WO2013084655A1 - Power tool - Google Patents

Power tool Download PDF

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Publication number
WO2013084655A1
WO2013084655A1 PCT/JP2012/078951 JP2012078951W WO2013084655A1 WO 2013084655 A1 WO2013084655 A1 WO 2013084655A1 JP 2012078951 W JP2012078951 W JP 2012078951W WO 2013084655 A1 WO2013084655 A1 WO 2013084655A1
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WO
WIPO (PCT)
Prior art keywords
tool
region
axis direction
grip
rotor
Prior art date
Application number
PCT/JP2012/078951
Other languages
French (fr)
Japanese (ja)
Inventor
梅村　新吾
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 WO2013084655A1 publication Critical patent/WO2013084655A1/en

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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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the present invention relates to an electric tool that performs a predetermined machining operation on a workpiece by rotating a tip tool with a motor.
  • Japanese Patent Application No. 2011-267187 filed on December 6, 2011 is used as a reference for related applications, and the entire contents thereof are used as a reference by reference.
  • Japanese Patent Laid-Open No. 2006-150571 discloses an electric disc grinder that performs a grinding operation such as grinding / polishing of a workpiece by rotating a grindstone as a tip tool with a motor.
  • the disc grinder described in the publication employs a configuration in which a grindstone is driven using an outer rotor type motor in which a stator is disposed on the inner side and a rotor is disposed on the outer side.
  • the frame internally fixes the stator of the motor and rotatably supports the rotor via a bearing. Further, the frame has a grip for an operator to hold in an intersecting manner with respect to the rotation axis of the motor from the motor support region.
  • the disc grinder described in the above publication has a structure in which a grip is integrated or integrated with a frame. For this reason, the vibration caused by the driving of the grindstone generated during the machining operation or the vibration accompanying the machining of the workpiece is transmitted to the grip, and there is still room for improvement in terms of ease of use.
  • the present invention has been made in view of the above, and an object thereof is to provide an electric tool that contributes to improvement in usability of a grip held by an operator.
  • an electric tool that performs a predetermined machining operation on a workpiece by rotation of a tip tool.
  • the electric tool has a work area in which a motor having a rotor for rotationally driving the tip tool, and a tool rotating shaft for mounting the tip tool are arranged coaxially with the rotor of the motor. Have. Moreover, it has a grip area for an operator to hold. Furthermore, an elastic member is disposed between the work area and the grip area.
  • a “tip tool drive mechanism” is mainly composed of a motor and a tool rotating shaft, and the “working area” in the present invention is a concept including a “housing” for accommodating the “tip tool drive mechanism”. It is.
  • the “elastic member” in the present invention typically corresponds to rubber, but preferably includes a spring.
  • the grip area held by the operator is connected to the work area via an elastic member.
  • the elastic member does not block the vibration generated in the work area and transmitted from the work area to the grip area. To reduce. Thereby, the usability of the grip can be improved.
  • the rotor and the tool rotating shaft are united.
  • integrated is defined as a mode of rotating integrally, a mode in which a tool rotation shaft is press-fitted and directly connected to a rotor, and is connected via an intermediate member such as a coupling. Or an integrally formed embodiment.
  • the working area, in particular, the “housing” can be reduced in size and weight compared to the configuration in which the power transmission member is interposed in the middle. It becomes effective in.
  • the elastic member is configured to receive at least a compressive load in each of the two directions of the major axis direction of the tool rotation axis and the direction intersecting the major axis direction.
  • the elastic member elastically connects the two regions in a state where it receives a compressive load in each of the two directions of the major axis direction of the tool rotation axis and the direction intersecting with the major axis direction.
  • the elastic member is compared with a configuration in which the two regions are elastically connected in a state of receiving a compressive load in one of the two directions and receiving only a shear load in the other direction.
  • the rigidity in the direction of the long axis of the tool rotation axis and the rigidity in the direction crossing the long axis direction of the tool rotation axis can be set to the same level. The operability can be improved.
  • the elastic member has a first region that receives a compressive load in the major axis direction of the tool rotating shaft and a second region that receives a compressive load in a direction intersecting the major axis direction of the tool rotating shaft.
  • the first region and the second region are integrally formed with each other.
  • “integrally formed” means an aspect in which the first region and the second region are integrally molded, and the first region and the second region are separately molded and then integrated. Is also included.
  • the number of elastic members is reduced compared to the case where the first region and the second region are configured separately, and the handling of the first region and the second region is reduced. Simplification can be achieved.
  • the tool rotating shaft can be attached with a tip tool on one end side in the long axis direction.
  • the grip area is defined by an axial area formed on the opposite side of the tip tool with respect to the work area in the major axis direction of the tool rotation axis, and a work area in a direction intersecting the major axis direction of the tool rotation axis. It has a radial region formed on the outside. The elastic member is disposed in an intervening manner between the axial region and the working region and between the radial region and the working region.
  • the work area and the grip area can be elastically connected by the elastic member in a state in which a compressive load is received in each of the two directions of the long axis direction of the tool rotation axis and the direction intersecting the long axis direction.
  • the work area is attached to a predetermined portion of the grip area in a fitting manner
  • the elastic member is at least one of the work areas in the fitting portion between the work area and the grip area. It arrange
  • the work area, the grip area, and the elastic member have a fitting structure in which the work area, the grip area, and the elastic member are fitted to each other.
  • the motor is an outer rotor type motor having a stator and a rotor arranged outside the stator.
  • the outer rotor type motor in which the outer rotor rotates is used, the outer diameter of the rotating portion of the motor can be increased, and the motor can have a large rotor inertia moment. .
  • a big torque can be generate
  • the grip region is formed in a long shape, and is arranged so that the long direction intersects the long axis direction of the tool rotation axis. According to this aspect, there is provided an angle type electric tool in which the tool rotation axis and the grip region intersect each other.
  • an electric tool that contributes to improving the usability of a grip held by an operator is provided.
  • FIG. 1 is a partially cut side view showing an overall configuration of an electric disc grinder according to an embodiment of the present invention. It is an enlarged view of the drive mechanism part of an electric disc grinder.
  • FIG. 2 is a sectional view taken along line AA in FIG. 1.
  • the electric disc grinder 101 (hereinafter, referred to as a disc grinder) generally includes an outer shell of the disc grinder 101 and a main body housing 103 held by an operator.
  • the main body housing 103 is configured as a substantially cylindrical member extending in a long shape, and a substantially cylindrical gripping portion 103A in which an intermediate region in the long axis direction (extending direction) is gripped by fingers of an operator. Is set as The grip portion 103A is formed with a thickness that is easy for an operator to grip with one hand.
  • a disc-shaped grindstone 125 is attached to one end (tip region) in the long axis direction of the main body housing 103 via a spindle 121 and serves as a power source for the drive motor 111 at the other end in the long axis direction.
  • a rechargeable battery pack 110 incorporating a plurality of battery cells is detachably attached.
  • the main body housing 103 corresponds to the “grip region” in the present invention, and the drive motor 111 is an example of an implementation configuration corresponding to the “motor” in the present invention.
  • the spindle 121 corresponds to the “tool rotation axis” in the present invention, and the grindstone 125 is an example of an implementation configuration corresponding to the “tip tool” in the present invention.
  • the grindstone 125 side in the major axis direction of the main body housing 103 is defined as “front side” or “front side”, and the battery pack 110 side is defined as “rear side” or “rear side”. It prescribes as 1 is defined as “upper side” or “upper side”, and the lower side of the page is defined as “lower side” or “lower side”.
  • the main body housing 103 is divided along the long axis direction, and the divided left and right housing constituent members are joined to each other with screws or the like to constitute a substantially cylindrical member.
  • One end portion in the major axis direction of the main body housing 103 is set as a hollow hemispherical drive mechanism housing portion 103B that is open at the bottom, and an inner housing 105 is housed in the drive mechanism housing portion 103B.
  • a drive mechanism 113 for a grindstone 125 which is mainly composed of a drive motor 111 and a spindle 121 that is rotationally driven by the drive motor 111, is disposed. That is, the inner housing 105 constitutes an area for disposing the drive mechanism 113 of the grindstone 125, and is an example of an implementation configuration corresponding to the “working area” in the present invention.
  • the internal space of the main body housing 103 is used for routing electrical wiring (not shown for convenience) for supplying the power of the battery cell to the drive motor 111.
  • a trigger 104 as an operation member that can be pulled with fingers is provided on the grip portion 103 ⁇ / b> A of the main body housing 103.
  • the drive motor 111 is energized, and when the trigger 104 is released and returned to the initial position, the drive motor 111 is turned on. Configured to be stopped.
  • the drive motor 111 is configured as an outer rotor type motor in which a stator 115 is disposed on the inner side and a rotor 117 is disposed on the outer side.
  • the drive motor 11 is disposed in the inner housing 105 so that the major axis (rotating axis) direction of the rotor 117 is the vertical direction intersecting the major axis direction of the main body housing 103.
  • the stator 115 includes a drive coil 116 for driving the rotor 117 and has a hole in the center.
  • the stator 115 is made non-rotatable with respect to the inner housing 105 by fitting the hole into a cylindrical portion 105a that projects linearly downward from a substantially central portion of the wall surface of the upper wall of the inner housing 105.
  • the rotor 117 is formed as a substantially cup-shaped member having a magnet 118 attached to the inner peripheral surface.
  • the magnet 118 is opposed to the outer periphery of the stator 115.
  • a cylindrical boss portion 117a is formed on the bottom portion of the rotor 117 so as to protrude downward with a predetermined length.
  • the rotor 117 is fixed to the spindle 121 press-fitted into the cylindrical hole of the boss portion 117a. That is, the rotor 117 and the spindle 121 are arranged coaxially with each other and are directly connected. Thus, the spindle 121 is arranged substantially orthogonal to the major axis direction of the main body housing 103.
  • the angle-type disc grinder 101 is configured in which the rotational axis direction of the grindstone 125 is arranged to intersect the major axis direction of the main body housing 103.
  • a cooling fan 119 is fitted and fixed to the outside of the boss 117a of the rotor 117 below the rotor 117. The cooling fan 119 rotates integrally with the rotor 117 to generate an air flow that flows from the upper side to the lower side in the inner housing 105.
  • the cooling fan 119 mainly cools the drive motor 111 by this air flow.
  • the spindle 121 passes through the boss portion 117a of the rotor 117, and further passes through the cylindrical portion 105a of the inner housing 105 in a loose fit.
  • the spindle 121 extends upward, and an upper end portion of the spindle 121 is rotatably supported by the inner housing 105 via a bearing 131.
