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WO2017014008A1 - Outil de travail - Google Patents

Outil de travail Download PDF

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Publication number
WO2017014008A1
WO2017014008A1 PCT/JP2016/068988 JP2016068988W WO2017014008A1 WO 2017014008 A1 WO2017014008 A1 WO 2017014008A1 JP 2016068988 W JP2016068988 W JP 2016068988W WO 2017014008 A1 WO2017014008 A1 WO 2017014008A1
Authority
WO
WIPO (PCT)
Prior art keywords
work tool
switch
motor
control circuit
brushless motor
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.)
Ceased
Application number
PCT/JP2016/068988
Other languages
English (en)
Japanese (ja)
Inventor
西河　智雅
矢萩　明之
拓哉 根内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co Ltd
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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Publication of WO2017014008A1 publication Critical patent/WO2017014008A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/28—Floor-scrubbing machines, motor-driven
    • A47L11/282—Floor-scrubbing machines, motor-driven having rotary tools
    • A47L11/283—Floor-scrubbing machines, motor-driven having rotary tools the tools being disc brushes
    • 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
    • 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

Definitions

  • the present invention relates to a work tool driven by a motor, and more particularly, to implement a work tool that has a hook part that expands and contracts and arranges a motor at the tip of the hook part, and improves wiring efficiency and weight. .
  • a work tool that has a hook part, arranges a motor at the tip of the hook part, and rotates a work tool by the motor.
  • a polisher that drives a circular sponge, a brush, or the like with a motor to clean a floor surface or a wall surface is known.
  • the polisher arranges a motor at the tip of the collar, decelerates the output of the motor by a speed reduction mechanism, rotates the spindle, and attaches a pad, buff or brush as a work tool to the spindle.
  • a motor is driven using a commercial power supply by connecting a power cord.
  • cordless work tools have come to be widely used as performance of rechargeable secondary batteries improves. Such work tools are disclosed in Patent Document 1 and Patent Document 2.
  • a rear housing for holding a battery is provided at the rear end of the bag, and a drive unit for housing a motor is provided at the tip of the bag. Electric power is supplied from the battery to the drive unit by arranging the power supply line inside the flange portion composed of a fixed pipe and a movable pipe. Further, a switch for controlling on / off of the motor is provided in the rear housing, and the motor is turned on / off by supplying and cutting off the power supplied from the power line. Further, a speed adjustment dial for changing the rotation speed of the motor is provided in the rear housing, and the rotation speed of the motor is adjusted by adjusting the supplied voltage.
  • the present invention has been made in view of the above background, and the object thereof is a work tool having a telescopic ridge and a brushless motor arranged on the tip side, and the arrangement of the control circuit and the inverter circuit is devised, and each circuit is devised.
  • An object of the present invention is to provide a work tool that is efficiently mounted by shortening the wiring between them.
  • Another object of the present invention is to realize a work tool in which the power line and the connection line that are wired inside the telescopic cage are covered with a curl cord and the number of covered wires is reduced.
  • a retractable collar part a grip part provided at the rear end of the collar part, a power supply part provided at the grip part, a brushless motor provided at the tip of the collar part,
  • a work tool having a control circuit for controlling driving of a brushless motor, an inverter circuit, and a work tool driven by the brushless motor, wherein the control circuit and the inverter circuit are on the distal end side of the collar portion and in the vicinity of the brushless motor.
  • the connection line connecting the power supply unit with the control circuit and the inverter circuit was covered with a curl cord.
  • the collar portion is constituted by a divided hollow pipe made of, for example, an aluminum alloy, and the curl cord is disposed inside the collar portion.
  • a rear housing that forms a gripping portion is provided at the rear end of the collar portion, a battery mounting portion that allows the battery to be attached to and detached from the rear housing is provided, and the battery is used as the power source portion.
  • the rear housing is provided with a motor switch that can be operated by an operator and whose output is connected to the control circuit, and the switch wire connecting the switch and the control circuit is covered with a curl cord.
  • the battery is provided with an LD terminal for outputting an overdischarge protection signal, and a connection line (LD line) for connecting the LD terminal and the control circuit is covered with a curl cord together with the power supply line.
  • control circuit controls the on / off of the brushless motor by the switch operation signal, and the brushless motor according to the output form of the switch operation signal, for example, the length of the operation time. Change the motor speed.
