Impact tool

Abstract

To provide an impact tool capable of obtaining a sufficient impact force from a tip tool while suppressing vibration of the impact tool.SOLUTION: An impact tool includes a motor having a motor shaft that rotates around a motor rotation axis, a striking mechanism that includes a cylinder and a striking element adjacent to an air chamber defined inside the cylinder and converts the rotational motion of the motor shaft into linear motion of the striking element along a predetermined striking axis by utilizing an air spring in the air chamber, a housing that has a front end including a tip surface to which a tool bit is attached and a rear end including a back surface opposite to the tip surface, and that houses the motor and the striking mechanism, and a handle configured to be gripped by a user. The motor rotation axis and the striking axis are parallel to each other. A rear end of the handle is disposed at the rear end.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a striking tool.

Background Art

[0002] There is known an electric tool including a motor driven by electric power supplied from a battery, a cam connected to a motor shaft, and a tip tool connected to the cam. For example, Patent Document 1 describes an electric tool that uses the driving force of a motor to rotate a cam and converts the rotational motion of the cam into a reciprocating motion of a tip tool.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional technology, since the driving force of the motor is mechanically converted into the reciprocating motion of the tip tool, the vibration of the electric tool may increase, and the striking force by the tip tool may not be sufficiently obtained.

Means for Solving the Problems

[0005] According to a first aspect of the present disclosure, a striking tool is provided. The striking tool includes a motor having a motor shaft that rotates about a motor rotation axis, a cylinder, and a striker adjacent to an air chamber defined inside the cylinder. Using the air spring of the air chamber, a striking mechanism that converts the rotational movement of the motor shaft into a linear movement of the striker along a predetermined striking axis, a front end portion including a front end face to which a tip tool is attached, a rear end portion including a rear face opposite to the front end face, a housing that houses the motor and the striking mechanism, and a handle configured to be gripped by a user. The motor rotation axis and the striking axis are parallel to each other. The rear end of the handle is disposed at the rear end portion.

[0006] According to the striking tool of the above aspect, with a striking mechanism that uses an air spring, it is possible to suppress vibration of the striking tool and transmit a large amount of kinetic energy to the tip tool as compared with a striking mechanism that mechanically transmits kinetic energy. Further, since the handle is disposed at the rear end portion of the housing, it is easy to apply a force to press the tip tool against a processing target along the striking axis, and it is possible to provide a striking tool having a high striking force by the tip tool.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0008] Hereinafter, representative and non-limiting specific examples of the present invention will be described in detail with reference to the drawings. This detailed description is merely intended to show those skilled in the art the details for implementing preferred examples of the present invention, and is not intended to limit the scope of the present invention. Further, the additional features and inventions disclosed below can be used separately or together with other features and inventions in order to provide further improved devices, their manufacturing methods, and usage methods.

[0009] Also, the combinations of features and steps disclosed in the following detailed description are not essential for implementing the present invention in the broadest sense, and are described only for the purpose of explaining representative specific examples of the present invention. Further, the various features of the above and below representative specific examples, as well as the various features described in the independent and dependent claims, do not have to be combined as described in the specific examples here or in the order listed when providing additional and useful embodiments of the present invention.

[0010] All features described in this specification and / or the claims are intended to be disclosed separately and independently of each other as limitations on the initial disclosure and the claimed specific matters, apart from the configurations of the features described in the embodiments and / or the claims. Further, all descriptions regarding numerical ranges and groups or populations are made with the intention of disclosing intermediate configurations as limitations on the initial disclosure and the claimed specific matters.

[0011] In one or more embodiments, the motor housing portion for housing the motor may be provided at the rear end portion. According to the impact tool of this embodiment, by disposing the motor at the rear end portion of the housing, the size in the direction intersecting the impact axis of the housing can be reduced.

[0012] In one or more embodiments, further, a battery mounting portion for detachably mounting a battery for supplying power for driving the motor to the motor may be provided. The impact axis may pass through the battery mounting portion. According to the impact tool of this embodiment, compared with the case where the battery mounting portion is provided on the side surface of the housing or the like, the size in the direction intersecting the impact axis of the housing can be reduced.

