WO2015198860A1 - Dispositif de travail entraîné électriquement - Google Patents

Dispositif de travail entraîné électriquement Download PDF

Info

Publication number
WO2015198860A1
WO2015198860A1 PCT/JP2015/066697 JP2015066697W WO2015198860A1 WO 2015198860 A1 WO2015198860 A1 WO 2015198860A1 JP 2015066697 W JP2015066697 W JP 2015066697W WO 2015198860 A1 WO2015198860 A1 WO 2015198860A1
Authority
WO
WIPO (PCT)
Prior art keywords
brush
armature
rotor
brush support
working machine
Prior art date
Application number
PCT/JP2015/066697
Other languages
English (en)
Japanese (ja)
Inventor
一 菊池
健 冨山
Original Assignee
日立工機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立工機株式会社 filed Critical 日立工機株式会社
Publication of WO2015198860A1 publication Critical patent/WO2015198860A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/66—Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes

Definitions

  • the present invention relates to an electric working machine capable of switching a rotation direction of a rotor by changing a direction of a current supplied to an armature provided in the rotor.
  • an electric working machine such as a drill or a driver can switch the rotation direction of a rotor that transmits torque to a tip tool.
  • Such an electric working machine is described in Patent Document 1.
  • the electric working machine described in Patent Literature 1 includes a housing and an electric motor provided in the housing.
  • the electric motor includes a stator and a rotor, and the stator is provided with a switch mechanism.
  • the switch mechanism includes two supports made of an insulating material. Contacts are provided on the two supports. A switching element is provided at each end of the contact, and the switching element is connected to a contact provided on the housing.
  • the contact is connected to the brush of the brush holder.
  • the brush contacts a commutator provided on the rotor.
  • Patent Document 1 Since the electric working machine described in Patent Document 1 is provided with a contact point on a support made of an insulating material, it is possible to ensure insulation between the switching element and the brush. However, when the housing is made of metal in order to improve the strength of the housing, there is a problem that insulation between the switching element and the brush becomes insufficient.
  • An object of the present invention is to provide an electric working machine capable of improving the insulation between a switching element and a brush.
  • An electric working machine is an electric working machine capable of changing a rotation direction of the rotor by changing a direction of a current supplied to an armature provided in a rotor of the electric motor, wherein the armature A brush support mechanism for supporting a brush through which a current to be supplied passes, a first switch mechanism provided in a path for supplying a current to the armature and the brush, and having a plurality of contacts; and the first switch mechanism. And a switching element that is connected to the brush and that is connected to or separated from the plurality of contact points to change the direction of the current supplied to the armature.
  • the support member is provided.
  • An electric working machine is an electric working machine capable of changing a direction of a current supplied to an armature provided on a rotor of an electric motor and switching a rotation direction of the rotor.
  • a brush support mechanism that supports a brush through which an electric current supplied to the child passes and is operated by an operator; a path that supplies current to the armature and the brush separately from the brush support mechanism; And a first switch mechanism that switches the rotation direction of the rotor in conjunction with the operation of the brush support mechanism.
  • the brush is provided in the brush support mechanism and the switching element is provided in the support member, the insulation between the switching element and the brush is improved.
  • FIG. 1 It is front sectional drawing which shows embodiment of the electric working machine of this invention. It is a front view of the electric working machine of this invention. It is a schematic diagram which shows the electric circuit in the electric working machine of this invention. It is a disassembled perspective view of the components used for the electric working machine of this invention. It is a disassembled perspective view of the components used for the electric working machine of this invention. It is the perspective view which assembled the components used for the electric working machine of this invention. In the electric working machine of the present invention, it is a left side view with the handle removed. In the electric working machine of the present invention, it is a left side view with the handle removed. In the electric working machine of the present invention, it is a left side view with the handle removed.
  • the electric working machine 10 includes a handle 11 that an operator holds by hand, a housing 12 that is fixed to the handle 11, an inner cover 13 that is fixed to the housing 12, and a gear cover that is fixed to the inner cover 13. 14.
  • the handle 11 is made of synthetic resin
  • the housing 12 is made of metal
  • the metal used for the housing 12 includes, for example, aluminum and magnesium.
  • the inner cover 13 is made of synthetic resin or metal.
  • the gear cover 14 is made of synthetic resin or metal.
  • a power cable 15 is attached to the handle 11, and a plug 16 provided at an end of the power cable 15 is connected to an AC power supply 90.
