WO2018221262A1

WO2018221262A1 - Electric power tool

Info

Publication number: WO2018221262A1
Application number: PCT/JP2018/019249
Authority: WO
Inventors: 真司小野田; 斉飯田; 英暉辻; 正規古澤
Original assignee: 株式会社マキタ
Priority date: 2017-05-30
Filing date: 2018-05-18
Publication date: 2018-12-06
Also published as: JP6991743B2; JP2018202493A; DE212018000199U1; CN211193757U

Abstract

The purpose of the present invention is to dispose a communication adapter at an optimum position even if the power tool is small. A power tool (1) has a motor (32), a tip tool (80) driven by the motor (32) to perform a hammering operation and/or a rotation operation, and a communication adapter (64) for operating an external device in conjunction with the driving of the motor (32). As viewed from the side of the power tool (1), the motor (32) is disposed in such a manner that the axis of a drive shaft (34) of the motor (32) intersects with the axis of the tip tool (80). The communication adapter (64) is disposed below the motor (32).

Description

Electric tool

The present invention relates to a power tool, and in particular, a power tool including a tip tool driven to rotate and / or strike by a motor, and a communication adapter for operating an external device in conjunction with driving of the motor. About.

Conventionally, when drilling or cutting a gypsum material such as concrete or brick, an electric tool such as a hammer or a hammer drill has been used. When using such a power tool, dust and cutting waste are generated, so connect the power tool's bit vicinity (for example, a dust collection cup that covers the hammer bit and drill bit) and external equipment such as a dust collector in advance with a hose. In addition, the drilling operation and the chipping operation are performed while operating the external device (see Patent Document 1). When the hose is connected in this way, the generated dust, cutting waste, and the like can be directly sucked from the vicinity of the bit of the electric tool, so that the generated dust, cutting waste, and the like can be suppressed from being scattered in the work place. Therefore, it is possible to prevent the work environment in the workplace from deteriorating. 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. According to this technique, it is not necessary for the operator 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 this switch operation.

However, in the technique of Patent Document 1 described above, it is necessary to electrically connect the power tool and the dust collector via a cable. For this reason, there has been a problem that this cable is bothersome and annoying when performing drilling work or chipping work (when using a power tool). In order to solve this problem, it has been considered to electrically connect the power tool and the dust collector via wireless communication. However, in this idea, it is necessary to arrange a communication adapter (for example, a communication device) in each of the electric tool and the external device. Therefore, when the power tool is a small tool such as a hammer or a hammer drill, the position where the communication adapter is arranged may be limited.

The present invention is intended to solve such a problem, and an object of the present invention is to be able to arrange a communication adapter at an optimal position even if the power tool is small.

The above problems are solved by the following inventions. 1st invention is an electric tool provided with the motor, the tip tool driven so that a striking operation and / or rotation operation may be carried out by the motor, and the communication adapter for operating an external apparatus in conjunction with the drive of the motor . The motor is arranged such that the axis of the drive shaft intersects the axis of the tip tool in a side view of the electric tool. The communication adapter is disposed below the motor.

According to the first invention, the communication adapter can be arranged at an optimum position even if the power tool is small.

The second invention is the electric tool according to the first invention, and includes a battery pack as a power source. The communication adapter is disposed above the battery pack.

According to the second invention, the cable for electrically connecting the communication adapter and the battery pack can be shortened.

According to a third aspect of the present invention, there is provided a motor, a tip tool driven so as to perform a striking motion and / or a rotational motion by the motor, a motion conversion mechanism provided on an intermediate shaft disposed in parallel to the tip tool, An electric tool including a communication adapter for operating an external device in conjunction with driving of a motor. The communication adapter is disposed at a rear position of the striking mechanism that strikes the tip tool by the driving force of the motor converted by the motion conversion mechanism.

According to the third invention, the communication adapter can be arranged at an optimum position even if the power tool is small.

The fourth invention is the electric tool according to the third invention, and includes a motor for driving the tip tool. The communication adapter is disposed above the motor.

According to the fourth invention, the communication adapter can be arranged at a more optimal position even if the power tool is small.

A fifth invention is an electric tool comprising a motor, a tip tool driven so as to perform a striking operation and / or a rotating operation by the motor, and a communication adapter for operating an external device in conjunction with the driving of the motor. is there. The motor is arranged such that the axis of the drive shaft is parallel to the axis of the tip tool in a side view of the electric tool. The communication adapter is disposed at a rear position of the motor.

According to the fifth invention, even if the power tool is small, the communication adapter can be arranged at an optimal position.

