側底部を上面とし環状部の軸側開放端円筒面を内周面とし、フランジ部内周面を外周面とし形成される環状部体積以上のシール材を充填し、前記環状部体積以上の余分なシール材が前記フランジ部の外周側若しくは内周側へ流出するもので、支持体に残るシール材の量は一定となり、ファンとの接触度合いも一定となるため、接触過多や未接触が発生し難く、循環流発生や接触抵抗増大やシールカス付着等による性能低下を防止することができる。また、支持体から流れ出たシール材が支持体の外部に流れ落ち、ファンケースと支持体の当接部をシール材で満たすことが可能となり、ファンケースと支持体の固着が同時に行え、別途接着剤等にて固着する必要がなく作業性改善、コスト低減を実現できる。 In particular, the fourth aspect of the present invention is the cylindrical surface of the annular side shaft-side open end with the fan-side end surface of the base portion of any one of the first to third aspects as the bottom surface and the non-fan-side bottom portion of the notch portion of the flange portion as the top surface. The inner circumferential surface of the flange portion and the outer circumferential surface of the flange portion are filled with a sealing material that is larger than the annular portion volume, and excess sealing material that is larger than the annular portion volume is directed to the outer circumferential side or inner circumferential side of the flange portion. The amount of sealing material remaining on the support is constant, and the degree of contact with the fan is also constant, so that excessive contact and non-contact are unlikely to occur, due to the occurrence of circulating flow, increased contact resistance, adhesion of seal residue, etc. Performance degradation can be prevented. In addition, the seal material that has flowed out of the support body flows down to the outside of the support body, so that the contact portion between the fan case and the support body can be filled with the seal material, and the fan case and the support body can be fixed simultaneously. The workability can be improved and the cost can be reduced.

第５の発明は、特に、第４の発明のベース部のファン側端面からファンの前面シュラウド吸込口端部までの距離Ａ＜前記ファン側端面から反ファン側底部までの距離Ｂとし、前記距離Ｂ＜前記ファン側端面から環状部内周側端部までの距離Ｃとして、シール材を前記ファンの端部で削り取り、前記シール材と前記前面シュラウド吸込口端部が略摺接状態にするもので、それにより支持体にシール材を充填するとシール材は切欠部と同高さとなり、該ファンケースの環状部の環状部内周側端部より低くなり、ファンケースから溢れだすことがない。また、ファンの前面シュラウド吸込口端部の位置はシール材に接触することとなり、シール材と未接触となることがない。よって、安定した性能を実現できる。   In the fifth invention, in particular, the distance A from the fan side end surface of the base portion of the fourth invention to the front shroud suction port end of the fan is a distance B from the fan side end surface to the non-fan side bottom, and the distance B <Distance C from the fan-side end surface to the inner peripheral side end of the annular portion, the sealing material is scraped off at the end of the fan, and the sealing material and the front shroud suction port end are brought into a substantially sliding contact state. Thus, when the support member is filled with the sealing material, the sealing material becomes the same height as the cutout portion, becomes lower than the inner peripheral side end portion of the annular portion of the fan case, and does not overflow from the fan case. Further, the position of the front shroud suction port end portion of the fan is in contact with the sealing material, and is not in contact with the sealing material. Therefore, stable performance can be realized.

第６の発明は、特に、第１〜５のいずれかひとつの発明のベース部の反ファン側軸方向に逆リブを延設し、前記逆リブをファンケースに当接させるもので、支持体は軸方向位置で固定され、且つ、軸に対しより直角に配置されることとなり、それに充填されるシール材の平面度をより安定できる。よって、安定した性能を実現できる。   In particular, the sixth invention is such that a reverse rib is extended in the anti-fan side axial direction of the base portion of any one of the first to fifth inventions, and the reverse rib is brought into contact with the fan case. Is fixed at an axial position and is arranged at a right angle to the axis, and the flatness of the sealing material filled therein can be further stabilized. Therefore, stable performance can be realized.