  • this switch for example, a tactile switch can be used.
  • the control circuit for controlling the driving of the brushless motor and the inverter circuit are arranged at a position adjacent to the brushless motor provided at the tip of the collar portion, the wiring between the inverter circuit and the motor can be shortened. I was able to.
  • the control circuit for controlling the inverter circuit is arranged with the inverter circuit at a position adjacent to the brushless motor, that is, in the front housing, these wirings can be performed in the shortest time.
  • the motor operation switch and the speed adjustment switch are realized with a single switch element, and the number of wires for the switch wire via the collar is increased by one, so that the curl cord is covered with the power line. It was possible to suppress the thickening, and to realize a lightweight and easy-to-use work tool.
  • FIG. 1 It is a side view which shows the whole work tool 1 which concerns on the Example of this invention, and has shown the state at the time of shortening (when not extending
  • FIG. It is a side view which shows the whole work tool 1 which concerns on the Example of this invention, and has shown the state at the time of the expansion
  • FIG. It is a longitudinal cross-sectional view which shows the internal structure of the drive part 2 of FIG. It is a longitudinal cross-sectional view which shows the drive part 2 of the state which bent the rotation part 6 from the state of FIG. It is an expanded sectional view of the holding part 4 of FIG. It is a figure for demonstrating the shape of the expansion-contraction wiring 8 of FIG.
  • FIG. 1 It is a circuit diagram of the work tool which concerns on the Example of this invention. It is a figure for demonstrating the wiring from the holding part 4 to the drive part 2.
  • FIG. It is a side view which shows the whole working tool which concerns on the 2nd Example of this invention, and shows the state at the time of shortening (when not extending
  • FIG. 1 is a circuit diagram of the work tool which concerns on the Example of this invention. It is a figure for demonstrating the wiring from the holding part 4 to the drive part 2.
  • FIG. It is a side view which shows the whole working tool which concerns on the 2nd Example of this invention, and shows the state at the time of shortening (when not extending
  • the work tool 1 includes a grip part 4 having a power supply part, a telescopic hook part 3 fixed to the front side of the grip part 4, and a drive part 2 attached to the tip of the hook part 3.
  • the handle 7 is configured to be fixed near the center in the front-rear direction of the collar portion 3.
  • the expandable / contractible eaves part 3 includes a cylindrical fixed pipe 3a and movable pipes 3b and 3c connected to the front side of the fixed pipe 3a.
  • the movable pipes 3b and 3c are configured to be movable relative to the fixed pipe 3a in the front-rear direction.
  • the rear housing 41 constituting the grip portion 4 is provided with a power supply portion that supplies power for driving the motor 13.
  • the power supply unit is a part that supplies power to be used as power for the motor, and can be a power supply circuit that rectifies commercial alternating current or a power supply that uses a detachable secondary battery.
  • a power source using a detachable secondary battery is used, and a battery pack 70 is attached to the rear end portion of the rear housing 41.
  • the rear housing 41 constitutes a battery mounting portion that allows the battery pack 70 to be mounted, and forms a grip for an operator to hold with one hand.
  • the rear housing 41 is provided with an operation switch 44 for starting and stopping the motor 13, and the operator can easily operate the operation switch 44 with a gripping hand.
  • the movable pipe 3b is preferably formed of a cylindrical member made of the same material as that of the fixed pipe 3a, and the movable pipe 3b is disposed so as to enter the inside of the fixed pipe 3a.
  • a connecting portion 5 that can adjust the fixed position of the movable pipe 3b.
  • the connecting portion 5 is fixed to the fixed pipe 3a, and is fixed so that the movable pipe 3b does not move in the front-rear direction by tightening the movable pipe 3b.
  • the connecting portion 5 is provided with a fixed lever 5a for increasing or releasing the tightening force of the movable pipe 3b.
  • the operator operates the fixed lever 5a to move the movable pipe 3b in the front-rear direction in a state where the fixed state of the movable pipe 3b by the connecting portion 5 is loosened, and the fixed lever 5a at an arbitrary position (for example, extended position).
  • an arbitrary position for example, extended position.
  • the movable pipes 3b and 3c of the flange part 3 are provided with a rotating part 6 for enabling a part of the pipes to be bent.
  • the rotation part 6 is for enabling a part of the collar part 3 (particularly, the movable pipe part) to pivot, and is located at any position in the intermediate portion between the front end and the rear end of the collar part 3.
