WO2019187992A1 - Electric work machine - Google Patents

Electric work machine Download PDF

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Publication number
WO2019187992A1
WO2019187992A1 PCT/JP2019/008185 JP2019008185W WO2019187992A1 WO 2019187992 A1 WO2019187992 A1 WO 2019187992A1 JP 2019008185 W JP2019008185 W JP 2019008185W WO 2019187992 A1 WO2019187992 A1 WO 2019187992A1
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WO
WIPO (PCT)
Prior art keywords
stator core
teeth
insulator
motor
working machine
Prior art date
Application number
PCT/JP2019/008185
Other languages
French (fr)
Japanese (ja)
Inventor
内藤　晃
Original Assignee
株式会社 マキタ
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 株式会社 マキタ filed Critical 株式会社 マキタ
Publication of WO2019187992A1 publication Critical patent/WO2019187992A1/en

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/76—Driving mechanisms for the cutters
    • A01D34/78—Driving mechanisms for the cutters electric
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Definitions

  • the present invention relates to an electric working machine such as an electric tool, a gardening tool such as a lawn mower, and an air compressor for an air tool.
  • Patent Document 1 The brushless motor disclosed in Japanese Patent No. 5861109 (Patent Document 1) is coated with an insulating member that covers an inner peripheral surface of a cylindrical portion and a plurality of tooth portions protruding from the inner surface of the stator core, and an insulating member. And a coil wound around the tooth portion.
  • a ventilation groove is provided in a portion of the insulating member that covers the inner peripheral surface between the teeth adjacent in the circumferential direction.
  • the stator core and the insulating member which are separate from each other, are combined. Therefore, a process for assembling the stator iron core and the insulating member is required at the time of manufacture, and there is room for improvement in the assemblability of the brushless motor, which affects the assemblability of the electric working machine in which the brushless motor is used.
  • the shape of the insulating member for mounting on the stator core and the insulating member becomes relatively large in order to secure the necessary insulation distance, and accordingly the brushless motor and thus the electric work machine are large. As a result, the area occupied by the stator iron core and the coil is reduced accordingly, and the output of the brushless motor and thus the electric working machine is reduced.
  • a main object of the present invention is to provide an electric working machine including a motor in which an insulator is integrally formed with a stator core in a state where molding defects are prevented.
  • the invention according to claim 1 includes a motor having a stator core, an insulator formed integrally with the stator core, a plurality of coils held by the insulator, and a rotor rotatable with respect to the stator core.
  • the surface of the stator core that contacts the insulator is provided with a recess that is recessed with respect to other portions.
  • the stator core has a plurality of teeth arranged inside the coil, and the insulator has a teeth covering portion that covers the teeth. The recess is provided in the tooth.
  • the teeth protrude radially inward from the inner peripheral surface of the cylindrical portion of the stator core, and the concave portions are provided on a plurality of surfaces of the teeth, respectively.
  • the recesses are shifted from each other in the radial direction.
  • the invention according to claim 4 is characterized in that, in the above-mentioned invention, the recess is provided in a portion between the teeth.
  • the invention according to claim 5 is characterized in that, in the above-described invention, a groove extending in the axial direction of the stator core having a cylindrical portion is formed in a portion of the teeth covering portion that covers the root of the tooth. Is.
  • the invention according to claim 6 includes a motor having a stator core, an insulator integrally formed with the stator core, a plurality of coils held by the insulator, and a rotor rotatable with respect to the stator core.
  • the insulator is provided with a protruding portion that protrudes with respect to the other portion.
  • the invention according to claim 7 is characterized in that, in the above-mentioned invention, the surface of the stator core that comes into contact with the insulator is provided with a recess that is recessed with respect to another portion.
  • the invention according to claim 8 is characterized in that, in the above invention, a coil connection conducting wire is formed between the plurality of coils, and the coil connection conducting wire is in contact with an upright surface of the convex portion.
  • the invention according to claim 9 is the above invention, wherein the stator core has a plurality of teeth arranged inside the coil and arranged in the circumferential direction, and the insulator is a cylinder covering between the plurality of teeth.
  • the convex part is provided in the cylindrical part.
  • the stator core has a plurality of teeth disposed inside the coil, and the insulator has a teeth covering portion that covers the teeth.
  • the convex portion is provided on the teeth covering portion.
  • a groove extending in the axial direction of the stator core having a cylindrical portion is formed in a portion of the tooth covering portion that covers the root of the tooth. Is.
  • the main effect of the present invention is to provide an electric working machine including a motor in which an insulator is integrally formed with a stator core in a state where molding defects are prevented.
  • FIG. 2 is a partially enlarged view of FIG. 1. It is a perspective view of the motor in the lawn mower of FIG. It is a center longitudinal cross-sectional view of the motor of FIG.
  • FIG. 4 is a perspective view of a stator core assembly in the motor of FIG. 3.
  • FIG. 6 is a cross-sectional view of the stator core assembly of FIG. 5 and the coil of FIG. 4.
  • FIG. 6 is a cross-sectional view of the stator core assembly of FIG. 5.
  • FIG. 6 is a top view of a stator core in the stator core assembly of FIG. 5.
  • FIG. 8 is a view corresponding to FIG.
  • FIG. 7 of a lawn mower according to a second embodiment of the present invention It is a FIG. 8 equivalent view of the lawn mower which concerns on the 2nd form of this invention.
  • FIG. 6 is a view corresponding to FIG. 5 of a lawn mower according to a third embodiment of the present invention.
  • FIG. 8 is a view corresponding to FIG. 7 of a lawn mower according to a third embodiment of the present invention.
  • FIG. 9 is a view corresponding to FIG. 8 of a lawn mower according to a third embodiment of the present invention.
  • FIG. 1 is a central longitudinal sectional view of a rechargeable lawn mower 1 which is an example of an electric working machine (gardening tool) according to a first embodiment of the present invention.
  • FIG. 2 is a partially enlarged view of FIG.
  • the lawn mower 1 includes a main body part 2 and a frame-shaped handle part 4 extending obliquely rearward and upward from the rear part. The direction is based on the user gripping the handle portion 4, the left of FIG. 1 is the front of the lawn mower 1, and the top of FIG. 1 is the top of the lawn mower 1.
  • the main body 2 includes a box-shaped main body housing 10 that opens downward and directly holds various members, wheels 12 that are rotatably arranged at the four corners, and one battery pack 14.
  • two battery mounting portions 16 that can be mounted and formed in the upper portion of the main body housing 10, a flat box-shaped controller 18 that is held in a state of spreading vertically and horizontally in the front portion of the main body housing 10, ,
  • a spindle 26 as a vertically extending output shaft connected to a motor shaft 22 of the motor 20 directed downward through a bolt 24, and a horizontal ring-shaped inner flange 27.
  • a horizontal plate-shaped cutting blade 30 (tip tool) connected to the lower portion of the spindle 26 via a vertically extending bolt 28.
  • the motor shaft 22, the bolt 24, the spindle 26, the inner flange 27, the bolt 28, and the cutting blade 30 are coaxial with each other.
  • a speed reduction mechanism, a speed increasing mechanism, or a power direction conversion mechanism may be disposed between the motor shaft 22 and the cutting blade 30, and at least one of the motor shaft 22 or the cutting blade 30 is in relation to other members. It does not have to be coaxial.
  • the spindle 26 may be omitted. At least one of the spindle 26 and the cutting blade 30 may be connected other than by bolting.
  • a switch lever 32 having a “L” shape in a side view and a reverse “U” shape in a rear view can be pulled on the handle portion 4 by a user via a left and right lever connecting portion 34 (around a left and right axis). Can be rotated).
  • a lock-off button 36 that protrudes inward from the inner surface of the right lever connecting portion 34 and that can be pushed by the user is provided on the inner surface side of the right lever connecting portion 34.
  • the lock-off button 36 When the user presses the lock-off button 36, the switch lever 32 can be pulled.
  • the switch lever 32 returns to the front without being pulled unless the lock-off button 36 is pushed.
  • the lock-off button 36 is locked to the switch lever 32 that is not pulled, and the lock is released by movement by a push operation.
  • the battery mounting part 16 of the main body 2 has a front-lowering mounting surface, and the battery pack 14 is slid forward from the rear side with respect to at least one of the left part and the right part of the mounting surface. Installed.
  • the mounting surface may be front-up or horizontal.
  • one or three or more battery packs 14 may be attached to the battery attachment portion 16.
  • the sliding direction of the battery pack 14 may be rearward or left-right direction.
  • the battery pack 14 may be attached by means other than sliding, such as insertion into a battery case.
  • the controller 18 includes a flat box-like controller case 40 opened rearward, and a control circuit board 42 that is held inside and extends in the vertical and horizontal directions.
  • the controller 18 (control circuit board 42) is connected to a mounting portion side terminal (not shown) arranged in the battery mounting portion 16 by a lead wire (power supply line) (not shown).
  • the mounting portion side terminal is connected to a battery side terminal (not shown) of the mounted battery pack 14.
  • the controller 18 (control circuit board 42) is equipped with a microcomputer (not shown) and a switching element (not shown) for controlling the motor 20 and the like.
  • controller 18 (control circuit board 42) is connected to a main switch (not shown) connected to the switch lever 32 and switched by the switch lever 32 by a lead wire (switch signal line) not shown.
  • the controller 18 may control only the motor 20.
  • the controller 18 (control circuit board 42) is electrically connected to a lock switch connected to the lock-off button 36. If the lock switch is not in a switching state corresponding to pressing of the lock-off button 36, the main switch Even if it is ON, the motor 20 may not be rotated.
  • the motor 20 also shown in FIGS. 3 and 4 is a brushless motor and is a DC (rechargeable) motor driven by the battery pack 14.
  • the motor 20 includes a cylindrical stator 50 whose axial direction is the vertical direction, and a cylindrical rotor 52 that is disposed inside the stator 50 and is rotatable with respect to the stator 50, and is an inner rotor type. ing.
  • the motor 20 may be a motor with a brush, or may be an outer rotor type in which a cylindrical rotor is disposed outside a columnar stator.
  • the motor 20 may be an AC (AC type) motor instead of the DC motor.
  • the upper and lower sides of the stator 50 are covered with cylindrical motor covers 54, respectively.
  • Each motor cover 54 is connected at intervals by a plurality (three) of bolts 55 extending in the vertical direction.
  • a plurality (three) of power supply lines 56 and a plurality (six) of signal lines 57 protrude from the holes provided in the upper motor cover 54.
  • the motor 20 is electrically connected to the controller 18 (control circuit board 42) through the power supply line 56 and the signal line 57.
  • the rotor 52 is provided with a motor shaft 22 in the vertical direction arranged at the axis. The lower end portion of the motor shaft 22 is exposed to the lower side of the upper motor cover 54 and has a hole for the bolt 24 inside.
  • the upper motor cover 54 holds an upper bearing 58 that supports the motor shaft 22 rotatably about the shaft.
  • a lower bearing 59 that supports the motor shaft 22 so as to be rotatable around the shaft is held in the lower motor cover 54.
  • the motor 20 is held by a motor housing 60 having a bowl-like shape opened downward and held in the main body housing 10, and a motor housing lid 64 arranged at the lower end of the motor 20 and held by the main body housing 10 with a plurality of screws 62.
  • Screw holes 65 through which screws 62 pass are respectively provided in the front left and right and rear left and right of the lower motor cover 54 so as to protrude radially outward.
  • a bowl-shaped spindle housing 66 opened upward is held by a plurality of screws 68 at the lower part of the motor housing lid 64.
  • the spindle housing 66 holds a spindle bearing 70 that rotatably supports the spindle 26 at the center in the lower part.
  • the lower end portion of the spindle 26 is exposed below the spindle housing 66 and has a hole for a bolt 28 inside.
  • the cutting blade 30 is sandwiched between the inner flange 27 and the bolt 28.
  • a cylindrical protrusion 72 is formed on the upper surface of the inner flange 27. The protrusion 72 receives the tip of the spindle 26.
  • the rotor 52 of the motor 20 includes a cylindrical rotor core 90 that is integrally attached to the central portion of the motor shaft 22 in a concentric state with the motor shaft 22, and a plurality of ( 8) plate-like permanent magnets 92 respectively disposed in the vertical through-holes.
  • the rotor core 90 is a laminated body in which a plurality of steel plates are laminated, and between the permanent magnets 92 and the motor shaft 22, a meat stealer 94 as a space portion that spreads in a quarter-cylindrical plane with the vertical direction as the axial direction is provided. , Have multiple (4).
  • the permanent magnets 92 are arranged in a regular octagonal cylinder as a whole, and are slightly separated from each other in the circumferential direction. Between the adjacent permanent magnets 92 in the circumferential direction, a flux barrier (not shown) that is a space protruding outward in the circumferential direction beyond the end of the permanent magnet 92 is formed at both ends of each through hole. ing.
  • the flux barrier is continuous with the through hole main body space through which the permanent magnet 92 passes, and is a part of the through hole.
  • the stator 50 of the motor 20 has a stator core assembly 110, a plurality (12) of coils 112, a terminal unit 114, and a sensor substrate 116.
  • the stator core assembly 110 includes a stator core 120 (FIG. 8) and an insulator 122 that is disposed on the top and bottom and inside of the stator core 120 and is held by the stator core 120, as shown in FIGS. 5 and 8.
  • the stator core 120 is a laminated body in which a plurality of ring-shaped steel plates are laminated. A plurality (12 pieces) of each of the stator cores 120 protrude radially inwardly and are arranged at equal intervals in the circumferential direction.
  • the teeth 126 are provided. The distal end portion on the radially inner side of each tooth 126 extends in the vertical and circumferential directions with respect to the other portions, and the distal end surface has a shape that swells inward.
  • a plurality of (four on each surface) groove-like recesses 127 extending in the vertical direction are formed on the surfaces on both sides in the circumferential direction (surfaces facing each other) extending in the vertical and radial directions in each tooth 126.
  • Each recess 127 is recessed inward in the circumferential direction, extends from the upper side of the surface (upper surface of the teeth 126) to the lower side (lower surface of the teeth 126), and penetrates the surfaces on both sides in the circumferential direction in the vertical direction.
  • the concave portions 127 on one surface are arranged at equal intervals.
  • Each concave portion 127 on one surface of each tooth 126 and each concave portion 127 on the other surface are displaced from each other in the radial direction. That is, an imaginary straight line extending in the circumferential direction from the recess 127 on one surface to the other surface reaches between the recesses 127 on the other surface.
  • the most radially inward concave portion 127 on one surface is formed at the base of the widened portion of the tip end portion of the tooth 126.
  • a space (slot) in which the coil 112 is disposed is formed between the teeth 126 adjacent in the circumferential direction.
  • Two outer grooves 128 and one outer rib 129 in the vertical direction are formed on the outer peripheral surface of the cylindrical portion 124 of the stator core 120.
  • Each outer groove 128 and outer rib 129 are arranged at equal intervals in the circumferential direction. Note that the arrangement of at least one of the outer grooves 128 and the outer ribs 129 may be changed, the number of the outer grooves 128 and the outer ribs 129 may be increased or decreased, and may be omitted.
  • the insulator 122 is a resin-made cylindrical electrical insulating portion, and includes a teeth covering portion 132 disposed on the outside of each tooth 126, a cylindrical portion 133 that connects the teeth covering portion 132 and protrudes up and down in a ring shape, It has.
  • Each tooth covering portion 132 covers a portion other than the tip end portion of the corresponding tooth 126, and has a wall portion 134 that extends in the vertical and circumferential direction sides from the other portion at the adjacent portion of the tip end portion of the tooth 126. is doing.
  • a groove 135 having a width corresponding to the thickness of the two windings of the coil 112 is formed in the portion covering each tooth covering portion 132 so as to extend in the vertical direction.
