WO2019003742A1 - Electrically powered tool - Google Patents

Abstract

Provided is an electrically powered tool wherein the dislodgement of a battery pack from the electrically powered tool body can be easily prevented. A hammer drill body 10 has: a guide rail 25A which can engage with a battery pack 8 and which guides the movement of the battery pack 8 relative to the hammer drill 1 while being engaged with the battery pack 8; an engagement protrusion 25B which, when the battery pack 8 is located at a second position, restricts the movement of the battery pack 8 from the second position to a third position, the movement being guided by the guide rail 25A; and a restriction section 26 which can be changed between a first state in which the movement of the battery pack 8 from a first position to the third position is restricted and the movement of the battery pack 8 from the first position to the second position is permitted, and a second state in which the movement of the battery pack 8 from the first position to the third position is permitted.

Description

Electric tool

The present invention relates to a power tool.

BACKGROUND ART Conventionally, a power tool that forms a drilled hole in a workpiece (for example, concrete, steel, wood, etc.) by rotating a tip tool by driving a motor, or breaks it by applying an impact force to the tip tool Is widely known.

Although it is conceivable to use a battery pack to supply electric power to the motor in such an electric power tool, there is a possibility that the battery pack may drop out of the electric power tool main body due to the occurrence of vibration during work.

For example, Patent Document 1 discloses a hammer drill in which a holding band made of a stretchable material is provided separately from the power tool body and the battery pack in order to prevent the battery pack from falling off during work. . The holding band has a fixed end on one end side fixed to the housing and a free end on the other end side detachably attached to a locking portion formed on the housing.

JP 2011-136407 A

However, in the hammer drill described in Patent Document 1, there is a possibility that cost increases due to an increase in the number of parts because a holding band for preventing the battery pack from falling off is provided separately from the main body and the battery pack. In addition, in order to fix the holding band, it is troublesome for the operator to carry out an operation of locking the free end of the holding band to the housing.

Then, an object of this invention is to provide the electric tool which can prevent drop-off | omission of the battery pack from an electric tool main body easily.

In order to solve the above problems, the present invention comprises a main body having a motor, a drive unit driven by the motor, and a tool side terminal portion electrically connected to the motor, and a drive power supply of the motor A battery pack comprising: a battery; and a battery side terminal portion electrically connected to the battery, wherein the main body is engageable with the battery pack, and the battery The battery pack is positioned at the second position, and the guide portion guides relative movement with respect to the main body between the second position and the third position via the first position of the battery pack in the state of being engaged with the pack In this case, a first restricting portion that restricts movement from the second position guided by the guide portion to the third position of the battery pack, and a direction from the first position to the third position of the battery pack Regulate movement Change between the first state allowing movement from the first position to the second position and the second state allowing movement of the battery pack from the first position to the third position And the battery pack is engaged with the guide unit by moving the battery pack in a direction to move the battery pack away from the main body while being guided by the guide unit. The present invention provides a power tool characterized in that it is configured to be releasable.

In the electric power tool configured as described above, even when restriction on movement in the direction from the second position to the third position by the first restriction part is released, the second restriction part moves in the direction from the first position to the third position. Since the movement is restricted, it is possible to easily suppress the drop of the battery pack from the power tool main body. Further, since the second restricting portion is provided in the power tool body, it is possible to suppress the cost increase due to the increase in the number of parts.

In the above configuration, when the battery pack travels from the third position to the second position in the process of the relative movement, the first restricting portion is moved by the first restricting portion after the second restricting portion is in the first state. Preferably, movement from the second position to the third position is restricted.

According to such a configuration, it is possible to easily suppress dropping of the battery pack from the power tool main body.

Further, the battery pack includes an engagement member engaged with the first regulation portion, and a battery side operation portion capable of releasing the engagement between the first regulation portion and the engagement member by being operated from the outside. And a locking portion having a second portion, and the movement of the battery pack from the second position to the third position is restricted by the engagement of the first restricting portion and the engaging member. The second regulation unit has a tool-side operation unit operable from the outside, and when the battery pack is positioned at the second position, the first operation unit is operated by operating the battery-side operation unit. The restriction on the movement of the battery pack from the second position to the third position by the restriction unit is released, and the second restriction unit is changed to the second state by operating the tool-side operation unit The battery pack can be It is preferred that can be moved to the location.

According to such a configuration, the battery side operation unit is operated to release the restriction on the movement of the battery pack from the second position to the third position by the first restriction unit, and the tool side operation unit is operated The second regulation portion is changed to the second state by being operated, and the battery pack can be moved to the third position, so the battery pack falls off the power tool main body unintentionally It is possible to suppress the

Further, when the battery pack is positioned at the second position, the battery side operation unit is operated to move the battery pack from the second position toward the third position by the first restricting portion. It is possible to move the battery pack to the third position only when the restriction is released and the second restricting part is changed to the second state by operating the tool side operation part. Is preferred.

