WO2015147015A1

WO2015147015A1 - Work tool

Info

Publication number: WO2015147015A1
Application number: PCT/JP2015/058987
Authority: WO
Inventors: 吉隆町田
Original assignee: 株式会社マキタ
Priority date: 2014-03-25
Filing date: 2015-03-24
Publication date: 2015-10-01
Also published as: JP2015182204A; JP6208061B2

Abstract

[Problem] To provide efficient technology related to the mounting of an auxiliary device in a work tool comprising a handle that is capable of movement relative to a tool main body. [Solution] A hammer drill (101) comprises: a main body section (103) that accommodates a drive motor (111) and a drive mechanism; and a handle (109) that is capable of movement relative to the main body section (103). The hammer drill (101) additionally comprises a coil spring (160) that biases the handle (109), and the transmission of vibration from the main body section (103) to the handle (109) during work is reduced by the handle (109) moving relative to the main body section (103) while said handle (109) is in a biased state. In addition, the hammer drill (101) comprises a dust collection device attachment section to which a dust collection device (200) is mounted.

Description

Work tools

The present invention relates to a work tool for driving a tip tool to perform a predetermined work.

International Publication No. 2007/068535 describes a rotary hammer having a drive unit and a transmission unit. The torque of the drive unit is transmitted to the transmission unit for work. The rotary hammer includes a housing unit that houses a transmission unit and a housing unit that houses a drive unit. The housing unit that houses the drive unit is formed integrally with the main handle. The housing unit that accommodates the transmission unit and the housing unit that accommodates the drive unit are configured to move relative to each other, thereby reducing vibration transmission between the housing units.

In the above rotary hammer, it is not intended that an electric auxiliary machine such as a dust collector or a lighting device is attached to the rotary hammer. In particular, in a working tool in which the housings move relative to each other, when an electric auxiliary machine is mounted, it is necessary to consider mounting modes such as the mounting location and mounting structure of the electric auxiliary machine.

The present invention has been made in view of the above, and it is an object of the present invention to provide a rational technique relating to the mounting of an electric auxiliary machine in a work tool whose handle can be moved relative to the tool body.

The above problem is solved by the present invention. According to a preferred embodiment of the work tool according to the present invention, the electric auxiliary machine is mounted so as to be portable in a single body, and the work tool performs the work by driving the tip tool in the long axis direction of the tip tool. Is configured. The electric auxiliary machine suitably includes a dust collector, a lighting device, an information display device, a laser irradiation device, and the like. This electric auxiliary machine is held integrally with the work tool when the work tool performs the machining work, and the machining work is performed. Therefore, it is preferable that the electric auxiliary machine has a function for assisting the machining operation. The work tool includes an electric motor having a motor shaft arranged in parallel to the long axis direction of the tip tool, a tool body in which the tip tool is mounted in the tip region, and a tool body that houses the electric motor; A handle component having a handle, an elastic member disposed between the tool body and the handle component, and an accessory mounting unit on which the electric accessory is detachably mounted . Typically, the tool body includes a housing and a tip tool holding portion housed in the housing. The handle component is configured to move relative to the tool body in a state in which the elastic force of the elastic member is applied, and to suppress vibration transmitted from the tool body to the handle component during machining operations. Yes. A handle having such an anti-vibration function is also referred to as an anti-vibration handle. Typically, the anti-vibration handle is configured to move relative to the tool body in a direction parallel to a main direction component of vibration generated during a machining operation. That is, in a work tool in which the tip tool generates a striking force in the long axis direction, vibration is generated mainly in the long axis direction of the tip tool. Therefore, it is preferable that the handle moves relative to the tool body in the long axis direction of the tip tool. Regarding the mounting of the auxiliary machine, it preferably includes a mode in which the auxiliary machine is mechanically connected to the work tool and / or a mode in which it is electrically connected.

According to the present invention, the electric motor is accommodated in the main body. Therefore, it is not necessary to use a special transmission member to transmit the power of the electric motor to the tip tool mounted on the tool body. Further, the handle is movable relative to the main body while being urged by the elastic member. Therefore, transmission of vibration from the tool body to the handle is reduced. Therefore, suppression of power transmission of the electric motor and vibration transmission to the handle can be achieved reasonably. In addition, an electric auxiliary machine can be mounted on a work tool having a vibration isolation handle.

According to the further form of the work tool which concerns on this invention, while an auxiliary equipment mounting part is provided in a handle | steering-wheel structure part, the work tool side terminal which can be electrically connected to the auxiliary machine side terminal of an electrically driven auxiliary machine is provided. Prepare. And by connecting the auxiliary machine side terminal and the work tool side terminal, power is supplied from the work tool to the electric auxiliary machine. The auxiliary machine side terminal is configured as one terminal of a male terminal or a female terminal, and the work tool side terminal is configured as the other terminal of the male terminal or the female terminal.

According to this embodiment, the handle constituting unit not only constitutes the handle gripped by the operator, but also supplies current to the electric auxiliary machine. That is, the handle component is configured as a member having a plurality of functions.

According to the further form of the work tool according to the present invention, the distance between the auxiliary machine side terminal and the work tool side terminal is always kept constant in a state where the electric auxiliary machine is mounted on the work tool. That is, the distance between the auxiliary machine side terminal and the work tool side terminal is kept constant even when the handle component moves relative to the tool body during the machining operation.

According to this embodiment, since the distance between the auxiliary machine side terminal and the work tool side terminal is always kept constant, chattering occurs between the auxiliary machine side terminal and the work tool side terminal due to vibration during machining operations. Is suppressed.