  • An electric motor 17 is provided across the interior of the housing 12 and the inner cover 13.
  • the electric motor 17 is an AC motor, and the electric motor 17 includes a stator 18 and a rotor 19.
  • a reduction mechanism is provided inside the inner cover 13 and the gear cover 14, and the torque of the rotor 19 is transmitted to the input member of the reduction mechanism.
  • a chuck 20 is provided outside the gear cover 14, and torque of the output member of the speed reduction mechanism is transmitted to the chuck 20. That is, the chuck 20 is connected to the rotor 19 so that power can be transmitted.
  • the chuck 20 holds a tip tool.
  • the axis A1 that is the rotation center of the rotor 19 and the axis B1 that is the rotation center of the chuck 20 are parallel to each other. That is, in the electric working machine 10, the rotor 19 and the chuck 20 are arranged so as to be eccentric from each other.
  • the housing 12 is disposed between the inner cover 13 and the handle 11 in the direction along the axis A ⁇ b> 1, and the inner cover 13 is disposed between the gear cover 14 and the housing 12.
  • a screw member 21 that fixes the housing 12, the inner cover 13, and the gear cover 14 to each other is provided.
  • a screw member 22A for fixing the housing 12 and the handle 11 to each other is provided.
  • the stator 18 is fixed in a cylindrical stator holder 24.
  • Stator 18 has an iron core and coils 23A and 23B wound around the iron core.
  • the stator 18 is an element that functions as a field.
  • the stator holder 24 is integrally formed of an insulating material such as synthetic resin.
  • the stator holder 24 is disposed and fixed in the housing 12. Further, an insulator 25A that covers the coil 23A is provided, and an insulator 25B that covers the coil 23B is provided. Paper can be used as the insulators 25A and 25B.
  • a pair of projecting portions 26 extending in the direction along the axis A1 are provided from the end of the stator holder 24 in the direction along the axis A1, and a connecting portion 35 for connecting the pair of projecting portions 26 is provided. It has been.
  • a shaft hole 27 is provided in the connecting portion 35.
  • a boss portion 42 having a shaft hole 41 is provided on the outer peripheral surface of the stator holder 24. The screw member 22B is inserted into the shaft hole 41 and tightened, and the handle 11 and the stator holder 24 are fixed.
  • the rotor 19 includes an output shaft 28 and an armature 29 attached to the output shaft 28.
  • the armature 29 is obtained by winding a coil around an iron core.
  • a commutator 30 that is attached to the output shaft 28 and supplies current to the armature 29 is provided.
  • the commutator 30 is disposed outside the stator holder 24 and is disposed between the overhang portions 26.
  • the housing 12 includes a cylindrical portion 31, a pair of guide rails 32 extending from the cylindrical portion 31 in the direction along the axis A ⁇ b> 1, and a holding portion 33 that connects the pair of guide rails 32.
  • the pair of guide rails 32 is disposed outside the pair of overhang portions 26 in the radial direction centered on the axis A1.
  • the pair of guide rails 32 are provided in an arc shape within a range of a predetermined angle centered on the axis A1.
  • the holding portion 33 has a cylindrical shape, and a bearing 34 is provided in the holding portion 33.
  • the bearing 34 rotatably supports the output shaft 28. A part of the output shaft 28 is disposed in the shaft hole 27.
  • the overhang portion 26, the guide rail 32, and the bearing 34 are disposed in the handle 11.
  • Notches 36A and 36B are provided at the ends where the pair of guide rails 32 are provided in the direction along the axis A1 of the cylindrical portion 31.
  • the notches 36A and 36B are provided in an arc shape within a predetermined angle range centered on the axis A1.
  • the notches 36A and 36B are arranged in a range different from the range in which the pair of guide rails 32 are arranged in the circumferential direction about the axis A1.
  • a restricting portion 38 is provided at an end portion where the pair of guide rails 32 are provided in a direction along the axis A ⁇ b> 1 of the cylindrical portion 31.
  • the restricting portion 38 is disposed at two places different from the notches 36A and 36B in the circumferential direction of the cylindrical portion 31 with the axis A1 as the center.
  • the range in which the two restricting portions 38 are arranged in the circumferential direction of the cylindrical portion 31 with the axis A1 as the center is the same as the range in which the pair of guide rails 32 are provided.
  • a boss portion 40 having a shaft hole 39 is provided on the outer peripheral surface of the cylindrical portion 31. The screw member 22A is inserted into the shaft hole 39 and tightened. Further, the boss portion 42 is disposed in the notch portion 36B.
  • a trigger 62 is provided on the handle 11.
  • the trigger 62 is operated by an operator.
  • a protrusion 87 is provided on the trigger 62, and the protrusion 87 has a stopper 88.
  • a brush support 43 is attached to the pair of guide rails 32.
  • the brush support 43 is made of an insulating material, for example, a synthetic resin.
  • the brush support 43 is annular, and the brush support 43 includes a pair of arc portions 44, a first plate portion 45 that connects first ends of the pair of arc portions 44, and a second end of the pair of arc portions 44. And a second plate part 46 for connecting the parts to each other.
  • the first plate part 45 and the second plate part 46 are arranged at different positions in the circumferential direction of the brush support 43.
