WO2018180896A1

WO2018180896A1 - Electric power tool

Info

Publication number: WO2018180896A1
Application number: PCT/JP2018/011435
Authority: WO
Inventors: 高弘川上; 雅俊中浜; 孝二 ▲高▼橋
Original assignee: 株式会社マキタ
Priority date: 2017-03-31
Filing date: 2018-03-22
Publication date: 2018-10-04
Also published as: JP7098603B2; DE112018001686T5; JPWO2018180896A1; JP2020163568A; JP7027490B2

Abstract

Provided is an electric power tool in which a communication adapter can be disposed in a space-saving manner. An electric power tool (1) is provided with: a motor (6); a holding part (3) that is driven by the motor (6) and that can hold a cutting tool (43) that can cut a material to be cut; and a battery mounting part (4) to which a battery for supplying power to the motor (6) can be mounted. A communication adapter (202) that causes an external apparatus to operate in unison with the driving of the motor (6) is provided to the battery mounting part (4).

Description

Electric tool

The present invention relates to an electric tool having a motor, and more particularly to an electric tool in which a wireless interlocking unit for interlocking an external device with driving of the motor is arranged.

Conventionally, when cutting or cutting a work material such as stone or concrete, for example, an electric tool such as a grinder has been used. When such an electric tool is used, dust and cutting waste are generated, so this electric tool and an external device such as a dust collector are connected in advance with a hose, and these cutting and cutting operations are performed while operating the external device. Is going. If the hose is connected in this way, the generated dust, cutting waste, and the like can be directly sucked from the electric tool, so that the dust, cutting waste, and the like can be prevented from scattering in the work place. Therefore, the environmental performance of the workplace can be improved. That is, the workplace environment can be improved. Here, Japanese Patent Application Laid-Open No. 2012-071218 discloses a technique for operating / stopping the dust collector in conjunction with the operation / stopping of the electric tool. For this reason, it is not necessary to individually switch the operation / stop of the electric tool and the operation / stop of the dust collector. Therefore, the workplace environment can be improved without deteriorating the workability associated with the switch operation.

However, in the technique of Patent Document 1 described above, it is necessary to connect the power tool and the dust collector via a cable. For this reason, when performing cutting or cutting work (when using an electric power tool), there has been a problem that this cable is bothersome and troublesome. In order to solve this problem, it has been considered to connect the power tool and the dust collector via wireless communication. However, in this idea, it is necessary to arrange a communication adapter for each of the electric tool and the external device. Therefore, when the power tool is a small tool such as a grinder, a new problem has arisen that the communication adapter must be arranged in a space-saving manner.

The present invention is intended to solve such a problem, and an object thereof is to provide an electric tool capable of arranging a communication adapter in a space-saving manner.

The above problems are solved by the following inventions. 1st invention was equipped with the holding part which can hold | maintain the cutting tool which can be driven by a motor, and can drive the cutting tool which can be cut by a motor, and can supply the battery for supplying electric power to a motor. It is a power tool. A communication adapter for operating an external device in conjunction with driving of the motor is disposed in the battery mounting portion.

According to the first invention, even when the power tool is small, such as a grinder, the communication adapter can be arranged in a space-saving manner.

The second invention is the power tool according to the first invention, wherein the battery mounting portion is formed with an intake port capable of taking in outside air. The holding part is formed with an exhaust port through which outside air taken in from the intake port can be sent out through the air passage. The communication adapter is disposed on the opposite side of the air passage with the air inlet as a boundary, and is disposed between a terminal board for mounting the battery and a controller for controlling the motor.

According to the second aspect of the present invention, even if dust flowing in the air flowing through the air passage is included, this dust can be prevented from reaching the communication adapter. Therefore, it is possible to prevent a malfunction or the like from occurring in the communication adapter.

A third invention is an electric tool including a motor, a holding unit capable of holding a cutting tool driven by the motor and capable of cutting a work material, and a power supply unit for supplying power to the motor. Between the motor and the power supply unit, a communication adapter for operating an external device in conjunction with driving of the motor is disposed.

According to the third invention, the same effect as that of the first invention can be obtained.

The fourth invention is the electric power tool according to the third invention, wherein the power supply portion is formed with an intake port capable of taking in outside air. The holding part is formed with an exhaust port through which outside air taken in from the intake port can be sent out through the air passage. The communication adapter is arranged on the opposite side of the air passage with the intake port as a boundary.

According to the fourth invention, the same effect as that of the second invention can be obtained.

The fifth invention is the electric power tool according to the third invention, wherein the communication adapter is arranged on the opening side of the case of the controller for controlling the motor.

According to the fifth aspect of the invention, the communication adapter and the internal air passage of the electric tool (the passage of the air through which the outside air taken in from the intake port flows out from the exhaust port) are shielded by the controller. Therefore, for example, since the outside air taken in from the intake port becomes difficult to touch the communication adapter by the controller, the dustproof property for the communication adapter can be improved.

The sixth invention is the power tool according to the fifth invention, wherein the power supply portion is formed with an intake port capable of taking in outside air. The holding part is formed with an exhaust port through which outside air taken in from the intake port can be sent out through the air passage. The connector electrically connected to the communication adapter is covered with a rib so as to be shielded against the air path.

According to the sixth aspect of the invention, since the outside air taken in from the intake port is difficult to touch the communication adapter due to the ribs, it is possible to improve the dustproof property for the communication adapter.

A seventh invention includes a motor, a holding unit capable of holding a cutting tool driven by the motor and capable of cutting a work material, a motor housing that houses the motor, and a grip housing that extends from the motor housing. It is a power tool. On the side of the grip housing opposite to the motor housing, a communication adapter for operating an external device in conjunction with driving of the motor is disposed.

According to the seventh aspect, the same effect as that of the first aspect can be obtained.

The eighth invention is the electric tool according to the seventh invention, wherein an intake port capable of taking in outside air is formed on the non-motor housing side of the grip housing. The holding part is formed with an exhaust port through which outside air taken in from the intake port can be sent out through the air passage. The communication adapter is arranged on the opposite side of the air passage with the intake port as a boundary. A speed change dial for shifting the motor is disposed on the side of the grip housing opposite to the motor housing.

According to the eighth aspect, the same effect as the second aspect can be obtained.

A ninth invention is the electric tool according to any one of the first to eighth inventions, wherein the cutting tool is a disc-shaped grindstone.

According to the ninth aspect of the invention, cutting or cutting work of a work material such as stone or concrete can be performed.