第７の発明は、特に、第６の発明の逆リブが、反ファン側に突出している環状部の内周面
、かつ、前記回転軸に対して直交する面において、前記ファンケースと当接するもので、支持体の逆リブはファンケースとの軸方向位置が安定し傾きなく位置することが可能で、回転軸に対しより直角な面となりファンの吸気穴縁との接触が安定する。 In the seventh aspect of the invention, in particular, the inner peripheral surface of the annular portion in which the reverse rib of the sixth aspect of the invention protrudes toward the fan side.
In addition, the reverse rib of the support member can be positioned without tilting with respect to the fan case in a plane that is in contact with the fan case on a plane orthogonal to the rotation axis. As a result, the contact with the edge of the fan intake hole becomes stable.

第８の発明は、特に、第６又は第７の発明の逆リブの反ファン側軸方向の端部の一部に少なくとも１箇所の逆切欠部を設けたもので、支持体から溢れ出したシール材は逆切欠部から支持体の逆リブの内周側へも流れ込み、逆リブの両側から固着することが可能となりより確実にファンケースと支持体の固着が行え、電動送風機の信頼性を高めることができる。 In the eighth aspect of the invention, in particular, at least one reverse notch is provided at a part of the end of the reverse rib side of the reverse rib of the sixth or seventh aspect, and overflows from the support. The seal material also flows from the reverse notch into the inner periphery of the reverse rib of the support, and it can be fixed from both sides of the reverse rib, so that the fan case and the support can be fixed more securely, improving the reliability of the electric blower. Can be increased.

第９の発明は、特に、第８の発明の逆切欠部と、フランジ部に設けた切欠部とを、前記回転軸に対する周方向において異なる位置に配置したもので、フランジ切欠部から溢れ出したシール材は反ファン側逆リブを伝いファンケースとの当接部まで達し、逆切欠部まで左右へ広がり逆リブの内周側へ流れ込み、より多くの接触面で両側から固着することが可能となりより確実にファンケースと支持体の固着が行える。 A ninth aspect of the invention, in particular, a reverse notch the eighth invention, a notch portion provided in the flange portion, which was arranged at different positions in the circumferential direction with respect to the rotation axis, overflowed from the flange notch The seal material passes through the reverse rib on the fan side and reaches the contact part with the fan case, spreads left and right to the reverse notch, flows into the inner periphery of the reverse rib, and can be fixed from both sides with more contact surfaces. The fan case and the support can be more securely fixed.

第１０の発明に係る電気掃除機は、請求項１〜９のいずれか１項に記載の電動送風機を搭載するもので、吸引性能に優れた電気掃除機を提供することができる。   The vacuum cleaner which concerns on 10th invention mounts the electric blower of any one of Claims 1-9, and can provide the vacuum cleaner excellent in suction performance.

以下、本発明の実施の形態について、図面を参照しながら説明する。尚、この実施の形
態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiment.

（実施の形態１）
図１は、本発明の実施の形態１における電動送風機の断面図、図２は、同電動送風機の要部拡大断面図、図３は、同要部拡大断面図の斜視図である。 (Embodiment 1)
1 is a cross-sectional view of the electric blower according to Embodiment 1 of the present invention, FIG. 2 is an enlarged cross-sectional view of a main part of the electric blower, and FIG. 3 is a perspective view of the enlarged cross-sectional view of the main part.

本実施の形態における電動送風機は、電動機部１及び送風機部２から構成されている。まず、電動機部１について説明すると、固定子４及び回転子５が一端側が開口した有底筒状のブラケット３に収納され、ブラケット３の一端側開口はフレーム６により閉塞されている。前記ブラケット３にブラシ保持具７が固定され、内部に保持したカーボンブラシ８を回転子５の整流子９の外周面に弾接させている。   The electric blower in the present embodiment includes an electric motor unit 1 and an air blower unit 2. First, the electric motor unit 1 will be described. The stator 4 and the rotor 5 are housed in a bottomed cylindrical bracket 3 that is open at one end, and the opening at one end of the bracket 3 is closed by a frame 6. A brush holder 7 is fixed to the bracket 3, and a carbon brush 8 held inside is elastically contacted with the outer peripheral surface of the commutator 9 of the rotor 5.