  • first plate portion 45 is disposed at a location corresponding to the notch portion 36A
  • second plate portion 46 is disposed at a location corresponding to the notch portion 36B.
  • Knob portions 47 are provided so as to project outward from the outer peripheral surfaces of the pair of arc portions 44.
  • a brush 51 is attached to the first plate portion 45 of the brush support 43 via a brush holder 50, and a brush 53 is attached to the second plate portion 46 via a brush holder 52.
  • the brushes 51 and 53 are provided inside the brush support 43 in the radial direction with the axis A1 as the center.
  • the two brushes 51 and 53 are arranged at an interval of 180 degrees in the circumferential direction around the axis A1.
  • the brushes 51 and 53 are pushed inward in the radial direction by the elastic body 84, and the brushes 51 and 53 are in contact with the commutator 30.
  • Two slits 54 and 55 are provided on the outer periphery of the second plate portion 46.
  • the slits 54 and 55 are arranged at intervals in the circumferential direction around the axis A1.
  • the slits 54 and 55 are wider in the circumferential direction around the axis A ⁇ b> 1 than the stopper 88.
  • the second plate portion 46 includes a block portion 56 disposed between the slit 54 and the slit 55 in the circumferential direction centering on the axis A1.
  • the arrangement positions of the slits 54 and 55 and the block portion 56 partially overlap with the arrangement position of the stopper 88 in the radial direction centering on the axis A1.
  • the arrangement range of the protrusions 87 includes the arrangement positions of the slits 54 and 55 and the block part 56, and includes the outside of the arrangement positions of the slits 54 and 55 and the block part 56.
  • the second plate portion 46 includes convex portions 57 and 58. The slits 54 and 55 and the block portion 56 are arranged between the convex portion 57 and the convex portion 58 in the circumferential direction centering on the axis A1.
  • a support member 59 is provided on the inner side of the brush support 43 and on the outer side of the guide rail 32 in the radial direction centered on the axis A ⁇ b> 1.
  • the support member 59 is formed of an insulating material, for example, a synthetic resin.
  • the support member 59 includes a cover 60 that covers the brush holder 50 and a cover 61 that covers the brush holder 52.
  • the support member 59 is annular, and the brush support 43 and the support member 59 are positioned and fixed in the circumferential direction about the axis A1.
  • the support member 59 and the brush support 43 can be operated in the circumferential direction about the axis A ⁇ b> 1 with the inner surface of the support member 59 in contact with the outer surface of the guide rail 32.
  • An opening 49 is provided between the edge of the housing 12 and the edge 48 of the handle 11.
  • the openings 49 are arranged at two locations at intervals of 180 degrees in the circumferential direction centered on the axis A1.
  • Two knobs 47 are separately arranged in the opening 49.
  • the brush support 43 is positioned in a direction along the axis A ⁇ b> 1 by the pair of arc portions 44 contacting the edge portion 48 and the restriction portion 38.
  • the main switch 63 is accommodated in the casing 89, and the casing 89 is disposed in the handle 11.
  • the handle 11 is extended from the housing 12 in a direction intersecting with the axis A1.
  • the casing 89 is made of an insulating material, for example, a synthetic resin.
  • the main switch 63 includes contacts 64 and 65 connected to the power cable 15.
  • the main switch 63 includes a contact 66 connected to the coil 23A and a contact 67 connected to the coil 23B.
  • the main switch 63 includes connection pieces 68 and 69. When an operator applies an operating force to the trigger 62, the connection piece 68 connects the contact 64 and the contact 66, and the connection piece 69 and the contact 65.
  • the contact 67 is connected. That is, the main switch 63 connects a path between the AC power supply 90 and the forward / reverse selector switch 70.
  • the contact 64 and the contact 66 are released, and the contact 65 and the contact 67 are released. That is, the main switch 63 blocks the path between the AC power supply 90 and the forward / reverse selector switch 70.
  • a casing 83 is provided inside the handle 11.
  • the casing 83 is formed of an insulating material such as synthetic resin.
  • the forward / reverse selector switch 70 is provided in the casing 83.
  • the forward / reverse selector switch 70 includes a contact 72 connected to the brush 51 via a lead wire 71 and a contact 74 connected to the brush 53 via a lead wire 73. Further, the forward / reverse changeover switch 70 includes a connection piece 75 connected to the contact point 72 and a connection piece 76 connected to the contact point 74.
  • contacts 77 and 78 are provided which are connected to the coil 23A via the lead wire 85 and arranged in parallel with each other.
  • Contacts 79 and 80 are provided which are connected to the coil 23B via a lead wire 86 and arranged in parallel with each other.
  • an operation member 81 for operating the connection pieces 75 and 76 is provided, and a projection 82 is provided on the operation member 81.
  • the operating member 81 is disposed in the casing 83, and the protrusion 82 is exposed outside the casing 83.
  • the connection pieces 75 and 76 are switched to a plurality of states, that is, from the first state to the third state by the operation member 81 operating.