The tenth invention is the power tool according to any one of the first to ninth inventions, wherein the external device is a dust collector.

According to the tenth invention, dust and cutting waste generated by using the electric tool can be directly sucked through, for example, a hose. Therefore, it can suppress that this dust, cutting waste, etc. scatter in a workplace. Therefore, the environmental performance of the workplace can be improved. That is, the workplace environment can be improved.

[Correction 28.03.2018 based on Rule 91]
1 is an overall perspective view of a grinder according to Embodiment 1. FIG. It is a side view of FIG. In FIG. 1, it is a figure which shows the state which removed one half housing. In FIG. 2, it is a figure which shows the state which removed one half housing. It is a rear view of FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 2. FIG. 7 is a sectional view taken along line VII-VII in FIG. 2. It is the schematic diagram which connected the grinder and dust collector of FIG. 1 via the hose. It is a block diagram which shows the electrical structure of the grinder and dust collector of FIG. It is a modification of FIG. 6 is a longitudinal sectional view of a grinder according to Embodiment 2. FIG. 6 is a longitudinal sectional view of a grinder according to Embodiment 3. FIG. 10 is a modification of the grinder according to the second embodiment. 10 is a modification of the grinder according to the third embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Example 1
First, Example 1 of the present invention will be described with reference to FIGS. As an example of “electric tool”, “grinder 1 capable of cutting or cutting a work material such as stone or concrete” will be described. In the following description, “up, down, front, back, left, right” indicates the directions of up, down, front, back, left, right described in the above-described drawings. This is the same in all embodiments described later.

As shown in FIGS. 1, 2, and 5, the grinder 1 mainly includes a cylindrical main body housing 2 that can accommodate a brushless motor 6 at a front portion, and a spindle 7 that is fastened to the front of the main body housing 2 with a spindle 7 facing downward. And a battery mounting portion 4 formed at the rear end of the main body housing 2. A battery pack 5 having a battery 5a (for example, DC18V) serving as a power source is mounted on the battery mounting portion 4.

The main body housing 2 is constructed by assembling a

half housing

2a, 2b that forms a pair on the left and right with a plurality of screws 8. The housing portion of the brushless motor 6 is the thickest cylindrical portion 9, and the rear portion thereof is a rectangular tube portion 10 that is thinner than the cylindrical portion 9 and accommodates a switch 46 described later. The cylindrical portion 9 and the rectangular tube portion 10 correspond to a “motor housing” and a “grip housing” described in the claims. This rectangular tube portion 10 has a length that allows the operator's four fingers (index finger to little finger) to be used, and is used as a grip to be held during use. That is, a small-diameter grip that is easier to grip rearward than the brushless motor 6 is formed.

The brushless motor 6 is an inner rotor type composed of a stator 11 and an inner rotor 12 (see FIGS. 3 to 4 and 6). The stator 11 includes a cylindrical stator core 13 formed of a plurality of laminated steel plates, a front insulator 14 and a rear insulator 15 provided on front and rear end surfaces in the axial direction of the stator core 13, and a plurality of coils 16. Yes.

The stator 11 is held coaxially with the cylindrical portion 9 by support ribs 25 protruding in the circumferential direction on the inner surfaces of the

half housings

2a and 2b of the main body housing 2, respectively. A locking rib (not shown) for locking to a notch (not shown) provided in the front insulator 14 is provided in front of the support rib 25, and provided in the rear insulator 15 behind the support rib 25. A protrusion (not shown) that fits into a positioning recess (not shown) is provided, and positioning in the front-rear direction is performed.

On the other hand, the rotor 12 is disposed around the rotation shaft 26 at the axis, the substantially cylindrical rotor core 27 formed by laminating a plurality of steel plates, and fixed to the inside of the rotor core 27 4. It consists of two plate-like permanent magnets (not shown). The permanent magnets are fixed by a through-hole adhesive and / or press-fitted so as to be positioned on four sides of a square centering on the rotation shaft 26 in the cross section of the rotor core 27.

The rear end of the rotary shaft 26 is pivotally supported by a bearing 29 held by a partition plate 28 interposed between the main body housing 2 and the gear housing 3, and the tip protrudes into the gear housing 3. A centrifugal fan 30 is attached to the rotary shaft 26 behind the partition plate 28, and the inner surface of the front end of the main body housing 2 in which the centrifugal fan 30 is accommodated is formed in a mortar shape that squeezes toward the rear. The air flow generated in the radial direction can be guided forward. The partition plate 28 is provided with a through hole (not shown) so that an air flow from the centrifugal fan 30 can be sent into the gear housing 3. The gear housing 3 corresponds to a “holding portion” described in the claims.

The rear end of the rotary shaft 26 is pivotally supported by a bearing 32 held by a receiving plate 31 protruding from the left and

right half housings

2a and 2b at the rear end of the cylindrical portion 9. Further, in the rotor 12, a front stopper 33 is provided between the rotor core 27 and the centrifugal fan 30. The front stopper 33 is, for example, a disc made of brass and having the same outer diameter as the rotor core 27, and is fixed to the rotary shaft 26 coaxially with the rotor core 27.

On the other hand, a rear stopper 34 is provided between the rotor core 27 and the rear bearing 32. The stopper 34 is, for example, a disc made of brass and having an outer diameter smaller than that of the rotor core 27, and is fixed to the rotary shaft 26 coaxially with the rotor core 27. However, the outer diameter of the rear stopper 34 is larger than the inner circle surrounded by the four permanent magnets, and the rear stopper 34 is positioned behind each permanent magnet.

The gear housing 3 is fixed by screwing four screws 35 penetrated from the front at the four corners into a screwing portion 36 provided on the outer periphery of the front end of the main body housing 2 via the partition plate 28. A bevel gear 37 is fixed to the front end of the rotating shaft 26 protruding into the gear housing 3 and meshes with a bevel gear 38 fixed to the upper end of the spindle 7. Reference numeral 39 denotes an exhaust port formed on the front surface of the gear housing 3. Reference numeral 40 denotes a shaft lock that can lock the rotation of the spindle 7 via the bevel gear 38 by a pushing operation.

The spindle 7 is supported by an upper and lower bearing 42 held by the gear housing 3 and a bearing box 41 assembled to the lower portion of the gear housing 3 and protrudes downward. A cutting tool 43 such as a disc-shaped grindstone is provided at the lower end of the spindle 7. Can be installed. A wheel cover 45 is attached to the outer periphery of the bearing box 41 to cover the rear half of the cutting tool 43 with a belt-like clamp 44.