  • each tooth covering portion 132 has a line portion 136 that enters each concave portion 127 of the tooth 126.
  • a convex portion 137 extending in the vertical direction is formed on the inner peripheral surface of the cylindrical portion 133 and at the central portion between adjacent teeth 126 (in the slot).
  • Each convex portion 137 projects radially inward, extends from the upper side (the upper surface of the cylindrical portion 124) of the inner peripheral surface to the lower side (the lower surface of the cylindrical portion 124), and penetrates the inner peripheral surface in the vertical direction. .
  • a plurality of (five) screw boss portions 138 having upper and lower screw holes are formed on the upper portion of the cylindrical portion 133.
  • the screw boss portions 138 are arranged at equal intervals in the circumferential direction so as to be positioned at five vertices of a virtual regular hexagon, and any one of a total of 12 fusing terminal slots 140 is interposed between them. Two pieces (four pieces at one place) are arranged.
  • the fusing terminal slots 140 are arranged at equal intervals in the circumferential direction. One slot is located radially inward of each fusing terminal case 140.
  • Each fusing terminal case 140 has a pair of first and second protrusions 142 and 144 having a U-shaped cross section arranged in the circumferential direction.
  • the second protrusion 144 is disposed on the positive side in the clockwise direction from the first protrusion 142 in a top view.
  • the first protrusion 142 protrudes upward in a pair of radial inner and outer sides with respect to the other portions of the cylindrical portion 133.
  • the outer protruding portion related to the first protrusion 142 is disposed on the inner side of the outer periphery of the cylindrical portion 133, and is disposed on the inner side of the outer peripheral surface of the stator core 120.
  • the second protrusion 144 protrudes upward in a state where the upper part is adjacent to the inner protrusion of the first protrusion 142 in the circumferential direction with respect to the other part of the cylindrical part 133.
  • Each protrusion 137 is formed downward from between the first protrusion 142 and the second protrusion 144 in the corresponding fusing terminal case 140.
  • Stator core assembly 110 is formed by integrally molding stator core 120 and insulator 122.
  • the method of integral molding is not particularly limited, and is, for example, insert injection molding in which the resin is injected while the stator core 120 is inserted into a mold.
  • the insulator 122 passes from the lower side of the stator core 120 to the inner side (each tooth covering portion 132 and the cylindrical portion 133) excluding the tip end surface of the tooth 126, and then to the upper side of the stator core 120 (the screw portion 138 and the cylindrical portion 133 having the fusing terminal holder 140). Up to the overhanging upper part), they are arranged in series.
  • the insulator 122 (in particular, the inner surfaces of the teeth covering portion 132 and the cylindrical portion 133) is made as thin as possible from the viewpoint of compactness or improved output, on the premise of ensuring a predetermined insulation or more.
  • the resin is difficult to flow into each of the relatively thin teeth covering portions 132.
  • the teeth 126 of the stator core 120 are provided with the recesses 127 and the insulator 122 has the stripe portions 136, The path of the minute resin spreads, the resin more easily flows into each of the tooth covering portions 132, and the moldability of the insulator 122 becomes better.
  • the recesses 127 are provided on both circumferential surfaces of the teeth 126 of the stator core 120 that are in contact with the teeth covering portion 132 of the insulator 122. Further, when the insulator 122 is integrally formed, the resin hardly flows into the inner surface (slot peripheral surface) of the relatively thin cylindrical portion 133. Since the convex portion 137 is provided on the inner surface of the cylindrical portion 133, the passage of the resin is expanded accordingly. Thus, the resin easily flows into the inner surface of the cylindrical portion 133, and the moldability of the insulator 122 becomes better.
  • Each coil 112 is formed in the teeth coating portion 132 of the stator core assembly 110 by winding a winding. Corresponding teeth 126 and teeth covering portions 132 are arranged inside each coil 112.
  • the twelve coils 112 are delta-connected by three sets of coils 112 (three phases), with four as one set. In each set, two coils 112 and two coils 112 connected in series are connected in parallel (two series and two parallel).
  • Such twelve coils 112 are each formed by two conducting wires that are a series. That is, the first conducting wire is wound around the two teeth covering portions 132 from the start of the first winding, across the first projecting body 142 and the second projecting body 144 of the fusing terminal case 140, and the next fuse.
  • a coil connecting conductor 146 is formed between the coils 112. A part of each coil connection conducting wire 146 is in contact with the standing surface (circumferential end surface) of the convex portion 137. Further, the second conducting wire is wound in the same manner as the first conducting wire from the second winding start to the second winding end. However, it passes through the fusing terminal compartment 140 and the teeth covering portion 132 through which the first conductor does not pass.
  • the first roll of the tooth covering portion 132 is guided to the groove 135.
  • the conducting wire wound up to a predetermined winding is disposed between the cylindrical portion 133 and the wall portion 134 of the teeth covering portion 132 to become the coil 112.
  • the coil 112 is formed so as to be shifted from the convex portion 137 in the circumferential direction.
  • the width of the wound conducting wire is about two conducting wires (two windings), and is about the width of the groove 135 and the width of the wall portion 134.
  • the convex part 137 may be arrange
  • a plurality of convex portions 137 may be provided for each of the teeth 126.
  • the terminal unit 114 includes a terminal unit main body 150 made of a ring-like insulating resin having an inner hole, and a plurality (three pieces) of sheet metal members 152 each made of a conductive metal.
  • a plurality (five) of screw holes (not shown) having vertical screw holes are formed on the periphery of the terminal unit main body 150.
  • Each screw hole protrudes radially outward with respect to the other part, and is arranged in the same manner as the screw boss 138.
  • pin portions corresponding to the outer grooves 128 of the stator core 120, pin portions (not shown) that protrude radially outward and further downward are formed.
  • the terminal unit main body 150 is provided with a plurality (three) of screw boss portions 154 having screw holes opened upward. Each screw boss portion 154 is disposed at the front portion, the rear left portion, and the rear right portion of the terminal unit main body 150.
  • Each screw boss part 154 protrudes radially inward with respect to the other part of the terminal unit main body 150.
  • the front left part and the front right part of the terminal unit main body 150 are provided with protrusions (not shown) having upward protrusions. Each protrusion protrudes radially inward with respect to the other part of the terminal unit main body 150.
  • Each sheet metal member 152 has a semicircular arc shape and is a “C” -shaped member in a top view.
  • Each sheet metal member 152 is provided with a plurality of fusing terminals 160 protruding downward.
  • Each fusing terminal 160 has a tip portion that opens upward in an initial state (a state before fusing) with respect to the folded portion at the tip of the folded portion. 1 to 4, the fusing terminal 160 is shown in an initial state.
  • a connection piece (not shown) that protrudes rearward and has a connection hole is formed at the rear end portion of each sheet metal member 152.
  • the fusing terminals 160 of the respective sheet metal members 152 are arranged so as to be shifted from each other in the circumferential direction, and are arranged so as to correspond to the fusing terminal holders 140.
  • the terminal unit 114 is formed by integrally molding the terminal unit main body 150 and each sheet metal member 152 in the same manner as the stator core assembly 110.
  • the sheet metal members 152 are arranged in a concentric arc shape in the vertical direction that is the direction of their thickness without being in contact with each other.
  • Each fusing terminal 160 and each connection piece of each sheet metal member 152 protrude from the terminal unit main body 150.
  • Each connection piece is partitioned by a partition wall (not shown).
  • the terminal unit 114 is attached to the upper side of the insulator 122 by aligning each screw hole portion with the corresponding screw boss portion 138 and inserting a screw (not shown) therein. At this time, the lower end portion of each pin portion of the terminal unit 114 enters the corresponding outer groove 128 of the stator core 120, and the terminal unit 114 is reliably positioned with respect to the stator core assembly 110.
  • each of the fusing terminals 160 in the initial state enters between the first protrusion 142 and the second protrusion 144 in the corresponding fusing terminal case 140 and surrounds the crossover portion connecting the coils 112.
  • each fusing terminal 160 is closed and the crossover portion is sandwiched, the crossover portion and the corresponding fusing terminal 160 are welded by heat caulking. (Fusing), the coils 112 are connected to each other in a desired state, and a circuit of the coil 112 in the motor 20 is formed. Furthermore, the upper end of the screw boss portion 138 (the uppermost portion of the insulator 122) does not protrude from the upper surface of the attached terminal unit 114.
  • a power supply line 56 is connected to each connection piece of the terminal unit 114 via a screw boss and a screw (not shown) and a terminal plate. By such connection, a circuit of the coil 112 including the controller 18 and the battery mounting portion 16 is formed. Moreover, if each screw is removed, each power line 56 can be removed from each connection piece of the terminal unit 114 so as to be reconnectable.
  • the sensor substrate 116 is a ring-shaped substrate and has an outer diameter that fits inside the inner hole of the terminal unit body 150 in the radial direction.
  • the sensor board 116 is mounted with a plurality (three) of rotation detection elements (not shown) that detect the position of the permanent magnet 92 of the rotor 52 and output a rotation detection signal.
  • the sensor substrate 116 has a plurality of screw holes. Each screw hole is arranged so as to correspond to the screw boss portion 154 of the terminal unit main body 150.
  • the sensor substrate 116 has pin holes (not shown) on the left and right of the front part. Each pin hole is arranged so as to correspond to the protrusion of the protrusion of the terminal unit main body 150.
  • the left rear side of the sensor substrate 116 is formed as a straight line extending in an oblique direction, and a plurality of signal lines 57 for transmitting a rotation detection signal of the rotation detection element are provided inside the sensor board 116 via a connector (not shown). It is connected. When the connection at the connector is released, the signal line 57 is detached from the sensor substrate 116 so as to be reconnectable.
  • the sensor substrate 116 is attached to the terminal unit 114 by overlapping the screw holes and the screw boss portions 154 of the terminal unit 114 and inserting screws 162 from above.
  • Each pin hole of the sensor board 116 has a protrusion of a corresponding protrusion of the terminal unit 114, and the sensor board 116 is positioned with respect to the terminal unit 114.
  • the rotation of the rotor 52 causes the motor shaft 22 to rotate.
  • the rotation of the motor shaft 22 is transmitted to the spindle 26, and a rotational force is applied to the cutting blade 30 mounted on the spindle 26.
  • the lawn mower 1 performs an operation of mowing the lawn with a cutting blade 30 rotated horizontally (parallel to the ground) around a vertical axis (rotary blade type).
  • the user pushes the handle portion 4 forward to cause the lawn mower 1 to travel on the grassy ground via the wheels 12 and to cut the grass and prepare the grass surface.
  • the lawn mower 1 includes a motor 20 having a stator core 120, an insulator 122 integrally formed with the stator core 120, a plurality of coils 112 held by the insulator 122, and a rotor 52 that can rotate with respect to the stator core 120.
  • the surface of the stator core 120 that contacts the insulator 122 is provided with a recess 127 that is recessed with respect to other portions. Therefore, when the insulator 122 is integrally molded, the resin also flows into the recess 127, and the resin is easily spread accordingly.
  • the stator core 120 has a plurality of teeth 126 disposed inside the coil 112
  • the insulator 122 has a teeth covering portion 132 that covers the teeth 126, and the recess 127 is formed on the teeth 126.
  • the fluidity of the resin in the tooth covering portion 132 that is easily thinned to ensure compactness and output is improved, and the molding failure of the insulator 122 is further effectively prevented.
  • the teeth 126 protrude radially inward from the inner peripheral surface of the cylindrical portion 124 of the stator core 120, and the recesses 127 are provided on both surfaces of the stator core 120 in the circumferential direction of the teeth 126, respectively.
  • the recesses 127 are offset from each other in the radial direction. Therefore, the width of the teeth 126 in the circumferential direction is ensured larger than that in the case where the recesses 127 for improving formability are provided, and the magnetic flux in the vicinity of the recesses 127 in the stator core 120 is secured. Is not inhibited as much as possible, and the decrease in output is suppressed as much as possible.
  • the lawn mower 1 includes a stator core 120, an insulator 122 formed integrally with the stator core 120, a plurality of coils 112 held by the insulator 122, and a rotor 52 that can rotate with respect to the stator core 120. 20, and the insulator 122 is provided with a convex portion 137 that protrudes with respect to other portions. Therefore, when the insulator 122 is integrally molded, the resin flows into the space in the mold corresponding to the convex portion 137, and the resin is easily spread accordingly, so that the lawn mower 1 is in the insulator core 120 with the molding defect prevented.
  • the motor 20 with which 122 is integrally formed will be provided.
  • the stator core 120 has a plurality of teeth 126 arranged inside the coil 112 and arranged in the circumferential direction.
  • the insulator 122 has a cylindrical portion 133 that covers between the plurality of teeth 126, and is convex.
  • the part 137 is provided in the cylindrical part 133. Therefore, the space for the coil 112 outside the teeth 126 is not reduced, and the convex portion 137 for good molding is provided without overlapping with the sufficiently large coil 112.
  • the lawn mower 1 has both the concave portion 127 of the stator core 120 and the convex portion 137 of the insulator 122 in the stator core assembly 110. Therefore, the lawn mower 1 is provided that includes the motor 20 in which the insulator 122 is integrally formed with the stator core 120 in a state in which the resin is sufficiently easily flown at the time of integral molding of the insulator 122 and molding defects are prevented.
  • At least one of the concave portion 127 and the convex portion 137 may be omitted.
  • the number of at least one of the concave portion 127 and the convex portion 137 may be increased or decreased.
  • the concave portion 127 may be disposed on either one of the surfaces of the teeth 126 on both sides in the circumferential direction, or may be disposed on a contact portion between the other stator core 120 and the insulator 122.
  • the recesses 127 may be provided on the upper and lower surfaces of the teeth 126 facing each other.
  • the concave portion 127 on the upper surface and the concave portion 127 on the lower surface may be shifted from each other in the radial direction. That is, an imaginary straight line extending downward from the recess 127 on the upper surface may reach between the recesses 127 on the lower surface.
  • the concave portion 127 may be provided on the upper surface and the side surface (surface extending in the vertical and radial directions) of the tooth 126, or may be provided on the lower surface and the side surface of the tooth 126.
  • the one recess 127 and the other recess 127 may be shifted from each other in the radial direction.
  • each recess 127 on one surface of each tooth 126 and at least a part of each recess 127 on the other surface may not be shifted from each other in the radial direction.
  • the convex portion 137 may be disposed at another portion on the surface of the insulator 122.
  • An insulator 122 may be disposed on the outer peripheral surface of the stator core 120. In this case, at least one of the concave portion 127 and the convex portion 137 may be disposed on at least one of the outer peripheral surface of the stator core 120 and the insulator 122.
  • the housing at least any two of the main body housing 10, the motor housing 60, and the spindle housing 66 may be integrated, or at least one of these housings may be further divided.
  • the detachable connection of the power supply line 56 can be made by a claw (connection projection part) and a claw receiver (connected part) instead of or together with screwing.
  • the sensor substrate 116 may be attached to the insulator 122 without being attached to the terminal unit 114.
  • the sensor substrate 116 may be attached to both the terminal unit 114 and the insulator 122.
  • the insulator 122 may have a plurality of portions instead of a series.
  • At least one of the power supply line 56, the conductive line related to the coil 112, the signal line 57, and other lead wires is such that the coil connection conductive wire 146 is a separate lead wire from the coil 112 and is electrically connected to each other.
  • a plurality of short lines may be electrically connected.
  • a power cord is provided in place of the battery mounting portion 16 to drive a commercial power source, or at least one of the number of the coil 112, the fusing terminal 160, and the power source line 56 is increased or decreased, or a groove that guides the conductive wire of the coil 112 Is provided so as to go around the base of the teeth covering portion 132, the groove is made smaller or shorter, the number of various screws and screw holes is increased or decreased, or at least the protrusions and holes of the terminal unit 114 One number is increased or decreased, the number of engaging portions (pin portions) of the terminal unit 114 with respect to the stator core 120 is increased, or the engagement of these engaging portions and engaged portions is the rib between the pair of protrusions.