The sixth invention is the electric power tool according to the fifth invention, comprising a hand grip having a trigger for driving the motor. The communication adapter is disposed above the hand grip.

According to the sixth invention, the communication adapter can be arranged at a more optimal position even if the power tool is small.

A seventh invention is an electric tool including a motor, a tip tool driven so as to perform a striking operation and / or a rotating operation by the motor, and a communication adapter for operating an external device in conjunction with the driving of the motor. . The communication adapter is an electric tool arranged on a side that is prevented from vibration caused by driving and / or striking operation of the motor.

According to the seventh aspect of the invention, it is possible to prevent adverse effects caused by vibrations caused by driving the motor.

An eighth invention is an electric tool including a motor, a tip tool driven so as to perform a striking operation and / or a rotating operation by the motor, and a communication adapter for operating an external device in conjunction with the driving of the motor. . The external device is a dust collection attachment having a drive source capable of sucking dust and cutting waste. This dust collection attachment is detachable from the electric tool itself.

According to the eighth aspect of the invention, dust and cutting debris can be sucked by installing a removable dust collection attachment without providing a separate dust collector.

The ninth invention is the power tool according to any one of the first to eighth inventions, and the external device is stopped after a predetermined time from the stop of the motor.

According to the ninth aspect of the invention, for example, it is possible to prevent dust collected or cutting waste from remaining in the hose connecting the dust cup and the dust collector.

1 is a side view of a hammer drill according to Embodiment 1. FIG. In FIG. 1, it is a figure which shows the state which absorbed the vibration. In FIG. 1, it is the longitudinal cross-sectional view of the state which mounted | wore with the dust collection cup. 6 is a longitudinal sectional view of a hammer drill according to Embodiment 2. FIG. It is a longitudinal cross-sectional view of the dust collection attachment which can be mounted | worn with the hammer drill of FIG. It is a longitudinal cross-sectional view of the state which mounted | wore the hammer drill of FIG. 4 with the dust collection attachment. It is a longitudinal cross-sectional view of the hammer drill which concerns on Example 3, and is a figure which shows the state equipped with the dust collection attachment.

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. In the following description, “hammer drill 1” and “drill bit 80” will be described as examples of “power tool” and “tip tool”. Further, in the following description, “up”, “down”, “front”, “rear”, “left”, “right” refers to the directions of “up”, “down”, “front”, “rear”, “left”, “right” described in the above-described drawings. When up, down, front, back, left, right are shown. The same applies to Examples 2 to 3 described later.

As shown in FIG. 1, the hammer drill 1 mainly includes a main body housing 10 that forms an outline of the hammer drill 1, a motor housing 30 in which a motor (brushless motor) 32 is assembled below, and a grip portion 42. A hand grip 40 assembled to the rear of the main body housing 10 and a battery mounting portion 50 assembled so as to straddle the motor housing 30 and the hand grip 40 so that two battery packs 70 can be mounted. Has been. The motor 32 is electrically connected to a controller 60 described later.

Inside the main body housing 10 are a motion conversion mechanism 12 that converts the rotational force of the motor 32 into a linear force, a striking mechanism 14 that strikes a drill bit 80 described later, and a power transmission mechanism that rotates the drill bit 80 described later. 16 (see FIG. 3). A motor 32 is assembled in the motor housing 30. The motor 32 is assembled in the motor housing 30 so that the axis of the drive shaft (output shaft) 34 intersects the axis of a drill bit 80 described later in a side view of the hammer drill 1. .

The motion conversion mechanism 12, the striking mechanism 14, the power transmission mechanism 16, and the motor housing 30 (motor 32) are provided with three compression springs 18 (two on the upper side so as to straddle the main body housing 10 and the battery mounting portion 50. In addition, it is elastically assembled via a total of three compression springs 18) on the lower side. FIG. 1 shows an initial state before the hammer drill 1 operates. In this initial state, the three compression springs 18 are assembled in a slightly compressed state. On the other hand, FIG. 2 shows an operation state after the hammer drill 1 is operated. In this operation state, the three compression springs 18 are greatly compressed and absorb vibration. The hand grip 40 is assembled with a trigger 44 that turns on an internal switch 46 when an operator performs a pulling operation.

The projecting

portions

52 and 54 projecting downward are formed on the front and rear sides of the battery mounting unit 50. Further, on the lower surface 50c of the battery mounting portion 50, two battery packs 70 serving as a power source can be mounted so as to be arranged in the front-rear direction so as to be sandwiched between the front and rear projecting

portions

52, 54. When two battery packs 70 are attached to the battery attachment unit 50, a controller 60 (to be described later) and the two battery packs 70 are electrically connected. Therefore, power is supplied to the hammer drill 1.

