JP6844700B2 - Electric tool - Google Patents

Description

The present invention relates to a power tool.

Conventionally, an electric tool that forms a hole in a work material (for example, concrete, steel, wood, etc.) by rotating the tip tool by driving a motor, or crushes by applying a striking force to the tip tool. Is widely known.

In such a power tool, it is conceivable to use a battery pack to supply electric power to the motor, but there is a possibility that the battery pack may fall off from the power tool body due to the generation of vibration during work.

For example, Patent Document 1 discloses a hammer drill in which a holding band made of an elastic material is provided separately from the power tool main 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 fixed to the housing and a free end on the other end detachably attached to a locking portion formed in the housing.

Japanese Unexamined Patent Publication No. 2011-136407

However, in the hammer drill described in Patent Document 1, since a holding band for preventing the battery pack from falling off is provided separately from the main body and the battery pack, there is a possibility that an increase in the number of parts may lead to an increase in cost. Further, in order to fix the holding band, the operator has to perform the work of locking the free end of the holding band to the housing by himself / herself, which is troublesome.

Therefore, an object of the present invention is to provide an electric tool capable of easily preventing the battery pack from falling off from the electric tool main body.

In order to solve the above problems, the present invention comprises a main body having a motor, a drive unit driven by the motor, a tool-side terminal unit electrically connected to the motor, and a drive power source for 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 is A guide portion that guides the relative movement of the battery pack between the second position and the third position via the first position of the battery pack with respect to the main body while engaged with the pack, and the battery pack are located at the second position. In the case, the first regulating unit that regulates the movement from the second position guided by the guide portion of the battery pack to the third position, and the first regulating unit that regulates the movement from the first position to the third position of the battery pack. A first state that restricts movement and allows movement from the first position to the second position, and a second state that allows movement of the battery pack from the first position to the third position. The battery pack has a second regulating portion that can be changed between the two, and the battery pack is guided by the guide portion and moved in a direction in which the battery pack is separated from the main body, thereby causing the battery pack and the guide portion. Provided is an electric tool characterized by being configured to be disengaged.

In the power tool having the above configuration, even when the restriction on the movement in the direction from the second position to the third position by the first regulation unit is lifted, the second regulation unit releases the restriction in the direction from the first position to the third position. Since the movement is restricted, it is possible to easily prevent the battery pack from falling off from the power tool body. Further, since the second regulation portion is provided on the power tool main body, it is possible to suppress an increase in cost due to an increase in the number of parts.

In the above configuration, in the process of the relative movement, when the battery pack moves from the third position to the second position, after the second regulation unit is in the first state, the first regulation unit causes the battery pack. It is preferable that the movement from the second position to the third position is restricted.

According to such a configuration, it is possible to easily prevent the battery pack from falling off from the power tool main body.

Further, the battery pack has an engaging member that engages with the first regulating portion and a battery-side operating portion that can disengage the engaging member between the first regulating portion and the engaging member by being operated from the outside. Further, the first restricting portion and the engaging member engage with each other to restrict the movement of the battery pack from the second position to the third position. The second regulation unit has a tool-side operation unit that can be operated from the outside, and when the battery pack is located at the second position, the battery-side operation unit is operated to perform the first operation unit. The restriction on the movement of the battery pack from the second position to the third position by the regulation unit is released, and the second regulation unit changes to the second state by operating the tool-side operation unit. By doing so, it is preferable that the battery pack can be moved to the third position.

According to such a configuration, 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 first regulation unit is released, and the tool side operation unit is operated. By doing so, the second regulation part changes to the second state, and the battery pack can be moved to the third position. Therefore, the battery pack unintentionally falls off from the power tool body. It is possible to suppress the storage.

Further, when the battery pack is located at the second position, the operation of the battery-side operation unit causes the first regulation unit to move the battery pack from the second position to the third position. It is possible to move the battery pack to the third position only when the regulation is released and the second regulation unit changes to the second state by operating the tool-side operation unit. Is preferable.

According to such a configuration, 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 first regulation unit is released, and the tool side operation unit is operated. Since the battery pack can be moved to the third position only when the second regulation part changes to the second state, the battery pack unintentionally falls off from the power tool body. It is possible to prevent this from happening.

Further, it is preferable that the main body is provided with an elastic body, and the first regulating portion and the engaging member are engaged with each other in a compressed state.

According to such a configuration, since the first regulating member and the engaging member are engaged in a state where the elastic body is compressed, the elastic force of the elastic body is more suitable for the relative of the power tool body and the battery pack. The battery pack can be attached to the power tool body in a state where movement is suppressed.

Further, it is preferable that the main body further has a handle portion gripped by the operator, and the second regulating portion is provided on the handle portion.

