JP2013087640A - Electric blower - Google Patents

Electric blower Download PDF

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JP2013087640A
JP2013087640A JP2011226429A JP2011226429A JP2013087640A JP 2013087640 A JP2013087640 A JP 2013087640A JP 2011226429 A JP2011226429 A JP 2011226429A JP 2011226429 A JP2011226429 A JP 2011226429A JP 2013087640 A JP2013087640 A JP 2013087640A
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Prior art keywords
bracket
electric blower
pair
bridge portion
bearing holding
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Tetsuo Shimazaki
哲夫 嶋崎
Hirofumi Mizukami
裕文 水上
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Panasonic Corp
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Panasonic Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an electric blower that is small in vibration even in high speed rotation and highly reliable and has superior blowing performance.SOLUTION: In the electric blower, a bracket B that opens on one end side of an annular wall and has a bottom wall on the other end side and is formed into a bottomed cylindrical shape, is connected to a bracket A that has a bearing holding part and an arm shaped bridge part, and a field iron core and an armature that is held with a pair of bearings are arranged inside the connected brackets. The bridge part of the bracket A is configured to be positioned on the projection line connecting a pair of connection parts that connect the brackets A, B, and the outer circumferential corner part of the field iron core is configured to be positioned near the connection part.

Description

本発明は、掃除機などの電気機器等に用いられる電動送風機に関するものである。   The present invention relates to an electric blower used for electrical equipment such as a vacuum cleaner.

従来、この種の電動送風機は、吸い込み力を得るために回転ファンを高速回転させている。回転ファンで吸引した空気は、エアガイドによって構成された通風路を経て、モータ内部を通過して外部に排出される。高速回転を可能とするため、界磁鉄心を内蔵し、回転子の一端をささえる軸受保持部を有するブラケットBと、回転ファン側に設けらて、回転子の他端の軸受保持部を有するブラケットAが結合されている。このブラケットAは界磁鉄心の間を径方向に横断する形でブリッジ状になっており、中央に軸受保持部が設けられている(例えば、特許文献1参照)。   Conventionally, this type of electric blower rotates a rotary fan at high speed in order to obtain a suction force. The air sucked by the rotating fan passes through the inside of the motor through the ventilation path constituted by the air guide and is discharged to the outside. In order to enable high-speed rotation, a bracket B having a built-in field core and having a bearing holding part that holds one end of the rotor, and a bracket having a bearing holding part at the other end of the rotor provided on the rotating fan side A is bound. The bracket A is bridged so as to cross between the field iron cores in the radial direction, and a bearing holding portion is provided at the center (see, for example, Patent Document 1).

また、別の例として、略90度間隔にブラケットAとブラケットBとの結合部を配置することで、回転ファンの持つアンバランスによる径方向の振れを抑制しているものがある(例えば特許文献2参照)。   Further, as another example, there is one that suppresses radial shake due to unbalance of the rotating fan by disposing the coupling portions of the bracket A and the bracket B at intervals of approximately 90 degrees (for example, Patent Documents). 2).

特開2001−153097号公報JP 2001-153097 A 特開2000−14070号公報JP 2000-14070 A

特許文献1の構成では、ブラケットAとブラケットBとの結合部をブリッジ状の両端に配置することで帯状の形状とし材料費の削減を可能としている。しかしながら、ブラケットAの中央の軸受保持部に保持され回転軸に取り付けられる回転ファンの持つアンバランスにより、ブラケットAは径方向に振れが生じる。横断部の方向に対しては剛性が確保されているので振れを抑制することが出来るが、横断方向と略90度方向には振れが大きくなり、電動機の振動が大きくなるという課題を有していた。   In the configuration of Patent Document 1, a joint portion between the bracket A and the bracket B is disposed at both ends of the bridge shape to form a strip shape, thereby reducing the material cost. However, due to the unbalance of the rotary fan that is held by the center bearing holder of the bracket A and attached to the rotary shaft, the bracket A is shaken in the radial direction. Since the rigidity is ensured with respect to the direction of the crossing portion, the vibration can be suppressed, but there is a problem that the vibration becomes large in the transverse direction and the direction of about 90 degrees, and the vibration of the motor becomes large. It was.