Of the two battery packs 70 mounted, the front battery pack 70 is mounted on the battery mounting portion 50 so as to be positioned immediately below the motor 32. Of the two battery packs 70 mounted, the front battery pack 70 is configured such that its front side is covered with the front overhanging portion 52. Contrary to this, among the two battery packs 70 mounted, the rear battery pack 70 is configured such that its rear side is covered by the rear protruding portion 54. The

lower surfaces

52a and 54a of the

overhang portions

52 and 54 are set so as to be positioned slightly below the lower surfaces 70a of the two battery packs 70. Therefore, even if the hammer drill 1 is dropped, these

overhang portions

52 and 54 protect the two battery packs 70. Therefore, damage to the two battery packs 70 can be suppressed.

Further, the mounting of the battery pack 70 referred to here is an assembly in which the battery pack 70 can be attached to or detached from the battery mounting portion 50. This attachment is performed by sliding the battery pack 70 from the left side to the right side of the lower surface 50c of the battery mounting portion 50 and locking the battery pack 70 that has been slid by a lock mechanism (not shown).

Further, this removal is performed by unlocking (releasing the lock) the battery pack 70 locked by the lock mechanism and sliding the unlocked battery pack 70 from the right side to the left side. The battery pack 70 includes a rechargeable battery (not shown) made of lithium ions with an output voltage of DC 18V. These two battery packs 70 are electrically connected in series. Therefore, the voltage of the power supply of the hammer drill 1 can be doubled (for example, DC18V × 2 = DC36V). Therefore, it is possible to cope with the hammer drill 1 having a high power supply voltage. Of course, when the hammer drill 1 has a low power supply voltage, these two battery packs 70 can be electrically connected in parallel to double the capacity of the power supply of the hammer drill 1 for long working hours. You can do it.

In addition, a controller 60 is assembled inside the battery mounting unit 50. The controller 60 is composed of an aluminum case containing a circuit board (all not shown) on which FETs, capacitors, microcomputers, LEDs and the like corresponding to the coils of the motor 32 are mounted. The controller 60 includes a microcomputer (not shown) including a CPU and a memory. This memory includes semiconductor memory such as RAM, ROM, and flash memory.

Further, in this memory, various programs and data for realizing various functions of the hammer drill 1 are stored. Various functions of the hammer drill 1 are realized by the CPU executing various programs stored in the memory. The various functions realized by the controller 60 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 50 is provided with a connector 62 electrically connected to the controller 60. Specifically, as is apparent from FIG. 3, the connector 62 is disposed below the motor 32, above the front battery pack 70, and at the front position of the controller 60. A communication adapter 64 can be attached to (detached from) the connector 62 via an adapter insertion port 50 a formed on the right side surface of the battery attachment portion 50.

Since the communication adapter 64 can be attached to the connector 62 in this manner, the communication adapter 64 is disposed at a position below the motor 32, above the front battery pack 70, and at a position in front of the controller 60. Will be. With this arrangement, the communication adapter 64 is arranged with respect to the motor 32 via the two compression springs 18. That is, the communication adapter 64 is disposed on the side that is prevented from vibration from the drive of the motor 32.

When the communication adapter 64 is attached to the connector 62, the controller 60 and the communication adapter 64 are electrically connected. Further, the battery mounting portion 50 is provided with a cap 50b that covers the adapter insertion port 50a. Therefore, the communication adapter 64 attached to the connector 62 can be protected from dust and water droplets. The hammer drill 1 is configured in this way.

Next, the operation of the hammer drill 1 described above will be described. First, an operator (not shown) performs an operation of pulling the trigger 44 while holding the grip portion 42 of the hand grip 40. Then, the operation of pulling the trigger 44 is converted into an electrical signal (ON signal of the trigger 44) via the switch 46 and output to the controller 60. Then, the drive shaft 34 of the motor 32 is rotated by the ON signal of the trigger 44 input to the controller 60. As a result, the rotational force of the drive shaft 34 of the motor 32 is converted to a linear force in which the piston 20b reciprocates back and forth in the cylinder 20 via the motion conversion mechanism 12.

The converted linear force is transmitted to the drill bit 80 via the striking mechanism 14. That is, since the striker 22 also reciprocates back and forth in the cylinder 20 through the pressure fluctuation of the air chamber 20a in the cylinder 20 (the action of the air spring), the striker 22 that has reciprocated collides with the impact bolt 24 (blows). ) Will be repeated. Therefore, this repeated collision is transmitted to the drill bit 80 as an impact force through the impact bolt 24. This description corresponds to the “hitting operation” described in the claims.

