JP2010239744A - Motor - Google Patents

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JP2010239744A
JP2010239744A JP2009084310A JP2009084310A JP2010239744A JP 2010239744 A JP2010239744 A JP 2010239744A JP 2009084310 A JP2009084310 A JP 2009084310A JP 2009084310 A JP2009084310 A JP 2009084310A JP 2010239744 A JP2010239744 A JP 2010239744A
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terminal box
fan
electric motor
wind
fan cover
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JP5209561B2 (en
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Ryohei Zeisho
亮平 税所
Koichiro Ohara
光一郎 大原
Masashi Fujitake
雅志 藤嶽
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Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor cooling inside a terminal box by wind of a fan for cooling a motor body. <P>SOLUTION: A shape of a fan cover 3 or the terminal box 5 is improved. Thus, the terminal box 5 is cooled by wind Fa for cooling a motor. A gap (including 10z) is provided between a side (including 5z) of the terminal box 5 and the fan cover 3. Wind Fa from the fan 4 is discharged via the gap, wind is applied to the side of the terminal box 5 and the terminal box 5 is cooled from a surface thereof. Further, by providing an entrance port and an exhaust port on a lower surface of the terminal box 5, wind can be taken from the fan 4 into the terminal box via the entrance port to be discharged from the exhaust port, the inside of the terminal box 5 can directly be cooled. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、サーボアンプやインバータで駆動される電動機に関し、特に、空冷構造を備えた大容量の電動機に関する。   The present invention relates to an electric motor driven by a servo amplifier or an inverter, and more particularly to a large capacity electric motor having an air cooling structure.

サーボアンプやインバータ等で駆動される回転電機としてのモータは、例えば、プレス装置の金型駆動用モータや、射出成形機の樹脂射出用ポンプの駆動モータのように、各産業分野において広汎に用いられている。これらの装置は大型化すると、使用されるモータも大型モータとなるが、使用中に大きな電流が流れるモータ本体からはジュール熱として多量の熱が発生し、モータの特性に熱による影響が生じる場合もある。それゆえ、モータを利用する上でモータの冷却を考察することは非常に重要なことである。   Motors as rotating electrical machines driven by servo amplifiers, inverters, etc. are widely used in various industrial fields, for example, a mold drive motor for press machines and a resin injection pump drive motor for injection molding machines. It has been. When these devices are increased in size, the motor used will also be a large motor, but a large amount of heat is generated as Joule heat from the motor body through which a large current flows during use, and the motor characteristics are affected by heat. There is also. Therefore, it is very important to consider motor cooling in using the motor.

従来、モータ本体から発生した熱の放熱対策の一つとして、モータ本体で発生した熱を端子箱に伝達することで熱放射表面積を拡大し、当該拡大された熱放射表面積から放熱させることで冷却効果を向上させた冷却構造が知られている（例えば、特許文献１参照）。この冷却構造においては、端子箱にフィンを取り付け、当該フィンをファンモータユニットのケーシング内に突出させており、ファンによる風をフィンに当てることにより、フィンから熱を奪って端子箱を更に冷却し、端子箱内に設置された電子部品が高温になるのを防止することができる。   Conventionally, as one of the heat dissipation measures for the heat generated from the motor body, the heat radiation surface area is expanded by transferring the heat generated by the motor body to the terminal box, and the heat radiation surface area is cooled by dissipating the heat radiation surface area. A cooling structure with an improved effect is known (for example, see Patent Document 1). In this cooling structure, fins are attached to the terminal box, the fins are projected into the casing of the fan motor unit, and the terminal box is further cooled by removing heat from the fins by applying wind from the fan to the fins. The electronic components installed in the terminal box can be prevented from becoming high temperature.