According to the further form of the work tool which concerns on this invention, an auxiliary machine mounting part is mechanically engaged with the auxiliary machine main-body part of an electrically driven auxiliary machine, and the auxiliary machine body which hold | maintains an auxiliary machine main-body part fixedly. A machine holding part is provided. This auxiliary machine holding part is provided in the tool main body. Further, the electric auxiliary machine is moved in the long axis direction of the tip tool and engaged with the auxiliary machine holding part. Further, the handle component moves relative to the tool body in the long axis direction of the tip tool. That is, the direction in which the electric auxiliary machine is moved with respect to the work tool when the electric auxiliary machine is attached to the work tool (also referred to as the attachment direction) coincides with the direction in which the handle component moves relative to the tool body. Typically, the accessory mounting part is configured by an accessory holding part provided in the tool main body and a work tool side terminal provided in the handle constituting part. The electric auxiliary machine is configured to move in the long axis direction of the tip tool with respect to the work tool and be attached to the work tool. It is preferable that the engagement of the machine main body part with the auxiliary machine holding part and the connection of the auxiliary machine side terminal to the work tool side terminal are achieved.

According to the further form of the work tool which concerns on this invention, an auxiliary machine mounting part is mechanically engaged with the auxiliary machine main-body part of an electrically driven auxiliary machine, and the auxiliary machine body which hold | maintains an auxiliary machine main-body part fixedly. It has a machine holding part. The auxiliary machine holding part is provided in the handle constituting part. Further, the handle component moves relative to the tool body together with the electric auxiliary machine. Typically, the accessory mounting portion is configured by an accessory holding portion and a work tool side terminal provided in the handle component, and the electric accessory is held only by the handle component. The electric auxiliary machine is configured to move in a predetermined direction with respect to the work tool and be attached to the work tool. By moving in the predetermined direction, the auxiliary machine holding part of the auxiliary machine main body part It is preferable that the engagement and the connection of the accessory side terminal to the work tool side terminal are achieved.

According to a further aspect of the work tool according to the present invention, a work tool including a removable electric auxiliary machine is configured. That is, an electrically operated work tool with an auxiliary machine is configured. The electric auxiliary machine has an auxiliary machine body and an auxiliary machine side terminal. And the auxiliary machine side terminal is relatively movable with respect to the auxiliary machine main-body part. Typically, the auxiliary machine main body is held by the tool main body or the handle component, and the auxiliary machine side terminal is connected to a work tool side terminal formed in the handle component. The direction in which the auxiliary machine side terminal moves relative to the auxiliary machine main body is the direction in which the electric auxiliary machine is moved relative to the work tool when the electric auxiliary machine is attached to the work tool. It is preferable to agree.

According to this embodiment, since the auxiliary machine side terminal can move relative to the auxiliary machine main body part, the auxiliary machine side terminal is held flexibly with respect to the auxiliary machine main body part. Thereby, the connection of the auxiliary machine side terminal and the work tool side terminal and the connection of the auxiliary machine body part and the work tool are reasonably achieved. In addition, the auxiliary machine side terminal is movable relative to the auxiliary machine main body in a state where the auxiliary machine side terminal is connected to the work tool side terminal. Therefore, the connection between the auxiliary machine side terminal and the work tool side terminal is stably maintained regardless of whether the auxiliary machine main body moves together with the handle component during the machining operation. Thereby, chattering between the auxiliary machine side terminal and the work tool side terminal is prevented.

According to a further aspect of the work tool according to the present invention, the electric auxiliary machine has an urging member disposed between the auxiliary machine side terminal and the auxiliary machine main body. The biasing member biases the accessory side terminal toward the work tool in a state where the electric auxiliary machine is mounted on the work tool. Typically, the biasing member biases the auxiliary machine side terminal toward the work tool side terminal. Furthermore, the accessory side terminal is movable relative to the accessory main body in a state in which the biasing force of the biasing member is applied.

According to this embodiment, since the auxiliary machine side terminal is urged toward the work tool, the connection between the auxiliary machine side terminal and the work tool is stably held by the urging force of the urging member.

According to the further form of the work tool which concerns on this invention, an electrically driven auxiliary machine is provided with the terminal holding part holding an auxiliary machine side terminal. And the terminal holding | maintenance part is relatively movable with respect to an auxiliary machine main-body part with an auxiliary machine side terminal. Typically, an urging member is disposed between the terminal holding part and the auxiliary machine main body part.

According to this embodiment, the terminal holding part can move relative to the auxiliary machine main body together with the auxiliary machine side terminal. Therefore, even when the accessory main body moves with respect to the work tool, the terminal holding part is reliably held with respect to the work tool (work tool side terminal) together with the accessory side terminal. Thereby, the connection of the auxiliary machine side terminal and the work tool side terminal is stably maintained.

ADVANTAGE OF THE INVENTION According to this invention, the rational technique regarding mounting | wearing with an electric auxiliary machine is provided in the working tool in which a handle | steering-wheel can move relatively with respect to a tool main body.
Other features, actions, and advantages of the present invention can be readily understood with reference to the specification, claims, and accompanying drawings.

It is a side view of the hammer drill concerning a 1st embodiment of the present invention. It is a sectional side view of a hammer drill. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. It is an exploded side view of a hammer drill. FIG. 5 is a sectional view taken along line VV in FIG. 2. FIG. 3 is a cross-sectional view taken along line VI-VI in FIG. 2. It is a sectional side view of a dust collector. It is side sectional drawing of the hammer drill with which the dust collector was mounted | worn. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. FIG. 9 is a cross-sectional view taken along line XX in FIG. It is a sectional side view which shows the state which the handle moved ahead. It is a side view of the hammer drill which concerns on 2nd Embodiment of this invention. It is a sectional side view of a hammer drill. It is a sectional side view which shows the state which the handle moved ahead.

The configurations and methods according to the above and the following descriptions are separately or separately from other configurations and methods in order to realize the manufacture and use of the “work tool” according to the present invention and the use of the components of the “work tool”. Can be used in combination. Exemplary embodiments of the present invention include these combinations and will be described in detail with reference to the accompanying drawings. The following detailed description is only to teach those skilled in the art with detailed information to implement preferred embodiments of the invention, and the scope of the invention is not limited by the detailed description, but is limited by the scope of the claims. It is determined based on the description. For this reason, combinations of configurations and method steps in the following detailed description are not all essential to implement the present invention in a broad sense, but are described in detail with reference numerals in the accompanying drawings. However, only representative embodiments of the present invention are disclosed.
(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. In the first embodiment, an electric hammer drill will be described as an example of a work tool. As shown in FIG. 1, the hammer drill 101 is mainly composed of a main body 103 and a handle 109. As shown in FIG. 2, a tool holder 137 is provided at the distal end region of the main body 103 (left side in FIG. 2), and the hammer bit 119 is detachably attached to the tool holder 137. The grip portion 151 of the handle 109 is provided in a rear region (right side in FIG. 2) opposite to the tip region of the main body portion 103.

