WO2021199816A1 - Work machine - Google Patents

Work machine Download PDF

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Publication number
WO2021199816A1
WO2021199816A1 PCT/JP2021/007391 JP2021007391W WO2021199816A1 WO 2021199816 A1 WO2021199816 A1 WO 2021199816A1 JP 2021007391 W JP2021007391 W JP 2021007391W WO 2021199816 A1 WO2021199816 A1 WO 2021199816A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
housing
main body
battery
handle
Prior art date
Application number
PCT/JP2021/007391
Other languages
French (fr)
Japanese (ja)
Inventor
康太郎 小倉
智志 阿部
Original Assignee
工機ホールディングス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 工機ホールディングス株式会社 filed Critical 工機ホールディングス株式会社
Priority to JP2022511668A priority Critical patent/JP7468625B2/en
Publication of WO2021199816A1 publication Critical patent/WO2021199816A1/en

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Classifications

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

Definitions

  • the present invention relates to a working machine.
  • the hammer drill (working machine) described in Patent Document 1 below has a hammer drill main body and a battery pack.
  • the hammer drill body has a housing that constitutes the outer shell of the hammer drill body, and the housing includes a motor housing and a handle housing.
  • the battery pack is mounted on the handle housing.
  • the handle housing is provided with an elastic body, and the elastic body is arranged on the front side of the battery pack. Specifically, the elastic body is compressed and deformed back and forth by the handle housing and the battery pack. Thereby, for example, it is possible to suppress the vibration of the battery pack with respect to the hammer drill body when the hammer drill is operated.
  • the hammer drill has room for improvement in the following points. That is, in the hammer drill, the elastic body is compressionally deformed when the battery pack is attached to the handle housing. That is, when mounting the battery pack on the handle housing, it is necessary to slide the battery pack forward to the mounting position while compressing and deforming the elastic body. Therefore, the load for mounting the battery pack becomes high, and the mountability may decrease.
  • an object of the present invention is to provide a working machine capable of improving wearability while suppressing vibration of a battery pack.
  • One or more embodiments of the present invention include a motor, a main body for accommodating the motor, and a handle portion movably connected to the main body by an anti-vibration mechanism.
  • a battery pack that is detachably attached to the handle portion and supplies electric power to the motor, and a battery pack that is provided in the main body portion and is arranged between the battery pack and the main body portion, and the handle portion is It is a working machine provided with an elastic body that comes into contact with the battery pack and is compressed and deformed by moving relative to the main body.
  • the handle portion is relatively movable between a first position and a second position that approaches the housing from the first position, and the handle portion is capable of moving relative to the first position. By moving from the first position to the second position, the amount of compression of the elastic body compressed by the main body and the battery pack is increased.
  • One or more embodiments of the present invention is a working machine in which the elastic body is in contact with the battery pack at the first position.
  • One or more embodiments of the present invention is a working machine in which the elastic body is separated from the battery pack at the first position.
  • the handle portion has a two-layer structure including a layer made of a resin material and a layer made of an elastomer.
  • a working machine having a damper portion that connects the main body portion and the handle portion, and the damper portion constitutes a part of a layer formed by the elastomer.
  • the handle portion is configured to be movable relative to the main body portion in the first direction, and the housing side rail that guides the battery pack in the first direction.
  • the battery pack has a portion, and the battery pack is attached to the handle portion by moving to one side in the first direction, and the elastic body is arranged adjacent to one side in the first direction of the battery pack. It is a working machine.
  • the anti-vibration mechanism is a working machine having a guide mechanism for guiding the movement of the handle portion in the first direction.
  • the anti-vibration mechanism is provided at two locations, and the two anti-vibration mechanisms are arranged apart from each other in a second direction intersecting the first direction. It is a working machine.
  • the elastic body has a plurality of ribs protruding toward the battery pack, and the ribs intersect in the first direction and the second direction. It is a working machine that is arranged side by side in three directions and is formed at both ends of the elastic body in the third direction.
  • a pair of the ribs are formed at both ends of the elastic body in the third direction, and one of the pair of ribs corresponds to the battery pack. A working machine that is in contact and the other of the pair of ribs is separated from the battery pack.
  • wearability can be improved while suppressing vibration of the battery pack.
  • FIG. 3 is a vertical cross-sectional view showing a state in which the handle housing of the hammer drill shown in FIG. 2 is moved from the initial position to the pushing position.
  • (A) is a vertical cross-sectional view (enlarged cross-sectional view of part a in FIG. 2) showing an enlarged vibration-proof mechanism of the hammer drill shown in FIG. 2, and
  • (B) is a vibration-proof mechanism shown in (A).
  • FIG. 4A It is a perspective view which shows the guide mechanism of the vibration isolation mechanism shown in FIG. 4A.
  • A is a front view showing the battery pack of the hammer drill shown in FIG. 1 from the front side
  • (B) is a side view seen from the left side of the battery pack of (A).
  • A) is a cross-sectional view (7A-7A line cross-sectional view of FIG. 1) seen from the rear side showing the lower end portion of the hammer drill shown in FIG. 2, and
  • (B) is the handle housing shown in (A).
  • FIG. 1A is a cross-sectional view (cross-sectional view taken along the line 8A-8A of FIG. 1) showing the engagement state between the battery pack of the hammer drill shown in FIG. 1 and the handle housing
  • FIG. 1B is a cross-sectional view taken along the line 8A-8A of FIG.
  • FIG. 8 (B) shows the positional relationship between the battery holding member and the battery pack in the modification of the hammer drill shown in FIG.
  • the hammer drill 10 as a "working machine” according to the present embodiment will be described with reference to the drawings.
  • the hammer drill 10 is configured as a tool for drilling or the like in a workpiece.
  • the arrows UP, FR, and LH shown in the drawings indicate the upper side, the front side, and the left side of the hammer drill 10.
  • the vertical direction, front-back direction, and left-right direction of the hammer drill 10 shall be indicated unless otherwise specified.
  • the front-rear direction corresponds to the "first direction” of the present invention
  • the vertical direction corresponds to the "second direction” of the present invention
  • the left-right direction corresponds to the "third direction” of the present invention
  • the front side corresponds to the "one side in the first direction” of the present invention.
  • the hammer drill 10 has a housing 12, an inner cover 40 housed in the housing 12, a motor 43, and a transmission mechanism for transmitting the driving force of the motor 43 to the tip tool T. It includes 50, a battery pack 70, a battery holding member 80 as an "elastic body", and a control unit 90 for driving and controlling a motor 43. Further, the hammer drill 10 has an operation lever 68, and when the operation lever 68 is operated, the transmission path to the tip tool T in the transmission mechanism 50 is switched, and the hammer drill 10 rotates to the tip tool T. It is configured to switch to a drill mode in which a force is applied or a hammer drill mode in which a rotational force and a striking force are applied to the tip tool T.
  • each configuration of the hammer drill 10 will be described.
  • the housing 12 is formed in a hollow shape and constitutes the outer shell of the hammer drill 10.
  • the housing 12 has a main body housing 13 as a "main body portion” constituting the front portion of the housing 12, and a handle housing 16 as a "handle portion” constituting the rear portion of the housing 12.
  • the handle housing 16 is formed in a substantially U-shape open to the front side when viewed from the left side, and the main body housing 13 is formed in a substantially inverted L-shape when viewed from the side.
  • the upper end portion and the lower end side portion of the handle housing 16 are connected to the main body housing 13 by the vibration isolation mechanism 30 so as to be relatively movable in the front-rear direction. Specifically, at the rear end portion of the main body housing 13, a connecting portion 13A projecting to the rear side is formed at the upper end portion and the intermediate portion in the vertical direction, and the upper end portion and the lower end portion of the handle housing 16 are prevented. It is connected to the connecting portion 13A of the main body housing 13 by the shaking mechanism 30.
  • the position of the handle housing 16 shown in FIG. 2 is set as the initial position as the "first position", and the handle housing 16 is the initial position and the pushing position as the "second position" moved from the initial position to the front side. It is configured to be movable between (the position shown in FIG. 3) and.
  • the vibration isolation mechanism 30 will be described later. Further, in the following description, the handle housing 16 will be described as being arranged at the initial position.
  • the handle housing 16 is molded by two-color molding and has a two-layer structure of a layer made of a resin material and a layer made of an elastomer. Specifically, a layer of elastomer covers the surface of the resin material. Further, the handle housing 16 is divided into two in the left-right direction, and the handle housing 16 is formed by assembling the divided housings.
  • the rear end portion of the handle housing 16 is configured as a grip portion 16A gripped by an operator, and the grip portion 16A extends in the vertical direction.
  • a trigger 20 is provided at the upper end of the grip 16A.
  • a switching button 21 for switching the rotation direction of the motor 43, which will be described later, is provided on the upper side of the trigger 20, a switching button 21 for switching the rotation direction of the motor 43, which will be described later, is provided.
  • a switch mechanism 22 is provided on the rear side of the trigger 20.
  • the switch mechanism 22 has a switch (not shown) operated by the trigger 20 and the changeover button 21.
  • the switch is electrically connected to the control unit 90, which will be described later, and is configured to output an output signal to the control unit 90 according to the operation state of the trigger 20 and the switching state of the switching button 21.
  • the main body housing 13 includes a first main body housing portion 14 and a second main body housing portion 15.
  • the first main body housing portion 14 is configured as a housing portion for accommodating the transmission mechanism 50 described later, and is formed in a substantially cylindrical shape with the front-rear direction as the axial direction.
  • the second main body housing portion 15 is configured as a housing portion for accommodating the motor 43 described later, extends in the vertical direction, and is connected to the rear end portion of the first main body housing portion 14. Further, the second main body housing portion 15 is divided into two in the left-right direction, and the second main body housing portion 15 is formed by assembling the divided housings.
  • a speed change switch 23 is provided at the rear portion of the second main body housing portion 15 at an intermediate portion in the vertical direction. The speed change switch 23 is configured as a switch that switches the rotation speed of the motor 43 described later in multiple stages by being operated, and is electrically connected to the control unit 90 described later.
  • the lower end portion of the second main body housing portion 15 projects downward from the handle housing 16. That is, the rear lower corner portion of the housing 12 is cut out in a concave shape open to the rear side and the lower side, and the lower end portion of the handle housing 16 serves as a battery mounting portion 16B for mounting the battery pack 70 described later. It is configured. As shown in FIG. 8A, a pair of left and right housing-side rail portions 16C are formed on the battery mounting portion 16B, and the housing-side rail portions 16C extend in the front-rear direction and are rear-sided. It is formed in a substantially U-shape that is open inward in the left-right direction when viewed from the viewpoint.
  • an upwardly scooped portion 16D is formed at the rear end portion of the battery mounting portion 16B.
  • a pair of accommodating portions 16D1 are formed on the lower surface of the hollow portion 16D at both ends in the left-right direction (in FIG. 1, only the accommodating portion 16D1 on the left side is shown).
  • the accommodating portion 16D1 is formed in a concave shape that is open to the lower side and the outer side in the left-right direction.
  • a pair of left and right spacers 24 are provided in the accommodating portion 16D1 (only the left spacer 24 is shown in FIG. 1).
  • the spacer 24 is made of an elastic material such as rubber, and is formed in a substantially rectangular plate shape with the vertical direction as the thickness direction.
  • the upper surface of the spacer 24 is fixed to the top surface of the accommodating portion 16D1 so that the lower surface of the spacer 24 is arranged slightly below the lower surface of the hollowed portion 16D. Further, the battery mounting portion 16B is provided with a connector 25 (see FIG. 2) connected to the battery pack 70.
  • a guide insertion hole 15A is formed through the rear wall of the lower end portion of the second main body housing portion 15, and the guide insertion hole 15A is formed in the left-right direction. It is formed in a long hole shape in the longitudinal direction. Further, a pair of left and right guide pieces 15B (see FIG. 7B) are provided inside the second main body housing portion 15. The guide piece 15B projects from the rear wall of the second main body housing portion 15 to the front side on the lateral side of the guide insertion hole 15A in the vertical direction as the plate thickness direction.
  • a guide recess 15C is formed at the inner end of the guide piece 15B in the left-right direction, and the guide recess 15C is formed in a substantially trapezoidal shape that is open inward in the left-right direction in a plan view.
  • a handle guide 16E protruding forward is formed at a position corresponding to the guide insertion hole 15A.
  • the handle guide 16E is formed in a substantially rectangular plate shape with the vertical direction in the plate thickness direction, is inserted into the guide insertion hole 15A from the rear side, and is arranged inside the second main body housing portion 15. That is, the handle guide 16E is arranged between the pair of guide pieces 15B in the left-right direction.
  • the handle guide 16E and the guide piece 15B guide the movement of the lower end portion of the handle housing 16 in the front-rear direction.
  • the handle housing 16 is configured to suppress the lateral runout of the handle housing 16 by the handle guide 16E and the guide piece 15B.
  • guide protrusions 16F are formed at both ends of the handle guide 16E in the left-right direction at positions corresponding to the guide recesses 15C of the guide piece 15B.
  • the guide protrusion 16F projects outward from the handle guide 16E in the left-right direction, and is formed in a substantially trapezoidal shape in a plan view.
  • the length of the guide protrusion 16F in the front-rear direction is set shorter than the length of the guide recess 15C, and the guide protrusion 16F is arranged in the rear end portion of the guide recess 15C.
  • the guide protrusion 16F and the guide recess 15C limit the movement of the lower end portion of the handle housing 16 to the rear side at the initial position.
  • the guide protrusion 16F is set to be arranged in the front end portion of the guide recess 15C at the pushing position of the handle housing 16.
  • the guide protrusion 16F and the guide recess 15C are configured to limit the movement of the lower end portion of the handle housing 16 to the front side at the pushing position.
  • the anti-vibration mechanism 30 includes a damper portion 31 and a guide mechanism 32.
  • the damper portion 31 is composed of a part of an elastomer layer constituting the outer surface of the handle housing 16. Specifically, the upper end portion of the handle housing 16 and the portion of the elastomer that covers the connecting portion 13A of the main body housing 13 and connects the two constitutes the damper portion 31. Further, the damper portion 31 is formed in a substantially U-shaped cross section open to the outside of the upper end portion of the handle housing 16, and is connected to the connecting portion 13A of the main body housing 13.
  • the damper portion 31 is configured to be elastically deformable in the front-rear direction. That is, the damper portion 31 is elastically deformed in the front-rear direction, so that the handle housing 16 moves relative to the main body housing 13 in the front-rear direction. Further, at the initial position of the handle housing 16, the damper portion 31 is not elastically deformed, and at the pushing position of the handle housing 16, the damper portion 31 is set to be compressively deformed.
  • the guide mechanism 32 is configured as a mechanism that is bridged between the connecting portion 13A of the main body housing 13 and the upper end portion of the handle housing 16 to guide the relative movement of the handle housing 16 in the front-rear direction.
  • a plate accommodating portion 13B for accommodating the guide mechanism 32 is formed inside the connecting portion 13A, and the plate accommodating portion 13B has a substantially T-shaped concave shape that is open to the rear side in a side cross-sectional view. It is formed.
  • the plate accommodating portion 13B includes an accommodating main body portion 13B1 and an opening 13B2 communicating with the accommodating main body portion 13B1 and opening to the rear side.
  • a plate accommodating portion 16G for accommodating the guide mechanism 32 is also formed inside the upper end portion of the handle housing 16, and the plate accommodating portion 16G has a substantially T-shaped concave shape that is open to the front side in a side cross-sectional view. Is formed in.
  • the plate accommodating portion 16G includes an accommodating main body portion 16G1 and an opening 16G2 communicating with the accommodating main body portion 16G1 and opening to the front side.
  • the guide mechanism 32 includes a pair of upper and lower first guide plates 33 and a pair of front and rear second guide plates 34.
  • the pair of upper and lower first guide plates 33 are formed in a substantially U-shaped plate shape that is open outward in the vertical direction in a side view. That is, the upper first guide plate 33 is formed in a substantially U-shaped plate shape that is open to the upper side, and the lower first guide plate 33 is formed in a substantially U-shaped plate shape that is open to the lower side.
  • the pair of first guide plates 33 are fixed so as to overlap each other in the vertical direction.
  • the first guide plate 33 includes a plate main body 33A forming an intermediate portion in the front-rear direction of the first guide plate 33, and stopper portions 33B bent at both ends in the front-rear direction of the plate main body 33A. Has been done.
  • the stopper portion 33B of the first guide plate 33 is inserted into the accommodation main body 13B1 and the accommodation main body 16G1 so as to be relatively movable in the front-rear direction, and the plate main body 33A is relative to the opening 13B2 and the opening 16G2. It is inserted so that it can be moved. Further, the stopper portion 33B on the front side is arranged at the rear end portion of the accommodation main body portion 13B1, and the stopper portion 33B on the rear side is arranged at the front end portion of the accommodation main body portion 16G1.
  • the first guide plate 33 at the initial position of the handle housing 16 only the relative movement of the handle housing 16 to the front side (one side in the moving direction of the handle housing 16) is permitted.
  • the pair of front and rear second guide plates 34 are formed in a substantially U-shaped plate shape that is open inward in the front-rear direction in a plan view. That is, the second guide plate 34 on the front side is formed in a substantially U-shaped plate shape that is open to the rear side, and the second guide plate 34 on the rear side is formed in a substantially U-shape plate shape that is open to the front side.
  • the second guide plate 34 includes a plate main body 34A having a plate thickness direction in the front-rear direction and a pair of plate guide portions 34B bent at both ends in the left-right direction of the plate main body 33A. ing.
  • the second guide plate 34 on the front side (rear side) is housed in the plate accommodating portion 13B (plate accommodating portion 16G) and is configured to be integrally movable with the main body housing 13 (handle housing 16).
  • the front (rear) plate body 34A is arranged at the front end (rear end) of the accommodation body 13B1 (accommodation body 16G1), and the plate body 34A is the first guide plate 33. It is arranged so as to be separated from the stopper portion 33B in the front-rear direction.
  • the pair of left and right plate guide portions 34B are arranged so as to sandwich the plate main body 33A of the first guide plate 33 from the outside in the left-right direction, and the opening 13B2 of the plate accommodating portion 13B and the opening 16G2 of the plate accommodating portion 16G.