また、電動機と一体型にされる制御装置に加わる振動を抑制し、かつ、制御装置の温度を許容値以下に維持することを図った車両用駆動装置が提案されている（特許文献２参照）。この車両用駆動装置は、電動機本体の密閉されたケース外方で回転軸の端部に冷却ファンを取り付け、ケースには冷却ファンを覆うファンカバーを取り付け、電動機本体に電力を供給する制御装置をケース外面又はファンカバーに防振部材を介して支持し、制御装置に対向してヒートシンクを設けて構成されており、制御装置と電動機とを一体型にした場合でも、制御装置に加わる振動を抑制し、且つ制御装置の温度を許容値以下に維持することを図っている。制御装置をファンカバーに直接密着している場合、制御装置で発生した熱が放熱面積の広いファンカバーに伝導し、さらに放熱効果を高めることができ、冷却性能を向上させることができる。   Further, there has been proposed a vehicle drive device that suppresses vibration applied to a control device integrated with an electric motor and maintains the temperature of the control device below an allowable value (see Patent Document 2). . This vehicle drive device includes a control device that attaches a cooling fan to the end of the rotating shaft outside the sealed case of the motor body, attaches a fan cover that covers the cooling fan to the case, and supplies power to the motor body. It is supported on the outer surface of the case or on the fan cover via a vibration isolator and is provided with a heat sink facing the control device, suppressing vibration applied to the control device even when the control device and the motor are integrated. In addition, the temperature of the control device is maintained below an allowable value. When the control device is in direct contact with the fan cover, the heat generated in the control device is conducted to the fan cover having a large heat radiation area, so that the heat radiation effect can be further enhanced and the cooling performance can be improved.

ところで、上記特許文献１に記載の技術では、端子箱に設けたフィンにより端子箱の熱を逃がす構造であるため、フィン部分において構造が複雑となってしまう問題がある。
また、特許文献２に記載の技術では、制御装置とファンカバーとの間にファンから送風された冷却空気を流しているだけであるので、制御装置の十分な冷却効果が得られず、制御装置の内部までをも効率的に冷却することができない。 By the way, in the technique of the said patent document 1, since it is the structure which releases the heat of a terminal box with the fin provided in the terminal box, there exists a problem that a structure will become complicated in a fin part.
Moreover, in the technique described in Patent Document 2, since only the cooling air blown from the fan is allowed to flow between the control device and the fan cover, a sufficient cooling effect of the control device cannot be obtained. Even the inside cannot be cooled efficiently.

特開２００５−９４９４９号公報JP 2005-94949 A 特開２００９−２７８６３号公報JP 2009-27863 A

端子箱の内部には大きな電流が流れる導線とそれに接続される端子が収容されており、大容量のモータを使用する場合、端子箱内に配線されている動力線からジュール熱によって発生する熱量が多くなるのに対して、端子箱は密閉されているため、端子箱の温度が上昇してしまうという問題がある。
そこで、モータ本体に端子箱を備えた電動機において、端子箱の内部が、配線されている動力線から生じるジュール熱によって高温になるのをより簡単な構造で防止する点で解決すべき課題がある。
本発明の目的は、かかる問題を解消し、モータ冷却用のファンの風を利用して端子箱内の冷却が可能な電動機を提供することにある。 The inside of the terminal box contains a conducting wire through which a large current flows and a terminal connected to it. When a large capacity motor is used, the amount of heat generated by Joule heat from the power line wired in the terminal box is reduced. On the other hand, since the terminal box is sealed, there is a problem that the temperature of the terminal box rises.
Therefore, in an electric motor provided with a terminal box in the motor body, there is a problem to be solved in terms of preventing the inside of the terminal box from becoming high temperature due to Joule heat generated from the wired power line with a simpler structure. .
An object of the present invention is to provide an electric motor that can solve such problems and can cool the inside of a terminal box by using the wind of a fan for cooling a motor.

上記の問題を解決するために、本発明による電動機は、モータ本体と、前記モータ本体を覆うファンカバーと、前記モータ本体又は前記ファンカバーに設置されたファンと、前記モータ本体又は前記ファンカバーに設置された端子箱と、を備え、前記モータ本体と前記ファンカバーとの間の隙間を流れる前記ファンの風を利用して前記端子箱を冷却することを特徴としている。   In order to solve the above problems, an electric motor according to the present invention includes a motor main body, a fan cover covering the motor main body, a fan installed in the motor main body or the fan cover, and the motor main body or the fan cover. And a terminal box installed, and the terminal box is cooled by using the wind of the fan flowing through the gap between the motor body and the fan cover.

