JPH11300656A - Cooling structure for power tool - Google Patents
Cooling structure for power toolInfo
- Publication number
- JPH11300656A JPH11300656A JP10113748A JP11374898A JPH11300656A JP H11300656 A JPH11300656 A JP H11300656A JP 10113748 A JP10113748 A JP 10113748A JP 11374898 A JP11374898 A JP 11374898A JP H11300656 A JPH11300656 A JP H11300656A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- casing
- tool housing
- exhaust
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/008—Cooling means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Portable Power Tools In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、モータ及びモータ
駆動用電子部品が発熱部材となっている電動工具の冷却
構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for a power tool in which a motor and electronic components for driving the motor are heat-generating members.
【０００２】[0002]
【従来の技術】電動ドリルドライバー等の電動工具にお
いては、モータとこのモータの駆動用の電子部品（ＦＥ
Ｔ等）とが発熱部材となっており、作業効率を高めるた
めに連続使用がなされた時、これらの冷却を効率よく行
わなければ温度上昇が著しくなって出力効率が大きく低
下する。このためにモータには遠心型の冷却ファンを内
蔵したものを用いるとともに図４に示すように工具ハウ
ジング１に通風孔１０を形成して強制冷却を図ったり、
電子部品のための冷却部材（一般には放熱板）を設けた
りしている。なお、図４中の２は冷却ファンを内蔵して
いるモータであり、放熱板及び電子部品は前端にチャッ
ク１７が配されているとともに中央部から下方に向けて
グリップ部１８が延出された工具ハウジング１の後端部
内に配されている。2. Description of the Related Art In an electric tool such as an electric drill driver, a motor and electronic parts (FE) for driving the motor are used.
T) is a heat-generating member, and when they are continuously used in order to enhance work efficiency, if these are not efficiently cooled, the temperature rise will be remarkable and the output efficiency will be greatly reduced. For this purpose, a motor having a built-in centrifugal cooling fan is used, and a ventilation hole 10 is formed in the tool housing 1 as shown in FIG.
For example, a cooling member (generally, a heat sink) for electronic components is provided. Reference numeral 2 in FIG. 4 denotes a motor having a built-in cooling fan, and a radiator plate and electronic components are provided with a chuck 17 at a front end and a grip portion 18 extending downward from a central portion. It is arranged in the rear end of the tool housing 1.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の電動工
具においては、モータの冷却にはその効果が十分に得ら
れていたが、電子部品の冷却に関しては十分ではなかっ
た。すなわち、冷却のために放熱板が電子部品に取りつ
けられていたが、電動工具、殊に携帯型の電動工具にお
いては、小型化が図られた工具ハウジング内の狭くて熱
がこもりやすい空間内に、自己冷却機能がなくて自己の
熱容量や放熱面積に依存せざるを得ない放熱板を配置し
なくてはならないことから、放熱板を設けているとはい
え、十分な冷却効果を得ることができなかった。However, in the conventional electric tool, the effect has been sufficiently obtained for cooling the motor, but not sufficiently for cooling the electronic parts. In other words, the heat radiating plate is attached to the electronic component for cooling. However, in the case of electric power tools, especially portable electric power tools, a small and small space in the tool housing in which the heat is easily stored is provided. However, since a heat sink that has no self-cooling function and has to depend on its own heat capacity and heat dissipation area must be arranged, it is possible to obtain a sufficient cooling effect even though the heat sink is provided. could not.
【０００４】また、モータ冷却に関して言えば、従来の
電動工具における工具ハウジングに設けた通風孔（排気
口）は、モータから吐出される熱風が電動工具を持つ作
業者の手にあたるところにあり、作業中に熱く感じるも
のとなっていた。[0004] With respect to motor cooling, a ventilation hole (exhaust port) provided in a tool housing of a conventional electric tool is such that hot air discharged from a motor hits a hand of an operator holding the electric tool. It felt hot inside.
【０００５】本発明はこのような点に鑑みなされたもの
であって、その目的とするところはモータ及び電子部品
の冷却を効果的に行うことができる電動工具の冷却構造
を提供するにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooling structure for an electric power tool capable of effectively cooling a motor and electronic components.