  • the movement of the plate guide portion 34B in the left-right direction is restricted by this.
  • the first guide plate 33 and the second guide plate 34 are configured to guide the movement of the handle housing 16 in the front-rear direction.
  • the plate body 34A of the second guide plate 34 is in contact with the stopper portion 33B of the first guide plate 33.
  • the main body housing 13 and the handle housing 16 are configured to suppress wear.
  • the inner cover 40 is formed in a substantially bottomed elliptical cylinder shape that is open to the front side.
  • the inner cover 40 is arranged inside the first main body housing portion 14, closes the opening on the rear end side of the first main body housing portion 14, and connects the first main body housing portion 14 and the second main body housing portion 15. It is attached to the first main body housing portion 14 so as to partition.
  • the first main body housing portion 14 and the inner cover 40 constitute an accommodating portion 41 accommodating the transmission mechanism 50 described later.
  • a cylinder support member 42 for supporting the cylinder 57, which will be described later, is fixed to the upper portion of the inner cover 40.
  • the cylinder support member 42 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction, and the front end portion of the cylinder support member 42 projects forward from the inner cover 40.
  • a motor support portion 40A for supporting the drive shaft 44 of the motor 43, which will be described later, is formed at the lower end portion of the inner cover 40.
  • the motor support portion 40A is formed in a substantially cylindrical shape with the vertical direction as the axial direction, and communicates with the inside of the inner cover 40.
  • the motor 43 is configured as a three-phase brushless motor and is housed in the second main body housing portion 15 of the housing 12.
  • the motor 43 includes a drive shaft 44 whose axial direction is the vertical direction, a substantially cylindrical rotor 45 fixed to the drive shaft 44, and a substantially cylindrical stator 46 arranged on the radial outer side of the rotor 45. It is configured to include.
  • the upper end side portion of the drive shaft 44 is rotatably supported by the bearing 47, and the bearing 47 is fixed to the motor support portion 40A of the inner cover 40.
  • the lower end of the drive shaft 44 is rotatably supported by the bearing 48, and the bearing 48 is fixed to the fixed wall 15D formed in the second main body housing portion 15.
  • the fixed wall 15D is formed in a substantially rectangular plate shape with the vertical direction as the plate thickness direction, and is also formed in a substantially U shape open upward when viewed from the left and right directions.
  • the upper end portion of the drive shaft 44 is arranged inside the accommodating portion 41, and the motor side bevel gear 44A is formed at the upper end portion of the drive shaft 44.
  • the stator 46 has a stator holder 46A, and a coil is wound around the stator holder 46A. Then, the motor 43 is electrically connected to the control unit 90, which will be described later.
  • a fan 49 is provided in a portion on the upper end side of the drive shaft 44 at a position below the bearing 47, and the fan 49 is integrally rotatably fixed to the drive shaft 44.
  • the fan 49 is configured as a so-called centrifugal fan, and is configured to allow air on the center side of the fan 49 to flow out in the radial direction.
  • the transmission mechanism 50 includes an intermediate shaft 51, a cylinder 57, a piston 64, a striking element 65, and a meson 66, and is arranged inside the accommodating portion 41. ..
  • the intermediate shaft 51 is formed in a substantially columnar shape with the front-rear direction as the axial direction, and is arranged below the accommodating portion 41.
  • the front end of the intermediate shaft 51 is rotatably supported by a bearing 52 fixed to the first main body housing portion 14, and the rear end of the intermediate shaft 51 is rotatably supported by a bearing 53 fixed to the inner cover 40. Is supported by.
  • a shaft-side bevel gear 54 is fixed to the rear end side portion of the intermediate shaft 51, and the shaft-side bevel gear 54 meshes with the motor-side bevel gear 44A of the motor 43. As a result, the motor 43 is driven to rotate the drive shaft 44, so that the intermediate shaft 51 rotates around its own shaft.
  • An intermediate gear portion 51A is formed on the outer peripheral portion of the front end side portion of the intermediate shaft 51.
  • a substantially cylindrical clutch 55 is extrapolated to the intermediate shaft 51 on the rear side of the intermediate gear portion 51A.
  • the clutch 55 is spline-fitted to the intermediate gear portion 51A. That is, the clutch 55 is connected so as to be relatively movable in the axial direction of the intermediate gear portion 51A and to be integrally rotatable with the intermediate gear portion 51A.
  • a meshing portion 55A is formed at the rear end portion of the clutch 55.
  • a clutch groove 55B is formed on the outer peripheral portion of the front end portion of the clutch 55, and the clutch groove 55B extends in the circumferential direction of the clutch 55 and is opened to the outside in the radial direction.
  • a motion conversion member 56 is rotatably extrapolated to the intermediate shaft 51 on the rear side of the clutch 55.
  • the motion conversion member 56 is configured as a member that converts the rotational motion of the intermediate shaft 51 to reciprocate the piston 64, which will be described later, in the front-rear direction.
  • a meshing portion 56A is formed at the front end portion of the motion conversion member 56. Then, the clutch 55 moves to the rear side, and the meshing portion 55A meshes with the meshing portion 56A, so that the clutch 55 and the motion conversion member 56 are connected, and the motion conversion member 56 is integrated with the intermediate shaft 51. It is configured to rotate to. Further, the motion conversion member 56 has an arm portion 56B extending upward.
  • the cylinder 57 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction, and is housed in the housing portion 41 on the upper side of the intermediate shaft 51.
  • the rear end portion of the cylinder 57 is rotatably supported by the bearing 58, and the bearing 58 is fixed to the inner peripheral portion of the cylinder support member 42.
  • the front end side portion of the cylinder 57 is rotatably supported by the bearing 59, and the bearing 59 is fixed to the first main body housing portion 14 via the support ring 60.
  • the cylinder 57 is formed in a substantially stepped cylindrical shape, and the inner diameter of the front end portion of the cylinder 57 is set to be smaller than the inner diameter of other portions.
  • a tool holding portion 62 is attached to the front end portion of the cylinder 57, and the rear end portion of the tip tool T extending in the front-rear direction is detachably fixed by the tool holding portion 62.
  • a flange 57A protruding outward in the radial direction is formed in the axially intermediate portion of the cylinder 57.
  • a ring-shaped cylinder gear 63 is provided on the front portion of the flange 57A.
  • An urging spring 67 configured as a compression coil spring is provided on the front side of the cylinder gear 63, and the urging spring 67 presses the cylinder gear 63 against the flange 57A so that the cylinder gear 63 can rotate integrally with the cylinder 57.
  • the cylinder gear 63 meshes with the intermediate gear portion 51A of the intermediate shaft 51. As a result, the intermediate shaft 51 is rotated by the driving force of the motor 43, so that the cylinder 57 and the tip tool T rotate around the axis of the cylinder 57.
  • the piston 64 is formed in a substantially bottomed cylindrical shape that is open to the front side, and is inserted into the rear portion of the cylinder 57 so as to be relatively movable in the front-rear direction.
  • a piston connecting portion 64A extending to the rear side is formed on the bottom wall of the piston 64, and the upper end portion of the arm portion 56B of the motion conversion member 56 is axially oriented in the left-right direction in the piston connecting portion 64A. It is rotatably connected. As a result, when the motion conversion member 56 rotates integrally with the intermediate shaft 51, the piston 64 reciprocates in the front-rear direction by the arm portion 56B.
  • the striking element 65 is formed in a substantially columnar shape with the front-rear direction as the axial direction, and is inserted inside the piston 64 so as to be relatively movable in the front-rear direction.
  • the space between the bottom wall of the piston 64 and the striking element 65 in the piston 64 is configured as the air chamber 64B.
  • a recess 65A opened to the front side is formed at a substantially central portion.
  • the meson 66 is formed in a substantially columnar shape with the front-rear direction as the axial direction, and is inserted into the front end portion of the cylinder 57 so as to be relatively movable in the front-rear direction. Further, the rear end portion of the meson 66 is arranged adjacent to the front side of the striking element 65 so as to be in contact with the inside of the recess 65A of the striking element 65. As a result, the piston 64 moves to the front side and the pressure in the air chamber 64B rises, so that the striking element 65 and the meson 66 move to the front side, and a striking force along the front-rear direction is applied to the tip tool T. It is configured to be.
  • the operating lever 68 is provided on the left wall of the first main body housing portion 14 of the hammer drill 10 so as to be rotatable, and is provided on the outside of the first main body housing portion 14. It is exposed so that it can be rotated.
  • the operating lever 68 has a hammer drill mode setting position shown by a solid line in FIG. 1 and a drill setting position rotated by approximately 90 degrees from the hammer drill mode setting position (position shown by a two-dot chain line in FIG. 1). It is configured to be rotatable between and.
  • the operation lever 68 is configured as a member for switching the transmission path of the transmission mechanism 50 to the tip tool T. Further, in the hammer drill 10, the tip tool T is pressed against the workpiece to apply a load to the workpiece (hereinafter, this state is referred to as a load state), and the workpiece is processed. ing. Specifically, the operator pushes the grip portion 16A of the handle housing 16 to the front side to process the workpiece. That is, the direction in which the handle housing 16 moves relative to the main body housing 13 and the pushing direction in which the handle housing 16 is pushed are the same.
  • the work piece is processed in a state where the handle housing 16 is relatively moved to the front side with respect to the main body housing 13 from the initial position (hereinafter, the state of the handle housing 16 is referred to as a pushed state). ..
  • the meshing portion 55A of the clutch 55 in the transmission mechanism 50 and the meshing portion 56A of the motion conversion member 56 mesh with each other, and the clutch 55 and the motion conversion member 56 engage with each other. It is configured to be connected.
  • the hammer drill 10 is set to the hammer drill mode, and the rotational force and the striking force of the transmission mechanism 50 are applied to the tip tool T.
  • the battery pack 70 is formed in a substantially rectangular parallelepiped shape.
  • the battery pack 70 is formed with connector portions 70A protruding upward, and battery-side rail portions 70B are formed at both ends of the connector portion 70A in the left-right direction.
  • the battery-side rail portion 70B is formed in a substantially inverted L-shape when viewed from the front side, extends in the front-rear direction, and is open to the front side. Then, the battery pack 70 is mounted on the battery mounting portion 16B of the housing 12 from the rear side, and the housing side rail portion 16C is slidably inserted into the battery side rail portion 70B in the front-rear direction (FIG. 8 (A). )reference).
  • the battery-side rail portion 70B is slidably engaged with the housing-side rail portion 16C in the front-rear direction. Further, when the battery pack 70 is attached to the battery mounting portion 16B, the connector portion 70A is connected to the connector 25, and power is supplied from the battery pack 70 to the control unit 90 described later.
  • a raised portion 70C that is raised upward is formed on the rear side of the connector portion 70A.
  • the raised portion 70C is arranged adjacent to the lower side of the spacer 24 (see FIG. 1).
  • the rear end portion of the battery pack 70 is arranged adjacent to the lower side of the spacer 24 in a state where there is substantially no gap between the spacer 24 and the raised portion 70C.
  • the raised portion 70C is provided with a pair of left and right lock members 71, and the lock members 71 are arranged on the left and right side portions of the battery pack 70.
  • the lock member 71 engages with the handle housing 16 to maintain the mounted state of the battery pack 70.
  • a pair of left and right protrusions 70D are formed on the front surface of the battery pack 70.
  • the protrusion 70D is formed in a substantially arc shape that is convex toward the front when viewed from above, and slightly protrudes from the front surface of the battery pack 70.
  • the battery pressing member 80 is made of an elastic material such as rubber.
  • the battery pressing member 80 has a base portion 81, and the base portion 81 is formed in a substantially rectangular plate shape having a thickness direction in the front-rear direction and a longitudinal direction in the left-right direction. Then, the base portion 81 is fixed to the second main body housing portion 15 on the lower side of the guide insertion hole 15A of the second main body housing portion 15 and on the front side of the lower portion of the battery pack 70.
  • a concave presser accommodating portion 15E opened to the rear side is formed on the rear wall of the lower end portion of the second main body housing portion 15.
  • the opening of the presser accommodating portion 15E is formed with a retaining portion 15F protruding inward of the presser accommodating portion 15E, and the retaining portion 15F is formed over the entire circumference of the opening of the presser accommodating portion 15E in the circumferential direction.
  • the base portion 81 is housed in the presser foot accommodating portion 15E, and the outer peripheral portion of the base portion 81 is sandwiched in the front-rear direction by the bottom surface of the presser foot accommodating portion 15E and the retaining portion 15F.
  • the battery holding member 80 is fixed to the second main body housing portion 15 on the front side of the battery pack 70 (the pushing direction side of the handle housing 16).
  • ribs 82A and 82B are formed at both ends in the left-right direction, respectively.
  • the pressing ribs 82A and 82B extend in the vertical direction, are arranged side by side in the horizontal direction, and project rearward from the opening of the pressing housing portion 15E. Further, the pressing ribs 82A and 82B are configured to be elastically deformable in the front-rear direction. Then, the upper end portion of the pressing rib 82A arranged on the outermost side in the left-right direction of the battery pressing member 80 is in contact with the protruding portion 70D of the battery pack 70.
  • the position of the rear end portion of the presser rib 82A in the front-rear direction and the position of the front end portion of the protrusion 70D coincide with each other, and the presser rib 82A is adjacent to the front side of the protrusion 70D without a gap. Have been placed.
  • the pressing ribs 82B arranged on the inner side in the left-right direction with respect to the pressing ribs 82A are arranged on the front side of the battery pack 70 with a slight gap.
  • the battery pressing member 80 pressing ribs 82A and 82B is configured as a member that presses the battery pack 70 from the pressing direction side in the pressed state of the handle housing 16.
  • the control unit 90 is provided at the lower end of the second main body housing unit 15.
  • the switch of the switch mechanism 22, the changeover button 21, the speed change switch 23, and the battery pack 70 described above are electrically connected to the control unit 90.
  • the motor 43 is driven by the control unit 90, and the driving force of the motor 43 is transmitted to the tip tool T by the transmission mechanism 50.
  • the rotation direction of the motor 43 is set according to the switching state of the changeover button 21, and the speed change switch 23 rotates at a rotation speed according to the operation position. It has become.
  • the operator grips the grip portion 16A of the hammer drill 10 with one hand and grips the battery pack 70 with the other hand. Further, the battery pack 70 is arranged below and behind the handle housing 16. Then, the vertical position of the battery side rail portion 70B of the battery pack 70 is aligned with the vertical position of the housing side rail portion 16C of the housing 12, the battery pack 70 is moved to the front side, and the housing side rail portion 16C is moved to the battery side rail portion. It is inserted inside the 70B. As a result, the battery pack 70 is slidably engaged with the handle housing 16 in the front-rear direction.
  • the battery pack 70 After inserting the housing-side rail portion 16C into the battery-side rail portion 70B, the battery pack 70 is moved forward along the housing-side rail portion 16C. Then, when the battery pack 70 reaches the mounting position, the lock member 71 engages with the handle housing 16 to restrict the movement of the battery pack 70 to the rear side. At this time, the protrusion 70D of the battery pack 70 is arranged adjacent to the rear side of the holding rib 82A of the battery holding member 80, and the raised portion 70C of the battery pack 70 is adjacent to the lower side of the spacer 24. Have been placed. This completes the installation of the battery pack 70.
  • the operator pushes the grip portion 16A of the hammer drill 10 forward and presses the tip tool T against the workpiece.
  • a load on the front side acts on the handle housing 16, and the vibration isolation mechanism 30 operates.
  • the damper portion 31 of the anti-vibration mechanism 30 is compressed and deformed, so that the handle housing 16 is displaced from the initial position to the pushing position side and relatively moves to the front side with respect to the main body housing 13.
  • the vibration generated when the motor 43 of the hammer drill 10 is operated is absorbed by the damper portion 31, and the vibration transmitted to the handle housing 16 is reduced.
  • the workability of the hammer drill 10 can be improved.
  • the battery pack 70 is mounted on the handle housing 16, when the handle housing 16 moves from the initial position to the pushing position side, the battery pack 70 also moves relative to the front side with respect to the main body housing 13. As a result, the battery pack 70 presses the pressing ribs 82A and 82B of the battery pressing member 80, and the pressing ribs 82A and 82B are compressed and deformed. Therefore, the vibration of the battery pack 70 when the hammer drill 10 is operated can be absorbed by the battery pressing members 80 (pressing ribs 82A and 82B). As a result, the mounted state of the battery pack 70 can be maintained satisfactorily.
  • the housing 12 includes the main body housing 13 and the handle housing 16, and the handle housing 16 is connected by the vibration isolation mechanism 30 so as to be relatively movable in the front-rear direction with respect to the main body housing 13.
  • the battery pack 70 is detachably attached to the battery mounting portion 16B of the handle housing 16, and the battery holding member 80 is provided in the main body housing 13. That is, in the housing 12, the housing portion on which the battery pack 70 is mounted and the housing portion provided with the battery holding member 80 are configured as separate housing portions, and both housing portions are configured to be relatively movable.
  • the battery holding member 80 is arranged between the battery pack 70 and the main body housing 13 (second main body housing portion 15). Specifically, the battery pressing member 80 is arranged on the front side (pushing direction side) with respect to the battery pack 70.
  • the battery pack 70 is not pressed by the battery pressing member 80 when the hammer drill 10 is not working (initial position of the handle housing 16), when the hammer drill 10 is working (the handle housing 16 is pushed in), the battery pack 70 is not pressed. Since the battery pack 70 presses the battery pressing member 80, the battery packing 70 can be pressed by the battery pressing member 80. As a result, it is possible to prevent the battery holding member 80 from being compressed and deformed when the battery pack 70 is attached. Therefore, the mounting load of the battery pack 70 can be reduced. Further, since the battery pack 70 is pressed by the battery pressing member 80 during the work of the hammer drill 10, the vibration of the battery pack 70 can be suppressed. As described above, the wearability of the battery pack 70 can be improved while suppressing the vibration of the battery pack 70.