[0013] In one or more embodiments, the impact axis may pass through the motor. According to the impact tool of this embodiment, the size in the direction intersecting the impact axis of the housing can be reduced.

[0014] In one or more embodiments, the impact mechanism may include a motion conversion portion that converts the rotational motion of the motor shaft into the linear motion of the striker. The handle may be connected to the side surface of the housing. The handle may be disposed on the side opposite to the motion conversion portion with the impact axis interposed therebetween. According to the impact tool of this embodiment, by disposing the handle near the impact axis, it becomes easier to press the handle forward while gripping the handle. Therefore, it becomes easier for the user to perform an operation of pressing the tip tool against the object to be processed.

[0015] In one or more embodiments, in a plan view of viewing the impact tool along a direction orthogonal to the motor rotation axis and along a direction passing through the handle and the impact mechanism, at least a part of the handle may overlap at least a part of the impact mechanism. According to the impact tool of this form, by arranging the handle directly above the impact mechanism that is likely to become heavy, it is possible to provide an impact tool that is easy for the user to balance and has good operability for the user.

[0016] In one or more embodiments, the handle may include a rear connection portion that connects the rear end of the handle to the rear end portion, a front connection portion that connects the front end of the handle to the side surface of the housing, and a gripping portion that connects the rear connection portion and the front connection portion. According to the impact tool of this form, by configuring the handle and the housing in an annular shape, it is possible to provide an impact tool with good operability for the user.

[0017] In one or more embodiments, the gripping portion may be inclined with respect to the impact axis so as to move away from the impact axis as it goes from the rear end portion toward the tip surface. According to the impact tool of this form, it is possible to provide an impact tool that is easy to lift and that allows the tip tool to be easily pushed forward by operating the handle.

[0018] In one or more embodiments, the length of the gripping portion along the impact axis may be equal to or more than half of the length from the back surface to the tip surface in the housing. According to the impact tool of this form, it is possible to provide an impact tool that is easy for the user to balance and has good operability for the user.

[0019] In one or more embodiments, the handle may have a connection portion that connects the rear end of the handle to the rear end portion, and a gripping portion that extends from the connection portion along an extending direction that intersects the impact axis. The extending direction may be configured such that the direction component in the direction orthogonal to the impact axis is larger than the direction component in the direction along the impact axis. According to the impact tool of this form, the user can easily press the handle from the rear side while holding the handle, and can provide an impact tool with high workability.

[0020] In one or more embodiments, the front end of the handle may be spaced apart from the housing. The gripping portion may have a protruding portion that protrudes from the gripping portion along a protruding direction that intersects the extending direction. According to the impact tool of this form, the protruding portion can be supported while the gripping portion is being gripped, and an impact tool with good operability for the user can be provided.

[0021] In one or more embodiments, further, a battery mounting portion for detachably mounting a battery that supplies power for driving the motor may be provided at the rear end portion. The detaching and attaching direction of the battery in the battery mounting portion may be a direction that intersects the impact axis and passes through the handle. According to the impact tool of this form, the user can easily detach and attach the battery with the other hand even while holding the handle with one hand.

[0022] In one or more embodiments, further, a light emitting portion capable of irradiating light toward the work area may be provided. According to the impact tool of this form, the tip tool, the processing object, or the surrounding thereof can be illuminated, and the visibility of the work area by the impact tool can be improved.

[0023] A. First Embodiment: Hereinafter, with reference to the drawings, the impact tool 100 according to the first embodiment will be described. In this embodiment, as an example of the impact tool, an electric shovel will be used for the description. The electric shovel is a hand-held electric tool used for operations such as excavation and crushing of earth and sand, gravel, coal, snow, etc. The electric shovel is configured to be able to execute an operation (hereinafter, also referred to as a "hammer operation") of linearly reciprocating a shovel as a tip tool TT attached to the tip along a predetermined impact axis TX by utilizing the driving force of a motor. The uses of the shovel are, for example, for civil engineering, farming, or household use, etc. The shovel may also be called a "shovel" or a "scoop", etc. Note that, as will be described later, the impact tool 100 can also be appropriately adapted to operations other than excavation work, etc., by replacing the tip tool TT.

