JP2020040161A - Work tool - Google Patents

Abstract

To provide a technology which can suppress vibration transmission to a gripping part of a work tool which linearly reciprocates a tip tool.SOLUTION: A hammer drill 1 includes a motor 2, a drive mechanism 3, a main body housing 10, and a handle 15. The drive mechanism 3 linearly reciprocates a tip tool along a drive shaft A1. The main body housing 10 houses the motor 2, and the drive mechanism 3. The handle 15 has a gripping part 16 which extends approximately in a vertical direction, and a battery mounting part 171 which is arranged at a lower side of the gripping part 16, and mounts and dismounts the battery 93. An upper end part of the handle 15 is connected to a rear end part of the main body housing 10 so as to relatively move through an elastic member 191. A lower end part of the handle 15 is connected to the rear end part of the main body housing 10 so as to rotate around a rotation axis A2 extending in a longitudinal direction. The rotation axis A2 is positioned below the battery mounting part 171.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power tool configured to reciprocate a tip tool linearly.

  2. Description of the Related Art A hand-held power tool (so-called reciprocating tool) that performs a working operation on a workpiece by reciprocating a tip tool linearly along a predetermined drive shaft by the power of a motor is known. In a reciprocating tool, vibrations mainly in the direction of the drive axis are generated in the tool body accommodating the drive mechanism in association with the machining operation. Therefore, for example, Patent Document 1 discloses a reciprocating tool (hammer drill) including a tool body and a handle having an upper end connected to the tool body via a vibration damping mechanism.

U.S. Patent Application Publication No. 2017/0368673

  In a reciprocating power tool having a configuration as in Patent Document 1, further improvement is desired with respect to suppression of transmission of vibration to a grip portion.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a power tool that reciprocates a tip tool in a straight line, and a technique that contributes to suppression of vibration transmission to a gripping portion.

  According to one aspect of the present invention, there is provided a power tool configured to perform a machining operation by driving a tip tool. The power tool includes a motor, a drive mechanism, a main body housing, and a handle.

  The drive mechanism is configured to perform an operation of linearly reciprocating the tip tool along the drive shaft by the power of a motor. The drive shaft extends in the front-rear direction of the power tool. The main body housing houses the motor and the drive mechanism. The handle includes a grip part and a battery mounting part. The grip portion extends substantially vertically in a direction crossing the drive shaft. The battery mounting portion is provided below the grip portion, and is configured so that the battery can be attached and detached. Further, the upper end of the handle is connected to the rear end of the main body housing via an elastic member so as to be relatively movable. A lower end of the handle is connected to the rear end of the main body housing so as to be relatively rotatable around a rotation axis extending in the left-right direction. The rotation axis of the handle is located below the battery mounting portion.

  In the power tool of this aspect, the upper end of the handle is connected to the main body housing via the elastic member, and the lower end of the handle is connected to the main body housing so as to be rotatable around a rotation axis extending in the left-right direction. I have. Therefore, while the handle rotates about the rotation axis with respect to the main body housing, it responds to the front-rear vibration and the vertical vibration generated in the main housing, and particularly, the front-rear direction generated by the reciprocating drive of the tool bit. Can be absorbed by the elastic member. Further, by disposing the rotation shaft below the battery mounting portion, the separation distance between the elastic member and the rotation shaft can be made as large as possible. Accordingly, the elastic member can efficiently absorb the vibration at a position where the amplitude with respect to the main body housing is large, so that the transmission of the vibration to the grip portion can be effectively suppressed.

  The power tool in this aspect generally indicates a power tool configured to reciprocate the tip tool linearly by the power of a motor. Examples of such work tools include hammer drills, electric hammers, and reciprocating saws.

  The battery mounting portion in this aspect refers to a physical configuration that receives the mass of the battery in the vertical direction. Typically, a guide rail on which the battery slides and engages can be employed as the battery mounting portion.

  The type of the elastic member in this aspect is not particularly limited as long as it can elastically connect the upper end portion of the handle and the main body housing. For example, a spring, rubber, or synthetic resin may be used as the elastic member.

  In one embodiment of the present invention, the rotation shaft may be arranged on the front side of the battery when the battery is mounted on the battery mounting portion. According to this aspect, a rational arrangement of the rotating shaft can be realized.

  In one embodiment of the present invention, the motor may include a motor body and a motor shaft. The motor body includes a stator and a rotor. The motor shaft extends from the rotor and rotates integrally with the rotor. And a motor may be arrange | positioned so that the rotating shaft of a motor shaft may cross a drive shaft. Further, the rotation shaft of the handle may be arranged below the motor body. When such a motor arrangement is adopted, an empty area is likely to be formed below the motor body. Therefore, it is possible to arrange a connection structure that enables the lower end portion of the handle and the main body housing to be rotatable around the rotation axis by using the empty space. The lower end of the handle and the main body housing can be connected to each other via, for example, a shaft extending along the rotation axis or an uneven engagement centered on the rotation axis.

  In one embodiment of the present invention, the power tool may further include a speed setting unit that receives a setting of a rotation speed of the motor in accordance with an external operation by a user. And a speed setting part may be provided in the steering wheel. Such a speed setting unit generally has an electronic component. Therefore, by disposing the speed setting portion on the handlebar whose vibration is reduced as compared with the main body housing, the speed setting portion can be protected from vibration.

  In one embodiment of the present invention, the power tool may further include a wireless unit capable of wireless communication with an external device. The wireless unit may be provided on the handle. The wireless unit has electronic components. Therefore, by arranging the wireless unit on the handlebar whose vibration is reduced as compared with the main body housing, the wireless unit can be protected from vibration.

  In one aspect of the invention, the handle may be located partially within the body housing. The wireless unit is detachable from a housing formed in a portion of the handle disposed in the main body housing, and the main body housing is provided to face the housing and allows the wireless unit to pass therethrough. It may have an opening. According to this aspect, the user can easily attach / detach the wireless unit that can be shared with another electric tool or the like through the opening formed in the main body housing as needed.

  In one aspect of the present invention, the power tool may further include a first detection unit capable of detecting a relative position of the handle with respect to the main body housing. And the 1st detection part may be provided in the steering wheel. The first detection unit has an electronic component. Therefore, by disposing the first detection unit on the handlebar whose vibration is reduced as compared with the main body housing, the first detection unit can be protected from vibration. In addition, since the change of the relative position of the handle accompanying the pushing of the tip tool with respect to the main body housing can be detected from the detection result of the first detecting section, the first detecting section is typically used to detect the pushing of the tip tool. Can be.