  • the handle housing 16 moves from the initial position toward the pushing position side, the amount of compression deformation of the battery holding member 80 (holding ribs 82A and 82B) increases. Therefore, as the pushing force of the operator into the handle housing 16 increases, the reaction force acting on the battery pack 70 from the battery pressing members 80 (pressing ribs 82A and 82B) increases. As a result, the vibration of the battery pack 70 during the work of the hammer drill 10 can be effectively suppressed.
  • the protrusion 70D of the battery pack 70 is in contact with the holding rib 82A of the battery holding member 80.
  • the pressing rib 82A is arranged adjacent to the front side of the protrusion 70D in a state where the pressing rib 82A is not substantially compressed and deformed.
  • the rattling of the battery pack 70 in the front-rear direction at the initial position of the handle housing 16 can be suppressed by the holding rib 82A while suppressing the increase in the mounting load of the battery pack 70. That is, when the handle housing 16 is pushed forward by the operator, the holding rib 82A can be immediately compressed and deformed to hold the battery pack 70.
  • the battery pressing member 80 has a plurality of pressing ribs 82A and 82B protruding toward the battery pack 70 side. Therefore, the vibration transmitted to the battery pack 70 when the hammer drill 10 is operated can be effectively absorbed by the battery pressing members 80 (pressing ribs 82A and 82B). That is, for example, in the case where the pressing ribs 82A and 82B are omitted in the battery pressing member 80, the thickness of the base portion 81 is increased so that the battery pack 70 is pressed by the base portion 81 (hereinafter, the battery pressing member 80).
  • the battery presser member 80 of the comparative example has a higher spring property (spring constant) of the battery presser member 80.
  • the rear surface of the battery holding member 80 having a relatively high spring property receives the battery pack 70, so that the vibration of the motor 43 or the like is directly transmitted to the battery pack 70.
  • the absorption effect of the battery pressing member 80 on the vibration transmitted to the battery pack 70 may be reduced.
  • the battery pressing member 80 has a plurality of pressing ribs 82A and 82B protruding toward the battery pack 70 side.
  • the springiness of the battery pressing member 80 (pressing ribs 82A, 82B) can be made lower than that of the battery pressing member 80 of the above comparative example. Therefore, when the handle housing 16 is relatively moved to the front side with respect to the main body housing 13, the pressing ribs 82A and 82B can be satisfactorily compressed and deformed and pressed against the battery pack 70. As a result, the vibrations of the motor 43 and the like can be satisfactorily absorbed by the holding ribs 82A and 82B. Therefore, the vibration absorbing effect of the battery holding member 80 can be enhanced.
  • a pair of pressing ribs 82A and 82B are provided at both ends of the battery pressing member 80 in the left-right direction.
  • one pressing rib 82A is in contact with the protrusion 70D of the battery pack 70, and the other pressing rib 82B is separated from the front side of the battery pack 70 with a slight gap. Is arranged. Therefore, even if the handle housing 16 temporarily moves to the front side with respect to the main body housing 13 when the battery pack 70 is attached and the battery pack 70 comes into contact with the pressing ribs 82A and 82B, the pressing ribs 82A and 82B are compressed and deformed. The amount can be reduced as much as possible.
  • the handle housing 16 is configured to be movable relative to the main body housing 13 by the vibration isolation mechanism 30.
  • the anti-vibration mechanism 30 has a damper portion 31 that connects the handle housing 16 and the connecting portion 13A of the main body housing 13, and the damper portion 31 is a part of the layer formed by the elastomer of the handle housing 16. Consists of. Thereby, the handle housing 16 can be connected to the main body housing 13 so as to be relatively movable by utilizing the layer of the elastomer covering the surface of the handle housing 16.
  • the battery pack 70 has a battery-side rail portion 70B, and the battery-side rail portion 70B is slidably engaged with the housing-side rail portion 16C of the housing 12 in the front-rear direction.
  • the battery holding member 80 is arranged between the battery pack 70 and the second main body housing portion 15 of the housing 12 in the front-rear direction.
  • the battery holding member 80 is arranged on the front side (mounting direction side) of the battery pack 70. Therefore, it is possible to prevent the presser rib 82A of the battery presser member 80 from coming into contact with the battery pack 70 during the mounting of the battery pack 70 on the housing 12. That is, the holding rib 82A can be brought into contact with the battery pack 70 when the mounting of the battery pack 70 is completed. As a result, the mounting load of the battery pack 70 can be further reduced.
  • the anti-vibration mechanism 30 has a guide mechanism 32, and the relative movement of the handle housing 16 with respect to the main body housing 13 in the front-rear direction is guided by the guide mechanism 32. As a result, the handle housing 16 can be moved relative to the main body housing 13 in the front-rear direction by suppressing the left-right runout of the handle housing 16 when the hammer drill 10 is operated.
  • the anti-vibration mechanism 30 is provided at two locations, an upper end portion and a lower end portion of the handle housing 16. Thereby, when the hammer drill 10 is operated, the lower end portion of the handle housing 16 can be satisfactorily moved to the front side, and the pressing ribs 82A and 82B can be compressed and deformed by the battery pack 70. Therefore, the vibration of the battery pack 70 during the operation of the hammer drill 10 can be satisfactorily suppressed.
  • a spacer 24 is provided in the hollowed portion 16D of the handle housing 16, and the spacer 24 is in contact with the raised portion 70C of the battery pack 70. That is, the spacer 24 is in contact with the upper end of the rear side of the battery pack 70.
  • the vibration of the battery pack 70 when the hammer drill 10 is operated can be effectively suppressed. That is, when the handle housing 16 moves to the front side and the battery pack 70 presses the battery holding member 80, a reaction force to the rear side acts on the lower front side of the battery pack 70. Therefore, a counterclockwise rotational moment acts on the battery pack 70 when viewed from the left side. As a result, the raised portion 70C of the battery pack 70 tries to rotate so as to be displaced upward.
  • a spacer 24 is provided on the upper side of the raised portion 70C, and the spacer 24 is in contact with the raised portion 70C.
  • the raised portion 70C presses the spacer 24 upward, and the spacer 24 is compressed and deformed. That is, the battery pack 70 is sandwiched between the battery holding member 80 and the spacer 24. Therefore, the vibration of the battery pack 70 during the operation of the hammer drill 10 can be effectively suppressed.
  • the pressing ribs 82A are configured to come into contact with the protrusions 70D of the battery pack 70.
  • the pressing ribs 82A and 82B are attached to the battery pack 70 at the initial position. It may be configured to be separated from the front side.
  • the height of protrusion of the presser rib 82A from the base portion 81 may be lower than that of the present embodiment to leave a slight gap between the presser ribs 82A and 82B and the battery pack 70 in the front-rear direction. ..
  • the pressing ribs 82A and 82B abut on the battery pack 70 at the pushing position and are compressed and deformed. Also in this case, the mounting load of the battery pack 70 can be reduced, and the vibration of the battery pack 70 when the hammer drill 10 is operated can be suppressed.
  • a pair of pressing ribs 82A and 82B are formed at both ends of the battery pressing member 80 in the left-right direction. That is, although four pressing ribs are formed on the battery pressing member 80, the number of pressing ribs on the battery pressing member 80 can be arbitrarily set. For example, in the battery pressing member 80, five or more pressing ribs may be formed. In this case, the holding rib may be formed in the middle portion in the left-right direction of the battery holding member. Further, for example, in the battery pressing member 80, the pressing ribs 82A and 82B may be omitted, and the thickness of the battery pressing member 80 may be set so that the rear surface of the battery pressing member 80 comes into contact with the battery pack 70.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Portable Power Tools In General (AREA)

Abstract

The present invention improves mounting properties while suppressing vibration of a battery pack. In a housing 12 of a hammer drill 10, a handle housing 16 is linked to a body housing 13 by a vibration-preventing mechanism 30 so as to be capable of moving relative to the body housing 13. A battery pack 70 is removably mounted in the handle housing 16, and a battery pressing member 80 is provided to the body housing 13. The battery pressing member 80 is positioned on the forward side with respect to the battery pack 70. Therefore, even with a setting in which the battery pack 70 is not pressed by the battery pressing member 80 at an initial position of the handle housing 16, the battery pack 70 presses the battery pressing member 80 when the handle housing 16 is pushed in toward the forward side by a worker during working of the hammer drill 10, therefore making it possible for the battery pack 70 to be pressed by the battery pressing member 80.

Description

作業機Work machine
本発明は、作業機に関するものである。 The present invention relates to a working machine.
下記特許文献１に記載のハンマドリル（作業機）では、ハンマドリル本体とバッテリパックと有している。ハンマドリル本体は、ハンマドリル本体の外郭を構成するハウジングを有しており、ハウジングは、モータハウジング及びハンドルハウジングを含んで構成されている。そして、バッテリパックがハンドルハウジングに装着される構成になっている。 The hammer drill (working machine) described in Patent Document 1 below has a hammer drill main body and a battery pack. The hammer drill body has a housing that constitutes the outer shell of the hammer drill body, and the housing includes a motor housing and a handle housing. The battery pack is mounted on the handle housing.
また、ハンドルハウジングには、弾性体が設けられており、弾性体はバッテリパックの前側に配置されている。具体的には、弾性体が、ハンドルハウジング及びバッテリパックによって前後に圧縮変形している。これにより、例えば、ハンマドリルの作動時における、ハンマドリル本体に対するバッテリパックの振動等を抑制することができる。 Further, the handle housing is provided with an elastic body, and the elastic body is arranged on the front side of the battery pack. Specifically, the elastic body is compressed and deformed back and forth by the handle housing and the battery pack. Thereby, for example, it is possible to suppress the vibration of the battery pack with respect to the hammer drill body when the hammer drill is operated.
国際公開公報２０１９/００３７４２号International Publication No. 2019/003742
しかしながら、上記ハンマドリルでは、以下に示す点において改善の余地がある。すなわち、上記ハンマドリルでは、バッテリパックのハンドルハウジングへの装着状態では、弾性体が圧縮変形している。つまり、バッテリパックをハンドルハウジングへ装着するときには、弾性体を圧縮変形させつつ、バッテリパックを装着位置まで前側へスライドさせる必要がある。このため、バッテリパックを装着させるための荷重が高くなり、装着性が低下する可能性がある。 However, the hammer drill has room for improvement in the following points. That is, in the hammer drill, the elastic body is compressionally deformed when the battery pack is attached to the handle housing. That is, when mounting the battery pack on the handle housing, it is necessary to slide the battery pack forward to the mounting position while compressing and deforming the elastic body. Therefore, the load for mounting the battery pack becomes high, and the mountability may decrease.
本発明は、上記事実を考慮して、バッテリパックの振動を抑制しつつ、装着性を向上することができる作業機を提供することを目的とする。 In consideration of the above facts, an object of the present invention is to provide a working machine capable of improving wearability while suppressing vibration of a battery pack.
本発明の１又はそれ以上の実施形態は、モータと、前記モータを収容する本体部と、防振機構によって前記本体部に相対移動可能に連結されたハンドル部と、を含んで構成されたハウジングと、前記ハンドル部に着脱自在に装着され、前記モータに電力を供給するバッテリパックと、前記本体部に設けられ、前記バッテリパックと前記本体部との間に配置されると共に、前記ハンドル部が前記本体部に対して相対移動することで前記バッテリパックと当接して圧縮変形する弾性体と、を備えた作業機である。 One or more embodiments of the present invention include a motor, a main body for accommodating the motor, and a handle portion movably connected to the main body by an anti-vibration mechanism. A battery pack that is detachably attached to the handle portion and supplies electric power to the motor, and a battery pack that is provided in the main body portion and is arranged between the battery pack and the main body portion, and the handle portion is It is a working machine provided with an elastic body that comes into contact with the battery pack and is compressed and deformed by moving relative to the main body.
本発明の１又はそれ以上の実施形態は、前記ハンドル部は、第１位置と、前記第１位置から前記ハウジングに接近する第２位置と、の間で相対移動可能であり、前記ハンドル部が前記第１位置から前記第２位置へ移動することで、前記本体部及び前記バッテリパックによって圧縮される前記弾性体の圧縮量が増大する作業機である。 In one or more embodiments of the present invention, the handle portion is relatively movable between a first position and a second position that approaches the housing from the first position, and the handle portion is capable of moving relative to the first position. By moving from the first position to the second position, the amount of compression of the elastic body compressed by the main body and the battery pack is increased.
本発明の１又はそれ以上の実施形態は、前記第１位置において、前記弾性体が前記バッテリパックに当接している作業機である。 One or more embodiments of the present invention is a working machine in which the elastic body is in contact with the battery pack at the first position.
本発明の１又はそれ以上の実施形態は、前記第１位置において、前記弾性体が前記バッテリパックから離間している作業機である。 One or more embodiments of the present invention is a working machine in which the elastic body is separated from the battery pack at the first position.
本発明の１又はそれ以上の実施形態は、前記ハンドル部は、樹脂材により構成された層と、エラストマにより構成された層と、を有する２層構造を成しており、前記防振機構は、前記本体部と前記ハンドル部とを連結するダンパ部を有しており、前記ダンパ部が、前記エラストマにより構成された層の一部を構成している作業機である。 In one or more embodiments of the present invention, the handle portion has a two-layer structure including a layer made of a resin material and a layer made of an elastomer. A working machine having a damper portion that connects the main body portion and the handle portion, and the damper portion constitutes a part of a layer formed by the elastomer.
本発明の１又はそれ以上の実施形態は、前記ハンドル部は、前記本体部に対して第１方向に相対移動可能に構成されると共に、前記バッテリパックを前記第１方向にガイドするハウジング側レール部を有しており、前記バッテリパックは、第１方向一方側へ移動することで前記ハンドル部に装着され、前記弾性体が前記バッテリパックの第１方向一方側に隣接して配置されている作業機である。 In one or more embodiments of the present invention, the handle portion is configured to be movable relative to the main body portion in the first direction, and the housing side rail that guides the battery pack in the first direction. The battery pack has a portion, and the battery pack is attached to the handle portion by moving to one side in the first direction, and the elastic body is arranged adjacent to one side in the first direction of the battery pack. It is a working machine.
本発明の１又はそれ以上の実施形態は、前記防振機構は、前記ハンドル部の前記第１方向への移動をガイドするガイド機構を有している作業機である。 In one or more embodiments of the present invention, the anti-vibration mechanism is a working machine having a guide mechanism for guiding the movement of the handle portion in the first direction.
本発明の１又はそれ以上の実施形態は、前記防振機構は、２箇所設けられており、２箇所の前記防振機構が、前記第１方向と交差する第２方向に離間して配置されている作業機である。 In one or more embodiments of the present invention, the anti-vibration mechanism is provided at two locations, and the two anti-vibration mechanisms are arranged apart from each other in a second direction intersecting the first direction. It is a working machine.
本発明の１又はそれ以上の実施形態は、前記弾性体は、前記バッテリパック側へ突出した複数のリブを有しており、前記リブが、前記第１方向及び前記第２方向に交差する第３方向に並んで配置されると共に、前記弾性体の前記第３方向の両端部に形成されている作業機である。 In one or more embodiments of the present invention, the elastic body has a plurality of ribs protruding toward the battery pack, and the ribs intersect in the first direction and the second direction. It is a working machine that is arranged side by side in three directions and is formed at both ends of the elastic body in the third direction.
本発明の１又はそれ以上の実施形態は、前記弾性体の前記第３方向の両端部には、それぞれ一対の前記リブが形成されており、一対の前記リブの一方が、前記バッテリパックに当接し、一対の前記リブの他方が、前記バッテリパックから離間している作業機である。 In one or more embodiments of the present invention, a pair of the ribs are formed at both ends of the elastic body in the third direction, and one of the pair of ribs corresponds to the battery pack. A working machine that is in contact and the other of the pair of ribs is separated from the battery pack.
本発明の１又はそれ以上の実施形態によれば、バッテリパックの振動を抑制しつつ、装着性を向上することができる。 According to one or more embodiments of the present invention, wearability can be improved while suppressing vibration of the battery pack.
本実施の形態に係るハンマドリルを示す左側から見た側面図である。It is a side view seen from the left side which shows the hammer drill which concerns on this embodiment. 図１に示されるハンマドリルの内部を示す縦断面図である。It is a vertical cross-sectional view which shows the inside of the hammer drill shown in FIG. 図２に示されるハンマドリルのハンドルハウジングを初期位置から押込位置へ移動させた状態を示す縦断面図である。FIG. 3 is a vertical cross-sectional view showing a state in which the handle housing of the hammer drill shown in FIG. 2 is moved from the initial position to the pushing position. （Ａ）は、図２に示されるハンマドリルの防振機構を拡大して示す縦断面図（図２のａ部拡大断面図）であり、（Ｂ）は、（Ａ）に示される防振機構を示す上側から見た平断面図（図４（Ａ）の４Ｂ－４Ｂ線断面図）である。(A) is a vertical cross-sectional view (enlarged cross-sectional view of part a in FIG. 2) showing an enlarged vibration-proof mechanism of the hammer drill shown in FIG. 2, and (B) is a vibration-proof mechanism shown in (A). It is a plan sectional view (4B-4B line sectional view of FIG. 4A) seen from the upper side which shows. 図４（Ａ）に示される防振機構のガイド機構を示す斜視図である。It is a perspective view which shows the guide mechanism of the vibration isolation mechanism shown in FIG. 4A. （Ａ）は、図１に示されるハンマドリルのバッテリパックを示す前側から見た正面図であり、（Ｂ）は、（Ａ）のバッテリパックの左側から見た側面図である。(A) is a front view showing the battery pack of the hammer drill shown in FIG. 1 from the front side, and (B) is a side view seen from the left side of the battery pack of (A). （Ａ）は、図２に示されるハンマドリルの下端部を示す後側から見た断面図（図１の７Ａ－７Ａ線断面図）であり、（Ｂ）は、（Ａ）に示されるハンドルハウジングのハンドルガイドの第２ハウジング部への挿通状態を示す上側から見た平断面図（図７の７Ｂ－７Ｂ線断面図）である。(A) is a cross-sectional view (7A-7A line cross-sectional view of FIG. 1) seen from the rear side showing the lower end portion of the hammer drill shown in FIG. 2, and (B) is the handle housing shown in (A). It is a plan sectional view (7B-7B line sectional view of FIG. 7) seen from the upper side which shows the insertion state of the handle guide into the 2nd housing part. （Ａ）は、図１に示されるハンマドリルのバッテリパックとハンドルハウジングとの係合状態を示す後側から見た断面図（図１の８Ａ－８Ａ線断面図）であり、（Ｂ）は、図１に示されるハンマドリルのバッテリ押え部材とバッテリパックとの当接状態を示す下側から見た断面図（図１の８Ｂ－８Ｂ線断面図）である。FIG. 1A is a cross-sectional view (cross-sectional view taken along the line 8A-8A of FIG. 1) showing the engagement state between the battery pack of the hammer drill shown in FIG. 1 and the handle housing, and FIG. 1B is a cross-sectional view taken along the line 8A-8A of FIG. It is sectional drawing (8B-8B line sectional drawing of FIG. 1) seen from the lower side which shows the contact state between the battery holding member of the hammer drill shown in FIG. 1 and a battery pack. 図１に示されるハンマドリルの変形例におけるバッテリ押え部材とバッテリパックとの位置関係を示す図８（Ｂ）に対応する断面図である。It is sectional drawing corresponding to FIG. 8 (B) which shows the positional relationship between the battery holding member and the battery pack in the modification of the hammer drill shown in FIG.