次に送風機部２について説明すると、フレーム６に固定されるディフューザ１０は、後述するファン１１の外周に対応する位置に固定案内翼１２を有している。ファン１１は、前記ディフューザ１０を貫通して伸びる回転子５の回転軸１３に固定され、中央部に吸気穴１４を有する前面シュラウド１５と、後面シュラウド１６と、前面シュラウド１５と後面シュラウド１６との間に固定される複数のブレード１７とから構成されている。   Next, the blower unit 2 will be described. The diffuser 10 fixed to the frame 6 has fixed guide vanes 12 at positions corresponding to the outer periphery of the fan 11 described later. The fan 11 is fixed to the rotating shaft 13 of the rotor 5 extending through the diffuser 10, and includes a front shroud 15 having a suction hole 14 in the center, a rear shroud 16, a front shroud 15, and a rear shroud 16. It comprises a plurality of blades 17 fixed therebetween.

前記ディフューザ１０及びファン１１を被うファンケース１８は、前記フレーム６に圧入して固定されている。前記ファンケース１８の略中央部には吸気口１９が形成され、吸気口１９の周縁に外側に向かって環状部２０を膨出形成しており、環状部２０内にファン１１の吸気穴１４が位置するようになっている。   A fan case 18 that covers the diffuser 10 and the fan 11 is press-fitted into the frame 6 and fixed. An air inlet 19 is formed in a substantially central portion of the fan case 18, and an annular portion 20 is formed to bulge outward at the periphery of the air inlet 19, and the air inlet hole 14 of the fan 11 is formed in the annular portion 20. It is supposed to be located.

前記環状部２０内に配置される支持体２１は、リング状のベース部２２とベース部２２の外端からファン側軸方向に突出したフランジ部２３を有し、ベース部２２の軸側端部２４は環状部２０の軸側開放端円筒面２５と接触嵌合し、フランジ部２３は環状部反軸側面２０ａとの間に空間を有し、フランジ部２３の端部２７の少なくとも１箇所に切欠部２８を設け、切欠部２８の反ファン側底部２９はベース部２２のファン側端面３０よりもファン１１側に位置するものである。   The support body 21 disposed in the annular portion 20 includes a ring-shaped base portion 22 and a flange portion 23 protruding from the outer end of the base portion 22 in the fan-side axial direction. 24 is in contact fitting with the axial side open end cylindrical surface 25 of the annular portion 20, and the flange portion 23 has a space between the annular portion opposite shaft side surface 20 a, and at least one end 27 of the flange portion 23. The notch portion 28 is provided, and the non-fan side bottom portion 29 of the notch portion 28 is located closer to the fan 11 than the fan side end surface 30 of the base portion 22.

ファンケース１８を吸気口１９を下にして水平面に載置し、支持体２１の内面にシール材３１の原料を所定量充填し、シール材３１の表面張力により全面にわたって平滑となった状態で硬化させファン１１の前面シュラウド吸込口端部３２を当接させている。   The fan case 18 is placed on a horizontal surface with the air inlet 19 facing down, and the inner surface of the support 21 is filled with a predetermined amount of the raw material of the sealing material 31 and cured in a state where the entire surface is smoothed by the surface tension of the sealing material 31. The front shroud inlet end 32 of the fan 11 is brought into contact with the fan 11.

このファンケース１８をフレーム６に圧入固定し、ディフューザ１０及びファン１１を被って組み立てる。この組立状態においては、前面シュラウド吸込口端部３２がシール材３１に当接し、シール材３１は柔軟性を有しているため、前面シュラウド吸込口端部３２の当接部分が変形する。   The fan case 18 is press-fitted and fixed to the frame 6, and is assembled by covering the diffuser 10 and the fan 11. In this assembled state, the front shroud suction port end portion 32 abuts on the sealing material 31 and the sealing material 31 has flexibility, so that the abutting portion of the front shroud suction port end portion 32 is deformed.

電動送風機を運転すると、ファン１１は、シール材３１に摺接しながら回転して、前面シュラウド吸込口端部３２でシール材３１を削り取り、シール材３１と前面シュラウド吸込口端部３２が略摺接状態となる。このシール材３１と前面シュラウド吸込口端部３２の略摺接状態により循環流の発生が防止される。   When the electric blower is operated, the fan 11 rotates while slidingly contacting the sealing material 31, scrapes off the sealing material 31 at the front shroud suction port end 32, and the sealing material 31 and the front shroud suction port end 32 are substantially in sliding contact. It becomes a state. The substantially sliding contact state between the sealing material 31 and the front shroud suction port end 32 prevents generation of a circulating flow.