特許文献第2の構成では、略90度間隔に配置された結合部により回転ファンの持つアンバランスによる径方向の振れを抑制することが出来る。しかしながら、ブラケットAの中央の軸受保持部と結合部の間は湾曲したブリッジ状になっているため、径方向のアンバランス荷重によりブリッジ状部分は歪みが生じやすく、電動機の振動が大きくなるという課題を有していた。   In the second configuration of Patent Literature 2, the vibrations in the radial direction due to the imbalance of the rotating fan can be suppressed by the coupling portions arranged at intervals of approximately 90 degrees. However, since the bridge between the bearing holding portion and the coupling portion in the center of the bracket A has a curved bridge shape, the bridge portion is likely to be distorted due to the radial unbalance load, and the vibration of the motor increases. Had.

本発明は、前記従来の課題を解決するもので、回転ファンの持つアンバランス荷重による振れ、歪みを抑制するとともに、送風性能の良いブラケット構造を有する電動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 object of the present invention is to provide an electric motor having a bracket structure with good blowing performance while suppressing vibration and distortion due to an unbalanced load of a rotary fan.

前記従来の課題を解決するために、本発明の電動機は、環状壁の一端側を開口し他端側に底壁を有する有底筒状に形成されたブラケットBと、軸受保持部と腕状のブリッジ部を有するブラケットAを結合し、その結合した内部に界磁鉄心と、一対の軸受で保持される電機子とを配置した電動送風機であって、前記ブラケットAと前記ブラケットBを結合する一対の結合部を結ぶ投影線上に、ブラケットAのブリッジ部が位置するようにし、かつ前記結合部の近傍に前記界磁鉄心の外周角部が位置するように構成している。   In order to solve the above-described conventional problems, an electric motor of the present invention includes a bracket B formed in a bottomed cylindrical shape having an opening at one end of an annular wall and a bottom wall at the other end, a bearing holding portion, and an arm shape. An electric blower in which a bracket A having a bridge portion is coupled and a field core and an armature held by a pair of bearings are disposed in the coupled interior, and the bracket A and the bracket B are coupled to each other. The bridge portion of the bracket A is positioned on the projection line connecting the pair of connecting portions, and the outer peripheral corner portion of the field core is positioned in the vicinity of the connecting portion.

こ構成によれば、一対の結合部を結ぶ投影線上にブラケットAのブリッジ部が位置するので、特許文献2のようなブラケットAの開口がなく剛性が高くなる。さらに結合部の近傍に重量の重い界磁鉄心を配置しているため、軸受保持部の保持強度が強くなり、電機子回転危険速度を高くすることが出来るため、高速運転時の振動増加を抑制することが出来る。   According to this configuration, since the bridge portion of the bracket A is positioned on the projection line connecting the pair of coupling portions, there is no opening of the bracket A as in Patent Document 2, and the rigidity is increased. In addition, a heavy field iron core is placed near the joint, which increases the holding strength of the bearing holder and increases the critical armature rotation speed, thus suppressing an increase in vibration during high-speed operation. I can do it.

本発明によれば、一対のブラケットの剛性強度が強くなり、電機子の高速運転時の振動増加を抑制することが出来る。また、通風路を遮蔽することなく空気流を均等化することにより、通風損失の少ない電動送風機を得ることが出来る。   According to the present invention, the rigidity strength of the pair of brackets is increased, and an increase in vibration during high-speed operation of the armature can be suppressed. In addition, by equalizing the air flow without shielding the ventilation path, an electric blower with less ventilation loss can be obtained.