  • the rotating shaft of the rotating part 6 is arranged so as to be orthogonal to the longitudinal direction of the flange part 3, and the length of the movable pipe 3c is sufficiently shorter than the length of the movable pipe 3b.
  • a front housing 11 made of synthetic resin is fixed to the front side of the flange portion 3.
  • the front housing 11 is a housing that houses a brushless DC motor 13 serving as a drive source and a control circuit and an inverter circuit (both will be described later) necessary for the rotation control thereof.
  • the rotating shaft of the motor 13 is disposed so as to be substantially orthogonal to the longitudinal direction of the movable pipe 3c. The rotational driving force of the motor 13 is transmitted to the spindle 20 that fixes the polishing member 23.
  • FIG. 2 is a side view showing the entire work tool 1 and shows a state when the collar portion 3 is fully extended.
  • the movable pipes 3b and 3c have an outer diameter slightly smaller than the inner diameter of the fixed pipe 3a, and are fixed by the connecting portion 5 so that a part of the movable pipe 3b is located inside the fixed pipe 3a.
  • the holding part 4, the fixed pipe 3a, the handle 7, and the connecting part 5 are fixed parts, and the movable pipes 3b and 3c and the driving part 2 attached to the front side thereof move forward with respect to the fixed part. It becomes a possible moving part.
  • the front housing 11 can be turned by the turning portion 6. At this time, the curled portion of the stretchable wiring 8 disposed inside the collar portion 3 is in an extended state.
  • the rotating part 6 has a rotation axis that is orthogonal to the longitudinal direction of the movable pipe and is positioned in the horizontal direction, and the front part (movable pipe 3c) of the flange part is vertically oriented with respect to the rear side (movable pipe 3b) It was set as the structure which can rotate only a predetermined angle.
  • FIG. 3 is a longitudinal sectional view showing the internal structure of the drive unit 2 of FIG.
  • the front housing 11 is manufactured by integral molding of synthetic resin such as plastic, and is divided into two in the left-right direction on a vertical plane including the axis A3 (see FIG. 2) of the movable pipe 3c, and includes a plurality of screws (not shown). ).
  • the front housing 11 includes a body portion 11a having a substantially cylindrical inner space for housing the motor 13, a substrate housing portion 11b for housing the control circuit board 25 and mounting the operation display portion 26 on the upper portion,
  • tip of the movable pipe 3c of the part 3 is comprised. These are integrally manufactured from a synthetic resin such as plastic.
  • a cylindrical inner wall 11d is formed in the fixed portion 11c along the shape of the movable pipe 3c, and two screws (not shown) that pass through the screw holes 28a, 28b of the front housing 11 are passed through the movable pipe 3c. By passing through a hole (not shown), the front housing 11 is fixed to the movable pipe 3c.
  • the brushless motor has a rotor 13a having a permanent magnet and a stator 13b wound with a coil, and the rotating shaft 13c extends in a direction substantially orthogonal to the axial direction of the movable pipe 3c at an angle slightly larger than 90 degrees. Be placed.
  • the rotating shaft 13c of the motor 13 is provided with a cooling fan 17, and after the outside air is taken in from the air intake 15 when the motor 13 rotates to cool the heat generation part such as the motor, inverter circuit, microcomputer, etc., an air outlet (not shown) To the outside of the front housing 11.
  • a substantially annular circuit board 14 is provided on the rear end side in the axial direction of the stator 13b, and three rotational position detecting elements 24 such as Hall ICs are provided on the circuit board 14.
  • the rotation shaft 13c of the motor 13 is rotatably supported with respect to the front housing 11 by two bearings 16a and 16b.
  • Two planetary gear speed reduction mechanisms 18 and 19 are connected to the front side (front end work tool side) of the rotary shaft 13c, and the rotational force of the motor 13 is decelerated at a predetermined reduction ratio by the two-stage speed reduction mechanism. 20 is transmitted.
  • the spindle 20 is rotatably supported on the front housing 11 by a bearing 21, and an end portion on the front end side protrudes outside from a through hole formed in the front housing 11.
  • a polish member 23 is connected to the spindle 20 via a fixture 22.
  • the polish member 23 is an assembly in which, for example, a porous pad or sponge for floor surface polishing or cleaning is attached to the lower side of a disk-like base connected to the fixture 22 via a surface fastener.