  • connection piece 75 In the first state of the connection piece 75, the connection piece 75 is separated from the contact points 77 and 80, and in the first state of the connection piece 76, the connection piece 76 is separated from the contact points 78 and 79.
  • the connection piece 75 In the second state of the connection piece 75, the connection piece 75 is connected to the contact 77 and is separated from the contact 80. In the second state of the connection piece 76, the connection piece 76 is connected to the contact 79 and is separated from the contact 78.
  • the connection piece 75 In the third state of the connection piece 75, the connection piece 75 is connected to the contact 80 and is separated from the contact 77. In the third state of the connection piece 76, the connection piece 76 is connected to the contact 78 and is separated from the contact 79.
  • the operation member 81 is an element of the forward / reverse selector switch 70.
  • the operator grasps the brush support 43 by hand and rotates it by a predetermined angle in the counterclockwise direction from the first operation position in FIG. Stops at the second operation position shown in FIG.
  • the brush support 43 rotates counterclockwise in FIG. 7
  • the convex portion 57 is pressed against the projection portion 82, and the operation member 81 operates.
  • the operation member 81 operates in conjunction with the operation of the brush support 43.
  • the connection piece 75 is connected to the contact 77 and leaves the contact 80.
  • the connection piece 76 is connected to the contact 79 and is separated from the contact 78 by the operation of the operation member 81. Therefore, the coil 23A is connected to the brush 51 via the lead wires 71 and 85, and the coil 23B is connected to the brush 53 via the lead wires 86 and 73.
  • the brush support 43 rotates clockwise by a predetermined angle in FIG. 10, and stops at a predetermined position as shown in FIG. That is, the stopper 88 and the slit 55 are in the same position in the circumferential direction centering on the axis A1. For this reason, when an operator applies an operating force to the trigger 62, the stopper 88 enters the slit 55, and the trigger 62 operates.
  • the main switch 63 When the trigger 62 operates, the main switch 63 is turned on. That is, the connection piece 68 is connected to the contact point 64, the connection piece 69 is connected to the contact point 65, the voltage of the AC power supply 90 is applied to the brushes 51 and 53, and the rotation is caused by the interaction between the stator 18 and the armature 29. A magnetic field is formed and the rotor 19 rotates.
  • the rotation direction of the rotor 19 is clockwise in FIG. 8, and the rotation direction is referred to as normal rotation.
  • the torque of the rotor 19 is transmitted to the chuck 20 via the speed reduction mechanism, and the tip tool rotates in a predetermined direction.
  • the brushes 51 and 53 come into contact with the commutator 30 around the axis C ⁇ b> 2. That is, when the brush support 43 is stopped at the second operation position in FIG. 8, the contact positions of the brushes 51 and 53 with respect to the commutator 30 are when the brush support 43 is stopped at the first operation position as shown in FIG. In comparison, the rotor 19 moves in the circumferential direction by an angle ⁇ 1 opposite to the rotation direction of the rotor 19.
  • the main switch 63 is turned off. Is done. That is, no voltage is applied to the brushes 51 and 53, and the rotor 19 stops.
  • the operator grasps the brush support 43 with his hand and rotates it clockwise by a predetermined angle from the first operation position in FIG. Stop at the operating position.
  • the brush support 43 rotates in the clockwise direction in FIG. 7
  • the convex portion 58 is pressed against the protruding portion 82 and the operation member 81 operates.
  • the connection piece 75 is connected to the contact 80 and is separated from the contact 77.
  • the connection piece 76 is connected to the contact 78 and is separated from the contact 79 by the operation of the operation member 81.
  • the coil 23A is connected to the brush 53 via the lead wires 73 and 85
  • the coil 23B is connected to the brush 51 via the lead wires 86 and 71.
  • the brush support 43 rotates counterclockwise by a predetermined angle in FIG. 10 and stops at a predetermined position as shown in FIG. That is, the stopper 88 and the slit 54 are in the same position in the circumferential direction centering on the axis A1. For this reason, when an operator applies an operating force to the trigger 62, the stopper 88 enters the slit 54 and the trigger 62 operates.
  • the main switch 63 When the trigger 62 operates, the main switch 63 is turned on. That is, the connection piece 68 is connected to the contact point 64, the connection piece 69 is connected to the contact point 65, the voltage of the AC power supply 90 is applied to the brushes 51 and 53, and the rotation is caused by the interaction between the stator 18 and the armature 29. A magnetic field is formed, and the rotor 19 and the output shaft 28 rotate integrally.
  • the rotation direction of the rotor 19 is counterclockwise in FIG. 9, and the rotation direction is referred to as reverse rotation.
  • the torque of the rotor 19 is transmitted to the chuck 20 via the speed reduction mechanism, and the tip tool rotates in the direction opposite to that shown in FIG.