  In one embodiment of the present invention, the drive mechanism may be further configured to be capable of performing an operation of rotating the tip tool around the drive axis by the power of the motor. In this case, the power tool may further include a second detection unit capable of detecting a motion state of the main body housing around the drive shaft. And the 2nd detection part may be provided in the steering wheel. The second detection unit has an electronic component. Therefore, by arranging the second detection unit on the handle whose vibration is reduced as compared with the main body housing, the second detection unit can be protected from vibration. Note that excessive rotation of the main body housing around the drive shaft can be detected from the detection result of the second detection unit. Excessive rotation of the main body housing typically corresponds to a state in which the tool bit is locked to the workpiece during rotation driving and the main body housing is swung, so the second detection unit detects a so-called swung state. Can be used as a sensor.

  In one aspect of the present invention, the power tool may further include a battery mounted on the battery mounting unit.

  According to one aspect of the present invention, there is provided a power tool configured to perform a machining operation by driving a tip tool. The power tool includes a motor, a drive mechanism, a main body housing, a handle, and a battery.

  The drive mechanism is configured to perform an operation of linearly reciprocating the tip tool along the drive shaft by the power of a motor. The drive shaft extends in the front-rear direction of the power tool. The main body housing houses the motor and the drive mechanism. The handle includes a grip part and a battery mounting part. The grip portion extends substantially vertically in a direction crossing the drive shaft. The battery mounting part is provided below the grip part. The battery is removably mounted on the battery mounting portion. Further, the upper end of the handle is connected to the rear end of the main body housing via an elastic member so as to be relatively movable. The lower end of the handle is connected to the rear end of the main body housing so as to be relatively rotatable around a rotation axis extending in the left-right direction. The pivot axis of the handle is located below the center of gravity of the handle with the battery mounted.

  In the power tool of this aspect, the upper end of the handle is connected to the main body housing via the elastic member, and the lower end of the handle is connected to the main body housing so as to be rotatable around a rotation axis extending in the left-right direction. I have. In the handle having such a configuration, by disposing the rotation shaft below the center of gravity of the handle with the battery mounted, as in this embodiment, compared to the case where the pivot is disposed above the center of gravity, The handle can easily rotate around the rotation axis with respect to the main body housing. As a result, the effect of suppressing the vibration applied to the grip portion can be enhanced.

It is a right view of a hammer drill. It is sectional drawing of a hammer drill. FIG. 4 is a right side view of the handle with a battery mounted. FIG. 4 is a cross-sectional view of the handle with a battery mounted. FIG. 5 is a sectional view taken along line VV in FIG. 4. FIG. 6 is a sectional view taken along line VI-VI in FIG. 2. FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 6, showing the hammer drill when the handle is at a rearmost position. It is sectional drawing corresponding to FIG. 7, and shows a hammer drill at the time of a handle | steering-wheel being in a foremost position. It is sectional drawing in the IX-IX line | wire of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiment, the hammer drill 1 is illustrated as an example of a working tool configured to perform a machining operation by driving the tip tool 91. The hammer drill 1 performs an operation of reciprocating the tip tool 91 mounted on the tool holder 39 linearly along a predetermined drive axis A1 (hereinafter, referred to as a hammer operation), and rotationally drives the tip tool 91 around the drive axis A1. (Hereinafter, referred to as a drill operation).

  First, a schematic configuration of the hammer drill 1 will be described. As shown in FIGS. 1 and 2, an outer shell of the hammer drill 1 is mainly formed by a main body housing 10 and a handle 15.

  The main body housing 10 mainly includes two parts, a drive mechanism housing part 11 that houses the drive mechanism 3 and a motor housing part 12 that houses the motor 2, and is generally formed in a substantially L-shape in side view. I have.

  The drive mechanism housing part 11 is formed as a long box-like body, and extends along the drive shaft A1. A tool holder 39 to which the tip tool 91 can be attached and detached is arranged in one end of the drive mechanism housing 11 in the direction of the drive axis A1. The tool holder 39 is supported by the drive mechanism housing 11 so as to be rotatable around the drive shaft A1. Further, the tool holder 39 is configured to hold the tip tool 91 so as not to rotate and to be movable linearly in the direction of the drive shaft A1. Note that one end of the drive mechanism housing portion 11 in which the tool holder 39 is housed is formed in a substantially cylindrical shape. An auxiliary handle 95 can be attached to and detached from the outer periphery of the cylindrical portion.

  The motor accommodating portion 12 is connected and fixed to the drive mechanism accommodating portion 11 at the other end thereof in the direction of the drive shaft A1 so as to be relatively immovable with respect to the drive mechanism accommodating portion 11, and intersects the drive shaft A1 so that It protrudes in the direction away from A1. The motor 2 is arranged in the motor housing 12 such that the rotation axis of the motor shaft 25 extends in a direction intersecting the drive axis A1 (specifically, a direction oblique to the drive axis A1).

  In the following description, for the sake of convenience, the extending direction of the drive shaft A1 is defined as the front-back direction of the hammer drill 1, and one end provided with the tool holder 39 is located on the front side (also referred to as the tip region side) of the hammer drill 1. The opposite side is defined as the back side. The direction orthogonal to the drive shaft A1 and corresponding to the direction in which the rotation axis of the motor shaft 25 extends is defined as the vertical direction of the hammer drill 1, and the motor housing 12 protrudes from the drive mechanism housing 11. The direction is defined as a downward direction, and the opposite direction is defined as an upward direction. Further, a direction orthogonal to the front-rear direction and the vertical direction is defined as a left-right direction.

  The handle 15 is generally formed in a substantially C shape in a side view, and both ends are connected to the main body housing 10. The handle 15 has a grip 16 that is gripped by a user. The grip portion 16 is disposed at a distance behind the main body housing 10 and extends substantially vertically in such a manner as to intersect the drive shaft A1. A trigger 161 that can be pressed (pulled) by the user is provided at the front of the upper end of the grip 16. A battery mounting portion 171 to which a rechargeable battery (battery pack) 93 as a power source of the motor 2 or the like can be attached and detached is provided below the grip portion 16. In the hammer drill 1, when the trigger 161 is pulled, the motor 2 is driven to perform a hammer operation or a drill operation.

  Hereinafter, the detailed configuration of the hammer drill 1 will be described.

  First, the internal structure of the main body housing 10 (the drive mechanism housing 11 and the motor housing 12) will be described.

  As shown in FIG. 2, the drive mechanism housing portion 11 is a portion of the main body housing 10 extending in the front-rear direction along the drive shaft A1, as described above. The drive mechanism housing section 11 houses the drive mechanism 3 configured to drive the tip tool 91 by the power of the motor 2. In the present embodiment, the drive mechanism 3 includes a motion conversion mechanism 30, a striking element 36, and a rotation transmission mechanism 37. The motion conversion mechanism 30 and the striking element 36 are mechanisms configured to perform a hammer operation for driving the tip tool 91 linearly along the drive axis A1. The rotation transmission mechanism 37 is a mechanism configured to perform a drill operation for driving the tip tool 91 to rotate around the drive axis A1. Since the configurations of the motion conversion mechanism 30, the striking element 36, and the rotation transmitting mechanism 37 are well known, they will be briefly described below.