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

The battery pack further has a housing, and the battery-side operating portion is located on the side opposite to the elastic body with respect to the guide portion when the battery pack is located at the second position, and the tool. When the battery pack is located at the second position, the side operating portion is preferably provided at the end of the handle portion adjacent to the battery side operating portion.

According to such a configuration, the tool-side operation unit is provided on the rear side of the battery pack, and when the battery pack is located at the second position, the battery-side operation unit is positioned so as to be adjacent to the tool-side operation unit. doing. That is, since the battery-side operation unit and the tool-side operation unit are collectively arranged on the rear side of the battery pack, the operability of the operator with respect to the battery-side operation unit and the tool-side operation unit is improved.

Further, the housing extends in a predetermined direction, and the housing has a first wall portion and a second wall portion located on opposite sides of 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 unit is provided on the first wall portion, and the second battery-side operation unit is provided. Is preferably provided on the second wall portion.

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

Further, it is preferable that 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.

According to such a configuration, for example, the operation unit on the battery side can be operated with the thumb and the middle finger, and the operation unit on the tool side can be operated with the index finger. Therefore, the operation unit on the battery side and the tool side of the operator can be operated. The operability for the operation unit is improved.

Further, the housing is provided with a remaining amount display unit 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 preferable.

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

The second regulating portion is provided with a contact portion that comes into contact with the housing, and the contact portion between the battery pack and the contact portion causes the battery pack to move from the first position to the third position. It is preferable to be regulated.

According to such a configuration, it is possible to easily prevent the battery pack from falling off from the power tool main body.

Further, the battery pack has a guided portion that engages with the guide portion, and the guided portion is slid against the guide portion while the guide portion and the guided portion are engaged with the battery pack. By moving it, it is preferable that it is possible to move to the second position without operating either the battery-side operation unit or the tool-side operation unit.

According to such a configuration, the battery pack can be easily attached to the power tool main body, and the battery pack can be easily prevented from falling off from the power tool main body.

Further, 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. It is preferable to have.

With such a configuration, it is possible to prevent the terminals from being damaged by vibration.