  • the brushes 51 and 53 come into contact with the commutator 30 around the axis C ⁇ b> 3. That is, when the brush support 43 stops at the third operation position in FIG. 9, the contact position of the brushes 51 and 53 with respect to the commutator 30 is when the brush support 43 stops at the first operation position as shown in FIG. Compared with the rotation direction of the rotor 19, it moves in the circumferential direction by an angle ⁇ 2 in the opposite direction to the rotation direction of the rotor 19.
  • the main switch 63 is turned on. Turned off. That is, no voltage is applied to the brushes 51 and 53, and the rotor 19 stops.
  • the housing 12 is made of metal, the electric working machine 10 in the present embodiment has higher strength than the case where the housing is made of synthetic resin.
  • a forward / reverse selector switch 70 that switches the rotation direction of the rotor 19 between forward rotation and reverse rotation is provided in the casing 83.
  • the casing 83 is made of a synthetic resin that is an insulating material. Therefore, although the housing 12 is made of a conductive material, the insulation between the forward / reverse selector switch 70 and the brushes 51 and 53 can be secured. Furthermore, foreign matter can be prevented from adhering to the contacts 77 to 80 and the connection pieces 75 and 76. Foreign materials include dust and water.
  • the state of the forward / reverse selector switch 70 can be switched from the first state to the third state by an operation in which the operator rotates the brush support 43 by a predetermined angle.
  • the contact positions of the brushes 51 and 53 with respect to the commutator 30 can be changed in the circumferential direction around the axis A1. Therefore, the operation burden on the operator can be reduced.
  • the trigger 62 When the brush support 43 is stopped at the first operation position, the trigger 62 does not operate even when an operation force is applied to the trigger 62, and the main switch 63 is maintained in the off state. Therefore, a voltage can be applied to the brushes 51 and 53 only when the brushes 51 and 53 are in contact with the commutator 30 at neutral points.
  • the coils 23A and 23B are insulated by the insulators 25A and 25B, and are provided in the stator holder 24 made of an insulating material. That is, it has a double insulation structure. Therefore, the insulation of the coils 23A and 23B can be ensured.
  • the electric working machine 10 corresponds to the electric working machine of the present invention
  • the housing 12 corresponds to the housing of the present invention
  • the electric motor 17 corresponds to the electric motor of the present invention
  • the stator 18 corresponds to the stator of the present invention.
  • the rotor 19 corresponds to the rotor of the present invention
  • the chuck 20 corresponds to the holding member of the present invention
  • the stator holder 24 corresponds to the stator holder of the present invention
  • the insulators 25A and 25B are This corresponds to the insulator of the present invention.
  • the armature 29 corresponds to the armature of the present invention
  • the commutator 30 corresponds to the commutator of the present invention
  • the brushes 51 and 53 correspond to the brush of the present invention
  • the forward / reverse switch 70 is provided.
  • the main switch 63 corresponds to the second switch mechanism of the present invention
  • the casing 83 corresponds to the partition member of the present invention
  • the brush support 43 corresponds to the brush of the present invention.
  • the trigger 62 corresponds to the operating member of the present invention
  • the slits 54 and 55 and the block portion 56 correspond to the regulating mechanism of the present invention
  • the contacts 77 to 80 are the plurality of contacts in the present invention.
  • the connection pieces 75 and 76 correspond to the switching element of the present invention.
  • the position of the brush support 43 shown in FIG. 7 corresponds to the first operation position of the present invention
  • the position of the brush support 43 shown in FIG. 8 corresponds to the second operation position of the present invention, as shown in FIG.
  • the position of the brush support 43 corresponds to the third operation position of the present invention.
  • the electric working machine of the present invention includes a drill, a driver, a sander, and a grinder.
  • the electric working machine is a drill
  • the object can be cut by the rotation of the tip tool to form holes and grooves in the object.
  • the electric working machine is a driver
  • the screw member or the bolt can be tightened or loosened by forward rotation or reverse rotation of the tip tool.
  • the tip tool grinds or polishes the object when the grindstone, brush, or diamond cutter as the tip tool is rotated forward or backward.
  • the present invention includes an electric working machine in which the rotor and the holding member are arranged eccentrically, and an electric working machine in which the rotor and the holding member are arranged concentrically.
  • the electric working machine of the present invention is not technically related to the work content based on the rotation direction of the rotor and the rotation direction of the tip tool.
  • the work content includes tightening the screw member and loosening the screw member.
  • clockwise rotation is the forward rotation of the rotor
  • counterclockwise rotation is the reverse rotation of the rotor.
  • FIGS. 7 to 9 which are left side views of the electric working machine as viewed from the handle side, it is possible to grasp the counterclockwise direction as the forward rotation of the rotor and the clockwise direction as the reverse rotation of the rotor. is there.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