  • the spindle 121 is rotatably supported by the inner housing 105 via a bearing 133 below the cooling fan 119.
  • the spindle 121 is supported on both sides in the long axis direction by the upper and lower bearings 131 and 133.
  • a rotor 117 and a cooling fan 119 are disposed between the upper and lower bearings 131 and 133 of the spindle 121. For this reason, the rotation operation of the rotor 117 and the cooling fan 119 is stabilized.
  • the spindle 121 passes through the lower bearing 133 and extends further downward.
  • the spindle 121 protrudes from the lower surface of the inner housing 105 to the outside by a predetermined length, and the protruding end portion is set as a grindstone mounting portion 121 a for attaching the grindstone 125.
  • the grindstone 125 is detachably attached to the grindstone attachment portion 121a by a tool holder 127 including two inner and outer flange members 127a and 127b arranged to face each other, and is rotated integrally with the spindle 121.
  • a part of the inner housing 105 protrudes downward from the lower surface of the drive mechanism housing portion 103B of the main body housing 103, and a grindstone cover 129 is attached to the protruding portion.
  • the grindstone cover 129 covers the latter half of the grindstone 125, and prevents grinding powder and the like generated during the machining operation from being scattered backward.
  • the inner housing 105 accommodated in the drive mechanism accommodating portion 103B is formed in a substantially cylindrical shape by joining upper and lower housing constituent members 105A and 105B divided in two in the vertical direction (long axis direction of the spindle 121). It is configured as a cylindrical member.
  • two upper and lower vibration isolating rubbers 135 and 137 are disposed in an intervening manner.
  • the anti-vibration rubbers 135 and 137 block or reduce vibration transmitted from the inner housing 105 to the main body housing 103.
  • the anti-vibration rubbers 135 and 137 correspond to “elastic members” in the present invention.
  • the upper anti-vibration rubber 135 is formed in a substantially downward cup shape, and is fitted from above so as to cover the outside of the upper region of the inner housing 105 (upper housing constituent member 105A).
  • a plurality of lateral ribs 141 projecting in the radial direction are formed in the vertical direction (long axis direction) on the peripheral wall surface.
  • a plurality of longitudinal ribs 143 projecting downward in the long axis direction are formed on the upper wall surface of the inner wall surface of the drive mechanism housing portion 103B of the main body housing 103 in the radial direction.
  • the cap-shaped upper anti-vibration rubber 135 is sandwiched and fixed between the protruding end surfaces of the horizontal rib 141 and the vertical rib 143 and the outer wall surface (the peripheral wall surface and the upper wall surface) of the inner housing 105.
  • the lower region (lower housing component 105B) of the inner housing 105 is formed in a stepped cylindrical shape having a large diameter on the upper side and a small diameter on the lower side in the major axis direction.
  • the lower vibration-proof rubber 137 is formed in an annular shape.
  • the lower anti-vibration rubber 137 is fitted to the small-diameter portion of the lower housing component member 105 ⁇ / b> B, and a step 145 corresponding to the boundary surface between the small-diameter portion and the large-diameter portion, and the main body housing 103. It is sandwiched and fixed from above and below with an inwardly extending portion 147 formed at the lower portion of the drive mechanism housing portion 103B.
  • the inner housing 105 is attached to the drive mechanism housing portion 103 ⁇ / b> B of the main body housing 103 in a fitting manner with the upper and lower vibration isolating rubbers 135 and 137 interposed therebetween.
  • the drive mechanism housing portion 103B is an example of an implementation configuration corresponding to the “predetermined portion” in the present invention.
  • the upper wall portion including the vertical rib 143 that faces the upper wall portion of the inner housing 105 in the drive mechanism housing portion 103B corresponds to the “axial region” in the present invention and faces the peripheral wall portion of the inner housing 105.
  • the peripheral wall portion including the transverse rib 141 is an example of an implementation configuration corresponding to the “radial region” in the present invention.
  • the vertical rib 143 of the drive mechanism housing portion 103B and the inner housing 105 are input.
  • the lower circular ring sandwiched between the disc part 135a of the upper cup-shaped anti-vibration rubber 135 sandwiched by the upper wall surface, the step part 145 of the inner housing 105 and the overhanging part 147 of the drive mechanism housing part 103B.
  • One of the anti-vibration rubber 137 compresses and deforms to absorb or reduce the force in the long axis direction.
  • an upward force directed from the grindstone 125 toward the drive motor 111 is dealt with by compressing and deforming the disc portion 135a of the upper cup-shaped anti-vibration rubber 135.
  • the downward force toward the side is dealt with by compressing and deforming the lower annular vibration-proof rubber 137.
  • the disc portion 135a and the annular vibration-proof rubber 137 correspond to the “first region” in the present invention, and the body portion 135b is an example of an implementation configuration corresponding to the “second region” in the present invention.
  • the disc grinder 101 is configured as described above. Accordingly, if the gripping portion 103A of the main body housing 103 is gripped by hand, the trigger 104 attached to the gripping portion 103A is pulled and the drive motor 111 is energized to drive the grindstone together with the spindle 121 directly connected to the rotor 117. 125 is driven to rotate. For this reason, it is possible to perform processing operations such as grinding, polishing operation or cutting operation of the workpiece.
  • the inner housing 105 when vibration is generated in the drive mechanism 113 of the grindstone 125 due to driving of the grindstone 125 or grinding / polishing of the workpiece with the grindstone 125 during the machining operation, the inner housing 105 Then, the vibration of the drive mechanism 113 transmitted to the main body housing 103 side can be cut off or reduced by compressive deformation of the anti-vibration rubbers 135 and 137. Accordingly, it is possible to improve the usability of the gripping portion 103A when gripping the gripping portion 103A of the main body housing 103 and performing a processing operation.
  • the vibration isolating rubber receives a compressive load in one of the major axis direction and the radial direction, and receives a shear load in the other direction.
  • the vibration-proof rubber has a relationship that the shearing rigidity is lower than the compression rigidity, so that there is a problem that the gripping region is likely to wobble in the direction of receiving the shear load.
  • the main body housing 103 having the grip portion 103A and the inner housing 105 that houses the drive mechanism 113 of the grindstone 125 including the drive motor 111 are arranged in two directions, ie, the major axis direction and the radial direction of the spindle 121.
  • Each direction is elastically connected in such a way as to receive a compressive load by the anti-vibration rubbers 135 and 137.
  • the anti-vibration rubbers 135 and 137 it is possible to set the anti-vibration rubbers 135 and 137 so as to have the same degree of rigidity in each of the two directions of the major axis direction and the radial direction of the spindle 121.
  • the upper anti-vibration rubber 135 is formed in a downward cup shape with the lower part opened, and the drive mechanism housing portion 103B of the main body housing 103 and the inner housing 105 housing the drive mechanism 113 are formed. In the meantime, the upper anti-vibration rubber 135 is interposed in a fitting manner. Therefore, when the left and right housing constituent members of the main body housing 103 are joined and assembled so that the inner housing 105 is positioned in the drive mechanism housing portion 103B of the main body housing 103, a cup-shaped vibration-proof rubber 135 can be disposed in advance so as to cover the inner housing 105 from above. As a result, the assembly work of the main body housing 103 and the inner housing 105 can be easily performed.
  • the disc portion 135a that receives the compression load in the major axis direction of the spindle 121 and the body portion 135b that receives the compression load in the radial direction are integrally formed. can do. As a result, the number of parts is reduced and the handling is easy as compared with the case where the disc part 135a and the body part 135b are formed separately.
  • an outer rotor type motor in which the outer rotor 117 rotates is adopted as the drive motor 111.
  • the outer diameter of the rotating part of the drive motor 111 can be formed large, and the drive motor 111 can have a large rotor inertia moment.
  • the disc grinder 101 of the present embodiment can generate a larger torque than the disc grinder that employs the inner rotor type motor. Accordingly, it is possible to employ a configuration in which the spindle 121 is directly connected to the rotor 117.
  • the work area in particular, the inner housing 105 can be reduced in size and weight.
  • the grip portion 103A of the main body housing 103 can be designed to be easily gripped, so that operability can be improved.
  • the vibration isolating rubber 135, 137 is used as the elastic member.
  • the vibration isolating rubber 135, 137 may be changed to a spring.
  • the lower anti-vibration rubber 137 may be formed in a cup shape similar to the upper anti-vibration rubber 135.
  • the disc part 135a and the body part 135b may be formed separately for the upper cup-shaped vibration-proof rubber 135.
  • the main body housing 103 and the inner housing 105 may be elastically coupled so as to receive a compressive load in the circumferential direction of the spindle 121.
  • the main body housing 103 is an example of a configuration corresponding to the “grip region” of the present invention.
  • the drive motor 111 is an example of a configuration corresponding to the “motor” of the present invention.
  • the spindle 121 is an example of a configuration corresponding to the “tool rotation axis” of the present invention.
  • the grindstone 125 is an example of a configuration corresponding to the “tip tool” of the present invention.
  • the inner housing 105 is an example of a configuration corresponding to the “working area” of the present invention.
  • the anti-vibration rubbers 135 and 137 are an example of a configuration corresponding to the “elastic member” of the present invention.
  • the drive mechanism housing portion 103B is an example of a configuration corresponding to the “predetermined portion” of the present invention.
  • the upper wall portion including the vertical ribs 143 facing the upper wall portion of the inner housing 105 in the drive mechanism housing portion 103B is an example of a configuration corresponding to the “axial region” of the present invention.
  • the peripheral wall portion including the lateral rib 141 facing the peripheral wall portion of the inner housing 105 is an example of a configuration corresponding to the “radial region” of the present invention.
  • the disc part 135a is an example of a configuration corresponding to the “first region” of the present invention.
  • the annular vibration-proof rubber 137 is an example of a configuration corresponding to the “first region” of the present invention.
  • the body portion 135b is an example of a configuration corresponding to the “second region” of the present invention.
  • the working tool according to the present invention can be configured in the following manner.
  • (Aspect 1) A power tool that performs a predetermined processing operation on a workpiece by rotating the tip tool, A motor that has a rotor and a stator and that drives the tip tool to rotate, and is arranged coaxially with the rotation axis of the rotor and a tool rotation axis for mounting the tip tool.
  • Working area A grip area for the operator to hold, An elastic member disposed in an intervening manner between the work area and the grip area;
  • a power tool having " (Aspect 2) The power tool according to the first aspect, The power tool, wherein the rotor and the tool rotation shaft are integrated.
  • the elastic member elastically connects the work area and the grip area to each other in a mode that receives at least a compressive load in each of two directions of the major axis direction of the tool rotation axis and the direction intersecting the major axis direction.