本発明の実施形態1における電動送風機の半断面の側面図The side view of the half cross section of the electric blower in Embodiment 1 of this invention 同電動送風機の回転ファンなどを削除してブラケットA側から見た正面図Front view from the bracket A side with the rotating fan of the electric blower removed

第1の発明は、環状壁の一端側を開口し他端側に底壁を有する有底筒状に形成されたブラケットBと、軸受保持部と腕状のブリッジ部を有するブラケットAを結合し、その結合した内部に界磁鉄心と、一対の軸受で保持される電機子とを配置した電動送風機であって、前記ブラケットAと前記ブラケットBを結合する一対の結合部を結ぶ投影線上に、ブラケットAのブリッジ部が位置するようにし、かつ前記結合部の近傍に前記界磁鉄心の外周角部が位置するようにしたことを特徴とする。これにより剛性強度が強くなり高速運転時の振動増加を抑制することが出来る。   In the first invention, a bracket B formed in a bottomed cylindrical shape having an opening at one end of an annular wall and a bottom wall at the other end is coupled to a bracket A having a bearing holding portion and an arm-shaped bridge portion. , An electric blower in which a field core and an armature held by a pair of bearings are arranged in the coupled interior, on a projection line connecting a pair of coupling portions coupling the bracket A and the bracket B, The bridge portion of the bracket A is positioned, and the outer peripheral corner portion of the field core is positioned in the vicinity of the coupling portion. As a result, the rigidity strength is increased and an increase in vibration during high-speed operation can be suppressed.

第2の発明は、前記ブラケットAの反界磁鉄心側に回転ファンおよびエアガイドを備え、前記ブリッジ部には、一対の結合部から軸受保持部に沿ってエアガイド側に突出する補強リブを備えたことことを特徴とする。これによりさらに剛性強度が強くなり高速運転時の振動増加を抑制することが出来る。   According to a second aspect of the present invention, the bracket A includes a rotating fan and an air guide on the opposite magnetic core side of the bracket A, and the bridge portion includes a reinforcing rib protruding from the pair of coupling portions toward the air guide along the bearing holding portion. It is characterized by having provided. This further increases the rigidity and suppresses the increase in vibration during high-speed operation.

第3の発明は、前記ブリッジ部の外周側近傍に複数の通風孔を備えたことを特徴とする。これにより通風路を遮蔽することなく空気流を均等化することにより、通風損失の少ない電動送風機を得ることが出来る。   The third invention is characterized in that a plurality of ventilation holes are provided in the vicinity of the outer peripheral side of the bridge portion. Thus, by equalizing the air flow without shielding the ventilation path, an electric blower with less ventilation loss can be obtained.

(実施の形態)
以下、本発明の電動送風機の実施形態を図1および図2で説明する。図1は本発明の実施形態1における電動送風機の側面図であり、上半分を断面している。図2は同電動送風機の正面図であり、回転ファンやエアガイドなどを削除して、ブラケットA側から見た図である。
(Embodiment)
Hereinafter, embodiments of the electric blower of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view of the electric blower according to Embodiment 1 of the present invention, and shows a cross section of the upper half. FIG. 2 is a front view of the electric blower, as seen from the bracket A side, with the rotating fan, air guide, etc. removed.

図1、図2に示すように、有底筒状に形成されたブラケットB2と、ブラケットB2との結合部3を有し、円周平面部7と共に中央には軸受保持部4を配置した一対のブリッジ部8を有するブラケットA1が、ブラケットB2の開口側に結合されている。   As shown in FIGS. 1 and 2, a pair having a bracket B <b> 2 formed in a cylindrical shape with a bottom and a coupling portion 3 between the bracket B <b> 2, and a bearing holding portion 4 disposed in the center together with a circumferential plane portion 7. The bracket A1 having the bridge portion 8 is coupled to the opening side of the bracket B2.

互いに対向する一対の磁極を有し略方形状に形成された界磁鉄心11と、この界磁鉄心11に巻装された界磁巻線12とからなる界磁13がブラケットB2内に収納されている。界磁鉄心11の角部外周は、ブラケットB2の内周面に圧入されている。   A field magnet 13 including a field iron core 11 having a pair of magnetic poles opposed to each other and formed in a substantially rectangular shape and a field winding 12 wound around the field iron core 11 is accommodated in the bracket B2. ing. The outer periphery of the corner of the field iron core 11 is press-fitted into the inner peripheral surface of the bracket B2.