  • the present invention can be applied to other types of lawn mowers, such as a reel blade mold, which is a cylindrical reel blade that rotates about the left and right direction as an axial direction, and other electric working machines. May be applied.
  • a reel blade mold which is a cylindrical reel blade that rotates about the left and right direction as an axial direction, and other electric working machines. May be applied.
  • the present invention is applied to a high-power product, and is an air compression for a chain saw, blower, or grinder in a power tool, a mower or hedge clipper in a garden tool, or an air tool powered by air.
  • a device for operating a working machine that performs work such as an air compressor for an air tool, is included in the electric working machine.
  • the above-described effects of the present invention are particularly remarkable in a relatively large brushless motor (the outer diameter (diameter) of the stator core 120 is, for example, 80 mm or more).
  • FIG. 9 is a view corresponding to FIG. 7 of a lawn mower according to the second embodiment of the present invention.
  • FIG. 10 is a view corresponding to FIG. 8 of a lawn mower according to the second embodiment of the present invention.
  • the lawn mower according to the second embodiment is the same as the first embodiment except for the stator core assembly. Members and portions that are the same as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.
  • the stator core 220 of the stator core assembly 210 is the same as the stator core 120 of the first embodiment except that a second recess 227 is added.
  • a plurality of (five surfaces) groove-shaped second concave portions 227 extending in the vertical direction are formed.
  • the second recesses 227 are arranged at equal intervals in the circumferential direction, and the second recesses 227 at both ends in the circumferential direction are disposed below the groove 135 of the cylindrical portion 233 of the insulator 222 of the stator core assembly 210. Yes.
  • Each second recess 227 penetrates the inner peripheral surface in the vertical direction.
  • Each part between the teeth 126 of the cylindrical part 233 has the 2nd stripe
  • the lawn mower according to the second embodiment includes a stator core 220, an insulator 222 formed integrally with the stator core 220, a plurality of coils 112 held by the insulator 222, and a rotor 52 that can rotate with respect to the stator core 220.
  • a surface of the stator core 220 that is in contact with the insulator 222 is provided with a second recess 227 that is recessed with respect to other portions, and the second recess 227 is provided in a portion between the teeth 126. . Therefore, when the insulator 222 is integrally molded, the resin also flows into the second recess 227, and the resin easily spreads accordingly.
  • the insulator 222 is attached to the stator core 220 in a state where molding defects are prevented.
  • a motor that is integrally molded is provided.
  • the said 2nd form has a modification similar to a 1st form suitably.
  • the second recesses 227 do not have to be arranged at equal intervals in the circumferential direction, and may not be arranged below the groove 135.
  • the number of the second recesses 227 may be increased or decreased from five on each surface, and may be different for each surface (for each tooth 126). Only the second concave portion 227 may be provided, and at least one of the concave portion 127 (first concave portion) and the convex portion 137 may be omitted.
  • FIG. 11 is a view corresponding to FIG. 5 of a lawn mower according to the third embodiment of the present invention.
  • FIG. 12 is a view corresponding to FIG. 7 of a lawn mower according to the third embodiment of the present invention.
  • FIG. 13 is a view corresponding to FIG. 8 of a lawn mower according to a third embodiment of the present invention.
  • the lawn mower according to the third embodiment is the same as the first embodiment except for the stator core assembly. Members and portions that are the same as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.
  • the stator core 320 of the stator core assembly 310 is the same as the stator core 120 of the first embodiment except that the recess 127 is omitted from the teeth 326.
  • the surfaces on both sides in the circumferential direction of the teeth 326 are flat.
  • the teeth covering portion 332 of the insulator 322 of the stator core assembly 310 does not have the stripe portion 136.
  • the 2nd convex part 337 which protrudes on the circumferential direction outer side with respect to another part is extended on the surface of the both sides of the circumferential direction in the teeth coating
  • the second convex portions 337 are arranged at equal intervals in the radial direction, and the second convex portions 327 at both ends in the radial direction are adjacent portions of the groove 135 of the cylindrical portion 133 or the wall portion of the teeth covering portion 332. It is arrange
  • Each 2nd convex part 337 has penetrated the surface of the circumferential direction both sides in teeth covering part 332 in the up-and-down direction.
  • the lawn mower according to the third embodiment includes a stator core 320, an insulator 322 formed integrally with the stator core 320, a plurality of coils 112 held by the insulator 322, and a rotor 52 rotatable with respect to the stator core 320.
  • a motor is provided, and the insulator 322 is provided with second protrusions 337 that protrude outward from the surfaces on both sides in the circumferential direction of the teeth covering portion 332 that covers the teeth 326 of the stator core 320.
  • the insulator 322 when the insulator 322 is integrally molded, the resin flows into the space in the mold corresponding to the second convex portion 337, and the resin is easily spread accordingly, and the lawn mower according to the third embodiment is in a state where molding defects are prevented.
  • a motor in which the insulator 322 is integrally formed with the stator core 320 is provided.
  • the second convex portion 337 is provided in the teeth covering portion 332 in a state of extending in the vertical direction that is the winding direction of the coil 112, the winding of the coil 112 can be placed along the second convex portion 337, The winding of the coil 112 is appropriately wound in a state where the occurrence of bending is prevented.
  • the said 3rd form has a modification similar to the 1st form and the 2nd form suitably.
  • the second convex portions 337 may not be arranged at equal intervals in the radial direction, and may not be arranged at an adjacent portion of the groove 135 or an adjacent portion of the wall portion 134.
  • the number of the 2nd convex parts 337 may be increased / decreased from six each surface, and may differ for every surface.
  • Both the second convex portion 337 and the concave portion 127 (streak portion 136) may be provided, or both the second convex portion 337 and the second concave portion 227 (second stripe portion 236) may be provided.
  • the second convex portion 337, the concave portion 127, and the second concave portion 227 may be provided, or the convex portion 137, the second convex portion 337, the concave portion 127, and the second concave portion 227 may be provided.
  • Lawn mower (garden tools, electric working machine), 20. Motor, 52. Rotor, 112, Coil, 120, 220, 320, Stator core, 122, 222, 322, Insulator, 126, 326 .. Teeth, 127 .. concave portion, 132, 332 .. Teeth covering portion, 133 .. cylindrical portion, 137 .. convex portion, 227 .. second concave portion, 337 .. second convex portion.

Abstract

[Problem] To provide an electric work machine provided with a motor in which an insulator is integrally formed into a stator core in a state of preventing molding defect. [Solution] A lawn mower, which is an example of this electric work machine, is provided with a motor which has: a stator core 120; an insulator 122 integrally formed into the stator core 120; a plurality of coils 112 held in the insulator 122; and a rotor which is rotatable with respect to the stator core 120. A recess section 127 recessed with respect to other sections is provided in a surface coming into contact with the insulator 122in the stator core 120.

Description

電動作業機Electric working machine
　本発明は、電動工具、芝刈機を始めとする園芸工具、及びエア工具用空気圧縮機等の電動作業機に関する。 The present invention relates to an electric working machine such as an electric tool, a gardening tool such as a lawn mower, and an air compressor for an air tool.
　特許第５８６１１０９号公報（特許文献１）に示されたブラシレスモータは、ステータ鉄心における円筒部の内周面及びそこから突出した複数の歯部を被覆する絶縁性部材と、絶縁性部材で被覆された歯部に巻き付けられるコイルと、を備えている。
　絶縁性部材のうち、周方向に隣り合う歯部間の内周面を被覆する部分には、通風用溝部が設けられている。 The brushless motor disclosed in Japanese Patent No. 5861109 (Patent Document 1) is coated with an insulating member that covers an inner peripheral surface of a cylindrical portion and a plurality of tooth portions protruding from the inner surface of the stator core, and an insulating member. And a coil wound around the tooth portion.
A ventilation groove is provided in a portion of the insulating member that covers the inner peripheral surface between the teeth adjacent in the circumferential direction.
特許第５８６１１０９号公報Japanese Patent No. 5861109
　上記のブラシレスモータでは、互いに別体であるステータ鉄心と絶縁性部材とが組み合わせられている。よって、製造時にステータ鉄心と絶縁性部材とが組み立てられる工程が必要となり、ブラシレスモータの組立性に向上の余地があり、ブラシレスモータが使用される電動作業機の組立性に影響を与える。又、ステータ鉄心に装着するために絶縁性部材の形状に制約があり、必要な絶縁距離を確保するために絶縁性部材が比較的に大きくなってしまい、その分ブラシレスモータひいては電動作業機が大きくなるか、あるいはその分ステータ鉄心及びコイルの占有領域が小さくなってブラシレスモータひいては電動作業機の出力が小さくなってしまう。
　そこで、本出願人による先の出願（特願２０１７－１３０５８７）では、ステータコア（ステータ鉄心）にインシュレータ（絶縁性部材）が一体成形されるモータを有する電動工具が提案された。このような電動工具のモータでは、絶縁距離を確保しても出力が大きくなり、又組立性に優れたものとなる。 In the brushless motor, the stator core and the insulating member, which are separate from each other, are combined. Therefore, a process for assembling the stator iron core and the insulating member is required at the time of manufacture, and there is room for improvement in the assemblability of the brushless motor, which affects the assemblability of the electric working machine in which the brushless motor is used. In addition, there are restrictions on the shape of the insulating member for mounting on the stator core, and the insulating member becomes relatively large in order to secure the necessary insulation distance, and accordingly the brushless motor and thus the electric work machine are large. As a result, the area occupied by the stator iron core and the coil is reduced accordingly, and the output of the brushless motor and thus the electric working machine is reduced.
Therefore, in an earlier application (Japanese Patent Application No. 2017-130387) by the present applicant, an electric tool having a motor in which an insulator (insulating member) is integrally formed with a stator core (stator core) has been proposed. In such a motor of an electric tool, even if the insulation distance is ensured, the output becomes large and the assemblability is excellent.
　かようにステータコアにインシュレータが一体成形される場合、インシュレータが比較的に薄く成形されるため、薄い部分にインシュレータの樹脂が回り込まずステータコアが露出してしまうといった成形不良の可能性が存在する。
　本発明の主な目的は、成形不良が防止された状態でステータコアにインシュレータが一体成形されるモータを備えた電動作業機を提供することである。 When the insulator is integrally formed on the stator core as described above, the insulator is formed relatively thin. Therefore, there is a possibility that the stator core is exposed because the resin of the insulator does not wrap around the thin portion.
A main object of the present invention is to provide an electric working machine including a motor in which an insulator is integrally formed with a stator core in a state where molding defects are prevented.
　請求項１に係る発明は、ステータコアと、前記ステータコアに一体成形されるインシュレータと、前記インシュレータに保持される複数のコイルと、前記ステータコアに対して回転可能なロータと、を有するモータを備えており、前記ステータコアにおける前記インシュレータと接触する面には、他の部分に対して凹む凹部が設けられていることを特徴とするものである。
　請求項２に係る発明は、上記発明において、前記ステータコアは、前記コイルの内側に配置される複数のティースを有しており、前記インシュレータは、前記ティースを被覆するティース被覆部を有しており、前記凹部は、前記ティースに設けられることを特徴とするものである。
　請求項３に係る発明は、上記発明において、前記ティースは、前記ステータコアの円筒状部の内周面から径方向内方に突出しており、前記凹部は、前記ティースにおける複数の面にそれぞれ設けられており、各前記凹部は、径方向において互いにずれていることを特徴とするものである。
　請求項４に係る発明は、上記発明において、前記凹部は、前記ティースの間の部分に設けられることを特徴とするものである。
　請求項５に係る発明は、上記発明において、前記ティース被覆部における前記ティースの根元を被覆する部分に、円筒状部を有する前記ステータコアの軸方向に延びる溝が形成されていることを特徴とするものである。
　請求項６に係る発明は、ステータコアと、前記ステータコアに一体成形されるインシュレータと、前記インシュレータに保持される複数のコイルと、前記ステータコアに対して回転可能なロータと、を有するモータを備えており、前記インシュレータには、他の部分に対して突出する凸部が設けられていることを特徴とするものである。
　請求項７に係る発明は、上記発明において、前記ステータコアにおける前記インシュレータと接触する面には、他の部分に対して凹む凹部が設けられていることを特徴とするものである。
　請求項８に係る発明は、上記発明において、複数の前記コイルの間に、コイル連絡導線が形成されており、前記コイル連絡導線は、前記凸部の起立面に接していることを特徴とするものである。
　請求項９に係る発明は、上記発明において、前記ステータコアは、前記コイルの内側に配置され周方向に並ぶ複数のティースを有しており、前記インシュレータは、複数の前記ティースの間を被覆する円筒部を有しており、前記凸部は、前記円筒部に設けられることを特徴とするものである。
　請求項１０に係る発明は、上記発明において、前記ステータコアは、前記コイルの内側に配置される複数のティースを有しており、前記インシュレータは、前記ティースを被覆するティース被覆部を有しており、前記凸部は、前記ティース被覆部に設けられることを特徴とするものである。
　請求項１１に係る発明は、上記発明において、前記ティース被覆部における前記ティースの根元を被覆する部分に、円筒状部を有する前記ステータコアの軸方向に延びる溝が形成されていることを特徴とするものである。 The invention according to claim 1 includes a motor having a stator core, an insulator formed integrally with the stator core, a plurality of coils held by the insulator, and a rotor rotatable with respect to the stator core. The surface of the stator core that contacts the insulator is provided with a recess that is recessed with respect to other portions.
According to a second aspect of the present invention, in the above invention, the stator core has a plurality of teeth arranged inside the coil, and the insulator has a teeth covering portion that covers the teeth. The recess is provided in the tooth.
According to a third aspect of the present invention, in the above invention, the teeth protrude radially inward from the inner peripheral surface of the cylindrical portion of the stator core, and the concave portions are provided on a plurality of surfaces of the teeth, respectively. The recesses are shifted from each other in the radial direction.
The invention according to claim 4 is characterized in that, in the above-mentioned invention, the recess is provided in a portion between the teeth.
The invention according to claim 5 is characterized in that, in the above-described invention, a groove extending in the axial direction of the stator core having a cylindrical portion is formed in a portion of the teeth covering portion that covers the root of the tooth. Is.
The invention according to claim 6 includes a motor having a stator core, an insulator integrally formed with the stator core, a plurality of coils held by the insulator, and a rotor rotatable with respect to the stator core. The insulator is provided with a protruding portion that protrudes with respect to the other portion.
The invention according to claim 7 is characterized in that, in the above-mentioned invention, the surface of the stator core that comes into contact with the insulator is provided with a recess that is recessed with respect to another portion.
The invention according to claim 8 is characterized in that, in the above invention, a coil connection conducting wire is formed between the plurality of coils, and the coil connection conducting wire is in contact with an upright surface of the convex portion. Is.
The invention according to claim 9 is the above invention, wherein the stator core has a plurality of teeth arranged inside the coil and arranged in the circumferential direction, and the insulator is a cylinder covering between the plurality of teeth. The convex part is provided in the cylindrical part.
According to a tenth aspect of the present invention, in the above invention, the stator core has a plurality of teeth disposed inside the coil, and the insulator has a teeth covering portion that covers the teeth. The convex portion is provided on the teeth covering portion.
According to an eleventh aspect of the present invention, in the above invention, a groove extending in the axial direction of the stator core having a cylindrical portion is formed in a portion of the tooth covering portion that covers the root of the tooth. Is.
　本発明の主な効果は、成形不良が防止された状態でステータコアにインシュレータが一体成形されるモータを備えた電動作業機が提供されることである。 The main effect of the present invention is to provide an electric working machine including a motor in which an insulator is integrally formed with a stator core in a state where molding defects are prevented.