  • An electric tool characterized by having " (Aspect 4) “The power tool according to the third aspect, The elastic member includes a first region that receives a compressive load in a major axis direction of the tool rotation axis, and a second region that receives a compressive load in a direction intersecting the major axis direction of the tool rotation axis, A power tool characterized in that the first region and the second region are formed integrally with each other.
  • the power tool according to the third aspect is the aspect which receives the compressive load about the circumferential direction of the said tool rotating shaft, The said working area
  • region are mutually elastically connected, The electric tool characterized by the above-mentioned.
  • the tool rotation shaft is capable of mounting the tip tool on one end side in the long axis direction, In the major axis direction of the tool rotation axis, the grip region is an axial region formed on the opposite side of the tip tool with respect to the work area, and in a direction intersecting the major axis direction of the tool rotation axis, Having a radial region formed outside the working region;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

[Problem] To provide a power tool that contributes to improvement in the usability of a grip held by an operator. [Solution] A power tool for performing predetermined machining work on a machining object by rotation of a distal end tool (125), the power tool comprising a work area (105) in which are disposed a motor (111) having a rotator (117) for rotatably driving the distal end tool (125), and a tool rotating shaft (121) coaxially disposed with the rotator (117) of the motor (111) and on which the distal end tool (125) is mounted. The power tool also has a grip area (103) for gripping by the operator. Elastic members (135, 137) are interposed between the work area (105) and the grip area (103).

Description

電動工具Electric tool
　本発明は、モータにより先端工具を回転させることにより、被加工材に所定の加工作業を遂行する電動工具に関する。 The present invention relates to an electric tool that performs a predetermined machining operation on a workpiece by rotating a tip tool with a motor.
　２０１１年１２月６日に出願された特願２０１１－２６７１８７号が、関連出願の参照とされ、その内容全体が参照による引用として用いられる。 Japanese Patent Application No. 2011-267187 filed on December 6, 2011 is used as a reference for related applications, and the entire contents thereof are used as a reference by reference.
　特開２００６－１５０５７１号公報は、先端工具としての砥石をモータで回転駆動させて、被加工材の研削・研磨等の加工作業を行う電動式のディスクグラインダを開示している。公報記載のディスクグラインダは、固定子が内側に配置され、回転子が外側に配置されたアウタロータ型モータを用いて砥石を駆動する構成を採用している。フレームは、内部において、モータの固定子を固定するとともに、軸受を介して回転子を回転自在に支持している。また、フレームは、モータ支持領域からモータの回転軸線に対して交差状に延在する作業者が把持するためのグリップを有する。 Japanese Patent Laid-Open No. 2006-150571 discloses an electric disc grinder that performs a grinding operation such as grinding / polishing of a workpiece by rotating a grindstone as a tip tool with a motor. The disc grinder described in the publication employs a configuration in which a grindstone is driven using an outer rotor type motor in which a stator is disposed on the inner side and a rotor is disposed on the outer side. The frame internally fixes the stator of the motor and rotatably supports the rotor via a bearing. Further, the frame has a grip for an operator to hold in an intersecting manner with respect to the rotation axis of the motor from the motor support region.
　上記公報に記載のディスクグラインダは、グリップがフレームに一体もしくは一体化された構成である。このため、加工作業時に発生する砥石の駆動による振動ないし被加工材の加工に伴う振動が、グリップに伝わることとなり、使い易さという点において、なお改良の余地がある。 The disc grinder described in the above publication has a structure in which a grip is integrated or integrated with a frame. For this reason, the vibration caused by the driving of the grindstone generated during the machining operation or the vibration accompanying the machining of the workpiece is transmitted to the grip, and there is still room for improvement in terms of ease of use.
　本発明は、上記に鑑みてなされたものであり、作業者が把持するグリップの使用性の向上に資する電動工具を、提供することをその目的とする。 The present invention has been made in view of the above, and an object thereof is to provide an electric tool that contributes to improvement in usability of a grip held by an operator.
　上記課題を達成するため、本発明の好ましい形態によれば、先端工具の回転により被加工材に所定の加工作業を行う電動工具が構成される。電動工具は、先端工具を回転駆動するための回転子を有するモータと、モータの回転子と同軸上に配置されるとともに、先端工具を取付けるための工具回転軸と、が配置された作業領域を有する。また、作業者が把持するためのグリップ領域を有する。更には、作業領域とグリップ領域との間に介在状に配置された弾性部材を有する。なお、モータ及び工具回転軸を主体として「先端工具の駆動機構」が構成され、本発明における「作業領域」とは、当該「先端工具の駆動機構」を収容するための「ハウジング」を含む概念である。また、本発明における「弾性部材」とは、典型的にはゴムがこれに該当するが、バネを好適に包含する。 In order to achieve the above object, according to a preferred embodiment of the present invention, an electric tool that performs a predetermined machining operation on a workpiece by rotation of a tip tool is configured. The electric tool has a work area in which a motor having a rotor for rotationally driving the tip tool, and a tool rotating shaft for mounting the tip tool are arranged coaxially with the rotor of the motor. Have. Moreover, it has a grip area for an operator to hold. Furthermore, an elastic member is disposed between the work area and the grip area. A “tip tool drive mechanism” is mainly composed of a motor and a tool rotating shaft, and the “working area” in the present invention is a concept including a “housing” for accommodating the “tip tool drive mechanism”. It is. The “elastic member” in the present invention typically corresponds to rubber, but preferably includes a spring.
　本発明の好ましい形態の電動工具では、作業者が把持するグリップ領域は、作業領域に対して弾性部材を介して接続される構成である。このため、モータにより先端工具を駆動して、被加工材に所定の加工作業を行う加工作業時において、作業領域で発生し、当該作業領域からグリップ領域へ伝達する振動を、弾性部材が遮断ないし低減する。これにより、グリップの使用性を向上することができる。 In the power tool according to a preferred embodiment of the present invention, the grip area held by the operator is connected to the work area via an elastic member. For this reason, when the tip tool is driven by the motor to perform a predetermined machining operation on the workpiece, the elastic member does not block the vibration generated in the work area and transmitted from the work area to the grip area. To reduce. Thereby, the usability of the grip can be improved.
　本発明の更なる形態の電動工具では、回転子と工具回転軸とは一体とされている。この形態における「一体とされている」とは、一体に回転する態様として規定され、回転子に工具回転軸が圧入嵌合されて直結された態様、カップリング等の中間部材を介して接続された態様、あるいは一体に形成する態様を包含する。
　この形態によれば、回転子と工具回転軸が一体とされていることで、中間に動力伝達部材を介在する構成に比べて、作業領域、特に「ハウジング」の小型化、軽量化を図る上で有効となる。 In the electric tool of the further form of this invention, the rotor and the tool rotating shaft are united. In this embodiment, “integrated” is defined as a mode of rotating integrally, a mode in which a tool rotation shaft is press-fitted and directly connected to a rotor, and is connected via an intermediate member such as a coupling. Or an integrally formed embodiment.
According to this embodiment, since the rotor and the tool rotation shaft are integrated, the working area, in particular, the “housing” can be reduced in size and weight compared to the configuration in which the power transmission member is interposed in the middle. It becomes effective in.
　本発明の更なる形態の電動工具では、弾性部材は、工具回転軸の長軸方向及び当該長軸方向と交差する方向の二方向それぞれについて、少なくとも圧縮荷重を受ける態様で作業領域とグリップ領域とを互いに弾性連結している。
　この形態によれば、弾性部材が、工具回転軸の長軸方向とそれに交差する方向との二方向それぞれについて、圧縮荷重を受ける状態で、上記両領域を弾性連結している。このため、例えば、弾性部材が、上記二方向のうち、一方向については圧縮荷重を受ける状態で、他方向については剪断荷重のみを受ける状態で、上記両領域を弾性連結するような構成に比べると、工具回転軸の長軸方向に関する剛性と工具回転軸の長軸方向に交差する方向に関する剛性とを、同程度に設定することが可能となり、グリップ領域を把持して電動工具を操作する際の操作性を、向上することができる。 In the electric tool according to a further aspect of the present invention, the elastic member is configured to receive at least a compressive load in each of the two directions of the major axis direction of the tool rotation axis and the direction intersecting the major axis direction. Are elastically connected to each other.
According to this aspect, the elastic member elastically connects the two regions in a state where it receives a compressive load in each of the two directions of the major axis direction of the tool rotation axis and the direction intersecting with the major axis direction. For this reason, for example, the elastic member is compared with a configuration in which the two regions are elastically connected in a state of receiving a compressive load in one of the two directions and receiving only a shear load in the other direction. And the rigidity in the direction of the long axis of the tool rotation axis and the rigidity in the direction crossing the long axis direction of the tool rotation axis can be set to the same level. The operability can be improved.
　本発明の更なる形態の電動工具では、弾性部材は、工具回転軸の長軸方向の圧縮荷重を受ける第１領域と、工具回転軸の長軸方向と交差する方向の圧縮荷重を受ける第２領域とを有し、第１領域と第２領域が互いに一体に形成されている。この形態における「一体に形成されている」とは、第１領域と第２領域とを、一体成形する態様の他、第１領域と第２領域とを別々に成形した後に、一体にする態様をも包含する。
　この形態によれば、第１領域と第２領域が互いに一体に形成されていることで、第１領域と第２領域が別々で構成される場合に比べ、弾性部材数が減少され、取り扱いの容易化を図ることができる。 In the electric tool according to a further aspect of the present invention, the elastic member has a first region that receives a compressive load in the major axis direction of the tool rotating shaft and a second region that receives a compressive load in a direction intersecting the major axis direction of the tool rotating shaft. The first region and the second region are integrally formed with each other. In this embodiment, “integrally formed” means an aspect in which the first region and the second region are integrally molded, and the first region and the second region are separately molded and then integrated. Is also included.
According to this aspect, since the first region and the second region are integrally formed with each other, the number of elastic members is reduced compared to the case where the first region and the second region are configured separately, and the handling of the first region and the second region is reduced. Simplification can be achieved.