以下、図面を用いて、本実施形態に係る「作業機」としてのハンマドリル１０について説明する。ハンマドリル１０は、被加工物に対して穴あけ加工等を行う工具として構成されている。なお、図面に適宜示される矢印ＵＰ、矢印ＦＲ、矢印ＬＨは、ハンマドリル１０の上側、前側、左側を示している。以下の説明において、上下、前後、左右の方向を用いて説明するときには、特に断りのない限り、ハンマドリル１０の上下方向、前後方向、左右方向を示すものとする。そして、前後方向が本発明の「第１方向」に対応し、上下方向が本発明の「第２方向」に対応し、左右方向が本発明の「第３方向」に対応する。また、前側が、本発明の「第１方向一方側」に対応する。 Hereinafter, the hammer drill 10 as a "working machine" according to the present embodiment will be described with reference to the drawings. The hammer drill 10 is configured as a tool for drilling or the like in a workpiece. The arrows UP, FR, and LH shown in the drawings indicate the upper side, the front side, and the left side of the hammer drill 10. In the following description, when the description uses the vertical, front-back, and left-right directions, the vertical direction, front-back direction, and left-right direction of the hammer drill 10 shall be indicated unless otherwise specified. The front-rear direction corresponds to the "first direction" of the present invention, the vertical direction corresponds to the "second direction" of the present invention, and the left-right direction corresponds to the "third direction" of the present invention. Further, the front side corresponds to the "one side in the first direction" of the present invention.
図１及び図２に示されるように、ハンマドリル１０は、ハウジング１２と、ハウジング１２内に収容された、インナカバー４０と、モータ４３と、モータ４３の駆動力を先端工具Ｔへ伝達する伝達機構５０と、バッテリパック７０と、「弾性体」としてのバッテリ押え部材８０と、モータ４３を駆動制御する制御部９０と、を含んで構成されている。また、ハンマドリル１０は、操作レバー６８を有しており、操作レバー６８が操作されることで、伝達機構５０における先端工具Ｔへの伝達経路が切替えられて、ハンマドリル１０が、先端工具Ｔに回転力を付与するドリルモード、又は、先端工具Ｔに回転力及び打撃力を付与するハンマドリルモードに切替わるように構成されている。以下、ハンマドリル１０の各構成について説明する。 As shown in FIGS. 1 and 2, the hammer drill 10 has a housing 12, an inner cover 40 housed in the housing 12, a motor 43, and a transmission mechanism for transmitting the driving force of the motor 43 to the tip tool T. It includes 50, a battery pack 70, a battery holding member 80 as an "elastic body", and a control unit 90 for driving and controlling a motor 43. Further, the hammer drill 10 has an operation lever 68, and when the operation lever 68 is operated, the transmission path to the tip tool T in the transmission mechanism 50 is switched, and the hammer drill 10 rotates to the tip tool T. It is configured to switch to a drill mode in which a force is applied or a hammer drill mode in which a rotational force and a striking force are applied to the tip tool T. Hereinafter, each configuration of the hammer drill 10 will be described.
（ハウジング１２について）　ハウジング１２は、中空状に形成されて、ハンマドリル１０の外郭を構成している。このハウジング１２は、ハウジング１２の前部を構成する「本体部」としての本体ハウジング１３と、ハウジング１２の後部を構成する「ハンドル部」としてのハンドルハウジング１６と、を有している。ハンドルハウジング１６は、左側から見た側面視で、前側へ開放された略Ｕ字形状に形成されており、本体ハウジング１３は、側面視で略逆Ｌ字形状に形成されている。 (About the housing 12) The housing 12 is formed in a hollow shape and constitutes the outer shell of the hammer drill 10. The housing 12 has a main body housing 13 as a "main body portion" constituting the front portion of the housing 12, and a handle housing 16 as a "handle portion" constituting the rear portion of the housing 12. The handle housing 16 is formed in a substantially U-shape open to the front side when viewed from the left side, and the main body housing 13 is formed in a substantially inverted L-shape when viewed from the side.
そして、ハンドルハウジング１６の上端部及び下端側部分が、防振機構３０によって、前後方向に相対移動可能に本体ハウジング１３に連結されている。具体的には、本体ハウジング１３の後端部には、上端部及び上下方向中間部において、後側へ突出した連結部１３Ａが形成されており、ハンドルハウジング１６の上端部及び下端部が、防振機構３０によって本体ハウジング１３の連結部１３Ａに連結されている。そして、図２に示されるハンドルハウジング１６の位置を「第１位置」としての初期位置としており、ハンドルハウジング１６は、初期位置と、初期位置から前側へ移動した「第２位置」としての押込位置（図３に示される位置）と、の間を移動可能に構成されている。なお、防振機構３０については、後述する。また、以下の説明では、ハンドルハウジング１６が初期位置に配置された状態として説明する。 The upper end portion and the lower end side portion of the handle housing 16 are connected to the main body housing 13 by the vibration isolation mechanism 30 so as to be relatively movable in the front-rear direction. Specifically, at the rear end portion of the main body housing 13, a connecting portion 13A projecting to the rear side is formed at the upper end portion and the intermediate portion in the vertical direction, and the upper end portion and the lower end portion of the handle housing 16 are prevented. It is connected to the connecting portion 13A of the main body housing 13 by the shaking mechanism 30. The position of the handle housing 16 shown in FIG. 2 is set as the initial position as the "first position", and the handle housing 16 is the initial position and the pushing position as the "second position" moved from the initial position to the front side. It is configured to be movable between (the position shown in FIG. 3) and. The vibration isolation mechanism 30 will be described later. Further, in the following description, the handle housing 16 will be described as being arranged at the initial position.
また、ハンドルハウジング１６は、２色成形によって成形されて、樹脂材によって構成された層と、エラストマによって構成された層と、の２層構造になっている。具体的には、エラストマの層が、樹脂材の表面を被覆している。また、ハンドルハウジング１６は、左右方向に２分割されており、分割されたハウジングを組付けることでハンドルハウジング１６が形成されている。 Further, the handle housing 16 is molded by two-color molding and has a two-layer structure of a layer made of a resin material and a layer made of an elastomer. Specifically, a layer of elastomer covers the surface of the resin material. Further, the handle housing 16 is divided into two in the left-right direction, and the handle housing 16 is formed by assembling the divided housings.
ハンドルハウジング１６の後端部は、作業者が把持する把持部１６Ａとして構成されており、把持部１６Ａは、上下方向に延在されている。把持部１６Ａの上端部には、トリガ２０が設けられている。また、トリガ２０の上側には、後述するモータ４３の回転方向を切替える切替ボタン２１が設けられている。さらに、トリガ２０の後側には、スイッチ機構２２が設けられている。スイッチ機構２２は、トリガ２０及び切替ボタン２１によって操作されるスイッチ（図示省略）を有している。当該スイッチは、後述する制御部９０に電気的に接続されており、トリガ２０の操作状態及び切替ボタン２１の切替状態に応じた出力信号を制御部９０に出力する構成になっている。 The rear end portion of the handle housing 16 is configured as a grip portion 16A gripped by an operator, and the grip portion 16A extends in the vertical direction. A trigger 20 is provided at the upper end of the grip 16A. Further, on the upper side of the trigger 20, a switching button 21 for switching the rotation direction of the motor 43, which will be described later, is provided. Further, a switch mechanism 22 is provided on the rear side of the trigger 20. The switch mechanism 22 has a switch (not shown) operated by the trigger 20 and the changeover button 21. The switch is electrically connected to the control unit 90, which will be described later, and is configured to output an output signal to the control unit 90 according to the operation state of the trigger 20 and the switching state of the switching button 21.
本体ハウジング１３は、第１本体ハウジング部１４と第２本体ハウジング部１５とを含んで構成されている。第１本体ハウジング部１４は、後述する伝達機構５０を収容するためのハウジング部として構成されて、前後方向を軸方向とした略円筒状に形成されている。第２本体ハウジング部１５は、後述するモータ４３を収容するためのハウジング部として構成され、上下方向に延在されて、第１本体ハウジング部１４の後端部に接続されている。また、第２本体ハウジング部１５は、左右方向に２分割されており、分割されたハウジングを組付けることで第２本体ハウジング部１５が形成されている。第２本体ハウジング部１５の後部には、上下方向中間部において、変速スイッチ２３が設けられている。変速スイッチ２３は、操作されることで、後述するモータ４３の回転数を多段に切替えるスイッチとして構成されており、後述する制御部９０に電気的に接続されている。 The main body housing 13 includes a first main body housing portion 14 and a second main body housing portion 15. The first main body housing portion 14 is configured as a housing portion for accommodating the transmission mechanism 50 described later, and is formed in a substantially cylindrical shape with the front-rear direction as the axial direction. The second main body housing portion 15 is configured as a housing portion for accommodating the motor 43 described later, extends in the vertical direction, and is connected to the rear end portion of the first main body housing portion 14. Further, the second main body housing portion 15 is divided into two in the left-right direction, and the second main body housing portion 15 is formed by assembling the divided housings. A speed change switch 23 is provided at the rear portion of the second main body housing portion 15 at an intermediate portion in the vertical direction. The speed change switch 23 is configured as a switch that switches the rotation speed of the motor 43 described later in multiple stages by being operated, and is electrically connected to the control unit 90 described later.
また、第２本体ハウジング部１５の下端部は、ハンドルハウジング１６よりも下側へ突出している。すなわち、ハウジング１２の後下の角部は、後側及び下側へ開放された凹状に切り欠かれており、ハンドルハウジング１６の下端部が、後述するバッテリパック７０を装着するバッテリ取付部１６Ｂとして構成されている。図８（Ａ）に示されるように、バッテリ取付部１６Ｂには、左右一対のハウジング側レール部１６Ｃが形成されており、ハウジング側レール部１６Ｃは、前後方向に延在されると共に、後側から見て左右方向内側へ開放された略Ｕ字形状に形成されている。 Further, the lower end portion of the second main body housing portion 15 projects downward from the handle housing 16. That is, the rear lower corner portion of the housing 12 is cut out in a concave shape open to the rear side and the lower side, and the lower end portion of the handle housing 16 serves as a battery mounting portion 16B for mounting the battery pack 70 described later. It is configured. As shown in FIG. 8A, a pair of left and right housing-side rail portions 16C are formed on the battery mounting portion 16B, and the housing-side rail portions 16C extend in the front-rear direction and are rear-sided. It is formed in a substantially U-shape that is open inward in the left-right direction when viewed from the viewpoint.
図１に示されるように、バッテリ取付部１６Ｂの後端部には、上側へ抉られた抉り部１６Ｄが形成されている。抉り部１６Ｄの下面には、左右方向両端部において、一対の収容部１６Ｄ１が形成されている（図１には、左側の収容部１６Ｄ１のみが図示されている）。収容部１６Ｄ１は、下側及び左右方向外側へ開放された凹状に形成されている。そして、収容部１６Ｄ１には、左右一対のスペーサ２４が設けられている（図１には、左側のスペーサ２４のみが図示されている）。スペーサ２４は、ゴムなどの弾性材によって構成されると共に、上下方向を厚み方向とする略矩形板状に形成されている。そして、スペーサ２４の下面が、抉り部１６Ｄの下面よりも若干下側に配置されるように、スペーサ２４の上面が収容部１６Ｄ１の頂面に固定されている。さらに、バッテリ取付部１６Ｂには、バッテリパック７０と接続されるコネクタ２５（図２参照）が設けられている。 As shown in FIG. 1, an upwardly scooped portion 16D is formed at the rear end portion of the battery mounting portion 16B. A pair of accommodating portions 16D1 are formed on the lower surface of the hollow portion 16D at both ends in the left-right direction (in FIG. 1, only the accommodating portion 16D1 on the left side is shown). The accommodating portion 16D1 is formed in a concave shape that is open to the lower side and the outer side in the left-right direction. A pair of left and right spacers 24 are provided in the accommodating portion 16D1 (only the left spacer 24 is shown in FIG. 1). The spacer 24 is made of an elastic material such as rubber, and is formed in a substantially rectangular plate shape with the vertical direction as the thickness direction. The upper surface of the spacer 24 is fixed to the top surface of the accommodating portion 16D1 so that the lower surface of the spacer 24 is arranged slightly below the lower surface of the hollowed portion 16D. Further, the battery mounting portion 16B is provided with a connector 25 (see FIG. 2) connected to the battery pack 70.
図７（Ａ）及び（Ｂ）に示されるように、第２本体ハウジング部１５の下端部の後壁には、ガイド挿通孔１５Ａが貫通形成されており、ガイド挿通孔１５Ａは、左右方向を長手方向とする長孔状に形成されている。さらに、第２本体ハウジング部１５の内部には、左右一対のガイド片１５Ｂ（図７（Ｂ）参照）が設けられている。ガイド片１５Ｂは、上下方向を板厚方向として、ガイド挿通孔１５Ａの左右方向外側において第２本体ハウジング部１５の後壁から前側へ突出している。ガイド片１５Ｂの左右方向内側端部には、ガイド凹部１５Ｃが形成されており、ガイド凹部１５Ｃは、平面視で左右方向内側へ開放された略台形状に形成されている。 As shown in FIGS. 7A and 7B, a guide insertion hole 15A is formed through the rear wall of the lower end portion of the second main body housing portion 15, and the guide insertion hole 15A is formed in the left-right direction. It is formed in a long hole shape in the longitudinal direction. Further, a pair of left and right guide pieces 15B (see FIG. 7B) are provided inside the second main body housing portion 15. The guide piece 15B projects from the rear wall of the second main body housing portion 15 to the front side on the lateral side of the guide insertion hole 15A in the vertical direction as the plate thickness direction. A guide recess 15C is formed at the inner end of the guide piece 15B in the left-right direction, and the guide recess 15C is formed in a substantially trapezoidal shape that is open inward in the left-right direction in a plan view.
一方、ハンドルハウジング１６の下端部には、ガイド挿通孔１５Ａに対応した位置において、前側へ突出したハンドルガイド１６Ｅが形成されている。ハンドルガイド１６Ｅは、上下方向を板厚方向とした略矩形プレート状に形成され、ガイド挿通孔１５Ａ内に後側から挿入されて、第２本体ハウジング部１５の内部に配置されている。すなわち、ハンドルガイド１６Ｅが、左右方向において一対のガイド片１５Ｂの間に配置されている。これにより、ハンドルハウジング１６の下端部における前後方向の移動をハンドルガイド１６Ｅ及びガイド片１５Ｂによって案内する構成になっている。換言すると、ハンドルハウジング１６の左右方向の振れを、ハンドルガイド１６Ｅ及びガイド片１５Ｂによって抑制する構成になっている。 On the other hand, at the lower end of the handle housing 16, a handle guide 16E protruding forward is formed at a position corresponding to the guide insertion hole 15A. The handle guide 16E is formed in a substantially rectangular plate shape with the vertical direction in the plate thickness direction, is inserted into the guide insertion hole 15A from the rear side, and is arranged inside the second main body housing portion 15. That is, the handle guide 16E is arranged between the pair of guide pieces 15B in the left-right direction. As a result, the handle guide 16E and the guide piece 15B guide the movement of the lower end portion of the handle housing 16 in the front-rear direction. In other words, the handle housing 16 is configured to suppress the lateral runout of the handle housing 16 by the handle guide 16E and the guide piece 15B.
また、ハンドルガイド１６Ｅの左右方向両端部には、ガイド片１５Ｂのガイド凹部１５Ｃに対応する位置において、ガイド突起１６Ｆが形成されている。ガイド突起１６Ｆは、ハンドルガイド１６Ｅから左右方向外側へ突出されると共に、平面視で略台形状に形成されている。また、前後方向におけるガイド突起１６Ｆの長さがガイド凹部１５Ｃの長さよりも短く設定されており、ガイド突起１６Ｆがガイド凹部１５Ｃの後端部内に配置されている。これにより、ガイド突起１６Ｆ及びガイド凹部１５Ｃによって、初期位置におけるハンドルハウジング１６の下端部の後側への移動を制限している。一方、図示は省略するが、ハンドルハウジング１６の押込位置では、ガイド突起１６Ｆがガイド凹部１５Ｃの前端部内に配置される設定になっている。これにより、ガイド突起１６Ｆ及びガイド凹部１５Ｃによって、押込位置におけるハンドルハウジング１６の下端部の前側への移動を制限する構成になっている。 Further, guide protrusions 16F are formed at both ends of the handle guide 16E in the left-right direction at positions corresponding to the guide recesses 15C of the guide piece 15B. The guide protrusion 16F projects outward from the handle guide 16E in the left-right direction, and is formed in a substantially trapezoidal shape in a plan view. Further, the length of the guide protrusion 16F in the front-rear direction is set shorter than the length of the guide recess 15C, and the guide protrusion 16F is arranged in the rear end portion of the guide recess 15C. As a result, the guide protrusion 16F and the guide recess 15C limit the movement of the lower end portion of the handle housing 16 to the rear side at the initial position. On the other hand, although not shown, the guide protrusion 16F is set to be arranged in the front end portion of the guide recess 15C at the pushing position of the handle housing 16. As a result, the guide protrusion 16F and the guide recess 15C are configured to limit the movement of the lower end portion of the handle housing 16 to the front side at the pushing position.