Further, the motor has a rotation shaft, and the drive unit is configured so that the tip tool can be attached and detached, and transmits the rotational movement of the rotation shaft in the rotation direction around an axis extending the tip tool in a predetermined direction. It is preferable to further have a power transmission unit capable of rotating and converting the rotational motion of the rotating shaft into 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 rotating shaft and rotate the tip tool in the rotational direction around the axis extending in a predetermined direction, and the rotational motion of the rotating shaft is converted into a reciprocating motion to convert the tip. In a power tool such as a hammer drill having a power transmission unit capable of reciprocating the tool in a predetermined direction, it is possible to easily prevent the battery pack from falling off from the power tool body.
The present invention further includes a main body having a motor, a drive unit driven by the motor, a tool-side terminal unit electrically connected to the motor, a battery serving as a drive power source for the motor, and the battery. An electric tool including a battery pack having a battery-side terminal portion electrically connected to the battery pack, the main body of which is engageable with the battery pack, and in a state of being engaged with the battery pack. A guide unit that guides the relative movement of the battery pack between the second position and the third position via the first position with respect to the main body.
When the battery pack is located at the second position, the first regulating unit that regulates the movement from the second position guided by the guide portion of the battery pack to the third position, and the battery pack. A first state that regulates the movement guided by the guide portion from the first position to the third position and allows the movement guided by the guide portion from the first position to the second position. The battery side has a second regulating portion that can be changed between a second state that allows movement from the first position guided by the guide portion of the battery pack to the third position, and a second regulating portion that can be changed between the first position and the third position. The terminal portion comes into contact with the tool-side terminal portion at the second position, is separated from the tool-side terminal portion at the first position, and is separated from the tool-side terminal portion at the third position than the first position. The battery pack is configured so that the engagement between the battery pack and the guide portion can be disengaged by moving the battery pack in a direction of detaching the battery pack from the main body while being guided by the guide portion. Provide a characteristic power tool.
The present invention further comprises a main body having a motor, a drive unit driven by the motor, a tool-side terminal unit electrically connected to the motor, a battery serving as a drive power source for the motor, and the battery. An electric tool including a battery pack having a battery-side terminal portion electrically connected to the battery pack, and the main body thereof is in a state of being able to engage with the battery pack and engaging with the battery pack. A guide portion that guides the relative movement of the battery pack between the second position and the third position via the first position with respect to the main body, and the battery pack when the battery pack is located at the second position. The first regulating unit that regulates the movement from the second position to the third position guided by the guide portion, and the battery pack that regulates the movement from the first position to the third position and said. A second state that is variable between a first state that allows movement from the first position to the second position and a second state that allows movement of the battery pack from the first position to the third position. The battery-side terminal portion has two regulation portions, and the battery-side terminal portion comes into contact with the tool-side terminal portion at the second position, is separated from the tool-side terminal portion at the first position, and is separated from the tool-side terminal portion at the third position. The battery pack and the guide portion are separated from the first position by moving the battery pack away from the main body while being guided by the guide portion. In the process of the relative movement, the battery pack is configured to be disengaged, and when the battery pack moves from the third position to the second position, after the second regulating portion is in the first state, the said Provided is an electric tool characterized in that movement from the second position to the third position is regulated by the first regulation unit.
The present invention further comprises a main body having a motor, a drive unit driven by the motor, a tool-side terminal unit electrically connected to the motor, a battery serving as a drive power source for the motor, and the battery. An electric tool including a battery pack having a battery-side terminal portion electrically connected to the battery pack, and the main body thereof can be engaged with the battery pack and is engaged with the battery pack. A guide portion that guides the relative movement of the battery pack between the second position and the third position via the first position with respect to the main body, and the battery pack when the battery pack is located at the second position. The first regulating unit that regulates the movement from the second position to the third position guided by the guide unit, and the battery pack that regulates the movement from the first position to the third position and said. A second state that is variable between a first state that allows movement from the first position to the second position and a second state that allows movement of the battery pack from the first position to the third position. The battery-side terminal portion has two regulation portions, and the battery-side terminal portion comes into contact with the tool-side terminal portion at the second position, is separated from the tool-side terminal portion at the first position, and is separated from the tool-side terminal portion at the third position. The battery pack and the guide portion are separated from the first position by moving the battery pack in a direction of being separated from the main body while being guided by the guide portion. The battery pack is configured to be disengageable, and the battery pack is disengaged from the engaging member that engages with the first regulating portion and the engaging member by being operated from the outside. It has a locking portion provided with a possible battery-side operating portion and a guided portion that engages with the guide portion, and the second regulating portion controls the second regulating portion by being operated from the outside. Having a tool-side operating portion that changes from one state to the second state, and sliding the guided portion with respect to the guide portion in a state where the guide portion and the guided portion are engaged with the battery pack. The present invention provides an electric tool characterized in that it can be moved to the second position without operating either the battery-side operation unit or the tool-side operation unit.
The present invention is further an electric tool including a main body having a motor, a drive unit driven by the motor, and a battery pack attached to the main body, wherein the main body is the battery pack. It has a first regulation part and a second regulation part that regulate so as not to be separated, and the battery pack of the first regulation part is operated from the outside against the urging force of the first urging member. It has a battery-side operation unit whose regulation is released, and the main body is operated from the outside against the urging force of the second urging member, so that the regulation of the second regulation unit is released on the tool side. The main body has an operation unit, and the main body is characterized in that the engagement with the battery pack is released only when the battery side operation unit is operated and the tool side operation unit is operated. Provide power tools.
The present invention further comprises an electric tool including a main body having a motor, a drive unit driven by the motor, and a battery pack attached to the main body, wherein the main body is the battery pack. It has a first regulation part and a second regulation part that regulate so as not to be separated, and the battery pack has a battery side operation part in which the regulation of the first regulation part is released by being operated from the outside. The main body has a handle portion that has a shape extending in the vertical direction and is gripped by an operator, and a tool-side operation portion that is provided on the handle portion and is operated from the outside to release the regulation of the second regulation portion. The handle portion has a motor operating portion that can be operated by an operator to control the start and stop of the motor, the battery pack is attached to the lower end portion, and the tool-side operating portion is the upper and lower parts. The lower end portion of the handle portion adjacent to the battery side operation portion is provided so as to be located below the motor operation portion in the direction, and the battery side operation portion is provided at the lower end portion of the handle portion. The tool-side operation unit and the battery-side operation unit are provided adjacent to each other in a state where both the first regulation unit and the second regulation unit restrict the detachment of the battery pack from the main body. Also provides a power tool characterized in that it is visible and at the same time the regulation can be lifted.

According to the power tool of the present invention, it is possible to easily prevent the battery pack from falling off from the power tool body.

It is a figure which shows the internal structure of the hammer drill main body which concerns on embodiment of this invention. The state in which the battery pack is attached to the hammer drill body is shown. It is a figure which shows the internal structure of the hammer drill main body which concerns on embodiment of this invention. It is an enlarged perspective view which shows the guide part of the hammer drill main body which concerns on embodiment of this invention. It is a side view which shows the relationship between the hammer drill main body and the battery pack when the battery pack is detached from the hammer drill main body with respect to the hammer drill which concerns on embodiment of this invention. It is a side view which shows the relationship between the hammer drill main body and the battery pack when the battery pack is attached to the hammer drill main body with respect to the hammer drill which concerns on embodiment of this invention.