ブラケットB2の底壁およびブラケットA1に設けられた軸受9に、回転軸5を支持されて界磁13の磁極間に配置された電機子14がささえられている。   An armature 14 is supported between the bottom wall of the bracket B2 and the bearing 9 provided on the bracket A1 so as to support the rotating shaft 5 and is disposed between the magnetic poles of the field magnet 13.

ブラケットB2の開口側に設けられ回転軸5の一端に回転ファン6が取り付けられ、回転ファン6の下流側にエアガイド10が配置され、回転ファン6およびエアガイド10を覆い、吸入口を有するファンケース16がブラケットA1に取り付けられている。   A rotating fan 6 is attached to one end of the rotating shaft 5 provided on the opening side of the bracket B2, an air guide 10 is disposed on the downstream side of the rotating fan 6, covers the rotating fan 6 and the air guide 10, and has a suction port. Case 16 is attached to bracket A1.

電機子14の回転軸5に固定された回転ファン6の回転によって、ファンケース16の吸入口から吸引された空気流がエアガイド10とブラケットA1の円周平面部7に沿って形成される通風路に通じてブラケットB2の排出口へ流出させる。   By the rotation of the rotary fan 6 fixed to the rotary shaft 5 of the armature 14, the air flow sucked from the suction port of the fan case 16 is formed along the air guide 10 and the circumferential flat portion 7 of the bracket A1. It leads to the discharge port of bracket B2 through the road.

ここで、ブラケットA1とブラケットB2とは、一対の結合部3aと、その一対の結合部3aから約90度回転した位置にある他の一対の結合部3bにより、かしめにて結合されている。   Here, the bracket A1 and the bracket B2 are coupled by caulking by a pair of coupling portions 3a and another pair of coupling portions 3b at a position rotated about 90 degrees from the pair of coupling portions 3a.

一対の結合部3aを結ぶ投影線上に、ブラケットA1のブリッジ部8が位置する関係になっており、軸受保持部4以外の開口は設けられていない。他の一対の結合部3bを結ぶ投影線上には、通風路形成や界磁巻線12との絶縁確保の為の開口部が配置されており、界磁巻線12近辺ではエアガイド10側に突出した補強リブ17を有している。   The bridge portion 8 of the bracket A1 is positioned on the projection line connecting the pair of coupling portions 3a, and no opening other than the bearing holding portion 4 is provided. On the projection line connecting the other pair of coupling portions 3 b, an opening for forming a ventilation path and ensuring insulation from the field winding 12 is arranged, and near the field winding 12 on the air guide 10 side. A protruding reinforcing rib 17 is provided.

上記構成により、軸受保持部4の保持強度が強くなり回転軸5の危険速度を高くすることが出来るため、高速運転時の振動増加が少ない電動送風機が得られる。   With the above configuration, the holding strength of the bearing holding portion 4 is increased, and the critical speed of the rotating shaft 5 can be increased, so that an electric blower with little increase in vibration during high-speed operation can be obtained.

またブラケットA1のブリッジ部8と円周平面部7との連結近辺、すなわちブリッジ部8の外周面側に複数の通風孔18が設けられている。これによりファンケース16の吸入口から吸引された空気流がエアガイド10とブラケットA1の円周平面部7に沿って形成される通風路に通じてブラケットB2へ流入する際、遮断する領域がなくなり、均等に流入することが出来、送風性能の損失を少なくすることが出来る。   A plurality of ventilation holes 18 are provided in the vicinity of the connection between the bridge portion 8 and the circumferential flat surface portion 7 of the bracket A1, that is, on the outer peripheral surface side of the bridge portion 8. As a result, when the air flow sucked from the suction port of the fan case 16 flows into the bracket B2 through the air guide 10 and the ventilation path formed along the circumferential plane portion 7 of the bracket A1, there is no area to be blocked. , Can flow evenly, and can reduce the loss of blowing performance.