この電動機によれば、モータ本体又はファンカバーに設置されたファンは、モータ本体とファンカバーとの間の隙間に冷却用の空気を送り込んで、モータ本体の表面を流れる空気によってモータ本体を冷却する。同時に、その空気の流れは、一部が端子箱に送り込まれることによって端子箱に流れ、端子箱を効果的に冷却することができる。   According to this electric motor, the fan installed in the motor main body or the fan cover sends cooling air into the gap between the motor main body and the fan cover, and cools the motor main body with the air flowing on the surface of the motor main body. . At the same time, a part of the air flow is sent to the terminal box by being sent to the terminal box, and the terminal box can be effectively cooled.

また、本発明による電動機はファンからの風を端子箱側面に吹き付けることができる
また、本発明による電動機は、端子箱の下面にファンから送られる風の進入口と排気口を設け、ファンからの風を進入口を通して端子箱内に取り入れ、端子箱内の空気を排気口を通して排気することができる。
また、端子箱内を冷却する電動機において、ファンカバー及び端子箱のどちらか一方又は双方に遮蔽板を設けて、遮蔽板によって空気を端子箱内に誘導することができる。
更に、本発明による電動機は、ファンカバー、端子箱及びファンの少なくとも一つにフィルタを設けて、端子箱内へ粉塵・油等の異物の侵入を防止することができる。 In addition, the electric motor according to the present invention can blow the wind from the fan to the side of the terminal box. The electric motor according to the present invention is provided with an inlet and an exhaust port for the wind sent from the fan on the lower surface of the terminal box. Wind can be taken into the terminal box through the entrance and the air in the terminal box can be exhausted through the exhaust port.
Moreover, in the electric motor that cools the inside of the terminal box, a shield plate is provided on one or both of the fan cover and the terminal box, and air can be guided into the terminal box by the shield plate.
Furthermore, the electric motor according to the present invention can be provided with a filter in at least one of the fan cover, the terminal box, and the fan to prevent foreign matters such as dust and oil from entering the terminal box.

本発明の電動機によれば、端子箱にフィンを設けなくても、モータ本体又はファンカバーに設置されたファンから送られる風を端子箱の表面に流して端子箱自体を冷却することができる。また、端子箱下面に端子箱内への風の進入口と排気口を設けることで、ファンから送られる風を端子箱内部に流すこともできる。また、ファンカバー及び端子箱のどちらか一方、又は双方に遮蔽板を設けることで、風を端子箱又は端子箱内部へ導くことができ、更にファンカバー、端子箱及びファンの少なくとも一つにフィルタを設けることで、粉塵・油当の端子箱内部への侵入を防ぐことができる。これらより、端子箱内部の冷却が可能となる電動機を提供することができる。   According to the electric motor of the present invention, it is possible to cool the terminal box itself by flowing air sent from the fan installed on the motor body or the fan cover to the surface of the terminal box, without providing the terminal box with fins. Moreover, the wind sent from a fan can also be flowed in the inside of a terminal box by providing the entrance and exhaust port of the wind into a terminal box in the terminal box lower surface. Further, by providing a shielding plate on one or both of the fan cover and the terminal box, the wind can be guided to the inside of the terminal box or the terminal box, and further, a filter is provided on at least one of the fan cover, the terminal box and the fan. By providing, it is possible to prevent dust and oil from entering the terminal box. Thus, an electric motor that can cool the inside of the terminal box can be provided.

図１は本発明による電動機の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of an electric motor according to the present invention. 図２は図１のＸ−Ｙ断面図である。2 is an XY cross-sectional view of FIG. 図３は本発明による電動機の別の実施例を示す斜視図である。FIG. 3 is a perspective view showing another embodiment of the electric motor according to the present invention. 図４は図２のＸ−Ｙ断面図である。4 is an XY cross-sectional view of FIG. 図５は図３に示す電動機の端子箱を含む要部の拡大斜視図である。FIG. 5 is an enlarged perspective view of a main part including a terminal box of the electric motor shown in FIG. 図６は図２に示す電動機の端子箱を含む要部における流体解析図である。FIG. 6 is a fluid analysis diagram in a main part including the terminal box of the electric motor shown in FIG. 図７は本発明による電動機の別の実施例におけるファンの部分を示す斜視図である。FIG. 7 is a perspective view showing a fan portion in another embodiment of the electric motor according to the present invention.