According to such a configuration, the battery side operation unit is operated to release the restriction on the movement of the battery pack from the second position to the third position by the first restriction unit, and the tool side operation unit is operated Because the battery pack can be moved to the third position only when the second restricting portion is changed to the second state, the battery pack is unintentionally dropped from the power tool main body. It becomes possible to control that it does.

Preferably, the main body is provided with an elastic body, and the first restricting portion and the engagement member are engaged with each other in a state where the elastic body is compressed.

According to such a configuration, since the first restricting member and the engaging member are engaged in a state where the elastic body is compressed, the elastic force of the elastic body suitably makes the relative relation between the power tool main body and the battery pack It becomes possible to mount the battery pack on the power tool body in a state in which the movement is suppressed.

Moreover, it is preferable that the said main body further has a handle part which an operator grips, and the said 2nd control part is provided in the said handle part.

According to such a configuration, it is possible to suppress the cost increase due to the increase in the number of parts as compared with the case where the second restricting portion is provided separately from the main body and the battery pack.

The battery pack further includes a housing, and the battery side operation unit is located opposite to the elastic body with respect to the guide unit when the battery pack is positioned at the second position, and the tool Preferably, the side operation unit is provided at an end portion of the handle portion adjacent to the battery side operation unit when the battery pack is positioned at the second position.

According to such a configuration, the tool side operation unit is provided on the rear side of the battery pack, and the battery side operation unit is positioned so as to be adjacent to the tool side operation unit when the battery pack is positioned at the second position. doing. That is, since the battery side operation part and the tool side operation part are collectively arrange | positioned on the rear side of the battery pack, the operativity with respect to a battery side operation part and a tool side operation part of a worker improves.

Further, the housing extends in a predetermined direction, and the housing has a first wall portion and a second wall portion opposite to each other with respect to the battery in a direction orthogonal to the predetermined direction. The battery side operation unit has a first battery side operation unit and a second battery side operation unit, and the first battery side operation unit is provided on the first wall portion, and the second battery side operation unit Is preferably provided on the second wall portion.

According to such a configuration, the operability of the operator on the battery side operation unit is improved.

Moreover, it is preferable that the said tool side operation part is provided between the said 1st wall part and the said 2nd wall part in the direction orthogonal to the said predetermined direction.

According to such a configuration, for example, it is possible to operate the tool-side operation unit with the index finger while operating the battery-side operation unit with the thumb and the middle finger, so that the battery-side operation unit and the tool side of the worker The operability of the operation unit is improved.

Further, the housing is provided with a remaining amount display portion for displaying the remaining amount of the battery between the first wall portion and the second wall portion in a direction orthogonal to the predetermined direction. Is preferred.

According to such a configuration, the operator can easily grasp the replacement time of the battery pack visually.

The second restricting portion is provided with an abutting portion that abuts on the housing, and movement of the battery pack from the first position to the third position is caused by the abutment of the battery pack and the abutting portion. It is preferable to be regulated.

According to such a configuration, it is possible to easily suppress dropping of the battery pack from the power tool main body.

Further, the battery pack has a guided portion engaged with the guide portion, and slides the guided portion against the guide portion in a state where the guide portion and the guided portion are engaged with the battery pack. It is preferable that it is possible to move to the said 2nd position, without operating both the said battery side operation part and the said tool side operation part by making it move.

According to such a configuration, it is possible to easily attach the battery pack to the power tool main body, and it is also possible to easily suppress the battery pack from dropping off from the power tool main body.

In the second position, the battery side terminal portion and the tool side terminal portion are in contact with each other, and in the first position, the battery side terminal portion and the tool side terminal portion are separated from each other. Is preferred.

According to such a configuration, it is possible to suppress damage to the terminal due to vibration.

In addition, the motor has a rotation axis, and the drive unit is configured to be able to attach and detach the tip tool, and transmits the rotational motion of the rotation axis and rotates the tip tool in the rotation direction about an axis extending in a predetermined direction. It is preferable to further include a power transmission unit capable of rotating and converting the rotational motion of the rotation shaft into a reciprocating motion to reciprocate the tip tool in the predetermined direction.

According to such a configuration, it is possible to transmit the rotational motion of the rotational shaft and rotate the tip tool in the rotational direction about an axis extending in a predetermined direction, and convert the rotational motion of the rotational shaft into a reciprocating motion to In an electric power tool such as a hammer drill having a power transmission portion capable of reciprocating the tool in a predetermined direction, it is possible to easily suppress detachment of the battery pack from the electric power tool main body.

According to the electric power tool of the present invention, it is possible to easily suppress the drop of the battery pack from the electric power tool main body.

It is a figure which shows the internal structure of the hammer drill main body concerning embodiment of this invention. The state where the battery pack is attached to the hammer drill main body is shown. It is a figure which shows the internal structure of the hammer drill main body concerning embodiment of this invention. It is an expansion perspective view showing a guide part of a hammer drill body concerning an embodiment of the invention. It is a side view which shows the relationship of the hammer drill main body and a battery pack in the case of making the battery pack remove | deviate from a hammer drill main body regarding the hammer drill concerning embodiment of this invention. It is a side view which shows the relationship of the hammer drill main body and a battery pack in the case of mounting a battery pack in a hammer drill main body regarding the hammer drill concerning embodiment of this invention.