この支持体２１により環状部２０に充填されるシール量は大幅に削減でき、シール材３１の硬化収縮による寸法変化が小さくなる。一定量以上のシール材３１を充填すると過剰なシール材３１は切欠部２８から流出し、支持体２１に充填されるシール材３１は一定以上とはならない為、ファン１１との接触が過剰になることがなく、ファン１１が接触抵抗に負けてロックする危険性が低くなる。よって、モータロックによるモータ損傷や整流子９に与えるダメージを防止できる。また、ファン１１によって削り取られるシール材３１
の削りカスが多量にファン１１やディフューザ１０やファンケース１８に付着することがなく、風路の確保と風の流動抵抗を低減でき、電動送風機の性能低下を防止することができる。 The amount of seal filled in the annular portion 20 by the support 21 can be greatly reduced, and the dimensional change due to curing shrinkage of the seal material 31 is reduced. When a certain amount or more of the sealing material 31 is filled, the excess sealing material 31 flows out from the notch 28, and the sealing material 31 filled in the support 21 does not exceed a certain level, so that the contact with the fan 11 becomes excessive. This reduces the risk that the fan 11 will lock against the contact resistance. Therefore, it is possible to prevent damage to the motor and commutator 9 due to motor lock. Further, the sealing material 31 scraped off by the fan 11.
As a result, a large amount of shavings does not adhere to the fan 11, diffuser 10, or fan case 18, the air passage can be secured and the flow resistance of the wind can be reduced, and the performance of the electric blower can be prevented from deteriorating.

また、ベース部２２のファン側端面３０を底面としフランジ部２３の反ファン側底部２９を上面とし環状部２０の軸側開放端円筒面２５を内周面とし、フランジ部内周面３７を外周面とし形成される環状部体積以上のシール材３１を充填し体積以上の余分なシール材３１がフランジ部外周側３８へ流出するものである。   Further, the fan-side end surface 30 of the base portion 22 is the bottom surface, the non-fan-side bottom portion 29 of the flange portion 23 is the top surface, the shaft-side open end cylindrical surface 25 of the annular portion 20 is the inner peripheral surface, and the flange inner peripheral surface 37 is the outer peripheral surface. The sealing material 31 having a volume greater than or equal to the annular portion volume is filled, and excess sealing material 31 having a volume or more flows out to the flange portion outer peripheral side 38.

それにより支持体２１に残るシール材３１の量は一定となり、ファン１１との接触度合いも一定となるため、接触過多や未接触が発生し難く、循環流発生や接触抵抗増大やシールカス付着等による性能低下を防止することができる。また、支持体２１から流れ出たシール材３１が支持体２１の外部に流れ落ち、ファンケース１８と支持体２１の当接部３５をシール材３１で満たすことが可能となり、ファンケース１８と支持体２１の固着が同時に行え、別途接着剤等にて固着する必要がなく作業性改善、コスト低減を実現できる。   As a result, the amount of the sealing material 31 remaining on the support 21 is constant, and the degree of contact with the fan 11 is also constant, so that excessive contact and non-contact are unlikely to occur. Performance degradation can be prevented. Further, the sealing material 31 flowing out from the support 21 flows down to the outside of the support 21, and the contact portion 35 between the fan case 18 and the support 21 can be filled with the sealing material 31. The fan case 18 and the support 21 Can be fixed at the same time, and it is not necessary to fix them separately with an adhesive or the like, thereby improving workability and reducing costs.