  The motion conversion mechanism 30 is configured to convert the rotational motion of the motor 2 into a linear motion and transmit the linear motion to the striking element 36. In the present embodiment, the motion conversion mechanism 30 using the swing member 33 is employed. The motion conversion mechanism 30 includes an intermediate shaft 31, a rotating body 32, a swing member 33, and a piston cylinder 35. The intermediate shaft 31 extends below the drive shaft A1 in parallel with the drive shaft A1 (in the front-rear direction). The rotating body 32 is attached to an outer peripheral portion of the intermediate shaft 31. The swing member 33 is attached to the outer periphery of the rotating body 32 and swings in the front-rear direction with the rotation of the rotating body 32. The piston cylinder 35 is formed in a bottomed cylindrical shape, and is supported in a cylindrical sleeve 34 so as to be movable in the front-rear direction. The piston cylinder 35 is reciprocated in the front-rear direction with the swing of the swing member 33. The sleeve 34 is coaxially connected to the rear side of the tool holder 39 and is integrated. The integrated tool holder 39 and the sleeve 34 are rotatably supported around the drive shaft A1.

  The striking element 36 is configured to linearly drive the tip tool 91 along the drive axis A <b> 1 by operating linearly and striking the tip tool 91. In the present embodiment, the striking element 36 includes a striker 361 as a striker and an impact bolt 363 as a meson. The striker 361 is disposed in the piston cylinder 35 so as to be slidable in the direction of the drive shaft A1. The space inside the piston cylinder 35 behind the striker 361 is defined as an air chamber that functions as an air spring. The impact bolt 363 is arranged in the tool holder 39 so as to be slidable in the direction of the drive shaft A1.

  When the motor 2 is driven and the piston cylinder 35 is moved forward, the air in the air chamber is compressed and the internal pressure increases. Therefore, the striker 361 is pushed forward at a high speed and collides with the impact bolt 363 to transmit kinetic energy to the tip tool 91. Thereby, the tip tool 91 is driven linearly along the drive axis A1, and strikes the workpiece. On the other hand, when the piston cylinder 35 is moved rearward, the air in the air chamber expands, the internal pressure decreases, and the striker 361 is drawn rearward. The tip tool 91 moves rearward by being pressed against the workpiece. The motion conversion mechanism 30 and the striking element 36 perform a hammer operation by repeating such operations.

  In the present embodiment, an idle hit prevention mechanism 38 configured to prevent an idle hit operation is disposed in the tool holder 39. The prevention of the idling operation here means that the tip tool 91 is not mounted on the tool holder 39 or the tip tool 91 is not pressed against the workpiece, that is, a state in which no load is applied (hereinafter, a state where no load is applied). , In a no-load state) to prevent the reciprocating operation of the striker 361.

  The idling prevention mechanism 38 of the present embodiment includes a holding member 381 and an O-ring 383. The holding member 381 is an elastic member arranged around the striker 361. The O-ring 383 is disposed in the rear end of the holding member 381. Although a detailed illustration is omitted, when the tip tool 91 is pressed against the workpiece and a load is applied (hereinafter, referred to as a load state), the rear end of the impact bolt 363 pushed to the rear end position becomes , O-ring 383. When the driving of the motor 2 is continued even in the no-load state, as shown in FIG. 2, the front end of the striker 361 pushed forward fits into the O-ring 383 and is gripped by the O-ring 383. It is held at the forefront position. Thereby, the idling operation is prevented. The gripping of the striker 361 by the O-ring 383 (that is, the function of preventing the idle driving operation) is released by the impact bolt 363 being pushed to the rear end position as the tip tool 91 is pushed into the main housing 10.

  The rotation transmission mechanism 37 is configured to transmit the rotational movement of the motor shaft 25 to the tool holder 39. In the present embodiment, the rotation transmission mechanism 37 is configured as a gear reduction mechanism including a plurality of gears, and the rotation of the motor 2 is transmitted to the tool holder 39 after being appropriately reduced in rotation.

  The hammer drill 1 of the present embodiment operates one of three operation modes of a hammer drill mode, a hammer mode, and a drill mode by operating a mode switching dial (not shown) provided on the left side of the drive mechanism housing unit 11. It is configured to be selectable. The hammer drill mode is an operation mode in which the movement conversion mechanism 30 and the rotation transmission mechanism 37 are driven to perform a hammer operation and a drill operation. The hammer mode is an operation mode in which power transmission in the rotation transmission mechanism 37 is interrupted and only the motion conversion mechanism 30 is driven, so that only the hammer operation is performed. The drill mode is an operation mode in which power transmission in the motion conversion mechanism 30 is interrupted and only the rotation transmission mechanism 37 is driven, so that only a drill operation is performed. In the main body housing 10 (specifically, in the drive mechanism accommodating section 11), a mode switching dial is connected, and the motion conversion mechanism 30 and the rotation transmission mechanism 37 are transmitted according to the operation mode selected by the mode switching dial. A mode switching mechanism is provided for switching between the state and the cutoff state. Since the configuration of such a mode switching mechanism is well known, detailed description and illustration thereof are omitted here.

  As shown in FIG. 2, the motor housing 12 is a portion of the main body housing 10 that is connected to the rear end of the drive mechanism housing 11 and extends downward. The motor 2 is housed in the upper part of the motor housing 12. In the present embodiment, a DC brushless motor is used as the motor 2 because of its small size and high output.

  The motor 2 includes a motor body 20 including a stator 21 and a rotor 23, and a motor shaft 25 extending from the rotor 23 and rotating integrally with the rotor 23. The rotation shaft of the motor shaft 25 extends obliquely downward and forward with respect to the drive shaft A1. The upper end of the motor shaft 25 protrudes into the drive mechanism accommodating portion 11, and a small bevel gear 26 is formed at this portion. The small bevel gear 26 meshes with a large bevel gear 311 fixed to the rear end of the intermediate shaft 31.

  A part of the handle 15 (specifically, a lower connecting portion 18) is disposed in a rear portion of a lower portion of the motor housing portion 12 (that is, a region lower than the motor 2).

  Next, a detailed configuration of the handle 15 and an internal structure thereof will be described.

  As shown in FIGS. 3 and 4, the handle 15 includes a grip part 16, a controller housing part 17, a lower connecting part 18, and an upper connecting part 19. In the present embodiment, the handle 15 is configured by connecting left and right divided halves with screws at a plurality of locations in a state where internal components to be described later are assembled.

  As described above, the grip 16 is arranged to extend in the up-down direction, and the trigger 161 is provided at the front of the upper end. Note that the trigger 161 is located on the drive axis A1 (see FIG. 2). The grip 16 is formed in a long cylindrical shape, and a switch 163 is housed inside the grip. The switch 163 is always kept in the off state, and is turned on in response to the pull operation of the trigger 161. The switch 163 is connected to a controller 41 described later by a wiring (not shown), and outputs a signal indicating an on state or an off state to the controller 41.

