JP7042575B2 - Work tools - Google Patents

Description

The present invention relates to, for example, a work tool called a hammer drill.

A work tool called a so-called hammer drill rotates a bit attached to an output shaft (tool holder) around the shaft (drill operation), or applies a striking force in the axial direction (hammer operation), or outputs a combination of both. It is a possible tool, and by using it, concrete chipping work and drilling work can be performed quickly and easily. The following Patent Document 1 discloses a technique relating to a power tool that can use a rechargeable battery pack as a power source.

Japanese Patent No. 4102071

However, even if it is a hand-held tool, in a relatively large model, if the battery pack that can be attached is also made larger, the weight becomes heavier and the merit as a hand-held tool becomes smaller. In particular, for hammer drills that perform work by giving rotation and striking movements to a drill bit attached as a tip tool, it is difficult to work for a long time with a small battery because the power consumption is relatively large, and a sufficient amount of work is required. If a large battery pack is attached to secure the power, the convenience as a hand-held tool is greatly impaired in the first place.

An object of the present invention is to enable a work tool that operates using a DC power source as a power source to receive a large power supply for a long time to perform work.

The above problems are solved by the following inventions. According to the first invention, the operation mode can be switched between a striking mode in which an axial striking motion is given to a tip tool attached to an output shaft and a drilling mode in which a tip tool is given a rotational motion around the axis. Work tool. The work tool according to the first invention includes a battery mounting portion for mounting a battery pack as a power source. Instead of the battery pack, a power adapter capable of converting AC power into DC power and supplying the battery can be attached to the battery mounting portion. Further, the seventh invention is a power supply device used for the work tool according to the first invention.

According to the first invention or the seventh invention, the work tool can be used by attaching the battery pack to the battery mounting portion. Further, the work tool can be used by attaching a power adapter to the battery mounting portion instead of the battery pack. The power adapter can supply the DC power converted from the AC power to the work tool. Therefore, when the power adapter is attached to the battery mounting portion, sufficient power is supplied to the work tool substantially without time limitation. According to this, for example, for a hammer drill as a work tool, either a hammer drill mode that outputs a combination of rotational motion and axial striking motion to a tip tool, or a chipping mode that outputs only axial striking motion without rotational motion. Even in the case of, it is possible to continue various operations by continuously supplying a relatively large amount of power without being restricted by time.

In particular, since it is relatively common to perform continuous work for a long time in the chipping mode, it is desirable to use an AC power supply that can supply stable power for a long time. On the other hand, in the hammer drill mode, work may be performed in a relatively cramped posture such as the working posture facing upward. In this case, the DC power supply (battery pack) can be used as the power supply so that the power cord does not get in the way. desirable. As described above, the first invention has great significance in that the DC power supply and the AC power supply can be selected according to the work content for the hammer drill whose mode can be switched between the hammer drill mode and the chipping mode.

The second invention is, in the first invention, the power adapter is a work tool connected to a power conversion device that converts an AC power source into a DC power source.

According to the second invention, the power conversion device can be separated from the work tool by weight. The power adapter is connected to the power converter side, for example, via an adapter cord, and both are configured as separate bodies, and thus are separated in terms of weight. Therefore, the weight of the power adapter is increased only by the weight of the power adapter, and the weight of the power conversion device is not added to the work tool side, so that the operability and workability of the work tool cannot be impaired.

A third aspect of the present invention, in the first or second invention, comprises a drive mechanism for giving a striking motion and a rotary motion to the tip tool, and a handle portion gripped by the user, between the drive mechanism and the handle portion. It is a work tool that has a vibration isolation mechanism for absorbing vibration generated by the operation of the drive mechanism and has a battery mounting portion on the handle portion side.

According to the third invention, the transmission of the vibration generated by the drive mechanism to the handle portion side is blocked by the vibration isolation mechanism. Since vibration to the battery mounting portion side is suppressed, so-called chattering can be prevented.

According to the fourth aspect of the present invention, in the second or third invention, the power adapter can be connected to the power conversion device by selecting a plurality of types having different output voltages mainly, and the connected power adapter and power conversion device. It is a work tool having a configuration capable of transmitting and receiving information mainly related to the output voltage of the power adapter and supplying a DC power supply having an appropriate voltage from the power adapter. Further, the eighth invention is a power supply device used for the work tool according to the fourth invention.

