WO2014171489A1

WO2014171489A1 - Impact tool

Info

Publication number: WO2014171489A1
Application number: PCT/JP2014/060835
Authority: WO
Inventors: 真司小野田; 聖展吉兼; 正規古澤
Original assignee: 株式会社マキタ
Priority date: 2013-04-17
Filing date: 2014-04-16
Publication date: 2014-10-23
Also published as: JP2014210298A; JP6006159B2; DE112014002011T5

Abstract

[Problem] The present invention provides an impact tool improved in terms of a battery mounting technique. [Solution] An impact tool provided with a motor (110), a tool body (101), a handle (109), and a battery mounting unit (160A). The motor (110) drives a tool bit (119). A battery (170A) is detachably mounted in the battery mounting unit (160A). The handle (109) extends in a handle extension direction intersecting a major axis direction. The battery mounting unit (160A) comprises a battery engaging unit (161) with which the battery (170A) can engage. The battery (170A) is mounted in the battery mounting unit (160A) by being slid in an intersecting direction that intersects the battery engaging unit (161) in both directions of the major axis direction of the tool bit (119) and the extension direction of the handle (109).

Description

Impact tool

The present invention relates to an impact tool in which a tool bit moves linearly at least in the long axis direction to perform a predetermined machining operation on a workpiece.

Japanese Patent Application Laid-Open No. 2010-5751 discloses a battery type hammer drill using a battery as a drive source. In this battery type hammer drill, a battery mounting portion is provided on the lower surface of a downward extending portion connecting the tool body and the handle. A battery is inserted and attached to the battery mounting portion from the rear of the hammer drill to the front.

Generally, a hammer drill is a hammering tool that performs hammering work by hitting a tool bit in the long axis direction. Therefore, during hammering, shocking and periodic vibrations occur in the long axis direction of the tool bit, that is, in the longitudinal direction of the hammer drill.

In the hammer drill described in Japanese Patent Application Laid-Open No. 2010-5751, since the battery is inserted and mounted from the rear of the hammer drill, there is a possibility that the battery may come off due to vibrations in the longitudinal direction of the hammer drill.

Therefore, the present invention has been made in view of the above, and an object thereof is to provide an impact tool improved with regard to a battery mounting technique.

The above problem is solved by the present invention. According to a preferred embodiment of the impact tool according to the present invention, an impact tool is configured that moves at least linearly on an impact shaft in which a tool bit extends in a predetermined major axis direction. The impact tool includes a motor for driving a tool bit, a tool main body that houses the motor, a handle that is connected to the tool main body, and a mounting portion that removably mounts a battery for supplying current to the motor. Have The handle is provided so as to extend in a handle extending direction that intersects the longitudinal direction. The mounting portion has a battery engaging portion with which the battery can be engaged, and holds the battery when the battery engages with the battery engaging portion. Then, the battery slides with respect to the battery engaging portion in the intersecting direction intersecting both the major axis direction and the handle extending direction, so that the battery is mounted on the mounting portion.

The striking tool is a tool that performs a predetermined machining operation by moving the tool bit linearly on a striking shaft extending in the long axis direction, and vibration is generated in the long axis direction during the machining operation. According to the present invention, the battery is mounted on the mounting portion by moving in the intersecting direction intersecting both the major axis direction and the handle extending direction. Therefore, the moving direction (battery removal direction) in which the battery moves with respect to the battery mounting portion intersects the vibration direction. As a result, the possibility of the battery falling off from the mounting portion due to vibration during processing is reduced.

According to the further form of the striking tool according to the present invention, the center of gravity of the battery mounted on the mounting portion is positioned on a plane including the striking shaft and the handle central axis extending in the handle extending direction. A mounting portion is configured.
According to this aspect, when the major axis direction is the front-rear direction, it is possible to balance the weight of the battery with respect to the intersecting direction (also referred to as the left-right direction) intersecting with the front-rear direction. Thereby, the operativity of an impact tool is improved.

According to the further form of the impact tool which concerns on this invention, the mounting part has a some battery mounting part to which a some battery is each detachably mounted | worn. And the some battery mounting part is provided along with the major axis direction. Here, the plurality of batteries mounted on the mounting unit may be the same type (size, shape, capacity, etc.) or different types of batteries. Moreover, the number of battery mounting parts is not limited as long as there are two or more battery mounting parts. Furthermore, the motor may be driven using one of a plurality of batteries, or the motor may be driven using two or more batteries.
According to this aspect, since the plurality of battery mounting portions are provided side by side in the major axis direction, a plurality of batteries can be arranged in a compact manner. Furthermore, the wiring (arrangement) of the electrical wiring relating to the battery mounting portion is simplified.

