WO2014123070A1 - 電動工具 - Google Patents
電動工具 Download PDFInfo
- Publication number
- WO2014123070A1 WO2014123070A1 PCT/JP2014/052275 JP2014052275W WO2014123070A1 WO 2014123070 A1 WO2014123070 A1 WO 2014123070A1 JP 2014052275 W JP2014052275 W JP 2014052275W WO 2014123070 A1 WO2014123070 A1 WO 2014123070A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power
- circuit board
- control circuit
- motor
- housing
- Prior art date
Links
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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
- B25F5/02—Construction of casings, bodies or handles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
- H02K7/145—Hand-held machine tool
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
- H02K11/05—Rectifiers associated with casings, enclosures or brackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
Definitions
- the present invention relates to an electric tool that uses a commercial AC power supply, and more particularly to an electric tool that supplies electric power to a motor via a switching element.
- Patent Document 1 proposes an electric tool that uses a brushless motor as a motor and can finely control the rotation speed of the brushless motor by a microcomputer mounted on a control board.
- FIG. 6 shows a conventional electric tool shown in Patent Document 1, which includes a housing 1, a brushless motor 10, a striking mechanism unit 20 rotated by the motor 10, and an output unit 30 connected to the striking mechanism unit 20.
- Patent Document 1 which includes a housing 1, a brushless motor 10, a striking mechanism unit 20 rotated by the motor 10, and an output unit 30 connected to the striking mechanism unit 20.
- a front-rear direction and a vertical direction are defined in the figure). *
- the housing 1 includes a body portion 2 that houses the motor 10, the striking mechanism portion 20, and a part of the output portion 30, a handle portion 3 having one end connected to the body portion 2, and the other end of the handle portion 3. And a storage portion 4 formed in the shape.
- the handle portion 3 is provided with a trigger 5, and the trigger 5 is connected to a switch mechanism 6 accommodated in the handle portion 3. Supply of electric power to the motor 10 and interruption are switched by the trigger 5.
- a power cord 40 is drawn from the lower part of the storage unit 4, and a rectifier circuit board 50 that is connected to the power cord 40 and has a rectifier circuit that converts AC power into DC power is stored in the storage unit 4.
- a noise filter including a choke coil 41 and a capacitor 42 is inserted between the power cord 40 and the rectifier circuit. The noise filter is housed in the handle portion 3. *
- the inverter circuit controlled by the control circuit is mounted on an inverter circuit board 70 disposed behind the motor 10.
- the inverter circuit has, for example, six FETs 71 as switching elements that turn on and off the energization of the motor 10, and each FET 71 is cooled by an air flow by a fan 15 that rotates together with the motor 10.
- each FET 71 is arranged on the back side in the axial direction of the motor 10. Although it is convenient to cool the FET 71 by the air flow by the fan 15 rotating together with the motor 10, there is a tendency that the longitudinal length of the body portion 2 of the housing 1 is increased in order to secure the space for arranging the FET 71. *
- the present invention has been made in view of such a situation, and its purpose is to house a motor or the like by housing a switching element that supplies power to the motor in a housing part on the opposite side of the body part of the housing.
- An object of the present invention is to provide a power tool capable of reducing the length in the front-rear direction of the body portion of the housing.
- the electric tool includes a motor, an output unit that is driven by the motor and to which a tip tool is connected, a body unit that houses the motor, a handle unit that has one end connected to the body unit, and the other end of the handle unit
- a switching element that includes a housing having a storage portion provided on the power supply and a power cord drawn from the storage portion and that supplies power to the motor is stored in the storage portion.
- control circuit board may be stored in the storage unit, the control circuit may be mounted on one side of the control circuit board, and the switching element may be mounted on the other side.
- a push button is mounted together with the control circuit on one side of the control circuit board, and the push button is exposed from the storage portion.
- control circuit and the switching element may be electrically connected by a wiring pattern of the control circuit board.
- a rectifier circuit board on which a rectifier circuit that converts AC power supplied from the power cord into DC power is mounted may be stored in the storage unit.