[0024] In this specification, for the convenience of explanation, the extending direction of the impact axis TX is defined as the "front-rear direction of the impact tool 100". In the front-rear direction, the tip surface 612 side where the tool holder 90 (see FIG. 3) is arranged is defined as the "front side of the impact tool 100", and the opposite side is defined as the "rear side of the impact tool 100". Also, the direction orthogonal to the impact axis TX and the shaft rotation axis SX (see FIG. 3) is defined as the "vertical direction of the impact tool 100". In the vertical direction, the direction from the shaft rotation axis SX toward the impact axis TX is defined as the upward direction, and the reverse direction is defined as the downward direction. Also, the direction orthogonal to the front-rear direction and the vertical direction is defined as the left-right direction.

[0025] The impact tool 100 includes a housing 60 and a handle 70 connected to the housing 60. The handle 70 is a part gripped by the user. The configuration of the handle 70 will be described later.

[0026] The housing 60 has a substantially cylindrical shape and is a long hollow casing extending along the striking axis TX. The housing 60 has a front end face 612 located on the front side of the housing 60, a rear face 622 opposite to the front end face 612, and a side face 64 between the front end face 612 and the rear face 622. The side face 64 is, for example, a portion of the outer surface of the housing 60 excluding the front end face 612 and the rear face 622. A battery BAT for supplying power to the motor 20 is disposed on the rear face 622. In the present disclosure, the battery BAT is a rechargeable battery having a well-known configuration.

[0027] FIG. 2 shows the striking tool 100 with the battery BAT removed. As shown in FIG. 2, a battery mounting portion 30 for mounting the battery BAT is provided on the rear face 622 of the housing 60. The battery mounting portion 30 has a guide rail 32, a terminal 34, and a side wall portion 36. The side wall portion 36 is a wall surface extending rearward from both the left and right sides and the lower side of the rear face 622. The guide rail 32 is formed in a convex shape along the vertical direction on the inner peripheral surface of the side wall portion 36. The guide rail 32 engages with a concave rail receiving portion (not shown) of the battery BAT. The guide rail 32 defines the attachment / detachment direction DB when the battery BAT is attached / detached. The battery BAT attached to the battery mounting portion 30 is electrically connected via the terminal 34, enabling power supply to the motor 20 and the like. The battery mounting portion 30 may further include a locking mechanism for restricting the detachment of the battery BAT.

[0028] As shown in FIG. 3, inside the housing 60, a motor 20, a striking mechanism 50, and a tool holder 90 are accommodated. The tool holder 90 detachably holds the tip tool TT in an insertion hole 92 provided at the front end portion 61 of the housing 60. The tool holder 90 is accommodated in the front end portion 61. The front end portion 61 includes a front end face 612. In the housing 60, the portion where the motor body 22 is disposed is also referred to as a "motor accommodation portion 624", and the portion where the striking mechanism 50 is disposed is also referred to as a "striking accommodation portion 63". In the housing 60, the portion located on the side opposite to the front end portion 61 and including the back face 622 and the motor accommodation portion 624 is also referred to as a rear end portion 62. In the present embodiment, the motor accommodation portion 624 and the rear end portion 62 coincide with each other.

[0029] In FIG. 3, for convenience of explanation, a striking tool 100 with the battery BAT removed is shown. The attachment / detachment direction DB of the battery BAT in the battery attachment portion 30 intersects the striking axis TX and is a direction passing through the handle 70. The "direction intersecting the striking axis TX and passing through the handle 70" includes a direction intersecting the striking axis TX and intersecting a straight line GD which is the extending direction of a grip portion 76 described later, and a direction DM which is orthogonal to the striking axis TX and passes through the handle 70 and the striking mechanism 50. In the example of FIG. 3, the attachment / detachment direction DB coincides with the vertical direction.