According to the fourth or eighth invention, for example, when a power adapter for 36V output is connected to the power conversion device, the power adapter automatically informs the power conversion device that the output voltage is 36V. Will be sent. Based on this, in the power conversion device, for example, a commercial AC 100V power supply is converted into a DC 36V power supply and output to the power adapter side. In addition to the above 36V output, a plurality of types of power adapters having different output voltages such as 18V and 58V outputs can be prepared. When multiple types of power adapters that differ mainly in terms of output voltage are arbitrarily selected and attached, the power adapter automatically sends information on the appropriate output voltage to the attached power adapter to the power converter, and the output voltage is changed. Optimization is achieved, and in this respect, the functions of the power adapter and the power conversion device can be further enhanced.

According to a fifth aspect of the invention, in any one of the second to fourth inventions, the power conversion device is a work tool provided with an output display unit.

According to the fifth invention, the functions of the power adapter and the power conversion device can be further enhanced by displaying information on the output DC power supply, for example, on the output display unit.

A sixth aspect of the invention is the case where power is supplied by attaching a battery pack to the battery mounting portion and the case where power is supplied by attaching a power adapter to the battery mounting portion in any one of the first to fifth inventions. It is a work tool configured to switch the operating state.

According to the sixth invention, when the battery pack is attached to the battery attachment portion, the amount of electric power (operating time) that can be supplied is restricted. Therefore, for example, the work tool is operated in the energy saving mode for a long time. When working is realized and a power adapter is attached to the battery mounting part to convert commercial AC power to DC power and supplied, the work tool is placed in high-spec mode because there is virtually no restriction on the amount of power. It can be operated with the power supply to quickly perform high-load work. As described above, the function of the work tool can be further enhanced by switching the operation mode of the work tool depending on whether the power is supplied from the battery pack or the power adapter.

It is the whole vertical sectional view of the work tool which concerns on embodiment of this invention. In this figure, the state where the battery pack is attached to the battery attachment portion is shown. It is the whole vertical sectional view of the work tool which concerns on embodiment of this invention. In this figure, the state where the power adapter is attached to the battery attachment part is shown. It is a figure which shows the state which the adapter cord was removed from the power adapter. It is an overall schematic diagram of the power supply set case accommodating the power adapter and the like which concerns on this embodiment.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIGS. 1 and 2, in this embodiment, a so-called hammer drill is exemplified as an example of the work tool 1. The work tool 1 is a relatively large hand-held tool, and includes a tool main body portion 10 having a built-in drive mechanism and a handle portion 40 gripped by the user. An anti-vibration mechanism 2 is interposed between the tool main body 10 and the handle 40, and the two are provided with an anti-vibration structure elastically supported by each other instead of being rigidly connected. The anti-vibration mechanism 2 is interposed at two locations on the front side and the upper side of the handle portion 40. The anti-vibration mechanism 2 is mainly composed of a compression coil spring, and has a function of absorbing vibration generated on the drive mechanism side of the tool body 10 and suppressing vibration transmission to the handle 40 side.

The tool main body 10 accommodates a drive mechanism in the main body housing 24 that uses an electric motor 11 as a drive source and gives a rotational operation and an axial striking operation to the tip tool B attached to the tool holder 30 as an output shaft. It has a configuration. In the present embodiment, the drive mechanism does not need to be changed in particular, but will be briefly described below. As the electric motor 11, a DC brushless motor operated by a DC power source is used. The electric motor 11 is housed in a vertical posture in which the axis (motor axis) of the output shaft 11b is aligned in the vertical direction. The rotational output of the electric motor 11 is branched and transmitted to a first power transmission path for generating a striking force and a second power transmission path for generating a rotational operation. A cooling fan 11c is attached to the output shaft 11b of the electric motor 11. The rotation of the cooling fan 11c introduces outside air into the main body housing 24 to cool the electric motor 11 and the like. A drive gear portion 11a is provided on the upper portion of the output shaft 11b. The driven gear 12 of the first power transmission path and the driven gear 13 of the second power transmission path are meshed with the drive gear portion 11a.