In the

main body housing

2, 46 is a switch that is turned on when the button 47 is pressed, and the button 47 on the upper side in the rectangular tube portion 10 by a holding rib 48 protruding from the inner surfaces of the

half housings

2 a and 2 b. Is held in a posture facing forward. Thereby, a space 49 for passing a power line (not shown) and a signal line (not shown) is formed below the switch 46. In addition, a partition wall 50 that partitions between the brushless motor 6 and the switch 46 projects from the

half housings

2a and 2b in front of the holding rib 48, and between the partition wall 50 and the switch 46, A change lever 51 is provided as a lever member that forms a pressing mechanism.

As shown in FIG. 4, the change lever 51 is rotatably supported by being penetrated by pins 53 whose both ends are supported by support bosses (not shown) protruding from the inner surfaces of the

half housings

2a and 2b. Therefore, a cam portion 54 is formed on the lower side of the pin 53 so as to be located in front of the button 47 of the switch 46 and bulge rearward, and on the upper side of the pin 53, an arm portion 55 protruding upward is formed. Has been. Above the change lever 51, a slide plate 57 is provided in the main body housing 2 as a slide member that can slide back and forth along an inner guide groove 56 in the front and rear direction that is recessed in the inner surface of the main body housing 2. The arm portion 55 of the change lever 51 is inserted into a connecting hole (not shown) provided at the rear end of the plate 57.

On the other hand, an outer guide groove 59 is formed in the front / rear direction on the upper outer surface of the main body housing 2, and a switch knob 60 as an operation member is accommodated in the outer guide groove 59 so as to be movable back and forth. An L-shaped locking piece 61 protrudes downward from the lower surface of the switch knob 60, passes through a slit 62 in the front-rear direction formed in the main body housing 2, and protrudes into the main body housing 2. Is locked in a locking hole 63 provided at the front end. Therefore, when the switch knob 60 is slid forward in the outer guide groove 59, the slide plate 57 is also slid forward and the rear end arm portion 55 is moved forward, so that the change lever 51 moves the pin 53. 2, the button 47 is pushed by swinging the cam portion 54 backward.

This ON state is maintained by a projecting piece (not shown) projecting downward at the front end of the switch knob 60 engaging with a projecting part (not shown) projecting from the bottom front side of the outer guide groove 59. . On the contrary, when the switch knob 60 is slid backward, the slide plate 57 slides backward, the change lever 51 is rotated counterclockwise via the arm portion 55, and the cam portion 54 is separated from the button 47. However, a torsion spring 64 that is engaged with the change lever 51 and the partition wall 50 is externally mounted on the pin 53 to urge the change lever 51 in the clockwise direction (switch OFF side).

In addition, an adapter mounting part 200 is provided inside the battery mounting part 4. The adapter mounting unit 200 is configured so that the communication adapter 202 can be attached and detached. The adapter mounting unit 200 includes an adapter storage unit 204 that can store the communication adapter 202. The adapter housing portion 204 is located in the internal space of the battery mounting portion 4.

The adapter mounting unit 200 includes a cap 208 that covers an adapter insertion port 206 that is opened to insert and remove the communication adapter 202 into and from the adapter housing unit 204. The adapter insertion port 206 is formed on the right surface of the battery mounting portion 4, and the communication adapter 202 can be inserted into and removed from the adapter insertion port 206 in the left-right direction.

The adapter mounting unit 200 includes a cap 208 that covers the adapter insertion port 206. The cap 208 is configured to be openable and closable with respect to the adapter insertion opening 206 in the left-right direction. The cap 208 is provided to restrict the entry of dust, water, and the like from the adapter insertion opening 206 into the adapter housing portion 204. The communication adapter 202 is attached / detached with the cap 208 opened. The cap 208 can be completely closed in a state where the communication adapter 202 is completely inserted into the adapter housing portion 204. By closing the cap 208 and covering the adapter insertion opening 206, intrusion of dust, water, or the like into the adapter housing portion 204 is suppressed.

The battery pack 5 has a coupling portion 66 provided with a terminal (not shown) on an upper part of an outer case 65 that accommodates a plurality of cells, and a pair of rail portions 67 project from both sides of the coupling portion 66. . The battery mounting portion 4 has an opening that accepts the coupling portion 66 of the battery pack 5 from above, and a pair of left and right guide rails 68 that fit into the rail portion 67 of the coupling portion 66 protrude from both sides of the opening. Has been. Further, a terminal block 69 provided with

terminal plates

70 a and 70 b corresponding to the terminals of the coupling portion 66 is provided between the guide rails 68 upward.

Accordingly, when the battery pack 5 is fitted in the guide rail 68 from the upper side of the battery mounting portion 4 and is slid from the upper side in a vertical posture with the connecting portion 66 in front, the terminals and terminals of the connecting portion 66 are connected. The

terminal boards

70a and 70b of the base 69 are electrically connected. Reference numeral 71 denotes a locking claw provided on the battery pack 5, which engages with a recess 72 provided on the battery mounting portion 4 in the mounted state to prevent the battery pack 5 from coming off. The battery pack 5 can be removed by retracting the locking claw 71 into the outer case 65 by operating the release button 73.

In the battery mounting portion 4, a controller 74 is accommodated in front of the terminal block 69. The controller 74 is a circuit board 75 on which six FETs (not shown) corresponding to the coils 16 of the brushless motor 6, a capacitor 76, a microcomputer (not shown), an LED (not shown), and the like are mounted. And is held by a holding portion 79 provided vertically on the inner surfaces of the

half housings

2a and 2b. Here, the lower holding portion 79 is positioned forward of the upper side. Thus, the controller 74 is supported in an inclined posture in which the lower end is positioned forward of the upper end with respect to the axis of the main body housing 2.

Due to this inclination, even if the capacitor 76 is provided at the end of the circuit board 75, it can be positioned on the center side in the main body housing 2, and it is not necessary to provide a protruding shape on the main body housing 2 by the capacitor 76. Moreover, since the space | interval of the aluminum case 78 and the terminal block 69 becomes wide according to the inclination of the controller 74, possibility that both will conduct | electrically_connect becomes very small. The capacitor 76 may be provided with a longer electrode terminal and away from the circuit board 75.

The controller 74 includes a microcomputer including a CPU 74a and a memory 74b (see FIG. 9). The memory 74b includes a semiconductor memory such as a RAM, a ROM, and a flash memory. Various programs and data for realizing various functions of the grinder 1 are stored in the memory 74b. Various functions of the grinder 1 are realized by the CPU 74a executing various programs stored in the memory 74b. The various functions realized by the controller 74 are not limited to software processing, and some or all of the functions may be realized using hardware by combining a logic circuit, an analog circuit, or the like.