【０００６】[0006]
【課題を解決するための手段】しかして本発明は、駆動
源であるモータが遠心型冷却ファンを内蔵してケーシン
グ外面に排気口を、ケーシングの軸方向端面に吸気口を
備えており、モータ駆動用の電子部品には通気口が形成
されている放熱板が取り付けられており、上記モータ及
び放熱板を収容する工具ハウジングは上記排気口に対応
する位置に排気孔を備えるとともに、放熱板が内部に対
向する位置に吸気孔を備えて、冷却風用の吸気路が該吸
気孔と放熱板の通気口とケーシングの吸気口とで形成さ
れていることに特徴を有している。According to the present invention, a motor as a drive source has a built-in centrifugal cooling fan and an exhaust port on the outer surface of a casing, and an intake port on an axial end face of the casing. A radiator plate having a ventilation hole is attached to the electronic component for driving, and the motor housing and the tool housing for accommodating the radiator plate have an exhaust hole at a position corresponding to the exhaust port. An intake hole is provided at a position facing the inside, and an intake path for cooling air is formed by the intake hole, a vent of a heat sink, and an intake of a casing.
【０００７】冷却ファンによる冷却風が、工具ハウジン
グの吸気孔から放熱板の通気口とケーシングの吸気口を
順に経てモータ内部に入り、ケーシングの排気口から工
具ハウジングの排気孔を経て外部に排出されるようにし
たものである。[0007] Cooling air from the cooling fan enters the motor through the suction hole of the tool housing, passes through the ventilation port of the radiator plate and the suction port of the casing in order, and is discharged from the exhaust port of the casing to the outside through the exhaust hole of the tool housing. That's what I did.
【０００８】上記工具ハウジングはグリップ部の延出方
向と逆の側に排気孔を備えたものとしておくことが、熱
風である排気がグリップ部側に出てしまうことを避ける
点で好ましい。It is preferable that the tool housing is provided with an exhaust hole on the side opposite to the direction in which the grip portion extends, in order to prevent the exhaust, which is hot air, from exiting to the grip portion side.
【０００９】また、工具ハウジングはモータのケーシン
グに形成された排気口と工具ハウジングに形成された排
気孔とをつなぐ排気路を他の部分から区画するリブを内
面に備えたものとなっていると、排気がモータと工具ハ
ウジングとの間の空間に広がってしまうことを避けるこ
とができる。In addition, the tool housing is provided with a rib on an inner surface thereof for separating an exhaust path connecting an exhaust port formed in a casing of the motor and an exhaust hole formed in the tool housing from other portions. This prevents the exhaust air from spreading to the space between the motor and the tool housing.
【００１０】さらには工具ハウジングの吸気孔は工具ハ
ウジングの後端面の外周部に設けておくのが好ましく、
放熱板はモータのケーシングの吸気口を覆うとともにケ
ーシングに接触していることが好ましい。Further, it is preferable that the suction hole of the tool housing is provided in an outer peripheral portion of a rear end face of the tool housing.
It is preferable that the radiator plate covers the intake port of the motor casing and is in contact with the casing.
【００１１】[0011]
【発明の実施の形態】以下本発明を図示の実施の形態の
一例に基づいて詳述すると、図１は本願に係る電動工具
において用いるモータ２を示しており、有底円筒状の筒
体２６とこの筒体２６の開口面を閉じるブラケット２７
とからなるケーシング２５の内周面にマグネット２４を
固着するとともに、該ケーシング２５内にコイルブロッ
ク２３を回転軸２２に固着したロータ２１を軸受け支持
して配設したもので、上記回転軸２２には遠心型の冷却
ファン３が取り付けられて、該冷却ファン３がブラケッ
ト２７側の内部に配された整流ブロック２８と上記コイ
ルブロック２３との間に配設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. FIG. 1 shows a motor 2 used in an electric power tool according to the present invention, and a cylindrical body 26 having a bottomed cylindrical shape. And a bracket 27 for closing the opening surface of the cylindrical body 26
A magnet 24 is fixed to the inner peripheral surface of a casing 25 composed of: and a rotor 21 having a coil block 23 fixed to a rotating shaft 22 is supported and disposed in the casing 25. Is mounted with a centrifugal cooling fan 3, and the cooling fan 3 is disposed between the rectifying block 28 disposed inside the bracket 27 and the coil block 23.
