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WO2019171721A1 - Outil électrique - Google Patents

Outil électrique Download PDF

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Publication number
WO2019171721A1
WO2019171721A1 PCT/JP2018/047913 JP2018047913W WO2019171721A1 WO 2019171721 A1 WO2019171721 A1 WO 2019171721A1 JP 2018047913 W JP2018047913 W JP 2018047913W WO 2019171721 A1 WO2019171721 A1 WO 2019171721A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
housing
attached
tool holding
holding portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/047913
Other languages
English (en)
Japanese (ja)
Inventor
真 仲村
英治 武藤
賢一 田伏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Makita Corp
Original Assignee
Makita Corp
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 Makita Corp filed Critical Makita Corp
Publication of WO2019171721A1 publication Critical patent/WO2019171721A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the technology disclosed in this specification relates to an electric tool.
  • Japanese Patent Laid-Open No. 2000-135687 discloses a motor, a power transmission mechanism connected to the motor, a housing for housing the motor and the power transmission mechanism, a tip tool holding portion connected to the power transmission mechanism, And a cover that covers at least a part of the tip tool holding portion.
  • the present specification provides a technique capable of preventing an electric tool from being used when the cover is removed.
  • the electric tool includes a motor, a power transmission mechanism connected to the motor, a housing that houses the motor and the power transmission mechanism, a tip tool holding portion connected to the power transmission mechanism, and the tip tool holding You may provide the cover which covers at least one part of a part. In a state where the cover is not attached to the housing, the tip tool holding portion may be locked. In a state where the cover is attached to the housing, the tip tool holding portion may be unlocked.
  • the tip tool holding portion is locked, so that the electric tool cannot be used.
  • the power tool can be disabled.
  • the power tool includes a motor, a power transmission mechanism connected to the motor, a housing that houses the motor and the power transmission mechanism, and a tip connected to the power transmission mechanism.
  • You may provide the cover which covers at least one part of a tool holding part and the said front-end tool holding part. In a state where the cover is not attached to the housing, the tip tool holding portion may be locked. In a state where the cover is attached to the housing, the tip tool holding portion may be unlocked.
  • the tip tool holding portion is locked, so that the electric tool cannot be used.
  • the power tool can be disabled.
  • the power tool is attached to the housing and is engaged with the tip tool holding portion and is not engaged with the tip tool holding portion. And a resilient member that urges the locking member from the disengaged position toward the engaged position.
  • the lock member is pressed by the cover to resist the biasing force of the elastic member from the engagement position toward the non-engagement position. You may move.
  • the lock member when the cover is removed from the housing, the lock member is urged by the elastic member to move to the engagement position and lock the tip tool holding portion.
  • the lock member when the cover is attached to the housing, the lock member is pressed by the cover and moved to the non-engagement position to unlock the tip tool holding portion.
  • the tip tool holding portion can be locked when the cover is removed from the housing, and the tip tool holding portion can be unlocked when the cover is attached to the housing.
  • the tip tool holder may be rotatable about a rotation axis with respect to the housing.
  • the cover may be detachable by sliding along the rotation axis with respect to the housing.
  • the lock member may be movable along the rotation axis with respect to the housing.
  • the tip tool holding portion can be locked when the cover is removed from the housing, and the tip tool holding portion can be unlocked when the cover is attached to the housing with a very simple configuration.
  • the tip tool holding portion may include a flange portion.
  • the lock member may contact the flange portion at the engagement position.
  • the lock member biased from the non-engagement position toward the engagement position by the elastic member can be prevented from moving beyond the engagement position. It is possible to prevent the lock member from falling off the housing.
  • the tip tool holding portion may include a protrusion.
  • the lock member may include a fitting hole into which the protrusion is fitted. In the electric power tool, when the lock member is in the engagement position, rotation of the tip tool holding portion around the rotation axis may be prohibited by the projection portion entering the fitting hole. In the electric power tool, when the lock member is in the non-engagement position, the protrusion of the protrusion may come out of the fitting hole to allow the tip tool holding portion to rotate around the rotation axis. .
  • the housing may include a substantially cylindrical cover attachment.
  • the cover may include a substantially cylindrical band portion attached to the outside of the cover attaching portion.
  • the lock member may include a contact piece disposed outside the cover attachment portion. In the electric tool, when the cover is attached to the housing, the abutting piece abuts against an end surface of the band portion, so that the lock member may be pressed by the cover.