図１及び図２は、本発明による電動機の一実施形態を示す図であり、図１は本発明による電動機の斜視図、図２は図１に示す電動機の縦断面図である。図１に示す実施形態は、端子箱５の側面とファンカバー３との間に隙間を設け、ファン４より送り込まれた風をモータ本体２に表面とファンカバー３の間に形成されている隙間に通し、この風を端子箱５とファンカバー３との間に形成される開口１０から放出させることで、端子箱５の側面を冷却する冷却構造を備えている。   1 and 2 are views showing an embodiment of an electric motor according to the present invention. FIG. 1 is a perspective view of the electric motor according to the present invention, and FIG. 2 is a longitudinal sectional view of the electric motor shown in FIG. In the embodiment shown in FIG. 1, a gap is provided between the side surface of the terminal box 5 and the fan cover 3, and the air sent from the fan 4 is formed in the motor body 2 between the surface and the fan cover 3. And a cooling structure for cooling the side surface of the terminal box 5 by discharging the wind from the opening 10 formed between the terminal box 5 and the fan cover 3.

詳述すると、図１に示す電動機は、出力軸としてのシャフト１がモータ本体２から突出する態様で設けられており、ファンカバー３がモータ本体２の大部分を覆うように配設されている。ファンカバー３には、外気を吸い込むことができるファン４が取り付けられている。ファン４はモータ本体２の図示した側面のファンの他に、モータ本体２の反対側の側面にも設けられている。Ｆａは、ファン４によって矢印の向きに示すように内向きに吸い込まれる風を示している。なお、ファン４については、ファンカバー３に配設した例を示したが、ファンカバー３に代えてモータ本体２に配設することもできる。   More specifically, the electric motor shown in FIG. 1 is provided in such a manner that a shaft 1 as an output shaft protrudes from a motor body 2, and a fan cover 3 is disposed so as to cover most of the motor body 2. . A fan 4 that can suck in outside air is attached to the fan cover 3. The fan 4 is provided on the opposite side surface of the motor body 2 in addition to the illustrated fan on the side surface of the motor body 2. Fa indicates the wind sucked inward by the fan 4 as indicated by the direction of the arrow. In addition, although the example which has arrange | positioned the fan 4 in the fan cover 3 was shown, it can replace with the fan cover 3 and can also be arrange | positioned in the motor main body 2. FIG.

ファンカバー３は、モータ本体２に対してモータ本体２の表面との間に隙間を確保して取り付けられており、ファン４の風向を図示Ｆａのように内向きに吸い込む流れとすることで、モータ本体２とファンカバー３の間の隙間には、図中で破線で示すように万遍なく風が流れる。ファン４で吸い込まれた外気は、モータ本体２の側面では、ファンカバー３との間のＸ−Ｙ面に平行に広がる隙間に沿って流れ、一部はＸ軸方向前後の隙間端部の隙間開口から流出し、残る部分はモータ本体２の天面と底面とにおいてファンカバー３との間のＸ−Ｚ面に平行に広がる隙間に沿って流れる。反対側の側面に配設されているファンからの風が対称的に流れるので、モータ本体２の天面と底面とにおいては、それらの中央領域で両側（Ｚ軸方向）からの風がＸ軸上で衝突し、Ｘ軸と平行な向きに流れが変わり、シャフト１方向と平行な方向（Ｘ軸方向）に流れてＸ軸方向に延びる隙間開口から流出する。   The fan cover 3 is attached to the motor body 2 with a clearance between the surface of the motor body 2 and the air direction of the fan 4 is drawn inward as shown in the figure Fa. Wind flows uniformly through the gap between the motor body 2 and the fan cover 3 as shown by broken lines in the figure. The outside air sucked in by the fan 4 flows along the gap extending in parallel with the XY plane between the fan main body 2 and the side surface of the motor body 2, and a part of the gap is at the gap end portions before and after the X-axis direction. The remaining portion flows out from the opening and flows along a gap extending in parallel with the XZ plane between the top surface and the bottom surface of the motor body 2 and the fan cover 3. Since the wind from the fan disposed on the opposite side surface flows symmetrically, the wind from both sides (Z-axis direction) of the top surface and the bottom surface of the motor body 2 in the central region is the X axis. Colliding above, the flow changes in a direction parallel to the X axis, flows in a direction parallel to the direction of the shaft 1 (X axis direction), and flows out from a gap opening extending in the X axis direction.