[Drive mechanism]
As shown in FIGS. 2 and 3, the main body 103 is mainly configured by a motor housing 105 that houses the drive motor 111 and a gear housing 107 that houses the motion conversion mechanism 113, the striking element 115, and the power transmission mechanism 117. ing. The drive motor 111 is an implementation configuration example corresponding to the “electric motor” in the present invention.

The drive motor 111 is arranged so that the rotation axis is parallel to the long axis direction of the hammer bit 119. A cooling fan 112 is attached to the rotating shaft of the drive motor 111 in front of the drive motor 111. The rotational output of the drive motor 111 is converted into a linear motion by a motion conversion mechanism 113 disposed in front of the drive motor 111 and transmitted to the striking element 115, and the longitudinal direction of the hammer bit 119 (the horizontal direction in FIG. 2). Generate impact force. The rotation output of the drive motor 111 is decelerated by the power transmission mechanism 117 disposed in front of the drive motor 111 and transmitted to the hammer bit 119, causing the hammer bit 119 to rotate in the circumferential direction. The drive motor 111 is energized and driven by pulling a trigger 109 a disposed on the handle 109. For convenience of explanation, the hammer bit 119 side is referred to as the front side of the hammer drill 101, and the handle 109 side is referred to as the rear side of the hammer drill 101.

The motion conversion mechanism 113 is composed mainly of an intermediate shaft 125, a swing ring 129, and a cylindrical piston 131. The intermediate shaft 125 is rotated by the drive motor 111. The rocking ring 129 is rocked in the major axis direction of the hammer bit 119 via the rotating body 127 as the intermediate shaft 125 rotates. The cylindrical piston 131 is reciprocated linearly in the long axis direction of the hammer bit 119 as the swing ring 129 swings.

The power transmission mechanism 117 is mainly composed of a gear reduction mechanism composed of a plurality of gears. This gear reduction mechanism has a small diameter gear 133 that rotates integrally with the intermediate shaft 125, and a large diameter gear 135 that meshes with and engages with the small diameter gear 133. The power transmission mechanism 117 transmits the rotation of the drive motor 111 to the tool holder 137. Thereby, the tool holder 137 is rotated, and the hammer bit 119 held by the tool holder 137 is rotationally driven.

The striking element 115 is composed mainly of a striker 143 and an impact bolt 145. The striker 143 is configured as a striker that is slidably disposed in the cylindrical piston 131. The impact bolt 145 is configured as an intermediate element slidably disposed in the tool holder 137. The striker 143 is driven via an air spring (pressure fluctuation) of the air chamber 131 a accompanying the sliding of the cylindrical piston 131 and collides with the impact bolt 145. As a result, the hammer bit 119 generates a striking force.

When the drive motor 111 is energized, the rotation of the drive motor 111 is converted into a linear motion via the motion conversion mechanism 113 and then transmitted to the hammer bit 119 via the striking element 115. Thereby, the hammer bit 119 performs a hitting operation. The rotation of the drive motor 111 is transmitted to the hammer bit 119 via the power transmission mechanism 117. As a result, the hammer bit 119 rotates. That is, the hammer bit 119 performs a hammering operation on the workpiece by performing a hammering operation of the hammer bit 119 in the major axis direction and a circumferential rotation operation around the major axis direction.

[handle]
As shown in FIG. 4, the handle 109 is formed as a resin main handle for an operator to hold the hammer drill 101. The handle 109 is mainly composed of a handle rear side portion 150 and a handle front side portion 155. The handle rear side portion 150 further includes a grip portion 151 held by an operator, a cylindrical housing portion 152 disposed in front of the grip portion 151, a distal end portion (lower end portion) of the grip portion 151, and the housing portion 152. The reinforcing part 151a to be connected is mainly used. This handle 109 is an implementation configuration example corresponding to the “handle configuration unit” in the present invention.

The grip portion 151 is provided so as to extend downward from the rear end portion of the housing portion 152 intersecting the long axis direction of the hammer bit 119. A power cable for supplying electricity to the drive motor 111 is provided at the tip of the grip portion 151. The reinforcing portion 151 a connects the tip end portion of the grip portion 151 and a region ahead of the rear end portion of the housing portion 152. Thereby, the reinforcement part 151a reinforces the grip part 151, and the strength of the handle rear side part 151 is improved. The housing part 152 is provided with an engaging convex part 153 that projects forward. This grip part 151 is the implementation structural example corresponding to the "handle" in this invention. The grip portion 151 is also referred to as a main handle.

The handle front side portion 155 is mainly composed of a front cylindrical portion 156 and an extending portion 157 disposed behind the front cylindrical portion 156. The front cylindrical portion 156 is configured as an annular member that surrounds the distal end region of the gear housing 107. Further, the extending portion 157 is provided with an engaging concave portion 158 that can be engaged with the engaging convex portion 152. As shown in FIG. 9, the extending portion 157 has a substantially U-shaped cross-sectional shape with respect to a cross section orthogonal to the long axis direction of the hammer drill 119.