  • the lock member can be moved from the engagement position to the non-engagement position in conjunction with the operation of the user attaching the cover to the housing with a simple configuration.
  • the tip tool holder may be a spindle.
  • the spindle rotation is switched to the spindle rotation unlocked state in conjunction with the attachment / detachment of the cover that covers at least a part of the spindle. Can do.
  • the grinder 2 of this embodiment includes a motor housing 4, a rear housing 6, a gear housing 8, a bearing box 10, and a wheel cover 12.
  • the motor 14 is accommodated in the motor housing 4.
  • the motor 14 has an output shaft 16 that extends in the front-rear direction.
  • the output shaft 16 is rotatably supported by the motor housing 4 via bearings 18 and 20.
  • the rear housing 6 is attached to the rear of the motor housing 4.
  • a power circuit 22 is accommodated in the rear housing 6. Power is supplied to the power supply circuit 22 from an external power supply via a power cord 24.
  • a switch lever 26 is provided on the lower surface of the motor housing 4. When the user pushes the switch lever 26 upward, the link 28 comes into contact with the drive switch 30 and power is supplied to the motor 14. The motor 14 rotates the output shaft 16 with the electric power supplied from the power supply circuit 22. When the user releases his hand from the switch lever 26, the link 28 is separated from the drive switch 30, and the supply of power to the motor 14 is stopped.
  • the switch lever 26 is provided with a lock-off lever 32 that switches between a state in which the pushing operation of the switch lever 26 is permitted and a state in which the switch lever 26 is prohibited.
  • the gear housing 8 is attached in front of the motor housing 4.
  • a first bevel gear 34 and a second bevel gear 36 arranged so as to mesh with each other are accommodated in the gear housing 8.
  • the first bevel gear 34 is fixed to the front end portion of the output shaft 16.
  • the second bevel gear 36 is fixed to the upper end of a spindle 38 that extends in the vertical direction.
  • the bevel gear 40 is a power transmission mechanism that decelerates the rotation of the motor 14 and transmits it to the spindle 38.
  • the gear housing 8 holds the upper end portion of the spindle 38 via the bearing 42.
  • a shaft lock 44 is provided on the upper surface of the gear housing 8. When the user pushes the shaft lock 44 downward, the rotation of the second bevel gear 36 is prohibited and the rotation of the spindle 38 is prohibited.
  • the bearing box 10 is attached below the gear housing 8.
  • the bearing box 10 is fixed to the gear housing 8 by screws 46 a, 46 b, 46 c, 46 d (see FIGS. 2, 5, etc.) extending in the vertical direction.
  • the bearing box 10 holds the spindle 38 via the bearing 48.
  • the spindle 38 can rotate around a rotation axis along the vertical direction with respect to the bearing box 10.
  • a grinding wheel GW can be attached to the lower end portion of the spindle 38 via an inner flange IF and an outer flange OF. In the grinder 2, when the motor 14 rotates, the grinding wheel GW rotates around the rotation axis together with the spindle 38, whereby the workpiece can be ground.
  • the spindle 38 can also be referred to as a tip tool holding portion that holds a grinding wheel GW that is a tip tool.
  • the motor housing 4, the rear housing 6, the gear housing 8, and the bearing box 10 are collectively referred to simply as a housing 50.
  • the wheel cover 12 is attached to the bearing box 10.
  • the wheel cover 12 is formed in a shape that covers at least a part of the grinding wheel GW.
  • the wheel cover 12 is formed in a shape that covers a portion of the grinding wheel GW that extends over a substantially half circumference. In the state shown in FIG. 1, the wheel cover 12 is disposed at a position covering the rear portion of the grinding wheel GW.
  • the wheel cover 12 can prevent the grinding powder from flying from the grinding wheel GW toward the user when the grinder 2 is used. It can also be said that the wheel cover 12 covers at least a part of the spindle 38.
  • the wheel cover 12 includes a band portion 52, an upper surface portion 54, and a side surface portion 56.
  • the band part 52 has a substantially cylindrical shape extending in the vertical direction.
  • engagement ribs 52 a, 52 b, 52 c, 52 d, and 52 e that protrude inward and have a longitudinal direction in the circumferential direction are formed on the inner peripheral surface of the band portion 52.
  • the band portion 52 has a plurality of through-holes 52f within a predetermined angle range.
  • the engaging ribs 52a, 52b, 52c, 52d, and 52e have the same vertical position.