  • a porous pad or sponge for floor surface polishing or cleaning is attached to the lower side of a disk-like base connected to the fixture 22 via a surface fastener.
  • commercially available cleaning tools of various sizes can be used.
  • the control circuit board 25 is housed in the board housing part 11b formed in a substantially rectangular parallelepiped box shape inside the front housing 11.
  • the control circuit board 25 includes a control unit (controller) (not shown) for driving the motor 13 included in the drive unit 2 and an inverter (not shown) that generates a three-phase alternating current for generating a rotating magnetic field in the coil of the motor 13.
  • a circuit is mounted.
  • the surface direction of the control circuit board 25 is arranged so as to be parallel to the axis of the rotating shaft 13c and the movable pipe 3c of the motor because of the accommodation space.
  • the arrangement direction is arbitrary, and is appropriately determined from the mounting efficiency. Set it.
  • a small LED substrate is provided on the upper surface side of the substrate housing portion 11b, and an LED (light emitting diode) is provided.
  • the remaining amount of the battery pack 70 and the set rotational speed of the motor 13 can be displayed by the number of lighting LEDs, and can be visually recognized from the upper side of the front housing 11.
  • an operation switch or a display device is provided on the upper surface portion of the substrate housing portion 11b so that the operation mode is set for the controller or the operation status is displayed from the controller to the user. May be.
  • a fixed portion 11c that forms a cylindrical inner wall 11d for fixing the movable pipe 3c is formed on the rear side surface of the substrate housing portion 11b.
  • reinforcing ribs 27 are formed on the substrate accommodating portion 11b and the fixed portion 11c of the movable pipe 3c. Further, in order to improve the cooling performance of the inverter circuit, the FET constituting the inverter circuit is arranged on the circuit board 14 on the surface opposite to the stator core of the motor 13, and the air intake 15 is provided by the cooling fan 17. It is good also as a structure which the cooling air suck
  • FIG. 4 is a longitudinal sectional view showing the driving unit 2 in a state where the rotating unit 6 is bent from the state 3.
  • a pipe holding portion 6a extending to the front side and a pipe holding portion 6b extending to the rear side are pivotally supported on the rotating portion 6, and are supported so that they can be rotated within a predetermined angle.
  • a torsion coil spring 9 is provided on the same axis as the rotation shaft.
  • the polishing member 23 When the worker performs the work, the polishing member 23 is pressed against the object to be cleaned, so that the reaction force is received from the polishing member 23 and the reaction force and the biasing force of the torsion coil spring 9 are balanced. Work is performed at a position where ⁇ . For example, this is located above the operator's hand, such as cleaning the solar panel surface in a ground-mounted solar power generation system in which a base is installed on the foundation and solar panels are arranged on the base. It is a bending state suitable for cleaning the inclined surface.
  • FIG. 5 is an enlarged cross-sectional view of the grip portion 4 of FIG.
  • the rear housing 41 is manufactured by integral molding of a synthetic resin such as plastic, and is joined by a plurality of screws (not shown) as a left and right divided part.
  • a handle 41a Near the center of the rear housing 41 in the axial direction (front-rear direction) is a handle 41a for an operator to hold with one hand, and the vicinity of the rear end of the fixed pipe 3a is a pipe holding formed on the inner part of the handle 41a. It is pinched by the part 41c.
  • a battery mounting portion 41b is formed in which the diameter of the rear housing 41 is increased in the radial direction orthogonal to the axis A1, and the battery pack 70 is mounted on the rear side.
  • the battery mounting portion 41b can be mounted while sliding the battery pack 70 from the lower direction to the upper direction.
  • the battery pack 70 accommodates a plurality of cylindrical secondary batteries such as nickel metal hydride batteries and lithium ion batteries, and is provided in a battery mounting portion of the rear housing 41. When removing the battery pack 70, the battery pack 70 can be removed from the rear housing 41 by moving the battery pack 70 downward while pressing the release button 71.
  • the battery mounting portion 41 b is provided with a plurality of connection terminals 45 that come into contact with a plurality of connectors of the battery pack 70, and the power (+ and ⁇ ) of the battery pack 70 is connected to the front housing 11 side by two power lines 81 and 82. Supplied to.