本発明の第１形態に係る芝刈機の中央縦断面図である。It is a center longitudinal cross-sectional view of the lawn mower which concerns on the 1st form of this invention. 図１の一部拡大図である。FIG. 2 is a partially enlarged view of FIG. 1. 図１の芝刈機におけるモータの斜視図である。It is a perspective view of the motor in the lawn mower of FIG. 図３のモータの中央縦断面図である。It is a center longitudinal cross-sectional view of the motor of FIG. 図３のモータにおけるステータコアアッセンブリの斜視図である。FIG. 4 is a perspective view of a stator core assembly in the motor of FIG. 3. 図５のステータコアアッセンブリ及び図４のコイルの横断面図である。FIG. 6 is a cross-sectional view of the stator core assembly of FIG. 5 and the coil of FIG. 4. 図５のステータコアアッセンブリの横断面図である。FIG. 6 is a cross-sectional view of the stator core assembly of FIG. 5. 図５のステータコアアッセンブリにおけるステータコアの上面図である。FIG. 6 is a top view of a stator core in the stator core assembly of FIG. 5. 本発明の第２形態に係る芝刈機の図７相当図である。FIG. 8 is a view corresponding to FIG. 7 of a lawn mower according to a second embodiment of the present invention. 本発明の第２形態に係る芝刈機の図８相当図である。It is a FIG. 8 equivalent view of the lawn mower which concerns on the 2nd form of this invention. 本発明の第３形態に係る芝刈機の図５相当図である。FIG. 6 is a view corresponding to FIG. 5 of a lawn mower according to a third embodiment of the present invention. 本発明の第３形態に係る芝刈機の図７相当図である。FIG. 8 is a view corresponding to FIG. 7 of a lawn mower according to a third embodiment of the present invention. 本発明の第３形態に係る芝刈機の図８相当図である。FIG. 9 is a view corresponding to FIG. 8 of a lawn mower according to a third embodiment of the present invention.
　以下、本発明の実施の形態及びその変更例が、適宜図面に基づいて説明される。
　当該形態及び変更例における前後上下左右は、説明の便宜上定めたものであり、作業の状況及び移動する部材の状態等により変化することがある。
　尚、本発明は、下記の形態及び変更例に限定されない。 Hereinafter, embodiments of the present invention and modifications thereof will be described with reference to the drawings as appropriate.
The front, rear, top, bottom, left and right in the embodiment and the modification are determined for convenience of explanation, and may change depending on the status of work, the state of the moving member, and the like.
In addition, this invention is not limited to the following form and modification.
［第１形態］
　図１は、本発明の第１形態に係る電動作業機（園芸工具）の一例である充電式の芝刈機１の中央縦断面図である。図２は、図１の一部拡大図である。
　芝刈機１は、本体部２と、その後部から後方斜め上方に延びる枠形のハンドル部４と、を備えている。尚、方向はハンドル部４を握る使用者を基準とし、図１の左が芝刈機１の前であり、図１の上が芝刈機１の上である。 [First form]
FIG. 1 is a central longitudinal sectional view of a rechargeable lawn mower 1 which is an example of an electric working machine (gardening tool) according to a first embodiment of the present invention. FIG. 2 is a partially enlarged view of FIG.
The lawn mower 1 includes a main body part 2 and a frame-shaped handle part 4 extending obliquely rearward and upward from the rear part. The direction is based on the user gripping the handle portion 4, the left of FIG. 1 is the front of the lawn mower 1, and the top of FIG. 1 is the top of the lawn mower 1.
　本体部２は、各種の部材を直接的に又は間接的に保持する下方に開口した箱状の本体ハウジング１０と、その四隅にそれぞれ回転可能に配置された車輪１２と、バッテリパック１４を１個又は２個装着可能であり本体ハウジング１０の上部に形成されたバッテリ装着部１６と、本体ハウジング１０の前部内において上下左右に広がる状態で保持された平たい箱状のコントローラ１８と、本体ハウジング１０内の中央部に保持されたモータ２０と、下方に向けられたモータ２０のモータ軸２２にボルト２４を介して連結された上下に延びる出力軸としてのスピンドル２６と、水平なリング状のインナフランジ２７及び上下に延びるボルト２８を介してスピンドル２６の下部に対し連結された水平な板状の刈刃３０（先端工具）と、を有する。
　モータ軸２２、ボルト２４、スピンドル２６、インナフランジ２７、ボルト２８、及び刈刃３０は、互いに同軸である。尚、モータ軸２２と刈刃３０との間に減速機構若しくは増速機構又は動力方向変換機構が配置されても良く、モータ軸２２ないし刈刃３０の少なくとも何れかは、他の部材に対して同軸でなくても良い。又、スピンドル２６は、省略されても良い。スピンドル２６及び刈刃３０の少なくとも一方は、ボルト止め以外の連結がなされても良い。 The main body 2 includes a box-shaped main body housing 10 that opens downward and directly holds various members, wheels 12 that are rotatably arranged at the four corners, and one battery pack 14. Alternatively, two battery mounting portions 16 that can be mounted and formed in the upper portion of the main body housing 10, a flat box-shaped controller 18 that is held in a state of spreading vertically and horizontally in the front portion of the main body housing 10, , A spindle 26 as a vertically extending output shaft connected to a motor shaft 22 of the motor 20 directed downward through a bolt 24, and a horizontal ring-shaped inner flange 27. And a horizontal plate-shaped cutting blade 30 (tip tool) connected to the lower portion of the spindle 26 via a vertically extending bolt 28.
The motor shaft 22, the bolt 24, the spindle 26, the inner flange 27, the bolt 28, and the cutting blade 30 are coaxial with each other. Note that a speed reduction mechanism, a speed increasing mechanism, or a power direction conversion mechanism may be disposed between the motor shaft 22 and the cutting blade 30, and at least one of the motor shaft 22 or the cutting blade 30 is in relation to other members. It does not have to be coaxial. Further, the spindle 26 may be omitted. At least one of the spindle 26 and the cutting blade 30 may be connected other than by bolting.
　ハンドル部４には、側面視“Ｌ”字状で後面視逆“Ｕ”字状のスイッチレバー３２が、左右のレバー連結部３４を介して、使用者により引き操作可能（左右方向の軸周りに回転可能）に設けられている。
　又、右のレバー連結部３４の内面側には、その内面から内方に突出しており、使用者により押し操作可能であるロックオフボタン３６が設けられている。
　使用者がロックオフボタン３６を押すと、スイッチレバー３２の引き操作が可能となる。使用者がスイッチレバー３２の引き操作を止めると、スイッチレバー３２は、ロックオフボタン３６の押し操作がない限り引き操作不能な状態で、前方に復帰する。ロックオフボタン３６は、引かれないスイッチレバー３２に係止し、押し操作による移動によってその係止を解除する。 A switch lever 32 having a “L” shape in a side view and a reverse “U” shape in a rear view can be pulled on the handle portion 4 by a user via a left and right lever connecting portion 34 (around a left and right axis). Can be rotated).
A lock-off button 36 that protrudes inward from the inner surface of the right lever connecting portion 34 and that can be pushed by the user is provided on the inner surface side of the right lever connecting portion 34.
When the user presses the lock-off button 36, the switch lever 32 can be pulled. When the user stops the pulling operation of the switch lever 32, the switch lever 32 returns to the front without being pulled unless the lock-off button 36 is pushed. The lock-off button 36 is locked to the switch lever 32 that is not pulled, and the lock is released by movement by a push operation.
　本体部２のバッテリ装着部１６は、前下がりの装着面を有しており、その装着面の左部及び右部の少なくとも一方に対し、バッテリパック１４が、後側から前方へスライドさせることで装着される。尚、装着面は、前上がりあるいは水平であっても良い。又、バッテリ装着部１６には、１個あるいは３個以上のバッテリパック１４が装着されても良い。更に、バッテリパック１４のスライド方向は、後方あるいは左右方向等であっても良い。バッテリパック１４の装着は、バッテリケースへの挿入といったように、スライド以外でなされても良い。 The battery mounting part 16 of the main body 2 has a front-lowering mounting surface, and the battery pack 14 is slid forward from the rear side with respect to at least one of the left part and the right part of the mounting surface. Installed. The mounting surface may be front-up or horizontal. Further, one or three or more battery packs 14 may be attached to the battery attachment portion 16. Furthermore, the sliding direction of the battery pack 14 may be rearward or left-right direction. The battery pack 14 may be attached by means other than sliding, such as insertion into a battery case.
　コントローラ１８は、後方に開放した平たい箱状のコントローラケース４０と、その内部に保持された上下左右に広がる制御回路基板４２と、を有する。
　コントローラ１８（制御回路基板４２）は、バッテリ装着部１６に配置された装着部側端子（図示略）と、図示されないリード線（電源線）によって接続されている。装着部側端子は、装着されたバッテリパック１４のバッテリ側端子（図示略）と接続する。
　又、コントローラ１８（制御回路基板４２）は、モータ２０等を制御するためのマイコン（図示略）及びスイッチング素子（図示略）を搭載している。
　更に、コントローラ１８（制御回路基板４２）は、スイッチレバー３２につながっておりスイッチレバー３２により切り替えられるメインスイッチ（図示略）と、図示されないリード線（スイッチ信号線）によって接続されている。
　尚、コントローラ１８（制御回路基板４２）は、モータ２０のみを制御するものであっても良い。又、コントローラ１８（制御回路基板４２）は、ロックオフボタン３６につながるロックスイッチと電気的に接続され、ロックスイッチがロックオフボタン３６の押下に対応した切替状態となっていないと、メインスイッチがオンであってもモータ２０を回転させないものであっても良い。 The controller 18 includes a flat box-like controller case 40 opened rearward, and a control circuit board 42 that is held inside and extends in the vertical and horizontal directions.
The controller 18 (control circuit board 42) is connected to a mounting portion side terminal (not shown) arranged in the battery mounting portion 16 by a lead wire (power supply line) (not shown). The mounting portion side terminal is connected to a battery side terminal (not shown) of the mounted battery pack 14.
The controller 18 (control circuit board 42) is equipped with a microcomputer (not shown) and a switching element (not shown) for controlling the motor 20 and the like.
Further, the controller 18 (control circuit board 42) is connected to a main switch (not shown) connected to the switch lever 32 and switched by the switch lever 32 by a lead wire (switch signal line) not shown.
The controller 18 (control circuit board 42) may control only the motor 20. The controller 18 (control circuit board 42) is electrically connected to a lock switch connected to the lock-off button 36. If the lock switch is not in a switching state corresponding to pressing of the lock-off button 36, the main switch Even if it is ON, the motor 20 may not be rotated.
　図３及び図４にも示されるモータ２０は、ブラシレスモータであり、バッテリパック１４で駆動するＤＣ（充電式）のモータである。モータ２０は、軸方向が上下方向である筒状のステータ５０と、ステータ５０の内部に配置されステータ５０に対して回転可能である円柱状のロータ５２と、を備えており、インナロータ型となっている。尚、モータ２０は、ブラシ付きのモータであっても良いし、柱状のステータの外側に筒状のロータが配置されるアウタロータ型であっても良い。又、モータ２０は、ＤＣモータに代えて、ＡＣ（交流式）のモータとされても良い。
　ステータ５０の上下は、それぞれ円筒状のモータカバー５４に覆われている。各モータカバー５４は、上下方向に延びる複数（３本）のボルト５５により、間隔を置いて連結されている。上のモータカバー５４に設けられた孔からは、複数（３本）の電源線５６及び複数（６本）の信号線５７が出ている。モータ２０は、電源線５６及び信号線５７を通じて、コントローラ１８（制御回路基板４２）と電気的に接続されている。
　ロータ５２は、その軸心に配置された上下方向のモータ軸２２を備えている。モータ軸２２の下端部は、上のモータカバー５４の下側に露出しており、内部にボルト２４の穴を有している。
　上のモータカバー５４内には、モータ軸２２を軸周りで回転可能に支持する上の軸受５８が保持されている。下のモータカバー５４内には、モータ軸２２を軸周りで回転可能に支持する下の軸受５９が保持されている。
　モータ２０は、下方に開放した碗状であり本体ハウジング１０内に保持されたモータハウジング６０と、その下端部に配置され複数のネジ６２で本体ハウジング１０に保持されたモータハウジング蓋６４とで保持されている。下のモータカバー５４における前の左右と後ろの左右とには、それぞれネジ６２が通るネジ孔部６５が、径方向外方に突出する状態で設けられている。 The motor 20 also shown in FIGS. 3 and 4 is a brushless motor and is a DC (rechargeable) motor driven by the battery pack 14. The motor 20 includes a cylindrical stator 50 whose axial direction is the vertical direction, and a cylindrical rotor 52 that is disposed inside the stator 50 and is rotatable with respect to the stator 50, and is an inner rotor type. ing. The motor 20 may be a motor with a brush, or may be an outer rotor type in which a cylindrical rotor is disposed outside a columnar stator. The motor 20 may be an AC (AC type) motor instead of the DC motor.
The upper and lower sides of the stator 50 are covered with cylindrical motor covers 54, respectively. Each motor cover 54 is connected at intervals by a plurality (three) of bolts 55 extending in the vertical direction. A plurality (three) of power supply lines 56 and a plurality (six) of signal lines 57 protrude from the holes provided in the upper motor cover 54. The motor 20 is electrically connected to the controller 18 (control circuit board 42) through the power supply line 56 and the signal line 57.
The rotor 52 is provided with a motor shaft 22 in the vertical direction arranged at the axis. The lower end portion of the motor shaft 22 is exposed to the lower side of the upper motor cover 54 and has a hole for the bolt 24 inside.
The upper motor cover 54 holds an upper bearing 58 that supports the motor shaft 22 rotatably about the shaft. A lower bearing 59 that supports the motor shaft 22 so as to be rotatable around the shaft is held in the lower motor cover 54.
The motor 20 is held by a motor housing 60 having a bowl-like shape opened downward and held in the main body housing 10, and a motor housing lid 64 arranged at the lower end of the motor 20 and held by the main body housing 10 with a plurality of screws 62. Has been. Screw holes 65 through which screws 62 pass are respectively provided in the front left and right and rear left and right of the lower motor cover 54 so as to protrude radially outward.
　モータハウジング蓋６４の下部には、上方に開いた碗状のスピンドルハウジング６６が、複数のネジ６８により保持されている。
　スピンドルハウジング６６は、下部内中央において、スピンドル２６を回転可能に支持するスピンドル軸受７０を保持している。
　スピンドル２６の下端部は、スピンドルハウジング６６の下側に露出しており、内部にボルト２８の穴を有している。 A bowl-shaped spindle housing 66 opened upward is held by a plurality of screws 68 at the lower part of the motor housing lid 64.
The spindle housing 66 holds a spindle bearing 70 that rotatably supports the spindle 26 at the center in the lower part.
The lower end portion of the spindle 26 is exposed below the spindle housing 66 and has a hole for a bolt 28 inside.
　刈刃３０は、インナフランジ２７とボルト２８とで挟まれている。
　インナフランジ２７の上面には、円筒状の突起７２が形成されている。突起７２は、スピンドル２６の先端部を受け入れている。 The cutting blade 30 is sandwiched between the inner flange 27 and the bolt 28.
A cylindrical protrusion 72 is formed on the upper surface of the inner flange 27. The protrusion 72 receives the tip of the spindle 26.