  • the plurality of through holes 52f have the same vertical position.
  • the upper surface portion 54 extends from the lower end portion of the band portion 52 and has a truncated cone shape with a part cut away.
  • the side surface portion 56 includes a substantially semi-cylindrical semi-cylindrical portion 56a extending downward from the outer end portion of the upper surface portion 54, and a throttle portion 56b bent inward from the lower end of the semi-cylindrical portion 56a.
  • the bearing box 10 is formed with a substantially cylindrical cover mounting portion 58 that protrudes downward along the rotation axis direction of the spindle 38 (that is, the vertical direction).
  • a compression spring 60, a lock plate 62, and an O-ring 64 are attached to the cover attachment portion 58.
  • annular circumferential guide groove 66 is formed on the outer peripheral surface of the cover mounting portion 58 of the bearing box 10, and outward on the lower end side of the circumferential guide groove 66.
  • a protruding flange 68 is formed in the flange 68.
  • notches 68a, 68b, 68c, 68d, 68e are formed corresponding to the engaging ribs 52a, 52b, 52c, 52d, 52e of the wheel cover 12.
  • vertical guide grooves 70a, 70b, 70c, 70d, and 70e extending linearly in the vertical direction are formed corresponding to the notches 68a, 68b, 68c, 68d, and 68e. ing.
  • the vertical guide grooves 70 a, 70 b, 70 c, 70 d, and 70 e are formed deeper than the circumferential guide groove 66.
  • a spring receiving portion 72 for receiving the compression spring 60 is formed in a portion of the cover attaching portion 58 on the inner peripheral side with respect to the flange 68.
  • the lock plate 62 includes a base portion 62a having a dish shape, a fitting hole 62b formed in the center of the base portion 62a, and vertical guide grooves 70a, 70b, 70c of the cover attaching portion 58. , 70d, and 70e, contact pieces 62c, 62d, 62e, 62f, and 62g that are bent from the outer end of the base 62a and extend upward. Each contact piece 62c, 62d, 62e, 62f, 62g is bent outward at the upper end. As shown in FIG.
  • the lock plate 62 has the contact pieces 62 c, 62 d, 62 e, 62 f, and 62 g above and below the cover attaching portion 58 in a state where the compression spring 60 is attached to the spring receiving portion 72 of the cover attaching portion 58. It is attached to the cover attachment portion 58 so as to enter the direction guide grooves 70a, 70b, 70c, 70d, 70e. In a state where the lock plate 62 is attached to the cover attachment portion 58, the lock plate 62 can slide up and down with respect to the cover attachment portion 58, and cannot rotate with respect to the cover attachment portion 58.
  • the base portion 62 a of the lock plate 62 receives a biasing force from the compression spring 60, and the lock plate 62 is biased downward with respect to the cover mounting portion 58.
  • the portions other than the upper end portions of the contact pieces 62c, 62d, 62e, 62f, and 62g of the lock plate 62 are circumferential guide grooves of the cover attachment portion 58 in a state where the lock plate 62 is attached to the cover attachment portion 58. It is formed so as to have a shape with no level difference from the surface of 66.
  • the spindle 38 is attached to the bearing box 10 by being inserted from below into the bearing box 10 to which the compression spring 60 and the lock plate 62 are attached. As shown in FIG. 8, the spindle 38 is formed on the outer peripheral surface of the lower end portion, and is formed above the screw portion 38a and the screw portion 38a to which the outer flange OF (see FIG. 1) is screwed.
  • the upper protrusion 38d is formed in the upper portion of the lock plate 62 and fits into the fitting hole 62b of the lock plate 62.
  • the O-ring 64 is attached to the outside of the cover attachment portion 58 to which the compression spring 60 and the lock plate 62 are attached.
  • the O-ring 64 prevents the wheel cover 12 from rattling with respect to the cover attachment portion 58 when the wheel cover 12 is attached to the cover attachment portion 58.
  • a cover lock mechanism 74 for fixing the rotation angle of the wheel cover 12 is attached to the bearing box 10.
  • the cover lock mechanism 74 includes a slide plate 76 and a compression spring 78.
  • the slide plate 76 has a flat base 76a extending in the left-right direction in a shape that does not interfere with the gear housing 8 and the bearing box 10, and an operation portion 76b extending upward from the left end of the base 76a.