【００１２】そして、上記ケーシング２５の軸方向両端
には夫々複数の吸気口３０が形成されており、ケーシン
グ２５の外周面で上記遠心型冷却ファン３の外周となる
ところには複数の排気口３１が形成されており、モータ
２に通電されてロータ２１が回転する時、ロータ２１と
共に回転する冷却ファン３は、ケーシング２５の軸方向
両端に位置する吸気口３０から夫々吸い込んだ空気を排
気口３１を通じて外部に吐出する。A plurality of intake ports 30 are formed at both ends in the axial direction of the casing 25, and a plurality of exhaust ports 31 are provided on the outer peripheral surface of the casing 25 at the outer periphery of the centrifugal cooling fan 3. When the motor 2 is energized and the rotor 21 rotates, the cooling fan 3 that rotates together with the rotor 21 discharges the air sucked from the intake ports 30 located at both ends in the axial direction of the casing 25 to the exhaust port 31. To the outside through
【００１３】一方、モータ２の駆動のためのＦＥＴのよ
うな電子部品４には放熱板５が取り付けられているので
あるが、ここでの放熱板５は底の浅い有底円筒状に形成
されて、複数の通気口５０が貫通形成されている底板部
の内面側が電子部品４の固定場所となっているととも
に、開口縁が上記モータ２のケーシング２５のブラケッ
ト２７側の端部外周面に被せられて、ケーシング２５の
ブラケット２７側の端部を放熱板５が覆ってしまうもの
となっている。On the other hand, a radiator plate 5 is attached to an electronic component 4 such as an FET for driving the motor 2, and the radiator plate 5 is formed in a cylindrical shape with a shallow bottom. The inside surface of the bottom plate portion through which the plurality of ventilation holes 50 are formed is a fixing place for the electronic component 4, and the opening edge covers the outer peripheral surface of the end of the casing 25 of the motor 2 on the bracket 27 side. The heat radiating plate 5 covers the end of the casing 25 on the bracket 27 side.
【００１４】放熱板５が一端に連結された上記モータ２
は、図２に示すように合成樹脂製の工具ハウジング１内
に納める。つまり、放熱板５が工具ハウジング１の後端
側に位置するようにモータ２を収納する。この時、工具
ハウジング１の後端面の外周寄りの部分に複数の吸気孔
１２を設けるとともに、その内面と放熱板５との間には
所要の空隙が生じるようにしており、このためにモータ
２が回転して冷却ファン３が空気を吸い込む時、ブラケ
ット２７側の吸気口３０を通じてモータ２内部に入って
くる空気は、工具ハウジング１後端の吸気孔１２から工
具ハウジング１内に入り、放熱板５に沿って広がるとと
もに放熱板５に設けた多数の通気口５０と、放熱板５と
ブラケット２７との間の空間を経てモータ２内部に流入
する。つまり、モータ２内部に流入する冷却風は、放熱
板５及び電子部品４を冷やすものともなっているととも
に、放熱板５は吸気口３０のあるブラケット２７を覆っ
ていることから、放熱板５の通気口５０を経た空気のみ
がブラケット２７の吸気口３０を通じてモータ２内部に
流入する。The motor 2 having a heat sink 5 connected to one end.