  • the cross-sectional shape of the fixed pipe 3a is, for example, a substantially circular shape, and the expandable wiring 8 is disposed inside.
  • the extensible wiring 8 is screwed to the inner wall portion of the rear housing 41 by a pressing metal fitting 46 at the end portion.
  • the stretchable wiring 8 is also called a spring cable, and a plurality of electric wires are collectively covered with a resin curl cord 85.
  • the stretchable wiring 8 is used in a place where expansion and contraction is required, and has a feature that it has excellent wear resistance and can withstand repeated use.
  • the shape of the stretchable wiring 8 will be further described with reference to FIG.
  • the stretchable wiring 8 is obtained by coating the outside of a plurality of wires (81, 85, etc.) with a resin curl cord 85 having a coiled portion that expands and contracts.
  • the switch line 83 and the LD line are not shown.
  • a straight lead portion 8a is formed at both ends of the curled portion 8b wound in a coil shape, and the curled portion 8b is mainly the portion that is curled and expands and contracts.
  • the expansion / contraction wiring 8 is arranged in the internal space of the fixed pipe 3a and the movable pipes 3b, 3c, and is wired so that the operator cannot see the expansion / contraction wiring 8 except for a part near the rotating portion 6.
  • the resin coating 81 b of the power supply line 81 is peeled off, and the exposed core wire 81 a is soldered to the connection terminal 45.
  • the power line 82 is soldered to the connection terminal 45.
  • Many ordinary curl cords 85 include only two power lines. However, in this embodiment, in addition to the power supply lines 81 and 82, the switch line 83 and the LD line (described later) for transmitting the LD signal output from the battery pack 70 are also covered with the curl cord 85.
  • the microcomputer recognizes that the operation is a speed switching signal for switching the rotation speed of the motor 13.
  • the rotational speed of the motor 13 is set, for example, in three stages, and can be set from speed 1 (low speed) to speed 3 (high speed).
  • speed 1 low speed
  • speed 3 high speed
  • the rotation speed of the motor 13 is increased by pushing the operation switch 44 for a long time.
  • the set rotation speed changes from speed 1 ⁇ speed 2 ⁇ speed 3 and when the operation switch 44 is pressed for a long time at speed 3, the speed returns to speed 1.
  • the rotation speed of the motor 13 is not limited to the operation unit 51 switching according to the output form of the operation signal of the operation switch 44, and a rotation dial for adjusting the rotation speed is provided on the rear housing 41 or the front housing 11. You may make it provide. However, if speed adjusting means is provided in the rear housing 41, it is necessary to further include a speed adjusting connection line in the telescopic wiring 8, and the number of connection lines increases.
  • FIG. 6 is a block diagram showing the configuration of the drive control system of the motor 13.
  • the motor 13 is a three-phase brushless motor.
  • This brushless motor is a so-called inner rotor type, and includes a rotor (rotor) 13a including a plurality of sets (two sets in this embodiment) of permanent magnets (magnets) including N poles and S poles, A stator 13b composed of star-connected three-phase stator windings U, V, and W, and 3 arranged at predetermined intervals in the circumferential direction, for example, at an angle of 60 °, in order to detect the rotational position of the rotor 13a.
  • Two rotational position detecting elements 24 are provided. Based on the position detection signals from these rotational position detection elements 24, the energization direction and time to the stator windings U, V, W are controlled, and the motor 13 rotates.
  • the calculation unit 51 is a central processing unit (CPU) for outputting a drive signal based on a processing program and data, a ROM for storing processing programs and control data, and a temporary storage for data. It includes a RAM, a timer, etc., and can be configured by, for example, a general-purpose microcomputer. The calculation unit 51 controls the driving of the switching elements Q1 to Q6.
  • the gates of the six switching elements Q1 to Q6 connected in a bridge are connected to the control signal output circuit 52, and the drains or sources of the six switching elements Q1 to Q6 are star-connected stator windings. Connected to U, V, W.
  • the six switching elements Q1 to Q6 perform a switching operation by a switching element drive signal (a drive signal such as H4, H5, H6, etc.) input from the control signal output circuit 52, and the DC voltage of the battery pack 70 is three-phase ( (U phase, V phase and W phase) Electric power is supplied to the stator windings U, V and W as voltages Vu, Vv and Vw.