At the same time, the rotational force of the drive shaft 34 of the motor 32 is converted to the rotational force that rotates the tool holder 26 via the power transmission mechanism 16. Therefore, this rotational force is transmitted to the drill bit 80 as it is. This description corresponds to the “rotation operation” described in the claims. Therefore, since the drill bit 80 also rotates in addition to the impact, the efficiency of the gypsum drilling operation can be increased.

The dust collecting cup 90 can be attached to the hammer drill 1 operating in this way (see FIG. 3). The dust collecting cup 90 is mainly communicated with a first cylindrical portion 92 inserted into an operation sleeve 82 assembled to the front end of the main body housing 10 and a front end (tip) of the first cylindrical portion 92. The second cylindrical portion 94 covers the periphery of the drill bit 80.

The second cylindrical portion 94 is made of an elastic bellows-like resin member. Therefore, the length of the second cylindrical portion 94 can be shortened with the progress of the drilling depth of the material (not shown) in the drill bit 80. Therefore, during the operation of the hammer drill 1, the periphery of the drill bit 80 can always be covered by the second cylindrical portion 94. In addition, on the front end side of the first cylindrical portion 92, a third cylindrical portion 96 that is inclined downward toward the rear side is formed. The dust collection cup 90 is configured in this way.

Note that a hose 98 of a stationary dust collector (not shown) can be inserted into the opening 96a of the third cylindrical portion 96. Therefore, when the dust collector hose 98 is inserted into the opening 96 a and the dust collector is operated, the dust and cutting waste discharged by the work by the hammer drill 1 can be sucked through the hose 98. This dust collector corresponds to an “external device” recited in the claims. In addition, like the hammer drill 1, a connector electrically connected to the controller is provided inside the dust collector.

The communication adapter (both not shown) can be attached (can be inserted and removed) to this connector through an adapter insertion port formed on the side surface of the dust collector. Therefore, when a communication adapter is attached to this connector, the controller and the communication adapter are electrically connected in the same manner as the hammer drill 1. In addition, the communication adapter 64 of the hammer drill 1 and the communication adapter of the dust collector can be electrically connected via wireless communication. Therefore, various signals (for example, a linked operation command based on the driving of the motor 32 and a linked stop command based on the stop of the motor 32) can be transmitted and received between the controller 60 of the hammer drill 1 and the controller of the dust collector. Yes.

In addition, when the communication adapter of the dust collector receives the linked operation command from the communication adapter 64 of the hammer drill 1, the received linked operation command is output to the controller of the dust collector. Thereby, the controller of a dust collector will drive a motor. On the other hand, when the communication adapter of the dust collector receives the interlock stop command from the communication adapter 64 of the hammer drill 1, it outputs this received interlock stop command to the controller of the dust collector. Thereby, the controller of the dust collector stops the motor. In this way, an interlocking operation between the hammer drill 1 and the dust collector is realized.

Note that when the interlock stop command is input from the communication adapter, the dust collector controller may appropriately determine when to stop the motor. For example, it may be stopped immediately after an interlock stop command is input. Further, for example, after the interlock stop command is input, it may be stopped after a predetermined time. That is, after the motor 32 of the hammer drill 1 is stopped, the dust collector motor may be continuously driven for a predetermined time.

Further, as described above, in order to link the hammer drill 1 and the dust collector, the communication adapter 64 of the hammer drill 1 and the communication adapter of the dust collector are set in a state in which one-to-one wireless communication is possible. Both the communication adapters 64 need to be paired. In order to perform this pairing, the adapter adapter (not shown) is provided in the communication adapter 64 of the hammer drill 1, and the adapter switch is also provided in the communication adapter of the dust collector.

Specifically, the pairing is performed as follows. First, when an operator turns on the adapter switch of the communication adapter of the dust collector, the communication adapter is set in a pairing standby state. Thereafter, when the operator turns on the adapter switch of the communication adapter 64 of the hammer drill 1, predetermined data communication for pairing is performed between the two communication adapters 64. As a result, pairing of the two communication adapters 64 is performed. Is completed.

When this pairing is completed, one-to-one data communication is possible between the two communication adapters 64, and as described above, an interlocking command (interlocking operation command or interlocking stop command) is wirelessly transmitted from the communication adapter 64 of the hammer drill 1. Then, when it is received by the communication adapter of the dust collector, the dust collector is linked or stopped in accordance with the linkage command. Note that the function of each communication adapter 64 is not limited to pairing and transmission / reception of interlocking commands, but can also transmit / receive various other information.