Further, as shown in FIG. 4, the motor housing 105 is provided with a plurality of sliding guides 106. The plurality of sliding guides 106 are arranged at a plurality of positions on the outer periphery of the motor housing 105 (drive motor 111) with respect to the circumferential direction around the major axis direction of the hammer bit 119. That is, it is provided in a region outside the drive motor 111. In addition, the sliding guide 106 is disposed at two locations on the front and rear sides with respect to the longitudinal direction of the hammer bit 119. As a result, the front sliding guide 106 and the rear sliding guide 106 have a plurality of positions (positions different from each other) on the outer periphery of the motor housing 105 (drive motor 111) in the circumferential direction around the long axis direction of the hammer bit 119. Respectively. The sliding guide 106 is formed of a metal cover that covers the resin convex portion formed on the surface of the motor housing 105. The metal cover is made of a metal such as carbon steel, aluminum, magnesium, or titanium. Furthermore, a plurality of coil springs 160 are arranged on the outer periphery of the motor housing 105.

As shown in FIGS. 5 and 6, a plurality of concave portions 154 a corresponding to the respective sliding guides 106 and a plurality of pressing portions 154 b corresponding to the respective coil springs 160 are formed on the inner peripheral surface of the housing portion 152. Has been. The recess 154a is formed as a part of the housing portion 152, and the recess 154a (housing portion 152) is formed of a resin material such as PA6 nylon. As shown in FIG. 2, a contact portion 154c that can contact the sliding guide 106 is formed at the rear end of the recess 154a. Further, a rib 156 a that can contact the front end portion of the gear housing 107 is formed at the front end portion of the front cylindrical portion 156.

As shown in FIGS. 1 to 3, the handle 109 described above is arranged with the handle rear portion 150 moved from the rear with respect to the main body 103 and the handle front portion 155 moved with respect to the main body 130 from the front. And are connected to each other by the engaging convex portion 153 and the engaging concave portion 158. Thereby, the handle 109 is assembled to the outside of the main body 103. That is, the handle 109 is disposed so that the housing portion 152 covers the motor housing 105 and the extending portion 157 is disposed along the gear housing 107. Further, as shown in FIGS. 5 and 6, the housing portion 152 is disposed outside the motor housing 105 so that the concave portion 154 a engages with the sliding guide 106 and the pressing portion 154 b presses the coil spring 160. . That is, one end (front end) of the coil spring 160 contacts the motor housing 105, and the other end (rear end) contacts the pressing portion 154b of the housing portion 152. It is supported in a state of being biased backward. The handle rear portion 150 is pressed rearward by the coil spring 160, and at this time, the rib 156 a of the front cylindrical portion 156 contacts the front end portion of the gear housing 107. Thereby, the rearward movement of the handle 109 is restricted. That is, the rear position of the handle 109 is defined. This coil spring 160 is an implementation structural example corresponding to the “elastic member” in the present invention.

The bellows member 108 is disposed between the gear housing 107 and the handle rear side portion 150. The bellows member 108 is an annular member disposed so as to surround the gear housing 107, and is formed to be extendable and contractible in the long axis direction of the hammer bit 119. Thereby, relative movement of the handle 109 with respect to the gear housing 107 is allowed with respect to the longitudinal direction of the hammer bit 119. The bellows member 108 functions as a seal member that closes the gap between the main body 103 and the handle 109.

[Dust collector attachment]
Said hammer drill 101 is comprised so that the dust collector 200 may be attached so that removal is possible. Specifically, as shown in FIGS. 1 and 2, the dust collector mounting portion formed on the hammer drill 101 mainly includes a guide groove 161, a main body side engaging portion 162, an engaging groove 163, and a female connector 164. It is configured as. The guide groove 161 and the main body side engaging portion 162 are provided in the extending portion 157 of the handle front side portion 155 of the handle 109. Further, the engaging groove 163 and the female connector 164 are provided on the reinforcing portion 151 a in the handle rear side portion 150 of the handle 109. In other words, the dust collector attachment portion is provided on the handle 109, whereby the dust collector 200 is attached to the handle 109 of the hammer drill 101. This dust collector attachment part is an implementation structural example corresponding to the "auxiliary machine mounting part" in this invention.

As shown in FIG. 1 and FIG. 9, the guide groove 161 is composed of a pair of left and right grooves formed in the lower region of the extending portion 157. The guide groove 161 extends parallel to the long axis direction of the hammer bit 119. As shown in FIGS. 1 and 2, the main body side engaging portion 162 is configured by a recess formed on the hammer bit 119 side (tip region side) with respect to the guide groove 161. Further, the engaging groove 163 and the female connector 164 are formed on the front surface (surface on the hammer bit 119 side) of the reinforcing portion 151 a of the handle 109.

[Dust collector]
Next, the dust collector 200 attached to the hammer drill 101 will be described. The dust collector 200 is also referred to as a dust collection attachment, and is configured as a portable dust collection attachment that can be carried together with the hammer drill 101 while being attached to the hammer drill 101. Therefore, the hammer drill 101 can be driven with the dust collector 200 attached, and can be driven with the dust collector 200 removed. That is, the hammer drill 101 has either a drive mode in which the dust collector 200 is attached (also referred to as a dust collector attachment mode) or a drive mode in which the dust collector 200 is not attached (also referred to as a dust collector non-attachment mode). These drive modes are selected and driven. This dust collector 200 is an implementation structural example corresponding to the "electric auxiliary machine" in this invention.

As shown in FIG. 7, the dust collector 200 is mainly configured of a main body 201, a dust collector 210, a dust transfer unit 215, and a mounting mechanism 250. The main body 201 has a main body housing 201 A that forms the outline of the dust collector 200. The main body housing 201 A houses the dust container 220 and the drive unit 230.

The dust collecting unit 210 is configured to abut on the workpiece when the hammer drill 101 is drilled. The dust collecting portion 210 has an opening 211 formed as a through hole through which the hammer bit 119 is inserted. As shown in FIG. 8, the opening 211 is disposed so as to surround the hammer bit 119 in a state where the dust collector 200 is attached to the hammer drill 101.

As shown in FIG. 7, the dust transfer unit 215 includes a first transfer unit 215a and a second transfer unit 215b. The first transfer unit 215 a is a hollow resin member and is connected to the dust collection unit 210. As shown in FIG. 8, the first transfer unit 215 a extends in a direction intersecting the major axis direction of the hammer bit 119 in a state where the dust collector 200 is mounted on the hammer drill 101. On the other hand, as shown in FIG. 7, the second transfer part 215b extends in a direction intersecting with the direction in which the first transfer part 215a extends. In other words, the second transfer part 215 b extends in parallel with the long axis direction of the hammer bit 119.