  • the slide plate 76 includes a screw 46 c disposed on the rear left side of the screws 46 a, 46 b, 46 c and 46 d for fixing the bearing box 10 to the gear housing 8, and a rear right side. It is attached to the arranged screw 46d.
  • the screw 46 c passes through the long hole 76 c of the slide plate 76 and fastens the bearing box 10 and the gear housing 8.
  • the screw 46 d passes through the long hole 76 d of the slide plate 76 and fastens the bearing box 10 and the gear housing 8.
  • the slide plate 76 is held by screws 46c and 46d so as to be slidable in the left-right direction.
  • a spring receiving portion 10a is formed in the bearing box 10.
  • the compression spring 78 is attached to the slide plate 76 with the first convex portion 76h inserted at one end and the second convex portion 76i inserted at the other end.
  • the slide plate 76 is attached to the bearing box 10 so that the end of the compression spring 78 on the second convex portion 76i side abuts on the spring receiving portion 10a. For this reason, the compression spring 78 biases the slide plate 76 leftward with respect to the bearing box 10, that is, the direction in which the locking portion 76 e approaches the cover attachment portion 58.
  • the position of the wheel cover 12 after being attached to the bearing box 10 in a state where the engagement ribs 52a, 52b, 52c, 52d, and 52e are aligned with the notches 58a, 58b, 58c, 58d, and 58e will be described below. It is also called the attachment / detachment position.
  • the attachment / detachment position As shown in FIG. 13, when the wheel cover 12 is attached to the cover attachment portion 58, the upper end surface of the band portion 52 of the wheel cover 12 is brought into contact with the contact pieces 62c, 62d, 62e, 62f, 62g of the lock plate 62. Abuts the upper end. Therefore, when the wheel cover 12 is attached to the cover attachment portion 58, the lock plate 62 is pressed from the wheel cover 12 and pushed upward against the urging force of the compression spring 60.
  • the wheel cover 12 attached to the bearing box 10 can rotate around the cover attachment portion 58.
  • the wheel cover 12 can rotate about the rotation axis direction (that is, the vertical direction) of the spindle 38 with respect to the bearing box 10.
  • the engagement ribs 52a, 52b, 52c, 52d, 52e slide in the circumferential guide groove 66, and the flange 68 and the engagement rib 52a,
  • 52b, 52c, 52d, and 52e are engaged, sliding of the wheel cover 12 in the downward direction with respect to the bearing box 10 is prohibited.
  • the wheel cover 12 cannot be removed from the bearing box 10.
  • the lock plate 62 is maintained in a state where it is pushed upward by the wheel cover 12.
  • the wheel cover 12 is rotated with respect to the bearing box 10 so that the locking portion 76e of the cover lock mechanism 74 is aligned with one of the plurality of through holes 52f of the band portion 52, and the cover lock mechanism 74 is operated.
  • the locking portion 76e enters the through hole 52f by the urging force of the compression spring 78.
  • the wheel cover 12 is engaged with the slide plate 76, the rotation of the wheel cover 12 relative to the bearing box 10 is prohibited, and the wheel cover 12 is fixed to the bearing box 10.
  • the user pushes the operation portion 76b of the cover lock mechanism 74 to bring the locking portion 76e out of the through hole 52f.
  • the cover 12 can be rotated relative to the bearing box 10.
  • a rotation angle for fixing the wheel cover 12 to the bearing box 10 can be selected by appropriately selecting the through hole 52f into which the locking portion 76e enters.
  • the grinder 2 of the present embodiment can be configured such that the compression spring 60 and the lock plate 62 are not attached. In this case, the rotation of the spindle 38 relative to the bearing box 10 is allowed regardless of whether or not the wheel cover 12 is attached to the cover attachment portion 58.
  • a wheel cover 80 as shown in FIG. 16 may be used instead of the wheel cover 12.
  • the wheel cover 80 includes a band portion 82, a cover portion 84, and an adjustment bolt 86.
  • the band portion 82 is a curved portion 82a obtained by bending a belt-like flat plate into a cylindrical shape, and is bent outward from both ends of the curved portion 82a and extends substantially in parallel with each other, and each has a pair of flat plates each having a through hole in the center.
  • the parts 82b and 82c and the nut 82d welded to the outer surface of the flat plate part 82c are provided.
  • the adjustment bolt 86 passes through the pair of flat plate portions 82b and 82c and is screwed to the nut 82d.