また、ベース部２２のファン側端面３０からファン１１の前面シュラウド吸込口端部３２までの距離Ａ＜ファン側端面３０からフランジ部２３の反ファン側底部２９までの距離Ｂとし、ファン側端面３０から反ファン側底部２９までの距離Ｂ＜ファン側端面３０から環状部内周側端部２６までの距離Ｃとすることで、シール材３１をファン１１の端部で削り取り、シール材３１とファンの前面シュラウド吸込口端部３２が略摺接状態にすることができる。それにより支持体２１にシール材３１を充填するとシール材３１は切欠部２８と同高さとなり、ファンケース１８の環状部２０の環状部内周側端部２６より低くなり、ファンケース１８から溢れだすことがない。また、ファン１１の前面シュラウド吸込口端部３２の位置はシール材３１に接触することとなり、シール材３１と未接触となることがない。よって、安定した性能を実現できる。   Further, the distance A from the fan side end surface 30 of the base portion 22 to the front shroud inlet end portion 32 of the fan 11 <the distance B from the fan side end surface 30 to the non-fan side bottom portion 29 of the flange portion 23, and the fan side end surface 30. The distance B from the fan-side bottom portion 29 to the distance C from the fan-side end surface 30 to the annular portion inner peripheral end 26 is scraped off at the end of the fan 11, and the sealing material 31 and the fan The front shroud inlet end 32 can be brought into a substantially sliding contact state. Accordingly, when the support member 21 is filled with the sealing material 31, the sealing material 31 becomes the same height as the notch portion 28, becomes lower than the annular portion inner peripheral side end portion 26 of the annular portion 20 of the fan case 18, and overflows from the fan case 18. There is nothing. Further, the position of the front shroud inlet end portion 32 of the fan 11 comes into contact with the sealing material 31 and does not come into contact with the sealing material 31. Therefore, stable performance can be realized.

また、本実施の形態における電動送風機は、ベース部２２の反ファン側軸方向に伸びると共にファンケース１８と当接する逆リブ３９を有している。それにより、支持体２１の軸方向位置が固定され、且つ、軸に対しより直角に配置されることとなり、それに充填されるシール材３１の平面度をより安定させることができる。よって、安定した性能を実現できる。   In addition, the electric blower in the present embodiment has a reverse rib 39 that extends in the axial direction opposite to the fan of the base portion 22 and contacts the fan case 18. As a result, the axial position of the support 21 is fixed, and the support 21 is arranged at a right angle to the axis, and the flatness of the sealing material 31 filled therein can be further stabilized. Therefore, stable performance can be realized.

また、本実施の形態では、ベース部２２の反ファン側軸方向に伸びた逆リブ３９を、図２に示すように環状部２０の最も軸に対し直角面に近い位置に設けている。これにより支持体２１の逆リブ３９はファンケース１８との軸方向位置が安定し傾きなく位置することが可能で、回転軸１３に対しより直角な面となりファン１１の吸気穴１４の縁との接触が安定する。   Further, in the present embodiment, the reverse rib 39 extending in the axial direction opposite to the fan of the base portion 22 is provided at a position closest to the plane perpendicular to the axis of the annular portion 20 as shown in FIG. As a result, the reverse rib 39 of the support 21 can be positioned with no inclination and stable in the axial direction with respect to the fan case 18, becomes a plane perpendicular to the rotating shaft 13 and the edge of the intake hole 14 of the fan 11. Contact is stable.

（実施の形態２）
図４は、本発明の実施の形態２における電動送風機の支持体の斜視図である。尚、上記実施の形態１に於ける電動送風機と同一部分には同一符号を付してその説明を省略する。 (Embodiment 2)
FIG. 4 is a perspective view of a support for an electric blower according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the same part as the electric blower in the said Embodiment 1, and the description is abbreviate | omitted.

本実施の形態における電動送風機は、図４に示すように、リング状のベース部２２の軸側端部２４よりもファン側端面３０をファン１１側にテーパ状若しくはすり鉢状に突出させたものである。   As shown in FIG. 4, the electric blower according to the present embodiment has a fan-side end surface 30 that protrudes in a taper shape or a mortar shape from the shaft-side end portion 24 of the ring-shaped base portion 22 toward the fan 11. is there.

本実施の形態における電動送風機は以上のように構成されているので、充填されるシール材３１の量をより少なく出来ると共に、シール材３１を充填できる幅が広くなることから、シール材３１の充填時にファンケース１８の軸側外にはみ出すことを防止できる。又
、支持体２１とファン１１との接触を避けることが出来る。 Since the electric blower in the present embodiment is configured as described above, the amount of the sealing material 31 to be filled can be reduced, and the width in which the sealing material 31 can be filled becomes wide. Sometimes, the fan case 18 can be prevented from protruding outside the shaft. Further, the contact between the support 21 and the fan 11 can be avoided.