L'invention concerne un dispositif de travail entraîné électriquement, tel que la qualité d'isolation entre les composants de commutation et les balais peut être améliorée. Ce dispositif de travail (10) entraîné électriquement est capable de commuter la direction de rotation d'un rotor (19) d'un moteur électrique (17) en changeant la direction du courant fourni à l'induit (29) disposé sur le rotor (19), lequel dispositif de travail entraîné électriquement comprend: un support de balais (43) pour supporter des balais (51, 53) à travers lesquels passe un courant envoyé à l'induit (29); un commutateur de changement avant/arrière qui est disposé sur un trajet pour envoyer le courant à l'induit (29) et qui comprend de multiples contacts; un boîtier (83) dans lequel le commutateur de changement avant/arrière est disposé; et des pièces de connexion qui sont connectées aux balais (51, 53) et qui changent la direction du courant fourni à l'induit (29) selon qu'elles sont connectées aux contacts ou déconnectées de ceux-ci, les pièces de connexion étant disposées à l'intérieur du boîtier (83).
PCT/JP2015/066697 2014-06-24 2015-06-10 Dispositif de travail entraîné électriquement WO2015198860A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-128790 2014-06-24
JP2014128790 2014-06-24

Publications (1)

Publication Number Publication Date
WO2015198860A1 true WO2015198860A1 (fr) 2015-12-30

Family

ID=54937952

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/066697 WO2015198860A1 (fr) 2014-06-24 2015-06-10 Dispositif de travail entraîné électriquement