Further, the battery mounting unit 4 is provided with a connector 210 connected to the controller 74. The connector 210 is a connection circuit for electrically connecting the controller 74 and a communication adapter 202 described later. Therefore, when the communication adapter 202 is attached to the adapter attachment part 200 of the battery attachment part 4, the connector 210 and the communication adapter 202 are electrically connected. The connector 210 is formed on the opposite side (front side) of the air passage (the passage of the air through which the outside air taken in from the intake port 87 flows out from the exhaust port) with an intake port 87 described later as a boundary (see FIG. 3). ). That is, the communication adapter 202 is disposed on the opposite side of the air passage with the air inlet 87 as a boundary, and between the

terminal plates

70a and 70b for mounting the battery 5a and the controller 74 for controlling the brushless motor 6. Has been.

Here, the communication adapter 202 will be described in detail. The communication adapter 202 includes a control circuit 212, a connection terminal portion 214, an antenna 216, a power supply circuit 218, an adapter switch 220, and an LED 222 (see FIG. 9). The connection terminal portion 214 is a member for electrically connecting the communication adapter 202 and the controller 74, and specifically has a plurality of contacts 214a made of a conductor (see FIG. 7). When the connection terminal portion 214 of the communication adapter 202 is connected to the connector 210 by attaching the communication adapter 202 to the adapter attachment portion 200, a plurality of contacts 214a included in the connection terminal portion 214 are respectively connected to corresponding terminals ( (Not shown).

When the operating information is output from the controller 74, the operating information is input to the connection terminal unit 214 of the communication adapter 202 via the connector 210 and input to the control circuit 212 via the connection terminal unit 214. The Further, when the operation power supply of the communication adapter 202 is output from the controller 74 via the connector 210, the operation power is input to the power supply circuit 218 via the connection terminal portion 214 in the communication adapter 202. .

When power for operation is input from the main body housing 2 via the connection terminal portion 214, the power supply circuit 218 is configured to operate each unit in the communication adapter 202 including the control circuit 212 based on the power for operation. Power supply power is generated and supplied to each unit. Each part in the communication adapter 202 operates by this internal power supply power.

The control circuit 212 of the communication adapter 202 includes a microcomputer including a CPU 212a and a memory 212b. The memory 212b includes a semiconductor memory such as a RAM, a ROM, and a flash memory. Various programs and data for realizing various functions of the communication adapter 202 are stored in the memory 212b. Various functions of the communication adapter 202 are realized by the CPU 212a executing various programs stored in the memory 212b. However, the various functions implemented by the control circuit 212 are not limited to software processing, and some or all of the functions may be implemented using hardware by combining a logic circuit, an analog circuit, or the like.

When the operation information is input from the main body housing 2 via the connection terminal portion 214, the control circuit 212 causes the antenna 216 to wirelessly transmit the operation information including at least the above-described interlocking command. The operating information is information indicating that the switch 46 is turned on and the brushless motor 6 of the grinder 1 is operating. The interlocking command is a command for operating the dust collector 300 in an interlocking manner. When the interlocking command wirelessly transmitted from the communication adapter 202 of the grinder 1 is received by the communication adapter 320 of the dust collector 300 and transmitted to the dust collector 300, the dust collector 300 is operated in conjunction.

When the switch 46 of the grinder 1 is turned off and the brushless motor 6 is stopped, an interlock stop command is wirelessly transmitted from the communication adapter 202 of the grinder 1, and the interlock operation of the dust collector 300 is thereby stopped.

The dust collector 300 can suck the dust and cutting waste discharged by the work by the grinder 1 through the hose 302. Therefore, the grinder 1 and the dust collector 300 are connected via the hose 302 (see FIG. 8). Moreover, the dust collector 300 can attach or detach the communication adapter 320.

The dust collector 300 includes a controller 310, a motor 312, a power supply circuit 314, a connector 316, and a battery pack 318 having a battery 318a (for example, DC 18V). The battery pack 318 is configured in the same manner as the battery pack 5 of the grinder 1 and is detachable from the dust collector 300.

The controller 310 includes a microcomputer having a CPU, a memory, and the like, like the controller 74 of the grinder 1, and realizes various functions in the dust collector 300. When an operation switch (not shown) is turned on by the user of the dust collector 300, the controller 310 drives the motor 312 so that dust and cutting waste can be sucked. The connector 316 is a connection circuit for electrically connecting the dust collector 300 and the communication adapter 320, and has the same configuration as the connector 316 of the grinder 1.

The communication adapter 320 that can be attached to and detached from the dust collector 300 has basically the same configuration as the communication adapter 202 that can be attached to and detached from the grinder 1 and has the same functions. That is, the communication adapter 320 that can be attached to and detached from the dust collector 300 includes a control circuit 322, a connection terminal portion 324, an antenna 326, an adapter switch 330, and an LED 332, like the communication adapter 202 that can be attached to and detached from the grinder 1.

When receiving the interlock command from the communication adapter 202 of the grinder 1, the communication adapter 320 of the dust collector 300 outputs the interlock command to the dust collector 300 via the connection terminal unit 324. When the interlock command is input from the communication adapter 320 via the connector 316, the controller 310 of the dust collector 300 drives the motor 312. When the interlock stop command is input from the communication adapter 320 via the connector 316, the motor 312 is driven. Stop. Thereby, the interlocking operation of the grinder 1 and the dust collector 300 is realized.

In addition, when the interlock stop command is input from the communication adapter 320, the timing at which the motor 312 is stopped may be appropriately determined. For example, it may be stopped immediately after an interlock stop command is input.

Also, for example, after inputting the interlock stop command, it may be stopped after waiting for a specified time. That is, even after the brushless motor 6 of the grinder 1 is stopped, the motor 312 of the dust collector 300 may be continuously driven for a specified time. The same effect can be realized by the following configuration. That is, in the grinder 1, when the switch 46 is turned off, the brushless motor 6 is stopped, but the interlocking stop command is not transmitted immediately, and the interlocking stop command is transmitted after a lapse of a specified time from the stop of the brushless motor 6. May be.

Further, in the grinder 1, when the switch 46 is turned on, the brushless motor 6 of the grinder 1 is not driven immediately although the interlock command is transmitted to the dust collector 300, and the brushless motor 6 is driven after a certain time has elapsed after the interlock command is transmitted. You may make it make it. That is, the motor 312 of the dust collector 300 may be driven first, and then the brushless motor 6 of the grinder 1 may be driven.