なお、図５に示すように、リング状のベース部２２の軸側端部２４よりファン側端面３０を階段状等に突出させても同様の効果が得られるものである。   As shown in FIG. 5, the same effect can be obtained even if the fan-side end face 30 protrudes from the shaft-side end portion 24 of the ring-shaped base portion 22 in a stepped manner or the like.

また、本実施の形態では、図４，６に示すように、ベース部２２の反ファン側軸方向に伸びた逆リブ３９の端部の一部に逆切欠部４０を設けている。これにより、支持体２１から溢れ出したシール材３１は逆切欠部４０から支持体２１の逆リブ３９の内周側へも流れ込み、逆リブ３９の両側から固着することが可能となりより確実にファンケース１８と支持体２１の固着が行え、電動送風機の信頼性を高めることができる。   In the present embodiment, as shown in FIGS. 4 and 6, a reverse notch 40 is provided at a part of the end of the reverse rib 39 extending in the axial direction opposite to the fan of the base portion 22. As a result, the sealing material 31 overflowing from the support 21 flows into the inner peripheral side of the reverse rib 39 of the support 21 from the reverse notch 40, and can be fixed from both sides of the reverse rib 39, so that the fan can be surely secured. The case 18 and the support 21 can be fixed, and the reliability of the electric blower can be improved.

さらに、本実施の形態では、図４に示すようにベース部２２の反ファン側軸方向に伸びた逆リブ３９の端部に設けた逆切欠部４０を、フランジ部２３の切欠部２８と軸に対し角度を有する位置に配置している。それにより、切欠部２８から溢れ出したシール材３１は逆リブ３９を伝いファンケース１８との当接部まで達し、逆切欠部４０まで左右へ広がり逆リブ３９の内周側へ流れ込み、より多くの接触面で両側から固着することが可能となりより確実にファンケース１８と支持体２１の固着が行える。   Furthermore, in the present embodiment, as shown in FIG. 4, the reverse notch 40 provided at the end of the reverse rib 39 extending in the axial direction opposite to the fan of the base portion 22 is connected to the notch 28 of the flange portion 23 and the shaft. It arrange | positions in the position which has an angle with respect to. As a result, the sealing material 31 overflowing from the cutout portion 28 travels through the reverse rib 39 to the contact portion with the fan case 18, spreads to the reverse cutout portion 40 to the left and right, and flows into the inner peripheral side of the reverse rib 39. It is possible to fix the fan case 18 and the support body 21 more reliably on both contact surfaces.

(実施の形態３)
図７は、本発明の実施の形態３における電動送風機の要部拡大斜視図である。尚、上記実施の形態に於ける電動送風機と同一部分には同一符号を付してその説明を省略する。 (Embodiment 3)
FIG. 7 is an enlarged perspective view of a main part of the electric blower according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the same part as the electric blower in the said embodiment, and the description is abbreviate | omitted.

本実施の形態における電動送風機は、図７に示すように、リング状のベース部２２のフランジ部側３３に軸方向の貫通穴３４を設けたものである。これにより切欠部２８と同様にある一定以上のシール材３１を充填すると貫通穴３４からシール材３１が漏れ出すので、実施の形態１と同様の効果が得られるものである。   As shown in FIG. 7, the electric blower in the present embodiment is provided with an axial through hole 34 on the flange portion side 33 of the ring-shaped base portion 22. As a result, the sealing material 31 leaks from the through-hole 34 when the sealing material 31 of a certain level or more is filled in the same manner as the cutout portion 28, so that the same effect as in the first embodiment can be obtained.

また、図８に示すように、フランジ部２３に軸方向の貫通穴３４を設けても同様の効果が得られることは言うまでも無い。   Further, as shown in FIG. 8, it goes without saying that the same effect can be obtained even if an axial through hole 34 is provided in the flange portion 23.

又、上記実施の形態１〜３のいずれかにおける電動送風機を電気掃除機に搭載すれば、吸引性能に優れた電気掃除機を提供することができる。   Moreover, if the electric blower in any of the said Embodiment 1-3 is mounted in a vacuum cleaner, the vacuum cleaner excellent in the suction performance can be provided.