The hammer drill 1 which is an example of the power tool according to the 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 hole in a work material (for example, concrete, steel, wood, etc.) or crushing it by applying a striking force.

In the following description, "up" shown in FIG. 1 is defined as an upward direction, "down" is defined as a downward direction, "front" is defined as a forward direction, and "rear" is defined as a backward direction. Further, when the hammer drill 1 is viewed from the rear, "right" is defined as the right direction, and "left" is defined as the left direction. When the dimensions, numerical values, etc. are referred to in the present specification, not only the dimensions and numerical values that completely match the dimensions, numerical values, etc., but also the dimensions, numerical values, etc. that substantially match (for example, when it is within the range of manufacturing error). ) Shall be included. Similarly for "identical", "orthogonal", "parallel", "match", "plane", etc., "substantially identical", "substantially orthogonal", "substantially parallel", "substantially match", "substantially flush", etc. Etc. shall be included.

As shown in FIG. 1, the hammer drill 1 has a hammer drill main body 10 and a battery pack 8. Further, 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. 2, an engaging portion 25 and a regulating portion. 26, it mainly has a battery connection terminal portion 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 houses 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 in the vertical direction and is rotatably supported by the housing 2. A pinion 31A that rotates integrally with the rotating shaft 31 is fixed to the upper end of the rotating 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 peripheral 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 portion 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. The substrate 40 has an inverter circuit (not shown) for supplying electric 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 rotation position of the rotor 32. ) Etc. are implemented.

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

The power transmission unit 6 has a power conversion mechanism 61 and a rotational force transmission mechanism 62, and can convert the rotation of the rotation shaft 31 of the motor 3 into reciprocating motion and transmit it to the output unit 7, and the motor 3 The rotation of the rotating 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 arranged above the rotational force transmission mechanism 62 in the gear housing 22. The output unit 7 has a hammer 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 “driving unit” in the present invention. The tip tool P is an example of the "tip tool" in the present invention.

The striking element 71 is configured to be reciprocating by a power conversion mechanism 61. The front end of the striking tool 71 is configured to be able to come into contact with the rear end of the tip tool P mounted on the tool holding portion 73, and as the striking tool 71 reciprocates in the front-rear direction, the tip tool P moves in the front-rear direction. It can move back and forth.

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 transmission 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. 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 arranged so as to cover the rear portions of the motor housing 21 and the gear housing 22. The back cover 23 is provided with an insertion portion 23A and a connection portion 23B.

The insertion portion 23A projects rearward below the back cover 23. A through hole penetrating in the left-right direction is formed in the insertion portion 23A.

The connecting portion 23B 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 plate-shaped 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 has a substantially U-shaped side view and is located behind the back cover 23. The handle housing 24 is configured as a divided housing divided by a divided surface (virtual surface) that passes through the center of the housing 2 in the left-right direction and is orthogonal to the left-right direction. , It is configured substantially symmetrically with respect to the dividing surface. 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 grip portion 24B is a portion gripped by an operator during work 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 upper part of the front portion of the grip portion 24B. At the lower part 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 portion of the grip portion 24B. The grip portion 24B is an example of the "handle portion" in the present invention.

The first connecting portion 24C extends forward from the lower end portion of the grip portion 24B. A shaft 24E extending in the left-right direction is provided inside the front portion of the first connecting portion 24C. The shaft 24E is inserted into the through hole of the insertion portion 23A. The handle housing 24 is configured to be rotatable around the shaft 24E as a fulcrum.

The second connecting portion 24D extends forward from the upper end portion of the grip portion 24B. The second connection portion 24D is provided with a vibration reduction mechanism 2B, 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 includes an elastic body (not shown). Even when vibration in the axis A direction occurs in the output unit 7, the handle housing 24 rotates around the shaft 24E, and the elastic body (not shown) of the vibration reduction mechanism 2B expands and contracts, so that the vibration in the axis A direction vibrates. Is absorbed, and the vibration in the axis A direction is reduced from being transmitted to the operator who grips the grip portion 24B.

The extending portion 24F is provided so as to extend downward from the front end portion of the first connecting portion 24C.

As shown in FIG. 2, the engaging portion 25 is provided below the first connecting portion 24C 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 portion 25C. The engaging portion 25 is provided substantially symmetrically with respect to the divided surface of the handle housing 24. As described above, the divided surface is a surface that divides the handle housing 24 into a left side portion and a right side portion.

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

The guide rail 25A projects 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 of the guide rail 25A and projects inward in the left-right direction from the guide rail 25A. The locking projection 25B is an example of the "first regulatory unit" in the present invention.