According to the further form of the impact tool which concerns on this invention, it has a partition provided between the at least 2 battery mounting parts of the some battery mounting parts, and extended in a handle extending direction. And when the handle extending direction is defined as the vertical direction, the lower end surface of the partition wall and the lower end surface of the tool body are set to be flush with each other.
According to this aspect, the partition wall is used as a stand when the impact tool is placed on the ground or the like. As a result, the striking tool is stably placed.

According to the further form of the impact tool which concerns on this invention, a mounting part contains the even number of battery mounting part to which an even number of batteries are each mounted | worn so that removal is possible. The battery is mounted on the battery mounting portion which is half of the even number of battery mounting portions by sliding the battery in one direction with respect to the battery engaging portion. On the other hand, the battery is mounted on the remaining half of the even number of battery mounting portions by sliding the battery with respect to the battery engaging portion in a direction opposite to the one direction. The Of the plurality of battery mounting parts provided in the impact tool, it is only necessary that an even number of battery mounting parts satisfy the above-described configuration with respect to battery mounting, and the battery mounting part is not limited to an even number. . That is, a configuration including an even number of battery mounting portions and a configuration including an odd number of battery mounting portions are suitably included.
According to this aspect, in the state where the batteries are respectively mounted on the even number of battery mounting portions, the position of the combined center of gravity of the even number of batteries is an even number of batteries with respect to the direction in which the battery is moved relative to the battery mounting portion. Set to the center area of the battery. In particular, when the position of the combined center of gravity of the even number of batteries is located on a plane including the tool bit striking axis and the central axis extending in the handle extending direction of the handle, the left and right direction intersecting the major axis direction Naturally, the weight balance can be taken. Therefore, it is not necessary to adjust the position of the combined center of gravity of an even number of batteries.

According to the further form of the impact tool which concerns on this invention, a mounting part contains the even number of battery mounting part in which an even number of batteries are each mounted | worn so that attachment or detachment is possible. Each battery mounting part is mounted by moving the battery from the opposite direction to the battery mounting parts adjacent to each other. In this embodiment, among the battery mounting parts provided in the impact tool, it is only necessary that an even number of battery mounting parts satisfy the above-described configuration with respect to battery mounting, and the battery mounting part is limited to an even number. is not. That is, a configuration including an even number of battery mounting portions and a configuration including an odd number of battery mounting portions are suitably included.
According to this aspect, in the state where the batteries are respectively mounted on the even number of battery mounting portions, the position of the combined center of gravity of the even number of batteries is an even number of batteries with respect to the direction in which the battery is moved relative to the battery mounting portion. Set to the center area of the battery. In particular, when the position of the combined center of gravity of the even number of batteries is located on a plane including the tool bit striking axis and the central axis extending in the handle extending direction of the handle, the left and right direction intersecting the major axis direction Naturally, the weight balance can be taken. Therefore, it is not necessary to adjust the position of the combined center of gravity of an even number of batteries.

According to the further form of the striking tool according to the present invention, the combined center of gravity of the plurality of batteries mounted on the plurality of battery mounting portions is located on a plane including the striking shaft and the handle central axis extending in the handle extending direction. Thus, a plurality of battery mounting portions are configured.
According to this aspect, it is possible to balance the weight of the plurality of batteries with respect to the left-right direction intersecting the front-rear direction with the major axis direction as the front-rear direction. Thereby, the operativity of an impact tool improves.

According to the further form of the impact tool which concerns on this invention, the motor is provided so that the rotating shaft of the said motor may cross | intersect an impact axis.
According to this aspect, a striking tool of a type in which the rotating shaft of the motor intersects the striking shaft is configured.

According to the present invention, an improved impact tool is provided with respect to battery mounting technology.
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 partial sectional view showing the whole hammer drill composition concerning a 1st embodiment of the present invention. It is an enlarged view which shows the mounting state of the battery pack attached to the battery mounting part. It is A arrow directional view of FIG. 1, and a battery pack is shown with a dashed-two dotted line. It is a partial cross section figure which is B arrow view of FIG. It is a figure which shows the terminal of a battery mounting part. It is a perspective view which shows a battery pack. It is a top view which shows a battery pack. It is C arrow line view of FIG. It is a D arrow line view of FIG. It is a partial cross section figure showing the whole hammer drill composition concerning a 2nd embodiment of the present invention. It is E arrow line view of FIG. It is the partial cross section seen from the back (left side of FIG. 10) of FIG. It is a partial cross section figure showing the whole hammer drill composition concerning a 3rd embodiment of the present invention. FIG. 14 is a partial cross-sectional view seen from the rear of FIG. 13 (right side of FIG. 13). It is a schematic diagram which shows the hammer drill which concerns on 4th Embodiment.