モータ本体２の頂面の一部には、端子箱５が取り付けられている。ファンカバー３は、端子箱５が取り付けられている領域では凹部３ａに切り欠かれており、端子箱５の周囲において冷却風が吹き出すことができる若干の隙間開口１０（後述するように、１０ｘ，１０ｚとから成る）が形成されている。端子箱５の側面５ｚについては、ファンカバー３との間に形成されている隙間開口１０ｚから冷却風が吹き出し、吹き出した冷却風は当該側面５ｚに沿って流れて当該側面５ｚを冷却する。   A terminal box 5 is attached to a part of the top surface of the motor body 2. The fan cover 3 is notched in the recess 3a in the region where the terminal box 5 is attached, and a slight gap opening 10 (10x, 10z). As for the side surface 5z of the terminal box 5, cooling air blows out from the gap opening 10z formed between the terminal box 5 and the blown cooling air flows along the side surface 5z to cool the side surface 5z.

図１のＸ−Ｙ断面図である図２に示すように、Ｙ−Ｚ軸に平行な端子箱５の前面５ｘの冷却に関しても冷却が可能となる。モータ本体２の天面とファンカバー３との間に流れる風は、一部が端子箱５との間の隙間開口１０ｘから空気流れＦａで示すように端子箱５の前面５ｘに沿って流れ、当該前面５ｘを冷却する。なお、図２には、モータ本体２の底面とファンカバー３との間に流れてモータ本体２の底面を冷却する空気流れＦａも示している。図１及び図２に示したように、ファンカバー３、又は端子箱５の形状を改良することにより、ファン４によって送り込まれるモータ空冷用の風を利用して、端子箱５を冷却することができる。   As shown in FIG. 2 which is an XY cross-sectional view of FIG. 1, cooling is also possible with respect to cooling of the front surface 5x of the terminal box 5 parallel to the YZ axis. A part of the wind flowing between the top surface of the motor body 2 and the fan cover 3 flows along the front surface 5x of the terminal box 5 as indicated by the air flow Fa from the gap opening 10x between the motor box 2 and the terminal box 5, The front surface 5x is cooled. FIG. 2 also shows an air flow Fa that flows between the bottom surface of the motor body 2 and the fan cover 3 to cool the bottom surface of the motor body 2. As shown in FIGS. 1 and 2, by improving the shape of the fan cover 3 or the terminal box 5, the terminal box 5 can be cooled using the air for cooling the motor sent by the fan 4. it can.

また、モータ本体２の天面に位置する端子箱５は、モータ本体２の両側面に設けられるファン４よりもＸ軸方向において位置をずらして配置されている。本実施例では、モータ本体２の側面のほぼ中央部にファン４が配置され、端子箱５はモータ本体２の天面において、シャフト１から遠い位置に配置されている。すなわち、ファン４の対向位置と端子箱５はＸ軸方向位置が異なる配置となっている。
この配置により、モータ本体２の天面において、Ｚ軸方向の中央部分で両側のファン４から送られる冷却風が合流し、Ｘ軸方向に流れを変えることができる。このため、端子箱５の冷却のために開口１０から冷却風が流出する前に、モータ本体２の冷却を十分に行うことができる。したがって、モータ本体２とファンカバー３との隙間に十分に冷却風が流れた後に、端子箱５の冷却が可能となり、モータの冷却と端子箱５の冷却を効果的に行うことができる。 Further, the terminal box 5 located on the top surface of the motor body 2 is arranged with a position shifted in the X-axis direction from the fans 4 provided on both side surfaces of the motor body 2. In the present embodiment, the fan 4 is disposed substantially at the center of the side surface of the motor body 2, and the terminal box 5 is disposed at a position far from the shaft 1 on the top surface of the motor body 2. That is, the opposing position of the fan 4 and the terminal box 5 are arranged in different positions in the X-axis direction.
With this arrangement, on the top surface of the motor main body 2, the cooling air sent from the fans 4 on both sides is joined at the central portion in the Z-axis direction, and the flow can be changed in the X-axis direction. For this reason, the motor main body 2 can be sufficiently cooled before the cooling air flows out from the opening 10 for cooling the terminal box 5. Therefore, after the cooling air sufficiently flows through the gap between the motor body 2 and the fan cover 3, the terminal box 5 can be cooled, and the motor and the terminal box 5 can be cooled effectively.