As shown in FIG. 2, the battery connection terminal portion 27 is provided below the first connection portion 24C. 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 27 is electrically connected to the motor 3, the control 5, and the like. The battery connection terminal portion 27 has a plurality of terminals. The battery connection terminal portion 27 is an example of the “tool side terminal portion” in the present invention.

As shown in FIGS. 1 and 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 projects rearward from the rear surface of the extending portion 24F. The elastic body 28 is an example of the “elastic body” in the present invention.

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

The rotating portion 261 has an operating protrusion 261A, a regulating protrusion 261B, and a rotating main body portion 261C. The rotating portion 261 is an example of the "second regulating portion" in the present invention.

The rotating main body 261C extends in the vertical direction while being urged by the spring 262. Although not shown in the figure, a through hole penetrating in the left-right direction is formed in the upper part of the rotating main body portion 261C, and a shaft 24G provided at the lower end portion of the grip portion 24B of the handle housing 24 is formed in the through hole. By being inserted, the rotating portion 261 is configured to be rotatable around the shaft 24G as a fulcrum.

The operation protrusion 261A is provided integrally with the rotating main body 261C at the upper part of the rotating main body 261C. The operation protrusion 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 regulation protrusion 261B is provided integrally with the rotating main body portion 261C at the lower part of the rotating main body portion 261C. The regulation protrusion 261B is exposed to the outside of the grip portion 24B through the opening 24b of the handle housing 24. Further, when the rotating portion 261 rotates with the shaft 24G as a fulcrum, the regulating projection 261B is configured to pass slightly inside the surface forming the front portion of the opening 24b (FIG. 4 (a). )reference).

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

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 attached to the hammer drill main body 10, and the description will be given below based on the state in which the battery pack 8 is attached to the hammer drill main body 10 unless otherwise specified. 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 forming an outer shell thereof, a guided portion 82, and a locking member 83. The battery pack 8 is configured substantially symmetrically with respect to the divided 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 houses a secondary battery (not shown). Further, although not shown in the figure, a battery-side terminal portion that is electrically connected to the secondary battery and has a plurality of terminals is provided on the upper portion of the front portion of the battery pack housing 81. In the present embodiment, when the battery pack 8 is attached to the hammer drill main body 10, the terminals of the battery side terminal portion and the terminals of the battery connection terminal portion come into contact with each other, whereby power is supplied to the motor 3, the control unit 5, and the like. It is configured to be available for supply. The rear surface of the upper portion of the battery pack housing 81 faces the front surface of the regulation protrusion 261B in the front-rear direction. Further, 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. Further, the battery pack housing 81 has a right side surface and a left side surface (not shown) 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-back 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 upper portion of the front portion of the battery pack 8. The guided portion 82 has a wall portion 82A and a rib portion 82B. The guided portion 82 is an example of the “guided portion” in the present invention.

The wall portion 82A extends in the front-rear direction. An 82a penetrating in the left-right direction is formed at the rear portion of the wall portion 82A.

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

The locking member 83 is provided on the upper portion of the battery pack 8 and has a locking claw 83A and a pressed portion 83B. The locking member 83 is configured substantially symmetrically with respect to the divided surface (virtual surface) of the handle housing 24, and the locking member 83 located on the right side and the left side is attached to the outside in the left-right direction by an urging member (not shown). It is being pushed. 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 portion of the locking member 83, and has a hook shape in which the tip thereof projects 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 side opposite to the elastic body 28 with respect to the guide rail 25A. The pressed portion 83B is located at the rear portion of the locking member 83, and is located outside the protruding end (tip portion) of the corresponding locking claw 83A in the left-right direction. As shown in FIG. 1, the pressed portion 83B is adjacent to the lower end portion of the grip portion 24B. The pressed portion 83B is an example of the “battery-side operating portion” in the present invention. The pressed portion 83B located on the right side is an example of the "first battery side operating portion" in the present invention. The pressed portion 83B located on the left side is an example of the "second battery side operating portion" in the present invention.

Further, the regulating 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, it is possible to operate the operation protrusion 261A with the index finger while operating the pressed portion 83B with the thumb and the middle finger, so that the operability of the operator with respect to the pressed portion 83B and the operation protrusion 261A is improved. To 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 portion 24B, the control unit 5 starts the drive control of the motor 3. When the drive control is started, the electric power of the secondary battery housed in the battery pack 8 is supplied to the motor 3, and the rotating shaft 31 rotates. The rotational force of the rotating shaft 31 is transmitted to the output unit 7 via the power transmission unit 6, and the tip tool P mounted on the tool holding unit 73 starts rotary reciprocating motion.

Here, as the work progresses, the power stored in the secondary battery in the battery pack 8 is consumed, so 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 housed in the battery pack 8 and the battery pack 8 is reattached to the hammer drill main 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 FIGS. 4 and 5 while referring to the effect of providing the regulation unit 26.