The hammer drill 1 according to the first embodiment of the present invention is configured as described above. According to this configuration, the motor 32 is arranged inside the motor housing 30 so that the shaft center of the drive shaft (output shaft) 34 intersects the shaft center of a drill bit 80 described later in a side view of the hammer drill 1. It is assembled to. In addition, the communication adapter 64 is disposed below the motor 32. Therefore, even if the power tool is a small tool such as the hammer drill 1, the communication adapter 64 can be arranged at an optimal position.

Further, according to this configuration, the hammer drill 1 includes the battery pack 70 as a power source. The communication adapter 64 is disposed above the battery pack 70. Therefore, the cable that electrically connects the communication adapter 64 and the battery pack 70 can be shortened.

Further, according to this configuration, the communication adapter 64 is disposed on the side where vibration is prevented from driving the motor 32. Therefore, it is possible to prevent an adverse effect associated with the vibration generated by driving the motor 32.

Further, according to this configuration, the dust collector is stopped after a predetermined time after the interlock stop command is input. Therefore, it is possible to prevent dust and cutting dust collected from remaining in the hose 98 connecting the dust collection cup 90 and the dust collector.

(Example 2)
Next, Example 2 of the present invention will be described with reference to FIGS. Compared with the hammer drill 1 of Example 1 already described, the hammer drill 101 of Example 2 is a form in which the motion conversion mechanism 112 is a swash type. In the following description, members having the same configurations as those described in 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. 4, the hammer drill 101 also mainly includes a main body housing 110 that forms an outline thereof, a motor housing 130 in which a motor (brushless motor) 132 is assembled below, and a grip portion 142. A hand grip 140 assembled to the rear of the main body housing 110 and a battery mounting portion 150 assembled so as to straddle the motor housing 130 and the hand grip 140 so that two battery packs 70 can be mounted. Has been.

Inside the main body housing 110, a motion conversion mechanism 112 provided on an intermediate shaft 136 that is arranged in parallel to a drill bit 180 described later and is rotated by the rotational force of the motor 132, and a drill bit 180 described later are struck. A striking mechanism 114 that rotates and a power transmission mechanism 116 that rotates a drill bit 180, which will be described later, are assembled (see FIG. 4). A motor 132 is assembled inside the motor housing 130. The motor 132 is assembled inside the motor housing 130 so that the axis of the drive shaft (output shaft) 134 intersects the axis of a drill bit 180 (to be described later) in a side view of the hammer drill 101. .

The term “intersection” as used herein means that both axes are not parallel. In the second embodiment, as is clear from FIG. 4, the lower part of the motor 132 is positioned forward from the upper part of the motor 132. The motor 132 is tilted. Accordingly, since the motor 132 can be disposed in front of the hammer drill 101, the controller 60 and the two battery packs 70 can also be disposed in front of the hammer drill 101. Therefore, it is possible to prevent the center of gravity of the hammer drill 101 from being rearward. Therefore, the operability of the hammer drill 101 can be improved. Of course, the assembly of the motor 132 is not limited to the inclination described above, and the motor 132 may be assembled so that the axis of the drive shaft 134 of the motor 132 is orthogonal to the axis of the drill bit 180. .

The motion conversion mechanism 112, the striking mechanism 114, the power transmission mechanism 116, and the motor housing 130 (motor 132) are elastically assembled via a compression spring 118 so as to straddle the main body housing 110 and the battery mounting portion 150. It has become. The main body housing 110 is provided with a connector 62 that is electrically connected to the controller 60. Specifically, as apparent from FIG. 4, the connector 62 is disposed at a position behind the striking mechanism 114 that strikes the drill bit 180 by the driving force of the motor 132 converted by the motion converting mechanism 112 and above the motor 132. Placed in position. A communication adapter 64 can be attached to (detached from) the connector 62 via an adapter insertion port 110 a formed on the right side surface of the main body housing 110.

Since the communication adapter 64 can be attached to the connector 62 in this way, the communication adapter 64 is disposed at the rear position of the striking mechanism 114 and at the upper position of the motor 132.

When the communication adapter 64 is attached to the connector 62, the controller 60 and the communication adapter 64 are electrically connected. Further, the main body housing 110 is provided with a cap (not shown) that covers the adapter insertion slot 110a. Therefore, the communication adapter 64 attached to the connector 62 can be protected from dust and water droplets. The hand grip 140 is assembled with a trigger 144 that turns on an internal switch 146 when an operator performs a pulling operation.