The dust collector 300 has a configuration in which the communication adapter 320 can be attached and detached, but may have a configuration in which the communication adapter 320 or an equivalent circuit module is built in in advance.

In order to link the grinder 1 and the dust collector 300, the communication adapter 202 of the grinder 1 and the communication adapter 320 of the dust collector 300 are set in a state in which one-to-one wireless communication is possible. 320 need to be paired.

In order to perform this pairing, the adapter switch 220 is provided in the communication adapter 202 of the grinder 1, and the adapter switch 330 is also provided in the communication adapter 320 of the dust collector 300. Specifically, the pairing is performed as follows. First, when the user turns on the adapter switch 330 of the communication adapter 320 of the dust collector 300, the communication adapter 320 is set in a pairing standby state. Thereafter, when the user turns on the adapter switch 220 of the communication adapter 202 of the grinder 1, predetermined data communication for pairing is performed between the two

communication adapters

202, 320. As a result, both

communication adapters

202, 320 pairing is completed.

When the pairing is completed, one-to-one data communication is possible between the two

communication adapters

202 and 320, and an interlock command is wirelessly transmitted from the communication adapter 202 of the grinder 1 and received by the communication adapter 320 of the dust collector 300. Then, the dust collector 300 is operated in an interlocked manner based on the interlock command. Note that the functions of the

communication adapters

202 and 320 are not limited to pairing and transmission / reception of interlocking commands, and other various types of information can also be transmitted / received.

The communication adapter 202 of the grinder 1 is configured to turn off, turn on, or blink the LED 222 according to the operating state. In addition, the color of light emitted when the LED 222 is turned on or blinking can be switched to one of a plurality of colors. In addition, the time interval and blinking pattern for blinking the LED 222 can be switched to any of a plurality of types.

In the first embodiment, for example, when the communication adapter 202 is activated by mounting the communication adapter 202 on the adapter mounting unit 200 of the grinder 1 and supplying power to the communication adapter 202, the LED 222 is lit in a specific color. . Also, for example, when the adapter switch 220 is turned on during startup and predetermined data communication for pairing is started, the LED 222 blinks while the data communication is being performed, that is, during pairing. For example, when the pairing is completed, the LED 222 blinks at a faster speed than the blinking speed during the pairing. The user can grasp the operation state of the communication adapter 202 by visually recognizing the light emission state of the LED 222. The same applies to the communication adapter 320 of the dust collector 300, and the LED 332 is turned off, lit, or blinked in accordance with the operating state.

The lower portion of the battery mounting portion 4 is a bulging portion 80 that swells downward from the rectangular tube portion 10, and a space 81 is formed between the controller 74 and the bulging portion 80 so as to communicate the front and rear of the controller 74. is doing. A plurality of LEDs 222 are mounted on the upper end side of the circuit board 75 and face a window 83 provided in an inclined portion 82 formed so as to extend in the same direction as the inclination of the controller 74 above the battery mounting portion 4. . In this window 83, a shielding plate (not shown) for partitioning the LEDs 222 and a display unit 86 for covering the surface of the shielding plate are provided, and a display unit 86 for remaining battery capacity that can be visually recognized from the outside is formed. ing. Here, since the display unit 86 extends in the vertical direction and the front-rear direction, the visibility of the display unit 86 is improved (FIG. 4).

On the other hand, air inlets 87 are formed on the left and right side surfaces of the battery mounting portion 4 between the terminal block 69 and the controller 74. The intake port 87 is formed in a triangular shape that becomes longer forward as it goes downward, in accordance with the shape of the space formed between the terminal block 69 and the inclined controller 74. Reference numeral 96 denotes an air inlet cover that is attached to the side surface of the battery mounting portion 4 at the position of the air inlet 87.

A metal mesh 98 is provided in a triangular rubber frame 97 that is slightly larger than the air inlet 87, and a locking pin (not shown) protruding from each apex portion on the back surface of the frame 97 is attached to the battery. By inserting into a locking hole (not shown) provided on the side surface of the portion 4, the air inlet 87 is attached with a wire mesh 98. A flange-shaped widened portion (not shown) is formed at the distal end portion of the locking pin, so that resistance in the pulling direction is generated when the locking pin is inserted into the locking hole. With this air inlet cover 96, it is possible to prevent intrusion of foreign matter while allowing ventilation to the air inlet 87.

In addition, 101 which appears on the side surface and the lower surface of the main body housing 2 is a non-slip recess, and is formed long in the front-rear direction with a predetermined interval in the circumferential direction. A non-slip convex portion 102 is formed. The anti-slip concave portion 101 and the convex portion 102 are formed symmetrically so as to improve the catching of a finger holding the main body housing 2.

In addition, a guide wall 88 is formed between the controller 74 and the air intake 87 on the inner surfaces of the

half housings

2a and 2b. The guide wall 88 protrudes in parallel with the lower surface of the case 78 of the controller 74, but the protruding ends do not contact each other, and a gap is provided between the guide walls 88. Therefore, the outside air sucked from the left and right intake ports 87 is guided to the center of the battery mounting portion 4 by the guide wall 88 and flows downward along the lower surface of the case 78 from the gap between the guide walls 88. .

Thus, since the

terminal plates

70a and 70b are disposed on the left and right sides and the ventilation portion to the case 78 is disposed in the center, both are less likely to be short-circuited. Further, a plurality of left and right ribs 103 are formed at equal intervals in the vertical direction on the back surface of each guide wall 88 so as to rectify and guide the outside air sucked from each intake port 87 to the center. . A lattice-shaped groove 104 is formed at the center of the back surface of the case 78, and the groove 104 makes the back surface of the case 78 uneven to increase the contact area with the outside air.

Therefore, the signal line and the power line of the brushless motor 6 are wired to the controller 74 through the space 49 below the switch 46, and the power line (not shown) of the terminal block 69 is wired to the controller 74 through the space 81 below the controller 74. The For this reason, the signal lines and the power supply lines are easily assembled and wired. Since the switch 46 is in a forward-facing posture with the button 47 on the front side, the lead wire (not shown) connected to the rear end of the switch 46 does not pass through the space 49 and is directly behind the controller 74 and the terminal. It is wired to the stand 69 with the shortest distance. As described above, since the power supply line and the lead wire extend from the rear side of the switch 46, there is no need to bypass the switch 46, and the space 49 can be made small, the rectangular tube portion 10 can be formed thin, and can be easily grasped. . Further, since it is not necessary to bend the lead wire, wiring can be easily performed. A speed change dial 106 is assembled on the upper surface of the battery mounting portion 4. This description corresponds to “the shift dial 106 for shifting the motor is disposed on the side of the grip housing opposite to the motor housing” described in the claims. Thereby, for example, the rotational speed of the brushless motor 6 can be changed.