図３〜図５は、本発明による電動機の別の実施形態を示す図であり、図３は本発明による電動機の斜視図、図４は図３に示す電動機のＸ−Ｙ断面図、図５は図３に示す電動機の端子箱のところで切断した要部の拡大斜視図である。図３〜図５に示す実施形態は、端子箱５をファンカバー３に取り付け、モータ４から送り込まれた風をモータ本体２の表面とファンカバー３の間に形成されている隙間に通し、この風を端子箱５の内部に誘導することで端子箱５の内部を冷却する冷却構造を備えている。その他の構造は図１に示す電動機と同様であるので、共通する構造については再度の説明を省略する。   3 to 5 are views showing another embodiment of the electric motor according to the present invention, FIG. 3 is a perspective view of the electric motor according to the present invention, FIG. 4 is an XY sectional view of the electric motor shown in FIG. FIG. 4 is an enlarged perspective view of a main part cut at a terminal box of the electric motor shown in FIG. 3. 3 to 5, the terminal box 5 is attached to the fan cover 3, and the wind sent from the motor 4 is passed through a gap formed between the surface of the motor body 2 and the fan cover 3. A cooling structure that cools the inside of the terminal box 5 by guiding wind into the terminal box 5 is provided. Since the other structure is the same as that of the electric motor shown in FIG. 1, the description of the common structure is omitted.

図３に示す実施態様では、図１及び図２に示す態様で採用したような端子箱５とファンカバー３との間に隙間開口は設けられていない。図４及び図５に示すように、端子箱５はその外壁がファンカバー３に連続的に接続されている。端子箱５の下部には、ファンカバー３内側の端子箱５との接続領域において、Ｘ軸方向の両端位置にそれぞれ進入口６及び排気口７が形成されている。   In the embodiment shown in FIG. 3, no gap opening is provided between the terminal box 5 and the fan cover 3 as adopted in the embodiment shown in FIGS. 1 and 2. As shown in FIGS. 4 and 5, the outer wall of the terminal box 5 is continuously connected to the fan cover 3. In the lower part of the terminal box 5, the entrance 6 and the exhaust 7 are formed at both end positions in the X-axis direction in the connection area with the terminal box 5 inside the fan cover 3.

モータ本体２の天面において、それらの中央領域でＺ軸方向両側からの風がＸ軸上で衝突し、Ｘ軸と平行な向きに流れが変わり、シャフト１方向と平行な方向（Ｘ軸方向）に流れた風は、Ｘ軸の前方向に形成されている進入口６より端子箱５内に取り込まれ、Ｘ軸の後方向に形成されている排気口７より放出される。このように、風の進入口６と排気口７とを設け、Ｘ軸と平行な向きに流れる冷却風を端子箱５内に取り入れ、冷却風が端子箱５内を流れることで、端子箱５の内部が冷却される。   On the top surface of the motor body 2, winds from both sides in the Z-axis direction collide on the X-axis in the central region, the flow changes in a direction parallel to the X-axis, and a direction parallel to the shaft 1 direction (X-axis direction). ) Is taken into the terminal box 5 from the entrance 6 formed in the forward direction of the X axis, and is discharged from the exhaust port 7 formed in the backward direction of the X axis. In this way, the wind inlet 6 and the exhaust port 7 are provided, the cooling air flowing in the direction parallel to the X axis is taken into the terminal box 5, and the cooling air flows through the terminal box 5. The inside is cooled.