- the said aspect WHEREIN It is good to provide the wind window part used as an inlet hole in a part of said accommodating part. *
- the said aspect WHEREIN It is good to comprise so that the airflow which entered from the said wind window part may pass between the said rectifier circuit board and the said control circuit board. *
- the wind window portion may be disposed in front of the storage portion protruding forward from the other end of the handle portion.
- a coil and a capacitor constituting a noise filter are accommodated in the handle portion, and an air flow entering from the wind window portion passes through the accommodating portion and then passes around the coil and the capacitor in the handle portion. It is good in the structure which reaches the motor in the body part.
- the motor is used by using a housing having a body portion that houses the motor, a handle portion having one end connected to the body portion, and a housing portion provided at the other end of the handle portion.
- the sectional side view which shows an impact driver The sectional side view which shows the air flow in the housing in embodiment.
- the control block diagram in embodiment.
- An impact driver will be described as an embodiment of the power tool according to the present invention with reference to FIGS. 1 to 4 (the front and rear and the vertical direction are defined in FIG. 1). Although this impact driver will be described later, the arrangement of the inverter circuit is different from that of the conventional example of FIG. *
- the housing 1 is connected to the body part 2 that houses the brushless motor 10, the striking mechanism part 20, and a part of the output part 30, and one end thereof. It has a handle part 3 and a storage part 4 formed at the other end of the handle part 3.
- the brushless motor 10 includes an output shaft 11 that extends in the front-rear direction, a rotor 12 that is fixed to the output shaft 11 and includes a plurality of permanent magnets, a stator 14 that is disposed so as to surround the rotor 12 and includes a plurality of stator coils 13, and an output shaft. 11 and a cooling fan 15 fixed to 11. Both sides of the output shaft 11 are axially supported (supported by bearings), and the stator 14 is fixed to the body portion 2 side of the housing 1. The rotation of the output shaft 11 is decelerated via the planetary gear mechanism 16 and applied to the hammer 21 of the striking mechanism unit 20. *
- the striking mechanism 20 includes a hammer 21 disposed in a hammer case 25 and a spring 23 that biases the hammer 21 forward.
- the hammer 21 has a collision portion 22 at the front end, and is rotated by the output shaft of the planetary gear mechanism 16.
- the anvil 31 that constitutes the output unit 30 includes a collision target 32 at the rear end.
- the hammer 21 is urged forward by a spring 23 so that the collision portion 22 collides with the colliding portion 32 in the rotation direction when rotating.
- the hammer 21 is configured to be able to move backward against the urging force of the spring. Move backward while rotating. And when the collision part 22 gets over the collision part 32, the elastic energy stored in the spring 23 is released, the hammer 21 moves forward, and the collision part 22 and the collision part 32 collide again. Become. *
- An anvil 31 constituting the output unit 30 is rotatably supported at the front end portion of the body portion 2, that is, the front end side of the hammer case 25, and a front end tool can be detachably attached to the anvil 31.
- the handle portion 3 is provided with a trigger 5, and the trigger 5 is connected to a switch mechanism 6 accommodated in the handle portion 3. Supply of electric power to the motor 10 and interruption are switched by the trigger 5.
- a power cord 40 is drawn out from the lower part of the storage unit 4 and is connected to the power cord 40 and is mounted with a rectifier circuit board 50 on which a rectifier circuit for converting AC power into DC power is mounted.
- a control circuit board 80 on which both of the circuits are mounted is stored in the storage unit 4.
- the rectifier circuit mounted on the rectifier circuit board 50 includes a diode bridge 45 and a smoothing capacitor 46 for full-wave rectification of commercial AC power (AC 100 V) supplied from the power cord 40.
- a noise filter including a choke coil 41 and a capacitor 42 is inserted on the AC input side of the diode bridge 45, and this noise filter is housed in the handle portion 3.
- the DC output voltage from the rectifier circuit is supplied to a control circuit 81 including a microcomputer or the like mounted on the control circuit board 80 and an inverter circuit 85 having FETs (for example, six) as switching elements for supplying power to the motor 10. Supplied. *
- the rotation detection board 90 In order to detect the position of the rotor 12 of the motor 10, the rotation detection board 90 has three Hall elements 91 arranged at an interval of 60 °.