In the grinder 1 configured as described above, when the switch tube 60 is slid forward by gripping the square tube portion 10, the slide plate 57 moves forward as described above to rotate the change lever 51 and switch the switch 46. Turn it on. Therefore, the brushless motor 6 is driven by the power supply of the battery pack 5. That is, the microcomputer of the controller 74 obtains the rotation detection signal indicating the position of the permanent magnet of the rotor 12 output from the rotation detection element of the sensor circuit board (not shown), acquires the rotation state of the rotor 12, and acquires the acquired rotation. The rotor 12 is rotated by controlling the ON / OFF of each switching element according to the state, and causing current to flow sequentially to each coil 16 of the stator 11. Therefore, since the rotating shaft 26 rotates and the spindle 7 is rotated via the bevel gears 37 and 38, the cutting tool 43 can be used for cutting or cutting stone or concrete.

In this case, since the front stopper 33 and the rear stopper 34 are provided before and after the rotating rotor 12, the movement of each permanent magnet in the front-rear direction is restricted, and the rotor core 27 is prevented from coming out. Therefore, there is no possibility that the permanent magnet will fall off, and the highly reliable brushless motor 6 can be used. Further, while the grinder 1 is in use, the display unit 86 notifies the remaining battery capacity by turning on the LED, but the visibility of the display unit 86 is improved by the tilted posture of the controller 74. Even when the controller 74 is inclined as described above, the battery pack 5 is mounted in a posture orthogonal to the main body housing 2, so that the grinder 1 can be placed vertically (self-standing) with the battery pack 5 down. . Furthermore, the entire length of the grinder 1 does not extend.

On the other hand, when the centrifugal fan 30 rotates along with the rotation of the rotating shaft 26, outside air is sucked from the rear intake port 87 and passes between the ribs 103, and the central portion of the case 78 of the controller 74 is guided by the guide wall 88. To the space 81, the controller 74 is turned from below to advance in the main body housing 2. Then, it passes between the stator 11 and the rotor 12 of the brushless motor 6 through the space 49, reaches the gear housing 3 from the main body housing 2, and is discharged from the exhaust port 39 to the outside.

The controller 74 and the terminal block 69 are cooled by this air flow, and the brushless motor 6 is also cooled. Particularly, in the controller 74, since the outside air is once guided to the central portion by the guide wall 88 and then flows to the outer peripheral side along the lower surface of the case 78, the contact area with the air is increased and the controller 74 is efficiently cooled. When the switch knob 60 is slid rearward, the slide plate 57 moves backward to rotate the change lever 51 and turn off the switch 46, so that the driving of the brushless motor 6 is stopped.

Thus, according to the grinder 1 of the said form, the controller 74 is arrange | positioned adjacent to the terminal stand 69 provided in the battery mounting part 4 in the main body housing 2, and electrically connected with the battery pack 5, By providing the air inlet 87 between the terminal block 69, the terminal block 69 can be suitably cooled in addition to the controller 74. In particular, here, the brushless motor 6, the controller 74, and the terminal block 69 are arranged on a straight line, the controller 74 is inclined with respect to the straight line, and the end of the inclined controller 74 near the terminal block 69 is Since the display part 86 of the remaining capacity of the battery is provided and the display part 86 can be visually recognized through the window 83 provided in the battery mounting part 4, the visibility of the display part 86 is improved. Further, by providing a guide wall 88 for guiding the outside air sucked from the intake port 87 to the central side of the controller 74 between the controller 74 and the intake port 87 on the inner surface of the main body housing 2, the controller 74 is further cooled. Done effectively.

On the other hand, according to the grinder 1 of the said form, when the switch 46 was accommodated in the forward attitude | position which the button 47 becomes a front, it becomes easy to wire the switch 46 and the diameter reduction of the main body housing 2 can also be achieved. . In particular, here, a slide plate 57 that slides in the front-rear direction in conjunction with the switch knob 60 is provided in the main body housing 2, and the switch is moved between the slide plate 57 and the switch 46 according to the advance of the slide plate 57. 46, by pressing the button 47 and moving away from the button 47 in accordance with the backward movement of the slide plate 57, the switch knob 60 is operated in the forward direction (the forward movement). It is not necessary to change ON) and reverse), and operability can be maintained. Further, the pressing mechanism is rotatably supported in the main body housing 2, the upper end arm portion 55 is engaged with the slide plate 57, the lower end cam portion 54 is positioned in front of the button 47, and the slide plate 57 Since the cam portion 54 is formed by the change lever 51 that presses the button 47 by rotating in accordance with the forward movement, the pressing mechanism can be easily formed.

In the above embodiment, only the controller is inclined, but the terminal block may be inclined in the same manner, and the battery pack may be inclined with respect to the axis of the main body housing. In this case, the intake port formed between the controller and the terminal block that are parallel to each other is formed to have the same length in the front-rear direction. In addition, the air inlet is not limited to the left and right sides of the battery mounting portion, and can be provided only on one side. In this case, the guide wall is only on one side. However, guide walls and ribs can be omitted. Furthermore, the switch knob may be provided on the side surface instead of the upper surface of the main body housing. In this case, the change lever is supported so that it can rotate sideways.

In addition, the invention relating to cooling of the controller and the terminal block is not limited to the grinder, but can be applied to other electric tools as long as the battery is used as a power source and the controller is provided. is there. On the other hand, the invention relating to the direction of the switch is not limited to a grinder, and may be an AC tool that does not use a battery as a power source as long as it has a switch that can be turned ON / OFF by a sliding operation of an operation member. The present invention can also be applied to other power tools such as joint cutters, nibbles, and straight shears. The dust collector 300 may also be a commercial power source with an AC 100V outlet that does not use the battery 318a of the battery pack 318 as a power source.

The grinder 1 according to the first embodiment of the present invention is configured as described above. According to this configuration, the battery mounting unit 4 is provided with the communication adapter 202 for operating the dust collector 300 in conjunction with the driving of the brushless motor 6. Thus, when the communication adapter 202 is arrange | positioned at the battery mounting part 4, even when a power tool is small things, such as a grinder, the communication adapter 202 can be arrange | positioned in space saving. Moreover, if it arrange | positions in this way, it will not interfere with the grip location (square tube part 10) of the grinder 1. FIG. Therefore, the operability of the grinder 1 is not affected.