次に、上側の防振機構３０を用いて、防振機構３０の構成について説明する。図４及び図５に示されるように、防振機構３０は、ダンパ部３１と、ガイド機構３２と、を含んで構成されている。ダンパ部３１は、ハンドルハウジング１６の外表面を構成するエラストマの層の一部によって構成されている。具体的には、ハンドルハウジング１６の上端部及び本体ハウジング１３の連結部１３Ａを被覆し且つ両者を連結するエラストマの部位が、ダンパ部３１を構成している。また、ダンパ部３１は、ハンドルハウジング１６の上端部の外側へ開放された断面略Ｕ字形状に形成されて、本体ハウジング１３の連結部１３Ａと連結されている。これにより、ダンパ部３１は、前後方向に弾性変形可能に構成されている。すなわち、ダンパ部３１が前後方向に弾性変形することで、ハンドルハウジング１６が本体ハウジング１３に対して前後方向に相対移動する構成になっている。また、ハンドルハウジング１６の初期位置では、ダンパ部３１は弾性変形しておらず、ハンドルハウジング１６の押込位置では、ダンパ部３１が圧縮変形する設定になっている。 Next, the configuration of the vibration isolation mechanism 30 will be described using the vibration isolation mechanism 30 on the upper side. As shown in FIGS. 4 and 5, the anti-vibration mechanism 30 includes a damper portion 31 and a guide mechanism 32. The damper portion 31 is composed of a part of an elastomer layer constituting the outer surface of the handle housing 16. Specifically, the upper end portion of the handle housing 16 and the portion of the elastomer that covers the connecting portion 13A of the main body housing 13 and connects the two constitutes the damper portion 31. Further, the damper portion 31 is formed in a substantially U-shaped cross section open to the outside of the upper end portion of the handle housing 16, and is connected to the connecting portion 13A of the main body housing 13. As a result, the damper portion 31 is configured to be elastically deformable in the front-rear direction. That is, the damper portion 31 is elastically deformed in the front-rear direction, so that the handle housing 16 moves relative to the main body housing 13 in the front-rear direction. Further, at the initial position of the handle housing 16, the damper portion 31 is not elastically deformed, and at the pushing position of the handle housing 16, the damper portion 31 is set to be compressively deformed.
ガイド機構３２は、本体ハウジング１３の連結部１３Ａと、ハンドルハウジング１６の上端部と、の間に架け渡されて、ハンドルハウジング１６の前後方向の相対移動をガイドする機構として構成されている。ここで、連結部１３Ａの内部には、ガイド機構３２を収容するためのプレート収容部１３Ｂが形成されており、プレート収容部１３Ｂは、側断面視で後側へ開放された略Ｔ字形凹状に形成されている。具体的には、プレート収容部１３Ｂは、収容本体部１３Ｂ１と、収容本体部１３Ｂ１と連通し且つ後側へ開放された開口部１３Ｂ２と、を含んで構成されている。また、ハンドルハウジング１６の上端部の内部にも、ガイド機構３２を収容するためのプレート収容部１６Ｇが形成されており、プレート収容部１６Ｇは、側断面視で前側へ開放された略Ｔ字形凹状に形成されている。具体的には、プレート収容部１６Ｇは、収容本体部１６Ｇ１と、収容本体部１６Ｇ１と連通し且つ前側へ開放された開口部１６Ｇ２と、を含んで構成されている。 The guide mechanism 32 is configured as a mechanism that is bridged between the connecting portion 13A of the main body housing 13 and the upper end portion of the handle housing 16 to guide the relative movement of the handle housing 16 in the front-rear direction. Here, a plate accommodating portion 13B for accommodating the guide mechanism 32 is formed inside the connecting portion 13A, and the plate accommodating portion 13B has a substantially T-shaped concave shape that is open to the rear side in a side cross-sectional view. It is formed. Specifically, the plate accommodating portion 13B includes an accommodating main body portion 13B1 and an opening 13B2 communicating with the accommodating main body portion 13B1 and opening to the rear side. Further, a plate accommodating portion 16G for accommodating the guide mechanism 32 is also formed inside the upper end portion of the handle housing 16, and the plate accommodating portion 16G has a substantially T-shaped concave shape that is open to the front side in a side cross-sectional view. Is formed in. Specifically, the plate accommodating portion 16G includes an accommodating main body portion 16G1 and an opening 16G2 communicating with the accommodating main body portion 16G1 and opening to the front side.
そして、ガイド機構３２は、上下一対の第１ガイドプレート３３と、前後一対の第２ガイドプレート３４と、を含んで構成されている。上下一対の第１ガイドプレート３３は、側面視で上下方向外側へ開放された略Ｕ字形板状に形成されている。すなわち、上側の第１ガイドプレート３３は、上側へ開放された略Ｕ字形板状に形成され、下側の第１ガイドプレート３３は、下側へ開放された略Ｕ字形板状に形成されて、一対の第１ガイドプレート３３が、上下方向に重なる状態で固定されている。より詳しくは、第１ガイドプレート３３は、第１ガイドプレート３３の前後方向中間部を構成するプレート本体３３Ａと、プレート本体３３Ａの前後方向両端部において屈曲されたストッパ部３３Ｂと、を含んで構成されている。 The guide mechanism 32 includes a pair of upper and lower first guide plates 33 and a pair of front and rear second guide plates 34. The pair of upper and lower first guide plates 33 are formed in a substantially U-shaped plate shape that is open outward in the vertical direction in a side view. That is, the upper first guide plate 33 is formed in a substantially U-shaped plate shape that is open to the upper side, and the lower first guide plate 33 is formed in a substantially U-shaped plate shape that is open to the lower side. , The pair of first guide plates 33 are fixed so as to overlap each other in the vertical direction. More specifically, the first guide plate 33 includes a plate main body 33A forming an intermediate portion in the front-rear direction of the first guide plate 33, and stopper portions 33B bent at both ends in the front-rear direction of the plate main body 33A. Has been done.
そして、第１ガイドプレート３３のストッパ部３３Ｂが収容本体部１３Ｂ１及び収容本体部１６Ｇ１内に前後方向に相対移動可能に挿入されると共に、プレート本体３３Ａが、開口部１３Ｂ２及び開口部１６Ｇ２内に相対移動可能に挿入されている。また、前側のストッパ部３３Ｂは、収容本体部１３Ｂ１の後端部に配置され、後側のストッパ部３３Ｂが収容本体部１６Ｇ１の前端部に配置されている。これにより、ハンドルハウジング１６の初期位置において、本体ハウジング１３に対するハンドルハウジング１６の後側への相対移動を、第１ガイドプレート３３によって制限する構成になっている。すなわち、ハンドルハウジング１６の初期位置では、ハンドルハウジング１６の前側（ハンドルハウジング１６の移動方向一方側）への相対移動のみが許可される構成になっている。 Then, the stopper portion 33B of the first guide plate 33 is inserted into the accommodation main body 13B1 and the accommodation main body 16G1 so as to be relatively movable in the front-rear direction, and the plate main body 33A is relative to the opening 13B2 and the opening 16G2. It is inserted so that it can be moved. Further, the stopper portion 33B on the front side is arranged at the rear end portion of the accommodation main body portion 13B1, and the stopper portion 33B on the rear side is arranged at the front end portion of the accommodation main body portion 16G1. As a result, at the initial position of the handle housing 16, the relative movement of the handle housing 16 to the rear side with respect to the main body housing 13 is restricted by the first guide plate 33. That is, at the initial position of the handle housing 16, only the relative movement of the handle housing 16 to the front side (one side in the moving direction of the handle housing 16) is permitted.
前後一対の第２ガイドプレート３４は、平面視で、前後方向内側に開放された略Ｕ字形板状に形成されている。すなわち、前側の第２ガイドプレート３４は、後側へ開放された略Ｕ字形板状に形成され、後側の第２ガイドプレート３４は、前側へ開放された略Ｕ字形板状に形成されている。具体的には、第２ガイドプレート３４は、前後方向を板厚方向とするプレート本体３４Ａと、プレート本体３３Ａの左右方向両端部において屈曲された一対のプレートガイド部３４Ｂと、を含んで構成されている。 The pair of front and rear second guide plates 34 are formed in a substantially U-shaped plate shape that is open inward in the front-rear direction in a plan view. That is, the second guide plate 34 on the front side is formed in a substantially U-shaped plate shape that is open to the rear side, and the second guide plate 34 on the rear side is formed in a substantially U-shape plate shape that is open to the front side. There is. Specifically, the second guide plate 34 includes a plate main body 34A having a plate thickness direction in the front-rear direction and a pair of plate guide portions 34B bent at both ends in the left-right direction of the plate main body 33A. ing.
そして、前側（後側）の第２ガイドプレート３４が、プレート収容部１３Ｂ（プレート収容部１６Ｇ）内に収容されて、本体ハウジング１３（ハンドルハウジング１６）と一体移動可能に構成されている。具体的には、前側（後側）のプレート本体３４Ａが、収容本体部１３Ｂ１（収容本体部１６Ｇ１）の前端部（後端部）に配置されて、プレート本体３４Ａは、第１ガイドプレート３３のストッパ部３３Ｂと前後方向に離間して配置されている。また、左右一対のプレートガイド部３４Ｂが、第１ガイドプレート３３のプレート本体３３Ａを左右方向外側から挟み込むように配置されると共に、プレート収容部１３Ｂの開口部１３Ｂ２及びプレート収容部１６Ｇの開口部１６Ｇ２によってプレートガイド部３４Ｂの左右方向に移動が制限されている。これにより、第１ガイドプレート３３及び第２ガイドプレート３４によって、ハンドルハウジング１６の前後方向の移動をガイドするように構成されている。さらに、ハンドルハウジング１６の押込位置では、第２ガイドプレート３４のプレート本体３４Ａが第１ガイドプレート３３のストッパ部３３Ｂに当接する構成になっている。これにより、本体ハウジング１３及びハンドルハウジング１６の摩耗を抑制する構成になっている。 The second guide plate 34 on the front side (rear side) is housed in the plate accommodating portion 13B (plate accommodating portion 16G) and is configured to be integrally movable with the main body housing 13 (handle housing 16). Specifically, the front (rear) plate body 34A is arranged at the front end (rear end) of the accommodation body 13B1 (accommodation body 16G1), and the plate body 34A is the first guide plate 33. It is arranged so as to be separated from the stopper portion 33B in the front-rear direction. Further, the pair of left and right plate guide portions 34B are arranged so as to sandwich the plate main body 33A of the first guide plate 33 from the outside in the left-right direction, and the opening 13B2 of the plate accommodating portion 13B and the opening 16G2 of the plate accommodating portion 16G. The movement of the plate guide portion 34B in the left-right direction is restricted by this. As a result, the first guide plate 33 and the second guide plate 34 are configured to guide the movement of the handle housing 16 in the front-rear direction. Further, at the pushing position of the handle housing 16, the plate body 34A of the second guide plate 34 is in contact with the stopper portion 33B of the first guide plate 33. As a result, the main body housing 13 and the handle housing 16 are configured to suppress wear.
（インナカバー４０について）　図２に示されるように、インナカバー４０は、前側へ開放された略有底楕円筒状に形成されている。インナカバー４０は、第１本体ハウジング部１４の内部に配置されて、第１本体ハウジング部１４の後端側の開口部を閉塞し且つ第１本体ハウジング部１４と第２本体ハウジング部１５とを区画するように、第１本体ハウジング部１４に取付けられている。これにより、第１本体ハウジング部１４及びインナカバー４０によって、後述する伝達機構５０を収容する収容部４１が構成されている。 (About the inner cover 40) As shown in FIG. 2, the inner cover 40 is formed in a substantially bottomed elliptical cylinder shape that is open to the front side. The inner cover 40 is arranged inside the first main body housing portion 14, closes the opening on the rear end side of the first main body housing portion 14, and connects the first main body housing portion 14 and the second main body housing portion 15. It is attached to the first main body housing portion 14 so as to partition. As a result, the first main body housing portion 14 and the inner cover 40 constitute an accommodating portion 41 accommodating the transmission mechanism 50 described later.
インナカバー４０の上部には、後述するシリンダ５７を支持するためのシリンダ支持部材４２が固定されている。シリンダ支持部材４２は、前後方向を軸方向とした略円筒状に形成されており、シリンダ支持部材４２の前端部が、インナカバー４０よりも前側へ突出している。また、インナカバー４０の下端部には、後述するモータ４３の駆動軸４４を支持するためのモータ支持部４０Ａが形成されている。モータ支持部４０Ａは、上下方向を軸方向とする略円筒状に形成されて、インナカバー４０の内部と連通している。 A cylinder support member 42 for supporting the cylinder 57, which will be described later, is fixed to the upper portion of the inner cover 40. The cylinder support member 42 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction, and the front end portion of the cylinder support member 42 projects forward from the inner cover 40. Further, a motor support portion 40A for supporting the drive shaft 44 of the motor 43, which will be described later, is formed at the lower end portion of the inner cover 40. The motor support portion 40A is formed in a substantially cylindrical shape with the vertical direction as the axial direction, and communicates with the inside of the inner cover 40.
（モータ４３について）　モータ４３は、３相のブラシレスモータとして構成されて、ハウジング１２の第２本体ハウジング部１５内に収容されている。モータ４３は、上下方向を軸方向とする駆動軸４４と、駆動軸４４に固定された略円筒状のロータ４５と、ロータ４５の径方向外側に配置された略円筒状のステータ４６と、を含んで構成されている。駆動軸４４の上端側の部分は、軸受４７に回転可能に支持されており、軸受４７は、インナカバー４０のモータ支持部４０Ａに固定されている。駆動軸４４の下端部は、軸受４８に回転可能に支持されており、軸受４８は、第２本体ハウジング部１５に形成された固定壁１５Ｄに固定されている。この固定壁１５Ｄは、上下方向を板厚方向とする略矩形板状に形成されると共に、左右方向から見て、上側へ開放された略Ｕ字形状に形成されている。駆動軸４４の上端部は、収容部４１の内部に配置されており、駆動軸４４の上端部には、モータ側ベベルギヤ４４Ａが形成されている。ステータ４６は、ステータホルダ４６Ａを有しており、ステータホルダ４６Ａにはコイルが巻き回されている。そして、モータ４３が、後述する制御部９０に電気的に接続されている。 (About the motor 43) The motor 43 is configured as a three-phase brushless motor and is housed in the second main body housing portion 15 of the housing 12. The motor 43 includes a drive shaft 44 whose axial direction is the vertical direction, a substantially cylindrical rotor 45 fixed to the drive shaft 44, and a substantially cylindrical stator 46 arranged on the radial outer side of the rotor 45. It is configured to include. The upper end side portion of the drive shaft 44 is rotatably supported by the bearing 47, and the bearing 47 is fixed to the motor support portion 40A of the inner cover 40. The lower end of the drive shaft 44 is rotatably supported by the bearing 48, and the bearing 48 is fixed to the fixed wall 15D formed in the second main body housing portion 15. The fixed wall 15D is formed in a substantially rectangular plate shape with the vertical direction as the plate thickness direction, and is also formed in a substantially U shape open upward when viewed from the left and right directions. The upper end portion of the drive shaft 44 is arranged inside the accommodating portion 41, and the motor side bevel gear 44A is formed at the upper end portion of the drive shaft 44. The stator 46 has a stator holder 46A, and a coil is wound around the stator holder 46A. Then, the motor 43 is electrically connected to the control unit 90, which will be described later.
駆動軸４４の上端側の部分には、軸受４７の下側の位置において、ファン４９が設けられており、ファン４９は、駆動軸４４に一体回転可能に固定されている。このファン４９は、所謂遠心ファンとして構成されており、ファン４９の中央側の空気を径方向外側へ流出させるように構成されている。 A fan 49 is provided in a portion on the upper end side of the drive shaft 44 at a position below the bearing 47, and the fan 49 is integrally rotatably fixed to the drive shaft 44. The fan 49 is configured as a so-called centrifugal fan, and is configured to allow air on the center side of the fan 49 to flow out in the radial direction.
（伝達機構５０について）　伝達機構５０は、中間軸５１と、シリンダ５７と、ピストン６４と、打撃子６５と、中間子６６と、を含んで構成されて、収容部４１の内部に配置されている。 (Regarding the transmission mechanism 50) The transmission mechanism 50 includes an intermediate shaft 51, a cylinder 57, a piston 64, a striking element 65, and a meson 66, and is arranged inside the accommodating portion 41. ..
＜中間軸５１について＞　中間軸５１は、前後方向を軸方向とした略円柱状に形成されて、収容部４１の下部に配置されている。中間軸５１の前端部は、第１本体ハウジング部１４に固定された軸受５２に回転可能に支持されており、中間軸５１の後端部は、インナカバー４０に固定された軸受５３に回転可能に支持されている。中間軸５１の後端側部分には、軸側ベベルギヤ５４が固定されており、軸側ベベルギヤ５４は、モータ４３のモータ側ベベルギヤ４４Ａに噛合している。これにより、モータ４３が駆動して駆動軸４４が回転することで、中間軸５１が自身の軸回りに回転する構成になっている。 <About the intermediate shaft 51> The intermediate shaft 51 is formed in a substantially columnar shape with the front-rear direction as the axial direction, and is arranged below the accommodating portion 41. The front end of the intermediate shaft 51 is rotatably supported by a bearing 52 fixed to the first main body housing portion 14, and the rear end of the intermediate shaft 51 is rotatably supported by a bearing 53 fixed to the inner cover 40. Is supported by. A shaft-side bevel gear 54 is fixed to the rear end side portion of the intermediate shaft 51, and the shaft-side bevel gear 54 meshes with the motor-side bevel gear 44A of the motor 43. As a result, the motor 43 is driven to rotate the drive shaft 44, so that the intermediate shaft 51 rotates around its own shaft.