The driven gear 12 of the first power transmission path is fixed to the impact drive shaft 14. The impact drive shaft 14 is provided with an eccentric shaft 15. The eccentric shaft 15 is provided so as to be eccentric with respect to the rotation axis of the impact drive shaft 14 by a certain distance. The impact drive shaft 14 is rotatably supported by the mechanism frame 17 via a bearing 16. The mechanism frame 17 is fixed to the inside of the main body case 24.

The rear portion of the connecting rod 25 is connected to the eccentric shaft 15 so as to be relatively rotatable. A piston 20 is integrally provided on the front portion of the connecting rod 25. The piston 20 is airtightly housed on the inner peripheral side of the cylinder 21. The striking block 22 is also airtightly housed on the inner peripheral side of the cylinder 21 in front of the piston 20. A pressure chamber 23 is formed on the inner peripheral side of the cylinder 21 between the piston 20 and the striking block 22. The cylinder 21 is integrally supported by the mechanism frame 17 with its axis oriented in the front-rear direction.

A tool holder 30 for attaching the tip tool B is supported mainly in front of the cylinder 21. The tool holder 30 is a member having a substantially cylindrical shape, and is rotatably supported around the same axis as the cylinder 21. A striking hammer 31 is housed on the inner peripheral side of the tool holder 30 so as to be displaceable in the axial direction. The piston 20 reciprocates back and forth due to the displacement component in the front-rear direction of the eccentric shaft 15 generated by the activation of the electric motor 11 and the rotation of the impact drive shaft 14. The pressure chamber 23 is compressed by the reciprocating movement of the piston 20, so that the striking block 22 is impacted on the rear end portion of the striking hammer 31. The tip tool B such as a drill bit or a chipping bit is hit in the axial direction through the hitting hammer 31.

The driven gear 13 of the second power transmission path is fixed to the rotary drive shaft 18. The rotation drive shaft 18 is rotatably supported by the mechanism frame 17 via the upper and lower bearings 18a and 18b. A drive-side bevel gear 18c is integrally provided on the upper portion of the rotary drive shaft 18. The drive-side bevel gear 18c is meshed with the cylindrical driven-side bevel gear 19. The driven side bevel gear 19 is rotatably supported by the mechanism frame 17 on the rear outer peripheral side of the tool holder 30.

An annular switching member is spline-coupled to the outer peripheral side of the rear portion of the tool holder 30. Therefore, the switching member 32 is supported so as to be displaced in the axial direction (front-back direction) with respect to the outer periphery of the rear portion of the tool holder 30, and is supported in a state of being integrated with the tool holder 30 in terms of axial rotation. ing. As shown in FIG. 1, when the switching member 32 is displaced rearward and meshes with the driven side bevel gear 19 in terms of rotation, the rotation of the driven side bevel gear 19 is transmitted to the tool holder 30 via the switching member 32. (Rotation motion transmission position). Therefore, the state shown in the figure is a state in which the tip tool B is switched to the hammer drill mode, which is given by combining the impact in the axial direction and the rotational movement around the axis.

On the other hand, as shown in FIG. 2, when the switching member 32 is displaced to the front side and the meshing with the driven side bevel gear 19 is disengaged, the driven side bevel gear 19 slips and the rotational operation is not transmitted to the tool holder 30. (Rotation operation cutoff position). In this case, the switching member 32 is engaged with the rotation lock member 33 side, and the rotation around the axis is locked. In this rotation lock state, the rotation operation around the axis of the tool holder 30 is locked, and the tip tool B is switched to the impact mode (chipping mode) in which only the impact operation in the axial direction is given.

Switching between the hammer drill mode and the striking mode is performed by the mode switching dial 36 provided on the upper surface of the tool body 10. By rotating the mode switching dial 36, the intermediate lever 34 is displaced back and forth, so that the switching member 32 moves between the front rotation operation cutoff position (striking mode) and the rear rotation operation transmission position (hammer drill mode). Displace.