Further, according to this configuration, the communication adapter 202 is formed on the opposite side (front side) of the air passage (the passage through which the air taken out from the intake port 87 flows out from the exhaust port) with the intake port 87 as a boundary. . Therefore, even if dust or the like is included in the air flowing through the air path, this dust can be prevented from reaching the communication adapter 202. Therefore, it is possible to prevent a malfunction or the like from occurring in the communication adapter 202.

Further, according to this configuration, the cutting tool 43 is a disc-shaped grindstone or the like. For this reason, it is possible to cut or cut a work material such as stone or concrete.

Further, according to this configuration, the external device is the dust collector 300. Therefore, dust and cutting waste generated by using the grinder 1 can be directly sucked through the hose 302. Therefore, it can suppress that this dust, cutting waste, etc. scatter in a workplace. Therefore, the environmental performance of the workplace can be improved. That is, the workplace environment can be improved.

(Example 2)
Next, a second embodiment of the present invention will be described. The grinder 101 of the second embodiment has a configuration in which the arrangement of the controller 74 and the adapter mounting portion 200 is changed as compared with the grinder 1 of the first embodiment already described. In the following description, members having the same or equivalent configuration as those of the first embodiment are denoted by the same reference numerals in the drawings, and redundant description is omitted. The same applies to Example 3 described later.

As shown in FIG. 11, the grinder 101 is mainly composed of a cylindrical main body housing 2 capable of accommodating the brushless motor 6 at a front portion, and a gear fastened to the front of the main body housing 2 and projecting a spindle 7 downward. The housing 3 is composed of a battery mounting portion 4 formed at the rear end of the main body housing 2. A battery pack 5 having a battery 5a (for example, DC18V) serving as a power source is mounted on the battery mounting portion 4.

As is apparent from FIG. 11, the controller 74 is housed near the battery mounting portion 4 in the main body housing 2, the opening 78 a of the case 78 is directed downward, and approximately in the center of the main body housing 2 in the height direction. ing. The accommodated controller 74 is oriented such that an axis L1 orthogonal to the surface forming the opening 78a of the case 78 is orthogonal to the axis L2 of the main body housing 2.

In such a direction, a surface (surface on the groove 104 side) that requires cooling in the case 78 of the controller 74 is an air passage (a passage through which air that sends outside air taken in from the intake port 87 through the exhaust port 39 flows. ), The cooling performance for the controller 74 can be enhanced (the controller 74 can be sufficiently cooled). Of the front and rear holding portions 79 that hold the controller 74, the rear holding portion 79 is formed in a substantially L shape. Thereby, since the outside air taken in from the intake port 87 is guided to the surface of the case 74 of the controller 74 on the groove 104 side, the cooling performance for the controller 74 can be further improved (the controller 74 can be sufficiently cooled).

Further, as apparent from FIG. 11, the adapter mounting portion 200 to which the communication adapter 202 is mounted is also placed vertically near the battery mounting portion 4 in the main body housing 2 and on the opening 78 a side of the case 78 of the controller 74. So that it is housed. When accommodated in this way, the communication adapter 202 and the air path are shielded by the controller 74. Therefore, since the outside air taken in from the intake port 87 is difficult to touch the communication adapter 202, the dustproof property for the communication adapter 202 can be improved.

Further, the adapter mounting portion 200 is configured to be shielded from the intake port 87 by the rear holding portion 79. Therefore, since the outside air taken in from the intake port 87 is difficult to touch the communication adapter 202, the dustproof property for the communication adapter 202 can be improved. The outer periphery of the connector 210 to which the communication adapter 202 is electrically connected is covered with a rib 224. Therefore, since the outside air taken in from the intake port 87 is difficult to touch the communication adapter 202, the dustproof property for the communication adapter 202 can be improved. The grinder 1 is configured in this way.

The grinder 101 according to the second embodiment of the present invention is configured as described above. According to this configuration, the same effect as that of the grinder 1 of the first embodiment can be obtained. The adapter mounting portion 200 to which the communication adapter 202 is mounted is housed so as to be vertically placed near the battery mounting portion 4 in the main body housing 2 and on the opening 78a side of the case 78 of the controller 74. When accommodated in this way, the communication adapter 202 and the air path are shielded by the controller 74. Therefore, since the outside air taken in from the intake port 87 is difficult to touch the communication adapter 202 by the controller 74, the dustproof property for the communication adapter 202 can be improved.

Further, according to this configuration, the outer periphery of the connector 210 to which the communication adapter 202 is electrically connected is covered with the rib 224. Therefore, since the outside air taken in from the intake port 87 is difficult to touch the communication adapter 202 by the ribs 224, the dustproof property for the communication adapter 202 can be improved.

(Example 3)
Next, a third embodiment of the present invention will be described. The grinder 201 of the third embodiment is a form in which the arrangement of the adapter mounting portion 200 is changed as compared with the grinder 1 of the first embodiment already described.

As shown in FIG. 12, the grinder 201 is mainly composed of a cylindrical main body housing 2 capable of accommodating the brushless motor 6 at the front, and a gear fastened to the front of the main body housing 2 so that the spindle 7 protrudes downward. The housing 3 is composed of a battery mounting portion 4 formed at the rear end of the main body housing 2. A battery pack 5 having a battery 5a (for example, DC18V) serving as a power source is mounted on the battery mounting portion 4.

As apparent from FIG. 12, the adapter mounting portion 200 to which the communication adapter 202 is mounted is inclined toward the battery mounting portion 4 in the main body housing 2 and toward the opening 78a of the case 78 of the controller 74 (on the controller 74). (Inclined state that is substantially parallel). The outer periphery of the connector 210 to which the communication adapter 202 is electrically connected is covered with a rib 224. Therefore, since the outside air taken in from the intake port 87 is difficult to touch the communication adapter 202, the dustproof property for the communication adapter 202 can be improved. The grinder 201 is configured in this way.

The grinder 201 according to the third embodiment of the present invention is configured as described above. According to this configuration, the same effect as that of the grinder 1 of the first embodiment can be obtained. Further, the adapter mounting portion 200 to which the communication adapter 202 is mounted is inclined toward the battery mounting portion 4 in the main body housing 2 and toward the opening 78a of the case 78 of the controller 74 (substantially parallel to the controller 74). (Inclined state). The outer periphery of the connector 210 to which the communication adapter 202 is electrically connected is covered with a rib 224. Therefore, since the outside air taken in from the intake port 87 is difficult to touch the communication adapter 202, the dustproof property for the communication adapter 202 can be improved.