Further, two battery packs 70 serving as a power source can be mounted on the lower surface 150c of the battery mounting portion 150 so as to be lined up and down. When two battery packs 70 are attached to the battery attachment unit 150, the controller 60 and the two battery packs 70 are electrically connected. Therefore, power is supplied to the hammer drill 101.

Of the two battery packs 70 mounted, the front battery pack 70 is mounted on the battery mounting portion 150 so as to be positioned behind the motor 132. Of the two battery packs 70 mounted, the front battery pack 70 has a front side covered with a motor housing 130. Therefore, even if the hammer drill 101 is dropped, the motor housing 130 protects the battery pack 70 on the front side. Accordingly, damage to the front battery pack 70 can be suppressed. In addition, the controller 60 is assembled inside the battery mounting unit 150. The hammer drill 101 is configured in this way.

Next, the operation of the hammer drill 101 described above will be described. First, an operator (not shown) performs an operation of pulling the trigger 144 while holding the grip 142 of the hand grip 140. Then, the operation of pulling the trigger 144 is converted into an electrical signal (ON signal of the trigger 144) via the switch 146 and output to the controller 60. Then, the drive shaft 134 of the motor 132 is rotated by the ON signal of the trigger 144 input to the controller 60.

Thereby, the rotational force of the drive shaft 134 of the motor 132 is transmitted as the rotational force of the intermediate shaft 136 via the gear 134a. Therefore, since the swash bearing 138 swings through the boss sleeve 136a, the piston cylinder 138b pivotally attached to the connecting arm 138a is reciprocated back and forth. In other words, the rotational force of the drive shaft 134 of the motor 132 is converted into a linear force in which the tip of the connecting arm 138a reciprocates back and forth via the motion conversion mechanism 112.

The converted linear force is transmitted to the drill bit 180 via the striking mechanism 114. That is, since the striker 122 also reciprocates back and forth in the piston cylinder 138b through the pressure fluctuation (the action of the air spring) in the air chamber 120a in the piston cylinder 138b, the reciprocating striker 122 collides with the impact bolt 124. (Blow) will be repeated. Therefore, this repeated collision is transmitted to the drill bit 180 as an impact force through the impact bolt 124. This description corresponds to the “hitting operation” described in the claims.

At the same time, the rotational force of the drive shaft 134 of the motor 132 is converted into the rotational force that rotates the tool holder 126 via the power transmission mechanism 116. Therefore, this rotational force is transmitted to the drill bit 180 as it is. This description corresponds to the “rotation operation” described in the claims. Therefore, since the drill bit 180 also rotates in addition to the impact, the efficiency of the above-described gypsum drilling operation can be increased.

The hammer drill 101 operating in this way can be fitted with a dust collection attachment 190 (see FIGS. 4 to 6). This dust collection attachment 190 is a known one that can be attached to or detached from the hammer drill 101, and a main body housing 192 having a dust collection fan 192a assembled therein, a main body housing 192 connected to the main body housing 192, and a drill. It is comprised from the substantially L-shaped cylinder part 194 which has the opening 194c in which the front-end | tip of the bit 180 is inserted. When the motor 192 b of the dust collection attachment 190 is driven, the dust and cutting waste discharged by the work by the hammer drill 101 can be sucked through the cylindrical portion 194.

Then, the sucked dust and cutting waste are collected in the dust collection box 192c of the main body housing 192. The dust collection attachment 190 corresponds to an “external device” recited in the claims. In addition, this cylinder part 194 is provided with the expandable bellows-like resin member. Further, two

cylinders

194a and 194b are provided outside the cylinder part 194, and one cylinder 194a is inserted into the other cylinder 194b. Therefore, the length of the dust collection attachment 190 can be shortened as the drilling depth of a material (not shown) in the drill bit 180 progresses. Therefore, during the operation of the hammer drill 101, the periphery of the drill bit 180 can always be covered by the dust collection attachment 190 (cylinder portion 194a).

In the main body housing 192, a connector 192d that is electrically connected to a controller (not shown) is provided in the same manner as the dust collector described in the first embodiment. A communication adapter 192f can be attached to (detached from) the connector 192d via an adapter insertion port 192e formed on the side surface of the main body housing 192. This communication adapter 192f is the same as the communication adapter of the dust collector described in the first embodiment.

Therefore, also in the second embodiment, as in the first embodiment, the interlocking operation of the hammer drill 101 and the dust collection attachment 190 can be realized. When the dust collection attachment 190 is attached to the hammer drill 101, the power input terminal 192g of the dust collection attachment 190 is connected to the power output terminal 130a of the hammer drill 101 that is electrically connected to the battery pack 70. . Therefore, power can be supplied to the controller, motor 192b, and communication adapter 192f of the dust collection attachment 190. The dust collection attachment 190 is configured in this way.

