WO2014132744A1 - Raboteuse électrique portative - Google Patents

Raboteuse électrique portative Download PDF

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Publication number
WO2014132744A1
WO2014132744A1 PCT/JP2014/052276 JP2014052276W WO2014132744A1 WO 2014132744 A1 WO2014132744 A1 WO 2014132744A1 JP 2014052276 W JP2014052276 W JP 2014052276W WO 2014132744 A1 WO2014132744 A1 WO 2014132744A1
Authority
WO
WIPO (PCT)
Prior art keywords
portable electric
cutter block
brushless motor
housing
base
Prior art date
Application number
PCT/JP2014/052276
Other languages
English (en)
Japanese (ja)
Inventor
勇人 山口
Original Assignee
日立工機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 日立工機株式会社 filed Critical 日立工機株式会社
Priority to JP2015502821A priority Critical patent/JP6044811B2/ja
Publication of WO2014132744A1 publication Critical patent/WO2014132744A1/fr

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
    • B27C1/10—Hand planes equipped with power-driven cutter blocks

Definitions

  • the present invention relates to a portable electric planer suitable for cutting the surface of a work material such as wood.
  • a basic configuration of a portable electric plane is disclosed in, for example, Patent Document 1 below.
  • the structure and use method of the portable electric plane will be described with reference to FIG.
  • a cutter block 10 driven by an electric motor is rotatably disposed at the center of the main body, and a cutter 11 is attached to the outer peripheral portion of the cutter block 10.
  • a front base 8 and a rear base 9 that are in contact with the work material 70 are attached to the lower part of the main body, and a rotatable stand 6 that protrudes from the bottom of the base is provided at the rear part of the rear base 9.
  • the tip of the front base 8 and the stand 6 serve as a fulcrum, and a portable electric plane can be placed without damaging the work material 70.
  • the front base 8 is advanced forward along the work material 70, and the work material 70 is cut by the rotation of the cutter accompanying the rotation of the cutter block 10.
  • the rear base 9 is moved along the cutting surface and the main body is moved forward. Since the stand 6 is rotatable, it is lifted up to the cutting surface by the work material 70 as the main body advances.
  • the conventional portable electric planer uses a commutator motor (for example, a universal motor) using an electromagnet for both the rotor and the stator as the motor. For this reason, the commutator must be replaced after long-term use.
  • a general commutator motor cannot control the stop position of the motor. In this case, there is room for improvement in terms of control, such as the rotational position of the cutter block being stopped cannot be made constant.
  • the present invention has been made in view of such a situation, and an object of the present invention is to provide a portable electric planer that does not require replacement of a commutator and is easy to maintain.
  • An aspect of the present invention is a portable electric plane, which includes a housing, a cutter block that is rotatably provided in the housing, a blade provided in the cutter block, and a built-in housing that rotates the cutter block.
  • An electric motor for driving and a control unit for controlling the electric motor are provided, and the electric motor is a brushless motor.
  • Position detecting means for detecting the rotational position of the cutter block may be provided, and the control unit may control the brushless motor so that the cutter block stops at a predetermined rotational position.
  • the base portion may include a front base and a rear base, and a control circuit board on which the control portion is mounted may be provided between the rear base and the inner surface of the housing.
  • control circuit board on which the control unit is mounted and the power supply board on which a switching element that supplies power to the brushless motor may be separate boards.
  • the base part may include a front base and a rear base
  • the control circuit board may be provided inside the handle part of the housing
  • the power supply board may be provided between the rear base and the inner surface of the housing.
  • a belt transmission mechanism that transmits the rotation of the brushless motor to the cutter block may be provided. *
  • the control unit may notify the outside when the rotation speed of the brushless motor and the rotation speed of the cutter block are out of a predetermined rotation speed ratio range or stop the brushless motor.
  • Electric power may be supplied to the brushless motor from a secondary battery.
  • Electric power may be supplied to the brushless motor from an external AC power source.
  • FIG. 2 is a plan sectional view of the portable electric planer 1 shown in FIG. 1.
  • FIG. 2 is a layout explanatory view of a power circuit board 40 and a control circuit board 50 in the housing 2 shown in FIG. 1.
  • the left view of the portable electric plane 1 shown in FIG. The enlarged left view of the cutter block 10 shown in FIG.
  • the simple functional block diagram of the portable electric plane 1 shown in FIG. The flowchart of the stop operation
  • FIG. 1 is a right side view, partly in section, of a portable electric planer 1 according to an embodiment of the present invention.