  • the cover portion 84 includes an inner cylindrical portion 84a, a truncated cone portion 84b, an outer cylindrical portion 84c, and a throttle portion 84d.
  • the inner cylindrical portion 84a and the outer cylindrical portion 84c are formed in a semicylindrical shape having a substantially semicircular cross section.
  • the truncated cone part 84b is formed in a truncated cone shape that connects the lower end of the inner cylindrical part 84a and the upper end of the outer cylindrical part 84c.
  • the throttle portion 84d is bent inward from the lower end of the outer cylindrical portion 84c.
  • the band portion 82 and the cover portion 84 are fixed to each other by welding the outer surface of the inner cylindrical portion 84a and the inner surface of the curved portion 82a.
  • engagement ribs 88a, 88b, 88c, 88d which protrude inward on the inner peripheral surface of the curved portion 82a and the inner peripheral surface of the inner cylindrical portion 84a and have a longitudinal direction in the circumferential direction, 88e is formed.
  • the adjustment bolt 86 is tightened, the curved portion 82a and the inner cylindrical portion 84a are pressed against the cover attaching portion 58, and the rotation of the wheel cover 80 relative to the bearing box 10 is prohibited.
  • the grinder 2 (an example of an electric tool) includes the motor 14, the bevel gear 40 (an example of a power transmission mechanism) connected to the motor 14, the motor 14 and the bevel gear. 40, a spindle 50 (an example of a tip tool holding portion) connected to the bevel gear 40, and wheel covers 12 and 80 (an example of a cover) that cover at least a part of the spindle 38.
  • the spindle 38 is locked.
  • the spindle 38 is unlocked.
  • the grinder 2 cannot be used because the spindle 38 is locked when the wheel covers 12, 80 are removed from the housing 50. When the wheel covers 12 and 80 are removed, the grinder 2 can be disabled.
  • the grinder 2 is attached to the housing 50 and is a lock that is movable between an engaged position that engages the spindle 38 and a non-engaged position that does not engage the spindle 38. It further includes a plate 62 (an example of a lock member) and a compression spring 60 (an example of an elastic member) that urges the lock plate 62 from the non-engagement position toward the engagement position.
  • the lock plate 62 is pressed by the wheel covers 12, 80, thereby disengaging from the engagement position against the urging force of the compression spring 60. Move towards position.
  • the lock plate 62 is urged by the compression spring 60 and moves to the engagement position to lock the spindle 38.
  • the lock plate 62 is pressed by the wheel covers 12 and 80 to move to the non-engagement position, and the spindle 38 is unlocked.
  • the spindle 38 is locked when the wheel covers 12 and 80 are removed from the housing 50 and the spindle 38 is unlocked when the wheel covers 12 and 80 are attached to the housing 50 with a simple configuration. Can do.
  • the spindle 38 is rotatable about the axis of rotation with respect to the housing 50.
  • the wheel covers 12 and 80 can be attached and detached by sliding them along the rotation axis of the spindle 38 with respect to the housing 50.
  • the lock plate 62 is movable along the rotation axis of the spindle 38 with respect to the housing 50.
  • the spindle 38 is locked when the wheel covers 12 and 80 are removed from the housing 50 and the spindle 38 is unlocked when the wheel covers 12 and 80 are attached to the housing 50 by a very simple configuration. can do.
  • the spindle 38 includes a flange portion 38c.
  • the lock plate 62 contacts the flange portion 38c at the engagement position.
  • the lock plate 62 biased from the non-engaged position toward the engaged position by the compression spring 60 can be prevented from moving beyond the engaged position. It is possible to prevent the lock plate 62 from falling off the housing 50.
  • the spindle 38 includes an upper protrusion 38d (an example of a protrusion).
  • the lock plate 62 includes a fitting hole 62b into which the upper protrusion 38d is fitted.
  • the upper protrusion 38 d enters the fitting hole 62 b, thereby prohibiting rotation of the spindle 38 around the rotation axis.
  • the upper protrusion 38d comes out of the fitting hole 62b, so that rotation around the rotation axis of the spindle 38 is allowed.
  • the state in which the rotation of the spindle 38 is locked and the state in which the rotation lock of the spindle 38 is released can be switched with a simple configuration.
  • the housing 50 includes a substantially cylindrical cover attachment portion 58.
  • the wheel covers 12, 80 include substantially cylindrical band portions 52, 82 attached to the outside of the cover attachment portion 58.