[0030] For example, the user can remove the battery BAT from the battery attachment portion 30 by sliding the battery BAT upward, that is, toward the handle 70 side, and pulling it out. Also, the user can attach the battery BAT to the battery attachment portion 30 by sliding the battery BAT downward along the guide rail 32. Since the attachment / detachment direction DB of the battery BAT is parallel to the direction toward the handle 70, the user can easily attach and detach the battery BAT with the other hand even while gripping the handle 70 with one hand.

[0031] The internal structure of the housing 60 will be described with reference to FIGS. 3 to 6. As shown in FIG. 3, among the housing 60, the motor housing portion 624 is provided at the rear end portion 62 of the housing 60. The motor 20 is driven by the electric power supplied from the battery BAT mounted on the battery mounting portion 30. In the present embodiment, for example, a brushed DC motor is adopted for the motor 20. The impact tool 100 of the present embodiment is not provided with a controller for driving and controlling the motor 20, and the housing 60 is downsized. As shown in FIG. 3, the motor 20 is disposed at a position where the impact axis TX passes through the motor 20. By disposing the motor rotation axis MX of the motor 20, which is the driving source of the hammer operation, and the impact axis TX of the tip tool TT relatively close to each other, the radial size of the impact tool 100 can be reduced.

[0032] As shown in FIG. 3, the motor 20 includes a motor body 22 including a stator and a rotor, and a motor shaft 24. The motor body 22 is fixed to the motor housing portion 624 of the rear end portion 62. The motor shaft 24 rotates about the motor rotation axis MX together with the rotor. The motor rotation axis MX is below the impact axis TX and parallel to the impact axis TX. The front end of the motor shaft 24 protrudes into the impact housing portion 63. A pinion gear 541 is provided at the front end of the motor shaft 24. Note that a fan for cooling the motor body 22 may be provided on the motor shaft 24.

[0033] The details of the impact mechanism 50 will be described with reference to FIGS. 4 to 6. As shown in FIG. 4, the impact mechanism 50 includes an impact portion 52 and a motion conversion portion 54. The motion conversion portion 54 transmits the kinetic energy of the rotational motion of the motor shaft 24 to the striker 524 and converts the rotational motion of the motor shaft 24 into a linear motion of the striker 524 along the impact axis TX. The impact portion 52 transmits the kinetic energy of the striker 524 to the tip tool TT.

[0034] The motion conversion unit 54 includes a pinion gear 541, an intermediate gear 542, an intermediate shaft 543, a transmission member 544, and a motion conversion member 546. The pinion gear 541 is provided at the front end of the motor shaft 24 that protrudes into the impact housing portion 63. The intermediate gear 542 is meshed with the pinion gear 541. The intermediate gear 542 is fixed to the rear end of the intermediate shaft 543. As a result, the rotation of the motor shaft 24 is transmitted to the intermediate shaft 543 via the pinion gear 541 and the intermediate gear 542 that are meshed with each other.

[0035] The intermediate shaft 543 transmits the kinetic energy transmitted from the motor 20 to the transmission member 544. The intermediate shaft 543 is rotatably supported around the shaft rotation axis SX by two bearings. The shaft rotation axis SX is below the motor rotation axis MX and parallel to the impact axis TX and the motor rotation axis MX. By shifting the axes parallel to each other vertically, the size of the axial direction of the impact tool 100, that is, the front-rear direction size of the impact tool 100 can be reduced.

[0036] The transmission member 544 transmits the rotational motion of the intermediate shaft 543 to the rotating body 546R of the motion conversion member 546. The transmission member 544 is connected to the intermediate shaft 543 and rotates around the shaft rotation axis SX together with the intermediate shaft 543. The transmission member 544 includes a transmission fitting portion 562 that can be fitted with a conversion fitting portion 564 of the motion conversion member 546, as will be described later.

[0037] The motion conversion member 546 is disposed on the intermediate shaft 543, converts the rotational motion of the intermediate shaft 543 into a linear motion, and transmits it to the striker 524. The motion conversion member 546 includes a rotating body 546R and a swing member 546S. The rotating body 546R is loosely fitted around the intermediate shaft 543 and is rotatably supported with respect to the intermediate shaft 543. The rotating body 546R includes a conversion fitting portion 564. When the conversion fitting portion 564 is fitted with the transmission fitting portion 562 of the transmission member 544, the rotational motion of the intermediate shaft 543 is transmitted to the rotating body 546R of the motion conversion member 546 via the transmission member 544.