- the rotation detection board 90 is behind the motor 10 shown in FIG. It is fixedly arranged (between the motor 10 and the fan 15).
- the rotation detection output of each Hall element 91 is input to the control circuit 81.
- the output of the switch mechanism 6 activated by the trigger 5 is also input to the control circuit 81. *
- FIG. 4 shows a schematic configuration of the control circuit board 80.
- a control circuit 81 is mounted on the upper surface of the double-sided wiring board 86, and an FET 71 as a switching element of the inverter circuit 85 is mounted on the lower surface.
- the control circuit 81 and the inverter circuit 85 including the FET 71 are electrically connected by the wiring pattern of the double-sided wiring board 86.
- the upper and lower surfaces of the double-sided wiring board 86 are molded with an insulating resin having good thermal conductivity.
- the control circuit 81 When the switch mechanism 6 is actuated by the trigger 5, the control circuit 81 performs on / off control of each FET 71 of the inverter circuit 85 based on the detection output of the rotor position by each Hall element 91, and moves the rotor 12 in a predetermined direction. Is controlled to rotate at a predetermined rotational speed.
- the control circuit board 80 is provided with a striking force display panel 87 exposed on the upper surface side of the storage portion 4.
- the striking force display panel 87 has a push button 88 as shown in FIG.
- the push button 88 is, for example, an impact force switching button for switching the motor rotation speed, a mode switching button for switching between continuous driving and intermittent driving of the motor 10, and the like.
- the arrangement of the housing 1 in the storage section 4 is the order of the outlet 48 of the power cord 40, the rectifier circuit board 50, and the control circuit board 80 in this order from the bottom.
- a gap serving as an air flow passage for heat dissipation is provided between the two and 80.
- the FET 71 is disposed so as to face the rectifier circuit board 50 (that is, face the air flow path).
- a wind window portion 7 having a large number of air intake holes is provided in front of the storage portion 4 protruding forward from the other end of the handle portion 3. Although illustration is omitted, a wind window portion in which a large number of exhaust holes are formed is provided at the rear portion of the body portion 2, and when the fan 15 rotates as indicated by a thick line arrow in FIG.
- the air flow that has entered the handle passes through the periphery of the rectifier circuit board 50 and the gap between the rectifier circuit board 50 and the control circuit board 80 and passes around the choke coil 41 and the capacitor 42 constituting the noise filter. It passes through the part 3, passes through between the rotor 12 and the stator 14 of the motor 10, and is discharged to the outside from the wind window part at the rear part of the body part 2.
- the FET 71 mounted on the rectifier circuit board 50 and the control circuit board 80 can be effectively cooled.
- the choke coil 41 and the condenser 42 can be cooled. *
- the FET 71 as a switching element for supplying the current in the storage portion 4, the length of the body portion 2 in the front-rear direction can be shortened, and as a result, workability in a narrow place can be improved.
- control circuit board 80 Since the control circuit board 80 is stored in the bag storage unit 4 and the control circuit 81 is mounted on one side of the control circuit board 80 and the FET 71 is mounted on the other side, The substrate area is not increased. In the case of an electric tool using a commercial AC power supply, the power consumption is larger than that of a battery-driven one, and the shape of the FET 71 is enlarged, but the FET 71 is mounted using the substrate surface opposite to the control circuit 81. This saves space. *
- a rectifier circuit board 50 on which a rectifier circuit for converting AC power supplied from the power cord 40 into DC power is mounted is stored in the storage unit 4, and an intake hole is formed in a part (front) of the storage unit 4.
- a wind window portion 7 is provided, and an air flow entering from the wind window portion 7 passes between the rectifier circuit board 50 and the control circuit board 80, and the FET 71 mounted on the control circuit board 80 is cooled. Can be done effectively.
- the air flow flows from the front to the rear in the storage portion 4, and then flows from the bottom to the top in the handle portion 3, and the choke coil 41 and the capacitor constituting the noise filter 42 can also be cooled.