　本発明の更なる形態の電動工具では、工具回転軸は、長軸方向の一端側において、先端工具の取付けが可能とされている。また、グリップ領域は、工具回転軸の長軸方向において、作業領域を基準として先端工具と反対側に形成された軸方向領域と、工具回転軸の長軸方向と交差する方向において、作業領域の外側に形成された径方向領域を有する。そして弾性部材は、軸方向領域と作業領域の間及び径方向領域と作業領域の間のそれぞれに、介在状に配置されている。
　この形態によれば、作業領域とグリップ領域とを、弾性部材によって工具回転軸の長軸方向と、それに交差する方向と、の二方向それぞれについて圧縮荷重を受ける状態で、弾性連結することができる。 In the electric tool according to a further aspect of the present invention, the tool rotating shaft can be attached with a tip tool on one end side in the long axis direction. In addition, the grip area is defined by an axial area formed on the opposite side of the tip tool with respect to the work area in the major axis direction of the tool rotation axis, and a work area in a direction intersecting the major axis direction of the tool rotation axis. It has a radial region formed on the outside. The elastic member is disposed in an intervening manner between the axial region and the working region and between the radial region and the working region.
According to this aspect, the work area and the grip area can be elastically connected by the elastic member in a state in which a compressive load is received in each of the two directions of the long axis direction of the tool rotation axis and the direction intersecting the long axis direction. .
　本発明の更なる形態の電動工具では、作業領域は、グリップ領域の所定の部分に嵌合状に取付けられ、弾性部材は、作業領域とグリップ領域との嵌合部において、作業領域の少なくとも一部を覆うように配置されている。
　この形態によれば、作業領域、グリップ領域及び弾性部材が、互いに嵌り合う嵌合構造とされることで、それらを組付ける場合の組付け性を向上することができる。 In the electric tool according to a further aspect of the present invention, the work area is attached to a predetermined portion of the grip area in a fitting manner, and the elastic member is at least one of the work areas in the fitting portion between the work area and the grip area. It arrange | positions so that a part may be covered.
According to this aspect, the work area, the grip area, and the elastic member have a fitting structure in which the work area, the grip area, and the elastic member are fitted to each other.
　本発明の更なる形態の電動工具では、モータは、固定子と、固定子の外側に配置された回転子と、を有するアウタロータ型モータである。
　この形態によれば、外側の回転子が回転するアウタロータ型モータとしたことで、モータの回転部分の外径を大きく形成することができ、モータに大きなロータ慣性モーメントを持たせることが可能となる。このため、当該形態の電動工具では、インナロータ型モータを採用した電動工具に比べて、大きなトルクを発生することができる。これにより、回転子に対して、工具回転軸を直結する構成を採用することが可能となり、作業領域、特に「ハウジング」の小型化、軽量化を実現する上で有効となる。 In the electric tool according to a further aspect of the present invention, the motor is an outer rotor type motor having a stator and a rotor arranged outside the stator.
According to this aspect, since the outer rotor type motor in which the outer rotor rotates is used, the outer diameter of the rotating portion of the motor can be increased, and the motor can have a large rotor inertia moment. . For this reason, in the electric tool of the said form, a big torque can be generate | occur | produced compared with the electric tool which employ | adopted the inner rotor type | mold motor. Accordingly, it is possible to adopt a configuration in which the tool rotation shaft is directly connected to the rotor, which is effective in realizing a reduction in size and weight of the work area, particularly the “housing”.
　本発明の更なる形態の電動工具では、グリップ領域は、長尺状に形成されるとともに、当該長尺方向が、工具回転軸の長軸方向と交差するように配置されている。
　この形態によれば、工具回転軸とグリップ領域が、互いに交差するアングルタイプの電動工具が提供される。 In the electric tool according to a further aspect of the present invention, the grip region is formed in a long shape, and is arranged so that the long direction intersects the long axis direction of the tool rotation axis.
According to this aspect, there is provided an angle type electric tool in which the tool rotation axis and the grip region intersect each other.
　本発明によれば、作業者が把持するグリップの使用性の向上に資する電動工具が提供されることとなった。 According to the present invention, an electric tool that contributes to improving the usability of a grip held by an operator is provided.
　本発明の他の特質、作用および効果については、本明細書、特許請求の範囲、添付図面を参照することで直ちに理解可能である。 Other characteristics, operations, and effects of the present invention can be readily understood with reference to the present specification, claims, and attached drawings.
本発明の実施の形態に係る電動ディスクグラインダの全体構成を示す一部切断側面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cut side view showing an overall configuration of an electric disc grinder according to an embodiment of the present invention. 電動ディスクグラインダの駆動機構部の拡大図である。It is an enlarged view of the drive mechanism part of an electric disc grinder. 図１のＡ－Ａ線断面図である。FIG. 2 is a sectional view taken along line AA in FIG. 1.
　以上および以下の記載に係る構成ないし方法は、本発明にかかる「電動工具」の製造および使用、当該「電動工具」の構成要素の使用を実現せしめるべく、他の構成ないし方法と別に、あるいはこれらと組み合わせて用いることができる。本発明の代表的実施形態は、これらの組み合わせも包含し、添付図面を参照しつつ詳細に説明される。以下の詳細な説明は、本発明の好ましい適用例を実施するための詳細情報を当業者に教示するに留まり、本発明の技術的範囲は、当該詳細な説明によって制限されず、特許請求の範囲の記載に基づいて定められる。このため、以下の詳細な説明における構成や方法ステップの組み合わせは、広義の意味において、本発明を実施するのに全て必須であるというものではなく、添付図面の参照番号とともに記載された詳細な説明において、本発明の代表的形態を開示するに留まるものである。 The configurations and methods according to the above and the following descriptions are separately or separately from other configurations and methods in order to realize the manufacture and use of the “power tool” according to the present invention and the use of the components of the “power tool”. Can be used in combination. Exemplary embodiments of the present invention include these combinations and will be described in detail with reference to the accompanying drawings. The following detailed description is only to teach those skilled in the art with detailed information to implement preferred embodiments of the invention, and the scope of the invention is not limited by the detailed description, but is limited by the scope of the claims. It is determined based on the description. For this reason, combinations of configurations and method steps in the following detailed description are not all essential to implement the present invention in a broad sense, but are described in detail with reference numerals in the accompanying drawings. However, only representative embodiments of the present invention are disclosed.
　以下、本発明の実施形態につき、図１～図３を参照しつつ詳細に説明する。本実施の形態は、電動工具の一例として充電式の電動ディスクグラインダを用いて説明する。電動ディスクグラインダ１０１（以下、ディスクグラインダという）は、概括的に見て、ディスクグラインダ１０１の外郭を形成するとともに、作業者が把持する本体ハウジング１０３を主体として構成される。本体ハウジング１０３は、長尺状に延在する略筒状部材として構成されており、長軸方向（延在方向）の中間領域が、作業者の手指により把持される略円筒形状の把持部１０３Ａとして設定されている。この把持部１０３Ａは、作業者が片手で把持し易い太さに形成されている。また、本体ハウジング１０３の長軸方向一端部（先端領域）には、円板状の砥石１２５が、スピンドル１２１を介して取付けられ、長軸方向他端部には、駆動モータ１１１の電源となる複数のバッテリセルを内蔵した充電式のバッテリパック１１０が、取外し自在に取付けられている。 Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. This embodiment will be described using a rechargeable electric disc grinder as an example of an electric tool. The electric disc grinder 101 (hereinafter, referred to as a disc grinder) generally includes an outer shell of the disc grinder 101 and a main body housing 103 held by an operator. The main body housing 103 is configured as a substantially cylindrical member extending in a long shape, and a substantially cylindrical gripping portion 103A in which an intermediate region in the long axis direction (extending direction) is gripped by fingers of an operator. Is set as The grip portion 103A is formed with a thickness that is easy for an operator to grip with one hand. A disc-shaped grindstone 125 is attached to one end (tip region) in the long axis direction of the main body housing 103 via a spindle 121 and serves as a power source for the drive motor 111 at the other end in the long axis direction. A rechargeable battery pack 110 incorporating a plurality of battery cells is detachably attached.
　本体ハウジング１０３は、本発明における「グリップ領域」に対応し、駆動モータ１１１は、本発明における「モータ」に対応する実施構成の一例である。また、スピンドル１２１は、本発明における「工具回転軸」に対応し、砥石１２５は、本発明における「先端工具」に対応する実施構成の一例である。なお、本実施の形態では、便宜上、本体ハウジング１０３の長軸方向における砥石１２５側を、「前側」ないし「前方側」として規定し、バッテリパック１１０側を、「後側」ないし「後方側」として規定する。また、図１中の紙面上方を、「上側」ないし「上方側」と規定し、紙面下方を、「下側」ないし「下方側」と規定する。 The main body housing 103 corresponds to the “grip region” in the present invention, and the drive motor 111 is an example of an implementation configuration corresponding to the “motor” in the present invention. The spindle 121 corresponds to the “tool rotation axis” in the present invention, and the grindstone 125 is an example of an implementation configuration corresponding to the “tip tool” in the present invention. In the present embodiment, for the sake of convenience, the grindstone 125 side in the major axis direction of the main body housing 103 is defined as “front side” or “front side”, and the battery pack 110 side is defined as “rear side” or “rear side”. It prescribes as 1 is defined as “upper side” or “upper side”, and the lower side of the page is defined as “lower side” or “lower side”.
　また、本体ハウジング１０３は、長軸方向に沿って分割されるとともに、当該分割された左右のハウジング構成部材が、ネジ等で互いに接合されることにより、略筒状部材を構成する。本体ハウジング１０３の長軸方向一端部は、下方が開放された中空の中空半球状の駆動機構収容部１０３Ｂとして設定され、当該駆動機構収容部１０３Ｂ内には、インナハウジング１０５が収容されている。そして、インナハウジング１０５内には、駆動モータ１１１と、当該駆動モータ１１１によって回転駆動されるスピンドル１２１と、を主体として構成される砥石１２５の駆動機構１１３が配置されている。すなわち、インナハウジング１０５は、砥石１２５の駆動機構１１３を配置するための領域を構成しており、本発明における「作業領域」に対応する実施構成の一例である。 The main body housing 103 is divided along the long axis direction, and the divided left and right housing constituent members are joined to each other with screws or the like to constitute a substantially cylindrical member. One end portion in the major axis direction of the main body housing 103 is set as a hollow hemispherical drive mechanism housing portion 103B that is open at the bottom, and an inner housing 105 is housed in the drive mechanism housing portion 103B. In the inner housing 105, a drive mechanism 113 for a grindstone 125, which is mainly composed of a drive motor 111 and a spindle 121 that is rotationally driven by the drive motor 111, is disposed. That is, the inner housing 105 constitutes an area for disposing the drive mechanism 113 of the grindstone 125, and is an example of an implementation configuration corresponding to the “working area” in the present invention.