Country Status (1)

Country Link
WO (1) WO2015198860A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110712305A (zh) * 2018-07-11 2020-01-21 苏州宝时得电动工具有限公司 手持式切割工具
CN114631249A (zh) * 2019-10-31 2022-06-14 工机控股株式会社 电动作业机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342931A (en) * 1981-01-29 1982-08-03 Black & Decker Inc. Brush-shifting and trigger-switch arrangements for a portable tool
JPH03150057A (ja) * 1989-07-15 1991-06-26 Kress Elektrik Gmbh & Co Elektro Motorenfab 電動工具の電気的切り換え用切り換え装置
US5089729A (en) * 1991-03-14 1992-02-18 Black & Decker Inc. Power tool with brush shifting and reversing switch assembly
DE19605202C1 (de) * 1996-02-13 1997-09-18 Atlas Copco Elektrowerkzeuge Elektrowerkzeugmaschine mit Umschalteinrichtung für Rechts-/Linkslauf
JP2003180054A (ja) * 2001-12-10 2003-06-27 Makita Corp 電動工具の正逆切り換え装置
JP2006212758A (ja) * 2005-02-04 2006-08-17 Hitachi Koki Co Ltd 電動工具
JP2007143314A (ja) * 2005-11-18 2007-06-07 Makita Corp 電動工具の正逆切替装置
US20120235520A1 (en) * 2011-03-16 2012-09-20 Hilti Aktiengesellschaft Hand tool

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342931A (en) * 1981-01-29 1982-08-03 Black & Decker Inc. Brush-shifting and trigger-switch arrangements for a portable tool
JPH03150057A (ja) * 1989-07-15 1991-06-26 Kress Elektrik Gmbh & Co Elektro Motorenfab 電動工具の電気的切り換え用切り換え装置
US5089729A (en) * 1991-03-14 1992-02-18 Black & Decker Inc. Power tool with brush shifting and reversing switch assembly
DE19605202C1 (de) * 1996-02-13 1997-09-18 Atlas Copco Elektrowerkzeuge Elektrowerkzeugmaschine mit Umschalteinrichtung für Rechts-/Linkslauf
JP2003180054A (ja) * 2001-12-10 2003-06-27 Makita Corp 電動工具の正逆切り換え装置
JP2006212758A (ja) * 2005-02-04 2006-08-17 Hitachi Koki Co Ltd 電動工具
JP2007143314A (ja) * 2005-11-18 2007-06-07 Makita Corp 電動工具の正逆切替装置
US20120235520A1 (en) * 2011-03-16 2012-09-20 Hilti Aktiengesellschaft Hand tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110712305A (zh) * 2018-07-11 2020-01-21 苏州宝时得电动工具有限公司 手持式切割工具
CN114631249A (zh) * 2019-10-31 2022-06-14 工机控股株式会社 电动作业机

Similar Documents

Publication Publication Date Title
US10569406B2 (en) Work tool
US6632128B2 (en) Angle grinder with electric drive
US10630135B2 (en) Electric power tool
US10608500B2 (en) Electric power tool
JP5387400B2 (ja) 電動刈込機
JP7210261B2 (ja) 電動作業機及び電動作業機用モータにおけるステータの製造方法
US10027196B2 (en) Electric tool
WO2015198860A1 (fr) Dispositif de travail entraîné électriquement
WO2019187992A1 (fr) Machine de travail électrique
US7355314B2 (en) Device for reversing rotational direction of a motor
US6933632B2 (en) Commutating rotary switch
JP6394330B2 (ja) 電動作業機
CN110401306B (zh) 电动作业机
JP2019198158A (ja) 電動作業機
JP2015104770A (ja) 電動工具
US2636136A (en) Electric motor
JP2020188631A (ja) 電動作業機
JP2014033493A (ja) 電動回転機
JP5426312B2 (ja) 手持ち式電動グラインダ
US20120235520A1 (en) Hand tool
JP6018026B2 (ja) 直流モータ
KR101055951B1 (ko) 접속이 안정적인 전류전환장치를 구비하는 전동공구
WO2024203180A1 (fr) Machine de travail
JP7403059B2 (ja) 電動工具
WO2021049124A1 (fr) Machine de travail électrique

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15811696

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 15811696

Country of ref document: EP

Kind code of ref document: A1