  The controller housing 17 is connected to the lower side of the lower end of the grip 16. The controller accommodating portion 17 is formed in a rectangular box shape, and extends forward from the grip portion 16. The controller accommodating section 17 accommodates a controller 41 and a speed change dial unit 43.

  Although not shown in detail, the controller 41 includes a control circuit, a three-phase inverter, and a board on which these are mounted. The control circuit includes a microcomputer including a CPU, a ROM, a RAM, a timer, and the like. The three-phase inverter includes a three-phase bridge circuit using six semiconductor switching elements, and performs a switching operation of each switching element of the three-phase bridge circuit in accordance with a duty ratio indicated by a control signal output from the control circuit, so that the motor 2 Drive. Although details will be described later, in the present embodiment, the controller 41 controls the driving of the motor 2 based on the on / off state of the switch 163 and the detection results of various sensors and the like described later.

  The speed change dial unit 43 is a device for receiving the setting of the rotation speed of the motor 2 according to an external operation by the user. Although not shown in detail, the speed change dial unit 43 includes a dial as an operation member that can be turned by the user from the outside of the controller housing 17 and a variable output that outputs a resistance value according to the turning position of the dial. It includes a resistor and a circuit board on which the variable resistor is mounted. The speed change dial unit 43 is connected to the controller 41 by a wiring (not shown), and outputs a signal indicating a resistance value (that is, a set rotation speed) according to the turning operation of the dial to the controller 41. Although the details will be described later, in the present embodiment, the rotation speed set by the speed change dial unit 43 is used as the rotation speed of the motor 2 under load.

  The lower end of the controller accommodating portion 17 (below the controller 41) is configured as a battery mounting portion 171 to which the battery 93 can be attached and detached. In the present embodiment, the battery mounting portion 171 is configured so that the battery 93 is mounted from the rear side to the front side. As shown in FIG. 172 are provided. The pair of guide rails 172 project inward from the lower ends of the left and right side walls of the controller housing 17 and extend in the front-rear direction. On the other hand, a pair of side surfaces of the substantially rectangular parallelepiped battery 93 are provided with guide grooves 932 extending in the longitudinal direction of the battery 93, respectively. With the guide rail 172 engaged with the guide groove 932, the battery 93 is slid forward from the rear side to the battery mounting portion 171 and mounted.

  In addition, as shown in FIG. 4, a hook 933 is provided on the upper portion of the battery 93, which is normally urged upward and protrudes from the upper surface, and retracts below the upper surface in response to pressing. The lower surface of the battery mounting portion 171 is provided with a concave portion 173 recessed upward. The hook 933 is retracted downward while the battery 93 is slid. When the hook 933 reaches a position facing the concave portion 173, the hook 933 is urged upward to engage with the concave portion 173. In this manner, the battery 93 is held by the guide rail 172 in the up-down direction while being positioned in the front-rear direction by the engagement of the hook 933 and the concave portion 173. Although not shown in detail, the terminals of the battery 93 and the battery mounting portion 171 are electrically connected at the same time that the battery 93 is mounted on the battery mounting portion 171.

  It is to be noted that there are not only the battery 93 but also a plurality of types having different capacities and sizes that can be attached to and detached from the battery mounting portion 171. In FIG. 1, among the batteries that can be attached to and detached from the battery mounting portion 171, the largest size battery 930 is indicated by a dashed line. The main body housing 10 is configured such that, when the battery 930 is mounted on the battery mounting portion 171, the lower surface of the battery 930 and the lower surface of the main body housing 10 (motor housing portion 12) are flush.

  As shown in FIGS. 3 and 4, the lower connecting portion 18 is a portion of the handle 15 connected to the front end of the controller housing 17 and extending substantially downward. The upper connecting portion 19 is a portion of the handle 15 connected to the upper end of the grip 16 and extending forward. In the present embodiment, the handle 15 is connected to the main body housing 10 via a lower connecting portion 18 and an upper connecting portion 19 so as to be relatively movable. Hereinafter, the connection structure between the lower connection portion 18 and the upper connection portion 19 and the main body housing 10 will be described in detail.

  As shown in FIGS. 2 and 6, the lower connecting portion 18 is arranged so as to protrude into the lower rear end of the motor accommodating portion 12, and the lower rear end of the main body housing 10 (specifically, the motor accommodating portion 12) is a part that is connected to be rotatable relative to a rotation axis A2 extending in the left-right direction. As described above, although the motor 2 is disposed in the upper portion of the motor housing portion 12, there is an empty area below the motor 2. Therefore, in the present embodiment, the lower connecting portion 18 is arranged by utilizing the empty area, and the handle 15 and the motor accommodating portion 12 are connected.

  In the present embodiment, the rotation axis A2 is set below the battery mounting portion 171 (more specifically, the guide rail 172 (see FIG. 5)) in the lower connecting portion 18. Further, as shown in FIG. 4, the rotation axis A2 is set below the center of gravity G of the handle 15 in a state where the battery 93 is mounted on the battery mounting section 171. Note that the center of gravity G of the handle 15 with the battery 93 mounted is substantially at the same position as the guide rail 172 in the vertical direction. As described above, a battery having a size larger than the battery 93 can be mounted on the hammer drill 1. The center of gravity of the handle 15 with the larger battery mounted is slightly lower than the center of gravity G, but the rotation axis A2 is the center of gravity of the handle 15 with the maximum size battery 930 shown in FIG. (Not shown). When the battery 93 or a battery of another size is mounted on the battery mounting portion 171, the rotation axis A2 is disposed on the front side of the battery 93. The rotation axis A <b> 2 is set below and behind the motor body 20. Further, the rotation axis A2 is set immediately below the upper connecting portion 19 (specifically, a central portion of a long hole 193 described later).

  As shown in FIG. 6, the lower connecting portion 18 is provided with a shaft portion 181 extending in the left-right direction between the left and right side walls with the rotation axis A2 as a center axis. The left and right halves forming the handle 15 are provided with two protrusions extending rightward and leftward, respectively, along the rotation axis A2. Then, a shaft portion 181 is formed by connecting these protruding portions with screws. On the outer surfaces of the left and right side walls of the lower connecting portion 18, recesses 183 are provided at positions corresponding to both ends of the shaft portion 181, respectively. The recess 183 is configured as a recess having a circular cross section centered on the rotation axis A2. An annular elastic member 185 is fitted in the recess 183.