　なお、本体ハウジング１０３の内部空間、特に把持部１０３Ａの内部空間は、バッテリセルの電力を、駆動モータ１１１に供給するための電気配線（便宜上、図示を省略する）の取り回しに用いられる。また、本体ハウジング１０３の把持部１０３Ａには、手指で引き操作可能な操作部材としてのトリガ１０４が設けられている。本実施形態のディスクグラインダ１０１は、当該トリガ１０４が引き操作されたときに、駆動モータ１１１が通電駆動され、トリガ１０４の引き操作が解除されて初期位置に戻されたときに、駆動モータ１１１が停止されるように構成されている。 Note that the internal space of the main body housing 103, particularly the internal space of the grip portion 103A, is used for routing electrical wiring (not shown for convenience) for supplying the power of the battery cell to the drive motor 111. In addition, a trigger 104 as an operation member that can be pulled with fingers is provided on the grip portion 103 </ b> A of the main body housing 103. In the disc grinder 101 of this embodiment, when the trigger 104 is pulled, the drive motor 111 is energized, and when the trigger 104 is released and returned to the initial position, the drive motor 111 is turned on. Configured to be stopped.
　図２、図３に示すように、駆動モータ１１１は、内側に固定子１１５が配置され、外側に回転子１１７が配置されたアウタロータ型モータとして構成されている。駆動モータ１１は、回転子１１７の長軸（回転軸）方向が、本体ハウジング１０３の長軸方向と交差する上下方向となるように、インナハウジング１０５内に配置されている。固定子１１５は、回転子１１７を駆動するための駆動コイル１１６を備えるとともに、中央に孔を有する。固定子１１５は、インナハウジング１０５の上壁の壁面略中央部から下方へと直線状に突出された円筒部１０５ａに、当該孔を嵌合することによって、インナハウジング１０５に対して、回転不能に嵌合されている。回転子１１７は、内周面に磁石１１８が取付けられた略カップ状部材として形成されている。磁石１１８は、固定子１１５の外周と対向している。また、回転子１１７の底部には、下方へと所定長さで突出する筒状のボス部１１７ａが形成されている。 2 and 3, the drive motor 111 is configured as an outer rotor type motor in which a stator 115 is disposed on the inner side and a rotor 117 is disposed on the outer side. The drive motor 11 is disposed in the inner housing 105 so that the major axis (rotating axis) direction of the rotor 117 is the vertical direction intersecting the major axis direction of the main body housing 103. The stator 115 includes a drive coil 116 for driving the rotor 117 and has a hole in the center. The stator 115 is made non-rotatable with respect to the inner housing 105 by fitting the hole into a cylindrical portion 105a that projects linearly downward from a substantially central portion of the wall surface of the upper wall of the inner housing 105. It is mated. The rotor 117 is formed as a substantially cup-shaped member having a magnet 118 attached to the inner peripheral surface. The magnet 118 is opposed to the outer periphery of the stator 115. Further, a cylindrical boss portion 117a is formed on the bottom portion of the rotor 117 so as to protrude downward with a predetermined length.
　回転子１１７は、ボス部１１７ａの筒孔に圧入されたスピンドル１２１に固定されている。すなわち、回転子１１７とスピンドル１２１とは、互いに同軸上に配置され、かつ直結された構成とされる。かくして、スピンドル１２１は、本体ハウジング１０３の長軸方向に対して、概ね直交状に配置される。これにより、砥石１２５の回転軸方向が、本体ハウジング１０３の長軸方向に対して、交差状に配置されたアングル型のディスクグラインダ１０１が構成される。なお、回転子１１７の下方において、当該回転子１１７のボス部１１７ａの外側には、冷却ファン１１９が嵌合固定されている。冷却ファン１１９は、回転子１１７と一体に回転することで、インナハウジング１０５内に上方から下方へと流れる空気流れを生じさせる。冷却ファン１１９は、この空気流れにより、主に駆動モータ１１１の冷却を行う。 The rotor 117 is fixed to the spindle 121 press-fitted into the cylindrical hole of the boss portion 117a. That is, the rotor 117 and the spindle 121 are arranged coaxially with each other and are directly connected. Thus, the spindle 121 is arranged substantially orthogonal to the major axis direction of the main body housing 103. As a result, the angle-type disc grinder 101 is configured in which the rotational axis direction of the grindstone 125 is arranged to intersect the major axis direction of the main body housing 103. A cooling fan 119 is fitted and fixed to the outside of the boss 117a of the rotor 117 below the rotor 117. The cooling fan 119 rotates integrally with the rotor 117 to generate an air flow that flows from the upper side to the lower side in the inner housing 105. The cooling fan 119 mainly cools the drive motor 111 by this air flow.
　スピンドル１２１は、回転子１１７のボス部１１７ａを貫通し、更にインナハウジング１０５の円筒部１０５ａ内を遊嵌状に貫通している。そして、スピンドル１２１は、上方へと延在するとともに、その上端部が軸受１３１を介して、インナハウジング１０５に回転自在に支持される。また、スピンドル１２１は、冷却ファン１１９の下方において、軸受１３３を介して、インナハウジング１０５に回転自在に支持されている。このように、スピンドル１２１は、上下の軸受１３１，１３３によって、長軸方向の両側で支持される。スピンドル１２１の当該上下の軸受１３１，１３３間には、回転子１１７及び冷却ファン１１９が配置されている。このため、これら回転子１１７及び冷却ファン１１９の回転動作が安定する。 The spindle 121 passes through the boss portion 117a of the rotor 117, and further passes through the cylindrical portion 105a of the inner housing 105 in a loose fit. The spindle 121 extends upward, and an upper end portion of the spindle 121 is rotatably supported by the inner housing 105 via a bearing 131. The spindle 121 is rotatably supported by the inner housing 105 via a bearing 133 below the cooling fan 119. Thus, the spindle 121 is supported on both sides in the long axis direction by the upper and lower bearings 131 and 133. A rotor 117 and a cooling fan 119 are disposed between the upper and lower bearings 131 and 133 of the spindle 121. For this reason, the rotation operation of the rotor 117 and the cooling fan 119 is stabilized.
　また、スピンドル１２１は、下側の軸受１３３を貫通して、更に下方へと延在される。スピンドル１２１は、インナハウジング１０５の下面から、外部に所定長さで突出されており、当該突出端部が、砥石１２５を取付ける砥石取付部１２１ａとして設定されている。砥石１２５は、対向状に配置される内側と外側の２つのフランジ部材１２７ａ，１２７ｂからなるツールホルダ１２７によって、砥石取付部１２１ａに着脱自在に取付けられ、スピンドル１２１と一体に回転される。なお、インナハウジング１０５は、本体ハウジング１０３の駆動機構収容部１０３Ｂの下面から、一部が下方へ突出されており、当該突出部に砥石カバー１２９が取付けられている。この砥石カバー１２９によって、砥石１２５の後半周が覆われ、加工作業時に生じた研削粉等の後方への飛散を、防止するようになっている。 Further, the spindle 121 passes through the lower bearing 133 and extends further downward. The spindle 121 protrudes from the lower surface of the inner housing 105 to the outside by a predetermined length, and the protruding end portion is set as a grindstone mounting portion 121 a for attaching the grindstone 125. The grindstone 125 is detachably attached to the grindstone attachment portion 121a by a tool holder 127 including two inner and outer flange members 127a and 127b arranged to face each other, and is rotated integrally with the spindle 121. Note that a part of the inner housing 105 protrudes downward from the lower surface of the drive mechanism housing portion 103B of the main body housing 103, and a grindstone cover 129 is attached to the protruding portion. The grindstone cover 129 covers the latter half of the grindstone 125, and prevents grinding powder and the like generated during the machining operation from being scattered backward.
　次に本体ハウジング１０３の駆動機構収容部１０３Ｂに対するインナハウジング１０５の取付け構造（接合構造）につき説明する。駆動機構収容部１０３Ｂ内に収容されるインナハウジング１０５は、上下方向（スピンドル１２１の長軸方向）に関して２分割された上下のハウジング構成部材１０５Ａ，１０５Ｂを、突合せ状に結合することによって、略円筒形の筒状部材として構成される。そして、インナハウジング１０５と本体ハウジング１０３との間には、上下２つの防振ゴム１３５，１３７が、介在状に配置されている。この防振ゴム１３５，１３７が、インナハウジング１０５から本体ハウジング１０３へ伝達する振動を遮断ないし低減する。防振ゴム１３５，１３７は、本発明における「弾性部材」に対応する。 Next, the mounting structure (joining structure) of the inner housing 105 to the drive mechanism housing portion 103B of the main body housing 103 will be described. The inner housing 105 accommodated in the drive mechanism accommodating portion 103B is formed in a substantially cylindrical shape by joining upper and lower housing constituent members 105A and 105B divided in two in the vertical direction (long axis direction of the spindle 121). It is configured as a cylindrical member. Between the inner housing 105 and the main body housing 103, two upper and lower vibration isolating rubbers 135 and 137 are disposed in an intervening manner. The anti-vibration rubbers 135 and 137 block or reduce vibration transmitted from the inner housing 105 to the main body housing 103. The anti-vibration rubbers 135 and 137 correspond to “elastic members” in the present invention.
　上側の防振ゴム１３５は、下向きの略カップ状に形成され、インナハウジング１０５の上方領域（上側のハウジング構成部材１０５Ａ）の外側を覆うように、上方から嵌合状に取付けられている。本体ハウジング１０３の駆動機構収容部１０３Ｂの内壁面のうち、周壁面には、径方向に突出する横リブ１４１が、上下方向（長軸方向）に複数形成されている。また、本体ハウジング１０３の駆動機構収容部１０３Ｂの内壁面のうち、上壁面には、長軸方向下向きに突出する縦リブ１４３が、径方向に複数形成されている。そして、キャップ状の上側の防振ゴム１３５は、横リブ１４１及び縦リブ１４３の突出端面とインナハウジング１０５の外壁面（周壁面及び上壁面）との間に挟まれて固定されている。 The upper anti-vibration rubber 135 is formed in a substantially downward cup shape, and is fitted from above so as to cover the outside of the upper region of the inner housing 105 (upper housing constituent member 105A). Of the inner wall surface of the drive mechanism housing portion 103B of the main body housing 103, a plurality of lateral ribs 141 projecting in the radial direction are formed in the vertical direction (long axis direction) on the peripheral wall surface. A plurality of longitudinal ribs 143 projecting downward in the long axis direction are formed on the upper wall surface of the inner wall surface of the drive mechanism housing portion 103B of the main body housing 103 in the radial direction. The cap-shaped upper anti-vibration rubber 135 is sandwiched and fixed between the protruding end surfaces of the horizontal rib 141 and the vertical rib 143 and the outer wall surface (the peripheral wall surface and the upper wall surface) of the inner housing 105.