- the air flow that has passed through the handle portion 3 passes between the rotor 12 and the stator 14 of the motor 10 in the body portion 2 from the front side to the rear side, thereby cooling the motor 10.
- a wide range of components can be cooled by meandering the airflow in a substantially Z shape and passing through the housing 1.
- FIG. 5 shows another embodiment of the present invention.
- the arrangement of the wind window portions 7 having a large number of intake holes is different. That is, the wind window portion 7 is provided on the side surface of the storage portion 4 of the housing 1.
- Other configurations may be the same as those of the embodiment shown in FIG. *
- the air flow that has entered the storage unit 4 from the wind window unit 7 passes between the rectifier circuit board and the control circuit board and is mounted on the control circuit board while cooling the periphery of the rectifier circuit board.
- the formed FET can be cooled.
- the wind window portion 7 is provided in front of the storage portion 4, and in the other embodiment shown in FIG. 5, the wind window portion 7 is provided on the side surface of the storage portion 4. A configuration in which the wind window portion 7 is provided on both of them is also possible.
- the impact driver is exemplified as the electric tool.
- the present invention is not limited to the impact driver as long as the electric tool is mounted and driven by an AC power source.
- a driver drill having a clutch a hammer drill having a reciprocating striking mechanism, an oil pulse driver having a hydraulic striking mechanism, and the like may be used.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Portable Power Tools In General (AREA)
Abstract
Description
2 胴体部
3 ハンドル部
4 収納部
5 トリガ
6 スイッチ機構
7 風窓部
10 ブラシレスモータ
15 ファン
20 打撃機構部
30 出力部
40 電源コード
50 整流回路基板
60,80 制御回路基板
70 インバータ回路基板
71 FET
81 制御回路
85 インバータ回路
86 両面配線基板
87 打撃力表示パネル
90 回転検出基板
91 ホール素子
Claims (9)
- モータと、前記モータによって駆動され、先端工具が接続される出力部と、前記モータを収容する胴体部、一端が前記胴体部に接続するハンドル部、及び前記ハンドル部の他端に設けられる収納部を有するハウジングと、前記収納部から引き出される電源コードとを備え、前記モータに電力を供給するスイッチング素子が前記収納部に収納されていることを特徴とする電動工具。
- 前記収納部に制御回路基板が収納され、前記制御回路基板の一方の側に制御回路が搭載されるとともに、他方の側に前記スイッチング素子が搭載されていることを特徴とする請求項1に記載の電動工具。
- 前記制御回路基板の一方の側に前記制御回路と共に押しボタンが搭載されており、前記押しボタンは前記収納部から露出していることを特徴とする請求項2に記載の電動工具。
- 前記制御回路と前記スイッチング素子とは前記制御回路基板の配線パターンにより電気的に接続されていることを特徴とする請求項2又は3に記載の電動工具。
- 前記電源コードで供給される交流電力を直流電力に変換する整流回路が搭載された整流回路基板が前記収納部に収納されていることを特徴とする請求項1乃至4のいずれか一項に記載の電動工具。
- 前記収納部の一部に吸気孔となる風窓部が設けられていることを特徴とする請求項1乃至5のいずれか一項に記載の電動工具。
- 前記電源コードで供給される交流電力を直流電力に変換する整流回路が搭載された整流回路基板が前記収納部に収納されると共に、前記収納部の一部に吸気孔となる風窓部が設けられており、前記風窓部から入った空気流が前記整流回路基板と前記制御回路基板の間を通過することを特徴とする請求項2乃至4のいずれか一項に記載の電動工具。
- 前記ハンドル部の他端よりも前側に突出した前記収納部の前方に、前記風窓部が配置されていることを特徴とする請求項6又は7に記載の電動工具。
- 前記ハンドル部内にノイズフィルタを構成するコイル及びコンデンサが収納され、前記風窓部から入った空気流が前記収納部を通過してから前記ハンドル部内の前記コイル及びコンデンサの周囲を通って前記胴体部内の前記モータに至ることを特徴とする請求項6乃至8のいずれか一項に記載の電動工具。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014560747A JP6032445B2 (ja) | 2013-02-06 | 2014-01-31 | 電動工具 |