  On the other hand, on the inner surface sides of the left and right side walls of the motor accommodating portion 12, there are provided protrusions 121 protruding rightward and leftward, respectively. The protruding portion 121 is formed in a substantially cylindrical shape, and is arranged such that respective axes are located on a straight line extending in the left-right direction. By fitting the distal ends of these protrusions 121 into the elastic member 185 in the concave portion 183, the lower connecting portion 18 and the lower rear end of the motor housing portion 12 are connected via the elastic member 185. I have. The lower connecting portion 18 is connected to the motor accommodating portion 12 so as to be relatively rotatable around the rotation axis A2 by the concave-convex engagement via the elastic member 185. In addition, the lower connecting portion 18 can be moved relative to the motor accommodating portion 12 in all directions of front and rear, left and right, and up and down by the elastic member 185.

  As shown in FIG. 2, the upper connecting portion 19 is disposed so as to protrude into the rear end of the drive mechanism housing 11, and the upper rear end (in detail, It is connected to the drive mechanism housing 11) so as to be relatively movable. In the present embodiment, a compression coil spring is employed as the elastic member 191. The rear end of the elastic member 191 is fitted into a spring receiving portion 190 (see FIG. 4) provided at the front end of the upper connecting portion 19. The front end of the elastic member 191 is in contact with the rear surface of the support wall 111 disposed in the rear end of the drive mechanism housing 11. That is, the elastic member 191 is arranged such that the direction of action of the elastic force substantially coincides with the front-back direction which is the dominant vibration direction during hammer operation.

  As shown in FIG. 4, the upper connecting portion 19 has an elongated hole 193 formed on the rear side of the spring receiving portion 190. The elongated hole 193 is a through hole that penetrates the upper connecting portion 19 in the left-right direction, and is longer in the front-rear direction than in the vertical direction. On the other hand, as shown in FIGS. 2 and 7, a stopper 113 is provided inside the drive mechanism housing 11. The stopper portion 113 is a columnar portion extending in the left-right direction between the left and right side wall portions of the drive mechanism accommodating portion 11, and is inserted into the elongated hole 193.

  When no load is applied, the upper connecting portion 19 is urged by the elastic member 191 in the front-rear direction in a direction away from the main body housing 10 (that is, rearward), and the stopper portion 113 contacts the front end of the elongated hole 193 to connect the upper connecting portion 19. It is held at a position that restricts the rearward movement of the portion 19. The relative position of the upper connecting portion 19 (the handle 15) with respect to the main body housing 10 at this time is referred to as a rearmost position. On the other hand, when the handle 15 is relatively rotated forward around the rotation axis A2, the stopper 113 of the main body housing 10 moves relatively rearward in the elongated hole 193 of the upper connecting portion 19, and , It is possible to move the elongated hole 193 relative to the stopper 113 in the front-rear direction and the vertical direction. As shown in FIG. 8, the upper connecting portion 19 restricts the forward movement of the upper connecting portion 19 by the stopper portion 113 abutting against the rear end of the elongated hole 193 against the urging force of the elastic member 191. It is possible to relatively move forward to the position. The relative position of the upper connecting portion 19 (the handle 15) with respect to the main body housing 10 at this time is referred to as a foremost position.

  Hereinafter, details of the internal structures of the lower connecting portion 18 and the upper connecting portion 19 will be described.

  As shown in FIG. 4, the lower connecting portion 18 accommodates the acceleration sensor unit 47 and is provided with an adapter mounting portion 490 to which the wireless adapter 49 can be attached and detached. The acceleration sensor unit 47 is disposed at the front side of the shaft portion 181 and at the lower end of the lower connection portion 18. The adapter mounting portion 490 is located at the front side of the acceleration sensor unit 47 and at the front end of the lower connection portion 18. Located in the department.

  In the present embodiment, the acceleration sensor unit 47 includes an acceleration sensor having a known configuration, a microcomputer including a CPU, a ROM, a RAM, and the like, and a board on which these are mounted. Although details will be described later, in the present embodiment, when excessive rotation of the main housing 10 around the drive shaft A1 occurs, the drive of the motor 2 is stopped. Therefore, an acceleration as information (physical quantity, index) corresponding to the rotation of the main body housing 10 around the drive axis A1 is detected by the acceleration sensor. The microcomputer appropriately calculates the acceleration detected by the acceleration sensor and determines whether the rotation of the main body housing 10 around the drive axis A1 exceeds a predetermined limit value. When the rotation of the main housing 10 around the drive shaft A1 exceeds a predetermined limit value, a specific signal (error signal) is output to the controller 41.

  The case where the rotation of the main body housing 10 around the drive axis A1 exceeds a predetermined limit value corresponds to a state where the main body housing 10 has excessively rotated around the drive axis A1. In such a state, the tool holder 39 typically falls into a non-rotatable state (also referred to as a locked state or a blocking state) because the tip tool 91 is buried in the workpiece, and the main body housing 10 This occurs when excessive reaction torque acts on the motor.

  Note that the acceleration sensor unit 47 may not include the microcomputer, and may output a signal indicating the detection result of the acceleration sensor to the controller 41 as it is, and the controller 41 may perform the above-described determination. The drive control of the motor 2 based on the signal output from the acceleration sensor unit 47 will be described later in detail.

  As shown in FIG. 9, the adapter mounting section 490 includes a housing section 491 in which the wireless adapter 49 is housed, an insertion port 492 for inserting and removing the wireless adapter 49 in the housing section 491, and a connector (not shown). Including. The insertion port 492 is an opening formed in the right wall of the lower connecting portion 18. Note that the insertion port 492 is normally closed by a removable dustproof cap 493. The wireless adapter 49 is inserted into the housing 491 to the left through the insertion port 492. When the wireless adapter 49 is inserted to the predetermined position of the housing 491, the connector of the adapter mounting section 490 and the connector of the wireless adapter 49 are electrically connected. As described above, the lower connecting portion 18 is disposed in the lower rear end of the motor housing 12. Therefore, as shown in FIGS. 1 and 9, in the right wall portion of the motor housing portion 12, at a position facing the housing portion 491 (insertion port 492), the opening 123 which is slightly larger than the insertion port 492. Is provided. The user can easily insert the wireless adapter 49 from the outside of the motor housing 12 into the housing 491 of the lower connecting portion 18 through the opening 123 as needed.

  The wireless adapter 49 that can be attached to and detached from the adapter mounting section 490 is configured to enable wireless communication with an external device. Although not shown in detail, in the present embodiment, the wireless adapter 49 has a known configuration including a microcomputer including a CPU, a ROM, a RAM, and the like, an antenna, and a connector. When the wireless adapter 49 is mounted on the adapter mounting section 490, it is electrically connected to the controller 41 via a connector. In accordance with a control signal from the controller 41, a predetermined interlocking signal is wirelessly transmitted to a stationary dust collector separate from the hammer drill 1 by using radio waves in a predetermined frequency band.