A hammer drill 1 which is an example of a power tool according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. The hammer drill 1 is an electric power tool for forming a drilled hole in a material to be processed (for example, concrete, steel, wood, etc.) or crushing it by applying a striking force.

In the following description, "upper" shown in FIG. 1 is defined as upward, "down" as downward, "front" as front, and "rear" as rear. Further, the “right” when the hammer drill 1 is viewed from behind is defined as the right direction, and the “left” is defined as the left direction. When dimensions, numerical values, etc. are referred to in this specification, not only dimensions and numerical values that completely coincide with the dimensions, numerical values, etc., but also substantially identical dimensions, numerical values, etc. (for example, when within manufacturing error range Shall be included. Similarly, "substantially identical", "substantially orthogonal", "substantially parallel", "substantially identical", "substantially identical" for "identical", "orthogonal", "parallel", "coincidence", "planar", etc. Etc. shall be included.

As shown in FIG. 1, the hammer drill 1 has a hammer drill body 10 and a battery pack 8. The hammer drill main body 10 mainly includes a housing 2, a motor 3, an inverter circuit board unit 4, a control unit 5, a power transmission unit 6, and an output unit 7. The hammer drill main body 10 is an example of the “main body” in the present invention.

As shown in FIG. 1, the housing 2 has a motor housing 21, a gear housing 22, a back cover 23 and a handle housing 24, and as shown in FIG. 26 mainly includes a battery connection terminal 27 and an elastic body 28.

As shown in FIGS. 1 and 2, the motor housing 21 has a substantially cylindrical shape extending in the vertical direction, and accommodates the motor 3 and the inverter circuit board portion 4.

The motor 3 is a DC brushless motor, and has a rotating shaft 31, a rotor 32, a stator 33 and a fan 34. The motor 3 is an example of the "motor" in the present invention.

The rotating shaft 31 extends vertically and is rotatably supported by the housing 2. A pinion 31A that rotates integrally with the rotation shaft 31 is fixed to the upper end portion of the rotation shaft 31. The rotating shaft 31 is an example of the “rotating shaft” in the present invention.

The rotor 32 is a rotor having a permanent magnet (not shown), and is provided on the rotating shaft 31 so as to be integrally rotatable with the rotating shaft 31.

The stator 33 is a stator having a stator winding (not shown). The stator 33 is fixed to the inner circumferential surface of the motor housing 21.

The fan 34 is fixed to the rotating shaft 31 so as to be integrally rotatable with the rotating shaft 31 below the pinion 31A.

The inverter circuit board unit 4 is provided above the stator 33 of the motor 3. The inverter circuit board unit 4 has a board 40. The substrate 40 is fixed to the stator 33 via an insulator. An inverter circuit (not shown) for supplying power of the battery pack 8 to the motor 3 and controlling the rotation of the motor 3 and a magnetic sensor (not shown) for detecting the rotational position of the rotor 32 are provided on the substrate 40. Etc. are implemented.

As shown in FIGS. 1 and 2, the gear housing 22 is made of metal, connected to the upper portion of the motor housing 21 and extends in the front-rear direction. The gear housing 22 accommodates therein the power transmission unit 6 and a part of the output unit 7. Further, the gear housing 22 is attached with a side handle 2A which is gripped by an operator.

The power transmission unit 6 includes a power conversion mechanism 61 and a rotational force transmission mechanism 62. The power transmission unit 6 can convert the rotation of the rotation shaft 31 of the motor 3 into a reciprocating motion and transmit it to the output unit 7, and The rotation of the rotary shaft 31 can be transmitted to the output unit 7. The power transmission unit 6 is an example of the “power transmission unit” in the present invention.

The output unit 7 is disposed above the rotational force transmission mechanism 62 in the gear housing 22. The output unit 7 includes a striker 71, a cylinder 72, and a tool holding unit 73 to which the tip tool P can be attached and detached. The output unit 7 is an example of the “drive unit” in the present invention. The tip tool P is an example of the "tip tool" in the present invention.

The striker 71 is configured to be capable of reciprocating by the power conversion mechanism 61. The front end of the striker 71 is configured to be able to abut on the rear end of the tip tool P attached to the tool holding portion 73, and the tip tool P moves in the front-rear direction as the striker 71 reciprocates in the front-rear direction. It can reciprocate.

The cylinder 72 is configured to be rotatable about an axis A extending in the front-rear direction by receiving the rotational force of the motor 3 via the rotational force transfer mechanism 62. Further, the tool holding portion 73 is rotated by the rotation of the cylinder 72, and the tip tool P mounted on the tool holding portion 73 is configured to be rotatable about the axis A. The axis A is an example of the "axis" in the present invention. The tip tool P is an example of the "tip tool" in the present invention.

As shown in FIGS. 1 and 2, the back cover 23 extends in the vertical direction and is disposed to cover the rear of the motor housing 21 and the gear housing 22. The back cover 23 is provided with an inserted portion 23A and a connection portion 23B.