The hammer drill 101 according to the second embodiment of the present invention is configured as described above. According to this configuration, the communication adapter 64 is disposed at the rear position of the striking mechanism 114. Therefore, even if the power tool is a small tool such as the hammer drill 101, the communication adapter 64 can be arranged at an optimal position.

Further, according to this configuration, the hammer drill 101 is provided with the motor 132 that drives the drill bit 180. The communication adapter 64 is disposed above the motor 132. Therefore, even if the power tool is small, such as the hammer drill 101, the communication adapter 64 can be arranged at a more optimal position.

Further, according to this configuration, the hammer drill 101 is equipped with the dust collection attachment 190 capable of sucking dust and cutting waste. Therefore, as described in the first embodiment, dust and cutting waste can be sucked without providing a separate dust collector.

(Example 3)
Next, Embodiment 3 of the present invention will be described with reference to FIG. The hammer drill 201 according to the third embodiment has a configuration in which the axial direction of the motor 232 is arranged sideways as compared with the hammer drill 101 according to the second embodiment described above.

As shown in FIG. 7, the hammer drill 201 also mainly includes a main body housing 210 that forms an outer shell thereof, and a hand grip 240 that is assembled to the rear of the main body housing 210 so as to have a grip portion 242. Has been.

Inside the main body housing 210, a motion conversion mechanism 212 provided on an intermediate shaft 236 that is arranged in parallel to a drill bit 280 described later and is rotated by the rotational force of the motor 232, and a drill bit 280 described later are struck. A striking mechanism 214 that rotates and a power transmission mechanism 216 that rotates a drill bit 280 to be described later are assembled (see FIG. 7). A motor (brushless motor) 232 is assembled in the main body housing 210. The motor 232 is assembled to the rear of the inside of the main body housing 210 so that the shaft center of the drive shaft (output shaft) 234 is parallel to the shaft center of a drill bit 280 described later in a side view of the hammer drill 201. It has been.

The main body housing 210 is provided with a connector 62 electrically connected to a controller (not shown). Specifically, as apparent from FIG. 7, the connector 62 is disposed at the rear position of the motor 232 and at the upper position of the hand grip 240. A communication adapter 64 can be attached to (detached from) the connector 62 via an adapter insertion port 210 a formed on the right side surface of the main body housing 210. Since the communication adapter 64 can be attached to the connector 62 in this way, the communication adapter 64 is disposed at the rear position of the motor 232 and at the upper position of the hand grip 240.

When the communication adapter 64 is attached to the connector 62, the controller (not shown) and the communication adapter 64 are electrically connected. The main body housing 210 is provided with a cap (not shown) that covers the adapter insertion opening 210a. Therefore, the communication adapter 64 attached to the connector 62 can be protected from dust and water droplets. In addition, a controller (not shown) is assembled inside the main body housing 210. The handgrip 240 is assembled with a trigger 244 that turns on an internal switch (not shown) when the operator performs a pulling operation. The hammer drill 201 is supplied with power from a commercial power source (AC 100 V) such as an outlet (not shown). The hammer drill 201 is configured in this way.

Next, the operation of the above-described hammer drill 201 will be described. First, an operator (not shown) performs an operation of pulling the trigger 244 while holding the grip 242 of the hand grip 240. Then, the operation of pulling the trigger 244 is converted into an electrical signal (ON signal of the trigger 244) via the switch and output to a controller (not shown). Then, the drive shaft 234 of the motor 232 is rotated by the ON signal of the trigger 244 input to this controller (not shown).

Thereby, the rotational force of the drive shaft 234 of the motor 232 is transmitted as the rotational force of the intermediate shaft 236 via the gear 234a. Therefore, since the swash bearing 238 swings through the boss sleeve 236a, the piston cylinder 238b pivotally attached to the connecting arm 238a is reciprocated back and forth against the bias of the compression spring 238c. That is, the rotational force of the drive shaft 234 of the motor 232 is converted to a linear force in which the tip of the connecting arm 238a reciprocates back and forth via the motion conversion mechanism 212.

The converted linear force is transmitted to the drill bit 280 via the striking mechanism 214. That is, since the striker 222 also reciprocates back and forth in the piston cylinder 238b through the pressure fluctuation (the action of the air spring) of the air chamber 220a in the piston cylinder 238b, the reciprocating striker 222 collides with the impact bolt 224. (Blow) will be repeated. Therefore, this repeated collision is transmitted to the drill bit 280 as an impact force through the impact bolt 224. This description corresponds to the “hitting operation” described in the claims. Therefore, it is possible to drill a gypsum material such as concrete or brick through the drill bit 280.