This dust transfer part 215 slides relative to the main body part 201 in the major axis direction of the hammer bit 119 by sliding relative to the extension part 218 formed in the main body part 201 together with the dust collecting part 210. . That is, in the state where the dust collector 200 is mounted on the hammer drill 101, the distance from the tip of the hammer bit 119 to the dust collector 210 is variable. In addition, a bellows-like transfer hose 216 is provided inside the second transfer part 215b, and is configured to be able to cope with the sliding of the dust transfer part 215 with respect to the extending part 218.

As shown in FIG. 7, the dust container 220 is mainly composed of a fixed part 221a and a movable part 221b. The fixing portion 221a is formed as a part of the main body housing 201A. The movable portion 221b is rotatable around a fulcrum 222 provided in the main body housing 201A. The movable portion 221b has a latch 223, and the movable portion 221b is fixed to the fixed portion 221a by the latch 223 engaging with the fixed portion 221a. The movable portion 221b accommodates the accommodating portion 225, and the transferred dust is temporarily accommodated in the accommodating portion 225. By releasing the engagement between the latch 223 and the fixed portion 221a and rotating the movable portion 221b, the storage portion 225 can be accessed, whereby the dust stored in the storage portion 225 is discarded. Note that a filter 226 is disposed in a through hole formed above the accommodating portion 225 (on the driving portion 230 side).

As shown in FIG. 7, the drive unit 230 is housed in the main body housing 201 A of the upper part of the dust container 220. The drive unit 230 is mainly composed of a dust collection motor 231, a fan 232, a male plug 233, and a controller 234. The dust collection motor 231 is configured as a direct current motor, and the rotation shaft is disposed substantially parallel to the second transfer unit 215 b of the dust transfer unit 215. A fan 232 is attached to the front side of the rotating shaft of the dust collection motor 231. The drive unit 230 communicates with the storage unit 225 through the filter 226.

A male plug 233 that protrudes rearward from the main body housing 201 A is arranged above the dust collection motor 220 on the side opposite to the dust container 220. The male plug 233 is composed of four plugs (see FIG. 10) held by the plug holder 233a. The front side of the plug holding portion 233a opposite to the male plug 233 is connected to the coil spring 233b. The coil spring 233b is further connected to the main body housing 201. Thereby, the plug holding part 233a and the male plug 233 can move in the front-rear direction (long axis direction of the hammer bit 119) via the coil spring 233b. The male plug 233 is electrically connected to the controller 234. The controller 234 is disposed on the side of the drive motor 231 and controls the drive of the dust collection motor 231.

[Mounting mechanism]
As shown in FIG. 7, the dust collector 200 includes a mounting mechanism 250 for attaching the dust collector 200 to the hammer drill 101. The mounting mechanism 250 is provided on the upper surface of the main body housing 201A on the main body housing 201, a guide rail 251 formed integrally with the main body housing 201A, an engaging convex portion 252 formed integrally with the plug holding portion 233a. The latch 253 is mainly used.

As shown in FIG. 9, the guide rail 251 is formed of a pair of convex portions facing each other. As shown in FIG. 7, the engaging convex portion 252 is formed to protrude toward the rear of the dust collector 200 in parallel with the male plug 233. The latch 253 can be rotated with respect to the main body housing 201 with the front end of the latch 253 as a fixed fulcrum, and the rear end of the latch 253 is above the main body housing 201A by a spring element (not shown) (FIG. 7). Is biased toward the upper side).

[Attaching the dust collector to the hammer drill]
Next, attachment of the dust collector 200 to the hammer drill 101 will be described. The dust collector 200 is attached to the hammer drill 101 from the front of the hammer drill 101 toward the rear of the hammer drill 101 in the major axis direction of the hammer bit 119 as shown in FIG. Specifically, the guide groove 161 provided in the hammer drill 101 and the guide rail 251 of the dust collector 200 are engaged, and the dust collector 200 is slid from the hammer bit 119 side toward the handle 109 side. And the main body side engaging part 162 of the hammer drill 101 and the latch 253 of the dust collector 200 are engaged, and the engaging groove 163 of the hammer drill 101 and the engaging convex part 252 of the dust collector 200 are engaged. That is, the dust collector 200 is engaged with the handle 109 of the hammer drill 101. Thereby, the dust collector 200 is attached to the hammer drill 101.

The dust collector 200 is attached to the hammer drill 101, and at the same time, the female connector 164 of the hammer drill 101 and the male plug 233 of the dust collector 200 are mechanically connected. Specifically, as shown in FIG. 10, the female connector 164 mainly includes a connector main body 165, a metal terminal 166, a plug insertion portion 167, an opening sealing portion 168, and a coil spring 170.

The connector main body 165 is provided with four metal terminals 166. Each metal terminal 166 is composed of a set of metal plate materials, and sandwiches the male plug 233 using the elasticity of the metal plate material. A plug insertion portion 167 is provided at the front end of the connector main body 165. The plug insertion portion 167 has an opening 167a into which the male plug 233 is inserted. The plug insertion portion 167 has four openings 167 a corresponding to the four male plugs 233. The opening sealing portion 168 is urged forward by a coil spring 170 and can move relative to the connector main body 165. When the male plug 233 is not engaged with the female connector 164, the opening sealing portion 168 is urged by the coil spring 170 to seal the opening 167a. This prevents dust and the like from entering the female connector 164.

When the male plug 233 is inserted into the female connector 164, the male plug 233 presses the opening sealing portion 168 against the biasing force of the coil spring 170 and moves the opening sealing portion 168. When the male plug 233 is inserted into the female connector 164, the opening sealing portion 168 intersects the direction in which the male plug 233 moves (substantially, the long axis direction of the hammer bit 119) ( Move diagonally backward). Thereby, as shown in FIG. 10, the male plug 233 engages with the metal terminal 166 through the second opening 168 a formed in the opening sealing portion 168. As a result, the male plug 233 and the metal terminal 166 are electrically connected.