The inserted portion 23A protrudes rearward at the lower side of the back cover 23. A through hole penetrating in the left-right direction is formed in the insertion portion 23A.

The connection portion 23 B extends in the front-rear direction at the upper end portion of the back cover 23.

Further, the control unit 5 is fixed in the back cover 23. The control unit 5 has a flat substrate (not shown), and various circuits and the like for controlling the hammer drill 1 are mounted on the substrate. The control unit 5 is electrically connected to the inverter circuit board unit 4.

As shown in FIGS. 1 and 2, the handle housing 24 is substantially U-shaped in a side view, and is located behind the back cover 23. The handle housing 24 is configured as a split housing divided by a split surface (virtual surface) that passes through the center in the left-right direction of the housing 2 and is orthogonal to the left-right direction, and the split right and left portions , Are configured approximately symmetrically with respect to the division plane. The handle housing 24 has a grip portion 24B, a first connection portion 24C, a second connection portion 24D, and an extension portion 24F.

The gripping portion 24B is a portion gripped by a worker at the time of operation, and extends in the vertical direction. A manually operable trigger 24A for controlling the start and stop of the motor 3 is provided on the front upper portion of the grip portion 24B. At a lower portion of the grip portion 24B, a protrusion 24H protruding forward from the inner surface of the grip portion 24B and a shaft 24G extending in the left-right direction are provided. Further, an opening 24a and an opening 24b are formed in the lower part of the grip portion 24B. The grip portion 24B is an example of the "handle portion" in the present invention.

The first connection portion 24C extends forward from the lower end portion of the grip portion 24B. Inside the front portion of the first connection portion 24C, a shaft 24E extending in the left-right direction is provided. The shaft 24E is inserted through the through hole of the insertion portion 23A. The handle housing 24 is configured to be rotatable about a shaft 24E.

The second connection portion 24D extends forward from the upper end portion of the grip portion 24B. The vibration reduction mechanism 2B is provided in the second connection portion 24D, and the second connection portion 24D is connected to the connection portion 23B of the back cover 23 via the vibration reduction mechanism 2B. The vibration reduction mechanism 2B is configured to include an elastic body (not shown). Even when vibration in the direction of the axis A occurs in the output unit 7, the handle housing 24 pivots about the shaft 24E, and the elastic body (not shown) of the vibration reduction mechanism 2B expands and contracts to vibrate in the direction of the axis A. Is absorbed, and it is reduced that the vibration in the direction of the axis A is transmitted to the worker who holds the grip 24B.

The extension part 24F is provided to extend downward from the front end of the first connection part 24C.

As shown in FIG. 2, the engagement portion 25 is provided below the first connection portion 24 </ b> C of the handle housing 24 and extends in the front-rear direction. As shown in FIG. 3, the engaging portion 25 has a guide rail 25A, a locking projection 25B, and a base 25C. The engaging portions 25 are provided substantially symmetrically with respect to the division surface of the handle housing 24. The dividing surface is a surface that divides the handle housing 24 into the left and right portions as described above.

The base 25C is in the form of a flat plate extending downward from the lower end of the first connection portion 24C and extending in the front-rear direction.

The guide rail 25A protrudes inward in the left-right direction from the base 25C and extends in the front-rear direction. The guide rail 25A is an example of the "guide portion" in the present invention.

The locking projection 25B is provided at the rear end portion of the guide rail 25A, and protrudes inward in the left-right direction from the guide rail 25A. The locking projection 25B is an example of the "first regulating portion" in the present invention.

As shown in FIG. 2, the battery connection terminal 27 is provided below the first connection 24 </ b> C. The battery connection terminal portion 27 is located at a position overlapping the guide rail 25A in the front-rear direction and the left-right direction. The battery connection terminal unit 27 is electrically connected to the motor 3 and the control unit 5 and the like. The battery connection terminal 27 has a plurality of terminals. The battery connection terminal 27 is an example of the “tool-side terminal” in the present invention.

As shown in FIG. 1 and FIG. 2, the elastic body 28 is an elastic body made of resin, and is provided at a substantially central portion in the vertical direction of the extending portion 24F of the handle housing 24. The elastic body 28 protrudes rearward from the rear surface of the extension 24F. The elastic body 28 is an example of the “elastic body” in the present invention.

As shown in FIG. 2, the restricting portion 26 is configured to prevent the battery pack 8 from falling off the hammer drill main body 10, and is provided at the lower end portion of the grip portion 24 </ b> B. As a result, compared to the case where the restricting portion 26 is provided separately from the hammer drill main body 10 and the battery pack 8, it is possible to suppress the cost increase due to the increase in the number of parts. The restricting portion 26 has a rotating portion 261 and a spring 262.

The pivoting portion 261 includes an operation projection 261A, a restriction projection 261B, and a pivoting main body portion 261C. The pivoting portion 261 is an example of the “second regulating portion” in the present invention.