At the same time, the rotational force of the drive shaft 234 of the motor 232 is converted into the rotational force that rotates the tool holder 226 via the power transmission mechanism 216. Therefore, this rotational force is transmitted to the drill bit 280 as it is. This description corresponds to the “rotation operation” described in the claims. Therefore, since the drill bit 280 also rotates, the efficiency of the gypsum drilling operation described above can be increased.

The dust collecting attachment 190 can be attached to the hammer drill 201 that operates in this manner, like the hammer drill 101 of the second embodiment. Therefore, in the third embodiment, similarly to the second embodiment, when the motor 192b of the dust collection attachment 190 is driven, the dust and cutting waste discharged by the work by the hammer drill 201 can be sucked through the cylindrical portion 194. . Also in this third embodiment, as in the second embodiment, the interlocking operation of the hammer drill 201 and the dust collection attachment 190 can be realized.

The hammer drill 201 according to the third embodiment of the present invention is configured as described above. According to this configuration, the communication adapter 64 is disposed at the rear position of the motor 232. Therefore, even if the power tool is a small tool such as the hammer drill 201, the communication adapter 64 can be arranged at an optimal position.

Further, according to this configuration, the communication adapter 64 is disposed above the hand grip 240. Therefore, even if the power tool is a small tool such as the hammer drill 201, the communication adapter 64 can be arranged at a more optimal position.

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 of the embodiments, the form in which the external device is the dust collector and the dust collection attachment 190 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. In that case, in conjunction with the

hammer drill

1, 101, 201, water is ejected from an external device, light is emitted, or a sound is emitted.

In each embodiment, the

hammer drills

1, 101, 201 have been described as examples of the electric tool. However, the present invention is not limited to this, and a hammer may be used as an example of the power tool. In that case, the

drill bits

80, 180, and 280 as the tip tools are replaced with hammer bids, and only the striking operation is performed.

Further, in the first embodiment, the form of one dust collector has been described. However, the present invention is not limited to this, and two dust collectors may be used. In this case, for example, a dust collection BOX that receives dust and cutting waste discharged by the work by the hammer drill 1 is provided, and the dust collection BOX and the two dust collectors are connected to each other via a hose 98. Then, the two dust collectors operate in conjunction with the operation of the hammer drill 1 as in the case of one dust collector. Thus, when two dust collectors operate | move, the dust collection power of dust and cutting waste can be raised.

Claims

A motor,
A tip tool driven to perform a striking motion and / or a rotational motion by the motor;
A communication adapter for operating an external device in conjunction with driving of the motor, and
The motor is arranged such that the axis of the drive shaft intersects the axis of the tip tool in a side view,
The communication adapter is a power tool disposed at a position below the motor.
The electric tool according to claim 1,
It has a battery pack as a power source,
The communication adapter is an electric tool arranged at an upper position of the battery pack.
A motor,
A tip tool driven to perform a striking motion and / or a rotational motion by the motor;
A motion conversion mechanism provided on an intermediate shaft disposed parallel to the tip tool;
A communication adapter for operating an external device in conjunction with driving of the motor, and
The communication adapter is an electric tool disposed at a rear position of a striking mechanism that strikes the tip tool by the driving force of the motor converted by the motion conversion mechanism.
The electric tool according to claim 3,
A motor for driving the tip tool;
The communication adapter is an electric tool arranged at a position above the motor.
A motor,
A tip tool driven to perform a striking motion and / or a rotational motion by the motor;
A communication adapter for operating an external device in conjunction with driving of the motor, and
The motor is arranged such that the axis of the drive shaft is parallel to the axis of the tip tool in a side view,
The communication adapter is an electric tool arranged at a rear position of the motor.
The power tool according to claim 5,
A hand grip having a trigger for driving the motor;
The communication adapter is a power tool disposed above the hand grip.
A motor,
A tip tool driven so as to perform a striking operation and / or a rotating operation by the motor, and a communication adapter for operating an external device in conjunction with the driving of the motor,
The communication adapter is an electric tool disposed on a side that is prevented from vibration caused by driving of the motor and / or striking operation.
A motor,
A tip tool driven to perform a striking motion and / or a rotational motion by the motor;
A communication adapter for operating an external device in conjunction with driving of the motor, and
The external device is a dust collection attachment having a drive source capable of sucking dust and cutting waste,
The dust collection attachment is a power tool that can be attached to and detached from the power tool itself.
The power tool according to any one of claims 1 to 8,
The electric tool is stopped after a predetermined time from the stop of the motor.