　一方、インナハウジング１０５の下方領域（下側のハウジング構成部材１０５Ｂ）は、長軸方向に関して上側が大径とされ、下側が小径とされた段付きの円筒状に形成されている。下側の防振ゴム１３７は、円環状に形成されている。下側の防振ゴム１３７は、下側のハウジング構成部材１０５Ｂの小径部分に嵌合された状態で、当該小径部分と大径部分との境界面に相当する段差部１４５と、本体ハウジング１０３における駆動機構収容部１０３Ｂの下部に形成された内向きの張出部１４７との間に、上下方向から挟まれて固定されている。かくして、インナハウジング１０５は、本体ハウジング１０３の駆動機構収容部１０３Ｂに対して、上下の防振ゴム１３５，１３７を介在して、嵌合状に取付けられる。駆動機構収容部１０３Ｂは、本発明における「所定の部分」に対応する実施構成の一例である。また、駆動機構収容部１０３Ｂのうち、インナハウジング１０５の上壁部と対向する縦リブ１４３を含む上壁部が、本発明における「軸方向領域」に対応し、インナハウジング１０５の周壁部と対向する横リブ１４１を含む周壁部が、本発明における「径方向領域」に対応する実施構成の一例である。 On the other hand, the lower region (lower housing component 105B) of the inner housing 105 is formed in a stepped cylindrical shape having a large diameter on the upper side and a small diameter on the lower side in the major axis direction. The lower vibration-proof rubber 137 is formed in an annular shape. The lower anti-vibration rubber 137 is fitted to the small-diameter portion of the lower housing component member 105 </ b> B, and a step 145 corresponding to the boundary surface between the small-diameter portion and the large-diameter portion, and the main body housing 103. It is sandwiched and fixed from above and below with an inwardly extending portion 147 formed at the lower portion of the drive mechanism housing portion 103B. Thus, the inner housing 105 is attached to the drive mechanism housing portion 103 </ b> B of the main body housing 103 in a fitting manner with the upper and lower vibration isolating rubbers 135 and 137 interposed therebetween. The drive mechanism housing portion 103B is an example of an implementation configuration corresponding to the “predetermined portion” in the present invention. In addition, the upper wall portion including the vertical rib 143 that faces the upper wall portion of the inner housing 105 in the drive mechanism housing portion 103B corresponds to the “axial region” in the present invention and faces the peripheral wall portion of the inner housing 105. The peripheral wall portion including the transverse rib 141 is an example of an implementation configuration corresponding to the “radial region” in the present invention.
　上記のように取付けられたインナハウジング１０５に対して、砥石１２５の駆動機構１１３を介して、長軸方向の力が入力された場合には、駆動機構収容部１０３Ｂの縦リブ１４３とインナハウジング１０５の上壁面で挟まれた上側のカップ状の防振ゴム１３５の円板部１３５ａと、インナハウジング１０５の段差部１４５と駆動機構収容部１０３Ｂの張出部１４７で挟まれた下側の円環状の防振ゴム１３７とのうちの一方が、圧縮変形することにより、長軸方向の力を吸収ないし低減する。すなわち、砥石１２５側から駆動モータ１１１側に向かう上向きの力に対しては、上側のカップ状の防振ゴム１３５の円板部１３５ａが圧縮変形することで対応し、駆動モータ１１１側から砥石１２５側に向かう下向きの力に対しては、下側の円環状の防振ゴム１３７が圧縮変形することで対応する。 When a force in the long axis direction is input to the inner housing 105 attached as described above via the drive mechanism 113 of the grindstone 125, the vertical rib 143 of the drive mechanism housing portion 103B and the inner housing 105 are input. The lower circular ring sandwiched between the disc part 135a of the upper cup-shaped anti-vibration rubber 135 sandwiched by the upper wall surface, the step part 145 of the inner housing 105 and the overhanging part 147 of the drive mechanism housing part 103B. One of the anti-vibration rubber 137 compresses and deforms to absorb or reduce the force in the long axis direction. In other words, an upward force directed from the grindstone 125 toward the drive motor 111 is dealt with by compressing and deforming the disc portion 135a of the upper cup-shaped anti-vibration rubber 135. The downward force toward the side is dealt with by compressing and deforming the lower annular vibration-proof rubber 137.
　一方、インナハウジング１０５に対して、長軸方向と交差する径方向（本体ハウジング１０３の長軸方向）の力が入力された場合には、駆動機構収容部１０３Ｂの横リブ１４１とインナハウジング１０５の周壁面で挟まれた上側のカップ状の防振ゴム１３５の胴体部（円周部）１３５ｂのうち、上記力の入力方向に対向する部位が圧縮変形する。当該圧縮変形により、径方向の力を吸収ないし低減する。例えば、駆動モータ１１１側からバッテリパック１１０側に向かう後向きの力が入力された場合には、図２の右側部位が圧縮変形し、その逆方向の前向きの力が入力された場合には、図２の左側部位が圧縮変形し、前後方向と交差する右向きの力が入力された場合には、図３の右側部位が圧縮変形し、左向きの力が入力された場合には、図３の左側部位が圧縮変形する。円板部１３５ａ及び円環状の防振ゴム１３７が、本発明における「第１領域」に対応し、胴体部１３５ｂが、本発明における「第２領域」に対応する実施構成の一例である。 On the other hand, when a force in a radial direction (long axis direction of the main body housing 103) intersecting the long axis direction is input to the inner housing 105, the lateral rib 141 of the drive mechanism housing portion 103B and the inner housing 105 Of the body portion (circumferential portion) 135b of the upper cup-shaped anti-vibration rubber 135 sandwiched between the peripheral wall surfaces, a portion facing the input direction of the force is compressed and deformed. The compressive deformation absorbs or reduces the radial force. For example, when a backward force from the drive motor 111 side to the battery pack 110 side is input, the right side portion of FIG. 2 is compressed and deformed, and when a reverse force in the opposite direction is input, 3 is compressed and deformed, and when a rightward force intersecting the front-rear direction is input, the rightward portion of FIG. 3 is compressed and deformed, and when a leftward force is input, the left side of FIG. The part is compressed and deformed. The disc portion 135a and the annular vibration-proof rubber 137 correspond to the “first region” in the present invention, and the body portion 135b is an example of an implementation configuration corresponding to the “second region” in the present invention.
　本実施の形態に係るディスクグラインダ１０１は、上記のように構成されている。従って、本体ハウジング１０３の把持部１０３Ａを手で把持し、把持部１０３Ａに取り付けられたトリガ１０４を引き操作して、駆動モータ１１１を通電駆動すれば、回転子１１７に直結されたスピンドル１２１と共に砥石１２５が回転駆動される。このため、被加工材の研削や研磨作業あるいは切断作業等の加工作業を行うことができる。 The disc grinder 101 according to the present embodiment is configured as described above. Accordingly, if the gripping portion 103A of the main body housing 103 is gripped by hand, the trigger 104 attached to the gripping portion 103A is pulled and the drive motor 111 is energized to drive the grindstone together with the spindle 121 directly connected to the rotor 117. 125 is driven to rotate. For this reason, it is possible to perform processing operations such as grinding, polishing operation or cutting operation of the workpiece.
　本実施の形態によれば、加工作業時において、砥石１２５の駆動ないし砥石１２５による被加工材に対する研削・研磨等の加工作業によって、砥石１２５の駆動機構１１３に振動が発生した場合、インナハウジング１０５を経て、本体ハウジング１０３側に伝達する当該駆動機構１１３の振動を、防振ゴム１３５，１３７の圧縮変形によって、遮断ないし低減することができる。これにより、本体ハウジング１０３の把持部１０３Ａを把持して加工作業を行う際の把持部１０３Ａの使用性を、向上することができる。 According to the present embodiment, when vibration is generated in the drive mechanism 113 of the grindstone 125 due to driving of the grindstone 125 or grinding / polishing of the workpiece with the grindstone 125 during the machining operation, the inner housing 105 Then, the vibration of the drive mechanism 113 transmitted to the main body housing 103 side can be cut off or reduced by compressive deformation of the anti-vibration rubbers 135 and 137. Accordingly, it is possible to improve the usability of the gripping portion 103A when gripping the gripping portion 103A of the main body housing 103 and performing a processing operation.
　加工作業時には、スピンドル１２１の少なくとも長軸方向と径方向との二方向に振動が発生する。このため、例えば、防振ゴムが、長軸方向と径方向のうちの一方向については圧縮荷重を受け、他方向については剪断荷重を受ける形で、防振ゴムにより振動発生領域と作業者の把持領域とを連結した場合には、防振ゴムは、圧縮剛性に比べ剪断剛性が低い関係にあることから、剪断荷重を受ける方向に関して、把持領域がぐらつき易くなるといった問題がある。しかるに、本実施の形態では、把持部１０３Ａを有する本体ハウジング１０３と、駆動モータ１１１を含む砥石１２５の駆動機構１１３を収容するインナハウジング１０５とを、スピンドル１２１の長軸方向と径方向との二方向それぞれについて、防振ゴム１３５，１３７により圧縮荷重を受ける形で、弾性連結する構成としている。このため、スピンドル１２１の長軸方向と径方向との二方向それぞれについて、防振ゴム１３５，１３７が、同程度の剛性を有するように設定することが可能となる。この結果、把持部１０３Ａを把持してディスクグラインダ１０１を操作する際の操作性を向上することができる。 During the machining operation, vibration is generated in at least two directions of the spindle 121 in the long axis direction and the radial direction. For this reason, for example, the vibration isolating rubber receives a compressive load in one of the major axis direction and the radial direction, and receives a shear load in the other direction. When the gripping region is connected, the vibration-proof rubber has a relationship that the shearing rigidity is lower than the compression rigidity, so that there is a problem that the gripping region is likely to wobble in the direction of receiving the shear load. However, in this embodiment, the main body housing 103 having the grip portion 103A and the inner housing 105 that houses the drive mechanism 113 of the grindstone 125 including the drive motor 111 are arranged in two directions, ie, the major axis direction and the radial direction of the spindle 121. Each direction is elastically connected in such a way as to receive a compressive load by the anti-vibration rubbers 135 and 137. For this reason, it is possible to set the anti-vibration rubbers 135 and 137 so as to have the same degree of rigidity in each of the two directions of the major axis direction and the radial direction of the spindle 121. As a result, it is possible to improve the operability when operating the disc grinder 101 while holding the grip portion 103A.