The pivoting main body portion 261 </ b> C extends in the vertical direction in a state of being biased by the spring 262. Although not shown in the figure, a through hole penetrating in the left-right direction is formed in the upper portion of the rotation main body portion 261C, and a shaft 24G provided at the lower end portion of the grip portion 24B of the handle housing 24 in the through hole is By being inserted, the pivoting portion 261 is configured to be pivotable with the shaft 24G as a fulcrum.

The operation projection 261A is provided integrally with the rotation main body portion 261C at the upper portion of the rotation main body portion 261C. The operation projection 261A is exposed to the outside of the grip portion 24B through the opening 24a of the handle housing 24. The operation protrusion 261A is an example of the "tool side operation unit" in the present invention.

The restriction protrusion 261B is provided integrally with the rotation main body portion 261C at a lower portion of the rotation main body portion 261C. The restriction protrusion 261B is exposed to the outside of the grip portion 24B through the opening 24b of the handle housing 24. Further, in the case where the pivoting portion 261 pivots with the shaft 24G as a fulcrum, the restriction projection 261B is configured to pass slightly inward of the surface forming the front portion of the opening 24b (FIG. 4 (a )reference).

The spring 262 is a torsion spring and is externally mounted on the shaft 24G. The spring 262 has one end 262A and the other end 262B.

The one end portion 262A is provided at one end portion in the winding direction of the spring 262, and is locked to the projection 24H of the grip portion 24B. The other end 262B is provided at the other end in the winding direction of the spring 262, and is locked to the front surface of the lower portion of the rotation main body 261C. As shown in FIGS. 1 and 2, in the pivoting portion 261, one end 262A is engaged with the projection 24H and the other end 262B is engaged with the lower front surface of the pivoting main body 261C. Thus, the hammer drill 1 is urged clockwise in a side view.

Next, the configuration of the battery pack 8 according to the present embodiment will be described with reference to FIG. The battery pack 8 is detachably mounted on the hammer drill main body 10, and the following description will be made based on the state where the battery pack 8 is mounted on the hammer drill main body 10 unless otherwise stated. The battery pack 8 is an example of the "battery pack" in the present invention.

As shown in FIG. 1, the battery pack 8 mainly includes a battery pack housing 81, a guided portion 82, and a locking member 83, which form the outer shell thereof. The battery pack 8 is configured to be substantially symmetrical with respect to the division surface (virtual surface) of the handle housing 24 described above.

The battery pack housing 81 has a substantially rectangular parallelepiped shape extending in the front-rear direction, and a secondary battery (not shown) is accommodated therein. Further, although not shown in the drawing, a battery side terminal portion electrically connected to the secondary battery and having a plurality of terminals is provided at the upper front portion of the battery pack housing 81. In the present embodiment, the battery pack 8 is mounted on the hammer drill main body 10, and the terminal of the battery side terminal portion contacts the terminal of the battery connection terminal portion, whereby the electric power is supplied to the motor 3, the controller 5, etc. It is configured to be available. The upper rear surface of the battery pack housing 81 is opposed to the front surface of the restriction protrusion 261B in the front-rear direction. The rear surface of the upper portion of the battery pack housing 81 is configured to be substantially flush with the surface forming the front of the opening 24 b of the handle housing 24. Further, the battery pack housing 81 has a right side surface and a left side surface (not shown) which are located on opposite sides of the battery in the left-right direction. The battery side terminal portion is an example of the "battery side terminal portion" in the present invention. The front-rear direction is an example of the “predetermined direction” in the present invention. The right side surface and the left side surface of the battery pack housing 81 are examples of the “first wall portion” and the “second wall portion” in the present invention, respectively.

The guided portion 82 is provided on the front upper portion of the battery pack 8. The guided portion 82 has a wall 82A and a rib 82B. The guided portion 82 is an example of the "guided portion" in the present invention.

The wall 82A extends in the front-rear direction. At the rear of the wall 82A, a through 82a is formed penetrating in the left-right direction.

The rib 82B protrudes outward in the left-right direction from the top of the wall 82A, and extends in the front-rear direction.

The locking member 83 is provided on the upper portion of the battery pack 8 and includes a locking claw 83A and a pressed portion 83B. The locking member 83 is configured substantially symmetrically with respect to the dividing surface (virtual surface) of the handle housing 24, and the locking members 83 positioned on the right and left are attached outward in the left-right direction by a biasing member not shown. It is powered. The locking member 83 located on the right side is provided on the right side surface of the battery pack housing 81, and the locking member 83 located on the left side is provided on the left side surface of the battery pack housing 81. The locking member 83 is an example of the "locking portion" in the present invention.

The locking claw 83A is located at the front of the locking member 83, and has a hook shape whose tip protrudes outward in the left-right direction. The locking claw 83A is an example of the "engaging member" in the present invention.

The pressed portion 83B is located on the opposite side to the elastic body 28 with respect to the guide rail 25A. The pressed portion 83B is located at the rear of the locking member 83, and is located outside in the left-right direction than the protruding end (tip end) of the corresponding locking claw 83A. As shown in FIG. 1, the pressed portion 83 </ b> B is adjacent to the lower end of the grip 24 </ b> B. The pressed portion 83B is an example of the "battery side operation portion" in the present invention. The pressed portion 83B located on the right side is an example of the "first battery side operation portion" in the present invention. The pressed portion 83B located on the left side is an example of the “second battery side operation portion” in the present invention.