When the dust collector 200 is attached to the hammer drill 101, power is supplied from the power cable 190 of the hammer drill 101 to the controller 234 of the dust collector 200 via the male plug 233 and the female connector 164 that are electrically connected. . In other words, the dust collector 200 attached to the handle 109 of the hammer drill 101 is supplied with power through the handle 109. Therefore, the handle 109 is not only gripped by an operator, but also functions as a component for attaching the dust collector 200 and supplying power to the dust collector 200.

[Operation of hammer drill and dust collector]
As shown in FIG. 8, when the trigger 109 a is operated by an operator, an alternating current is supplied to the hammer drill 101 from an external power source via the power cable 190 and driven. Then, the motion conversion mechanism 113, the striking element 115, and the power transmission mechanism 117 as drive mechanisms are driven by the drive motor 111, and the hammer bit 119 is driven. Thereby, the worker presses the hammer bit 119 against the workpiece and performs a predetermined processing operation (hammer drilling operation, drilling operation). During this processing operation, the dust collecting portion 210 surrounding the hammer bit 119 also contacts the workpiece together with the hammer bit 119. The hammer bit 119 enters the workpiece, but the dust collecting portion 210 remains in contact with the workpiece surface. Therefore, as the processing operation proceeds, the bellows-shaped transfer hose 216 contracts and the dust collecting portion 210 moves relative to the hammer bit 119.

In the hammer drill 101 described above, the trigger 109 a is operated to drive the drive motor 111, and at the same time, an alternating current is supplied to the dust collector 200. At this time, the controller 234 converts the alternating current supplied through the handle 109 of the hammer drill 101 into a direct current. Then, the controller 234 supplies a direct current to the dust collection motor 231 to control driving of the dust collection motor 231. Thereby, the controller 234 controls the rotation of the fan 232.

When the fan 232 is rotated, air is sucked from the opening 211 of the dust collecting unit 210. The sucked air passes through the transfer hose 216, the accommodating portion 225, the filter 226, and the dust collection motor 231, reaches the fan 232, and from an exhaust port (not shown) formed in the main body housing 201 A of the dust collector 200. Discharged. Due to this air flow, dust generated during processing of the workpiece by the hammer bit 119 is sucked from the opening 211 of the dust collecting unit 210 and transferred to the storage unit 225. Then, when the sucked air passes through the filter 226, dust is captured by the filter 226 and accumulated in the housing portion 225. Further, the controller 243 and the drive motor 231 are cooled by the air flow.

During the machining operation by the hammer drill 101, vibration in the major axis direction of the hammer bit 119 is mainly generated in the main body 103. On the other hand, since the handle 109 can be rela- tive to the main body 103 in the longitudinal direction of the hammer bit 119, the handle 109 is urged by the coil spring 160 in response to vibrations generated during processing operations. It moves in the long axis direction of the bit 119.

Specifically, as shown in FIGS. 8 and 11, the main body 103 and the handle 109 move relative to each other with respect to the longitudinal direction of the hammer bit 119. FIG. 8 shows the hammer drill 101 in which the handle 109 is positioned rearward relative to the main body 103. FIG. 11 shows the hammer drill 101 in which the handle 109 is positioned relatively forward with respect to the main body 103.

As shown in FIG. 8, the handle 109 has a main body portion 103 and a housing portion that are urged rearwardly by a coil spring 160 (see FIGS. 5 and 6) and the rib 156 a abuts the front end portion of the gear housing 107. 152 is arranged at a rear position separated by a distance D. That is, the bellows member 108 is held between the main body 103 and the housing 152 with a length D. At this time, since the dust collector 200 is attached to the handle 109, the dust collector 200 is located at the rear position together with the handle 109.

On the other hand, as shown in FIG. 11, the handle 109 is placed in the forward position against the biasing force of the coil spring 160 in a state where the handle 109 is biased by the coil spring 160 due to vibration generated during the machining operation. In this front position, the main body 103 and the housing 152 are held at a distance D1 shorter than the distance D by the contact between the contact portion 154c and the rear end portion of the sliding guide 106. That is, the bellows member 108 is held between the main body 103 and the housing 152 with a length D1. At this time, the dust collector 200 is located at the front position together with the handle 109.

According to the first embodiment described above, the dust collector 200 is attached to the handle 109. As a result, the dust collector 200 moves relative to the main body 103 together with the handle 109 during the processing operation. In other words, the dust collector 200 does not move relative to the handle 109. Therefore, even when the handle 109 and the dust collector 200 slide with respect to the main body 103, the engagement between the male plug 233 and the female connector 164 is stably maintained. Thereby, the occurrence of chattering between the male plug 233 and the metal terminal 166 is suppressed.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. In 2nd Embodiment, although the dust collector 200 is the same shape as 1st Embodiment, the structures of the handle 109 and the dust collector attachment part differ among the hammer drills 101 mainly. The components other than the dust collector attachment portion of the hammer drill 101 are the same as those in the first embodiment, and the same reference numerals as those in the first embodiment are attached and the description thereof is omitted.

In the second embodiment, as shown in FIG. 12, the extending portion 157 A of the handle front side member 155 A of the handle 109 is formed so as to expose the lower region of the gear housing 107.

12 and 13, a guide groove 161 and a main body side engaging portion 162 are formed in the lower region of the gear housing 107. Therefore, in the second embodiment, the dust collector attaching portion is constituted by the guide groove 161 and the main body side engaging portion 162 provided in the gear housing 107, and the engaging groove 163 and the female connector 164 provided in the handle 109. Composed. In other words, the dust collector 200 is attached to the gear housing 107 and the handle 109 of the main body 103. This dust collector attachment part is an implementation structural example corresponding to the "auxiliary machine mounting part" in this invention.