First, the operation of detaching 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 is inward in the left-right direction against the urging force of the urging member (not shown). Move to.

In this state, as shown in FIG. 4A, the operator moves the operation protrusion 261A of the regulation unit 26 downward. The rotating portion 261 rotates counterclockwise against the urging 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, and the regulation protrusion 261B is housed in the grip portion 24B. Will be done. In this case, since the lower end portion of the regulation protrusion 261B is configured to be rotatable above the upper surface position of the battery pack 8, the regulation portion 26 does not restrict the movement of the battery pack 8 to the rear. .. As described above, the state of the rotating portion 261 when the rotating portion 261 rotates in the counterclockwise direction and the regulation protrusion 261B is housed in the grip portion 24B corresponds to the "second state" of the present invention. ing.

As shown in FIG. 4B, when the operator slides the battery pack 8 backward while pressing the pressed portion 83B, the battery pack 8 moves the guide rail 25A of the engaging portion 25. It is moved backward relative to. As shown in FIG. 4C, when the front end portion of the rib portion 82B and the upper surface of the battery pack housing 81 are separated rearward from the guide rail 25A, the battery pack 8 is separated from the hammer drill main body 10. As shown in FIG. 4 (c), the rear surface of the upper portion of the battery pack housing 81 and the front surface of the regulation protrusion 261B do not face each other, and the battery pack 8 can be detached from the hammer drill main body 10. The position relative 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 portion) is also released when the battery pack 8 is slid and moved by a predetermined amount.

Here, in the present embodiment, when the rotating portion 261 rotates with the shaft 24G as a fulcrum, the regulation protrusion 261B is configured to pass slightly inside the surface forming the front portion of the opening 24b. Since 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 regulation protrusion 261B is housed in the grip portion 24B. Without it, the rear surface of the upper part of the battery pack 8 and the regulation protrusion 261B are in contact with each other and cannot be slid backward. That is, in the present embodiment, the operator must operate the pressed portion 83B and operate the operating protrusion 261A to rotate the rotating portion 261 so that the regulating protrusion 261B is accommodated in the grip portion 24B. Since the battery pack 8 cannot be slid backward with respect to the hammer drill main body 10, it is possible to prevent the battery pack 8 from being unintentionally dropped from the hammer drill main body 10.

Next, the operation of attaching the battery pack 8 to the hammer drill 1 will be described with reference to FIG. 5, referring to the effect of providing the regulation unit 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 sandwiched between the front end of the rib portion 82B and the upper surface of the battery pack housing 81. The battery pack 8 is inserted while sliding forward along the guide rail 25A.

At this time, as shown in FIG. 5B, the regulation protrusion 261B of the rotating portion 261 comes into contact with the upper portion of the battery pack 8 and is pushed forward. The rotating portion 261 rotates counterclockwise against the urging 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, since the regulating projection 261B of the rotating portion 261 is configured to be rotatable above the upper surface position of the battery pack 8, the battery pack 8 is restricted from moving forward by the regulating portion 26. There is nothing.

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

When the battery pack 8 is slid further forward as it is and the locking claw 83A passes through the locking projection 25B, the locking claw 83A is pushed outward in the left-right direction by the urging force of the urging member (not shown), and the locking projection Locked to 25B. When the locking claw 83A is locked with respect to the locking projection 25B, further forward movement of the battery pack 8 is restricted.

At this time, as shown in FIG. 5C, the elastic body 28 is compressed by the front surface of the battery pack housing 81. In this state, the battery pack 8 receives an elastic force from the elastic body 28 toward the rear, so that the locking projection 25B and the locking claw 83A are strongly meshed with each other. In this way, 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 either the operation protrusion 261A or the pressed portion 83B. It can be attached to the hammer drill 1. As shown in FIG. 5C, the relative position of the battery pack 8 with respect to the hammer drill 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 the mounting of the battery pack 8 on the hammer drill 1 is completed, the terminals of the battery side terminal portion and the terminals 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, in the past, there was a possibility that the battery pack was unintentionally released from being attached to the power tool body. In such a case, with the conventional power tool, there is a possibility that the battery pack may fall off from the power tool body during the work.

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 regulation protrusion 261B face each other in the front-rear direction, so that the battery pack 8 Even when the battery pack 8 unintentionally moves backward, the battery pack 8 and the regulation protrusion 261B come into contact with each other, and the battery pack 8 is preferably prevented from falling off from the hammer drill main body 10. Relative to the hammer drill body 10 of the battery pack 8 in a state where the battery pack 8 moves rearward from the state shown in FIG. 5 (c) and the rear surface of the upper portion of the battery pack 8 and the front surface of the regulation protrusion 261B are in contact with each other. Position corresponds to the "first position" in the present invention. Further, the state of the rotating portion 261 when the rotating portion 261 is urged in the clockwise direction by the spring 262 and the regulating protrusion 261b is exposed from the opening 24b of the grip portion 24B is the "first state" in the present invention. It corresponds to.