　そして、モータ２０のロータ５２は、モータ軸２２の中央部においてモータ軸２２と同心の状態で一体に取り付けられた円筒状のロータコア９０と、ロータコア９０の周縁部において同心円上に並べられた複数（８個）の上下方向の貫通孔内にそれぞれ配置された板状の永久磁石９２と、を有している。
　ロータコア９０は、複数の鋼板が積層された積層体であり、各永久磁石９２とモータ軸２２との間において、上下方向を軸方向とした四半円筒面状に広がる空間部としての肉盗み９４を、複数（４個）有している。
　各永久磁石９２は、全体として正八角筒状に配置されており、周方向において互いに若干離れている。周方向で隣同士の永久磁石９２の間であって、各貫通孔の両端には、永久磁石９２の端部を越えて周方向外側に突出する空間であるフラックスバリア（図示略）が形成されている。フラックスバリアは、永久磁石９２が通る貫通孔本体空間と連続しており、貫通孔の一部である。 The rotor 52 of the motor 20 includes a cylindrical rotor core 90 that is integrally attached to the central portion of the motor shaft 22 in a concentric state with the motor shaft 22, and a plurality of ( 8) plate-like permanent magnets 92 respectively disposed in the vertical through-holes.
The rotor core 90 is a laminated body in which a plurality of steel plates are laminated, and between the permanent magnets 92 and the motor shaft 22, a meat stealer 94 as a space portion that spreads in a quarter-cylindrical plane with the vertical direction as the axial direction is provided. , Have multiple (4).
The permanent magnets 92 are arranged in a regular octagonal cylinder as a whole, and are slightly separated from each other in the circumferential direction. Between the adjacent permanent magnets 92 in the circumferential direction, a flux barrier (not shown) that is a space protruding outward in the circumferential direction beyond the end of the permanent magnet 92 is formed at both ends of each through hole. ing. The flux barrier is continuous with the through hole main body space through which the permanent magnet 92 passes, and is a part of the through hole.
　他方、モータ２０のステータ５０は、ステータコアアッセンブリ１１０と、複数（１２個）のコイル１１２と、端子ユニット１１４と、センサ基板１１６と、を有している。 On the other hand, the stator 50 of the motor 20 has a stator core assembly 110, a plurality (12) of coils 112, a terminal unit 114, and a sensor substrate 116.
　ステータコアアッセンブリ１１０は、図５ないしは図８にも示されるように、ステータコア１２０（図８）と、その上下及び内側に配置され、ステータコア１２０に保持されるインシュレータ１２２と、を備えている。 The stator core assembly 110 includes a stator core 120 (FIG. 8) and an insulator 122 that is disposed on the top and bottom and inside of the stator core 120 and is held by the stator core 120, as shown in FIGS. 5 and 8.
　ステータコア１２０は、複数のリング状の鋼板が積層された積層体であり、円筒状部１２４の内周部に、それぞれ径方向内方に突出していて周方向で等間隔に並ぶ複数（１２個）のティース１２６を有している。
　各ティース１２６における径方向内側の先端部は、他の部分に対して上下及び周方向両側に広がっており、先端面は、内方に膨らむ形状を呈している。
　各ティース１２６における上下及び径方向に広がる周方向両側の面（互いに対向する面）には、複数（各面４本）の上下に延びる溝状の凹部１２７が形成されている。各凹部１２７は、周方向内側に凹んでおり、面の上辺（ティース１２６上面）から下辺（ティース１２６下面）まで延びていて、周方向両側の面を上下方向で貫いている。一つの面における各凹部１２７は、互いに等間隔に配置されている。各ティース１２６の一方の面における各凹部１２７と、他方の面における各凹部１２７とは、径方向において互いにずれている。即ち、一方の面における凹部１２７から他方の面に周方向に延びた仮想的な直線は、他方の面における凹部１２７の間に至る。一方の面における最も径方向内方の凹部１２７は、ティース１２６先端部の広がった部分の根元に形成されている。
　周方向で隣接するティース１２６の間は、コイル１１２が配置される空間（スロット）となっている。
　ステータコア１２０の円筒状部１２４の外周面には、上下方向の２本の外溝１２８及び１本の外リブ１２９が形成されている。各外溝１２８及び外リブ１２９は、周方向に等間隔に配置されている。尚、各外溝１２８及び外リブ１２９の少なくとも何れかは、配置が変更されても良いし、本数が増減されても良いし、省略されても良い。 The stator core 120 is a laminated body in which a plurality of ring-shaped steel plates are laminated. A plurality (12 pieces) of each of the stator cores 120 protrude radially inwardly and are arranged at equal intervals in the circumferential direction. The teeth 126 are provided.
The distal end portion on the radially inner side of each tooth 126 extends in the vertical and circumferential directions with respect to the other portions, and the distal end surface has a shape that swells inward.
A plurality of (four on each surface) groove-like recesses 127 extending in the vertical direction are formed on the surfaces on both sides in the circumferential direction (surfaces facing each other) extending in the vertical and radial directions in each tooth 126. Each recess 127 is recessed inward in the circumferential direction, extends from the upper side of the surface (upper surface of the teeth 126) to the lower side (lower surface of the teeth 126), and penetrates the surfaces on both sides in the circumferential direction in the vertical direction. The concave portions 127 on one surface are arranged at equal intervals. Each concave portion 127 on one surface of each tooth 126 and each concave portion 127 on the other surface are displaced from each other in the radial direction. That is, an imaginary straight line extending in the circumferential direction from the recess 127 on one surface to the other surface reaches between the recesses 127 on the other surface. The most radially inward concave portion 127 on one surface is formed at the base of the widened portion of the tip end portion of the tooth 126.
A space (slot) in which the coil 112 is disposed is formed between the teeth 126 adjacent in the circumferential direction.
Two outer grooves 128 and one outer rib 129 in the vertical direction are formed on the outer peripheral surface of the cylindrical portion 124 of the stator core 120. Each outer groove 128 and outer rib 129 are arranged at equal intervals in the circumferential direction. Note that the arrangement of at least one of the outer grooves 128 and the outer ribs 129 may be changed, the number of the outer grooves 128 and the outer ribs 129 may be increased or decreased, and may be omitted.
　インシュレータ１２２は、樹脂製で筒状の電気絶縁部であり、各ティース１２６の外側に配置されるティース被覆部１３２と、ティース被覆部１３２をつなぐと共に上下にリング状に張り出す円筒部１３３と、を備えている。
　各ティース被覆部１３２は、対応するティース１２６の先端部以外を被覆するものであり、ティース１２６の先端部の隣接部において、他の部分より上下及び周方向両側に広がっている壁部１３４を有している。又、各ティース被覆部１３２における、ティース１２６の根元を被覆する部分には、コイル１１２の巻き線２本の太さに相当する幅の溝１３５が、上下方向に延びるように形成されている。
　又、各ティース被覆部１３２は、ティース１２６の各凹部１２７に入り込んだ筋部１３６を有している。
　円筒部１３３の内周面であって、隣接するティース１２６の間（スロット内）の中央部には、上下に延びる凸部１３７が形成されている。各凸部１３７は、径方向内側に突出しており、内周面の上辺（円筒状部１２４上面）から下辺（円筒状部１２４下面）まで延びていて、内周面を上下方向において貫いている。 The insulator 122 is a resin-made cylindrical electrical insulating portion, and includes a teeth covering portion 132 disposed on the outside of each tooth 126, a cylindrical portion 133 that connects the teeth covering portion 132 and protrudes up and down in a ring shape, It has.
Each tooth covering portion 132 covers a portion other than the tip end portion of the corresponding tooth 126, and has a wall portion 134 that extends in the vertical and circumferential direction sides from the other portion at the adjacent portion of the tip end portion of the tooth 126. is doing. Further, a groove 135 having a width corresponding to the thickness of the two windings of the coil 112 is formed in the portion covering each tooth covering portion 132 so as to extend in the vertical direction.
In addition, each tooth covering portion 132 has a line portion 136 that enters each concave portion 127 of the tooth 126.
A convex portion 137 extending in the vertical direction is formed on the inner peripheral surface of the cylindrical portion 133 and at the central portion between adjacent teeth 126 (in the slot). Each convex portion 137 projects radially inward, extends from the upper side (the upper surface of the cylindrical portion 124) of the inner peripheral surface to the lower side (the lower surface of the cylindrical portion 124), and penetrates the inner peripheral surface in the vertical direction. .
　又、円筒部１３３の上部には、上下方向のネジ穴を有する複数（５個）のネジボス部１３８が形成されている。各ネジボス部１３８は、仮想的な正六角形の５つの頂点に位置するように周方向に等間隔に並んでおり、それらの間には、合計１２個のヒュージング端子入れ１４０のうちの何れか２個（１箇所のみ４個）が配置される。
　各ヒュージング端子入れ１４０は、互いに周方向に等間隔に並んでいる。各ヒュージング端子入れ１４０の径方向内方に、１個のスロットが位置している。
　各ヒュージング端子入れ１４０は、周方向に並ぶ一対の断面“Ｕ”字状の第１突体１４２及び第２突体１４４を有している。
　第２突体１４４は、上面視で、第１突体１４２より時計回り正方向側に配置されている。
　第１突体１４２は、円筒部１３３の他の部分に対して、径方向の内外一対で上方に突出している。第１突体１４２に係る外側の突出部は、円筒部１３３の外周よりも内側に配置され、ステータコア１２０の外周面よりも内側に配置される。第２突体１４４は、円筒部１３３の他の部分に対して、上部が第１突体１４２に係る内側の突出部と周方向に隣接する状態で、上方に突出している。
　各凸部１３７は、対応するヒュージング端子入れ１４０における第１突体１４２と第２突体１４４との間から下方に形成されている。 In addition, a plurality of (five) screw boss portions 138 having upper and lower screw holes are formed on the upper portion of the cylindrical portion 133. The screw boss portions 138 are arranged at equal intervals in the circumferential direction so as to be positioned at five vertices of a virtual regular hexagon, and any one of a total of 12 fusing terminal slots 140 is interposed between them. Two pieces (four pieces at one place) are arranged.
The fusing terminal slots 140 are arranged at equal intervals in the circumferential direction. One slot is located radially inward of each fusing terminal case 140.
Each fusing terminal case 140 has a pair of first and second protrusions 142 and 144 having a U-shaped cross section arranged in the circumferential direction.
The second protrusion 144 is disposed on the positive side in the clockwise direction from the first protrusion 142 in a top view.
The first protrusion 142 protrudes upward in a pair of radial inner and outer sides with respect to the other portions of the cylindrical portion 133. The outer protruding portion related to the first protrusion 142 is disposed on the inner side of the outer periphery of the cylindrical portion 133, and is disposed on the inner side of the outer peripheral surface of the stator core 120. The second protrusion 144 protrudes upward in a state where the upper part is adjacent to the inner protrusion of the first protrusion 142 in the circumferential direction with respect to the other part of the cylindrical part 133.
Each protrusion 137 is formed downward from between the first protrusion 142 and the second protrusion 144 in the corresponding fusing terminal case 140.
　ステータコアアッセンブリ１１０は、ステータコア１２０及びインシュレータ１２２が一体成形されることで形成される。
　一体成形の手法は、特に限定されず、例えば、ステータコア１２０を金型に挿入した状態で樹脂を射出することで一体成形するインサート射出成形である。
　インシュレータ１２２は、ステータコア１２０下側から、ティース１２６先端面を除く内側（各ティース被覆部１３２及び円筒部１３３）を経て、ステータコア１２０上側（ネジボス部１３８及びヒュージング端子入れ１４０を有する円筒部１３３の張り出した上部）まで、継ぎ目なく一連に配置される。
　インシュレータ１２２（特に各ティース被覆部１３２及び円筒部１３３内面）は、所定以上の絶縁の確保を前提としたうえで、コンパクト化あるいは出力向上の観点から、なるべく薄くされる。
　インシュレータ１２２の一体成形時、樹脂は比較的に薄い各ティース被覆部１３２に流れ込み難いところ、ステータコア１２０のティース１２６には凹部１２７が設けられ、インシュレータ１２２が筋部１３６を有しているため、その分樹脂の通り道が広がって、各ティース被覆部１３２へ樹脂がより流れ込み易くなり、インシュレータ１２２の成形性がより良好になる。凹部１２７は、インシュレータ１２２のティース被覆部１３２と接触する、ステータコア１２０のティース１２６の周方向両側の面に設けられる。
　又、インシュレータ１２２の一体成形時、樹脂は比較的に薄い円筒部１３３内面（スロット周面）に流れ込み難いところ、円筒部１３３内面には凸部１３７が設けられるため、その分樹脂の通り道が広がって、円筒部１３３内面に樹脂がより流れ込み易くなり、インシュレータ１２２の成形性がより良好になる。 Stator core assembly 110 is formed by integrally molding stator core 120 and insulator 122.
The method of integral molding is not particularly limited, and is, for example, insert injection molding in which the resin is injected while the stator core 120 is inserted into a mold.
The insulator 122 passes from the lower side of the stator core 120 to the inner side (each tooth covering portion 132 and the cylindrical portion 133) excluding the tip end surface of the tooth 126, and then to the upper side of the stator core 120 (the screw portion 138 and the cylindrical portion 133 having the fusing terminal holder 140). Up to the overhanging upper part), they are arranged in series.
The insulator 122 (in particular, the inner surfaces of the teeth covering portion 132 and the cylindrical portion 133) is made as thin as possible from the viewpoint of compactness or improved output, on the premise of ensuring a predetermined insulation or more.
When the insulator 122 is integrally formed, the resin is difficult to flow into each of the relatively thin teeth covering portions 132. However, since the teeth 126 of the stator core 120 are provided with the recesses 127 and the insulator 122 has the stripe portions 136, The path of the minute resin spreads, the resin more easily flows into each of the tooth covering portions 132, and the moldability of the insulator 122 becomes better. The recesses 127 are provided on both circumferential surfaces of the teeth 126 of the stator core 120 that are in contact with the teeth covering portion 132 of the insulator 122.
Further, when the insulator 122 is integrally formed, the resin hardly flows into the inner surface (slot peripheral surface) of the relatively thin cylindrical portion 133. Since the convex portion 137 is provided on the inner surface of the cylindrical portion 133, the passage of the resin is expanded accordingly. Thus, the resin easily flows into the inner surface of the cylindrical portion 133, and the moldability of the insulator 122 becomes better.
　ステータコアアッセンブリ１１０のティース被覆部１３２には、巻き線が巻かれることで、円筒状の各コイル１１２が形成される。各コイル１１２の内側には、対応するティース１２６及びティース被覆部１３２が配置される。
　１２個のコイル１１２は、４個を１組として、全３組のコイル１１２によりデルタ結線される（三相）。各組においては、それぞれ直列接続された２個のコイル１１２と２個のコイル１１２とが、並列接続される（２直列２並列）。
　かような１２個のコイル１１２は、それぞれが一連である２本の導線により形成される。
　即ち、第１の導線は、第１の巻き始めから、ヒュージング端子入れ１４０の第１突体１４２及び第２突体１４４を渡り、２個のティース被覆部１３２にそれぞれ巻かれ、次のヒュージング端子入れ１４０を渡り、２個のティース被覆部１３２にそれぞれ巻かれ、更に次のヒュージング端子入れ１４０を渡り、最初のヒュージング端子入れ１４０を渡って第１の巻き終わりに達する。各コイル１１２間には、コイル連絡導線１４６が形成される。各コイル連絡導線１４６の一部は、凸部１３７の起立面（周方向の端面）に接している。
　又、第２の導線は、第２の巻き始めから第２の巻き終わりまで、第１の導線と同様に巻かれる。但し、第１の導線が通っていないヒュージング端子入れ１４０及びティース被覆部１３２を通る。
　各ヒュージング端子入れ１４０を第１突体１４２から第２突体１４４へと渡った導線の部分に続く導線の部分は、まず溝１３５に入ってスロットに導入される。ティース被覆部１３２における最初の一巻き目は、溝１３５に案内される。導線の二巻き目以降は、一巻き目あるいは以前の巻き目に倣う。かようにして所定巻き目まで巻かれた導線は、円筒部１３３とティース被覆部１３２の壁部１３４との間に配置され、コイル１１２となる。
　コイル１１２は、凸部１３７とは周方向においてずれて形成される。巻かれた導線の幅は、導線二本分（二巻き）程度となり、溝１３５の幅程度及び壁部１３４の幅程度となる。尚、凸部１３７は、円筒部１３３の内周面におけるティース１２６間の中央部以外に配置されても良い。又、凸部１３７は、ティース１２６間毎に複数設けられても良い。 Each coil 112 is formed in the teeth coating portion 132 of the stator core assembly 110 by winding a winding. Corresponding teeth 126 and teeth covering portions 132 are arranged inside each coil 112.