　また、本実施の形態では、上側の防振ゴム１３５を、下方が開放された下向きカップ状に形成し、本体ハウジング１０３の駆動機構収容部１０３Ｂと、駆動機構１１３を収容するインナハウジング１０５との間に、当該上側の防振ゴム１３５を嵌合状に介在する構成としている。このため、インナハウジング１０５が、本体ハウジング１０３の駆動機構収容部１０３Ｂ内に位置するように、当該本体ハウジング１０３の左右のハウジング構成部材を互いに接合して組付ける場合において、カップ状の防振ゴム１３５を、予めインナハウジング１０５に上方から被せるように配置することができる。この結果、本体ハウジング１０３とインナハウジング１０５との組付け作業を容易に行うことができる。 Further, in the present embodiment, the upper anti-vibration rubber 135 is formed in a downward cup shape with the lower part opened, and the drive mechanism housing portion 103B of the main body housing 103 and the inner housing 105 housing the drive mechanism 113 are formed. In the meantime, the upper anti-vibration rubber 135 is interposed in a fitting manner. Therefore, when the left and right housing constituent members of the main body housing 103 are joined and assembled so that the inner housing 105 is positioned in the drive mechanism housing portion 103B of the main body housing 103, a cup-shaped vibration-proof rubber 135 can be disposed in advance so as to cover the inner housing 105 from above. As a result, the assembly work of the main body housing 103 and the inner housing 105 can be easily performed.
　また、上側の防振ゴム１３５を、下向きカップ状に形成したことにより、スピンドル１２１の長軸方向の圧縮荷重を受ける円板部１３５ａと、径方向の圧縮荷重を受ける胴体部１３５ｂを一体に形成することができる。この結果、円板部１３５ａと胴体部１３５ｂを別々に形成する場合に比べ、部品点数が削減されるとともに、取り扱い易い。 Further, by forming the upper anti-vibration rubber 135 in a downward cup shape, the disc portion 135a that receives the compression load in the major axis direction of the spindle 121 and the body portion 135b that receives the compression load in the radial direction are integrally formed. can do. As a result, the number of parts is reduced and the handling is easy as compared with the case where the disc part 135a and the body part 135b are formed separately.
　また、本実施の形態では、駆動モータ１１１として外側の回転子１１７が回転するアウタロータ型モータを採用している。このため、駆動モータ１１１の回転部分の外径を大きく形成することができて、駆動モータ１１１に大きなロータ慣性モーメントを持たせることが可能となる。このため、本実施形態のディスクグラインダ１０１では、インナロータ型モータを採用したディスクグラインダに比べて、大きなトルクを発生することができる。これにより、回転子１１７に対してスピンドル１２１を直結する構成を採用することが可能となる。また、回転子１１７とスピンドル１２１間に減速機構のような動力伝達部材を介在する構造に比べて、作業領域、特にインナハウジング１０５の小型化、軽量化を実現することができる。さらに、本体ハウジング１０３の把持部１０３Ａについては、把持し易い設計が可能となるため、操作性を向上できる。 Further, in the present embodiment, an outer rotor type motor in which the outer rotor 117 rotates is adopted as the drive motor 111. For this reason, the outer diameter of the rotating part of the drive motor 111 can be formed large, and the drive motor 111 can have a large rotor inertia moment. For this reason, the disc grinder 101 of the present embodiment can generate a larger torque than the disc grinder that employs the inner rotor type motor. Accordingly, it is possible to employ a configuration in which the spindle 121 is directly connected to the rotor 117. Further, as compared with a structure in which a power transmission member such as a speed reduction mechanism is interposed between the rotor 117 and the spindle 121, the work area, in particular, the inner housing 105 can be reduced in size and weight. Furthermore, the grip portion 103A of the main body housing 103 can be designed to be easily gripped, so that operability can be improved.
　なお、本実施の形態では、弾性部材として防振ゴム１３５，１３７を用いた場合で説明したが、防振ゴム１３５，１３７をバネに変更してもよい。また、下側の防振ゴム１３７につき、上側の防振ゴム１３５と同様なカップ状に形成してもよい。また、上側のカップ状の防振ゴム１３５につき、円板部１３５ａと胴体部１３５ｂとを別々に形成しても構わない。また、本体ハウジング１０３とインナハウジング１０５とを、スピンドル１２１の周方向についても、圧縮荷重を受けるように弾性連結しても構わない。 In the present embodiment, the vibration isolating rubber 135, 137 is used as the elastic member. However, the vibration isolating rubber 135, 137 may be changed to a spring. Further, the lower anti-vibration rubber 137 may be formed in a cup shape similar to the upper anti-vibration rubber 135. Further, the disc part 135a and the body part 135b may be formed separately for the upper cup-shaped vibration-proof rubber 135. Further, the main body housing 103 and the inner housing 105 may be elastically coupled so as to receive a compressive load in the circumferential direction of the spindle 121.
　また、本実施の形態は、電動工具の一例として、電動ディスクグラインダ１０１を用いて説明したが、電動ディスクグラインダ１０１に限らず、本体ハウジング１０３の一部を作業者が把持する把持部１０３Ａとして設置する構成の電動工具であれば、把持部１０３Ａの延在方向（長軸方向）が、スピンドル１２１の長軸方向に平行であるか交差しているかを問わず、適用可能である。 Moreover, although this Embodiment demonstrated using the electric disc grinder 101 as an example of an electric tool, not only the electric disc grinder 101 but installation as 103 A of holding parts which an operator hold | grips a part of main body housing 103 is installed. If it is the electric tool of the structure to which it is applied, it is applicable regardless of whether the extending direction (long axis direction) of the grip portion 103A is parallel to or intersects with the long axis direction of the spindle 121.
（実施形態の各構成要素と本発明の各構成要素の対応関係）
　本実施形態は、本発明を実施するための形態の一例を示すものである。したがって、本発明は、本実施形態の構成に限定されるものではない。なお、本実施形態の各構成要素と本発明の各構成要素の対応関係を以下に示す。
　本体ハウジング１０３は、本発明の「グリップ領域」に対応する構成の一例である。
　駆動モータ１１１は、本発明の「モータ」に対応する構成の一例である。
　スピンドル１２１は、本発明の「工具回転軸」に対応する構成の一例である。
　砥石１２５は、本発明の「先端工具」に対応する構成の一例である。
　インナハウジング１０５は、本発明の「作業領域」に対応する構成の一例である。
　防振ゴム１３５，１３７は、本発明の「弾性部材」に対応する構成の一例である。
駆動機構収容部１０３Ｂは、本発明の「所定の部分」に対応する構成の一例である。
　駆動機構収容部１０３Ｂのうち、インナハウジング１０５の上壁部と対向する縦リブ１４３を含む上壁部は、本発明の「軸方向領域」に対応する構成の一例である。
　インナハウジング１０５の周壁部と対向する横リブ１４１を含む周壁部は、本発明の「径方向領域」に対応する構成の一例である。
　円板部１３５ａは、本発明の「第１領域」に対応する構成の一例である。
　円環状の防振ゴム１３７は、本発明の「第１領域」に対応する構成の一例である。
　胴体部１３５ｂは、本発明の「第２領域」に対応する構成の一例である。 (Correspondence between each component of the embodiment and each component of the present invention)
This embodiment shows an example for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the present embodiment. The correspondence between each component of the present embodiment and each component of the present invention is shown below.
The main body housing 103 is an example of a configuration corresponding to the “grip region” of the present invention.
The drive motor 111 is an example of a configuration corresponding to the “motor” of the present invention.
The spindle 121 is an example of a configuration corresponding to the “tool rotation axis” of the present invention.
The grindstone 125 is an example of a configuration corresponding to the “tip tool” of the present invention.
The inner housing 105 is an example of a configuration corresponding to the “working area” of the present invention.
The anti-vibration rubbers 135 and 137 are an example of a configuration corresponding to the “elastic member” of the present invention.
The drive mechanism housing portion 103B is an example of a configuration corresponding to the “predetermined portion” of the present invention.
The upper wall portion including the vertical ribs 143 facing the upper wall portion of the inner housing 105 in the drive mechanism housing portion 103B is an example of a configuration corresponding to the “axial region” of the present invention.
The peripheral wall portion including the lateral rib 141 facing the peripheral wall portion of the inner housing 105 is an example of a configuration corresponding to the “radial region” of the present invention.
The disc part 135a is an example of a configuration corresponding to the “first region” of the present invention.
The annular vibration-proof rubber 137 is an example of a configuration corresponding to the “first region” of the present invention.
The body portion 135b is an example of a configuration corresponding to the “second region” of the present invention.
　以上の発明の趣旨に鑑み、本発明に係る作業工具は、下記の態様が構成可能である。
（態様１）
「先端工具の回転により被加工材に所定の加工作業を行う電動工具であって、
　回転子と固定子を有し、前記先端工具を回転駆動するためのモータと、前記回転子の回転軸と同軸上に配置されるとともに、前記先端工具を取付けるための工具回転軸とが配置された作業領域と、
　作業者が把持するためのグリップ領域と、
　前記作業領域と前記グリップ領域との間に介在状に配置された弾性部材と、
　を有する電動工具。」
（態様２）
「前記態様１に記載の電動工具であって、
前記回転子と前記工具回転軸とは一体とされていることを特徴とする電動工具。」
（態様３）
「前記態様１又は２に記載の電動工具であって、
　前記弾性部材は、前記工具回転軸の長軸方向及び当該長軸方向と交差する方向の二方向それぞれについて、少なくとも圧縮荷重を受ける態様で、前記作業領域と前記グリップ領域とを互いに弾性連結していることを特徴とする電動工具。」
（態様４）
「前記態様３に記載の電動工具であって、
　前記弾性部材は、前記工具回転軸の長軸方向の圧縮荷重を受ける第１領域と、前記工具回転軸の長軸方向と交差する方向の圧縮荷重を受ける第２領域とを有し、前記第１領域と第２領域が互いに一体に形成されていることを特徴とする電動工具。」
　（態様５）
「前記態様３に記載の電動工具であって、
　前記弾性部材は、前記工具回転軸の周方向について圧縮荷重を受ける態様で、前記作業領域と前記グリップ領域とを互いに弾性連結していることを特徴とする電動工具。」
　（態様６）
「前記態様１から５のいずれか１つに記載の電動工具であって、
　前記工具回転軸は、長軸方向の一端側において前記先端工具の取付けが可能とされており、
　前記グリップ領域は、前記工具回転軸の長軸方向において、前記作業領域を基準として前記先端工具と反対側に形成された軸方向領域と、前記工具回転軸の長軸方向と交差する方向において、前記作業領域の外側に形成された径方向領域を有し、
　前記弾性部材は、前記軸方向領域と前記作業領域の間及び前記径方向領域と前記作業領域の間のそれぞれに介在状に配置されていることを特徴とする電動工具。」
　（態様７）
「態様１から６のいずれか１つに記載の電動工具であって、
　前記作業領域は、前記グリップ領域の所定の部分に嵌合状に取付けられ、
　前記弾性部材は、前記作業領域と前記グリップ領域との嵌合部において前記作業領域の少なくとも一部を覆うように配置されていることを特徴とする電動工具。」
　（態様８）
「前記態様１から７のいずれか１つに記載の電動工具であって、
　前記モータは、前記回転子が前記固定子の外側に配置されたアウタロータ型モータであることを特徴とする電動工具。」
　（態様９）
「前記態様１から８のいずれか１つに記載の電動工具であって、
　前記グリップ領域は、長尺状に形成されるとともに、当該長尺方向が前記工具回転軸の長軸方向と交差するように配置されていることを特徴とする電動工具。」 In view of the gist of the above invention, the working tool according to the present invention can be configured in the following manner.