以上のように、本発明にかかる電動送風機は、ファンケースの環状部内に切欠部を有する支持体を配置すると言う簡単な方法で、精度良くファンケースとファンとのリーク風を防止でき、安価で高性能な電動送風機及びそれを搭載する電気掃除機の実現に適用できる。   As described above, the electric blower according to the present invention can prevent leaking air between the fan case and the fan with high accuracy by a simple method of arranging a support body having a notch in the annular portion of the fan case, and is inexpensive. It can be applied to the realization of a high-performance electric blower and a vacuum cleaner equipped with it.

１ 電動機部
２ 送風機部
３ ブラケット
４ 固定子
５ 回転子
６ フレーム
７ ブラシ保持具
８ カーボンブラシ
９ 整流子
１０ ディフューザ
１１ ファン
１２ 固定案内翼
１３ 回転軸
１４ 吸気穴
１５ 前面シュラウド
１６ 後面シュラウド
１７ ブレード
１８ ファンケース
１９ 吸気口
２０ 環状部
２０ａ 環状部反軸側面
２１ 支持体
２２ ベース部
２３ フランジ部
２４ 軸側端部
２５ 軸側開放端円筒面
２６ 環状部内周側端部
２７ 端部
２８ 切欠部
２９ 反ファン側底部
３０ ファン側端面
３１ シール材
３２ 前面シュラウド吸込口端部
３３ フランジ部側
３４ 貫通穴
３５ 当接部
３７ フランジ部内周面
３８ フランジ部外周側
３９ 逆リブ
４０ 逆切欠部 DESCRIPTION OF SYMBOLS 1 Electric motor part 2 Blower part 3 Bracket 4 Stator 5 Rotor 6 Frame 7 Brush holder 8 Carbon brush 9 Commutator 10 Diffuser 11 Fan 12 Fixed guide vane 13 Rotating shaft 14 Intake hole 15 Front shroud 16 Rear shroud 17 Blade 18 Fan Case 19 Air inlet 20 Annular part 20a Annular part counter-shaft side surface 21 Support body 22 Base part 23 Flange part 24 Shaft side end part 25 Shaft side open end cylindrical surface 26 Annular part inner peripheral side end part 27 End part 28 Notch part 29 Anti fan Side bottom portion 30 Fan side end surface 31 Sealing material 32 Front shroud suction port end portion 33 Flange portion side 34 Through hole 35 Contact portion 37 Flange portion inner peripheral surface 38 Flange portion outer peripheral side 39 Reverse rib 40 Reverse notch

Claims (10)