The twelve coils 112 are delta-connected by three sets of coils 112 (three phases), with four as one set. In each set, two coils 112 and two coils 112 connected in series are connected in parallel (two series and two parallel).
Such twelve coils 112 are each formed by two conducting wires that are a series.
That is, the first conducting wire is wound around the two teeth covering portions 132 from the start of the first winding, across the first projecting body 142 and the second projecting body 144 of the fusing terminal case 140, and the next fuse. It passes over the jinging terminal case 140 and is wound around the two teeth covering portions 132, and further passes over the next fusing terminal case 140, crosses the first fusing terminal case 140, and reaches the first winding end. A coil connecting conductor 146 is formed between the coils 112. A part of each coil connection conducting wire 146 is in contact with the standing surface (circumferential end surface) of the convex portion 137.
Further, the second conducting wire is wound in the same manner as the first conducting wire from the second winding start to the second winding end. However, it passes through the fusing terminal compartment 140 and the teeth covering portion 132 through which the first conductor does not pass.
The portion of the conductor that follows each portion of the fusing terminal case 140 extending from the first protrusion 142 to the second protrusion 144 enters the groove 135 and is introduced into the slot. The first roll of the tooth covering portion 132 is guided to the groove 135. After the second winding of the conductor, follow the first winding or the previous winding. Thus, the conducting wire wound up to a predetermined winding is disposed between the cylindrical portion 133 and the wall portion 134 of the teeth covering portion 132 to become the coil 112.
The coil 112 is formed so as to be shifted from the convex portion 137 in the circumferential direction. The width of the wound conducting wire is about two conducting wires (two windings), and is about the width of the groove 135 and the width of the wall portion 134. In addition, the convex part 137 may be arrange | positioned other than the center part between the teeth 126 in the internal peripheral surface of the cylindrical part 133. FIG. Further, a plurality of convex portions 137 may be provided for each of the teeth 126.
　端子ユニット１１４は、内孔を有するリング状で絶縁性の樹脂製である端子ユニット本体１５０と、それぞれ導電性の金属製である複数（３個）の板金部材１５２と、を備えている。 The terminal unit 114 includes a terminal unit main body 150 made of a ring-like insulating resin having an inner hole, and a plurality (three pieces) of sheet metal members 152 each made of a conductive metal.
　端子ユニット本体１５０の周縁には、上下方向のネジ孔を有する複数（５個）のネジ孔部（図示略）が形成されている。各ネジ孔部は、他の部分に対して径方向外方に突出しており、ネジボス部１３８と同様に配置されている。
　更に、ステータコア１２０の外溝１２８に対応して、径方向外方に突出し更に下方に突出するピン部（図示略）がそれぞれ形成されている。
　又更に、端子ユニット本体１５０には、上方に開いたネジ穴を有するネジボス部１５４が、複数（３個）設けられている。各ネジボス部１５４は、端子ユニット本体１５０の前部と後左部と後右部とに配置されている。各ネジボス部１５４は、端子ユニット本体１５０の他の部分に対して、径方向内方に突出している。
　加えて、端子ユニット本体１５０における前左部と前右部とには、上方への突起を有する突起部（図示略）が設けられている。各突起部は、端子ユニット本体１５０の他の部分に対して、径方向内方に突出している。 A plurality (five) of screw holes (not shown) having vertical screw holes are formed on the periphery of the terminal unit main body 150. Each screw hole protrudes radially outward with respect to the other part, and is arranged in the same manner as the screw boss 138.
Further, corresponding to the outer grooves 128 of the stator core 120, pin portions (not shown) that protrude radially outward and further downward are formed.
Furthermore, the terminal unit main body 150 is provided with a plurality (three) of screw boss portions 154 having screw holes opened upward. Each screw boss portion 154 is disposed at the front portion, the rear left portion, and the rear right portion of the terminal unit main body 150. Each screw boss part 154 protrudes radially inward with respect to the other part of the terminal unit main body 150.
In addition, the front left part and the front right part of the terminal unit main body 150 are provided with protrusions (not shown) having upward protrusions. Each protrusion protrudes radially inward with respect to the other part of the terminal unit main body 150.
　各板金部材１５２は、半円弧状であって、上面視“Ｃ”字状の部材である。
　各板金部材１５２には、下方へ突出するヒュージング端子１６０が、複数設けられている。各ヒュージング端子１６０は、折返し部の先に、その折返し部に対して初期状態（ヒュージング前の状態）で上方へ開いた先端部を有している。尚、図１ないしは図４において、ヒュージング端子１６０は初期状態で図示されている。
　又、各板金部材１５２の後端部には、後方へ突出しており接続孔を有している接続片（図示略）が形成されている。
　各板金部材１５２の各ヒュージング端子１６０は、互いに周方向にずれて配置されており、ヒュージング端子入れ１４０に対応するように配置されている。 Each sheet metal member 152 has a semicircular arc shape and is a “C” -shaped member in a top view.
Each sheet metal member 152 is provided with a plurality of fusing terminals 160 protruding downward. Each fusing terminal 160 has a tip portion that opens upward in an initial state (a state before fusing) with respect to the folded portion at the tip of the folded portion. 1 to 4, the fusing terminal 160 is shown in an initial state.
Further, a connection piece (not shown) that protrudes rearward and has a connection hole is formed at the rear end portion of each sheet metal member 152.
The fusing terminals 160 of the respective sheet metal members 152 are arranged so as to be shifted from each other in the circumferential direction, and are arranged so as to correspond to the fusing terminal holders 140.
　端子ユニット１１４は、端子ユニット本体１５０、並びに各板金部材１５２が、ステータコアアッセンブリ１１０と同様に一体成形されて形成される。
　各板金部材１５２は、互いに接触しない状態で、それらの厚みの方向である上下方向に並べられ、同心円弧状に配置される。
　各板金部材１５２の各ヒュージング端子１６０、及び各接続片は、端子ユニット本体１５０から出ている。各接続片は、隔壁（図示略）で仕切られている。 The terminal unit 114 is formed by integrally molding the terminal unit main body 150 and each sheet metal member 152 in the same manner as the stator core assembly 110.
The sheet metal members 152 are arranged in a concentric arc shape in the vertical direction that is the direction of their thickness without being in contact with each other.
Each fusing terminal 160 and each connection piece of each sheet metal member 152 protrude from the terminal unit main body 150. Each connection piece is partitioned by a partition wall (not shown).
　端子ユニット１１４は、各ネジ孔部を、対応するネジボス部１３８に合わせ、これらにネジ（図示略）を入れることで、インシュレータ１２２の上側に取り付けられる。
　このとき、端子ユニット１１４の各ピン部の下端部が、ステータコア１２０の対応する外溝１２８に入り、端子ユニット１１４が確実にステータコアアッセンブリ１１０に対して位置決めされる。
　又、初期状態の各ヒュージング端子１６０が、対応するヒュージング端子入れ１４０における第１突体１４２と第２突体１４４との間に入り、コイル１１２をつなぐ渡り線部を囲む。そして、各ヒュージング端子１６０が閉じられて渡り線部が挟まれた状態で、通電等による加熱が行われれば、渡り線部とこれに対応するヒュージング端子１６０とが、熱かしめにより溶接されて（ヒュージング）、各コイル１１２が互いに所望の状態で接続され、モータ２０におけるコイル１１２の回路が形成される。
　更に、ネジボス部１３８の上端（インシュレータ１２２の最上部）は、取り付けられた端子ユニット１１４の上面からはみ出さない。 The terminal unit 114 is attached to the upper side of the insulator 122 by aligning each screw hole portion with the corresponding screw boss portion 138 and inserting a screw (not shown) therein.
At this time, the lower end portion of each pin portion of the terminal unit 114 enters the corresponding outer groove 128 of the stator core 120, and the terminal unit 114 is reliably positioned with respect to the stator core assembly 110.
In addition, each of the fusing terminals 160 in the initial state enters between the first protrusion 142 and the second protrusion 144 in the corresponding fusing terminal case 140 and surrounds the crossover portion connecting the coils 112. Then, if heating by energization or the like is performed in a state where each fusing terminal 160 is closed and the crossover portion is sandwiched, the crossover portion and the corresponding fusing terminal 160 are welded by heat caulking. (Fusing), the coils 112 are connected to each other in a desired state, and a circuit of the coil 112 in the motor 20 is formed.
Furthermore, the upper end of the screw boss portion 138 (the uppermost portion of the insulator 122) does not protrude from the upper surface of the attached terminal unit 114.
　端子ユニット１１４の各接続片には、図示されないネジボス及びネジ並びに端子板を介して、電源線５６が接続される。
　かような接続により、コントローラ１８及びバッテリ装着部１６を含めたコイル１１２の回路が形成される。
　又、各ネジを外せば、端子ユニット１１４の各接続片から、各電源線５６を、再接続可能に外すことができる。 A power supply line 56 is connected to each connection piece of the terminal unit 114 via a screw boss and a screw (not shown) and a terminal plate.
By such connection, a circuit of the coil 112 including the controller 18 and the battery mounting portion 16 is formed.
Moreover, if each screw is removed, each power line 56 can be removed from each connection piece of the terminal unit 114 so as to be reconnectable.
　センサ基板１１６は、リング状の基板であり、端子ユニット本体１５０の内孔の径方向内側に収まる外径を有している。
　センサ基板１１６は、ロータ５２の永久磁石９２の位置を検出して回転検出信号を出力する複数（３個）の回転検出素子（図示略）を搭載している。
　センサ基板１１６は、複数のネジ孔を有している。各ネジ孔は、端子ユニット本体１５０のネジボス部１５４に対応するように配置される。
　又、センサ基板１１６は、前部の左右に、ピン孔（図示略）を有している。各ピン孔は、端子ユニット本体１５０の突起部の突起に対応するように配置されている。
　更に、センサ基板１１６の左後辺は、斜め方向に延びる直線として形成されており、その内側に、回転検出素子の回転検出信号を伝える複数の信号線５７が、コネクタ（図示略）を介して接続されている。コネクタにおける接続を解除すれば、信号線５７がセンサ基板１１６から再接続可能に離脱する。
　センサ基板１１６は、ネジ孔と端子ユニット１１４のネジボス部１５４とを重ねてネジ１６２を上から入れることで、端子ユニット１１４に取り付けられている。センサ基板１１６の各ピン孔には、端子ユニット１１４の対応する突起部の突起が入り、センサ基板１１６が端子ユニット１１４に対して位置決めされる。 The sensor substrate 116 is a ring-shaped substrate and has an outer diameter that fits inside the inner hole of the terminal unit body 150 in the radial direction.
The sensor board 116 is mounted with a plurality (three) of rotation detection elements (not shown) that detect the position of the permanent magnet 92 of the rotor 52 and output a rotation detection signal.
The sensor substrate 116 has a plurality of screw holes. Each screw hole is arranged so as to correspond to the screw boss portion 154 of the terminal unit main body 150.
The sensor substrate 116 has pin holes (not shown) on the left and right of the front part. Each pin hole is arranged so as to correspond to the protrusion of the protrusion of the terminal unit main body 150.
Further, the left rear side of the sensor substrate 116 is formed as a straight line extending in an oblique direction, and a plurality of signal lines 57 for transmitting a rotation detection signal of the rotation detection element are provided inside the sensor board 116 via a connector (not shown). It is connected. When the connection at the connector is released, the signal line 57 is detached from the sensor substrate 116 so as to be reconnectable.
The sensor substrate 116 is attached to the terminal unit 114 by overlapping the screw holes and the screw boss portions 154 of the terminal unit 114 and inserting screws 162 from above. Each pin hole of the sensor board 116 has a protrusion of a corresponding protrusion of the terminal unit 114, and the sensor board 116 is positioned with respect to the terminal unit 114.
　次いで、このような芝刈機１の動作例が説明される。
　充電されたバッテリパック１４が２個バッテリ装着部１６に装着された状態で、作業者によりロックオフボタン３６が押されたうえでスイッチレバー３２の引き操作がなされると、メインスイッチがオンとなり、コントローラ１８（制御回路基板４２）にオン信号が伝達される。尚、バッテリパック１４が１個装着された状態においてオン信号が伝達されても良い。
　オン信号を受信したコントローラ１８は、マイコンにより、センサ基板１１６の回転検出信号を信号線５７から得て、モータ２０のロータ５２の回転状態を取得し、取得した回転状態に応じて各スイッチング素子のオンオフを制御し、ステータ５０の各相のコイル１１２に対し電源線５６を通じて順番に励磁電流を流すことで、ロータ５２を回転させる。
　ロータ５２の回転により、モータ軸２２が回転し、モータ軸２２の回転は、スピンドル２６に伝わり、スピンドル２６に装着された刈刃３０に回転力が付与される。芝刈機１は、上下方向の軸周りで水平（地面と平行）に回転された刈刃３０により、芝を刈る動作を行う（ロータリー刃型）。
　使用者は、ハンドル部４を前方へ押すことで、車輪１２を介して芝刈機１を芝の生えた地面上で走行させ、芝を切り揃えて芝面を整える。 Next, an operation example of such a lawn mower 1 will be described.
When the operator presses the lock-off button 36 and pulls the switch lever 32 with two charged battery packs 14 mounted on the battery mounting portion 16, the main switch is turned on. An ON signal is transmitted to the controller 18 (control circuit board 42). The on signal may be transmitted in a state where one battery pack 14 is mounted.
The controller 18 that has received the ON signal obtains the rotation detection signal of the sensor substrate 116 from the signal line 57 by the microcomputer, acquires the rotation state of the rotor 52 of the motor 20, and determines the switching element according to the acquired rotation state. The rotor 52 is rotated by controlling on / off and passing an exciting current in order through the power supply line 56 to the coils 112 of each phase of the stator 50.
The rotation of the rotor 52 causes the motor shaft 22 to rotate. The rotation of the motor shaft 22 is transmitted to the spindle 26, and a rotational force is applied to the cutting blade 30 mounted on the spindle 26. The lawn mower 1 performs an operation of mowing the lawn with a cutting blade 30 rotated horizontally (parallel to the ground) around a vertical axis (rotary blade type).
The user pushes the handle portion 4 forward to cause the lawn mower 1 to travel on the grassy ground via the wheels 12 and to cut the grass and prepare the grass surface.