The above-mentioned contents are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.

In each embodiment, the adapter insertion port 206 has been described as being formed on the right surface of the battery mounting portion 4. However, the present invention is not limited to this, and the adapter insertion opening 206 may be formed on the left, upper, or lower surface of the battery mounting portion 4.

Further, in each embodiment, the form in which the external device is the dust collector 300 has been described. However, the present invention is not limited to this, and the external device may be various devices capable of jetting water, emitting light, and emitting sound.

Further, in each embodiment, the mode in which the motor is the brushless motor 6 has been described. However, the present invention is not limited to this, and the motor may be various motors.

In each embodiment, the communication adapter 202 of the grinder 1 has been described as being supplied with power from the battery pack 5. However, the present invention is not limited to this, and the communication adapter 202 may have a form in which power is supplied from a built-in battery. The same applies to the communication adapter 320 of the dust collector 300.

Further, the communication adapter 202 may be disposed between the brushless motor 6 and the power supply unit (for example, the battery mounting unit 4). Even in that case, the communication adapter 202 is disposed on the opposite side (front side) of the air passage (the passage of the air through which the outside air taken in from the intake port 87 flows out from the exhaust port) with the intake port 87 as a boundary. Therefore, even if dust or the like is included in the air flowing through the air path, this dust can be prevented from reaching the communication adapter 202. Therefore, it is possible to prevent a malfunction or the like from occurring in the communication adapter 202.

Further, the communication adapter 202 may be arranged on the side opposite to the cylindrical portion 9 of the rectangular tube portion 10. Even in that case, the communication adapter 202 is disposed on the opposite side (front side) of the air passage (the passage of the air through which the outside air taken in from the intake port 87 flows out from the exhaust port) with the intake port 87 as a boundary. Therefore, even if dust or the like is included in the air flowing through the air path, this dust can be prevented from reaching the communication adapter 202. Therefore, it is possible to prevent a malfunction or the like from occurring in the communication adapter 202.

Moreover, in each Example, the form with one dust collector 300 was demonstrated (refer FIG. 8). However, the present invention is not limited to this, and the number of dust collectors 300 may be two (see FIG. 10). In this case, as shown in FIG. 10, for example, a dust collection BOX 340 for receiving dust 344 generated by cutting or cutting of the concrete 342 by the grinder 1 is provided, and the dust collection BOX 340 and the two dust collectors 300 are respectively connected. Connect via hose 302. Then, the two dust collectors 300 operate in conjunction with the operation of the grinder 1 as in the case of the single dust collector 300. Thus, when the number of dust collectors 300 is two, the dust collecting power of the dust 344 can be increased.

In each embodiment, the speed change dial 106 has been described. However, the present invention is not limited to this, and a switching dial may be used. In that case, the control mode for controlling the brushless motor 6 can be switched.

In the second embodiment, the controller 74 may be accommodated above the approximate center of the main body housing 2 in the height direction. In that case, as shown by the grinder 301 in FIG. 13, the adapter mounting portion 200 to which the communication adapter 202 is mounted may be accommodated horizontally on the opening 78 a side of the case 78 of the controller 74. . Since it may be accommodated in this way, the degree of freedom of arrangement of the controller 74 and the adapter mounting part 200 in the main body housing 2 can be proposed.

Further, in the third embodiment, the adapter mounting portion 200 to which the communication adapter 202 is mounted may be accommodated so as to be placed horizontally near the switch 46 in the main body housing 2. In that case, the grinder 401 is as shown in FIG. Since it may be accommodated in this way, the degree of freedom of arrangement of the adapter mounting part 200 in the main body housing 2 can be proposed.

In each embodiment, the communication adapter 202 may be disposed outside the battery mounting part 4 and the main body housing 2 (outside the grinder 1) (either an external type).

In the second embodiment, the connector 210 may not be covered with the rib 224. The same applies to the third embodiment.

Claims

A motor,
A holding unit capable of holding a cutting tool driven by the motor and capable of cutting a work material;
A battery mounting part capable of mounting a battery for supplying power to the motor,
A power tool in which a communication adapter for operating an external device in conjunction with driving of the motor is disposed in the battery mounting portion.
The electric tool according to claim 1,
The battery mounting part is formed with an intake port that can take in outside air,
The holding part is formed with an exhaust port through which outside air taken in from the intake port can be sent out through the air passage,
The communication adapter is an electric tool arranged on the opposite side of the air passage with the intake port as a boundary and between a terminal board for mounting the battery and a controller for controlling the motor.
A motor,
A holding unit capable of holding a cutting tool driven by the motor and capable of cutting a work material;
A power supply unit for supplying power to the motor,
A power tool in which a communication adapter for operating an external device in conjunction with driving of the motor is disposed between the motor and the power supply unit.
The electric tool according to claim 3,
The power supply unit is formed with an intake port capable of taking outside air,
The holding part is formed with an exhaust port through which outside air taken in from the intake port can be sent out through the air passage,
The communication adapter is an electric tool disposed on the opposite side of the air passage with the intake port as a boundary.
The electric tool according to claim 3,
The communication adapter is an electric tool arranged on an opening side of a case of a controller for controlling the motor.
The power tool according to claim 5,
The power supply unit is formed with an intake port capable of taking outside air,
The holding part is formed with an exhaust port through which outside air taken in from the intake port can be sent out through the air passage,
The electric tool connected to the communication adapter is covered with a rib so as to be shielded against the air passage.
A motor,
A holding unit capable of holding a cutting tool driven by the motor and capable of cutting a work material;
A motor housing that houses the motor;
A grip housing extending from the motor housing,
A power tool in which a communication adapter for operating an external device in conjunction with driving of the motor is disposed on the side of the grip housing opposite to the motor housing.
The electric tool according to claim 7,
On the side of the grip housing opposite to the motor housing, an intake port capable of taking outside air is formed,
The holding part is formed with an exhaust port through which outside air taken in from the intake port can be sent out through the air passage,
The communication adapter is disposed on the opposite side of the air passage with the intake port as a boundary,
A power tool in which a shift dial for shifting the motor is arranged on the side of the grip housing opposite to the motor housing.
The power tool according to any one of claims 1 to 8,
The cutting tool is a power tool that is a disc-shaped grindstone.
The power tool according to any one of claims 1 to 9,
The external device is a power tool that is a dust collector.