  Since such a system is publicly known, the controller 41 causes the wireless adapter 49 to transmit an interlock signal while the trigger 161 is pulled and the switch 163 is turned on. The controller of the dust collector is configured to drive the motor of the dust collector while receiving the interlocking signal transmitted from the wireless adapter 49. That is, the user of the hammer drill 1 can operate the dust collector in conjunction with the hammer drill 1 simply by pulling the trigger 161. Note that the wireless adapter 49 is not limited to the one that transmits the interlocking signal to the dust collector, and may be configured to perform wireless communication with another external device (for example, a portable terminal).

  As shown in FIGS. 6 and 7, the upper connecting portion 19 is provided with a position sensor 45 for detecting a relative position of the handle 15 with respect to the main body housing 10. In the present embodiment, a Hall sensor having a Hall element is employed as the position sensor 45. The position sensor 45 is mounted on the substrate 450 and is fixed to the left front end of the upper connecting portion 19 so as to face the left side wall of the main body housing 10 (drive mechanism housing 11). More specifically, the position sensor 45 is disposed at substantially the same position as the rear end of the elastic member 191 in the front-rear direction. A magnet 46 is fixed to the inner surface of the left side wall of the main body housing 10. Each of the position sensors 45 is electrically connected to the controller 41 via a wiring (not shown). When the magnet 46 is arranged within a predetermined detection range, a specific signal (ON signal) is sent to the controller 41. It is configured to output.

  In the present embodiment, as shown in FIG. 7, when the handle 15 is at the rearmost position (initial position) with respect to the main body housing 10, the magnet 46 is disposed within the detection range of the position sensor 45, and 45 outputs an ON signal. When the handle 15 moves forward from the rearmost position with respect to the main body housing 10 and reaches a predetermined position, the magnet 46 separates from the detection range of the position sensor 45, and the position sensor 45 stops outputting the ON signal. . The predetermined position (hereinafter referred to as an off position) is set slightly behind the forefront position shown in FIG. 8, and when the handle 15 is between the off position and the forefront position, the position sensor 45 Does not output an ON signal. Although the details will be described later, the detection result of the position sensor 45 is used for controlling the rotation speed of the motor 2 by the controller 41.

  As described above, the lower end of the handle 15 is connected to the lower rear end of the main body housing 10 so as to be rotatable around the rotation axis A2, while the upper end is elastically connected to the upper rear end of the main body housing 10. It is elastically connected via a member 191. The position of the rotation axis A2 is set below the battery mounting portion 171 (specifically, the guide rail 172). Accordingly, it is possible to effectively suppress the vibration generated in the main body housing 10 due to the driving of the motor 2 and the driving mechanism 3 from being transmitted to the handle 15 (particularly, the grip portion 16).

  Specifically, the drive of the drive mechanism 3 generates vibrations in the front-back direction and the up-down direction in the main body housing 10. On the other hand, while responding to the vibration in the front-rear direction by the relative rotation of the handle 15 about the rotation axis A2, in particular, the control in the drive axis A1 direction (the front-rear direction) caused by the reciprocating drive of the tool bit 91 Dynamic vibration can be absorbed by the elastic member 191. Further, in the present embodiment, the separation distance between the elastic member 191 and the rotation axis A2 is as large as possible by arranging the rotation axis A2 below the battery mounting portion 171. Thereby, the elastic member 191 can efficiently absorb the vibration at a position where the amplitude with respect to the main body housing 10 is large, so that the transmission of the vibration to the grip portion 16 can be effectively suppressed.

  In particular, in the present embodiment, the rotation axis A2 is set directly below the upper connecting portion 19 (specifically, almost immediately below the rear end of the elastic member 191). That is, the fulcrum of rotation and the elastic connection portion are set at substantially the same position in the direction of the drive shaft A1. Further, the elastic member 191 is arranged so as to be able to expand and contract in parallel to the drive shaft A1. For this reason, the longitudinal vibration can be efficiently reduced.

  The position of the rotation axis A2 is set below the center of gravity G of the handlebar in a state where the battery 93 is mounted on the battery mounting portion 171. In the handle 15 whose upper end portion is elastically connected to the main body housing 10 and whose lower end portion is rotatably connected, when the rotation axis A2 is located above the center of gravity G, the handle 15 moves around the rotation axis A2. It is difficult to rotate. On the other hand, in the present embodiment, by disposing the rotation axis A2 below the center of gravity G, the handle 15 can be relatively rotated around the rotation axis A2 in response to the vibration of the main body housing 10, and the gripping is performed. The vibration suppression effect on the part is enhanced.

  Further, in the present embodiment, the protrusion 121 of the motor accommodating portion 12 is fitted to the concave portion 183 of the lower connecting portion 18 via an annular elastic member 185. Therefore, the transmission of the longitudinal and vertical vibrations generated in the main body housing 10 to the handle 15 can also be suppressed by the annular elastic member 185.

  The hammer drill 1 includes a controller 41, a speed change dial unit 43, a position sensor 45, an acceleration sensor unit 47, a wireless adapter 49, and an adapter mounting section 490. Each of them has an electronic component, and protection from vibration is desired. Therefore, by arranging these on the handle 15, appropriate protection from vibration is realized. Note that, in the present embodiment, the lower connecting portion 18 not only connects to the motor accommodating portion 12, but also utilizes the vacant area existing below the motor 2 in the motor accommodating portion 12 to utilize the acceleration sensor unit 47 and the wireless communication. The function of disposing the adapter 49 while protecting it from vibration is also exhibited. Further, by arranging the position sensor 45 on the upper connecting portion 19 adjacent to the elastic member 191, an optimum arrangement for detecting the relative movement of the handle 15 with respect to the main body housing 10 in the front-rear direction is realized.

  Hereinafter, the drive control of the motor 2 by the controller 41 will be described.

  In the present embodiment, so-called soft no-load control is performed by the controller 41 (more specifically, the CPU of the controller 41). The soft no-load control is a drive control method of the motor 2 that drives the motor 2 at a low speed in a no-load state when the switch 163 is in an on state and increases the rotation speed in a no-load state. This is also called rotation control. Hereinafter, the rotation speed of the motor 2 in the no-load state is referred to as a first rotation speed, and the rotation speed of the motor 2 in a load state is referred to as a second rotation speed. In the present embodiment, the controller 41 sets the rotation speed set by the speed change dial unit 43 as the second rotation speed, and sets half the rotation speed of the second rotation speed as the first rotation speed. Then, the motor 2 is driven by setting a duty ratio according to the first rotation speed or the second rotation speed and outputting a control signal to the three-phase inverter.