  • the three negative power supply side switching elements Q4, Q5, Q6 are converted into pulse width modulation signals (PWM signals) H4,
  • PWM signals pulse width modulation signals
  • the amount of power supplied to the motor 13 by changing the pulse width (duty ratio) of the PWM signal based on the set rotation speed by the calculation unit 51 that is supplied as H5 and H6 and mounted on the control circuit board 25. Is adjusted to control the start / stop of the motor 13 and the rotation speed.
  • the current value supplied to the motor 13 is measured by the current detection circuit 53 using the shunt resistor 62, and the value is fed back to the calculation unit 51, so that the set drive power is adjusted.
  • the voltage of the battery pack 70 is measured by the voltage detection circuit 54 at both ends, and the output is fed back to the calculation unit 51.
  • Capacitor 61 suppresses the application of peak current when switching elements Q1-Q6 are turned on or off.
  • the output of the operation switch 44 is transmitted to the switch operation detection circuit 55 and the applied voltage setting circuit 56.
  • the switch operation detection circuit 55 detects the first operation of the operation switch 44 and activates the microcomputer when the microcomputer of the calculation unit 51 is in the sleep state.
  • the applied voltage setting circuit 56 transmits a “1 (switch ON)” or “0 (switch OFF)” signal to the calculation unit 51 in accordance with the operation of the operation switch 44.
  • the calculation unit 51 monitors the duration of the “1” signal and determines whether the signal is for turning the motor on or off or for switching the rotation speed of the motor 13 when the signal falls.
  • the rotational position detection circuit 57 detects an edge where the signal from one of the rotational position detection elements 24 is switched from Low to High, and outputs the detected position information to the calculation unit 51.
  • the rotation speed detection circuit 58 detects the rotation speed of the rotor using the signal from the rotation position detection circuit 57 and outputs it to the calculation unit 51. Note that the function of the rotation speed detection circuit 58 may be realized by software in the calculation unit 51 using a microcomputer.
  • the LED drive circuit 59 is a drive circuit that turns on the LED, and by supplying a direct current voltage (not shown) to the LED 60, one or a plurality of LEDs that are provided, light emission colors, various light emission patterns, and the like are realized. The lighting of these LEDs 60 is controlled by the calculation unit 51 transmitting a control signal to the LED drive circuit 59.
  • the calculation unit 51 has a function of protecting the battery pack 70 and the motor from overcurrent and overvoltage, and forcibly cuts off the electric power supplied to the motor when the overcurrent and overvoltage are detected. Is also performed to brake the rotation of the motor 13.
  • the LD signal of the battery pack 70 is transmitted to the calculation unit 51, and the calculation unit 51 detects an abnormal state due to the LD signal or detects an abnormal current by the current detection circuit 53. Then, the rotation of the motor 13 is stopped.
  • FIG. 8 is a diagram for explaining a wiring state from the grip portion 4 to the drive portion 2. It is important that the stretchable wiring 8 wired inside the collar portion 3 is made as light as possible by making the curl cord 85 as a covering portion thinner. Therefore, in this embodiment, the number of lines (power supply lines, connection lines) arranged inside is reduced as much as possible.
  • the switch line 83 connected to the control circuit 25 The number of LD wires 84 is limited to four. It should be noted that the negative line 86 of the switch line 83 and the negative line of the LD line are connected to a common ground with the negative power line 82.
  • the power supply lines 81 and 82 are connected to the inverter circuit 65 in the front housing 11, and the switch line 83 and the LD line 84 are connected to the control circuit board 25.
  • the LD wire 84 is included in the stretchable wiring 8, but the LD line 84 may be reduced because the same control is possible without using the LD signal.
  • the on / off control of the motor 13 and the rotation speed are set by the operation switch 44 provided in the rear housing 41.
  • a multifunctional mobile phone such as a smartphone, a personal digital assistant, an ultra-small personal computer or the like is used as an instruction device or an input / output device, and the switch of the motor 13 is turned on / off using wireless communication. Operation and speed setting of the motor 13 are performed.
  • the smartphone 200 includes a wireless communication unit based on a short-range wireless communication standard for digital devices, for example, and includes a liquid crystal display panel including a touch-type input mechanism.
  • mounting bases 131a and 131b are provided on the fixing pipe 3a on the front side of the rear housing 141.
  • the attachment bases 131a and 131b are obtained by fixing a holder holding the lower side and the upper side of the smartphone 200 to a belt-like fastening member along the outer periphery of the fixed pipe 3a.