  • FIG. 2 is a plan sectional view of the portable electric planer 1.
  • FIG. 3 is an explanatory view of the arrangement of the power circuit board 40 and the control circuit board 50 in the housing 2 of the portable electric planer 1.
  • FIG. 4 is a left side view of the portable electric plane 1.
  • FIG. 5 is an enlarged left side view of the cutter block 10 of the portable electric planer 1.
  • FIG. 6 is an enlarged view of the brushless motor 20 of the portable electric plane 1 as seen from the axial direction. In FIG. 6, the winding (stator coil) is not shown. In FIG. 6, the flow of magnetic flux when the brushless motor 20 is not energized is indicated by arrows. *
  • the portable electric plane 1 operates by receiving power supply from an AC power source such as a commercial power source via a power cord 5.
  • the cutter block 10 is rotatably supported by bearings 18 and 19 at the central portion in the housing 2.
  • the cutter 11 is attached and fixed to the outer periphery of the cutter block 10 by a fastening member 35 such as a bolt.
  • a sensor magnet 30 is provided (fixed) on the end surface of the cutter block 10.
  • the blade position detection board 31 is provided in the housing 2 so as to face the sensor magnet 30 and detects the magnetic field of the sensor magnet 30.
  • the electric motor that rotationally drives the cutter block 10 is a brushless motor 20.
  • the brushless motor 20 is provided behind the cutter block 10 in the housing 2.
  • the output shaft 21 of the brushless motor 20 is rotatably supported by bearings 16 and 17.
  • the stator core 24 is fixedly supported in the housing 2.
  • a rotor core 22 is integrally provided on the output shaft 21, and a predetermined number (here, four poles) of plate-like magnets 23 are inserted and fixed to the rotor core 22 (FIG. 6).
  • a sensor magnet 32 is provided (fixed) on the end surface of the rotor core 22.
  • the motor position detection board 25 is provided in the housing 2 so as to face the sensor magnet 32 and detects the magnetic field of the sensor magnet 32.
  • the cooling fan 26 is attached to the output shaft 21 and rotates integrally with the output shaft 21.
  • the rotation of the output shaft 21 is transmitted to the cutter block 10 by a belt transmission mechanism (winding transmission mechanism) including pulleys 27 and 28 and a belt 29. *
  • a front base 8 and a rear base 9 that are in contact with the work material 70 are attached to the lower portion of the housing 2.
  • the front base 8 and the rear base 9 are examples of base portions.
  • a stand 6 is rotatably provided at the rear portion of the rear base 9. The stand 6 is urged to stand up by a spring (not shown) (torsion coil spring) and protrudes from the lower surface of the rear base 9.
  • the cut depth adjusting mechanism 7 is provided to adjust the cut depth of the work material by the blade 2 by moving the front base 8 up and down. *
  • the power circuit board 40 is provided in the housing 2 so as to be positioned above the rear base 9.
  • the power supply circuit board 40 includes a diode bridge 43 that rectifies a supply voltage from an AC power supply, a smoothing capacitor 41, and a switching element 42 (IGBT, FET, etc.) that is bridge-connected to form an inverter circuit.
  • the control circuit board 50 is provided inside the handle portion 3.
  • a microcomputer 51 is mounted on the control circuit board 50 as a control unit that controls the operation of the brushless motor 20.
  • the power circuit board 40 and the control circuit board 50 are electrically connected to each other by a cable or the like. *
  • the housing 2 Since each element mounted on the power circuit board 40 generates a large amount of heat, the housing 2 is provided with wind windows 12 and 13 (FIGS. 1, 2 and 4) on both sides of the power circuit board 40.
  • the cooling air is taken in from the wind windows 12 and 13 by the rotation of the fan 26.
  • the cooling air passes through the vent hole 15 provided in the partition wall 14 inside the housing 2 to the fan 26 side.
  • the housing 2 is provided with an air window 33 (FIG. 3) for cooling the brushless motor 20, and the cooling air is taken in from the air window 33 by the rotation of the fan 26.
  • the cooling air passing through the fan 26 changes direction and passes through the space above the cutter block 10 and is discharged from the exhaust hole 34 shown in FIGS. 3 and 4. At this time, shavings splashed upward by the blade 11 enter the cooling air passage from the through-hole 36 shown in FIG. 3, ride on the cooling air and are discharged from the exhaust hole 34. *
  • FIG. 7 is a simple functional block diagram of the portable electric plane 1.
  • the power supply 45 outputs a DC voltage (for example, 5 V) necessary for the operation of the microcomputer 51.
  • the microcomputer 51 controls the inverter circuit 44 (a bridge circuit of the switching element 42 shown in FIG. 2) and applies an AC voltage to the brushless motor 20.
  • the rotation of the brushless motor 20 is transmitted to the cutter block 10 by the belt transmission mechanism, and the cutter block 10 is rotationally driven.
  • the motor position detection board 25 is equipped with a magnetic sensor such as a Hall IC, and detects the rotational position of the brushless motor 20 by detecting the magnetic field generated by the sensor magnet 32 shown in FIG.