Further, the restricting portion 26 is located between the right side surface and the left side surface of the battery pack housing 81 in the left-right direction. Therefore, for example, while it is possible to operate the operation projection 261A with the index finger while operating the pressed portion 83B with the thumb and the middle finger, the operability of the operator for the pressed portion 83B and the operation projection 261A is improved. Do.

Next, the operation of the hammer drill 1 will be described with reference to FIG.

When the operator pulls the trigger 24A of the grip 24B, the control unit 5 starts driving control of the motor 3. When the drive control is started, the electric power of the secondary battery accommodated in the battery pack 8 is supplied to the motor 3, and the rotation shaft 31 rotates. The rotational force of the rotary shaft 31 is transmitted to the output unit 7 through the power transmission unit 6, and the tip tool P mounted on the tool holding unit 73 starts rotational reciprocation.

Here, since the power stored in the secondary battery in the battery pack 8 is consumed along with the progress of the work, it is necessary to periodically remove the battery pack 8 from the hammer drill main body 10 and replace the secondary battery. is there. In this case, the charged secondary battery is accommodated in the battery pack 8, and the battery pack 8 is remounted to the hammer drill body 10. Hereinafter, the operation of attaching and detaching the battery pack 8 to the hammer drill main body 10 will be described in detail with reference to FIG. 4 and FIG.

First, an operation for removing the battery pack 8 from the hammer drill 1 will be described with reference to FIG.

When the operator presses the pressed portion 83B inward in the left-right direction in order to separate the battery pack 8 from the hammer drill 1, the locking member 83 resists the biasing force of the biasing member (not shown) in the left-right direction. Move to

In this state, as shown in FIG. 4A, the operator moves the operation projection 261A of the restricting portion 26 downward. The pivoting portion 261 pivots counterclockwise with the shaft 24G as a fulcrum against the biasing force of the spring 262 in the clockwise direction in the side view of the hammer drill 1, and the restricting protrusion 261B is accommodated in the gripping portion 24B. Be done. In this case, since the lower end portion of the restricting protrusion 261B is configured to be rotatable to the upper side than the upper surface position of the battery pack 8, the restricting portion 26 does not restrict the rearward movement of the battery pack 8 . Thus, the state of the pivoting portion 261 when the pivoting portion 261 pivots in the counterclockwise direction and the regulating projection 261B is accommodated in the gripping portion 24B corresponds to the “second state” of the present invention. ing.

As shown in FIG. 4B, when the operator keeps the pressed portion 83B pressed and slides the battery pack 8 backward, the battery pack 8 moves along the guide rails 25A of the engaging portion 25. Is moved relative to the rear. As shown in FIG. 4C, when the front end of the rib 82B and the top surface of the battery pack housing 81 are separated rearward from the guide rail 25A, the battery pack 8 is detached from the hammer drill body 10. As shown in FIG. 4C, the rear face of the upper part of the battery pack housing 81 and the front face of the restriction protrusion 261B do not face each other, and the battery pack 8 can be detached from the hammer drill main body 10 The relative position to the hammer drill body 10 is an example of the “third position” in the present invention.

The electrical connection between the battery pack 8 and the hammer drill 1 (contact between the battery side terminal and the terminal of the battery connection terminal) is also released when the battery pack 8 is slid and moved by a predetermined amount.

Here, in the present embodiment, in the case where the pivoting portion 261 pivots with the shaft 24G as a fulcrum, the restriction projection 261B is configured to pass slightly inside the surface forming the front of the opening 24b. Because the rear surface of the upper portion of the battery pack housing 81 is configured to be substantially flush with the surface forming the front portion of the opening 24b of the handle housing 24, the restriction projection 261B is accommodated in the grip portion 24B. In the absence state, the rear surface of the upper part of the battery pack 8 abuts on the restriction protrusion 261B, and can not slide backward. That is, in the present embodiment, the operator operates the pressed portion 83B and operates the operation protrusion 261A to rotate the rotation portion 261 so that the restriction protrusion 261B is not accommodated in the grip portion 24B. Since the battery pack 8 can not be slid backward with respect to the hammer drill main body 10, it is possible to suppress the battery pack 8 from falling off the hammer drill main body 10 unintentionally.

Next, the operation of attaching the battery pack 8 to the hammer drill 1 will be described with reference to FIG. 5 while referring to the effects associated with the provision of the restricting portion 26.

In order to attach the battery pack 8 to the hammer drill main body 10, as shown in FIG. 5A, the guide rail 25A of the engaging portion 25 is pinched by the front end of the rib 82B and the upper surface of the battery pack housing 81. The battery pack 8 is inserted while being slid forward along the guide rail 25A.