　続いて、かような芝刈機１が奏し得る作用効果が説明される。
　芝刈機１は、ステータコア１２０と、ステータコア１２０に一体成形されるインシュレータ１２２と、インシュレータ１２２に保持される複数のコイル１１２と、ステータコア１２０に対して回転可能なロータ５２と、を有するモータ２０を備えており、ステータコア１２０におけるインシュレータ１２２と接触する面には、他の部分に対して凹む凹部１２７が設けられている。よって、インシュレータ１２２の一体成形時に樹脂が凹部１２７にも流れ込み、その分樹脂が行き渡り易くなって、芝刈機１は、成形不良が防止された状態でステータコア１２０にインシュレータ１２２が一体成形されるモータ２０を備えることとなる。
　又、ステータコア１２０は、コイル１１２の内側に配置される複数のティース１２６を有しており、インシュレータ１２２は、ティース１２６を被覆するティース被覆部１３２を有しており、凹部１２７は、ティース１２６に設けられる。よって、コンパクト性及び出力の確保のために薄くされ易いティース被覆部１３２における樹脂の流動性を良好にして、インシュレータ１２２の成形不良が更に効果的に防止される。
　更に、ティース１２６は、ステータコア１２０の円筒状部１２４の内周面から径方向内方に突出しており、凹部１２７は、ステータコア１２０におけるティース１２６の周方向両側の面にそれぞれ設けられており、各凹部１２７は、径方向において互いにずれている。よって、成形性良好化のための凹部１２７が設けられながら、ティース１２６の周方向の幅が、周方向において互いにずれなかった場合に比べてより大きく確保され、ステータコア１２０内の凹部１２７付近における磁束の通過が極力阻害されず、出力の低下が極力抑制される。 Then, the effect which such a lawn mower 1 can show | play is demonstrated.
The lawn mower 1 includes a motor 20 having a stator core 120, an insulator 122 integrally formed with the stator core 120, a plurality of coils 112 held by the insulator 122, and a rotor 52 that can rotate with respect to the stator core 120. The surface of the stator core 120 that contacts the insulator 122 is provided with a recess 127 that is recessed with respect to other portions. Therefore, when the insulator 122 is integrally molded, the resin also flows into the recess 127, and the resin is easily spread accordingly. In the lawn mower 1, the motor 20 in which the insulator 122 is integrally molded with the stator core 120 in a state where molding defects are prevented. Will be provided.
In addition, the stator core 120 has a plurality of teeth 126 disposed inside the coil 112, the insulator 122 has a teeth covering portion 132 that covers the teeth 126, and the recess 127 is formed on the teeth 126. Provided. Therefore, the fluidity of the resin in the tooth covering portion 132 that is easily thinned to ensure compactness and output is improved, and the molding failure of the insulator 122 is further effectively prevented.
Furthermore, the teeth 126 protrude radially inward from the inner peripheral surface of the cylindrical portion 124 of the stator core 120, and the recesses 127 are provided on both surfaces of the stator core 120 in the circumferential direction of the teeth 126, respectively. The recesses 127 are offset from each other in the radial direction. Therefore, the width of the teeth 126 in the circumferential direction is ensured larger than that in the case where the recesses 127 for improving formability are provided, and the magnetic flux in the vicinity of the recesses 127 in the stator core 120 is secured. Is not inhibited as much as possible, and the decrease in output is suppressed as much as possible.
　加えて、芝刈機１は、ステータコア１２０と、ステータコア１２０に一体成形されるインシュレータ１２２と、インシュレータ１２２に保持される複数のコイル１１２と、ステータコア１２０に対して回転可能なロータ５２と、を有するモータ２０を備えており、インシュレータ１２２には、他の部分に対して突出する凸部１３７が設けられている。よって、インシュレータ１２２の一体成形時に樹脂が凸部１３７に相当する型内の空間にも流れ込み、その分樹脂が行き渡り易くなって、芝刈機１は、成形不良が防止された状態でステータコア１２０にインシュレータ１２２が一体成形されるモータ２０を備えることとなる。
　又、ステータコア１２０は、コイル１１２の内側に配置され周方向に並ぶ複数のティース１２６を有しており、インシュレータ１２２は、複数のティース１２６の間を被覆する円筒部１３３を有しており、凸部１３７は、円筒部１３３に設けられる。よって、ティース１２６外側のコイル１１２のための空間を減らさず、十分な大きさのコイル１１２と重ならずに、良好な成形のための凸部１３７が設けられる。
　更に、芝刈機１は、ステータコアアッセンブリ１１０において、ステータコア１２０の凹部１２７及びインシュレータ１２２の凸部１３７の双方を有している。よって、インシュレータ１２２の一体成形時に樹脂が十分に流れ易くなり、成形不良が防止された状態でステータコア１２０にインシュレータ１２２が一体成形されるモータ２０を備えた芝刈機１が提供される。 In addition, the lawn mower 1 includes a stator core 120, an insulator 122 formed integrally with the stator core 120, a plurality of coils 112 held by the insulator 122, and a rotor 52 that can rotate with respect to the stator core 120. 20, and the insulator 122 is provided with a convex portion 137 that protrudes with respect to other portions. Therefore, when the insulator 122 is integrally molded, the resin flows into the space in the mold corresponding to the convex portion 137, and the resin is easily spread accordingly, so that the lawn mower 1 is in the insulator core 120 with the molding defect prevented. The motor 20 with which 122 is integrally formed will be provided.
Further, the stator core 120 has a plurality of teeth 126 arranged inside the coil 112 and arranged in the circumferential direction. The insulator 122 has a cylindrical portion 133 that covers between the plurality of teeth 126, and is convex. The part 137 is provided in the cylindrical part 133. Therefore, the space for the coil 112 outside the teeth 126 is not reduced, and the convex portion 137 for good molding is provided without overlapping with the sufficiently large coil 112.
Further, the lawn mower 1 has both the concave portion 127 of the stator core 120 and the convex portion 137 of the insulator 122 in the stator core assembly 110. Therefore, the lawn mower 1 is provided that includes the motor 20 in which the insulator 122 is integrally formed with the stator core 120 in a state in which the resin is sufficiently easily flown at the time of integral molding of the insulator 122 and molding defects are prevented.
　尚、本発明は上記第１形態及びその変更例に限定されず、例えば次のような変更が更に適宜施される。
　凹部１２７及び凸部１３７の少なくとも一方は、省略されても良い。凹部１２７及び凸部１３７の少なくとも一方の本数は、増減されても良い。
　凹部１２７は、ティース１２６の周方向両側の面の双方ではなく、何れか一方の面に配置されても良いし、他のステータコア１２０とインシュレータ１２２との接触部分に配置されても良い。
　凹部１２７は、互いに対向するティース１２６の上下の面においてそれぞれ設けられても良い。これらの場合、上面の凹部１２７と下面の凹部１２７とは、径方向において互いにずれていても良い。即ち、上面における凹部１２７から下方に向かう仮想直線が、下面における凹部１２７の間に至るようにされていても良い。
　同様に、凹部１２７は、ティース１２６の上面と側面（上下及び径方向に延びる面）とに設けられたり、ティース１２６の下面と側面とに設けられたりしても良い。これらの場合においても、一方の凹部１２７と他方の凹部１２７とは、径方向において互いにずれていても良い。
　各ティース１２６の一方の面における各凹部１２７の少なくとも一部と、他方の面における各凹部１２７少なくとも一部とは、径方向において互いにずれていなくても良い。
　凸部１３７は、インシュレータ１２２の表面における他の部分に配置されても良い。
　ステータコア１２０の外周面にインシュレータ１２２が配置されても良い。この場合、凹部１２７及び凸部１３７の少なくとも一方は、ステータコア１２０の外周面及びインシュレータ１２２の少なくとも一方に配置されても良い。 In addition, this invention is not limited to the said 1st form and its modification, For example, the following changes are given further suitably.
At least one of the concave portion 127 and the convex portion 137 may be omitted. The number of at least one of the concave portion 127 and the convex portion 137 may be increased or decreased.
The concave portion 127 may be disposed on either one of the surfaces of the teeth 126 on both sides in the circumferential direction, or may be disposed on a contact portion between the other stator core 120 and the insulator 122.
The recesses 127 may be provided on the upper and lower surfaces of the teeth 126 facing each other. In these cases, the concave portion 127 on the upper surface and the concave portion 127 on the lower surface may be shifted from each other in the radial direction. That is, an imaginary straight line extending downward from the recess 127 on the upper surface may reach between the recesses 127 on the lower surface.
Similarly, the concave portion 127 may be provided on the upper surface and the side surface (surface extending in the vertical and radial directions) of the tooth 126, or may be provided on the lower surface and the side surface of the tooth 126. Also in these cases, the one recess 127 and the other recess 127 may be shifted from each other in the radial direction.
At least a part of each recess 127 on one surface of each tooth 126 and at least a part of each recess 127 on the other surface may not be shifted from each other in the radial direction.
The convex portion 137 may be disposed at another portion on the surface of the insulator 122.
An insulator 122 may be disposed on the outer peripheral surface of the stator core 120. In this case, at least one of the concave portion 127 and the convex portion 137 may be disposed on at least one of the outer peripheral surface of the stator core 120 and the insulator 122.
　ハウジングについて、本体ハウジング１０とモータハウジング６０とスピンドルハウジング６６の少なくとも何れか２つが一体とされたり、これらのハウジングの少なくとも何れかを更に分割したりする等、その構成は様々に変更されても良い。
　電源線５６の着脱自在な接続は、ネジ止めに代えて、あるいはネジ止めと共に、爪（接続突起部）と爪受け（被接続部）によるもの等とすることができる。
　センサ基板１１６は、端子ユニット１１４に取り付けられず、インシュレータ１２２に取り付けられても良い。又、センサ基板１１６は、端子ユニット１１４及びインシュレータ１２２の双方に取り付けられても良い。
　インシュレータ１２２は、一連ではなく、複数の部分を有していても良い。
　電源線５６、コイル１１２に係る導線、信号線５７、及びその他のリード線の少なくとも何れかは、例えばコイル連絡導線１４６がコイル１１２と別のリード線とされて互いに電気的に接続されるようにする等、複数の短線が電気的に接続されたものであっても良い。 Regarding the housing, at least any two of the main body housing 10, the motor housing 60, and the spindle housing 66 may be integrated, or at least one of these housings may be further divided. .
The detachable connection of the power supply line 56 can be made by a claw (connection projection part) and a claw receiver (connected part) instead of or together with screwing.
The sensor substrate 116 may be attached to the insulator 122 without being attached to the terminal unit 114. The sensor substrate 116 may be attached to both the terminal unit 114 and the insulator 122.
The insulator 122 may have a plurality of portions instead of a series.
For example, at least one of the power supply line 56, the conductive line related to the coil 112, the signal line 57, and other lead wires is such that the coil connection conductive wire 146 is a separate lead wire from the coil 112 and is electrically connected to each other. For example, a plurality of short lines may be electrically connected.
　バッテリ装着部１６に代えて電源コードが設けられて商用電源駆動とされたり、コイル１１２、ヒュージング端子１６０及び電源線５６の少なくとも何れかの数が増減されたり、コイル１１２の導線を案内する溝がティース被覆部１３２の根元を一周するように設けられたり、当該溝がより少なくあるいは短くされたり、各種のネジ及びネジ孔等の数が増減されたり、端子ユニット１１４の突起部及び孔の少なくとも一方の数が増減されたり、端子ユニット１１４のステータコア１２０に対する係合部（ピン部）の数が増減されたり、これら係合部及び被係合部の係合が一対の突起間へのリブの挿入とされたり、他の係合部、接続部、ネジ止め部、保持部、及び取り付け部の少なくとも何れかが他の構造あるいは形式のものに変更されたりする等、各種部材、部分の個数、設置の有無、材質、構造、及び形式の少なくとも何れか等は、適宜変更されても良い。
　更に、刈刃３０が左右方向を軸方向としてその周りで回転する円筒状のリール刃であるリール刃型を始めとする他の形式の芝刈機、ひいては他の電動作業機等に、本発明が適用されても良い。例えば、本発明は、高出力の製品に適用され、電動工具の内のチェーンソー、ブロワ、あるいはグラインダ、又は園芸工具の内の草刈機若しくは生垣バリカン、あるいはエアを動力とするエア工具用の空気圧縮機に適用される。エア工具用の空気圧縮機のように、作業を行う作業機を作動させるための機器は、電動作業機に含められる。
　本発明の上述の効果は、特に、比較的大型のブラシレスモータ（ステータコア１２０の外径（直径）が例えば８０ミリメートル以上）において顕著に発揮される。 A power cord is provided in place of the battery mounting portion 16 to drive a commercial power source, or at least one of the number of the coil 112, the fusing terminal 160, and the power source line 56 is increased or decreased, or a groove that guides the conductive wire of the coil 112 Is provided so as to go around the base of the teeth covering portion 132, the groove is made smaller or shorter, the number of various screws and screw holes is increased or decreased, or at least the protrusions and holes of the terminal unit 114 One number is increased or decreased, the number of engaging portions (pin portions) of the terminal unit 114 with respect to the stator core 120 is increased, or the engagement of these engaging portions and engaged portions is the rib between the pair of protrusions. It may be inserted, or at least one of the other engaging part, connecting part, screwing part, holding part, and attaching part may be changed to another structure or type Etc., various members, the number of parts, the presence or absence of installation, material, structure, and at least one such form may be appropriately changed.
Furthermore, the present invention can be applied to other types of lawn mowers, such as a reel blade mold, which is a cylindrical reel blade that rotates about the left and right direction as an axial direction, and other electric working machines. May be applied. For example, the present invention is applied to a high-power product, and is an air compression for a chain saw, blower, or grinder in a power tool, a mower or hedge clipper in a garden tool, or an air tool powered by air. Applied to the machine. A device for operating a working machine that performs work, such as an air compressor for an air tool, is included in the electric working machine.
The above-described effects of the present invention are particularly remarkable in a relatively large brushless motor (the outer diameter (diameter) of the stator core 120 is, for example, 80 mm or more).
［第２形態］
　図９は、本発明の第２形態に係る芝刈機の図７相当図である。図１０は、本発明の第２形態に係る芝刈機の図８相当図である。
　第２形態に係る芝刈機は、ステータコアアッセンブリを除き、第１形態と同様に成る。第１形態と同様に成る部材及び部分については、同一の符号が付され、適宜説明が省略される。 [Second form]
FIG. 9 is a view corresponding to FIG. 7 of a lawn mower according to the second embodiment of the present invention. FIG. 10 is a view corresponding to FIG. 8 of a lawn mower according to the second embodiment of the present invention.
The lawn mower according to the second embodiment is the same as the first embodiment except for the stator core assembly. Members and portions that are the same as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.
　第２形態に係るステータコアアッセンブリ２１０のステータコア２２０は、第２凹部２２７が追加されていることを除き、第１形態のステータコア１２０と同様に成る。
　ステータコア２２０の円筒状部２２４のティース１２６間における上下及び周方向に延びる内周面には、複数（各面５本）の上下に延びる溝状の第２凹部２２７が形成されている。各面において、各第２凹部２２７は、周方向に等間隔に並んでおり、周方向両端の第２凹部２２７は、ステータコアアッセンブリ２１０のインシュレータ２２２の円筒部２３３の溝１３５の下方に配置されている。各第２凹部２２７は、内周面を上下方向で貫いている。
　円筒部２３３のティース１２６間の各部分は、各第２凹部２２７に入り込んだ第２筋部２３６を有している。 The stator core 220 of the stator core assembly 210 according to the second embodiment is the same as the stator core 120 of the first embodiment except that a second recess 227 is added.
On the inner peripheral surface extending in the vertical and circumferential directions between the teeth 126 of the cylindrical portion 224 of the stator core 220, a plurality of (five surfaces) groove-shaped second concave portions 227 extending in the vertical direction are formed. On each surface, the second recesses 227 are arranged at equal intervals in the circumferential direction, and the second recesses 227 at both ends in the circumferential direction are disposed below the groove 135 of the cylindrical portion 233 of the insulator 222 of the stator core assembly 210. Yes. Each second recess 227 penetrates the inner peripheral surface in the vertical direction.
Each part between the teeth 126 of the cylindrical part 233 has the 2nd stripe | line | muscle part 236 which entered each 2nd recessed part 227. FIG.