  In the present embodiment, the detection result of the position sensor 45 is used to determine the no-load state and the load state in the soft no-load control. As described above, the position sensor 45 detects the relative position of the handle 15 with respect to the main body housing 10. In the no-load state, the upper connecting portion 19 is disposed at the rearmost position by the urging force of the elastic member 191 (see FIGS. 2 and 7), and the position sensor 45 detects the magnet 46 and outputs an ON signal. are doing. When the output from the position sensor 45 is on, the controller 41 determines that the motor 2 is in a no-load state. When the switch 163 is turned on from the off state, the controller 41 drives the motor 2 at the first rotation speed. Start. As the motor 2 is driven, the drive mechanism 3 is driven via a mode switching dial (not shown) in accordance with the selected operation mode, and at least one of a hammer operation and a drill operation is performed.

  When the user presses the tip tool 91 against the workpiece while holding the grip portion 16, the handle 15 relatively rotates forward around the rotation axis A 2, and the upper connecting portion 19 causes the elastic member 191 to rotate. While compressing, move forward from the rearmost position. When the upper connecting portion 19 reaches the off position, the position sensor 45 stops outputting the on signal. The controller 41 recognizes a change in the output from the position sensor 45 from on to off as a transition from a no-load state to a load state. When recognizing the transition to the load state during driving of the motor 2 at the first rotation speed, the controller 41 increases the rotation speed of the motor 2 to the second rotation speed. At this time, the controller 41 may immediately increase the rotation speed of the motor 2 to the second rotation speed, or may gradually increase the rotation speed. When the rotation speed is immediately increased, the reciprocating or rotating speed of the tip tool 91 is immediately increased, so that the working efficiency can be improved. On the other hand, when the rotation speed is gradually increased, the reciprocating motion or the rotation speed of the tip tool 91 is gradually increased, so that a good operational feeling can be given to the user. If the switch 163 is turned on while the output from the position sensor 45 is off, the controller 41 starts driving the motor 2 at the second rotation speed. Also in this case, the controller 41 may immediately increase the rotation speed of the motor 2 to the second rotation speed, or may gradually increase the rotation speed.

  In the present embodiment, the handle 15 is moved to the off position at the same time as or after the idle hit prevention function of the idle hit prevention mechanism 38 is released in response to the pushing of the tip tool 91 into the main body housing 10 or after the release. It is configured to be arranged. That is, the handle 15 reaches the off position at the same time as or after the impact bolt 363 is pushed into the rear end position and the striker 361 is separated from the O-ring 383. For this purpose, the specifications (for example, spring constant) of the elastic member 191 are appropriately set. By such timing control, the reciprocating operation of the striker 361 can be started immediately when the rotation speed of the motor 2 is increased to the second rotation speed, and good work efficiency can be secured.

  In addition, the controller 41 recognizes that the output from the position sensor 45 changes from off to on (that is, the upper connecting portion 19 moves rearward from the off position to the rearmost position) when the switch 163 is on. Sometimes, a timer monitors the duration of the ON state. Then, the rotation speed of the motor 2 is returned to the first rotation speed only when the ON state continues for a predetermined time (in the present embodiment, a time longer than zero). This is for surely distinguishing between a temporary change to the ON state when the main body housing 10 is vibrating with the machining operation and a change from the load state to the no-load state. Specifically, the upper connecting portion 19 reciprocates in the front-rear direction with respect to the main body housing 10 due to the front-rear vibration of the main body housing 10. In this case, the output from the position sensor 45 switches between ON and OFF in a short cycle. On the other hand, when the pressing of the tip tool 91 is released and the state shifts to the no-load state, the output from the position sensor 45 switches from off to on, and then the on state continues for a predetermined time. Therefore, in the present embodiment, the above-described control is employed.

  Regardless of whether the motor 2 is driven at the first rotation speed or when the motor 2 is driven at the second rotation speed, when the pulling operation of the trigger 161 is released and the switch 163 is turned off, the controller 41 2 is stopped.

  Further, in the present embodiment, control based on the detection result of the acceleration sensor unit 47 is performed in addition to the soft no-load control. More specifically, the controller 41 recognizes the error signal output from the acceleration sensor unit 47 regardless of whether the motor 2 is driven at the first rotation speed or the second rotation speed. In this case, the driving of the motor 2 is stopped. As described above, the error signal indicates excessive rotation of the main body housing 10 around the drive axis A1. Therefore, when the excessive rotation is caused by the locked state of the tool holder 39, the rotation is prevented from being performed further. The controller 41 determines whether excessive rotation has occurred based on other information (for example, the torque acting on the tip tool 91 and the drive current of the motor 2) in addition to the error signal. Is also good. Further, it is preferable that the controller 41 not only stop the energization of the motor 2 but also electrically brake the motor 2 in order to prevent the rotation of the motor shaft 25 from continuing due to the inertia of the rotor 23.

  As described above, according to the drive control of the motor 2 of the present embodiment, the transition from the no-load state to the load state is appropriately detected based on the relative position of the handle 15 detected by the position sensor 45. , The rotation speed of the motor 2 can be increased. This prevents the motor 2 from being unnecessarily driven at a high speed when the tip tool 91 is not hitting the workpiece, suppresses the vibration of the main body housing 10 and the consumption of the battery 93. it can. In particular, in the present embodiment, the first rotation speed at the time of no load is set to one half of the second rotation speed at the time of load, so that the consumption of the battery 93 in the no-load state can be more effectively suppressed. .

  The above embodiment is merely an example, and the power tool according to the present invention is not limited to the illustrated configuration of the hammer drill 1. For example, the changes exemplified below can be added. In addition, these changes can be adopted by combining any one or more of them with the hammer drill 1 shown in the embodiment or the invention described in each claim.

  In the above embodiment, the hammer drill 1 is exemplified as the work tool configured to reciprocate the tip tool 9 linearly, but the present invention is also applicable to, for example, an electric hammer or a reciprocating saw. The configuration and the positional relationship of the motor 2, the drive mechanism 3, the main body housing accommodating the motor 2 and the drive mechanism 3, and the handle 15 having the grip 16 can be appropriately changed depending on the work tool.

  The connection mode between the main body housing 10 and the handle 15 can be appropriately changed. For example, the elastic member 191 is not limited to a compression coil spring, and may be made of, for example, rubber, synthetic resin, or the like, or may be made of a plurality of elastic members. The arrangement position may be changed. The lower connecting portion 18 and the motor housing portion 12 may be connected by, for example, a shaft extending in the left-right direction. Note that the elastic member 185 may be omitted. The elastic member 185 may have a shape other than an annular shape, and instead of a single elastic member 185, a plurality of elastic members may be provided separately from each other around the rotation axis A2. As long as the rotation axis A2 is located below the battery mounting portion 171 or below the center of gravity of the handle 15 in a state where the battery is mounted, the rotation axis A2 is arranged at a position different from that exemplified in the above embodiment. May be done.

  In the above-described embodiment, an example in which devices having various electronic components are disposed on the handle 15 has been described. However, these devices may be omitted or prevented from being disposed on the main body housing 10. is not.