The configurations and methods according to the above and the following description are separately or separately from other configurations and methods in order to realize the manufacture and use of the “blow tool” according to the present invention and the use of the components of the “blow 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 of the present invention)
A first embodiment of the present invention will be described below with reference to FIGS. 1st Embodiment demonstrates using a battery-type hammer drill as an example of a striking tool. As shown in FIG. 1, a battery-type hammer drill 100 has a hammer bit 119 attached thereto, and the attached hammer bit 119 is struck in the major axis direction and rotated around the major axis direction to apply to the workpiece. It is a striking tool that performs drilling and chipping. This hammer bit 119 is an implementation configuration example corresponding to the “tool bit” in the present invention.

The hammer drill 100 is configured mainly by a main body 101 that forms an outer shell of the hammer drill 100 when viewed generally. A hammer bit 119 is detachably attached to the distal end region of the main body 101 via a cylindrical tool holder 159. The hammer bit 119 is inserted into the bit insertion hole of the tool holder 159 and can be relatively reciprocated in the major axis direction, and is held in a state in which relative rotation in the circumferential direction is restricted. Is done.

The main body 101 mainly includes a motor housing 103 that houses the electric motor 110, a motion conversion mechanism 120, a striking element 140, and a gear housing 105 that houses the power transmission mechanism 150. A hand grip 109 gripped by an operator is connected to the opposite side of the main body 101 from the hammer bit 119 with respect to the longitudinal direction of the hammer bit 119. The main body 101 corresponds to the “tool main body” in the present invention, and the hand grip 109 is an implementation configuration example corresponding to the “handle” in the present invention.

In the first embodiment, for the sake of convenience, the hammer bit 119 side is defined as the “front side” and the handgrip 109 side is defined as the “rear side” with respect to the major axis direction of the hammer bit 119, that is, the major axis direction of the main body 101. Stipulate. 1 is defined as “upper side” and the lower side of FIG. 1 is defined as “lower side”.

The main body 101 has a configuration in which the gear housing 105 is disposed in the front and the motor housing 103 is disposed in the rear in the long axis direction of the hammer bit 119. The hand grip 109 is arranged behind the motor housing 103. The motor housing 103 extends downward from the lower surface of the gear housing 105, and the electric motor 110 is disposed in the extended region. The electric motor 110 is arranged such that the rotation shaft of the electric motor 110 extends in an inclined manner in the vertical direction, and intersects the striking shaft extending in the major axis direction of the hammer bit 119. This electric motor 110 is an implementation configuration example corresponding to the “motor” in the present invention.

That is, the hammer drill 100 of the present embodiment has a configuration in which the hammering shaft of the hammer bit 119 and the rotating shaft of the electric motor 110 intersect. Note that each of the motor housing 103, the gear housing 105, and the handgrip 109 constituting the main body 101 is configured by joining left and right housing members vertically divided in the major axis direction of the hammer bit 119.

The rotation output of the electric motor 110 is converted into a linear motion by the motion converting mechanism 120 and then transmitted to the striking element 140, and the hammer bit 119 passes through the striking element 140 in the major axis direction (the left-right direction in FIG. 1). Generates an impact force. The rotation output of the electric motor 110 is transmitted to the hammer bit 119 after being decelerated by the power transmission mechanism 150, and the hammer bit 119 is rotated in the circumferential direction. The electric motor 110 is energized and driven by a pulling operation of a trigger 109 a disposed on the hand grip 109.

The motion conversion mechanism 120 is disposed above the motor shaft 111 of the electric motor 110 and is a mechanism that converts the rotational output of the motor shaft 111 into a linear motion in the longitudinal direction of the hammer drill 100. The motion conversion mechanism 120 swings in the front-rear direction of the hammer drill 100 as the intermediate shaft 121 rotated by the motor shaft 111, the rotating body 123 attached to the intermediate shaft 121, and the rotation of the intermediate shaft 121 (rotating body 123). The main component is a swing member 125 that is moved, a cylindrical piston 127 as a driving body that reciprocates in the front-rear direction of the hammer drill 100 in accordance with the swing operation of the swing member 125, and a cylinder 129 that houses the piston 127. It is configured. The motor shaft 111 is disposed to be inclined with respect to the intermediate shaft 121. The cylinder 129 is integrally formed with the tool holder 159 as a rear region of the tool holder 159.