CN201480006235.XA CN104955619B (zh) | 2013-02-06 | 2014-01-31 | 电动工具 |
US14/763,781 US9871424B2 (en) | 2013-02-06 | 2014-01-31 | Electric tool |
EP14749324.1A EP2954984B1 (en) | 2013-02-06 | 2014-01-31 | Electric tool |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-021522 | 2013-02-06 | ||
JP2013021522 | 2013-02-06 |
Publications (1)
Publication Number | Publication Date |
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WO2014123070A1 true WO2014123070A1 (ja) | 2014-08-14 |
Family
ID=51299666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/052275 WO2014123070A1 (ja) | 2013-02-06 | 2014-01-31 | 電動工具 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9871424B2 (ja) |
EP (1) | EP2954984B1 (ja) |
JP (1) | JP6032445B2 (ja) |
CN (1) | CN104955619B (ja) |
WO (1) | WO2014123070A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016067810A1 (ja) * | 2014-10-31 | 2016-05-06 | 日立工機株式会社 | 電動作業機 |
JP2019130650A (ja) * | 2018-02-02 | 2019-08-08 | 株式会社マキタ | 電動工具 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010031274B4 (de) * | 2009-12-18 | 2023-06-22 | Robert Bosch Gmbh | Handwerkzeugmaschine mit Kühlung des Getriebes |
JP6414224B2 (ja) * | 2014-08-29 | 2018-10-31 | 工機ホールディングス株式会社 | 電動作業機 |
CN206632411U (zh) * | 2017-03-23 | 2017-11-14 | 博世电动工具(中国)有限公司 | 电动工具及其电路板组件 |
EP3722051A1 (de) * | 2019-04-08 | 2020-10-14 | Hilti Aktiengesellschaft | Staubhaube für ein werkzeuggerät |
DE102019212865A1 (de) * | 2019-08-27 | 2021-03-04 | Robert Bosch Gmbh | Elektromotor sowie elektrisches Bearbeitungsgerät mit einem Elektromotor |
CN113767551A (zh) * | 2019-11-25 | 2021-12-07 | 胡斯华纳有限公司 | 手持式电动作业工具 |
US11750069B2 (en) | 2020-09-16 | 2023-09-05 | Black & Decker Inc. | Line conditioning accessory and protective circuit for power tool |
DE102021213442A1 (de) * | 2021-11-29 | 2023-06-01 | Robert Bosch Gesellschaft mit beschränkter Haftung | Handwerkzeugmaschine |
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2014
- 2014-01-31 JP JP2014560747A patent/JP6032445B2/ja active Active
- 2014-01-31 WO PCT/JP2014/052275 patent/WO2014123070A1/ja active Application Filing
- 2014-01-31 US US14/763,781 patent/US9871424B2/en active Active
- 2014-01-31 CN CN201480006235.XA patent/CN104955619B/zh active Active
- 2014-01-31 EP EP14749324.1A patent/EP2954984B1/en active Active
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016067810A1 (ja) * | 2014-10-31 | 2016-05-06 | 日立工機株式会社 | 電動作業機 |
JPWO2016067810A1 (ja) * | 2014-10-31 | 2017-08-17 | 日立工機株式会社 | 電動作業機 |
US11052530B2 (en) | 2014-10-31 | 2021-07-06 | Koki Holdings Co., Ltd. | Electric work machine |
JP2019130650A (ja) * | 2018-02-02 | 2019-08-08 | 株式会社マキタ | 電動工具 |
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EP2954984B1 (en) | 2017-10-04 |
US9871424B2 (en) | 2018-01-16 |
EP2954984A1 (en) | 2015-12-16 |
EP2954984A4 (en) | 2016-08-31 |
CN104955619A (zh) | 2015-09-30 |
CN104955619B (zh) | 2018-10-02 |
US20150364973A1 (en) | 2015-12-17 |
JPWO2014123070A1 (ja) | 2017-02-02 |
JP6032445B2 (ja) | 2016-11-30 |
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