Further, when the rear surface of the upper portion of the battery pack 8 and the front surface of the regulation protrusion 261B are in contact with each other, 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 prevent the terminals from being 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 example, and it is understood by those skilled in the art that various modifications are possible for the combination of each of these components, and that such modifications are also within the scope of the present invention.

In the left-right direction, a remaining amount display unit for displaying the remaining amount of the battery housed in the battery pack 8 may be provided between the right side surface and the left side surface of the battery pack housing 81. With such a configuration, the operator can easily visually grasp the replacement time of the battery pack.

In the present embodiment, the hammer drill 1 has been described as an example, but the present invention can also be applied to a power tool driven by power supply from a battery pack other than the hammer drill, and in particular, an electric tool such as a vibration drill or a saver saw. It is suitable for power tools that easily generate vibration in the tool body.

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

Claims (14)

A main body having a motor, a drive unit driven by the motor, and a tool-side terminal unit electrically connected to the motor.
An electric tool comprising a battery serving as a driving power source for the motor and a battery pack having a battery-side terminal portion electrically connected to the battery.
The main body
With a guide portion that is engageable with the battery pack and 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 while engaged with the battery pack. ,
When the battery pack is located at the second position, a first regulating unit that regulates movement from the second position guided by the guide portion of the battery pack toward the third position, and a first regulating unit.
A second that regulates the movement guided by the guide portion from the first position to the third position of the battery pack and allows the movement guided by the guide portion from the first position to the second position. It has one state and a second regulation part that can be changed between a second state that allows movement from the first position guided by the guide part of the battery pack to the third position. ,
The battery-side terminal portion is in contact with the tool-side terminal portion at the second position, is separated from the tool-side terminal portion at the first position, and is separated from the tool-side terminal portion at the third position. More separated than
The battery pack is characterized in that the engagement between the battery pack and the guide portion can be disengaged by moving the battery pack in a direction of detaching the battery pack from the main body while being guided by the guide portion. Power tool to do. A main body having a motor, a drive unit driven by the motor, and a tool-side terminal unit electrically connected to the motor.
An electric tool comprising a battery serving as a driving power source for the motor and a battery pack having a battery-side terminal portion electrically connected to the battery.
The main body
With a guide portion that is engageable with the battery pack and 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 while engaged with the battery pack. ,
When the battery pack is located at the second position, a first regulating unit that regulates movement from the second position guided by the guide portion of the battery pack toward the third position, and a first regulating unit.
The first state of restricting the movement of the battery pack from the first position to the third position and allowing the movement of the battery pack from the first position to the second position, and the first state of the battery pack from the first position to the second position. It has a second state that allows movement towards a third position and a second regulatory unit that can change between.
The battery-side terminal portion is in contact with the tool-side terminal portion at the second position, is separated from the tool-side terminal portion at the first position, and is separated from the tool-side terminal portion at the third position. Separated from the part
The battery pack is configured so that the engagement between the battery pack and the guide portion can be disengaged by moving the battery pack in a direction of detaching the battery pack from the main body while being guided by the guide portion.
In the process of the relative movement, when the battery pack moves from the third position to the second position, after the second regulation unit is in the first state, the first regulation unit moves the battery pack to the second position. A power tool characterized in that movement from the third position to the third position is restricted. The battery pack includes an engaging member that engages with the first regulating portion, a battery-side operating portion that can disengage the first regulating portion from the engaging member by being operated from the outside, and the battery pack. Further has a locking portion provided with
By engaging the first regulating portion and the engaging member, the movement of the battery pack from the second position to the third position is restricted.
The second regulation unit has a tool-side operation unit that can be operated from the outside.
When the battery pack is located at the second position, the operation of the battery-side operation unit regulates the movement of the battery pack from the second position to the third position by the first regulation unit. It is possible to move the battery pack to the third position by releasing the battery pack and changing the second regulating unit to the second state by operating the tool-side operation unit. The power tool according to claim 1 or 2. When the battery pack is located at the second position, the operation of the battery-side operation unit regulates the movement of the battery pack from the second position to the third position by the first regulation unit. It is possible to move the battery pack to the third position only when the second regulating unit is changed to the second state by being released and the operation unit on the tool side is operated. The power tool according to claim 3. An elastic body is provided on the main body.
The power tool according to claim 4, wherein the first regulating portion and the engaging member are engaged in a compressed state of the elastic body. The main body further has a handle portion that the operator grips.
The power tool according to claim 5, wherein the second regulating portion is provided on the handle portion. The battery pack further comprises a housing.