Are housed in a synthetic resin tool housing 1 as shown in FIG. That is, the motor 2 is housed so that the heat radiating plate 5 is located on the rear end side of the tool housing 1. At this time, a plurality of intake holes 12 are provided in a portion of the rear end surface of the tool housing 1 near the outer periphery, and a required gap is formed between the inner surface and the heat radiating plate 5. When the cooling fan 3 sucks air by rotating, the air entering the motor 2 through the air inlet 30 on the bracket 27 side enters the tool housing 1 through the air inlet 12 at the rear end of the tool housing 1, and the heat radiating plate 5, the air flows into the motor 2 through a large number of vents 50 provided in the heat sink 5 and a space between the heat sink 5 and the bracket 27. In other words, the cooling air flowing into the motor 2 also cools the radiator plate 5 and the electronic components 4, and the radiator plate 5 covers the bracket 27 having the intake port 30. Only the air that has passed through the port 50 flows into the motor 2 through the intake port 30 of the bracket 27.
【００１５】そして、遠心型冷却ファン３による排気風
はケーシング２５の排気口３１と工具ハウジング１に設
けられた排気孔１３とを通じて外部に放出される。この
時、工具ハウジング１の内面には、モータ２のケーシン
グ２５における排気口３１が設けられた部分を他の部分
から仕切って排気を排気孔１３へと導く環状のリブ１
４，１４を設けているために、熱気となっている排気は
リブ１４で仕切られた環状の排気路を通じて排気孔１３
へと向かうものであり、排気がモータ２と工具ハウジン
グ１との間の空間を通じて工具ハウジング１内に広がる
ことがなく、これに伴って冷却風の流れが排気で乱され
てしまうことがないために、モータ２内部の冷却効率も
向上する。The exhaust air from the centrifugal cooling fan 3 is discharged outside through an exhaust port 31 of the casing 25 and an exhaust hole 13 provided in the tool housing 1. At this time, on the inner surface of the tool housing 1, a portion of the casing 25 of the motor 2 where the exhaust port 31 is provided is separated from other portions to form an annular rib 1 that guides exhaust to the exhaust hole 13.
Because of the provision of the exhaust holes 13, 14, the hot exhaust air passes through the exhaust holes 13 through the annular exhaust passage partitioned by the ribs 14.
The exhaust does not spread into the tool housing 1 through the space between the motor 2 and the tool housing 1, and the flow of the cooling air is not disturbed by the exhaust. In addition, the cooling efficiency inside the motor 2 is also improved.
【００１６】また工具ハウジング１における排気孔１３
は、図３にも示すように、グリップ部１８が下部から延
長されている工具ハウジング１の上面側にのみ設けてい
ることから、排気孔１３から排出される排気がグリップ
部１８を握る手に当たることがなく、従って作業者が排
気で不快な思いをすることもない。The exhaust hole 13 in the tool housing 1
As shown in FIG. 3, since the grip portion 18 is provided only on the upper surface side of the tool housing 1 extending from the lower portion, the exhaust gas discharged from the exhaust hole 13 hits the hand holding the grip portion 18. There is no waste, so that the workers do not feel uncomfortable with the exhaust.
【００１７】ちなみに、一定負荷の条件下で所定時間作
動させた時の各部の温度を測定すると、従来のものでは
モータ２の整流ブロック２８が１１７℃と１１４℃、ケ
ーシング２５が１１３℃、グリップ部１８が７０℃、排
気温度６５℃となる時、上記に示したものでは同一条件
下で整流ブロック２８が９１℃と８６℃、ケーシング２
５が８８℃、グリップ部１８が６０℃、排気温度が５７
℃となった。By the way, when the temperature of each part is measured for a predetermined time under a constant load condition, the temperature of the rectifying block 28 of the motor 2 is 117 ° C. and 114 ° C., the casing 25 is 113 ° C., and the grip part is the conventional one. When 18 reaches 70 ° C. and the exhaust temperature reaches 65 ° C., under the same conditions as described above, the rectifying block 28 operates at 91 ° C. and 86 ° C.
5 is 88 ° C, the grip 18 is 60 ° C, and the exhaust temperature is 57 ° C.
° C.