  • the blade position detection board 31 is equipped with a magnetic sensor such as a Hall IC, and the rotational position of the cutter block 10 (that is, the rotational position of the blade 11) is detected by detecting the magnetic field generated by the sensor magnet 30 shown in FIG. To detect.
  • the blade position detection substrate 31 and the magnetic sensor correspond to position detection means for detecting the rotational position of the cutter block 10.
  • the microcomputer 51 monitors the rotation speed of the brushless motor 20 and the rotation speed of the cutter block 10, and the rotation speed ratio is within a predetermined rotation speed ratio range (for example, a range of ⁇ 10% from the original rotation speed ratio).
  • the belt 29 is abnormal, such as deterioration of the belt 29, and is notified to the outside by the lighting of a lamp or the sound of a buzzer, or the rotation of the brushless motor 20 is stopped. If the belt 29 is not worn, the rotation speed of the brushless motor 20 and the rotation speed of the cutter block 10 are always the same, but if the belt 29 deteriorates due to wear or the like, it slips between the pulleys 28 and 29. Occurs, and the rotation speed ratio changes. *
  • FIG. 8 is a flowchart of the stop operation of the portable electric plane 1. This flowchart starts from a state in which the user turns on the trigger switch 4 and the brushless motor 20 is rotating. If the user disconnects the trigger switch 4 in this state (Yes in S1), the microcomputer 51 reduces the rotational speed of the brushless motor 20 by reducing the duty ratio of the drive signal of the inverter circuit 44 (S2). When the microcomputer 51 confirms that the rotational speed N [rpm] of the brushless motor 20 is less than the predetermined N1 [rpm] (Yes in S3), the microcomputer 51 rotates the cutter block 10 based on the detection signal from the blade position detection board 31.
  • the position is detected (S4), and the brushless motor 20 is completely stopped when the cutter block 10 reaches a predetermined rotational position (S6). At this time, the brushless motor 20 is completely stopped by the cogging torque unique to the permanent magnet motor.
  • the predetermined rotation position is a position where the blade 11 does not protrude from the lower surface of the base portion, that is, a position where the blade 11 does not contact the plane when the portable electric plane 1 is placed on the plane. More specifically, this is a rotational position where the cutting edge of the blade 11 is disposed at a position deviated from the opening between the front base 8 and the rear base 9.
  • the blade edge of which the blade edge is on the front side is at a position higher than the lower surface of the front base 8.
  • the predetermined rotation position is a position where the fastening member 35 that fixes the blade 11 faces downward as shown in FIG. In this case, the exchange work of the blade 11 becomes easy.
  • the blade edge of the blade edge on the rear side is the cutter block at a rotational position 30 ° or more, preferably 45 ° or more before the position closest to the front end of the rear base 9. 10 stops. By stopping at this position, when the work is started with the portable electric planer 1 pressed against the wood in the next work, the cutter block 10 comes into contact with the wood with a certain degree of acceleration. The start will be smooth. *
  • the brushless motor 20 for the electric motor that rotationally drives the cutter block 10
  • the cogging torque unique to the permanent magnet motor Can be used to control the rotation stop position of the brushless motor 20. For this reason, it becomes possible to stop the brushless motor 20 at a position where the cutter 11 does not protrude from the lower surface of the base portion, and even if the stand 6 is not raised, the workpiece 70 is not damaged and the cutter 11 is deteriorated. Without a portable electric plane 1 can be placed. Moreover, even if the main body is accidentally pushed or an impact is applied and the stand 6 is inadvertently detached, it is possible to prevent the work material 70 from being damaged or the blade 11 from being deteriorated. *
  • the stand 6 shown in the embodiment may be omitted.
  • the power circuit board 40 and the control circuit board 50 may be a single board.
  • the brushless motor 20 is not limited to being driven by an AC power source such as a commercial power source, and may be driven by a secondary battery.
  • 1 portable electric planer 2 housing, 3 handle section, 4 trigger switch, 5 power cord, 6 stand, 7 cutting depth adjustment mechanism, 8 front base, 9 rear base, 10 cutter block, 11 blade, 12, 13 wind window, 14 partition wall, 15 vent hole, 16-19 bearing, 20 brushless motor, 21 output shaft, 22 rotor core, 23 magnet, 24 stator core, 25 motor position detection board, 26 fan, 27, 28 pulley, 29 belt, 30 sensor magnet, 31 blade position detection board, 32 sensor magnet, 33 wind window, 34 exhaust hole, 35 fastening member, 36 through hole, 40 power circuit board, 41 capacitor, 42 switching element, 43 diode bridge, 44 inverter Road, 45 power supply, 50 a control circuit board, 51 microcomputer, 70 Workpiece