The striking element 140 is disposed above the motion conversion mechanism 120 and behind the tool holder 159, and is linear in the longitudinal direction of the hammer drill 100 converted from the rotational output of the electric motor 110 by the motion conversion mechanism 120. Is transmitted to the hammer bit 119 as a striking force. That is, the striking element 140 is mainly configured by a striker 143 as a striking element slidably disposed in the cylindrical piston 127 and an impact bolt 145 disposed in front of the striker 143 and colliding with the striker 143. ing. The space of the piston 127 behind the striker 143 forms an air chamber 127a that transmits the sliding motion of the piston 127 to the striker 143 via air pressure fluctuation.

The power transmission mechanism 150 is disposed on the front side of the motion conversion mechanism 120 and is a mechanism for transmitting the rotation output of the electric motor 110 transmitted from the intermediate shaft 121 of the motion conversion mechanism 120 to the tool holder 159. That is, the power transmission mechanism 150 is engaged with and engaged with the first gear 151 that rotates with the intermediate shaft 121 and the first gear 151, and a plurality of second gears 153 and the like attached to the tool holder 159 (cylinder 129). It is mainly composed of a gear reduction mechanism composed of these gears.

The handgrip 109 is mainly composed of a grip portion 109A extending in the vertical direction intersecting the long axis direction of the hammer bit 119, that is, the extending direction of the striking shaft on the same plane. The above vertical direction is an implementation configuration example corresponding to the “handle extending direction” in the present invention. The grip portion 109 A is arranged at a predetermined interval with respect to the upper portion of the motor housing 103, and the upper portion thereof extends upwardly from the rear end upper portion of the motor housing 103 in a substantially horizontal manner. The lower part is connected by a lower connecting part 103b that extends in a generally horizontal direction from substantially the middle in the vertical direction of the motor housing 103 to the rear. In the first embodiment, as shown in FIG. 1, the upper connecting portion 103a and the lower connecting portion 103b extend integrally from the motor housing 103 and are connected to the grip portion 109A. And may be connected to the motor housing 103.

The lower connecting portion 103b of the motor housing 103 extends rearward from a substantially central portion in the vertical direction of the motor housing 103, and a mounting portion 160 for mounting the battery pack is provided on the lower surface portion thereof. This mounting portion 160 is an implementation configuration example corresponding to the “mounting portion” in the present invention. The mounting portion 160 includes two

battery mounting portions

160A and 160B, and is arranged side by side in the major axis direction of the hammer bit 119. These two

battery mounting portions

160A and 160B are provided in a state of being fixed to the lower connecting portion 103b so that they cannot be removed from the hammer drill 100. The battery packs 170A and 170B for supplying a driving current to the electric motor 110 are detachably mounted on the two

battery mounting portions

160A and 160B, respectively. The two

battery mounting portions

160A and 160B correspond to the “plurality of battery mounting portions” in the present invention, and the battery packs 170A and 170B correspond to “batteries” in the present invention.

6 to 9 show the details of the battery packs 170A and 170B (one battery pack is shown in the figure). As illustrated, the battery packs 170 A and 170 B are configured mainly by a substantially rectangular battery case 171 and a plurality of battery cells (not shown) accommodated in the battery case 171. The battery packs 170A and 170B are arranged in the left-right direction that intersects both the major axis direction of the hammer bit 119 and the extending direction of the handgrip 109 along the lower surface of each

battery mounting portion

160A and 160B, that is, one side. The

battery mounting portions

160A and 160B are detachably mounted by a slide method that moves horizontally from one side to the other side. The two

battery packs

170A and 170B have the same configuration and can be mounted on either of the two

battery mounting portions

160A and 160B.

In order to attach and detach the battery packs 170A and 170B to / from the

battery mounting portions

160A and 160B, a pair of mounting guides 173 extending linearly along both side surfaces in the longitudinal direction are provided on the upper surface side of the battery case 171. A lock hook 175 and a lock release push button 177 are provided at the center of the upper surface side of the battery case 171. The locking hook 175 is provided near the rear in the mounting direction of the battery packs 170A and 170B, and is biased by a spring (not shown) so as to protrude from the upper surface of the battery case 171. The unlocking push button 177 is arranged on the rear side in the mounting direction of the battery case 171. When the push button 177 is pushed in, the hook 175 moves in the direction in which the hook 175 is retracted from the upper surface of the battery case 171. Connected.