The dust collector 200 is fixedly attached to the gear housing 107 (main body 103) by the engagement of the main body side engaging portion 162 and the latch 253. On the other hand, in the dust collector 200, the male plug 233 and the engaging projection 252 are engaged with a handle 109 that can move relative to the gear housing 107. Therefore, in order to correspond to the relative movement of the handle 109, the plug holding part 233a to which the male plug 233 and the engaging convex part 252 are coupled is configured to be relatively movable with respect to the main body part 201 of the dust collector 200. ing.

Specifically, the plug holding part 233a is connected to the main body part 201 via a coil spring 233b. The coil spring 233b is disposed so as to expand and contract in parallel with the long axis direction of the hammer bit 119. Accordingly, the plug holding portion 233a is allowed to move relative to the main body portion 201.

During the machining operation, when the handle 109 moves from the rear position shown in FIG. 13 to the front position shown in FIG. 14 with respect to the main body 103 of the hammer drill 101, the male plug 233 moves together with the handle 109 to the front position. That is, since the main body 201 of the dust collector 200 is fixedly attached to the gear housing 107 of the hammer drill 101, the male plug 233 (plug holding portion 233 a) is connected to the main body 201 of the dust collector 200. Move relative. On the other hand, when the handle 109 moves from the front position shown in FIG. 14 to the rear position shown in FIG. 13, the male plug 233 is urged by the coil spring 233 b and moves to the rear position together with the handle 109.

According to the second embodiment described above, since the male plug 233 can move relative to the main body 201 of the dust collector 200, the male plug 233 is engaged with the female connector 164 in the male connector 164. The distance between the mold plug 233 and the metal terminal of the female connector 164 (see FIG. 10 of the first embodiment) is kept constant. That is, even when the hammer drill 101 is vibrated by the machining operation and the handle 109 moves relative to the main body 103, the distance between the male terminal of the male plug 233 and the female connector 164 is always maintained constant. The Thereby, chattering between the male plug 233 and the metal terminal is prevented.

Further, according to the first and second embodiments described above, the dust collector 200 is held by the handle 109. That is, the mass on the handle 109 side increases, and a large amount of kinetic energy is required to vibrate the handle 109. Therefore, the vibration of the handle 109 to which the dust collector 200 is attached is reduced.

Further, according to the first and second embodiments, the handle 109 is urged by the coil spring 160 due to the vibration in the major axis direction of the hammer bit 119 generated during the work, and is moved between the front position and the rear position. Moving. For this reason, the expansion and contraction of the coil spring 160 absorbs the kinetic energy resulting from the vibration of the main body 103 and reduces the transmission of vibration from the main body 103 to the handle 109. When the handle 109 slides with respect to the main body 103, the slide guide 106 guides the handle 109 in the long axis direction of the hammer bit 119. Therefore, in the hammer drill 101 in which vibration mainly occurs in the major axis direction of the hammer bit 119, the main direction of vibration and the moving direction of the handle 109 are substantially coincident, so that vibration transmission to the handle 109 is effectively suppressed.

Further, according to the first and second embodiments, since the drive motor 111 is accommodated in the motor housing 105 of the main body 103, the drive motor 111 does not move relative to the motion conversion mechanism 113 or the power transmission mechanism 117. . Therefore, it is not necessary to provide a special transmission member for transmitting the power of the drive motor 111 to the motion conversion mechanism 113 or the power transmission mechanism 117.

In the first and second embodiments described above, the hammer drill 101 is provided with a mode switch (not shown) for switching the work mode, and the operator operates the mode switch 110 to operate You may be comprised so that the hammer drill mode and drill mode as modes may be switched. In the hammer drill mode, the hammer bit 119 performs a striking operation and a rotating operation. In the drill mode, the hammer bit 119 performs only the rotation operation.

In the first and second embodiments described above, the coil spring 160 is provided as the biasing member disposed between the motor housing 105 and the handle 109. However, other types of springs, rubber, or the like may be provided. Good. Alternatively, the sliding guide 160 may be formed of resin, and the recess 154a may be formed of metal. Further, the working tool is not limited to the hammer drill 101, and the present invention may be applied to a hammer or a reciprocating saw as long as it is a working tool that mainly generates vibration in the major axis direction of the tip tool. Further, the electric auxiliary machine is not limited to the dust collector 200, and may be a lighting device, a display, or the like.

In view of the gist of the present invention, the following modes can be configured for the work tool according to the present invention. Each aspect is used not only alone or in combination with each other, but also in combination with the invention described in the claims.
(Aspect 1)
The accessory holding part has a guide part extending in the longitudinal direction of the tip tool and / or an engaging part engaging with the accessory main part.
(Aspect 2)
By moving the electric auxiliary machine in the long axis direction of the tip tool with respect to the work tool, the auxiliary machine main body engages with the work tool auxiliary machine holding part, and the auxiliary machine side terminal serves as the work tool. Connected to the side terminal.
(Aspect 3)
The biasing member biases the accessory side terminal in the long axis direction of the tip tool.
(Aspect 4)
The direction in which the accessory side terminal moves relative to the accessory main body coincides with the direction in which the accessory moves relative to the work tool when the accessory is attached to the work tool.