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)

Abstract

L'invention concerne une raboteuse électrique portative ne nécessitant pas le remplacement d'un commutateur et pouvant être entretenue facilement. Un arbre porte-lames (10) est supporté en rotation par un palier (18, 19) dans le centre à l'intérieur d'un logement (2). Une lame (11) est attachée/fixée au moyen d'un élément de fixation (35) tel qu'un boulon sur la périphérie externe de l'arbre porte-lames. Un aimant de détection (30) est fourni à une surface d'extrémité de l'arbre porte-lames. Un panneau de détection de position de lame (31) est fourni à l'intérieur du logement de manière à être disposé en face de l'aimant de détection et détecte le champ magnétique de l'aimant de détection. Un moteur électrique qui provoque l'entraînement en rotation de l'arbre porte-lames est un moteur sans balais (20). Lors de l'arrêt, le moteur sans balais est stoppé à l'endroit où l'arbre porte-lames arrive au niveau d'une position de rotation prédéterminée.
PCT/JP2014/052276 2013-02-27 2014-01-31 Raboteuse électrique portative WO2014132744A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015502821A JP6044811B2 (ja) 2013-02-27 2014-01-31 携帯用電気かんな

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013037806 2013-02-27
JP2013-037806 2013-02-27

Publications (1)

Publication Number Publication Date
WO2014132744A1 true WO2014132744A1 (fr) 2014-09-04

Family

ID=51428018

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PCT/JP2014/052276 WO2014132744A1 (fr) 2013-02-27 2014-01-31 Raboteuse électrique portative

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JP (1) JP6044811B2 (fr)
WO (1) WO2014132744A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023210782A1 (fr) * 2022-04-28 2023-11-02 工機ホールディングス株式会社 Machine de travail
WO2024002997A1 (fr) * 2022-06-30 2024-01-04 Robert Bosch Gmbh Machine-outil portative

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5731502A (en) * 1980-06-28 1982-02-20 Bosch Gmbh Robert Portable motor tool
JP2007276042A (ja) * 2006-04-05 2007-10-25 Max Co Ltd 電動工具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS468959Y1 (fr) * 1967-04-21 1971-03-30
JPH0798324B2 (ja) * 1987-08-10 1995-10-25 株式会社芝浦製作所 カンナ
JPH02239900A (ja) * 1989-03-14 1990-09-21 Toshiba Corp 乾燥機
JP2003145447A (ja) * 2001-11-12 2003-05-20 Nidec Shibaura Corp 電動工具
JP5333719B2 (ja) * 2008-05-29 2013-11-06 日立工機株式会社 電動工具
JP5839214B2 (ja) * 2010-06-04 2016-01-06 日立工機株式会社 刈込機
JP5573596B2 (ja) * 2010-10-28 2014-08-20 パナソニック株式会社 ドラム式洗濯機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5731502A (en) * 1980-06-28 1982-02-20 Bosch Gmbh Robert Portable motor tool
JP2007276042A (ja) * 2006-04-05 2007-10-25 Max Co Ltd 電動工具

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023210782A1 (fr) * 2022-04-28 2023-11-02 工機ホールディングス株式会社 Machine de travail
WO2024002997A1 (fr) * 2022-06-30 2024-01-04 Robert Bosch Gmbh Machine-outil portative

Also Published As

Publication number Publication date
JPWO2014132744A1 (ja) 2017-02-02
JP6044811B2 (ja) 2016-12-14

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