On the other hand, each of the two front and rear

battery mounting portions

160A and 160B includes a pair of front and rear guide rails 161 extending linearly in the left-right direction intersecting the long axis direction of the hammer bit 119, as shown in FIGS. ing. The guide rail 161 is integrally formed with the lower connecting portion 103b. The guide rail 161 has a substantially U-shaped cross section in the lateral direction, and one end in the extending direction is opened as an insertion port for the mounting guide 173. The mounting guide 173 of the battery packs 170A and 170B is the long axis of the hammer bit 119. It is inserted by sliding in a direction that intersects both the direction and the direction in which the handgrip 109 extends. That is, the guide rail 161 functions as a guide means when the battery packs 170A and 170B are attached to the

battery mounting portions

160A and 160B, and a means for preventing the battery packs 170A and 170B from being detached from the

battery mounting portions

160A and 160B. This guide rail 161 is an implementation configuration example corresponding to the “battery engaging portion” in the present invention.

Further, as shown in FIG. 4, each of the

battery mounting portions

160A and 160B includes a concave locking portion 163 to which the hooks 175 of the battery packs 170A and 170B can be locked. The locking portion 163 is provided integrally with the lower connecting portion 103b so as to be positioned on the battery pack insertion port side between the front and rear guide rails 161, and the battery packs 170A and 170B are mounted on the

battery mounting portions

160A and 160B. When it is done, it locks with a locking hook 175 as shown in FIG. As a result, the battery packs 170A and 170B are fixed to the

battery mounting portions

160A and 160B and are restricted from moving in the direction of removal, that is, falling off. When the battery packs 170A and 170B are mounted on the

battery mounting portions

160A and 160B, the hook 175 is moved downward by being pushed by the locking portion 163 and then returned to the initial position. By doing so, it is configured to be locked to the locking portion 163.

The battery packs 170A and 170B attached to the

battery attachment portions

160A and 160B are placed in a state in which their outer surfaces are exposed except for the upper surface which is the attachment surface for the

battery attachment portions

160A and 160B. The lower surface is set so as to be flush with the lower surface of the motor housing 103. As a result, the hammer drill 100 can be stably placed on the ground or floor surface with the lower surfaces of the battery packs 170A and 170B and the motor housing 103 as placement surfaces.

Thus, the battery packs 170A and 170B are located behind the electric motor 110 and below the handgrip 109 so that the longitudinal direction of the battery packs 170A and 170B is the long axis direction of the hammer bit 119 and the extension of the handgrip 109. They are arranged side by side in the front-rear direction so as to be a crossing direction that intersects both directions of the current direction. That is, the battery packs 170A and 170B are arranged such that the length of the hammer bit 119 in the major axis direction is shorter than the length in the direction intersecting the major axis direction.

In the first embodiment, the front and rear

battery mounting portions

160A and 160B are moved (sliding) from the left side to the right side of the battery packs 170A and 170B (see FIGS. 3 and 4) when the hammer drill 100 is viewed from the rear. The direction indicated by arrow F) is defined as the mounting direction, and the movement in the opposite direction is defined as the removal direction. That is, in the first embodiment, the battery packs 170A and 170B are mounted on the two front and rear

battery mounting portions

160A and 160B by moving in the same direction.

Further, in the two front and rear

battery mounting portions

160A and 160B, when the

batteries

170A and 170B are mounted, the respective centers of gravity of the

batteries

170A and 170B include the hammer axis of the hammer bit 119 and the central axis of the handgrip 109. It is comprised so that it may be located on a plane.

Moreover, each

battery mounting part

160A, 160B is provided with the terminal 165 (refer FIG. 5). The terminal 165 is fixed to the lower surface of the lower connecting portion 103b between the front and rear guide rails 161. When the battery packs 170A and 170B are mounted on the

battery mounting portions

160A and 160B, the terminals 179 of the battery packs 170A and 170B are connected. (See FIGS. 6 and 7). As a result, current can be supplied from the battery packs 170A and 170B to the electric motor 110 and the controller (not shown).

Further, as shown in FIG. 3, four cylindrical rubber pins 167 are arranged on the lower surface of each

battery mounting portion

160A, 160B so as to be positioned at each corner of the virtual rectangle. These four rubber pins 167 protrude downward with a predetermined length, and are elastically attached downward to the four upper surfaces of the battery packs 170A and 170B attached to the

battery attachment portions

160A and 160B. To force. Thereby, rattling due to vibration of the battery packs 170A and 170B can be regulated. The rubber pin 167 is not limited to a cylindrical shape. For example, various spring members such as a leaf spring may be used instead of the rubber pin 167.