[0038] The swing member 546S is rotatably attached to the rotating body 546R around the rotating body 546R. The swing member 546S has an arm portion 546A extending upward from the rotating body 546R. The swing member 546S swings along the front-rear direction, which is the extending direction of the shaft rotation axis SX, as the rotating body 546R rotates. The arm portion 546A transmits the swing of the swing member 546S to the piston 522.

[0039] The striking portion 52 includes a piston 522, a striker 524, and an impact bolt 526. The piston 522 is a bottomed cylindrical member. The piston 522 is slidably disposed in the cylinder 520 along the striking axis TX. The piston 522 is connected to the arm portion 546A of the swing member 546S via a connecting pin, and reciprocates in the front-rear direction as the swing member 546S swings.

[0040] The striker 524 applies a striking force to the tip tool TT. The striker 524 is slidably disposed in the cylinder 520 along the striking axis TX. An air chamber SP that functions as an air spring is defined between the bottom surface of the piston 522 and the striker 524 in the cylinder 520. The impact bolt 526 is an intermediate member that transmits the kinetic energy of the striker 524 to the tip tool TT. The impact bolt 526 is movably disposed along the striking axis TX in front of the striker 524.

[0041] As the swing member 546S swings and the piston 522 moves back and forth, the internal pressure of the air chamber SP fluctuates, and the striker 524 slides back and forth in the cylinder 520 by the action of the air spring. More specifically, when the piston 522 moves forward, the distance between the piston 522 and the striker 524 decreases. As a result, the air in the air chamber SP is compressed, and the internal pressure in the cylinder 520 increases. The striker 524 is pushed forward at high speed by the action of the air spring and strikes the impact bolt 526. The struck impact bolt 526 transmits the kinetic energy of the striker 524 to the tip tool TT. The tip tool TT, which has received the kinetic energy, is driven linearly along the impact axis TX. The impact tool 100 of the present embodiment can suppress the vibration of the impact tool 100 and transmit a large amount of kinetic energy to the tip tool TT as compared with the case of mechanically transmitting the kinetic energy to the tip tool TT by utilizing the action of the air spring.

[0042] When the piston 522 moves backward, the distance between the piston 522 and the striker 524 increases, and the air in the air chamber SP expands. As a result, the internal pressure in the cylinder 520 decreases, and the striker 524 is drawn backward. The struck tip tool TT contacts the workpiece to be machined and moves backward together with the impact bolt 526 due to the reaction force from the workpiece to be machined. Thereafter, similarly, the hammer operation by the striking mechanism 50 is repeated.

[0043] As shown in FIGS. 4 and 5, the impact tool 100 according to the present embodiment is provided with an anti - dry - fire mechanism 56. In the hammer operation, for example, when the tip tool TT is not pressed against the workpiece to be machined, that is, in a no - load state where no load is applied to the tip tool TT, it is preferable that the striker 524 does not strike the impact bolt 526. The anti - dry - fire mechanism 56 stops the striker 524 from striking the impact bolt 526 when it enters the no - load state.

[0044] The non - dry - fire prevention mechanism 56 includes a transmission fitting portion 562, a conversion fitting portion 564, a biasing member 566, and a connecting portion 568. The biasing member 566 is an elastic body such as a compression spring, for example. The biasing member 566 biases the front - end portion 61 including the tool holder 90, the impact bolt 526, and the striking unit UT to which the cylinder 520 is integrally connected in the forward direction. The connecting portion 568 is a member that connects the striking unit UT and the transmission member 544. The striking unit UT and the transmission member 544 are configured to be integrally slidable along the front - rear direction by the connecting portion 568.