電動機部の回転軸に固定され回転駆動するファンと、
前記ファンを被い中央部に吸気口を有するファンケースと、を備え、
前記ファンケースは、前記吸気口に反ファン側に向かって突出形成された環状部を有し、前記環状部内に、リング状のベース部と、前記ベース部の外端から前記ファン側軸方向に突出したフランジ部と、を含む支持体を有し、
前記ベース部の軸側端は前記環状部の軸側開放端円筒面と接触嵌合し、
前記フランジ部は環状部反軸側面との間に空間を有し、
前記フランジ部の前記ファン側の端部の少なくとも１箇所に、前記フランジ部の内周側と外周側とを連通する切欠部を設け、
前記切欠部の反ファン側底部は、前記ベース部のファン側端面よりも前記ファン側に位置し、
前記環状部を水平面に載置した状態で、前記支持体にシール材を充填することを特徴とする電動送風機。 A fan that is fixed to the rotating shaft of the electric motor unit and is driven to rotate;
A fan case covering the fan and having an air inlet in the center ,
The fan case has an annular portion that is formed to protrude toward the anti-fan side at the intake port, and in the annular portion, a ring-shaped base portion and an outer end of the base portion in the fan-side axial direction. A support including a protruding flange portion,
The shaft side end of the base part is in contact with the shaft side open end cylindrical surface of the annular part,
The flange portion has a space between the annular portion and the opposite axis side surface,
At least one place on the fan side end of the flange portion is provided with a notch portion that communicates the inner peripheral side and the outer peripheral side of the flange portion ;
The non-fan side bottom of the notch is located on the fan side of the fan side end surface of the base,
An electric blower characterized by filling the support with a sealing material in a state where the annular portion is placed on a horizontal plane. ベース部の軸側端部よりもフランジ部側の端部がファン側にテーパ状若しくはすり鉢状若しくは階段状等に突出することを特徴とする請求項１に記載の電動送風機。 2. The electric blower according to claim 1, wherein an end of the base portion on the flange portion side with respect to the shaft side end portion protrudes in a taper shape, a mortar shape, a step shape, or the like toward the fan side. 前記突出しているベース部のフランジ部側の端部若しくは前記フランジ部の内周側に軸方向の貫通穴を設けた請求項２に記載の電動送風機。 The electric blower according to claim 2, wherein an axial through hole is provided on an end portion of the protruding base portion on the flange portion side or on an inner peripheral side of the flange portion. ベース部のファン側端面を底面としフランジ部の切欠部の反ファン側底部を上面とし環状部の軸側開放端円筒面を内周面とし、フランジ部内周面を外周面とし形成される環状部体積以上のシール材を充填し、前記環状部体積以上の余分なシール材が前記フランジ部の外
周側若しくは内周側へ流出することを特徴とする請求項１〜３のいずれか１項に記載の電動送風機。 Annular part formed with the fan side end face of the base part as the bottom face, the non-fan side bottom part of the notch part of the flange part as the top face, the axial side open end cylindrical face of the annular part as the inner peripheral face, and the flange part inner peripheral face as the outer peripheral face The sealing material more than volume is filled, and the excess sealing material more than the annular portion volume flows out to the outer peripheral side or the inner peripheral side of the flange portion. Electric blower. ベース部のファン側端面からファンの前面シュラウド吸込口端部までの距離Ａ＜前記ファン側端面から反ファン側底部までの距離Ｂとし、前記距離Ｂ＜前記ファン側端面から環状部内周側端部までの距離Ｃとして、シール材を前記ファンの端部で削り取り、前記シール材と前記前面シュラウド吸込口端部が略摺接状態にすることを特徴とする請求項４に記載の電動送風機。 The distance A from the fan side end surface of the base portion to the front shroud suction port end portion of the fan is a distance B from the fan side end surface to the non-fan side bottom portion, and the distance B <the fan side end surface to the annular portion inner peripheral side end portion 5. The electric blower according to claim 4, wherein the sealing material is scraped off at an end portion of the fan as a distance C until the sealing material and the front shroud suction port end portion are in a substantially sliding contact state. ベース部の反ファン側軸方向に逆リブを延設し、前記逆リブをファンケースに当接させることを特徴とする請求項１〜５のいずれか１項に記載の電動送風機。 The electric blower according to any one of claims 1 to 5, wherein a reverse rib is extended in an axial direction opposite to the fan side of the base portion, and the reverse rib is brought into contact with a fan case. 前記逆リブは、反ファン側に突出している環状部の内周面、かつ、前記回転軸に対して直交する面において、前記ファンケースと当接することを特徴とする請求項６に記載の電動送風機。 The electric motor according to claim 6, wherein the reverse rib is in contact with the fan case on an inner peripheral surface of an annular portion protruding to the anti-fan side and a surface orthogonal to the rotation axis. Blower. 逆リブの反ファン側軸方向の端部の一部に少なくとも１箇所の逆切欠部を設けたことを特徴とする請求項６又は７に記載の電動送風機。 The electric blower according to claim 6 or 7, wherein at least one reverse notch is provided at a part of an end of the reverse rib in the axial direction opposite to the fan. 逆切欠部と、フランジ部に設けた切欠部とを、前記回転軸に対する周方向において異なる位置に配置したことを特徴とする請求項８に記載の電動送風機。 The electric blower according to claim 8 , wherein the reverse notch and the notch provided in the flange are arranged at different positions in the circumferential direction with respect to the rotation shaft . 請求項１〜９のいずれか１項に記載の電動送風機を搭載する電気掃除機。 The vacuum cleaner carrying the electric blower of any one of Claims 1-9.
JP2013186904A 2013-09-10 2013-09-10 Electric blower and electric vacuum cleaner using the same Expired - Fee Related JP6142288B2 (en)

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