  • the smartphone 200 can be arbitrarily attached or detached.
  • Various standards are known as wireless communication standards. For example, widely used Bluetooth (Note: Bluetooth is a registered trademark of Bluetooth SIG, Inc., USA) can be used.
  • the control circuit board 125 of the work tool 1 is also provided with the wireless communication means so that the arithmetic unit and the smartphone 200 can perform bidirectional communication via the wireless communication means.
  • an operation switch may be provided on the rear housing 41 side, and the smartphone 200 may be operated.
  • the operation switch may be provided on the front housing side and the smartphone 200 may be operated.
  • the operation switch itself may be omitted, and the smartphone 200 may be operated.
  • the example of the polisher using the polishing member 23 as the work tool has been described.
  • the battery pack is used as the power supply unit.
  • a commercial power source supplied by a power cord may be used as a work tool having a power supply unit including a rectifier circuit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)

Abstract

Selon la présente invention, un outil de travail comprenant une tige télescopique rend efficace un câblage d'un commutateur d'actionnement de moteur à un circuit de commande et un circuit inverseur, et réduit le nombre de fils de connexion nécessaires. A cet effet, l'invention porte sur un outil de travail, lequel outil comprend une section de baguette extensible (3), et lequel commande un moteur sans balais (13) disposé sur la pointe de la section de baguette par un bloc de batterie (70) disposé sur une section de saisie (4), le circuit de commande et le circuit inverseur étant disposés sur une carte de circuits imprimés de commande (25) à proximité du moteur sans balais, et un commutateur de moteur (44) étant disposé sur un boîtier arrière (41). Le fil de connexion pour connecter le commutateur au circuit de commande est recouvert par un cordon enroulé avec un fil de source d'alimentation du bloc de batterie pour former un câblage extensible (8). La section de baguette est constituée à partir d'un tuyau creux et le cordon enroulé est disposé à l'intérieur de la section de baguette.
PCT/JP2016/068988 2015-07-18 2016-06-27 Outil de travail Ceased WO2017014008A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-143516 2015-07-18
JP2015143516 2015-07-18

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EP3108481A4 (fr) * 2014-02-19 2017-10-11 Husqvarna AB Douille mécanique pour centrer un câble en hélice
WO2019003741A1 (fr) * 2017-06-30 2019-01-03 工機ホールディングス株式会社 Outil électrique
GB2590686A (en) * 2019-12-23 2021-07-07 Black & Decker Inc Pole sander
JP2023539914A (ja) * 2020-09-09 2023-09-20 フェストール・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング 電動工具のための起動モード

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JP2014023542A (ja) * 2013-11-07 2014-02-06 Hitachi Koki Co Ltd 作業機械
JP2014037080A (ja) * 2012-08-15 2014-02-27 Hitachi Koki Co Ltd チェーンソー
JP2015082991A (ja) * 2013-10-25 2015-04-30 日立工機株式会社 打撃工具
JP2015095410A (ja) * 2013-11-13 2015-05-18 河村電器産業株式会社 押しボタンスイッチ構造
JP2015127114A (ja) * 2013-12-27 2015-07-09 日立工機株式会社 電動かんな

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Publication number Priority date Publication date Assignee Title
JP2014037080A (ja) * 2012-08-15 2014-02-27 Hitachi Koki Co Ltd チェーンソー
JP2015082991A (ja) * 2013-10-25 2015-04-30 日立工機株式会社 打撃工具
JP2014023542A (ja) * 2013-11-07 2014-02-06 Hitachi Koki Co Ltd 作業機械
JP2015095410A (ja) * 2013-11-13 2015-05-18 河村電器産業株式会社 押しボタンスイッチ構造
JP2015127114A (ja) * 2013-12-27 2015-07-09 日立工機株式会社 電動かんな

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3108481A4 (fr) * 2014-02-19 2017-10-11 Husqvarna AB Douille mécanique pour centrer un câble en hélice
WO2019003741A1 (fr) * 2017-06-30 2019-01-03 工機ホールディングス株式会社 Outil électrique
GB2590686A (en) * 2019-12-23 2021-07-07 Black & Decker Inc Pole sander
JP2023539914A (ja) * 2020-09-09 2023-09-20 フェストール・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング 電動工具のための起動モード

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