[0045] FIG. 4 shows the non - dry - fire prevention mechanism 56 in a fitted state where the conversion fitting portion 564 and the transmission fitting portion 562 are fitted. In a load state where the tip tool TT is pressed against the object to be processed with a force stronger than the biasing force of the biasing member 566, the striking unit UT and the transmission member 544 are pushed backward. As a result, the conversion fitting portion 564 and the transmission fitting portion 562 are fitted, and the non - dry - fire prevention mechanism 56 is switched to the fitted state.

[0046] FIG. 5 shows the non - dry - fire prevention mechanism 56 in a non - fitted state. In a no - load state where the biasing force of the biasing member 566 is stronger than the force pressing the tip tool TT, the striking unit UT and the transmission member 544 are biased forward by the biasing member 566. The non - dry - fire prevention mechanism 56 is switched to a non - fitted state where the conversion fitting portion 564 and the transmission fitting portion 562 are separated and do not fit with each other. As a result, the rotation of the intermediate shaft 543 is not transmitted to the motion conversion member 546, and the piston 522 does not reciprocate. Therefore, the impact of the striker 524 on the impact bolt 526 is prevented. As shown in FIGS. 4 and 5, when the position of the front - end face 612 of the housing 60 in the fitted state is “front - end position 612B”, the position of the front - end face 612 of the housing 60 in the non - fitted state is the front - end position 612F which is in front of the front - end position 612B.

[0047] As shown in FIGS. 4 and 6, the impact tool 100 according to the present embodiment is provided with a rotation restricting mechanism 58. A shovel as the tip tool TT is generally used for excavation work. When the tip tool TT rotates around the impact axis TX during excavation work, the working efficiency of the impact tool 100 may decrease. The rotation restricting mechanism 58 restricts the tool holder 90 and the tip tool TT from rotating around the impact axis TX with respect to the housing 60. By configuring in this way, it is possible to suppress or prevent the tip tool TT from being damaged by rotating around the impact axis TX.

[0048] The rotation restricting mechanism 58 includes a rail portion 582 and a groove portion 584. The rail portion 582 is provided on the outer periphery of the cylinder 520 and is a member that protrudes outward from the cylinder 520. The rail portion 582 has a substantially flat plate shape that is long along the front-rear direction. The groove portion 584 is provided on the inner peripheral surface of the housing 60 and is a recess that is long along the front-rear direction. The groove portion 584 has a shape corresponding to the rail portion 582, and the rail portion 582 is fitted into the groove portion 584. The length of the groove portion 584 in the front-rear direction is longer than the length of the rail portion 582 in the front-rear direction. As a result, the rail portion 582 can slide in the groove portion 584 in the front-rear direction. Also, the length of the groove portion 584 in the front-rear direction is configured to be equal to or greater than the distance from the tip position 612B to the tip position 612F described above. By configuring in this way, the impact unit UT can slide in the front-rear direction from the tip position 612B to the tip position 612F while being guided by the rail portion 582 and the groove portion 584.

[0049] As shown in FIG. 6, the cross-sectional width of the groove portion 584 is substantially the same as the cross-sectional width of the rail portion 582. By configuring in this way, rotation of the striking unit UT with respect to the housing 60 can be suppressed or prevented. That is, rotation of the tip tool TT with respect to the housing 60 about the striking axis TX can be suppressed. As shown in FIG. 6, in the present embodiment, an example in which nine rail portions 582 and nine groove portions 584 are provided respectively is shown. However, the rail portion 582 and the groove portion 584 may be singular, or may be any number of two or more.

[0050] The configuration of the handle 70 will be described with reference to FIGS. 7 and 8. As shown in FIG. 7, the handle 70 includes a rear connection portion 74, a front connection portion 72, and a grip portion 76 that connects the front connection portion 72 and the rear connection portion 74.