【００１８】[0018]
【発明の効果】以上のように本発明においては、駆動源
であるモータが遠心型冷却ファンを内蔵してケーシング
外面に排気口を、ケーシングの軸方向端面に吸気口を備
えており、モータ駆動用の電子部品には通気口が形成さ
れている放熱板が取り付けられており、上記モータ及び
放熱板を収容する工具ハウジングは上記排気口に対応す
る位置に排気孔を備えるとともに、放熱板が内部に対向
する位置に吸気孔を備えて、冷却風用の吸気路が該吸気
孔と放熱板の通気口とケーシングの吸気口とで形成され
ているために、冷却ファンによる冷却風は、工具ハウジ
ングの吸気孔から放熱板の通気口とケーシングの吸気口
を順に経てモータ内部に入り、ケーシングの排気口から
工具ハウジングの排気孔を経て外部に排出されるもので
あり、このためにモータの冷却はもちろんのこと、電子
部品の放熱も冷却風による放熱板の冷却がなされるため
に確実になされるものであり、従って電子部品の熱破壊
を防ぐことができるとともに信頼性の向上を図ることが
できる。As described above, in the present invention, the motor as the driving source has a built-in centrifugal cooling fan and has an exhaust port on the outer surface of the casing and an intake port on the axial end face of the casing. A radiator plate having a vent is attached to the electronic component for use. The motor and the tool housing for accommodating the radiator have an exhaust hole at a position corresponding to the exhaust port, and the radiator plate has an internal portion. The air intake passage for cooling air is formed by the air intake passage, the air vent of the heat sink, and the air intake of the casing. The motor enters the motor through the air inlet of the heat sink through the air inlet of the heat sink and the air inlet of the casing in order, and is discharged from the air outlet of the casing to the outside through the exhaust hole of the tool housing. In addition to cooling the data, the heat radiation of the electronic components is also ensured by cooling the radiator plate by the cooling air, so that the thermal destruction of the electronic components can be prevented and the reliability is improved. Can be achieved.
【００１９】そして、上記工具ハウジングにおける排気
孔はグリップ部の延出方向と逆の側に設けておくこと
で、熱風である排気がグリップ部側に出てしまうことが
なく、グリップ部を持つ手に熱風があたって作業者が不
快な思いをすることを避けることができる。The exhaust hole in the tool housing is provided on the side opposite to the direction in which the grip portion extends, so that the exhaust air, which is hot air, does not flow out to the grip portion side, and the hand holding the grip portion can be used. It is possible to prevent the worker from feeling unpleasant due to hot air.
【００２０】また、モータのケーシングに形成された排
気口と工具ハウジングに形成された排気孔とをつなぐ排
気路を他の部分から区画するリブを工具ハウジング内面
に備えているならば、排気がモータと工具ハウジングと
の間の空間に広がってしまうことを避けることができる
とともに、排気流が冷却風の流れを乱すことがなくなる
ために、さらに良好な冷却効果を得ることができ、これ
に伴ってグリップ部等を含めた各部の温度がさらに低下
するために、使用感の向上やモータの駆動効率の向上を
得ることができる。Further, if a rib is provided on the inner surface of the tool housing for defining an exhaust path connecting the exhaust port formed in the casing of the motor and the exhaust hole formed in the tool housing from other portions, the exhaust gas is supplied to the motor. Can be prevented from spreading to the space between the tool housing and the tool housing, and since the exhaust flow does not disturb the flow of the cooling air, a better cooling effect can be obtained. Since the temperature of each part including the grip part is further reduced, it is possible to improve the usability and the driving efficiency of the motor.
【００２１】さらには工具ハウジングの吸気孔は工具ハ
ウジングの後端面の外周部に設けておいたり、放熱板で
モータのケーシングの吸気口を覆うとともに放熱板をケ
ーシングに接触させておくのが放熱板の冷却効果を高め
ることができる点で好ましい。Further, the suction hole of the tool housing is provided in the outer peripheral portion of the rear end face of the tool housing, or the heat sink covers the suction port of the motor casing with the heat sink and makes the heat sink contact the casing. Is preferable in that the cooling effect can be enhanced.
【図１】本発明の実施の形態の一例におけるモータ及び
放熱板の断面図である。FIG. 1 is a cross-sectional view of a motor and a radiator plate according to an example of an embodiment of the present invention.