At this time, as shown in FIG. 5B, the restricting protrusion 261B of the rotating portion 261 abuts on the upper portion of the battery pack 8 and is pushed forward. The pivoting portion 261 pivots in the counterclockwise direction against the biasing force of the spring 262 in the clockwise direction in the side view of the hammer drill 1 with the shaft 24G as a fulcrum. At this time, in the rotating portion 261, the restricting protrusion 261B is configured to be able to rotate to a position higher than the upper surface position of the battery pack 8, so that the battery pack 8 is restricted from moving forward by the restricting portion 26. There is nothing to do.

When the battery pack 8 slides forward, the locking claw 83A protruding from the wall 82A of the guided portion 82 is pressed inward in the left-right direction by the locking projection 25B of the engaging portion 25 and is not shown. It moves inward in the left-right direction against the biasing force of the biasing member.

If the battery pack 8 is further slid forward and the locking claw 83A passes the locking protrusion 25B, the locking claw 83A is pushed outward in the left-right direction by the biasing force of the biasing member (not shown), and the locking protrusion It is locked to 25B. When the locking claw 83A is locked to the locking projection 25B, the further forward movement of the battery pack 8 is restricted.

At this time, as shown in FIG. 5 (c), the elastic body 28 is compressed by the front surface of the battery pack housing 81. In this state, when the battery pack 8 receives an elastic force directed rearward from the elastic body 28, the locking projections 25B and the locking claws 83A are strongly engaged with each other. Thus, the battery pack 8 can be mounted on the hammer drill 1 in a state where the relative movement between the hammer drill 1 and the battery pack 8 is suitably suppressed by the elastic force of the elastic body 28. Further, as described above, by sliding the guided portion 82 of the battery pack 8 with respect to the guide rail 25A of the engaging portion 25, the battery pack 8 can be operated without operating any of the operation protrusion 261A and the pressed portion 83B. It is possible to mount on the hammer drill 1. As shown in FIG. 5C, the relative position of the battery pack 8 to the hammer drill main body 10 in the state where the locking claw 83A is locked to the locking projection 25B is the “second position in the present invention. It corresponds to ".

When mounting of the battery pack 8 to the hammer drill 1 is completed, the terminal of the battery side terminal portion and the terminal of the battery connection terminal portion 27 come into contact with each other, and the hammer drill 1 and the battery pack 8 are electrically connected.

Here, conventionally, there has been a possibility that attachment of the battery pack to the power tool body may be released unintentionally. In such a case, in the conventional electric power tool, there is a possibility that the battery pack may be detached from the electric power tool main body during the operation.

However, in the present embodiment, as shown in FIG. 5C, the rear surface of the upper portion of the battery pack 8 and the front surface of the restriction protrusion 261B are opposed in the front-rear direction. Even in the case where the battery pack 8 is unintentionally moved backward, the battery pack 8 abuts on the restriction protrusion 261B, and the battery pack 8 is preferably prevented from falling off the hammer drill main body 10. As shown in FIG. 5C, the relative position of the battery pack 8 to the hammer drill main body 10 in the state where the rear face of the upper part of the battery pack 8 and the front face of the restriction protrusion 261B abut It corresponds to the "first position". Further, when the pivoting portion 261 is urged clockwise by the spring 262 and the restricting projection 261b is exposed from the opening 24b of the grip portion 24B, the state of the pivoting portion 261 is the “first state” in the present invention. It corresponds to

In addition, when the rear surface of the upper portion of the battery pack 8 is in contact with the front surface of the restriction protrusion 261B, the contact between the terminal of the battery side terminal portion and the terminal of the battery connection terminal portion 27 is released. According to this, it is possible to suppress that the terminal is damaged by the vibration generated in the hammer drill main body 10.

The present invention has been described above based on the embodiments. The present embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to the combination of the respective constituent elements, and such modifications are also within the scope of the present invention.

A remaining amount display unit may be provided between the right side surface and the left side surface of the battery pack housing 81 in the left-right direction to display the remaining amount of the battery accommodated in the battery pack 8. According to such a configuration, the operator can easily grasp the replacement time of the battery pack visually.

In the present embodiment, although the hammer drill 1 has been described as an example, the present invention is also applicable to a power tool driven by power supply from a battery pack other than the hammer drill, and in particular, an electric motor such as a vibration drill or saver saw. The present invention is suitable for an electric power tool that easily generates vibrations in the tool body.

DESCRIPTION OF SYMBOLS 1 ... Hammer drill 2 ... Housing 3 ... Motor 4 ... Inverter circuit board part 5 ... Control part 6 ... Power transmission part 7 ... Output part 8 ... Battery pack 10 ... Hammer drill main body

Claims (15)