なお上記実施形態は前記に限定されるものではなく、例えば、ブラケットA1とブラケットB2とはネジ締結によって結合されていても良い。   In addition, the said embodiment is not limited to the above, For example, bracket A1 and bracket B2 may be couple | bonded by screw fastening.

以上のように本発明によれば、高速回転をしても、振動が小さく信頼性が高く、送風性能の高い電動送風機を提供することができるので、電気掃除機などの家庭用電気機器や設備機器などに適用可能である。   As described above, according to the present invention, it is possible to provide an electric blower that has low vibration, high reliability, and high blowing performance even when rotating at high speed. It can be applied to equipment.

1 ブラケットA
2 ブラケットB
3a、3b 結合部
4 軸受保持部
5 回転軸
7 円周平面部
8 ブリッジ部
9 軸受
10 エアガイド
11 界磁鉄心
12 界磁巻線
13 界磁
14 電機子
17 補強リブ
18 通風孔
1 Bracket A
2 Bracket B
3a, 3b Coupling part 4 Bearing holding part 5 Rotating shaft 7 Circumferential plane part 8 Bridge part 9 Bearing 10 Air guide 11 Field core 12 Field winding 13 Field 14 Armature 17 Reinforcement rib 18 Ventilation hole

Claims (3)

環状壁の一端側を開口し他端側に底壁を有する有底筒状に形成されたブラケットBと、軸受保持部と腕状のブリッジ部を有するブラケットAを結合し、その結合した内部に界磁鉄心と、一対の軸受で保持される電機子とを配置した電動送風機であって、
前記ブラケットAと前記ブラケットBを結合する一対の結合部を結ぶ投影線上に、ブラケットAのブリッジ部が位置するようにし、かつ前記結合部の近傍に前記界磁鉄心の外周角部が位置するようにした電動送風機。
A bracket B formed in a bottomed cylindrical shape having an opening at one end of the annular wall and having a bottom wall at the other end is coupled to a bracket A having a bearing holding portion and an arm-shaped bridge portion. An electric blower in which a field core and an armature held by a pair of bearings are arranged,
A bridge portion of the bracket A is positioned on a projection line connecting a pair of connecting portions that connect the bracket A and the bracket B, and an outer peripheral corner portion of the field core is positioned in the vicinity of the connecting portion. An electric blower.
前記ブラケットAの反界磁鉄心側に回転ファンおよびエアガイドを備え、前記ブリッジ部には、一対の結合部から軸受保持部に沿ってエアガイド側に突出する補強リブを備えたことことを特徴とする請求項1に記載の電動送風機。 The bracket A includes a rotating fan and an air guide on the opposite magnetic core side, and the bridge portion includes a reinforcing rib protruding from the pair of coupling portions to the air guide side along the bearing holding portion. The electric blower according to claim 1. 前記ブリッジ部の外周側近傍に複数の通風孔を備えたことを特徴とする請求項1または2に記載の電動送風機。 The electric blower according to claim 1, wherein a plurality of ventilation holes are provided in the vicinity of the outer peripheral side of the bridge portion.
JP2011226429A 2011-10-14 2011-10-14 Electric blower Pending JP2013087640A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02139400U (en) * 1989-04-27 1990-11-21
JP2004060594A (en) * 2002-07-31 2004-02-26 Sanyo Electric Co Ltd Electric blower
JP2004204764A (en) * 2002-12-25 2004-07-22 Toshiba Tec Corp Electric blower
JP2005137064A (en) * 2003-10-28 2005-05-26 Toshiba Tec Corp Motor driven blower and vacuum cleaner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02139400U (en) * 1989-04-27 1990-11-21
JP2004060594A (en) * 2002-07-31 2004-02-26 Sanyo Electric Co Ltd Electric blower
JP2004204764A (en) * 2002-12-25 2004-07-22 Toshiba Tec Corp Electric blower
JP2005137064A (en) * 2003-10-28 2005-05-26 Toshiba Tec Corp Motor driven blower and vacuum cleaner

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