The battery-side operation unit is located on the side opposite to the elastic body with respect to the guide unit when the battery pack is located at the second position.
The electric power according to claim 6, wherein the tool-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 located at the second position. tool. The housing extends in a predetermined direction
The housing has a first wall portion and a second wall portion located on opposite sides of 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 unit is provided on the first wall portion, and the second battery-side operation unit is provided on the second wall portion.
The power tool according to claim 7, wherein the tool-side operating portion is provided between the first wall portion and the second wall portion in a direction orthogonal to the predetermined direction. The housing is provided with a remaining amount display unit 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. The power tool according to claim 8. The second regulating portion is provided with a contact portion that comes into contact with the housing.
The invention according to any one of claims 7 to 9, wherein the movement of the battery pack from the first position to the third position is restricted by the contact between the battery pack and the contact portion. Power tools. A main body having a motor, a drive unit driven by the motor, and a tool-side terminal unit electrically connected to the motor.
An electric tool comprising a battery serving as a driving power source for the motor and a battery pack having a battery-side terminal portion electrically connected to the battery.
The main body
With a guide portion that is engageable with the battery pack and 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 while engaged with the battery pack. ,
When the battery pack is located at the second position, a first regulating unit that regulates movement from the second position guided by the guide portion of the battery pack toward the third position, and a first regulating unit.
The first state of restricting the movement of the battery pack from the first position to the third position and allowing the movement of the battery pack from the first position to the second position, and the first state of the battery pack from the first position to the second position. It has a second state that allows movement towards a third position and a second regulatory unit that can change between.
The battery-side terminal portion is in contact with the tool-side terminal portion at the second position, is separated from the tool-side terminal portion at the first position, and is separated from the tool-side terminal portion at the third position. Separated from the part
The battery pack is configured so that the engagement between the battery pack and the guide portion can be disengaged by moving the battery pack in a direction of detaching the battery pack from the main body while being guided by the guide portion.
The battery pack includes an engaging member that engages with the first regulating portion and a battery-side operating portion that can disengage the engaging member from the first regulating portion by being operated from the outside. It has a locking portion and a guided portion that engages with the guide portion.
The second regulation unit has a tool-side operation unit that changes the second regulation unit from the first state to the second state by being operated from the outside.
By sliding the guided portion with respect to the guide portion in a state where the guide portion and the guided portion are engaged with the battery pack, both the battery side operation portion and the tool side operation portion are operated. An electric tool characterized in that it can be moved to the second position without any need. The motor has a rotating shaft and
The drive unit is configured so that the tip tool can be attached and detached.
It is possible to transmit the rotational movement of the rotating shaft and rotate the tip tool in the rotational direction around an axis extending in a predetermined direction, and convert the rotational movement of the rotating shaft into a reciprocating motion to convert the tip tool into the predetermined one. The power tool according to any one of claims 1 to 11 , further comprising a power transmission unit capable of reciprocating in a direction. A main body having a motor and a drive unit driven by the motor,
An electric tool provided with a battery pack attached to the main body.
The main body has a first regulation part and a second regulation part that regulate the battery pack so that it does not come off.
The battery pack has a battery-side operation unit in which the regulation of the first regulation unit is released by being operated from the outside against the urging force of the first urging member.
The main body has a tool-side operating portion in which the regulation of the second regulating portion is released by being operated from the outside against the urging force of the second urging member.
The main body is an electric tool characterized in that the engagement with the battery pack is released only when the battery-side operation unit is operated and the tool-side operation unit is operated. A main body having a motor and a drive unit driven by the motor,
An electric tool provided with a battery pack attached to the main body.
The main body has a first regulation part and a second regulation part that regulate the battery pack so that it does not come off.
The battery pack has a battery-side operation unit whose regulation of the first regulation unit is released by being operated from the outside.
The main body has a handle portion that has a shape extending in the vertical direction and is gripped by an operator, and a tool-side operation portion that is provided on the handle portion and is operated from the outside to release the regulation of the second regulation portion. Have and
The handle portion has a motor operating portion that can be operated by an operator to control the start and stop of the motor, and the battery pack is attached to the lower end portion.
The tool-side operating portion is to be positioned on the lower side than the motor operating unit in the vertical direction, is provided on the lower end of the handle portion adjacent to the battery-side operating portion,
The battery-side operating portion is provided adjacent to the lower end of the handle portion,
The tool-side operation unit and the battery-side operation unit are both visible and simultaneously regulated in a state where both the first regulation unit and the second regulation unit restrict the detachment of the battery pack from the main body. electric tool, wherein releasable der Rukoto a.

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