中間軸５１の前端側部分における外周部には、中間ギヤ部５１Ａが形成されている。また、中間軸５１には、中間ギヤ部５１Ａの後側において、略円筒状のクラッチ５５が外挿されている。クラッチ５５は、中間ギヤ部５１Ａにスプライン嵌合されている。すなわち、クラッチ５５が、中間ギヤ部５１Ａの軸方向に相対移動可能に且つ中間ギヤ部５１Ａと一体回転可能に連結されている。クラッチ５５の後端部には、噛合い部５５Ａが形成されている。また、クラッチ５５の前端部の外周部には、クラッチ溝５５Ｂが形成されており、クラッチ溝５５Ｂは、クラッチ５５の周方向に延在され且つ径方向外側へ開放されている。 An intermediate gear portion 51A is formed on the outer peripheral portion of the front end side portion of the intermediate shaft 51. Further, a substantially cylindrical clutch 55 is extrapolated to the intermediate shaft 51 on the rear side of the intermediate gear portion 51A. The clutch 55 is spline-fitted to the intermediate gear portion 51A. That is, the clutch 55 is connected so as to be relatively movable in the axial direction of the intermediate gear portion 51A and to be integrally rotatable with the intermediate gear portion 51A. A meshing portion 55A is formed at the rear end portion of the clutch 55. Further, a clutch groove 55B is formed on the outer peripheral portion of the front end portion of the clutch 55, and the clutch groove 55B extends in the circumferential direction of the clutch 55 and is opened to the outside in the radial direction.
中間軸５１には、クラッチ５５の後側において、運動変換部材５６が回転可能に外挿されている。運動変換部材５６は、中間軸５１の回転運動を変換して、後述するピストン６４を前後方向へ往復移動させる部材として構成されている。運動変換部材５６の前端部には、噛合い部５６Ａが形成されている。そして、クラッチ５５が後側へ移動して、噛合い部５５Ａが噛合い部５６Ａに噛合うことで、クラッチ５５と運動変換部材５６とが連結して、運動変換部材５６が中間軸５１と一体に回転する構成になっている。また、運動変換部材５６は、上方側へ延出されたアーム部５６Ｂを有している。 A motion conversion member 56 is rotatably extrapolated to the intermediate shaft 51 on the rear side of the clutch 55. The motion conversion member 56 is configured as a member that converts the rotational motion of the intermediate shaft 51 to reciprocate the piston 64, which will be described later, in the front-rear direction. A meshing portion 56A is formed at the front end portion of the motion conversion member 56. Then, the clutch 55 moves to the rear side, and the meshing portion 55A meshes with the meshing portion 56A, so that the clutch 55 and the motion conversion member 56 are connected, and the motion conversion member 56 is integrated with the intermediate shaft 51. It is configured to rotate to. Further, the motion conversion member 56 has an arm portion 56B extending upward.
＜シリンダ５７について＞　シリンダ５７は、前後方向を軸方向とする略円筒状に形成されて、中間軸５１の上側において収容部４１内に収容されている。シリンダ５７の後端部は、軸受５８に回転可能に支持されており、軸受５８は、シリンダ支持部材４２の内周部に固定されている。一方、シリンダ５７の前端側部分は、軸受５９に回転可能に支持されており、軸受５９は、第１本体ハウジング部１４に支持リング６０を介して固定されている。また、シリンダ５７は、略段付き円筒状に形成されており、シリンダ５７の前端部の内径が、他の部分の内径よりも小さく設定されている。シリンダ５７の前端部には、工具保持部６２が取付けられており、工具保持部６２によって、前後方向に延在された先端工具Ｔの後端部が着脱可能に固定されている。 <Cylinder 57> The cylinder 57 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction, and is housed in the housing portion 41 on the upper side of the intermediate shaft 51. The rear end portion of the cylinder 57 is rotatably supported by the bearing 58, and the bearing 58 is fixed to the inner peripheral portion of the cylinder support member 42. On the other hand, the front end side portion of the cylinder 57 is rotatably supported by the bearing 59, and the bearing 59 is fixed to the first main body housing portion 14 via the support ring 60. Further, the cylinder 57 is formed in a substantially stepped cylindrical shape, and the inner diameter of the front end portion of the cylinder 57 is set to be smaller than the inner diameter of other portions. A tool holding portion 62 is attached to the front end portion of the cylinder 57, and the rear end portion of the tip tool T extending in the front-rear direction is detachably fixed by the tool holding portion 62.
シリンダ５７の軸方向中間部には、径方向外側へ突出したフランジ５７Ａが形成されている。フランジ５７Ａの前部には、リング状のシリンダギヤ６３が設けられている。シリンダギヤ６３の前側には、圧縮コイルスプリングとして構成された付勢バネ６７が設けられており、付勢バネ６７によって、シリンダギヤ６３が、フランジ５７Ａに押し付けられて、シリンダ５７と一体回転可能に構成されている。また、シリンダギヤ６３は、中間軸５１の中間ギヤ部５１Ａに噛合している。これにより、モータ４３の駆動力によって中間軸５１が回転することで、シリンダ５７及び先端工具Ｔがシリンダ５７の軸回りに回転する構成になっている。 A flange 57A protruding outward in the radial direction is formed in the axially intermediate portion of the cylinder 57. A ring-shaped cylinder gear 63 is provided on the front portion of the flange 57A. An urging spring 67 configured as a compression coil spring is provided on the front side of the cylinder gear 63, and the urging spring 67 presses the cylinder gear 63 against the flange 57A so that the cylinder gear 63 can rotate integrally with the cylinder 57. ing. Further, the cylinder gear 63 meshes with the intermediate gear portion 51A of the intermediate shaft 51. As a result, the intermediate shaft 51 is rotated by the driving force of the motor 43, so that the cylinder 57 and the tip tool T rotate around the axis of the cylinder 57.
＜ピストン６４について＞　ピストン６４は、前側へ開放された略有底円筒状に形成されて、シリンダ５７の後部内に前後方向に相対移動可能に挿入されている。ピストン６４の底壁には、後側へ延出されたピストン連結部６４Ａが形成されており、ピストン連結部６４Ａには、運動変換部材５６におけるアーム部５６Ｂの上端部が左右方向を軸方向として回転可能に連結されている。これにより、運動変換部材５６が中間軸５１と一体に回転するときには、アーム部５６Ｂによってピストン６４が前後方向に往復移動する構成になっている。 <About the piston 64> The piston 64 is formed in a substantially bottomed cylindrical shape that is open to the front side, and is inserted into the rear portion of the cylinder 57 so as to be relatively movable in the front-rear direction. A piston connecting portion 64A extending to the rear side is formed on the bottom wall of the piston 64, and the upper end portion of the arm portion 56B of the motion conversion member 56 is axially oriented in the left-right direction in the piston connecting portion 64A. It is rotatably connected. As a result, when the motion conversion member 56 rotates integrally with the intermediate shaft 51, the piston 64 reciprocates in the front-rear direction by the arm portion 56B.
＜打撃子６５について＞　打撃子６５は、前後方向を軸方向とする略円柱状に形成されて、ピストン６４の内部に前後方向に相対移動可能に挿入されている。そして、ピストン６４内におけるピストン６４の底壁と打撃子６５との間の空間が、空気室６４Ｂとして構成されている。また、打撃子６５の前面には、略中心部において、前側へ開放された凹部６５Ａが形成されている。 <About the striking element 65> The striking element 65 is formed in a substantially columnar shape with the front-rear direction as the axial direction, and is inserted inside the piston 64 so as to be relatively movable in the front-rear direction. The space between the bottom wall of the piston 64 and the striking element 65 in the piston 64 is configured as the air chamber 64B. Further, on the front surface of the striking element 65, a recess 65A opened to the front side is formed at a substantially central portion.
＜中間子６６について＞　中間子６６は、前後方向を軸方向とする略円柱状に形成されて、シリンダ５７の前端部内に前後方向に相対移動可能に挿入されている。また、中間子６６の後端部は、打撃子６５の凹部６５Ａの内部と当接可能に、打撃子６５の前側に隣接して配置されている。これにより、ピストン６４が前側へ移動して空気室６４Ｂ内の圧力が上昇することで、打撃子６５及び中間子６６が前側へ移動して、前後方向に沿った打撃力が先端工具Ｔに付与される構成になっている。 <About the meson 66> The meson 66 is formed in a substantially columnar shape with the front-rear direction as the axial direction, and is inserted into the front end portion of the cylinder 57 so as to be relatively movable in the front-rear direction. Further, the rear end portion of the meson 66 is arranged adjacent to the front side of the striking element 65 so as to be in contact with the inside of the recess 65A of the striking element 65. As a result, the piston 64 moves to the front side and the pressure in the air chamber 64B rises, so that the striking element 65 and the meson 66 move to the front side, and a striking force along the front-rear direction is applied to the tip tool T. It is configured to be.
（操作レバー６８について）　図１に示されるように、操作レバー６８は、ハンマドリル１０の第１本体ハウジング部１４の左壁に回動操作可能に設けられると共に、第１本体ハウジング部１４の外側に回転操作可能に露出されている。具体的には、操作レバー６８が、図１において実線にて示されるハンマドリルモード設定位置と、ハンマドリルモード設定位置から略９０度回転したドリル設定位置（図１において２点鎖線にて示される位置）と、の間を回転可能に構成されている。 (Regarding the operating lever 68) As shown in FIG. 1, the operating lever 68 is provided on the left wall of the first main body housing portion 14 of the hammer drill 10 so as to be rotatable, and is provided on the outside of the first main body housing portion 14. It is exposed so that it can be rotated. Specifically, the operating lever 68 has a hammer drill mode setting position shown by a solid line in FIG. 1 and a drill setting position rotated by approximately 90 degrees from the hammer drill mode setting position (position shown by a two-dot chain line in FIG. 1). It is configured to be rotatable between and.
操作レバー６８は、伝達機構５０の先端工具Ｔへの伝達経路を切替える部材として構成されている。また、ハンマドリル１０では、先端工具Ｔを被加工物に押し付けて、被加工物に負荷を付与した状態（以下、この状態を負荷状態という）で、被加工物に対して加工を行うようになっている。具体的には、作業者がハンドルハウジング１６の把持部１６Ａを前側へ押込んで、被加工物に対する加工を行うようになっている。すなわち、ハンドルハウジング１６が本体ハウジング１３に対して相対移動する方向と、ハンドルハウジング１６が押込まれる押込方向と、が一致している。これにより、ハンドルハウジング１６が初期位置から本体ハウジング１３に対して前側へ相対移動した状態（以下、このハンドルハウジング１６の状態を押込状態という）で、被加工物に対する加工を行う構成になっている。 The operation lever 68 is configured as a member for switching the transmission path of the transmission mechanism 50 to the tip tool T. Further, in the hammer drill 10, the tip tool T is pressed against the workpiece to apply a load to the workpiece (hereinafter, this state is referred to as a load state), and the workpiece is processed. ing. Specifically, the operator pushes the grip portion 16A of the handle housing 16 to the front side to process the workpiece. That is, the direction in which the handle housing 16 moves relative to the main body housing 13 and the pushing direction in which the handle housing 16 is pushed are the same. As a result, the work piece is processed in a state where the handle housing 16 is relatively moved to the front side with respect to the main body housing 13 from the initial position (hereinafter, the state of the handle housing 16 is referred to as a pushed state). ..
そして、操作レバー６８のドリルモード設定位置における負荷状態では、伝達機構５０におけるクラッチ５５と運動変換部材５６との非連結状態が維持される構成になっている。これにより、ハンマドリル１０がドリルモードになり、伝達機構５０によって先端工具Ｔに回転力のみが付与される構成になっている。 In the load state of the operation lever 68 at the drill mode setting position, the disengagement state of the clutch 55 and the motion conversion member 56 in the transmission mechanism 50 is maintained. As a result, the hammer drill 10 is set to the drill mode, and only the rotational force is applied to the tip tool T by the transmission mechanism 50.
一方、操作レバー６８のハンマドリルモード設定位置における負荷状態では、伝達機構５０におけるクラッチ５５の噛合い部５５Ａと運動変換部材５６の噛合い部５６Ａとが噛合い、クラッチ５５と運動変換部材５６とが連結する構成になっている。これにより、ハンマドリル１０がハンマドリルモードになり、伝達機構５０による回転力及び打撃力が先端工具Ｔに付与される構成になっている。 On the other hand, in the load state at the hammer drill mode setting position of the operating lever 68, the meshing portion 55A of the clutch 55 in the transmission mechanism 50 and the meshing portion 56A of the motion conversion member 56 mesh with each other, and the clutch 55 and the motion conversion member 56 engage with each other. It is configured to be connected. As a result, the hammer drill 10 is set to the hammer drill mode, and the rotational force and the striking force of the transmission mechanism 50 are applied to the tip tool T.
（バッテリパック７０）　図１、図６、及び図８示されるように、バッテリパック７０は、略直方体に形成されている。バッテリパック７０には、上側へ突出したコネクタ部７０Ａが形成されており、コネクタ部７０Ａの左右方向両端部には、バッテリ側レール部７０Ｂが形成されている。バッテリ側レール部７０Ｂは、前側から見て略逆Ｌ字型状に形成され、前後方向に延在されると共に、前側へ開放されている。そして、バッテリパック７０が、ハウジング１２のバッテリ取付部１６Ｂに後側から装着されて、ハウジング側レール部１６Ｃがバッテリ側レール部７０Ｂ内に前後方向にスライド可能に挿入されている（図８（Ａ）参照）。換言すると、バッテリ側レール部７０Ｂが、ハウジング側レール部１６Ｃに前後方向にスライド可能に係合されている。さらに、バッテリパック７０のバッテリ取付部１６Ｂへの装着状態では、コネクタ部７０Ａがコネクタ２５に接続されて、バッテリパック７０から後述する制御部９０へ電力が供給される構成になっている。 (Battery pack 70) As shown in FIGS. 1, 6, and 8, the battery pack 70 is formed in a substantially rectangular parallelepiped shape. The battery pack 70 is formed with connector portions 70A protruding upward, and battery-side rail portions 70B are formed at both ends of the connector portion 70A in the left-right direction. The battery-side rail portion 70B is formed in a substantially inverted L-shape when viewed from the front side, extends in the front-rear direction, and is open to the front side. Then, the battery pack 70 is mounted on the battery mounting portion 16B of the housing 12 from the rear side, and the housing side rail portion 16C is slidably inserted into the battery side rail portion 70B in the front-rear direction (FIG. 8 (A). )reference). In other words, the battery-side rail portion 70B is slidably engaged with the housing-side rail portion 16C in the front-rear direction. Further, when the battery pack 70 is attached to the battery mounting portion 16B, the connector portion 70A is connected to the connector 25, and power is supplied from the battery pack 70 to the control unit 90 described later.
また、バッテリパック７０の上端部には、コネクタ部７０Ａの後側において、上側へ***した***部７０Ｃが形成されている。そして、バッテリパック７０のバッテリ取付部１６Ｂへの装着状態では、***部７０Ｃが、スペーサ２４の下側に隣接して配置されている（図１参照）。具体的には、スペーサ２４と***部７０Ｃとの間に略隙間のない状態で、バッテリパック７０の後端部がスペーサ２４の下側に隣接して配置されている。 Further, on the upper end portion of the battery pack 70, a raised portion 70C that is raised upward is formed on the rear side of the connector portion 70A. When the battery pack 70 is mounted on the battery mounting portion 16B, the raised portion 70C is arranged adjacent to the lower side of the spacer 24 (see FIG. 1). Specifically, the rear end portion of the battery pack 70 is arranged adjacent to the lower side of the spacer 24 in a state where there is substantially no gap between the spacer 24 and the raised portion 70C.
また、***部７０Ｃには、左右一対のロック部材７１が設けられており、ロック部材７１は、バッテリパック７０の左右の側部に配置されている。そして、バッテリパック７０のバッテリ取付部１６Ｂへの装着完了時には、ロック部材７１がハンドルハウジング１６に係合して、バッテリパック７０の装着状態が維持される構成になっている。 Further, the raised portion 70C is provided with a pair of left and right lock members 71, and the lock members 71 are arranged on the left and right side portions of the battery pack 70. When the battery pack 70 is completely mounted on the battery mounting portion 16B, the lock member 71 engages with the handle housing 16 to maintain the mounted state of the battery pack 70.
また、バッテリパック７０の前面には、左右一対の突起部７０Ｄが形成されている。突起部７０Ｄは、上側から見て、前側へ凸となる略円弧状に形成されて、バッテリパック７０の前面から僅かに突出している。 Further, a pair of left and right protrusions 70D are formed on the front surface of the battery pack 70. The protrusion 70D is formed in a substantially arc shape that is convex toward the front when viewed from above, and slightly protrudes from the front surface of the battery pack 70.
（バッテリ押え部材８０について）　図１～図３、及び図８（Ｂ）に示されるように、バッテリ押え部材８０は、ゴム等の弾性材によって構成されている。バッテリ押え部材８０は、ベース部８１を有しており、ベース部８１は、前後方向を厚み方向とし且つ左右方向を長手方向とする略矩形板状に形成されている。そして、ベース部８１が、第２本体ハウジング部１５のガイド挿通孔１５Ａの下側で且つバッテリパック７０の下部の前側において、第２本体ハウジング部１５に固定されている。具体的には、第２本体ハウジング部１５の下端部の後壁には、後側へ開放された凹状の押え収容部１５Ｅが形成されている。また、押え収容部１５Ｅの開口部には、押え収容部１５Ｅの内側へ突出した抜止部１５Ｆが形成されており、抜止部１５Ｆが押え収容部１５Ｅの開口部の周方向全周に亘って形成されている。そして、ベース部８１が、押え収容部１５Ｅ内に収容されると共に、ベース部８１の外周部が、押え収容部１５Ｅの底面と抜止部１５Ｆとによって前後方向に挟み込まれている。これにより、バッテリ押え部材８０が、バッテリパック７０の前側（ハンドルハウジング１６の押込方向側）において、第２本体ハウジング部１５に固定されている。 (About the battery pressing member 80) As shown in FIGS. 1 to 3 and 8 (B), the battery pressing member 80 is made of an elastic material such as rubber. The battery pressing member 80 has a base portion 81, and the base portion 81 is formed in a substantially rectangular plate shape having a thickness direction in the front-rear direction and a longitudinal direction in the left-right direction. Then, the base portion 81 is fixed to the second main body housing portion 15 on the lower side of the guide insertion hole 15A of the second main body housing portion 15 and on the front side of the lower portion of the battery pack 70. Specifically, a concave presser accommodating portion 15E opened to the rear side is formed on the rear wall of the lower end portion of the second main body housing portion 15. Further, the opening of the presser accommodating portion 15E is formed with a retaining portion 15F protruding inward of the presser accommodating portion 15E, and the retaining portion 15F is formed over the entire circumference of the opening of the presser accommodating portion 15E in the circumferential direction. Has been done. The base portion 81 is housed in the presser foot accommodating portion 15E, and the outer peripheral portion of the base portion 81 is sandwiched in the front-rear direction by the bottom surface of the presser foot accommodating portion 15E and the retaining portion 15F. As a result, the battery holding member 80 is fixed to the second main body housing portion 15 on the front side of the battery pack 70 (the pushing direction side of the handle housing 16).