A mounting hole 30a for inserting the tip tool B is provided in the front portion of the tool holder 30. Holder pieces 30b are provided at two locations around the mounting holes 30a. A state in which the tip tool B is prevented from coming off from the mounting hole 30a and is mounted so that rotational power can be transmitted by the two holder pieces 30b projecting to the inner peripheral side and engaging with the engaging groove of the tip tool B. Will be. An operation sleeve 35 is provided around the tool holder 30 on the front side of the main body case 24 so as to be movable back and forth. When the operation sleeve 35 is slid backward, the holder piece 30b is disengaged and the tip tool B can be pulled out from the mounting hole 30a of the tool holder 30.

The handle portion 40 has a loop shape straddling between the upper portion on the rear side and the lower portion on the rear side of the tool body portion 10. The handle portion 40 includes a grip portion 41 that the user actually grips and a pedestal portion 45. The grip portion 41 is provided so as to extend upward from the rear portion of the pedestal portion 45. The upper portion of the grip portion 41 is connected to the upper portion on the rear side via the vibration isolator mechanism 2 of the tool main body portion 10. A battery mounting portion 42 for mounting the battery pack 50 as a power source is provided on the lower surface side of the pedestal portion 45. The vibration isolator 2 is interposed between the front upper portion of the pedestal portion 45 and the rear lower portion of the tool body portion 10.

A large switch lever 43 is provided on the front surface (inside the loop) of the grip portion 41. A switch body 44 is built in the rear side of the switch lever 43. When the switch lever 43 is pulled backward by the fingertip of the hand holding the grip portion 41, the switch body 44 is turned on and the electric motor 11 is started.

The battery mounting portion 42 is a portion for mechanically and electrically connecting the so-called slide mounting type battery pack 50, and includes a pair of left and right rail receiving portions and positive and negative power supply terminals. The battery pack 50 is a lithium-ion battery in which a plurality of battery cells are housed in a rectangular case having six faces, and in the present embodiment, a battery pack having a rated voltage of 36 V can be attached. The battery pack 50 is a highly versatile one that can also be used as a power source for other power tools such as screw tightening tools and cutting tools, and can be repeatedly used by charging with a separately prepared charger. For example, if a work tool for attaching a larger and higher output battery pack of 50 V or more is applied with the power adapter and the power conversion device exemplified, a great advantage in weight reduction can be obtained.

A pair of left and right rail portions 50a are provided on the upper surface of the battery pack 50. Although not visible in the figure, a terminal receiving portion for inserting the positive and negative power supply terminals is provided between the left and right rail portions 50a. The battery pack 50 can be attached to the battery mounting portion 42 by sliding the battery pack 50 from the rear to the front with respect to the battery mounting portion 42. When the battery pack 50 is attached to the battery attachment portion 42, the electric power can be supplied to the tool body portion 10 side. As shown in the figure, the battery pack 50 is mounted in a suspended state in which the upper surface thereof is coupled along the battery mounting portion 42. The lower surface of the battery pack 50 attached as shown in FIG. 1 is in a state corresponding to the lower surface of the pedestal portion 45. The work tool 1 can be installed in an upright state by grounding the lower surface of the battery pack 50 and the lower surface of the pedestal portion 45 to the installation surface. Since the relatively heavy battery pack 50 can function as a part of the pedestal portion, the work tool 1 can be installed in a more stable posture.

A controller formed by resin-molding a control board 46a mainly for controlling the operation of the electric motor 11 in a shallow aluminum case above the battery mounting portion 42 and above the pedestal portion 45. 46 is housed. The controller 46 has a flat plate shape, and is held in a horizontal posture in which the plate thickness direction is along the vertical direction and the longitudinal direction thereof is along the battery mounting direction. The controller 46 is cooled by the outside air introduced by the rotation of the cooling fan 11c of the electric motor 11.

A luminaire 47 is provided on the front surface of the pedestal portion 45. The illuminating tool 47 brightly illuminates the machined portion in the vicinity of the front end portion of the tool body portion 10 so that the work in a dark place can be efficiently performed.