(Correspondence between each component of this embodiment and each component of the present invention)
The correspondence between each component of the present embodiment and each component of the present invention is shown as follows. In addition, this embodiment shows an example of the form for implementing this invention, and this invention is not limited to the structure of this embodiment.
The hammer drill 101 is an example of a configuration corresponding to the “work tool” of the present invention.
The drive motor 111 is an example of a configuration corresponding to the “electric motor” of the present invention.
The main body 103 is an example of a configuration corresponding to the “tool main body” of the present invention.
The motor housing 105 is an example of a configuration corresponding to the “tool body” of the present invention.
The gear housing 107 is an example of a configuration corresponding to the “tool body” of the present invention.
The handle 109 is an example of a configuration corresponding to the “handle component” of the present invention.
The grip portion 151 is an example of a configuration corresponding to the “handle” of the present invention.
The coil spring 160 is an example of a configuration corresponding to the “elastic member” of the present invention.
The guide groove 161 is an example of a configuration corresponding to the “auxiliary machine mounting portion” of the present invention.
The main body side engaging portion 162 is an example of a configuration corresponding to the “auxiliary device mounting portion” of the present invention.
The engagement groove 163 is an example of a configuration corresponding to the “auxiliary machine mounting portion” of the present invention.
The female connector 164 is an example of a configuration corresponding to the “auxiliary machine mounting portion” of the present invention.
The main body side engaging portion 162 is an example of a configuration corresponding to the “auxiliary device holding portion” of the present invention.
The female connector 164 is an example of a configuration corresponding to the “work tool side terminal” of the present invention.
The dust collector 200 is an example of a configuration corresponding to the “electric auxiliary machine” of the present invention.
The male plug 233 is an example of a configuration corresponding to the “auxiliary machine side terminal” of the present invention.
The plug holding portion 233a is an example of a configuration corresponding to the “terminal holding portion” of the present invention.
The coil spring 233b is an example of a configuration corresponding to the “biasing member” of the present invention.

DESCRIPTION OF SYMBOLS 101 Hammer drill 103 Main body part 105 Motor housing 106 Sliding guide 107 Gear housing 108 Bellows member 109 Handle 109a Trigger 110 Mode changeover switch 111 Drive motor 112 Cooling fan 113 Motion conversion mechanism 115 Stroke element 117 Power transmission mechanism 119 Hammer bit 125 Intermediate shaft 127 Rotating body 129 Oscillating ring 131 Cylindrical piston 131a Air chamber 133 Small diameter gear 135 Large diameter gear 137 Tool holder 143 Strike 145 Impact bolt 150 Handle rear part 151 Grip part 151a Reinforcement part 152 Housing part 153 Engaging convex part 154a Concave part 154b Press part 154c Contact part 155 Handle front side part 155A Handle front side member 156 Front side cylindrical part 156a Rib 157 Extension part 157A Extension part 158 Engaging recess 161 Guide groove 162 Main body side engaging portion 163 Engaging groove 164 Female connector 165 Connector main body 166 Metal terminal 167 Plug insertion portion 167a Opening portion 168 Opening sealing portion 168a Second opening portion 170 Coil spring 200 Dust collector 201 Main body portion 201A Main body housing 210 Dust collecting portion 211 Opening portion 215 Dust transfer portion 215a First transfer portion 215b Second transfer portion 216 Transfer hose 218 Extension portion 220 Dust storage portion 221a Fixed portion 221b Movable portion 222 Support point 223 Latch 225 Part 226 filter 230 driving part 231 dust collecting motor 232 fan 233 male plug 233a plug holding part 233b coil spring 234 controller 250 mounting mechanism 251 guide rail 252 engaging convex part 253 latch

Claims

An electric auxiliary machine is mounted so that it can be carried in one piece, and is a work tool that drives a tip tool in the long axis direction of the tip tool to perform a machining operation,
An electric motor having a motor shaft arranged in parallel to the long axis direction;
A tool body that houses the electric motor, and the tip tool is mounted in a tip region;
A handle component having a handle to be gripped by an operator;
An elastic member disposed between the tool body and the handle component;
An auxiliary machine mounting portion on which the electric auxiliary machine is detachably mounted, and
The handle component part moves relative to the tool body in a state where the elastic force of the elastic member is applied, and suppresses vibration transmitted from the tool body to the handle component part during the machining operation. A work tool characterized by being configured as described above.
The work tool according to claim 1,
The auxiliary equipment mounting portion is provided in the handle component portion, and includes a work tool side terminal that can be electrically connected to an auxiliary equipment side terminal of the electric auxiliary equipment,
A work tool configured to supply power from the work tool to the electric auxiliary machine by connecting the auxiliary machine side terminal and the work tool side terminal.
The work tool according to claim 2,
A work tool configured such that a distance between the auxiliary machine side terminal and the work tool side terminal is always kept constant in a state where the electric auxiliary machine is mounted on the work tool. .
The work tool according to any one of claims 1 to 3,
The auxiliary equipment mounting portion includes an auxiliary equipment holding portion that mechanically engages with an auxiliary equipment main body portion of the electric auxiliary equipment and holds the auxiliary equipment main body portion in a fixed state,
The auxiliary machine holding part is provided in the tool body,
The electric auxiliary machine is configured to move in the longitudinal direction of the tip tool with respect to the tool body and engage with the auxiliary machine holding part,
The work tool characterized in that the handle component is configured to be movable relative to the tool body in the long axis direction of the tip tool.
The work tool according to any one of claims 1 to 3,
The auxiliary equipment mounting portion has an auxiliary equipment holding portion that mechanically engages with an auxiliary equipment main body portion of the electric auxiliary equipment and holds the auxiliary equipment main body portion in a fixed state,
The auxiliary machine holding part is provided in the handle component part,
The said handle structure part is comprised so that relative movement with respect to the said tool main body is possible with the said electric auxiliary machine.
The work tool according to any one of claims 1 to 5,
The work tool includes a removable electric auxiliary machine,
The electric auxiliary machine has an auxiliary machine body and an auxiliary machine side terminal,
The auxiliary machine side terminal is configured to be relatively movable with respect to the auxiliary machine main body.
The work tool according to claim 6,
The electric auxiliary machine includes an urging member disposed between the auxiliary machine side terminal and the auxiliary machine main body,
The biasing member is configured to bias the accessory side terminal toward the work tool in a state where the electric auxiliary machine is mounted on the work tool.
The auxiliary tool side terminal is configured to be relatively movable with respect to the auxiliary device main body in a state in which a biasing force of the biasing member is applied.
The work tool according to claim 6 or 7,
The electric auxiliary machine includes a terminal holding unit that holds the auxiliary machine side terminal,
The work tool characterized in that the terminal holding part is configured to be movable relative to the auxiliary machine main body together with the auxiliary machine side terminal.