ベース部８１の後面には、左右方向両端部において、一対の「リブ」としての押えリブ８２Ａ，８２Ｂがそれぞれ形成されている。押えリブ８２Ａ，８２Ｂは、上下方向に延在され、左右方向に並んで配置される共に、押え収容部１５Ｅの開口部から後側へ突出している。また、押えリブ８２Ａ，８２Ｂは、前後方向に弾性変形可能に構成されている。そして、バッテリ押え部材８０の最も左右方向外側に配置された押えリブ８２Ａの上端部が、バッテリパック７０の突起部７０Ｄに当接している。具体的には、前後方向における押えリブ８２Ａの後端部の位置と突起部７０Ｄの前端部の位置とが一致しており、押えリブ８２Ａが、隙間のない状態で突起部７０Ｄの前側に隣接配置されている。一方、押えリブ８２Ａに対して左右方向内側に配置された押えリブ８２Ｂは、バッテリパック７０の前側に僅かな隙間を空けて配置されている。 On the rear surface of the base portion 81, holding ribs 82A and 82B as a pair of "ribs" are formed at both ends in the left-right direction, respectively. The pressing ribs 82A and 82B extend in the vertical direction, are arranged side by side in the horizontal direction, and project rearward from the opening of the pressing housing portion 15E. Further, the pressing ribs 82A and 82B are configured to be elastically deformable in the front-rear direction. Then, the upper end portion of the pressing rib 82A arranged on the outermost side in the left-right direction of the battery pressing member 80 is in contact with the protruding portion 70D of the battery pack 70. Specifically, the position of the rear end portion of the presser rib 82A in the front-rear direction and the position of the front end portion of the protrusion 70D coincide with each other, and the presser rib 82A is adjacent to the front side of the protrusion 70D without a gap. Have been placed. On the other hand, the pressing ribs 82B arranged on the inner side in the left-right direction with respect to the pressing ribs 82A are arranged on the front side of the battery pack 70 with a slight gap.
そして、ハンドルハウジング１６が初期位置から押込位置へ移動するときには、バッテリパック７０が押えリブ８２Ａ，８２Ｂを押圧して、押えリブ８２Ａ，８２Ｂが圧縮変形する構成になっている。すなわち、バッテリ押え部材８０（押えリブ８２Ａ，８２Ｂ）は、ハンドルハウジング１６の押込状態において、バッテリパック７０を押込方向側から押える部材として構成されている。 When the handle housing 16 moves from the initial position to the pushing position, the battery pack 70 presses the pressing ribs 82A and 82B, and the pressing ribs 82A and 82B are compressed and deformed. That is, the battery pressing member 80 (pressing ribs 82A and 82B) is configured as a member that presses the battery pack 70 from the pressing direction side in the pressed state of the handle housing 16.
（制御部９０について）　制御部９０は、第２本体ハウジング部１５の下端部に設けられている。制御部９０には、前述したスイッチ機構２２のスイッチ、切替ボタン２１、変速スイッチ２３、及びバッテリパック７０が電気的に接続されている。そして、トリガ２０が引き操作されることで、制御部９０によってモータ４３が駆動して、伝達機構５０によってモータ４３の駆動力が先端工具Ｔに伝達される構成になっている。また、制御部９０によってモータ４３が駆動するときには、切替ボタン２１の切替状態に応じて、モータ４３の回転方向が設定され、変速スイッチ２３に操作位置に応じた回転速度でモータ４３が回転する構成になっている。 (Regarding the control unit 90) The control unit 90 is provided at the lower end of the second main body housing unit 15. The switch of the switch mechanism 22, the changeover button 21, the speed change switch 23, and the battery pack 70 described above are electrically connected to the control unit 90. When the trigger 20 is pulled, the motor 43 is driven by the control unit 90, and the driving force of the motor 43 is transmitted to the tip tool T by the transmission mechanism 50. Further, when the motor 43 is driven by the control unit 90, the rotation direction of the motor 43 is set according to the switching state of the changeover button 21, and the speed change switch 23 rotates at a rotation speed according to the operation position. It has become.
（作用効果）　次に、バッテリパック７０をハウジング１２に装着する手順を説明しつつ、本実施の形態の作用効果を説明する。 (Action / Effect) Next, the action / effect of the present embodiment will be described while explaining the procedure for attaching the battery pack 70 to the housing 12.
バッテリパック７０をハウジング１２に装着するときには、作業者が、一方の手でハンマドリル１０の把持部１６Ａを把持すると共に、他方の手でバッテリパック７０を把持する。また、バッテリパック７０をハンドルハウジング１６の下側で且つ後側に配置する。そして、バッテリパック７０のバッテリ側レール部７０Ｂの上下位置をハウジング１２のハウジング側レール部１６Ｃの上下位置に合わせると共に、バッテリパック７０を前側へ移動して、ハウジング側レール部１６Ｃをバッテリ側レール部７０Ｂの内部に挿入させる。これにより、バッテリパック７０がハンドルハウジング１６に前後方向にスライド可能に係合する。 When mounting the battery pack 70 on the housing 12, the operator grips the grip portion 16A of the hammer drill 10 with one hand and grips the battery pack 70 with the other hand. Further, the battery pack 70 is arranged below and behind the handle housing 16. Then, the vertical position of the battery side rail portion 70B of the battery pack 70 is aligned with the vertical position of the housing side rail portion 16C of the housing 12, the battery pack 70 is moved to the front side, and the housing side rail portion 16C is moved to the battery side rail portion. It is inserted inside the 70B. As a result, the battery pack 70 is slidably engaged with the handle housing 16 in the front-rear direction.
ハウジング側レール部１６Ｃのバッテリ側レール部７０Ｂへの挿入後、バッテリパック７０をハウジング側レール部１６Ｃに沿って前側へ移動させる。そして、バッテリパック７０が装着位置に到達すると、ロック部材７１がハンドルハウジング１６と係合してバッテリパック７０の後側への移動が規制される。また、このときには、バッテリパック７０の突起部７０Ｄがバッテリ押え部材８０の押えリブ８２Ａの後側に隣接して配置されると共に、バッテリパック７０の***部７０Ｃがスペーサ２４の下側に隣接して配置されている。これにより、バッテリパック７０の装着が完了する。 After inserting the housing-side rail portion 16C into the battery-side rail portion 70B, the battery pack 70 is moved forward along the housing-side rail portion 16C. Then, when the battery pack 70 reaches the mounting position, the lock member 71 engages with the handle housing 16 to restrict the movement of the battery pack 70 to the rear side. At this time, the protrusion 70D of the battery pack 70 is arranged adjacent to the rear side of the holding rib 82A of the battery holding member 80, and the raised portion 70C of the battery pack 70 is adjacent to the lower side of the spacer 24. Have been placed. This completes the installation of the battery pack 70.
そして、ハンマドリル１０における被加工物に対する加工時には、作業者がハンマドリル１０の把持部１６Ａを前側へ押して、先端工具Ｔを被加工物に押し付ける。これにより、ハンドルハウジング１６に前側の荷重が作用して、防振機構３０が作動する。具体的には、防振機構３０におけるダンパ部３１が圧縮変形して、ハンドルハウジング１６が、初期位置から押込位置側へ変位すると共に、本体ハウジング１３に対して前側へ相対移動する。これにより、ハンマドリル１０のモータ４３の作動時に生じる振動がダンパ部３１によって吸収されて、ハンドルハウジング１６に伝達される振動が低減される。その結果、ハンマドリル１０の作業性を向上することができる。 Then, when machining the workpiece with the hammer drill 10, the operator pushes the grip portion 16A of the hammer drill 10 forward and presses the tip tool T against the workpiece. As a result, a load on the front side acts on the handle housing 16, and the vibration isolation mechanism 30 operates. Specifically, the damper portion 31 of the anti-vibration mechanism 30 is compressed and deformed, so that the handle housing 16 is displaced from the initial position to the pushing position side and relatively moves to the front side with respect to the main body housing 13. As a result, the vibration generated when the motor 43 of the hammer drill 10 is operated is absorbed by the damper portion 31, and the vibration transmitted to the handle housing 16 is reduced. As a result, the workability of the hammer drill 10 can be improved.
また、バッテリパック７０はハンドルハウジング１６に装着されているため、ハンドルハウジング１６が初期位置から押込位置側へ移動するときには、バッテリパック７０も本体ハウジング１３に対して前側へ相対移動する。これにより、バッテリパック７０がバッテリ押え部材８０の押えリブ８２Ａ，８２Ｂを押圧して、押えリブ８２Ａ，８２Ｂが圧縮変形する。したがって、ハンマドリル１０の作動時におけるバッテリパック７０の振動をバッテリ押え部材８０（押えリブ８２Ａ，８２Ｂ）によって吸収することができる。その結果、バッテリパック７０の装着状態を良好に維持することができる。 Further, since the battery pack 70 is mounted on the handle housing 16, when the handle housing 16 moves from the initial position to the pushing position side, the battery pack 70 also moves relative to the front side with respect to the main body housing 13. As a result, the battery pack 70 presses the pressing ribs 82A and 82B of the battery pressing member 80, and the pressing ribs 82A and 82B are compressed and deformed. Therefore, the vibration of the battery pack 70 when the hammer drill 10 is operated can be absorbed by the battery pressing members 80 (pressing ribs 82A and 82B). As a result, the mounted state of the battery pack 70 can be maintained satisfactorily.
ここで、ハンマドリル１０では、ハウジング１２が本体ハウジング１３とハンドルハウジング１６とを含んで構成されており、ハンドルハウジング１６が、防振機構３０によって本体ハウジング１３に対して前後方向に相対移動可能に連結されている。そして、上述のように、バッテリパック７０が、ハンドルハウジング１６のバッテリ取付部１６Ｂに着脱自在に装着され、バッテリ押え部材８０が、本体ハウジング１３に設けられている。すなわち、ハウジング１２において、バッテリパック７０が装着されるハウジング部と、バッテリ押え部材８０が設けられているハウジング部と、が別々のハウジング部として構成され、両ハウジング部が相対移動可能に構成されている。そして、バッテリ押え部材８０が、バッテリパック７０と本体ハウジング１３（第２本体ハウジング部１５）との間に配置されている。具体的には、バッテリ押え部材８０がバッテリパック７０に対して前側（押込方向側）に配置されている。 Here, in the hammer drill 10, the housing 12 includes the main body housing 13 and the handle housing 16, and the handle housing 16 is connected by the vibration isolation mechanism 30 so as to be relatively movable in the front-rear direction with respect to the main body housing 13. Has been done. Then, as described above, the battery pack 70 is detachably attached to the battery mounting portion 16B of the handle housing 16, and the battery holding member 80 is provided in the main body housing 13. That is, in the housing 12, the housing portion on which the battery pack 70 is mounted and the housing portion provided with the battery holding member 80 are configured as separate housing portions, and both housing portions are configured to be relatively movable. There is. Then, the battery holding member 80 is arranged between the battery pack 70 and the main body housing 13 (second main body housing portion 15). Specifically, the battery pressing member 80 is arranged on the front side (pushing direction side) with respect to the battery pack 70.
このため、ハンマドリル１０の非作業時（ハンドルハウジング１６の初期位置）においてバッテリ押え部材８０によってバッテリパック７０を押えない設定にしても、ハンマドリル１０の作業時（ハンドルハウジング１６の押込状態）には、バッテリパック７０がバッテリ押え部材８０を押圧するため、バッテリ押え部材８０によってバッテリパック７０を押えることができる。これにより、バッテリパック７０の装着時においてバッテリ押え部材８０が圧縮変形することを抑制できる。したがって、バッテリパック７０の装着荷重を低減することができる。また、ハンマドリル１０の作業時にはバッテリ押え部材８０によってバッテリパック７０が押えられるため、バッテリパック７０の振動を抑制することができる。以上により、バッテリパック７０の振動を抑制しつつ、バッテリパック７０の装着性を向上することができる。 Therefore, even if the battery pack 70 is not pressed by the battery pressing member 80 when the hammer drill 10 is not working (initial position of the handle housing 16), when the hammer drill 10 is working (the handle housing 16 is pushed in), the battery pack 70 is not pressed. Since the battery pack 70 presses the battery pressing member 80, the battery packing 70 can be pressed by the battery pressing member 80. As a result, it is possible to prevent the battery holding member 80 from being compressed and deformed when the battery pack 70 is attached. Therefore, the mounting load of the battery pack 70 can be reduced. Further, since the battery pack 70 is pressed by the battery pressing member 80 during the work of the hammer drill 10, the vibration of the battery pack 70 can be suppressed. As described above, the wearability of the battery pack 70 can be improved while suppressing the vibration of the battery pack 70.
また、ハンドルハウジング１６が初期位置から押込位置側へ向かうに従い、バッテリ押え部材８０（押えリブ８２Ａ，８２Ｂ）の圧縮変形量が大きくなる。このため、作業者のハンドルハウジング１６への押込力が増加するに従い、バッテリ押え部材８０（押えリブ８２Ａ，８２Ｂ）からバッテリパック７０に作用する反力が高くなる。これにより、ハンマドリル１０の作業時におけるバッテリパック７０の振動を効果的に抑制することができる。 Further, as the handle housing 16 moves from the initial position toward the pushing position side, the amount of compression deformation of the battery holding member 80 (holding ribs 82A and 82B) increases. Therefore, as the pushing force of the operator into the handle housing 16 increases, the reaction force acting on the battery pack 70 from the battery pressing members 80 (pressing ribs 82A and 82B) increases. As a result, the vibration of the battery pack 70 during the work of the hammer drill 10 can be effectively suppressed.
また、バッテリパック７０の装着時には、バッテリパック７０の突起部７０Ｄが、バッテリ押え部材８０の押えリブ８２Ａに当接している。具体的には、押えリブ８２Ａが、略圧縮変形しない状態で、突起部７０Ｄの前側に隣接して配置されている。これにより、バッテリパック７０の装着荷重が高くなることを抑制しつつ、ハンドルハウジング１６の初期位置におけるバッテリパック７０の前後方向のがたつきを押えリブ８２Ａによって抑制することができる。すなわち、作業者によってハンドルハウジング１６が前側へ押込まれたときに、押えリブ８２Ａを直ちに圧縮変形させて、バッテリパック７０を押えることができる。 Further, when the battery pack 70 is attached, the protrusion 70D of the battery pack 70 is in contact with the holding rib 82A of the battery holding member 80. Specifically, the pressing rib 82A is arranged adjacent to the front side of the protrusion 70D in a state where the pressing rib 82A is not substantially compressed and deformed. As a result, the rattling of the battery pack 70 in the front-rear direction at the initial position of the handle housing 16 can be suppressed by the holding rib 82A while suppressing the increase in the mounting load of the battery pack 70. That is, when the handle housing 16 is pushed forward by the operator, the holding rib 82A can be immediately compressed and deformed to hold the battery pack 70.
また、バッテリ押え部材８０は、バッテリパック７０側へ突出した複数の押えリブ８２Ａ，８２Ｂを有している。このため、ハンマドリル１０の作動時においてバッテリパック７０に伝達される振動をバッテリ押え部材８０（押えリブ８２Ａ，８２Ｂ）によって効果的に吸収することができる。すなわち、例えば、仮にバッテリ押え部材８０において押えリブ８２Ａ，８２Ｂを省略して、ベース部８１の厚みを厚くしてベース部８１によってバッテリパック７０を押える構成にした場合（以下、このバッテリ押え部材８０を比較例のバッテリ押え部材８０という）には、バッテリ押え部材８０のばね性（ばね定数）が高くなる。このため、ハンマドリル１０の作動時には、比較的高いばね性を有するバッテリ押え部材８０の後面が、バッテリパック７０を受けるため、モータ４３などの振動が直接的にバッテリパック７０に伝達される。これにより、バッテリパック７０に伝達される振動に対するバッテリ押え部材８０の吸収効果が低減する可能性がある。 Further, the battery pressing member 80 has a plurality of pressing ribs 82A and 82B protruding toward the battery pack 70 side. Therefore, the vibration transmitted to the battery pack 70 when the hammer drill 10 is operated can be effectively absorbed by the battery pressing members 80 (pressing ribs 82A and 82B). That is, for example, in the case where the pressing ribs 82A and 82B are omitted in the battery pressing member 80, the thickness of the base portion 81 is increased so that the battery pack 70 is pressed by the base portion 81 (hereinafter, the battery pressing member 80). The battery presser member 80 of the comparative example) has a higher spring property (spring constant) of the battery presser member 80. Therefore, when the hammer drill 10 is operated, the rear surface of the battery holding member 80 having a relatively high spring property receives the battery pack 70, so that the vibration of the motor 43 or the like is directly transmitted to the battery pack 70. As a result, the absorption effect of the battery pressing member 80 on the vibration transmitted to the battery pack 70 may be reduced.