  • the lock plate 62 includes contact pieces 62c, 62d, 62e, 62f, and 62g disposed outside the cover attachment portion 58.
  • the contact pieces 62 c, 62 d, 62 e, 62 f, 62 g contact the end surfaces of the band portions 52, 82, so that the lock plate 62 is , 80.
  • the lock plate 62 can be moved from the engagement position to the non-engagement position in conjunction with the operation of attaching the wheel covers 12 and 80 to the housing 50 by a simple configuration.
  • the tip tool holder of the grinder 2 is a spindle 38.
  • the rotation of the spindle 38 is locked in conjunction with the attachment and detachment of the wheel covers 12 and 80 that cover at least a part of the spindle 38.
  • the unlocked state can be switched.
  • the electric tool is the grinder 2
  • the power transmission mechanism is the bevel gear 40
  • the tip tool holding portion is the spindle 38
  • the tip tool is the grinding wheel GW
  • the covers are the wheel covers 12, 80.
  • the power tool may be another type of power tool
  • the power transmission mechanism may be another type of speed reduction mechanism
  • the tip tool holding portion may be another type.
  • the kind of tip tool holding part may be used
  • the tip tool may be another kind of tip tool
  • the cover may be another kind of cover.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Portable Power Tools In General (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

La présente invention concerne un outil électrique. L'outil électrique peut comprendre un moteur, un mécanisme de transmission de puissance qui est raccordé au moteur, un logement qui contient le moteur et le mécanisme de transmission de puissance, une section de maintien d'outil d'extrémité avant qui est raccordée au mécanisme de transmission de puissance, et un couvercle qui recouvre au moins une partie de la section de maintien d'outil d'extrémité avant. Dans un état dans lequel le couvercle n'est pas fixé au logement, la section de maintien d'outil d'extrémité avant peut être verrouillée. Dans un état dans lequel le couvercle est fixé au logement, la section de maintien d'outil d'extrémité avant peut être déverrouillée.
PCT/JP2018/047913 2018-03-07 2018-12-26 Outil électrique Ceased WO2019171721A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-041178 2018-03-07
JP2018041178A JP2019155486A (ja) 2018-03-07 2018-03-07 電動工具

Publications (1)

Publication Number Publication Date
WO2019171721A1 true WO2019171721A1 (fr) 2019-09-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/047913 Ceased WO2019171721A1 (fr) 2018-03-07 2018-12-26 Outil électrique

Country Status (2)

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JP (1) JP2019155486A (fr)
WO (1) WO2019171721A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2598736A (en) * 2020-09-09 2022-03-16 Black & Decker Inc Side handle presence and gripping detection in a power tool
US20230055261A1 (en) * 2020-01-24 2023-02-23 Koki Holdings Co., Ltd. Work machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0111411Y2 (fr) * 1981-02-27 1989-04-03
JPH0445302B2 (fr) * 1983-06-17 1992-07-24 Black & Decker Inc
JP2005028516A (ja) * 2003-07-04 2005-02-03 Fuji Kuki Kk グラインダ
US20120052779A1 (en) * 2010-09-01 2012-03-01 Arne Timcke Grinding Device
WO2015029659A1 (fr) * 2013-08-27 2015-03-05 日立工機株式会社 Broyeur
WO2017092947A1 (fr) * 2015-12-02 2017-06-08 Robert Bosch Gmbh Machine-outil à main comportant au moins un élément de contact côté machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0111411Y2 (fr) * 1981-02-27 1989-04-03
JPH0445302B2 (fr) * 1983-06-17 1992-07-24 Black & Decker Inc
JP2005028516A (ja) * 2003-07-04 2005-02-03 Fuji Kuki Kk グラインダ
US20120052779A1 (en) * 2010-09-01 2012-03-01 Arne Timcke Grinding Device
WO2015029659A1 (fr) * 2013-08-27 2015-03-05 日立工機株式会社 Broyeur
WO2017092947A1 (fr) * 2015-12-02 2017-06-08 Robert Bosch Gmbh Machine-outil à main comportant au moins un élément de contact côté machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230055261A1 (en) * 2020-01-24 2023-02-23 Koki Holdings Co., Ltd. Work machine
US12390900B2 (en) * 2020-01-24 2025-08-19 Koki Holdings Co., Ltd. Work machine
GB2598736A (en) * 2020-09-09 2022-03-16 Black & Decker Inc Side handle presence and gripping detection in a power tool

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