【図２】(a)は同上の部分背面図、(b)は同上の部分縦断
面図である。2A is a partial rear view of the same, and FIG. 2B is a partial vertical sectional view of the same.
【図３】同上の部分平面図である。FIG. 3 is a partial plan view of the same.
【図４】従来例を示すもので、(a)は同上の部分背面
図、(b)は同上の側面図である。4A and 4B show a conventional example, in which FIG. 4A is a partial rear view of the same, and FIG. 4B is a side view of the same.
１ 工具ハウジング ２ モータ ３ 冷却ファン ４ 電子部品 ５ 放熱板 １２ 吸気孔 ２５ ケーシング ３０ 吸気口 ３１ 排気口 ５０ 通気口 DESCRIPTION OF SYMBOLS 1 Tool housing 2 Motor 3 Cooling fan 4 Electronic component 5 Heat sink 12 Intake hole 25 Casing 30 Intake port 31 Exhaust port 50 Vent port
Claims (5)
を内蔵してケーシング外面に排気口を、ケーシングの軸
方向端面に吸気口を備えており、モータ駆動用の電子部
品には通気口が形成されている放熱板が取り付けられて
おり、上記モータ及び放熱板を収容する工具ハウジング
は上記排気口に対応する位置に排気孔を備えるととも
に、放熱板が内部に対向する位置に吸気孔を備えて、冷
却風用の吸気路が該吸気孔と放熱板の通気口とケーシン
グの吸気口とで形成されていることを特徴とする電動工
具の冷却構造。A motor as a driving source has a built-in centrifugal cooling fan and has an exhaust port on the outer surface of a casing, and an intake port on an axial end face of the casing, and a vent for electronic components for driving the motor. The formed heat sink is attached, and the tool housing for housing the motor and the heat sink has an exhaust hole at a position corresponding to the exhaust port, and has an intake hole at a position where the heat sink faces the inside. A cooling structure for a power tool, wherein a cooling air suction passage is formed by the suction hole, the ventilation hole of the heat sink, and the suction port of the casing.
と逆の側に排気孔を備えていることを特徴とする請求項
１記載の電動工具の冷却構造。2. The cooling structure for a power tool according to claim 1, wherein the tool housing has an exhaust hole on a side opposite to a direction in which the grip portion extends.
形成された排気口と工具ハウジングに形成された排気孔
とをつなぐ排気路を他の部分から区画するリブを内面に
備えていることを特徴とする請求項１または２記載の電
動工具の冷却構造。3. The tool housing is characterized in that a rib is formed on an inner surface of the tool housing, the rib defining an exhaust path connecting an exhaust port formed in a casing of the motor and an exhaust hole formed in the tool housing. The cooling structure for a power tool according to claim 1.
グの後端面の外周部に設けられていることを特徴とする
請求項１〜３のいずれかの項に記載の電動工具の冷却構
造。4. The cooling structure for a power tool according to claim 1, wherein the suction hole of the tool housing is provided in an outer peripheral portion of a rear end surface of the tool housing.