  The correspondence between the components of the above-described embodiment and modified examples and the components of the present invention will be described below. The hammer drill 1 is an example of the “work tool” of the present invention. The tip tool 91 is an example of the “tip tool” of the present invention. The motor 2 is an example of the “motor” of the present invention. The drive mechanism 3 is an example of the “drive mechanism” of the present invention. The drive shaft A1 is an example of the “drive shaft” of the present invention. The main body housing 10 is an example of the “main body housing” of the present invention. The handle 15, the grip 16, and the battery mount 171 are examples of the "handle", "grip", and "battery mount" of the present invention, respectively. The battery 93 is an example of the “battery” of the present invention. The upper connecting portion 19 is an example of the “upper end portion of the handle” of the present invention. The elastic member 191 is an example of the “elastic member” of the present invention. The lower connecting portion 18 is an example of the “lower end portion of the handle” of the present invention. The rotation axis A2 is an example of the “rotation axis” of the present invention.

  The motor body 20, the stator 21, the rotor 23, and the motor shaft 25 are examples of the "motor body", "stator", "rotor", and "motor shaft" of the present invention, respectively. The speed change dial unit 43 is an example of the “speed setting unit” of the present invention. The wireless adapter 49 is an example of the “wireless unit” of the present invention. The housing 491 and the opening 123 are examples of the “housing” and “opening” of the present invention, respectively. The position sensor 45 is an example of the “first detector” of the present invention. The acceleration sensor unit 47 is an example of the “second detector” of the present invention.

Further, in view of the present invention and the gist of the above embodiment, the following aspects are constructed. The following aspects can be adopted in combination with the hammer drill 1 shown in the embodiment and the above-mentioned modified examples, or the invention described in each claim.
[Aspect 1]
The rotating shaft is located below the battery mounting portion and below the center of gravity of the handle with the battery mounted.
[Aspect 2]
The rotation shaft is located at substantially the same position as the elastic member in the front-rear direction.
[Aspect 3]
The lower end of the handle is disposed within the body housing;
An electronic component is arranged at the lower end of the handle.
[Aspect 4]
The lower end of the handle is disposed in a region below the motor in the body housing.
[Aspect 5]
The upper end of the handle is connected to the rear end via the elastic member above the drive shaft.
[Aspect 6]
The lower end of the handle is connected to the rear end of the main body housing via an elastic member disposed around the rotation axis.

1: Hammer drill 10: Main body housing 11: Drive mechanism housing 111: Support wall 113: Stopper 12: Motor housing 121: Projection 123: Opening 15: Handle 16: Handle 161: Trigger 163: Switch 17: Controller Housing part 171: battery mounting part 172: guide rail 173: concave part 18: lower connecting part 181: shaft part 183: concave part 185: elastic member 19: upper connecting part 190: spring receiving part 191: elastic member 193: elongated hole 2 : Motor 20: motor main body 21: stator 23: rotor 25: motor shaft 26: small bevel gear 3: drive mechanism 30: motion conversion mechanism 31: intermediate shaft 311: large bevel gear 32: rotating body 33: swing member 34: sleeve 35: piston cylinder 36: striking element 361: striker 363: impactbo G: Rotation transmission mechanism 38: Idling prevention mechanism 381: Holding member 383: O-ring 39: Tool holder 41: Controller 43: Speed change dial unit 45: Position sensor 450: Substrate 46: Magnet 47: Acceleration sensor unit 49: Wireless Adapter 490: Adapter mounting section 491: Housing section 492: Insertion port 493: Cap 91: Tip tool 93: Battery 930: Battery 932: Guide groove 933: Hook 95: Auxiliary handle A1: Drive axis A2: Rotating axis G: Center of gravity

Claims (10)

A work tool configured to perform a machining operation by driving a tip tool,
Motor and
A drive mechanism configured to be capable of performing an operation of linearly reciprocating the tip tool along a drive shaft extending in the front-rear direction of the power tool by the power of the motor,
A body housing that houses the motor and the drive mechanism;
A grip portion extending substantially vertically in a direction intersecting with the drive shaft, and a handle provided below the grip portion and including a battery mounting portion to which a battery can be attached and detached,
An upper end of the handle is connected to a rear end of the main body housing via an elastic member so as to be relatively movable,
A lower end of the handle is connected to the rear end of the main body housing so as to be relatively rotatable around a rotation axis extending in the left-right direction,
The power tool according to claim 1, wherein the rotating shaft is located below the battery mounting portion. The power tool according to claim 1,
The power tool according to claim 1, wherein the rotating shaft is located in front of the battery when the battery is mounted on the battery mounting portion. The power tool according to claim 1 or 2,
The motor includes a motor body including a stator and a rotor, and a motor shaft extending from the rotor and rotating integrally with the rotor,
The motor is arranged such that a rotation axis of the motor shaft intersects the drive shaft,
The power tool according to claim 1, wherein the rotating shaft is located below the motor body. The power tool according to any one of claims 1 to 3,
A speed setting unit that receives a setting of a rotation speed of the motor according to an external operation by a user,
The power tool, wherein the speed setting unit is provided on the handle. The power tool according to any one of claims 1 to 4,
Further comprising a wireless unit capable of wireless communication with an external device,
The work tool, wherein the wireless unit is provided on the handle. The power tool according to claim 5,
The handle is partially disposed within the body housing;
The wireless unit is detachable from a housing portion formed in a portion of the handle disposed in the main body housing,
The power tool according to claim 1, wherein the main body housing is provided to face the housing portion, and has an opening through which the wireless unit can pass. The power tool according to any one of claims 1 to 6,
A first detection unit that can detect a relative position of the handle with respect to the main body housing,
The power tool according to claim 1, wherein the first detector is provided on the handle. The power tool according to any one of claims 1 to 7,
The drive mechanism is further configured to be capable of performing an operation of rotating the tip tool around the drive shaft by the power of the motor,
A second detection unit that can detect a motion state of the main body housing around the drive shaft,
The power tool, wherein the second detection unit is provided on the handle. The power tool according to any one of claims 1 to 8,
A power tool, further comprising a battery mounted on the battery mounting portion. A work tool configured to perform a machining operation by driving a tip tool,
Motor and
A drive mechanism configured to be capable of performing a reciprocating operation of linearly reciprocating the tip tool along a drive shaft extending in the front-rear direction of the power tool by the power of the motor,
A body housing that houses the motor and the drive mechanism;
A grip portion that intersects the drive shaft and extends in a substantially vertical direction, and a handle including a battery mounting portion provided below the grip portion,
A battery removably mounted on the battery mounting portion,
An upper end of the handle is connected to a rear end of the main body housing via an elastic member so as to be relatively movable,
The lower end of the handle is connected to the rear end of the main body housing so as to be relatively rotatable around a rotation axis extending in the left-right direction,
The power tool according to claim 1, wherein the rotating shaft is located below a center of gravity of the handle with the battery mounted.

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