図４及び図５中の符号８は、風の進入口６において端子箱５側に設けられた遮蔽板を示す。遮蔽板８を設けることで、進入口６から風を端子箱５内により多く取り込むことが可能となり、端子箱５内の冷却効果の向上が図れる。遮蔽板８については、端子箱５側ではなく、ファンカバー３側において端子箱５内に風を導くように設けることもできる。   4 and 5 indicates a shielding plate provided on the terminal box 5 side at the wind inlet 6. By providing the shielding plate 8, it becomes possible to take in more air from the entrance 6 into the terminal box 5, and the cooling effect in the terminal box 5 can be improved. The shielding plate 8 may be provided so as to guide air into the terminal box 5 not on the terminal box 5 side but on the fan cover 3 side.

ファン４の位置を端子箱５の進入口６よりも負荷側（−Ｘ方向）に配置し、尚且つモータ本体２とファンカバー３の負荷側の隙間を埋めることができる。そうした場合には、負荷側（−Ｘ方向）へ流れようとする風量が制限され、その分更に多くの風が＋Ｘ方向へ移動し、端子箱５内部への風の進入量が増加し、冷却能力を向上する。また、ファン４の出口部分、ファンカバー３及び端子箱５のいずれか又はその組み合わせにおいて、端子箱５の内部に取り入れられる風に対するフィルタを設けることができる。かかるフィルタにより、端子箱５内へ粉塵・油等の異物の侵入を防止することができる。   The position of the fan 4 can be arranged on the load side (−X direction) from the entrance 6 of the terminal box 5, and the gap on the load side between the motor body 2 and the fan cover 3 can be filled. In such a case, the amount of air that tends to flow toward the load side (−X direction) is limited, and more wind moves accordingly in the + X direction, increasing the amount of wind entering the terminal box 5 and cooling. Improve ability. In addition, a filter for wind taken into the terminal box 5 can be provided in any one or a combination of the outlet portion of the fan 4, the fan cover 3 and the terminal box 5. Such a filter can prevent foreign matter such as dust and oil from entering the terminal box 5.

図６に、例として図２の形状で流体解析を行った結果を示す。図６において、ベクトルは風向・風速を表しており、ファン４からの風が進入口６から端子箱５内へ入り、排気口７から放出しているのが分かる。この結果より、端子箱５内の冷却が可能であると言及できる。
この実施例においても、モータの冷却と端子箱５の冷却の両立を図るため、モータ本体２の天面に位置する端子箱５は、モータ本体２の両側面に設けられるファン４よりもＸ軸方向において位置をずらして配置されることが望ましい。 FIG. 6 shows a result of the fluid analysis performed in the shape of FIG. 2 as an example. In FIG. 6, the vector represents the wind direction and the wind speed, and it can be seen that the wind from the fan 4 enters the terminal box 5 from the entrance 6 and is discharged from the exhaust port 7. From this result, it can be mentioned that the inside of the terminal box 5 can be cooled.
Also in this embodiment, in order to achieve both the cooling of the motor and the cooling of the terminal box 5, the terminal box 5 located on the top surface of the motor body 2 has an X axis rather than the fans 4 provided on both side surfaces of the motor body 2. It is desirable that the positions are shifted in the direction.

図７は、この発明による電動機の更に別の実施例を示す斜視図である。この実施例は、冷却用ファン４がモータ本体２に設置された電動機を示している。ファン４は、ファンカバー３を切り欠いた切欠き部３ａにおいてモータ本体２に直接に設置されている。ファン４が引き込んだ風Ｆａは、ファンケーシング４ａに形成した切欠き４ｂを通して、ファン４の周囲においてモータ本体２の表面に沿って広がり、モータ本体２の表面とファンカバー３の内面との間に形成されている隙間に流れ込む。端子箱５への風Ｆａの送り込み等、この実施例におけるその余の構造は、図１に示す実施例の構造と同等であるので、これらに関する再度の詳細な説明を省略する。   FIG. 7 is a perspective view showing still another embodiment of the electric motor according to the present invention. This embodiment shows an electric motor in which a cooling fan 4 is installed in a motor body 2. The fan 4 is directly installed on the motor body 2 at a cutout portion 3 a obtained by cutting out the fan cover 3. The wind Fa drawn by the fan 4 extends along the surface of the motor body 2 around the fan 4 through the notch 4b formed in the fan casing 4a, and between the surface of the motor body 2 and the inner surface of the fan cover 3. It flows into the formed gap. The remaining structure in this embodiment, such as the feeding of the wind Fa to the terminal box 5, is equivalent to the structure of the embodiment shown in FIG. 1, and thus detailed description thereof will not be repeated.