The power adapter 60 can be attached to the battery attachment portion 42 in place of the battery pack 50 described above. The power adapter 60 has a substantially rectangular parallelepiped shape having a hexahedron of the battery pack 50 as well. The upper surface of the power adapter 60 is provided with a pair of left and right rail portions 60c and positive and negative power terminal receiving portions (not visible in the figure). Similar to the battery pack 50, the power adapter 60 can be attached to the battery mounting portion 42 in a suspended state by sliding the power adapter 60 from the rear to the front with respect to the battery mounting portion 42. When the power adapter 60 is mechanically attached to the battery mounting portion 42 mainly by the left and right rail portions 60c, the power terminal on the battery mounting portion 42 side is inserted into the positive and negative power terminal receiving portions and is electrically connected. Will be. As described above, the power adapter 60 has the same configuration as the battery pack 50 in terms of the mechanical coupling structure to the battery mounting portion 42 or the electrical connection structure for power supply.

Unlike the battery pack 50, the power adapter 60 does not have a plurality of battery cells built-in. Therefore, although the power adapter 60 itself does not have the ability to supply electric power, the power adapter 60 is significantly lighter than the battery pack 50 by the amount of the battery cell. Legs 60a are provided on the front portion and the rear portion on the lower surface side of the power adapter 60, respectively. The lower portion of the leg portion 60a coincides with the lower surface of the pedestal portion 45. Therefore, the front and rear legs 60a function as legs when the work tool 1 is installed in an upright position, similarly to the lower surface of the battery pack 50.

The power adapter 60 is connected to the power conversion device 61 via the adapter cord 62. As shown in FIG. 3, the adapter cord 62 is detachably connected to the rear surface of the power adapter 60. The front portion of the adapter cord 62 is provided with a coupling sleeve 62a having a non-slip treatment on the outer peripheral surface and an insertion portion 62b. The insertion portion 62b is provided with an L-shaped engaging groove 62c. By inserting the insertion portion 62b into the cord connection portion 60b provided on the rear surface of the power adapter 60 and rotating it by a certain angle around the axis, the engaging protrusion (not visible in the figure) provided on the cord connection portion 60b side is engaged. The adapter cord 62 is prevented from coming off by being engaged with the joint groove 62c. The adapter cord 62 is connected to the rear surface of the power adapter 60 by screwing the coupling sleeve 62a to the male threaded portion (not visible in the figure) on the cord connecting portion 60b side in this retaining state.

The power conversion device 61 has a function of converting an AC power source into a DC power source and outputting the AC power source. A power cord 63 for an AC 100V power supply is connected to the power conversion device 61. For example, a commercial 100V AC power supply is supplied to the power conversion device 61 via the power cord 63. In the power conversion device 61, the supplied AC 100V power supply is converted to DC 36V. The converted DC power supply is supplied to the power adapter 60 via the adapter cord 62. A DC 18V power supply is supplied to the work tool 1 via the power adapter 60.

The power conversion device 61 has a structure in which a circuit board 61b for power conversion is built in a rectangular flat plate-shaped case 61a. In the circuit board 61b, the AC 100V power supply is converted into the DC 36V power supply. The converted DC 36V power supply is output to the power adapter 60 via the adapter cord 62. A carrying handle 61c is provided in the center of the upper surface of the case 61a. According to the power conversion device 61, the AC 100V power supply is a converted DC 36V power supply, and the same power supply as the battery pack 50 is supplied from the power adapter 60 to the work tool 1. Therefore, by using the power conversion device 61, the work tool 1 can be continuously operated without being substantially time-constrained, and by extension, a long-time chipping work or the like can be efficiently performed.

The side portion of the power conversion device 61 is provided with an output display unit 61d for displaying information mainly related to the DC power supply to be output. In this embodiment, four LED indicator lights are provided as the output display unit 61d. By turning on or blinking one or more LED indicators, information regarding whether or not the output DC power supply has reached an appropriate voltage is notified.