A main body having a motor, a drive portion driven by the motor, and a tool side terminal portion electrically connected to the motor;
It is an electric tool provided with the battery pack which has the battery used as the drive power supply of the said motor, and the battery side terminal part electrically connected with the said battery,
The body is
A guide portion which is engageable with the battery pack and guides relative movement with respect to the main body between a second position and a third position via the first position of the battery pack in a state of being engaged with the battery pack; ,
A first restricting portion that restricts movement of the battery pack from the second position guided by the guide portion toward the third position when the battery pack is positioned at the second position;
A first state for restricting the movement of the battery pack from the first position to the third position and permitting movement from the first position to the second position, and the first state from the first position of the battery pack And a second restricting portion capable of changing between a second state permitting movement toward the third position, and
The battery pack is configured to be capable of releasing the engagement between the battery pack and the guide portion by moving the battery pack in a direction to be separated from the main body while being guided by the guide portion. Power tools. In the process of the relative movement, when the battery pack goes from the third position to the second position, the second position is changed by the first position after the second position is changed to the first state. The electric power tool according to claim 1, wherein the movement from the second direction to the third position is restricted. The battery pack includes an engagement member engaged with the first regulation portion, and a battery side operation portion capable of releasing the engagement between the first regulation portion and the engagement member by being operated from the outside. Further comprising a locking portion provided with
The movement of the battery pack from the second position to the third position is restricted by engagement between the first restricting portion and the engagement member.
The second restricting portion has a tool side operation portion operable from the outside;
When the battery pack is positioned at the second position, the battery side operation unit is operated to restrict the movement of the battery pack from the second position to the third position by the first restricting portion. It is possible to move the battery pack to the third position by changing the second restricting portion to the second state by being released and operating the tool side operation portion. The electric power tool according to claim 1 or 2, characterized in that. When the battery pack is positioned at the second position, the battery side operation unit is operated to restrict the movement of the battery pack from the second position to the third position by the first restricting portion. It is possible that the battery pack can be moved to the third position only when the second regulation unit is changed to the second state by being released and operating the tool side operation unit. The power tool according to claim 3, characterized in that: The main body is provided with an elastic body,
The electric power tool according to claim 4, wherein the first restricting portion and the engagement member are engaged in a state where the elastic body is compressed. The main body further includes a handle portion that an operator grips,
The power tool according to claim 5, wherein the second restricting portion is provided on the handle portion. The battery pack further has a housing,
When the battery pack is positioned at the second position, the battery side operation unit is positioned on the opposite side of the elastic member with respect to the guide unit.
The electric tool according to claim 6, wherein the tool side operation portion is provided at an end portion of the handle portion adjacent to the battery side operation portion when the battery pack is positioned at the second position. tool. The housing extends in a predetermined direction,
The housing has a first wall and a second wall opposite to each other with respect to the battery in a direction orthogonal to the predetermined direction.
The battery side operation unit includes a first battery side operation unit and a second battery side operation unit.
The first battery side operation portion is provided on the first wall portion, and the second battery side operation portion is provided on the second wall portion.
The power tool according to claim 7, wherein the tool side operation portion is provided between the first wall portion and the second wall portion in a direction orthogonal to the predetermined direction. In the housing, a remaining amount display unit for displaying the remaining amount of the battery is provided between the first wall portion and the second wall portion in a direction orthogonal to the predetermined direction. The power tool according to claim 8, characterized in that: The second restricting portion is provided with a contact portion that contacts the housing,
The movement from the first position to the third position of the battery pack is restricted by the contact between the battery pack and the contact portion. Power tools. The battery pack has a guided portion engaged with the guide portion,
By sliding the guided portion with respect to the guide portion in a state in which the guide portion and the guided portion are in engagement with the battery pack, both the battery side operation portion and the tool side operation portion are operated. The electric power tool according to any one of claims 3 to 10, wherein the electric power tool can be moved to the second position without. In the second position, the battery side terminal portion and the tool side terminal portion are in contact with each other,
The electric power tool according to any one of claims 1 to 11, wherein the battery side terminal portion and the tool side terminal portion are separated at the first position. The motor has a rotating shaft,
The drive unit is configured to be able to detach a tip tool,
It is possible to transmit the rotational motion of the rotary shaft and rotate the tip tool in a rotational direction about an axis extending in a predetermined direction, and convert the rotational motion of the rotary shaft into a reciprocating motion to convert the tip tool into the predetermined The electric power tool according to any one of claims 1 to 12, further comprising a power transmission unit capable of reciprocating in a direction. A body having a motor and a drive driven by the motor;
A battery pack mounted on the main body;
The main body includes a first restricting portion and a second restricting portion that restricts the battery pack from being detached.
The battery pack includes a battery side operation unit that is released from the regulation of the first regulation unit by being operated from the outside.
The main body has a tool side operation unit which is released from the regulation of the second regulation unit by being operated from the outside,
An electric power tool characterized in that the main body is disengaged from the battery pack only when the battery side operation unit is operated and the tool side operation unit is operated. A body having a motor and a drive driven by the motor;
A battery pack mounted on the main body;
The main body includes a first restricting portion and a second restricting portion that restricts the battery pack from being detached.
The battery pack includes a battery side operation unit that is released from the regulation of the first regulation unit by being operated from the outside.
The main body includes a handle portion gripped by an operator, and a tool side operation portion provided on the handle portion and released from the outside by being operated from the outside.
The tool side operation portion is provided at an end portion of the handle portion adjacent to the battery side operation portion,
The power tool according to claim 1, wherein the battery side operation unit is provided adjacent to an end of the handle unit.

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