As described above, according to the first embodiment, the

battery mounting portions

160A and 160B are set in the front and rear two rows in the lower connecting portion 103b of the motor housing 103, and the battery packs 170A and 160B are set in the respective

battery mounting portions

160A and 160B. 170B is removably mounted. For this reason, if the hammer drill 100 is a 36V specification, for example, two 18V battery packs 170A and 170B are mounted and electrically connected in series. The 18V battery pack is considerably lighter in weight than the 36V battery pack. From this, the operator can easily replace the battery packs 170A and 170B, that is, attach / detach the battery packs 170A and 170B to / from the

battery mounting portions

160A and 160B, and the operability of the attachment / detachment is improved. If the hammer drill 100 is 18V specification, the two

battery packs

170A and 170B may be configured to be electrically connected in parallel. At this time, the hammer drill 100 can be driven for a long time. Furthermore, when the hammer drill 100 can be driven by either 36V or 18V, the connection mode of the battery packs 170A and 170B may be switched between series and parallel. In this case, it is preferable to provide a selector switch that can switch the connection mode of the battery packs 170A and 170B by an operator.

In general, the battery packs 170A and 170B are formed in a long, substantially rectangular shape on one side. In the first embodiment, two 18V battery packs 170 A and 170 B are connected to the lower connecting portion 103 b of the motor housing 103 in the front-rear direction so that the longitudinal direction thereof intersects the major axis direction of the hammer bit 119. Arranged side by side. That is, in the state where the

battery mounting portions

160A and 160B are mounted, the battery packs 170A and 170B are arranged such that the length of the hammer bit 119 in the major axis direction is shorter than the length in the direction intersecting the major axis direction. Is done. Thereby, compared with the case where it arrange | positions so that a longitudinal direction may become the same direction as the major axis direction of the hammer bit 119, the arrangement space of

battery pack

170A, 170B regarding the major axis direction of the hammer bit 119 is made small, and the hammer drill 100 is carried out. The length in the front-rear direction, that is, the total length can be configured in a compact shape.

Further, in the first embodiment, the battery packs 170A and 170B are located on the side of the hammer drill 100 with respect to the

battery mounting portions

160A and 160B (in both the long axis direction of the hammer bit 119 and the extending direction of the hand grip 109). Inserted from the crossing direction). For this reason, the battery packs 170A and 170B are separated from each other in the direction intersecting the hammering axis of the hammer bit 119, that is, the direction intersecting the vibration direction generated by the hammering operation of the hammer bit 119, and fall off due to the influence of vibration. The possibility is reduced.

In the first embodiment, the two front and rear

battery mounting portions

160A and 160B are configured so that the center of gravity of each of the

batteries

170A and 170B corresponds to the hammer shaft 119 and the hand grip when the

batteries

170A and 170B are mounted. It is located on a plane including 109 central axes. For this reason, the weight balance of the battery packs 170 A and 170 B in the left-right direction of the hammer drill 100 can be balanced, and the operability of the hammer drill 100 is not hindered.

In the first embodiment, the

battery mounting portions

160A and 160B are mounted by sliding the mounting guides 173 of the battery packs 170A and 170B along the guide rails 161 of the

battery mounting portions

160A and 160B. Therefore, the battery packs 170A and 170B can be easily attached.

In the first embodiment, since the two

battery mounting portions

160A and 160B are provided side by side, the two

battery packs

170A and 170B are arranged in a compact manner. This facilitates the handling of the electrical wiring related to the battery packs 170A and 170B.

In the first embodiment, the battery packs 170 A and 170 B are disposed behind the motor housing 103 and below the hand grip 109. In the hammer drill 100 in which the rotating shaft of the electric motor 110 extends in the up-down direction intersecting the striking shaft, the electric motor has a structural characteristic that the region of the motor housing 103 that houses the electric motor 110 extends downward. An empty space is created behind the area that houses 110 (below the handgrip 109). In the first embodiment, the battery packs 170A and 170B are rationally arranged using this space. Further, this position is a position away from the processing position by the hammer bit 119 and does not interfere with the processing operation.

In the first embodiment, the battery packs 170A and 170B are arranged behind the motor housing 103 and below the handgrip 109, and the lower surfaces of the battery packs 170A and 170B are flush with the lower surface of the motor housing 103. Is set. For this reason, when the hammer drill 100 is placed on the ground or floor, the hammer drill 100 is stably placed.

Further, in the first embodiment, as shown in FIG. 3, a shock-absorbing elastomer 104 as an elastic member is attached to the lateral outer surface of the lower connecting portion 103b of the motor housing 103 so as to extend in the front-rear direction. Yes. When the hammer drill 100 is placed on the ground in a lateral posture such that the side surface of the hammer drill 100 contacts the ground, the end surface of the elastomer 104 contacts the ground. Therefore, it is avoided that the end faces of the battery packs 170A and 170B in the longitudinal direction are in direct contact with the ground. This protects battery packs 170A and 170B from damage due to contact with the ground or the like.