Further, in the present embodiment, a plurality of types of power adapters 60 are prepared mainly for output voltage. Only one type of power adapter 60 is shown in the figure. When a power adapter arbitrarily selected by the user is connected to the power conversion device 61, information regarding the output voltage of the power adapter is mainly transmitted and received between the power adapter and the power conversion device 61. The adapter cord 62 includes, in addition to the power supply line 62d for power supply, a signal line 62e for transmitting and receiving electronic data between the power adapter and the power conversion device 61. As a result, in the power conversion device 61, the AC power supply is converted into an output voltage suitable for the connected power adapter and supplied to the power adapter side. For example, when the power adapter 60 for 36V output is connected to the power conversion device 61 via the adapter cord 62, information that the output voltage is 36V is automatically transmitted from the power adapter 60 to the power conversion device 61. To. Based on this, in the power conversion device 61, a commercial AC 100V power supply is converted into a DC 36V power supply and output to the power adapter 60 side. The power adapter 60 can be prepared in advance with an output voltage of 36 V, 18 V, 58 V, or the like.

Further, the battery mounting portion 42 determines whether the battery pack 50 or the power adapter 60 is mounted. The determination is executed by transmitting and receiving electronic data to and from the controller 46. In the present embodiment, the output of the electric motor 11 changes depending on whether the battery pack 50 is attached to the battery attachment portion 42 or the power adapter 60 is attached, and the operation mode of the work tool 1 is "energy saving mode". And "high spec mode (high output mode)" are automatically switched. This automatic mode switching is performed independently of the operation mode switching by the operation of the mode switching dial 36 described above. When the power adapter 60 is connected to the battery mounting portion 42, a mode switching signal is transmitted from the power conversion device 61 to the controller 46 via the power adapter 60 and the adapter cord 62. In the state where the mode switching signal is transmitted to the controller 46, the electric motor 11 operates at the maximum output because the power that can be consumed is not time-constrained, whereby the work tool 1 operates in the high-spec mode. By operating the work tool 1 in the high-spec mode, it is possible to perform quick work in both the hammer drill mode and the chipping mode.

When the battery pack 50 is attached to the battery attachment portion 42, the mode switching signal is not received by the controller 46, and as a result, the electric motor 11 is time-constrained in terms of the power that can be consumed. It operates, and therefore the work tool 1 operates in the energy saving mode. By operating the work tool 1 in the energy saving mode, relatively light work can be continuously performed for a long time in both the hammer drill mode and the chipping mode.

FIG. 4 shows a power supply set case 70 for the work tool 1. The power supply set case 70 can accommodate one battery pack 50, one power adapter 60, a power conversion device 61, and an adapter cord 62. Further, the power supply set case 70 can also store a charger 51 for charging the battery pack 50. Since these various ancillary equipment can be stored and carried in one power supply set case 70, the convenience and added value of the work tool 1 can be further enhanced.

According to the work tool 1 of the present embodiment configured as described above, the work tool 1 can be used by attaching the battery pack 50 to the battery mounting portion 42. Further, the work tool 1 can be used by attaching the power adapter 60 to the battery mounting portion 42 instead of the battery pack 50. The power adapter 60 can supply a DC 36V power supply converted from an AC 100V power supply to the work tool. Therefore, in a state where the power adapter 60 is attached to the battery mounting portion 42, sufficient power is supplied to the work tool 1 substantially without being restricted by time. According to this, in either the hammer drill mode in which the tip tool B is output by combining the rotational motion and the striking motion in the axial direction, or the chipping mode in which only the striking motion in the axial direction is output without the rotational motion. It is possible to continue various kinds of work without being restricted by time with a relatively large power supply, thereby improving the workability of the work tool 1.

In particular, according to the illustrated embodiment, the work tool 1 as a DC machine (cordless) using the battery pack 50 as a power source or the work tool 1 as an AC machine in which the power adapter 60 and the power conversion device 61 are connected is selected. Can be used. Since it is relatively common to perform continuous work for a long time in the chipping mode, it is desirable to use an AC power supply (AC machine) that can supply stable power for a long time. On the other hand, in the hammer drill mode, the work may be performed in a relatively cramped posture such as the working posture facing upward. In this case, it is desirable that the power cord can be used as a cordless machine so as not to get in the way. As described above, it is of great significance that the DC power supply and the AC power supply can be selected according to the work content for the work tool 1 (hammer drill) whose mode can be switched between the hammer drill mode and the chipping mode.

Further, in the illustrated embodiment, the power conversion device 61 can be separated from the work tool 1 by removing the power adapter 60 from the battery mounting portion 42. Since the power adapter 60 is connected to the power conversion device 61 side via the adapter cord 62 and is disconnected from the work tool 1 side, it is possible to avoid an increase in the weight corresponding to the power adapter 60 for the work tool 1. can.