　第２形態に係る芝刈機は、ステータコア２２０と、ステータコア２２０に一体成形されるインシュレータ２２２と、インシュレータ２２２に保持される複数のコイル１１２と、ステータコア２２０に対して回転可能なロータ５２と、を有するモータを備えており、ステータコア２２０におけるインシュレータ２２２と接触する面には、他の部分に対して凹む第２凹部２２７が設けられており、第２凹部２２７は、ティース１２６の間の部分に設けられる。よって、インシュレータ２２２の一体成形時に樹脂が第２凹部２２７にも流れ込み、その分樹脂が行き渡り易くなって、第２形態に係る芝刈機は、成形不良が防止された状態でステータコア２２０にインシュレータ２２２が一体成形されるモータを備えることとなる。 The lawn mower according to the second embodiment includes a stator core 220, an insulator 222 formed integrally with the stator core 220, a plurality of coils 112 held by the insulator 222, and a rotor 52 that can rotate with respect to the stator core 220. A surface of the stator core 220 that is in contact with the insulator 222 is provided with a second recess 227 that is recessed with respect to other portions, and the second recess 227 is provided in a portion between the teeth 126. . Therefore, when the insulator 222 is integrally molded, the resin also flows into the second recess 227, and the resin easily spreads accordingly. In the lawn mower according to the second embodiment, the insulator 222 is attached to the stator core 220 in a state where molding defects are prevented. A motor that is integrally molded is provided.
　尚、上記第２形態は、第１形態と同様の変更例を適宜有する。
　更に、第２凹部２２７は、周方向に等間隔に配置されなくても良いし、溝１３５の下方に配置されなくても良い。第２凹部２２７の数は、各面５本から増減されても良く、面毎（ティース１２６間毎）に異なっていても良い。第２凹部２２７のみが設けられ、凹部１２７（第１凹部）及び凸部１３７の少なくとも一方が省略されても良い。 In addition, the said 2nd form has a modification similar to a 1st form suitably.
Further, the second recesses 227 do not have to be arranged at equal intervals in the circumferential direction, and may not be arranged below the groove 135. The number of the second recesses 227 may be increased or decreased from five on each surface, and may be different for each surface (for each tooth 126). Only the second concave portion 227 may be provided, and at least one of the concave portion 127 (first concave portion) and the convex portion 137 may be omitted.
［第３形態］
　図１１は、本発明の第３形態に係る芝刈機の図５相当図である。図１２は、本発明の第３形態に係る芝刈機の図７相当図である。図１３は、本発明の第３形態に係る芝刈機の図８相当図である。
　第３形態に係る芝刈機は、ステータコアアッセンブリを除き、第１形態と同様に成る。第１形態と同様に成る部材及び部分については、同一の符号が付され、適宜説明が省略される。 [Third embodiment]
FIG. 11 is a view corresponding to FIG. 5 of a lawn mower according to the third embodiment of the present invention. FIG. 12 is a view corresponding to FIG. 7 of a lawn mower according to the third embodiment of the present invention. FIG. 13 is a view corresponding to FIG. 8 of a lawn mower according to a third embodiment of the present invention.
The lawn mower according to the third embodiment is the same as the first embodiment except for the stator core assembly. Members and portions that are the same as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.
　第３形態に係るステータコアアッセンブリ３１０のステータコア３２０は、ティース３２６において凹部１２７が省略されていることを除き、第１形態のステータコア１２０と同様に成る。ティース３２６の周方向両側の面は、平坦である。
　ステータコアアッセンブリ３１０のインシュレータ３２２のティース被覆部３３２は、筋部１３６を有していない。
　又、インシュレータ３２２のティース被覆部３３２における周方向両側の面（上下及び径方向に延びる面）には、他の部分に対して周方向外側に突出する第２凸部３３７が、上下に延びるように複数（各面６本）形成されている。各面において、各第２凸部３３７は、径方向に等間隔に並んでおり、径方向両端の第２凸部３２７は、円筒部１３３の溝１３５の隣接部位又はティース被覆部３３２の壁部１３４の隣接部位に配置されている。各第２凸部３３７は、ティース被覆部３３２における周方向両側の面を上下方向で貫いている。 The stator core 320 of the stator core assembly 310 according to the third embodiment is the same as the stator core 120 of the first embodiment except that the recess 127 is omitted from the teeth 326. The surfaces on both sides in the circumferential direction of the teeth 326 are flat.
The teeth covering portion 332 of the insulator 322 of the stator core assembly 310 does not have the stripe portion 136.
Moreover, the 2nd convex part 337 which protrudes on the circumferential direction outer side with respect to another part is extended on the surface of the both sides of the circumferential direction in the teeth coating | coated part 332 of the insulator 322 (surface extended in the radial direction) so that it may extend up and down. Are formed (six on each side). On each surface, the second convex portions 337 are arranged at equal intervals in the radial direction, and the second convex portions 327 at both ends in the radial direction are adjacent portions of the groove 135 of the cylindrical portion 133 or the wall portion of the teeth covering portion 332. It is arrange | positioned at the adjacent part of 134. Each 2nd convex part 337 has penetrated the surface of the circumferential direction both sides in teeth covering part 332 in the up-and-down direction.
　第３形態に係る芝刈機は、ステータコア３２０と、ステータコア３２０に一体成形されるインシュレータ３２２と、インシュレータ３２２に保持される複数のコイル１１２と、ステータコア３２０に対して回転可能なロータ５２と、を有するモータを備えており、インシュレータ３２２には、ステータコア３２０のティース３２６を被覆するティース被覆部３３２の周方向両側の面に対して外側に突出する第２凸部３３７が設けられている。
　よって、インシュレータ３２２の一体成形時に樹脂が第２凸部３３７に相当する型内の空間にも流れ込み、その分樹脂が行き渡り易くなって、第３形態の芝刈機は、成形不良が防止された状態でステータコア３２０にインシュレータ３２２が一体成形されるモータを備えることとなる。
　又、第２凸部３３７がコイル１１２の巻き線方向である上下方向に延びた状態でティース被覆部３３２に設けられるため、第２凸部３３７にコイル１１２の巻き線を沿わせることができ、コイル１１２の巻き線が、曲がりの発生が防止された状態で適切に巻かれることとなる。 The lawn mower according to the third embodiment includes a stator core 320, an insulator 322 formed integrally with the stator core 320, a plurality of coils 112 held by the insulator 322, and a rotor 52 rotatable with respect to the stator core 320. A motor is provided, and the insulator 322 is provided with second protrusions 337 that protrude outward from the surfaces on both sides in the circumferential direction of the teeth covering portion 332 that covers the teeth 326 of the stator core 320.
Therefore, when the insulator 322 is integrally molded, the resin flows into the space in the mold corresponding to the second convex portion 337, and the resin is easily spread accordingly, and the lawn mower according to the third embodiment is in a state where molding defects are prevented. Thus, a motor in which the insulator 322 is integrally formed with the stator core 320 is provided.
In addition, since the second convex portion 337 is provided in the teeth covering portion 332 in a state of extending in the vertical direction that is the winding direction of the coil 112, the winding of the coil 112 can be placed along the second convex portion 337, The winding of the coil 112 is appropriately wound in a state where the occurrence of bending is prevented.
　尚、上記第３形態は、第１形態及び第２形態と同様の変更例を適宜有する。
　更に、第２凸部３３７は、径方向に等間隔に配置されなくても良いし、溝１３５の隣接部位又は壁部１３４の隣接部位に配置されなくても良い。第２凸部３３７の数は、各面６本から増減されても良く、面毎に異なっていても良い。第２凸部３３７及び凹部１２７（筋部１３６）の双方が設けられても良いし、第２凸部３３７及び第２凹部２２７（第２筋部２３６）の双方が設けられても良いし、第２凸部３３７並びに凹部１２７及び第２凹部２２７が設けられても良いし、凸部１３７及び第２凸部３３７並びに凹部１２７及び第２凹部２２７が設けられても良い。 In addition, the said 3rd form has a modification similar to the 1st form and the 2nd form suitably.
Further, the second convex portions 337 may not be arranged at equal intervals in the radial direction, and may not be arranged at an adjacent portion of the groove 135 or an adjacent portion of the wall portion 134. The number of the 2nd convex parts 337 may be increased / decreased from six each surface, and may differ for every surface. Both the second convex portion 337 and the concave portion 127 (streak portion 136) may be provided, or both the second convex portion 337 and the second concave portion 227 (second stripe portion 236) may be provided. The second convex portion 337, the concave portion 127, and the second concave portion 227 may be provided, or the convex portion 137, the second convex portion 337, the concave portion 127, and the second concave portion 227 may be provided.
　１・・芝刈機（園芸工具，電動作業機）、２０・・モータ、５２・・ロータ、１１２・・コイル、１２０，２２０，３２０・・ステータコア、１２２，２２２，３２２・・インシュレータ、１２６，３２６・・ティース、１２７・・凹部、１３２，３３２・・ティース被覆部、１３３・・円筒部、１３７・・凸部、２２７・・第２凹部、３３７・・第２凸部。 1. Lawn mower (garden tools, electric working machine), 20. Motor, 52. Rotor, 112, Coil, 120, 220, 320, Stator core, 122, 222, 322, Insulator, 126, 326 .. Teeth, 127 .. concave portion, 132, 332 .. Teeth covering portion, 133 .. cylindrical portion, 137 .. convex portion, 227 .. second concave portion, 337 .. second convex portion.

Claims (11)

  1. 　ステータコアと、
    　前記ステータコアに一体成形されるインシュレータと、
    　前記インシュレータに保持される複数のコイルと、
    　前記ステータコアに対して回転可能なロータと、
    を有するモータを備えており、
    　前記ステータコアにおける前記インシュレータと接触する面には、他の部分に対して凹む凹部が設けられている
    ことを特徴とする電動作業機。     A stator core;
    An insulator formed integrally with the stator core;
    A plurality of coils held by the insulator;
    A rotor rotatable with respect to the stator core;
    A motor having
    The electric working machine characterized in that a concave portion that is recessed with respect to another portion is provided on a surface of the stator core that contacts the insulator.
  2. 　前記ステータコアは、前記コイルの内側に配置される複数のティースを有しており、
    　前記インシュレータは、前記ティースを被覆するティース被覆部を有しており、
    　前記凹部は、前記ティースに設けられる
    ことを特徴とする請求項１に記載の電動作業機。     The stator core has a plurality of teeth disposed inside the coil,
    The insulator has a teeth covering portion that covers the teeth,
    The electric working machine according to claim 1, wherein the recess is provided in the teeth.
  3. 　前記ティースは、前記ステータコアの円筒状部の内周面から径方向内方に突出しており、
    　前記凹部は、前記ティースにおける複数の面にそれぞれ設けられており、
    　各前記凹部は、径方向において互いにずれている
    ことを特徴とする請求項２に記載の電動作業機。     The teeth protrude radially inward from the inner peripheral surface of the cylindrical portion of the stator core,
    The recesses are respectively provided on a plurality of surfaces of the teeth.
    The electric working machine according to claim 2, wherein the recesses are displaced from each other in the radial direction.
  4. 　前記凹部は、前記ティースの間の部分に設けられる
    ことを特徴とする請求項２又は請求項３に記載の電動作業機。     The electric working machine according to claim 2, wherein the recess is provided in a portion between the teeth.
  5. 　前記ティース被覆部における前記ティースの根元を被覆する部分に、円筒状部を有する前記ステータコアの軸方向に延びる溝が形成されている
    ことを特徴とする請求項２ないし請求項４の何れかに記載の電動作業機。     The groove | channel extended in the axial direction of the said stator core which has a cylindrical part is formed in the part which coat | covers the base of the said teeth in the said teeth coating | coated part, The Claim 2 thru | or 4 characterized by the above-mentioned. Electric work machine.
  6. 　ステータコアと、
    　前記ステータコアに一体成形されるインシュレータと、
    　前記インシュレータに保持される複数のコイルと、
    　前記ステータコアに対して回転可能なロータと、
    を有するモータを備えており、
    　前記インシュレータには、他の部分に対して突出する凸部が設けられている
    ことを特徴とする電動作業機。     A stator core;
    An insulator formed integrally with the stator core;
    A plurality of coils held by the insulator;
    A rotor rotatable with respect to the stator core;
    A motor having
    The insulator is provided with a convex portion that protrudes with respect to another portion.
  7. 　前記ステータコアにおける前記インシュレータと接触する面には、他の部分に対して凹む凹部が設けられている
    ことを特徴とする請求項６に記載の電動作業機。     The electric working machine according to claim 6, wherein the surface of the stator core that comes into contact with the insulator is provided with a recessed portion that is recessed with respect to another portion.
  8. 　複数の前記コイルの間に、コイル連絡導線が形成されており、
    　前記コイル連絡導線は、前記凸部の起立面に接している
    ことを特徴とする請求項６又は請求項７に記載の電動作業機。     A coil connecting conductor is formed between the plurality of coils,
    The electric working machine according to claim 6 or 7, wherein the coil connecting conductor is in contact with an upright surface of the convex portion.
  9. 　前記ステータコアは、前記コイルの内側に配置され周方向に並ぶ複数のティースを有しており、
    　前記インシュレータは、複数の前記ティースの間を被覆する円筒部を有しており、
    　前記凸部は、前記円筒部に設けられる
    ことを特徴とする請求項６ないし請求項８の何れかに記載の電動作業機。     The stator core has a plurality of teeth arranged inside the coil and arranged in the circumferential direction,
    The insulator has a cylindrical portion that covers a plurality of the teeth,
    The electric working machine according to claim 6, wherein the convex portion is provided on the cylindrical portion.
  10. 　前記ステータコアは、前記コイルの内側に配置される複数のティースを有しており、
    　前記インシュレータは、前記ティースを被覆するティース被覆部を有しており、
    　前記凸部は、前記ティース被覆部に設けられる
    ことを特徴とする請求項６ないしは請求項９の何れかに記載の電動作業機。     The stator core has a plurality of teeth disposed inside the coil,
    The insulator has a teeth covering portion that covers the teeth,
    The electric working machine according to any one of claims 6 to 9, wherein the convex portion is provided on the teeth covering portion.
  11. 　前記ティース被覆部における前記ティースの根元を被覆する部分に、円筒状部を有する前記ステータコアの軸方向に延びる溝が形成されている
    ことを特徴とする請求項１０に記載の電動作業機。     11. The electric working machine according to claim 10, wherein a groove that extends in the axial direction of the stator core having a cylindrical portion is formed in a portion of the teeth covering portion that covers the base of the tooth.
PCT/JP2019/008185 2018-03-30 2019-03-01 Electric work machine WO2019187992A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
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US11713754B2 (en) * 2018-07-11 2023-08-01 Hanon Systems Device for driving a compressor and method for assembling the device
EP4033879A4 (en) * 2019-10-11 2024-04-17 Ariens Co Electric motor and blade assembly for a lawn mower

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023145747A1 (en) * 2022-01-28 2023-08-03 パナソニックＩｐマネジメント株式会社 Stator and motor

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JP2004248471A (en) * 2003-02-17 2004-09-02 Yaskawa Electric Corp Stator piece and motor stator using the same
JP2016019377A (en) * 2014-07-09 2016-02-01 トヨタ自動車株式会社 Stator for motor
JP2018042400A (en) * 2016-09-08 2018-03-15 ダイキン工業株式会社 Stator, motor, and compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004248471A (en) * 2003-02-17 2004-09-02 Yaskawa Electric Corp Stator piece and motor stator using the same
JP2016019377A (en) * 2014-07-09 2016-02-01 トヨタ自動車株式会社 Stator for motor
JP2018042400A (en) * 2016-09-08 2018-03-15 ダイキン工業株式会社 Stator, motor, and compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11713754B2 (en) * 2018-07-11 2023-08-01 Hanon Systems Device for driving a compressor and method for assembling the device
EP4033879A4 (en) * 2019-10-11 2024-04-17 Ariens Co Electric motor and blade assembly for a lawn mower

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