(Second embodiment of the present invention)
Next, a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 10 to 12, in the second embodiment, the front and rear battery packs 170A and 170B are arranged on both sides of the hammer drill 100 (both in the longitudinal direction of the hammer bit 119 and in the extending direction of the handgrip 109). In the case of mounting by inserting from (crossing direction intersecting the direction), the insertion direction is configured to be staggered. Other configurations are the same as those in the first embodiment. Therefore, about the structure similar to 1st Embodiment, the same code | symbol as 1st Embodiment is attached | subjected and description is abbreviate | omitted.

In the second embodiment, among the constituent members of the two front and rear

battery mounting portions

160A and 160B, the arrangement positions and orientations of the locking portion 163 and the terminal 165 are the front battery mounting portion 160A and the rear battery mounting portion 160B. Then, they are configured to be opposite to each other. Accordingly, as indicated by an arrow F in FIG. 11, one (front side) battery pack 170 A is mounted on the battery mounting portion by moving from the right side to the left side of the hammer drill 100, and the other (rear side) battery. The pack 170B is mounted on the battery mounting portion by moving from the left side of the hammer drill 100 toward the right side.

According to the second embodiment, two (even number) battery packs 170A and 170B are moved and mounted from each side of the hammer drill 100. Therefore, the combined center of gravity of the battery packs 170 A and 170 B is located on a plane including the hammer axis of the hammer bit 119 and the center axis of the handgrip 109. Therefore, it is unnecessary to set the

battery mounting portions

160A and 160B in order to position the combined center of gravity of the battery packs 170A and 170B on a plane including the hammering shaft of the hammer bit 119 and the central axis of the handgrip 109. Become. Except for the above, the same effects as those of the first embodiment are obtained.

(Third embodiment of the present invention)
Next, a third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, one battery mounting portion 160 A is provided on the lower surface portion of the lower connecting portion 103 b of the motor housing 103. Then, one battery pack 170A is moved from the side of the hammer drill 100 with respect to the battery mounting portion 160A (a crossing direction intersecting both the major axis direction of the hammer bit 119 and the extending direction of the handgrip 109). Installed.

Therefore, according to the third embodiment, since the arrangement space for the battery pack 170A is small, the lower side of the electric motor 110 can be arranged rearward. As a result, as shown in FIG. 13, the rotation shaft of the electric motor 110 can be arranged so as to be orthogonal to the striking shaft, and accordingly, the motor housing 103 can be made compact and the hammer drill 100 can be downsized. Except for the above, there are substantially the same effects as those of the first embodiment.

(Fourth embodiment of the present invention)
Next, a fourth embodiment of the present invention will be described with reference to FIG. As shown in FIG. 15, the fourth embodiment includes a rib 103 c that extends downward at the center of the lower surface of the lower connecting portion 103 b of the motor housing 103. The rib 103c is provided between the front battery mounting portion 160A and the rear battery mounting portion 160B. The lower surface of the rib 103c is formed to be flush with the lower surface of the hammer drill 100 (the lower surface of the motor housing 103). This rib 103c is an implementation structural example corresponding to the "partition wall" in this invention. The configuration other than the above is configured in the same manner as in the first embodiment described above.

According to the fourth embodiment, when the hammer drill 100 is placed on the ground or the like, the rib 103c is used as a stand (pedestal) together with the lower surface of the motor housing 103. Thereby, the hammer drill 100 is stably mounted. In addition to the above, the same effects as in the first embodiment are obtained. In addition, about the insertion direction of

battery pack

170A, 170B with respect to

battery mounting part

160A, 160B in 4th Embodiment, the same direction may be sufficient like 1st Embodiment, and it mutually differs like 2nd Embodiment. It may be a direction.

In each of the above embodiments, the guide rail 161 and the locking portion 163 are integrally formed with the motor housing 103 as the constituent members of the

battery mounting portions

160A and 160B, but the present invention is not limited to this. For example, a guide rail 161 and a locking portion 163 that are separate from the motor housing 103 may be fixedly attached to the motor housing 103. Moreover, you may provide three or more battery mounting parts.

In each of the embodiments described above, the hammer drill that performs the striking operation and the rotating operation has been described as an example of the striking tool. However, the present invention may be applied to a hammer in which the hammer bit 119 performs only the striking operation.

In view of the gist of the above invention, the impact tool according to the present invention can be configured in the following manner.
(Aspect)
An impact tool in which a tool bit linearly moves on an impact axis extending at least in the longitudinal direction,
A motor for driving the tool bit;
A tool body for housing the motor;
A mounting portion on which a battery for supplying current to the motor is detachably mounted;
The mounting portion has a battery engaging portion with which the battery can be engaged, and is configured to hold the battery by engaging the battery engaging portion,
The battery is mounted on the mounting portion by sliding the battery with respect to the battery engaging portion in a normal direction of a virtual plane formed by the striking shaft and the rotation shaft of the motor. The impact tool characterized by being made.