Further, the prevention for absorbing the vibration generated by the operation of the drive mechanism between the tool main body tool 10 having a drive mechanism for giving the tip tool a striking operation and a rotation operation and the handle portion 40 gripped by the user. By interposing the vibration mechanism 2, the transmission of vibration to the handle portion 40 side is suppressed or cut off. Since the vibration to the battery mounting portion 42 side is suppressed, the gripability of the grip portion 41 can be improved and so-called chattering can be prevented.

Further, in the illustrated embodiment, when a plurality of types of power adapters 60, which are mainly different in output voltage, are arbitrarily selected and attached, information on the appropriate output voltage to the power adapter 60 attached to the power conversion device 61 is transmitted to the power adapter 60. It is automatically transmitted from the side to optimize the output voltage, and in this respect, the functions of the power adapter 60 and the power conversion device 61 can be further enhanced.

Further, the operating state of the tool body 10 can be switched between the case where the battery pack 50 is attached to the battery mounting portion 42 and power is supplied, and the case where the power adapter 60 is attached to the battery mounting portion 42 and power is supplied. It has become. According to this configuration, when the battery pack 50 is attached to the battery attachment portion 42, the amount of electric power (operating time) that can be supplied is restricted. Therefore, for example, the work tool 1 is operated in the energy saving mode for a long time. On the other hand, when the power adapter 60 is attached to the battery mounting portion 42 to convert commercial AC power into DC power and supply it, the power supply time is not substantially restricted. The tool 1 can be operated in the high-spec mode to quickly perform high-load work. As described above, although it is a constant DC power supply, the work can be performed by switching the operation mode of the work tool 1 depending on whether the power is supplied from the battery pack 50 or the power adapter 60. The function of the tool 1 can be further enhanced.

Various changes can be made to the embodiments described above. For example, the work tool 1 provided with the battery mounting portion 42 for mounting one battery pack 50 is illustrated. For example, for a work tool in which two battery packs 50 with 18V output are mounted and operated at 36V, a power adapter for 36V output is used. It may be configured to supply power by the power conversion device 61 by attaching the above.

Further, although the configuration in which information is transmitted / received between the power adapter 60 and the power conversion device 61 by the signal line 62e of the adapter code 62 is exemplified, it is also possible to transmit / receive information by wireless communication at a relatively short distance. good.

Although the configuration in which the power adapter 60 and the adapter cord 62 are separable and the power adapters having different output voltages can be arbitrarily selected and connected to the adapter cord 62 is illustrated, the power adapter, the adapter cord, and the power conversion device 61 are shown. As inseparable, it may be a dedicated power supply device mainly for the output voltage. In the case of such a dedicated device, transmission / reception of electronic data between the power adapter 60 and the power conversion device 61 can be omitted.

Further, as the work tool 1, a hammer drill that gives the tip tool B a striking motion in the axial direction and a rotational motion around the axis is exemplified, but a power adapter that illustrates other battery-powered work tools such as a screw tightening tool and a cutting tool. 60 and the power conversion device 61 can be applied.

1 ... Work tool 2 ... Anti-vibration mechanism B ... Tip tool 10 ... Tool body 11 ... Electric motor (brushless motor)
11a ... Drive gear unit, 11b ... Output shaft, 11c ... Cooling fan 12 ... Driven gear (first power transmission path)
13 ... Driven gear (second power transmission path)
14 ... Impact drive shaft 15 ... Eccentric shaft 16 ... Bearing 17 ... Mechanical frame 18 ... Rotary drive shafts 18a, 18b ... Bearings, 18c ... Drive side bevel gear 19 ... Driven side bevel gear 20 ... Piston 21 ... Cylinder 22 ... Impact block 24 Main body housing 25 ... Connecting rod 30 ... Tool holder 30a ... Mounting hole, 30b ... Holder piece 31 ... Strike hammer 32 ... Switching member 34 ... Intermediate lever 35 ... Operation sleeve 36 ... Mode switching dial 40 ... Handle part 41 ... Grip part 42 ... Battery mounting part 43 ... Switch lever 44 ... Switch body 45 ... Pedestal part 46 ... Controller, 46a ... Control board 47 ... Lighting equipment 50 ... Battery pack, 50a ... Rail part 51 ... Charger 60 ... Power adapter, 60a ... Legs 61 ... Power conversion device 61a ... Case, 61b ... Circuit board, 61c ... Handle, 61d ... Output display unit 62 ... Adapter cord 62a ... Coupling sleeve, 62b ... Insertion part, 62c ... Engagement groove 62d ... Power line, 62e ... Signal Wire 70 ... Power supply set case