覆うとともにケーシングに接触していることを特徴とす
る請求項１〜４のいずれかの項に記載の電動工具の冷却
構造。5. The cooling structure for a power tool according to claim 1, wherein the radiator plate covers an intake port of a casing of the motor and is in contact with the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10113748A JPH11300656A (en) | 1998-04-23 | 1998-04-23 | Cooling structure for power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10113748A JPH11300656A (en) | 1998-04-23 | 1998-04-23 | Cooling structure for power tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11300656A true JPH11300656A (en) | 1999-11-02 |
Family
ID=14620134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10113748A Withdrawn JPH11300656A (en) | 1998-04-23 | 1998-04-23 | Cooling structure for power tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11300656A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1345309A2 (en) * | 2002-03-16 | 2003-09-17 | Robert Bosch Gmbh | Electric power tool with a fan |
| JP2005224648A (en) * | 2004-02-10 | 2005-08-25 | Ueda Japan Radio Co Ltd | Atomizer |
| JP2007136607A (en) * | 2005-11-17 | 2007-06-07 | Matsushita Electric Works Ltd | Power tool |
| WO2007119596A1 (en) * | 2006-03-30 | 2007-10-25 | Max Co., Ltd. | Electric power tool |
| JP2008173712A (en) * | 2007-01-18 | 2008-07-31 | Hitachi Koki Co Ltd | Cordless power tool |
| WO2008156185A1 (en) * | 2007-06-18 | 2008-12-24 | Hitachi Koki Co., Ltd. | Power tool |
| US7605513B2 (en) | 2004-02-03 | 2009-10-20 | Hitachi Koki Co., Ltd. | Electric tool having electric motor with first and second coils having first and second coil bundles of different innermost peripheral length |
| JP2010207992A (en) * | 2009-03-11 | 2010-09-24 | Hitachi Koki Co Ltd | Power tool |
| EP2298503A2 (en) * | 2009-09-18 | 2011-03-23 | Panasonic Electric Works Power Tools Co., Ltd. | Electric power tool |
| JP2014193112A (en) * | 2013-03-26 | 2014-10-06 | Johnson Electric Sa | Electric motor employing cooling device |
| EP3385035A1 (en) * | 2015-10-30 | 2018-10-10 | Black & Decker Inc. | Control and power module for driving a brushless motor in a power tool |
-
1998
- 1998-04-23 JP JP10113748A patent/JPH11300656A/en not_active Withdrawn
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1345309A3 (en) * | 2002-03-16 | 2005-09-14 | Robert Bosch Gmbh | Electric power tool with a fan |
| EP1345309A2 (en) * | 2002-03-16 | 2003-09-17 | Robert Bosch Gmbh | Electric power tool with a fan |
| US7605513B2 (en) | 2004-02-03 | 2009-10-20 | Hitachi Koki Co., Ltd. | Electric tool having electric motor with first and second coils having first and second coil bundles of different innermost peripheral length |
| JP2005224648A (en) * | 2004-02-10 | 2005-08-25 | Ueda Japan Radio Co Ltd | Atomizer |
| JP2007136607A (en) * | 2005-11-17 | 2007-06-07 | Matsushita Electric Works Ltd | Power tool |
| JP4631663B2 (en) * | 2005-11-17 | 2011-02-16 | パナソニック電工株式会社 | Electric tool |
| WO2007119596A1 (en) * | 2006-03-30 | 2007-10-25 | Max Co., Ltd. | Electric power tool |
| JP2008173712A (en) * | 2007-01-18 | 2008-07-31 | Hitachi Koki Co Ltd | Cordless power tool |
| JP2008307664A (en) * | 2007-06-18 | 2008-12-25 | Hitachi Koki Co Ltd | Power tool |
| WO2008156185A1 (en) * | 2007-06-18 | 2008-12-24 | Hitachi Koki Co., Ltd. | Power tool |
| US8084901B2 (en) | 2007-06-18 | 2011-12-27 | Hitachi Koki Co., Ltd. | Power tool |
| JP2010207992A (en) * | 2009-03-11 | 2010-09-24 | Hitachi Koki Co Ltd | Power tool |
| EP2298503A2 (en) * | 2009-09-18 | 2011-03-23 | Panasonic Electric Works Power Tools Co., Ltd. | Electric power tool |
| EP2298503A3 (en) * | 2009-09-18 | 2011-07-13 | Panasonic Electric Works Power Tools Co., Ltd. | Electric power tool |
| US8405260B2 (en) | 2009-09-18 | 2013-03-26 | Panasonic Electric Works Power Tools Co., Ltd. | Electric power tool |
| JP2014193112A (en) * | 2013-03-26 | 2014-10-06 | Johnson Electric Sa | Electric motor employing cooling device |
| EP3385035A1 (en) * | 2015-10-30 | 2018-10-10 | Black & Decker Inc. | Control and power module for driving a brushless motor in a power tool |
| US10603777B2 (en) | 2015-10-30 | 2020-03-31 | Black & Decker Inc. | Control and power module for driving a brushless motor in a power tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050705 |