(Correspondence between each component of the embodiment and the 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 main body 101 is an example of a configuration corresponding to the “tool main body” of the present invention.
The hammer bit 119 is an example of a configuration corresponding to the “tool bit” of the present invention.
The electric motor 110 is an example of a configuration corresponding to the “motor” of the present invention.
The mounting portion 160 is an example of a configuration corresponding to the “mounting portion” of the present invention.
The

battery mounting portions

160A and 160B are an example of a configuration corresponding to the “battery mounting portion” of the present invention.
The battery packs 170A and 170B are an example of a configuration corresponding to the “battery” of the present invention.
The guide rail 161 is an example of a configuration corresponding to the “battery engaging portion” of the present invention.
The rib 103c is an example of a configuration corresponding to the “partition wall” of the present invention.

DESCRIPTION OF SYMBOLS 100 Hammer drill 101 Main body part 103 Motor housing 103a Upper connection part 103b Lower connection part 103c Rib 104 Elastomer 105 Gear housing 109 Hand grip 109A Grip part 109a Trigger 110 Electric motor 111 Motor shaft 119 Hammer bit 120 Motion conversion mechanism 121 Intermediate shaft 123 Rotating body 125 Swing member 127 Cylindrical piston 127a Air chamber 129 Cylinder 140 Strike element 143 Strike 145 Impact bolt 150 Power transmission mechanism 151 First gear 153 Second gear 159 Tool holder 160

Mounting portion

160A, 160B Battery mounting portion 161 Guide rail 163 Locking portion 165 Terminal 167

Rubber pin

170A, 170B Battery pack 171 Battery case 173 Mounting guide 175 Lock Push-button 179 terminal for the hook 177 unlocking of use

Claims

An impact tool in which a tool bit moves at least linearly on an impact axis extending in a predetermined major axis direction,
A motor for driving the tool bit;
A tool body for housing the motor;
A handle connected to the tool body;
A mounting portion on which a battery for supplying current to the motor is detachably mounted;
The handle is provided so as to extend in a handle extending direction that intersects the major axis direction,
The mounting portion has a battery engaging portion with which the battery can be engaged, and is configured to hold the battery by engaging the battery engaging portion,
As the battery slides with respect to the battery engaging portion in an intersecting direction intersecting both the major axis direction and the handle extending direction, the battery is attached to the attachment portion. A striking tool characterized by comprising.
The impact tool according to claim 1,
The mounting portion is configured such that the center of gravity of the battery mounted on the mounting portion is positioned on a plane including the striking shaft and a handle central axis extending in the handle extending direction. Characteristic impact tool.
The impact tool according to claim 1 or 2,
The mounting portion has a plurality of battery mounting portions to which a plurality of batteries are detachably mounted,
The impact tool according to claim 1, wherein the plurality of battery mounting portions are provided side by side in the major axis direction.
The impact tool according to claim 3,
A partition wall provided between at least two of the plurality of battery mounting portions and extending in the handle extending direction;
A striking tool characterized in that the lower end surface of the partition wall and the lower end surface of the tool body are flush with each other when the handle extending direction is defined as the vertical direction.
The impact tool according to claim 3 or 4,
The mounting portion includes an even number of battery mounting portions to which the even number of batteries are detachably mounted,
The battery mounting portion which is half of the even number of battery mounting portions is configured such that the battery is mounted by sliding the battery with respect to the battery engaging portion in one direction. And
Of the even number of the battery mounting parts, the battery mounting part of the other half is slid with respect to the battery engaging part in a direction opposite to the one direction, so that the battery A striking tool characterized by being configured to be mounted.
The striking tool according to any one of claims 3 to 5,
The mounting portion includes an even number of battery mounting portions to which the even number of batteries are detachably mounted,
Each said battery mounting part is comprised so that the said battery may be moved and mounted | worn from the direction opposite to the said battery mounting part adjacent to each other, The impact tool characterized by the above-mentioned.
The impact tool according to any one of claims 3 to 6,
The plurality of battery mounting portions are arranged such that the combined centroids of the plurality of batteries mounted on the plurality of battery mounting portions are located on a plane including the striking shaft and a handle central axis extending in the handle extending direction. A striking tool characterized by comprising:
The striking tool according to any one of claims 1 to 7,
The said impact motor characterized by the said motor being provided so that the rotating shaft of the said motor may cross | intersect the said impact shaft.