Claims (7)

It is a work tool that can switch the operation mode between the striking mode that gives the tip tool attached to the output shaft an axial striking motion and the drilling mode that gives the tip tool a rotational motion around the axis. hand,
A battery mounting part for mounting a battery pack as a power source is provided, and a power adapter capable of supplying DC power converted from an AC power source can be attached to the battery mounting part in place of the battery pack. ,
The tip tool is provided with a drive mechanism that gives the striking operation and the rotation operation, and a handle portion that is gripped by the user, and is generated by the operation of the drive mechanism between the drive mechanism and the handle portion. An anti-vibration mechanism for absorbing vibration is interposed, and the pedestal portion is provided at the lower portion on the handle portion side, and the battery mounting portion is provided on the lower surface of the pedestal portion.
The battery pack and the power adapter are configured to be attached to the battery mounting portion by sliding forward along the axial direction of the output shaft, and an adapter cord for power supply is connected to the rear surface of the power adapter. Being done
The pedestal portion has a portion that protrudes in front of the battery mounting portion, and the lower surface of the portion that projects forward thereof is the lower surface of the battery pack attached to the battery mounting portion and the battery mounting portion in place of the battery pack . A work tool that matches both sides of the underside of the power adapter attached to . The work tool according to claim 1.
The power adapter is a work tool connected to a power conversion device that converts AC power into DC power. The work tool according to claim 2.
The power adapter can be connected to the power conversion device by selecting a plurality of types having different output voltages mainly, and the power adapter is mainly related to the output voltage between the connected power adapter and the power conversion device. A work tool configured to be able to send and receive information and supply DC power with an appropriate voltage from the power adapter. The work tool according to claim 2 or 3.
The power conversion device is a work tool provided with an output display unit. The work tool according to any one of claims 1 to 4.
A drive source is used separately from the operation mode of the output shaft depending on whether the battery pack is attached to the battery mounting portion to supply power or the power adapter is attached to the battery mounting portion to supply power. A work tool configured to switch the output rotation speed of the electric motor. The operation mode can be switched between a striking mode that gives an axial striking motion to the tip tool attached to the output shaft and a drilling mode that gives a rotational motion to the tip tool, and a battery pack is attached as a power source. It is provided with a battery mounting portion for the purpose , a drive mechanism that gives the tip tool the striking operation and the rotation operation, and a handle portion that is gripped by the user. An anti-vibration mechanism for absorbing vibration generated by the operation of the drive mechanism is interposed, and the pedestal portion is provided at the lower portion on the handle portion side, the battery mounting portion is provided on the lower surface of the pedestal portion, and the pedestal portion is provided. The portion is a power supply device used for a work tool having a portion protruding in front of the battery mounting portion, and the lower surface of the portion protruding forward coincides with the lower surface of the battery pack attached to the battery mounting portion. hand,
It is provided with a power adapter that can be attached to the battery mounting portion instead of the battery pack, and a power conversion device that converts AC power into DC power and outputs it to the power adapter.
The battery pack and the power adapter are configured to be attached to the battery mounting portion by sliding them forward along the axial direction of the output shaft.
The lower surface of the power adapter attached to the battery mounting portion coincides with the lower surface of the portion protruding forward.
A power supply device in which an adapter cord for power supply is connected to the rear surface of the power adapter. The power supply device according to claim 6.
A plurality of types of power adapters having different output voltages can be selected and connected to the power conversion device. In the power conversion device, a DC power supply having an appropriate voltage according to the connected power adapter is supplied to the power adapter. A power supply that can be output to the side.

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