本発明による電動機は、空冷を必要とする小形から大容量までのすべての電動機、あるいは回転電機に適用可能である。   The electric motor according to the present invention can be applied to all electric motors of small to large capacity that require air cooling or rotating electric machines.

１ シャフト ２ モータ本体
３ ファンカバー ３ａ 切欠き部
４ ファン ５ 端子箱
５ａ 前面 ５ｚ 側面
６ 進入口 ７ 排気口
８ 遮蔽板
１０ｘ，１０ｚ 隙間開口
Ｆａ ファンからの風 DESCRIPTION OF SYMBOLS 1 Shaft 2 Motor body 3 Fan cover 3a Notch part 4 Fan 5 Terminal box 5a Front surface 5z Side surface 6 Advance inlet 7 Exhaust port 8 Shielding board 10x, 10z Clearance opening Fa Wind from a fan

Claims (7)

モータ本体と、前記モータ本体を覆うファンカバーと、前記モータ本体又は前記ファンカバーに設置されたファンと、前記モータ本体又は前記ファンカバーに設置された端子箱と、を備え、
前記モータ本体と前記ファンカバーとの間に形成されている隙間を流れる前記ファンの風を利用して前記端子箱を冷却することを特徴とする電動機。 A motor main body, a fan cover covering the motor main body, a fan installed in the motor main body or the fan cover, and a terminal box installed in the motor main body or the fan cover,
An electric motor characterized in that the terminal box is cooled using wind of the fan flowing through a gap formed between the motor body and the fan cover. 請求項１記載の電動機において、
前記ファンから送られた前記風を前記端子箱の周面に吹き付けることで前記端子箱を外部から冷却することを特徴とする電動機。 The electric motor according to claim 1, wherein
An electric motor characterized in that the terminal box is cooled from the outside by blowing the wind sent from the fan onto the peripheral surface of the terminal box. 請求項２記載の電動機において、
前記隙間を通した風を前記端子箱の前記周面と前記ファンカバーの端部との間に形成された隙間開口を通して前記端子箱の前記周面に沿わせて流すことを特徴とする電動機。 The electric motor according to claim 2, wherein
An electric motor characterized in that the wind passing through the gap is caused to flow along the peripheral surface of the terminal box through a clearance opening formed between the peripheral surface of the terminal box and an end of the fan cover. 請求項１記載の電動機において、
前記端子箱の下面に進入口と排気口を設け、前記ファンから送られた前記風を前記進入口から前記端子箱の内部に進入させて前記排気口から排気することで前記端子箱を内部から冷却することを特徴とする電動機。 The electric motor according to claim 1, wherein
An entrance and an exhaust port are provided on the lower surface of the terminal box, and the wind sent from the fan enters the terminal box from the entrance and is exhausted from the exhaust port to exhaust the terminal box from the inside. An electric motor characterized by cooling. 請求項４記載の電動機において、
前記ファンカバー及び前記端子箱の少なくとも一方に、前記進入口に繋がって前記ファンからの風を前記端子箱の内部に向かって誘導する遮蔽板を設けたことを特徴とする電動機。 The electric motor according to claim 4, wherein
An electric motor characterized in that at least one of the fan cover and the terminal box is provided with a shielding plate that is connected to the entrance and guides the wind from the fan toward the inside of the terminal box. 請求項１記載の電動機において、
前記ファンは前記モータ本体の両側に対向するように複数設けられ、前記端子箱の位置は複数のファンが対向する位置と異なることを特徴とする電動機。 The electric motor according to claim 1, wherein
A plurality of the fans are provided so as to face both sides of the motor body, and the position of the terminal box is different from the position where the plurality of fans face each other. 請求項１〜６のいずれか一項記載の電動機において、
前記ファンカバー、前記端子箱及び前記ファンの少なくとも一つに前記端子箱の内部に流れる風のためのフィルタを設けたことを特徴とする電動機。 In the electric motor according to any one of claims 1 to 6,
At least one of the fan cover, the terminal box, and the fan is provided with a filter for air flowing inside the terminal box.
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