(Aspect 1)
"A power tool that performs a predetermined processing operation on a workpiece by rotating the tip tool,
A motor that has a rotor and a stator and that drives the tip tool to rotate, and is arranged coaxially with the rotation axis of the rotor and a tool rotation axis for mounting the tip tool. Working area,
A grip area for the operator to hold,
An elastic member disposed in an intervening manner between the work area and the grip area;
A power tool having "
(Aspect 2)
“The power tool according to the first aspect,
The power tool, wherein the rotor and the tool rotation shaft are integrated. "
(Aspect 3)
“The power tool according to the first aspect or the second aspect,
The elastic member elastically connects the work area and the grip area to each other in a mode that receives at least a compressive load in each of two directions of the major axis direction of the tool rotation axis and the direction intersecting the major axis direction. An electric tool characterized by having "
(Aspect 4)
“The power tool according to the third aspect,
The elastic member includes a first region that receives a compressive load in a major axis direction of the tool rotation axis, and a second region that receives a compressive load in a direction intersecting the major axis direction of the tool rotation axis, A power tool characterized in that the first region and the second region are formed integrally with each other. "
(Aspect 5)
“The power tool according to the third aspect,
The said elastic member is the aspect which receives the compressive load about the circumferential direction of the said tool rotating shaft, The said working area | region and the said grip area | region are mutually elastically connected, The electric tool characterized by the above-mentioned. "
(Aspect 6)
“The power tool according to any one of the first to fifth aspects,
The tool rotation shaft is capable of mounting the tip tool on one end side in the long axis direction,
In the major axis direction of the tool rotation axis, the grip region is an axial region formed on the opposite side of the tip tool with respect to the work area, and in a direction intersecting the major axis direction of the tool rotation axis, Having a radial region formed outside the working region;
The electric tool according to claim 1, wherein the elastic member is disposed between the axial region and the work region and between the radial region and the work region. "
(Aspect 7)
“The power tool according to any one of aspects 1 to 6,
The work area is attached to a predetermined portion of the grip area in a fitting manner,
The electric tool according to claim 1, wherein the elastic member is disposed so as to cover at least a part of the work area at a fitting portion between the work area and the grip area. "
(Aspect 8)
“The power tool according to any one of aspects 1 to 7,
The electric motor according to claim 1, wherein the motor is an outer rotor type motor in which the rotor is disposed outside the stator. "
(Aspect 9)
“The power tool according to any one of aspects 1 to 8,
The power tool is characterized in that the grip region is formed in a long shape and is arranged so that the long direction intersects the long axis direction of the tool rotation axis. "
１０１　電動ディスクグラインダ（電動工具）
１０３　本体ハウジング（グリップ領域）
１０３Ａ　把持部
１０３Ｂ　駆動機構収容部（所定の部分）
１０４　トリガ
１０５　インナハウジング（作業領域）
１０５Ａ　ハウジング構成部材
１０５Ｂ　ハウジング構成部材
１０５ａ　円筒部
１１０　バッテリパック
１１１　駆動モータ（モータ）
１１３　駆動機構
１１５　固定子
１１６　駆動コイル
１１７　回転子
１１７ａ　ボス部
１１８　磁石
１１９　冷却ファン
１２１　スピンドル（工具回転軸）
１２１ａ　砥石取付部
１２５　砥石（先端工具）
１２７　ツールホルダ
１２７ａ，１２７ｂ　フランジ部材
１２９　砥石カバー
１３１　軸受
１３３　軸受
１３５　カップ状の防振ゴム（弾性部材）
１３５ａ　円板部（第１領域）
１３５ｂ　胴体部（第２領域）
１３７　円環状の防振ゴム（弾性部材、第１領域）
１４１　横リブ（径方向領域）
１４３　縦リブ（軸方向領域）
１４５　段差部
１４７　張出部 101 Electric disc grinder (Electric tool)
103 Body housing (grip area)
103A Grip part 103B Drive mechanism accommodation part (predetermined part)
104 Trigger 105 Inner housing (work area)
105A Housing constituent member 105B Housing constituent member 105a Cylindrical portion 110 Battery pack 111 Drive motor (motor)
113 Drive mechanism 115 Stator 116 Drive coil 117 Rotor 117a Boss part 118 Magnet 119 Cooling fan 121 Spindle (tool rotation axis)
121a Whetstone mounting part 125 Whetstone (tip tool)
127 Tool holder 127a, 127b Flange member 129 Grinding wheel cover 131 Bearing 133 Bearing 135 Cup-shaped vibration isolating rubber (elastic member)
135a Disc part (first region)
135b trunk (second region)
137 Circular anti-vibration rubber (elastic member, first region)
141 Lateral rib (radial area)
143 Longitudinal rib (Axial region)
145 Stepped portion 147 Overhang portion

Claims (8)

  1. 　先端工具の回転により被加工材に所定の加工作業を行う電動工具であって、
    　回転子と固定子を有し、前記先端工具を回転駆動するためのモータと、前記回転子の回転軸と同軸上に配置されるとともに、前記先端工具を取付けるための工具回転軸と、が配置された作業領域と、
    　作業者が把持するためのグリップ領域と、
    　前記作業領域と前記グリップ領域との間に介在状に配置された弾性部材と、
    　を有する電動工具。     A power tool that performs a predetermined processing operation on a workpiece by rotation of a tip tool,
    A motor having a rotor and a stator, for driving the tip tool to rotate, and a tool rotating shaft for mounting the tip tool arranged on the same axis as the rotating shaft of the rotor. Working area,
    A grip area for the operator to hold,
    An elastic member disposed in an intervening manner between the work area and the grip area;
    A power tool having
  2. 　請求項１に記載の電動工具であって、
    　前記回転子と前記工具回転軸とは一体とされていることを特徴とする電動工具。     The electric tool according to claim 1,
    The power tool, wherein the rotor and the tool rotation shaft are integrated.
  3. 　請求項１又は２に記載の電動工具であって、
    　前記弾性部材は、前記工具回転軸の長軸方向及び当該長軸方向と交差する方向の二方向それぞれについて、少なくとも圧縮荷重を受ける態様で、前記作業領域と前記グリップ領域とを互いに弾性連結していることを特徴とする電動工具。     The electric tool according to claim 1 or 2,
    The elastic member elastically connects the work area and the grip area to each other in a mode that receives at least a compressive load in each of two directions of the major axis direction of the tool rotation axis and the direction intersecting the major axis direction. An electric tool characterized by having
  4. 　請求項３に記載の電動工具であって、
    　前記弾性部材は、前記工具回転軸の長軸方向の圧縮荷重を受ける第１領域と、前記工具回転軸の長軸方向と交差する方向の圧縮荷重を受ける第２領域とを有し、前記第１領域と第２領域が互いに一体に形成されていることを特徴とする電動工具。     The electric tool according to claim 3,
    The elastic member includes a first region that receives a compressive load in a major axis direction of the tool rotation axis, and a second region that receives a compressive load in a direction intersecting the major axis direction of the tool rotation axis, A power tool characterized in that the first region and the second region are formed integrally with each other.
  5. 　請求項１から４のいずれか１項に記載の電動工具であって、
    　前記工具回転軸は、長軸方向の一端側において前記先端工具の取付けが可能とされており、
    　前記グリップ領域は、前記工具回転軸の長軸方向において、前記作業領域を基準として前記先端工具と反対側に形成された軸方向領域と、前記工具回転軸の長軸方向と交差する方向において、前記作業領域の外側に形成された径方向領域を有し、
    　前記弾性部材は、前記軸方向領域と前記作業領域の間及び前記径方向領域と前記作業領域の間のそれぞれに介在状に配置されていることを特徴とする電動工具。     The electric tool according to any one of claims 1 to 4,
    The tool rotation shaft is capable of mounting the tip tool on one end side in the long axis direction,
    In the major axis direction of the tool rotation axis, the grip region is an axial region formed on the opposite side of the tip tool with respect to the work area, and in a direction intersecting the major axis direction of the tool rotation axis, Having a radial region formed outside the working region;
    The power tool according to claim 1, wherein the elastic member is disposed between the axial region and the work region and between the radial region and the work region.
  6. 　請求項１～５のいずれかに記載の電動工具であって、
    　前記作業領域は、前記グリップ領域の所定の部分に嵌合状に取付けられ、
    　前記弾性部材は、前記作業領域と前記グリップ領域との嵌合部において前記作業領域の少なくとも一部を覆うように配置されていることを特徴とする電動工具。     The power tool according to any one of claims 1 to 5,
    The work area is attached to a predetermined portion of the grip area in a fitting manner,
    The electric tool, wherein the elastic member is arranged so as to cover at least a part of the work area at a fitting portion between the work area and the grip area.
  7. 　請求項１～６のいずれかに記載の電動工具であって、
    　前記モータは、前記回転子が前記固定子の外側に配置されたアウタロータ型モータであることを特徴とする電動工具。     The power tool according to any one of claims 1 to 6,
    The electric motor according to claim 1, wherein the motor is an outer rotor type motor in which the rotor is disposed outside the stator.
  8. 　請求項１～７のいずれかに記載の電動工具であって、
    　前記グリップ領域は、長尺状に形成されるとともに、当該長尺方向が前記工具回転軸の長軸方向と交差するように配置されていることを特徴とする電動工具。     The power tool according to any one of claims 1 to 7,
    The grip region is formed in a long shape, and is arranged such that the long direction intersects the long axis direction of the tool rotation axis.
PCT/JP2012/078951 2011-12-06 2012-11-08 Power tool WO2013084655A1 (en)

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