これに対して、本実施の形態では、バッテリ押え部材８０が、バッテリパック７０側へ突出した複数の押えリブ８２Ａ，８２Ｂを有している。これにより、バッテリ押え部材８０（押えリブ８２Ａ，８２Ｂ）のばね性を上記比較例のバッテリ押え部材８０よりも低くすることができる。このため、ハンドルハウジング１６の本体ハウジング１３に対する前側への相対移動時に、押えリブ８２Ａ，８２Ｂを良好に圧縮変形させてバッテリパック７０に押えることができる。これにより、モータ４３などの振動を押えリブ８２Ａ，８２Ｂによって良好に吸収することができる。したがって、バッテリ押え部材８０における振動吸収効果を高くすることができる。 On the other hand, in the present embodiment, the battery pressing member 80 has a plurality of pressing ribs 82A and 82B protruding toward the battery pack 70 side. As a result, the springiness of the battery pressing member 80 (pressing ribs 82A, 82B) can be made lower than that of the battery pressing member 80 of the above comparative example. Therefore, when the handle housing 16 is relatively moved to the front side with respect to the main body housing 13, the pressing ribs 82A and 82B can be satisfactorily compressed and deformed and pressed against the battery pack 70. As a result, the vibrations of the motor 43 and the like can be satisfactorily absorbed by the holding ribs 82A and 82B. Therefore, the vibration absorbing effect of the battery holding member 80 can be enhanced.
しかも、一対の押えリブ８２Ａ，８２Ｂが、バッテリ押え部材８０の左右方向両端部に設けられている。これにより、ハンマドリル１０の作業時にハンドルハウジング１６が前側へ押込まれたときには、押えリブ８２Ａ，８２Ｂによってバッテリパック７０の左右方向両端側部分を支持することができる。これにより、バッテリパック７０の左右方向の振れを抑制することができる。したがって、バッテリパック７０の装着状態を良好に維持することができる。 Moreover, a pair of pressing ribs 82A and 82B are provided at both ends of the battery pressing member 80 in the left-right direction. As a result, when the handle housing 16 is pushed forward during the work of the hammer drill 10, the holding ribs 82A and 82B can support both ends of the battery pack 70 in the left-right direction. As a result, it is possible to suppress the runout of the battery pack 70 in the left-right direction. Therefore, the mounted state of the battery pack 70 can be maintained satisfactorily.
また、ハンドルハウジング１６の初期位置では、一方の押えリブ８２Ａがバッテリパック７０の突起部７０Ｄに当接しており、他方の押えリブ８２Ｂが、バッテリパック７０の前側へ僅かな隙間を空けて離間して配置されている。このため、バッテリパック７０の装着時にハンドルハウジング１６が本体ハウジング１３に対して前側へ仮に相対移動して、バッテリパック７０が押えリブ８２Ａ，８２Ｂに当接しても、押えリブ８２Ａ，８２Ｂの圧縮変形量を極力少なくすることができる。 Further, at the initial position of the handle housing 16, one pressing rib 82A is in contact with the protrusion 70D of the battery pack 70, and the other pressing rib 82B is separated from the front side of the battery pack 70 with a slight gap. Is arranged. Therefore, even if the handle housing 16 temporarily moves to the front side with respect to the main body housing 13 when the battery pack 70 is attached and the battery pack 70 comes into contact with the pressing ribs 82A and 82B, the pressing ribs 82A and 82B are compressed and deformed. The amount can be reduced as much as possible.
また、ハウジング１２では、防振機構３０によってハンドルハウジング１６が本体ハウジング１３に対して相対移動可能に構成されている。そして、防振機構３０は、ハンドルハウジング１６と本体ハウジング１３の連結部１３Ａとを連結するダンパ部３１を有しており、ダンパ部３１が、ハンドルハウジング１６のエラストマにより構成された層の一部を構成している。これにより、ハンドルハウジング１６の表面をカバーするエラストマの層を活用して、ハンドルハウジング１６を本体ハウジング１３に対して相対移動可能に連結することができる。 Further, in the housing 12, the handle housing 16 is configured to be movable relative to the main body housing 13 by the vibration isolation mechanism 30. The anti-vibration mechanism 30 has a damper portion 31 that connects the handle housing 16 and the connecting portion 13A of the main body housing 13, and the damper portion 31 is a part of the layer formed by the elastomer of the handle housing 16. Consists of. Thereby, the handle housing 16 can be connected to the main body housing 13 so as to be relatively movable by utilizing the layer of the elastomer covering the surface of the handle housing 16.
また、バッテリパック７０はバッテリ側レール部７０Ｂを有しており、バッテリ側レール部７０Ｂがハウジング１２のハウジング側レール部１６Ｃに前後方向にスライド可能に係合している。そして、バッテリ押え部材８０が、前後方向においてバッテリパック７０とハウジング１２の第２本体ハウジング部１５との間に配置されている。具体的には、バッテリ押え部材８０が、バッテリパック７０の前側（装着方向側）に配置されている。このため、バッテリパック７０のハウジング１２への装着途中にバッテリ押え部材８０の押えリブ８２Ａをバッテリパック７０に当接することを抑制できる。すなわち、バッテリパック７０の装着完了時に押えリブ８２Ａをバッテリパック７０に当接させることができる。これにより、バッテリパック７０の装着荷重を一層低減することができる。 Further, the battery pack 70 has a battery-side rail portion 70B, and the battery-side rail portion 70B is slidably engaged with the housing-side rail portion 16C of the housing 12 in the front-rear direction. Then, the battery holding member 80 is arranged between the battery pack 70 and the second main body housing portion 15 of the housing 12 in the front-rear direction. Specifically, the battery holding member 80 is arranged on the front side (mounting direction side) of the battery pack 70. Therefore, it is possible to prevent the presser rib 82A of the battery presser member 80 from coming into contact with the battery pack 70 during the mounting of the battery pack 70 on the housing 12. That is, the holding rib 82A can be brought into contact with the battery pack 70 when the mounting of the battery pack 70 is completed. As a result, the mounting load of the battery pack 70 can be further reduced.
また、防振機構３０は、ガイド機構３２を有しており、ハンドルハウジング１６の本体ハウジング１３に対する前後方向の相対移動がガイド機構３２によってガイドされている。これにより、ハンマドリル１０の作動時におけるハンドルハウジング１６の左右方向の振れを抑制してハンドルハウジング１６を本体ハウジング１３に対して前後方向に相対移動させることができる。 Further, the anti-vibration mechanism 30 has a guide mechanism 32, and the relative movement of the handle housing 16 with respect to the main body housing 13 in the front-rear direction is guided by the guide mechanism 32. As a result, the handle housing 16 can be moved relative to the main body housing 13 in the front-rear direction by suppressing the left-right runout of the handle housing 16 when the hammer drill 10 is operated.
また、防振機構３０は、ハンドルハウジング１６の上端部及び下端部の２箇所に設けられている。これにより、ハンマドリル１０の作動時に、ハンドルハウジング１６の下端部を前側へ良好に移動させて、バッテリパック７０によって押えリブ８２Ａ，８２Ｂを圧縮変形させることができる。したがって、ハンマドリル１０の作動時におけるバッテリパック７０の振動を良好に抑制することができる。 Further, the anti-vibration mechanism 30 is provided at two locations, an upper end portion and a lower end portion of the handle housing 16. Thereby, when the hammer drill 10 is operated, the lower end portion of the handle housing 16 can be satisfactorily moved to the front side, and the pressing ribs 82A and 82B can be compressed and deformed by the battery pack 70. Therefore, the vibration of the battery pack 70 during the operation of the hammer drill 10 can be satisfactorily suppressed.
また、ハンドルハウジング１６の抉り部１６Ｄには、スペーサ２４が設けられており、スペーサ２４がバッテリパック７０の***部７０Ｃに当接している。つまり、スペーサ２４がバッテリパック７０の後側の上端部に当接している。これにより、ハンマドリル１０の作動時におけるバッテリパック７０の振動を効果的に抑制することができる。すなわち、ハンドルハウジング１６が前側へ移動してバッテリパック７０がバッテリ押え部材８０を押圧するときには、バッテリパック７０の前側下部に後側への反力が作用する。このため、バッテリパック７０には、左側から見て反時計回りの回転モーメントが作用する。これにより、バッテリパック７０の***部７０Ｃが上側へ変位するように回転しようする。ここで、***部７０Ｃの上側には、スペーサ２４が設けられており、スペーサ２４が***部７０Ｃに当接している。これにより、***部７０Ｃがスペーサ２４を上側へ押し付けて、スペーサ２４が圧縮変形する。すなわち、バッテリパック７０が、バッテリ押え部材８０とスペーサ２４とによって挟まれるようになる。したがって、ハンマドリル１０の作動時におけるバッテリパック７０の振動を効果的に抑制することができる。 Further, a spacer 24 is provided in the hollowed portion 16D of the handle housing 16, and the spacer 24 is in contact with the raised portion 70C of the battery pack 70. That is, the spacer 24 is in contact with the upper end of the rear side of the battery pack 70. As a result, the vibration of the battery pack 70 when the hammer drill 10 is operated can be effectively suppressed. That is, when the handle housing 16 moves to the front side and the battery pack 70 presses the battery holding member 80, a reaction force to the rear side acts on the lower front side of the battery pack 70. Therefore, a counterclockwise rotational moment acts on the battery pack 70 when viewed from the left side. As a result, the raised portion 70C of the battery pack 70 tries to rotate so as to be displaced upward. Here, a spacer 24 is provided on the upper side of the raised portion 70C, and the spacer 24 is in contact with the raised portion 70C. As a result, the raised portion 70C presses the spacer 24 upward, and the spacer 24 is compressed and deformed. That is, the battery pack 70 is sandwiched between the battery holding member 80 and the spacer 24. Therefore, the vibration of the battery pack 70 during the operation of the hammer drill 10 can be effectively suppressed.
なお、本実施の形態では、押えリブ８２Ａが、バッテリパック７０の突起部７０Ｄに当接する構成になっているが、図９に示されるように、初期位置において押えリブ８２Ａ，８２Ｂをバッテリパック７０に対して前側へ離間させる構成にしてもよい。例えば、押えリブ８２Ａのベース部８１からの突出高さを本実施の形態よりも低くして、前後方向において、押えリブ８２Ａ、８２Ｂとバッテリパック７０との間に僅かな隙間を空けてもよい。また、図９に示される変形例においても、押込位置においては押えリブ８２Ａ、８２Ｂがバッテリパック７０に当接し、圧縮変形する。この場合においても、バッテリパック７０の装着荷重を低減することができると共に、ハンマドリル１０の作動時におけるバッテリパック７０の振動を抑制することができる。 In the present embodiment, the pressing ribs 82A are configured to come into contact with the protrusions 70D of the battery pack 70. However, as shown in FIG. 9, the pressing ribs 82A and 82B are attached to the battery pack 70 at the initial position. It may be configured to be separated from the front side. For example, the height of protrusion of the presser rib 82A from the base portion 81 may be lower than that of the present embodiment to leave a slight gap between the presser ribs 82A and 82B and the battery pack 70 in the front-rear direction. .. Further, also in the modified example shown in FIG. 9, the pressing ribs 82A and 82B abut on the battery pack 70 at the pushing position and are compressed and deformed. Also in this case, the mounting load of the battery pack 70 can be reduced, and the vibration of the battery pack 70 when the hammer drill 10 is operated can be suppressed.
また、本実施の形態では、バッテリ押え部材８０の左右方向両端部に、一対の押えリブ８２Ａ，８２Ｂが形成されている。すなわち、バッテリ押え部材８０に、４本の押えリブが形成されているが、バッテリ押え部材８０における押えリブの本数は任意に設定することができる。例えば、バッテリ押え部材８０において、押えリブを５本以上形成してもよい。この場合には、押えリブをバッテリ押え部材の左右方向中間部に形成してもよい。また、例えば、バッテリ押え部材８０において押えリブ８２Ａ，８２Ｂを省略して、バッテリ押え部材８０の後面をバッテリパック７０に当接するように、バッテリ押え部材８０の厚みを設定してもよい。 Further, in the present embodiment, a pair of pressing ribs 82A and 82B are formed at both ends of the battery pressing member 80 in the left-right direction. That is, although four pressing ribs are formed on the battery pressing member 80, the number of pressing ribs on the battery pressing member 80 can be arbitrarily set. For example, in the battery pressing member 80, five or more pressing ribs may be formed. In this case, the holding rib may be formed in the middle portion in the left-right direction of the battery holding member. Further, for example, in the battery pressing member 80, the pressing ribs 82A and 82B may be omitted, and the thickness of the battery pressing member 80 may be set so that the rear surface of the battery pressing member 80 comes into contact with the battery pack 70.
１０…ハンマドリル（作業機）、１２…ハウジング、１３…本体ハウジング（本体部）、１６…ハンドルハウジング（ハンドル部）、３０…防振機構、３１…ダンパ部、３２…ガイド機構、４３…モータ、７０…バッテリパック、８０…バッテリ押え部材（弾性体）、８２Ａ…押えリブ（リブ）、８２Ｂ…押えリブ（リブ） 10 ... Hammer drill (working machine), 12 ... Housing, 13 ... Main body housing (main body), 16 ... Handle housing (handle part), 30 ... Anti-vibration mechanism, 31 ... Damper part, 32 ... Guide mechanism, 43 ... Motor, 70 ... Battery pack, 80 ... Battery presser member (elastic body), 82A ... Presser rib (rib), 82B ... Presser rib (rib)

Claims (10)

  1. モータと、
    前記モータを収容する本体部と、防振機構によって前記本体部に相対移動可能に連結されたハンドル部と、を含んで構成されたハウジングと、
    前記ハンドル部に着脱自在に装着され、前記モータに電力を供給するバッテリパックと、
    前記本体部に設けられ、前記バッテリパックと前記本体部との間に配置されると共に、前記ハンドル部が前記本体部に対して相対移動することで前記バッテリパックと当接して圧縮変形する弾性体と、
    を備えた作業機。     With the motor
    A housing including a main body for accommodating the motor and a handle portion movably connected to the main body by an anti-vibration mechanism.
    A battery pack that is detachably attached to the handle and supplies electric power to the motor.
    An elastic body provided on the main body, arranged between the battery pack and the main body, and the handle portion moves relative to the main body to come into contact with the battery pack and compress and deform. When,
    Working machine equipped with.
  2. 前記ハンドル部は、第１位置と、前記第１位置から前記ハウジングに接近する第２位置と、の間で相対移動可能であり、
    前記ハンドル部が前記第１位置から前記第２位置へ移動することで、前記本体部及び前記バッテリパックによって圧縮される前記弾性体の圧縮量が増大する請求項１に記載の作業機。     The handle portion is relatively movable between the first position and the second position approaching the housing from the first position.
    The working machine according to claim 1, wherein when the handle portion moves from the first position to the second position, the amount of compression of the elastic body compressed by the main body portion and the battery pack increases.
  3. 前記第１位置において、前記弾性体が前記バッテリパックに当接している請求項２に記載の作業機。 The working machine according to claim 2, wherein the elastic body is in contact with the battery pack at the first position.
  4. 前記第１位置において、前記弾性体が前記バッテリパックから離間している請求項２に記載の作業機。 The working machine according to claim 2, wherein the elastic body is separated from the battery pack at the first position.
  5. 前記ハンドル部は、樹脂材により構成された層と、エラストマにより構成された層と、を有する２層構造を成しており、
    前記防振機構は、前記本体部と前記ハンドル部とを連結するダンパ部を有しており、
    前記ダンパ部が、前記エラストマにより構成された層の一部を構成している請求項１～請求項４の何れか１項に記載の作業機。     The handle portion has a two-layer structure having a layer made of a resin material and a layer made of an elastomer.
    The anti-vibration mechanism has a damper portion that connects the main body portion and the handle portion.
    The working machine according to any one of claims 1 to 4, wherein the damper portion constitutes a part of a layer formed of the elastomer.
  6. 前記ハンドル部は、前記本体部に対して第１方向に相対移動可能に構成されると共に、前記バッテリパックを前記第１方向にガイドするハウジング側レール部を有しており、
    前記バッテリパックは、第１方向一方側へ移動することで前記ハンドル部に装着され、前記弾性体が前記バッテリパックの第１方向一方側に隣接して配置されている請求項１～請求項５の何れか１項に記載の作業機。     The handle portion is configured to be movable relative to the main body portion in the first direction, and has a housing-side rail portion that guides the battery pack in the first direction.
    Claims 1 to 5 wherein the battery pack is attached to the handle portion by moving to one side in the first direction, and the elastic body is arranged adjacent to one side in the first direction of the battery pack. The working machine according to any one of the above.
  7. 前記防振機構は、前記ハンドル部の前記第１方向への移動をガイドするガイド機構を有している請求項６に記載の作業機。 The working machine according to claim 6, wherein the anti-vibration mechanism has a guide mechanism for guiding the movement of the handle portion in the first direction.
  8. 前記防振機構は、２箇所設けられており、２箇所の前記防振機構が、前記第１方向と交差する第２方向に離間して配置されている請求項７に記載の作業機。 The working machine according to claim 7, wherein the anti-vibration mechanism is provided at two places, and the two anti-vibration mechanisms are arranged apart from each other in a second direction intersecting the first direction.
  9. 前記弾性体は、前記バッテリパック側へ突出した複数のリブを有しており、
    前記リブが、前記第１方向及び前記第２方向に交差する第３方向に並んで配置されると共に、前記弾性体の前記第３方向の両端部に形成されている請求項８に記載の作業機。     The elastic body has a plurality of ribs protruding toward the battery pack side.
    The work according to claim 8, wherein the ribs are arranged side by side in a third direction intersecting the first direction and the second direction, and are formed at both ends of the elastic body in the third direction. Machine.
  10. 前記弾性体の前記第３方向の両端部には、それぞれ一対の前記リブが形成されており、
    一対の前記リブの一方が、前記バッテリパックに当接し、一対の前記リブの他方が、前記バッテリパックから離間している請求項９に記載の作業機。      A pair of the ribs are formed at both ends of the elastic body in the third direction.
    The working machine according to claim 9, wherein one of the pair of ribs is in contact with the battery pack, and the other of the pair of ribs is separated from the battery pack.
PCT/JP2021/007391 2020-03-31 2021-02-26 Work machine WO2021199816A1 (en)

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