[0051] The rear connection portion 74 is a portion of the handle 70 that is connected to the rear end portion 62 of the housing 60. In the present embodiment, the rear end 70B of the rear connection portion 74 is substantially flush with the rear surface 622 of the housing 60. In the example of FIG. 7, the rear end of the handle 70 is the rear end of the housing 60 and substantially coincides with the rear end of the motor housing portion 624. In the example of FIG. 7, although the side wall portion 36 of the battery mounting portion 30 is not considered as a part of the housing 60, it may be considered as a part of the housing 60. In this case, for example, the top portion 36T of the side wall portion 36 and the rear end 70B of the rear connection portion 74 are configured to be flush. The rear connection portion 74 only needs to be connected to the rear end portion 62 of the housing 60. The rear connection portion 74 may be connected between the battery mounting portion 30 and the motor housing portion 624, or between the rear surface 622 and the motor housing portion 624 of the rear end portion 62. For example, the rear end 70B of the rear connection portion 74 does not have to be flush with the rear surface 622 or the top portion 36T, and may be disposed in the vicinity of the rear surface 622 or the top portion 36T.

[0052] The front connection portion 72 is a portion of the handle 70 that is connected to the side surface 64 of the housing 60. Specifically, the front connection portion 72 is connected to the front side along the striking axis TX with respect to the rear connection portion 74 on the side surface 64. In the example of FIG. 7, the front connection portion 72 is connected near the front end of the striking accommodation portion 63. Specifically, the front end 70F of the front connection portion 72 is located near the boundary between the front end portion 61 and the striking accommodation portion 63.

[0053] As described above, in the impact tool 100 of the present embodiment, the handle 70 has a substantially L-shaped configuration. The rear end of the handle 70 is disposed at the rear end portion 62 of the housing 60, and the front end of the handle 70 is disposed at the front side surface 64 of the housing 60. That is, by disposing the substantially L-shaped handle 70 above the housing 60, the handle 70 and the housing 60 form an annular outer appearance shape. By configuring the handle 70 and the housing 60 to be annular, the strength of the impact tool 100 can be improved, and it is easy for the user to grip the handle 70, thereby providing an impact tool 100 with suitable user operability. Further, by connecting the rear end of the handle 70 to the rear end portion 62 of the housing 60 and connecting the front end of the handle 70 near the front end portion 61 of the housing 60, it becomes easy to balance the impact tool 100 when the handle 70 is gripped. Note that "the rear end of the handle 70 is disposed at the rear end portion 62 of the housing 60" includes the case where at least one end of the handle configured separately from the housing 60 is connected to the rear end portion 62 of the housing 60, and the case where the housing 60 and the handle 70 are integrally configured such that the rear end portion 62 of the housing 60 and the rear end of the handle 70 are substantially the same.

[0054] The handle 70 is provided with a light emitting part 80 capable of irradiating light. The light emitting part 80 is, for example, an LED illumination powered by a battery BAT. The light emitting part 80 is configured to be able to irradiate light toward a work area including the tip tool TT, the object to be processed, or the surroundings thereof. By providing the light emitting part 80, the visibility of the work area by the striking tool 100 can be improved. In the present embodiment, the light emitting part 80 is provided on the front surface of the front connection part 72 of the handle 70. Therefore, according to the striking tool 100 of the present embodiment, the illuminance in the vicinity of the tip tool TT and the object to be processed can be made higher.

[0055] The grip part 76 is a substantially cylindrical long member and is the part gripped by the user. As shown in FIG. 7, the grip part 76 includes a grip opposing part 76F and a grip back part 76B on the side opposite to the grip opposing part 76F. The grip opposing part 76F is the part of the grip part 76 that faces the housing 60. In the example of FIG. 7, the grip opposing part 76F is the set of the tops of the outer surface of the grip part 76 that are closest to the housing 60. The grip back part 76B is the set of the tops of the outer surface of the grip part 76 on the side opposite to the grip opposing part 76F. When the grip part 76 has an opposing surface facing the housing 60, such as when the cross section of the grip part 76 is polygonal, the grip opposing part 76F may be defined using the opposing surface, and the grip back part 76B may be defined using the surface on the side opposite to the opposing surface.

[0056] A trigger 77 is provided on the grip opposing part 76F of the grip part 76. The trigger 77 is a so-called momentary type switch. The switch 78 (see FIG. 3) is turned on in response to the pressing operation of the trigger 77 by the user. When the switch 78 is turned on, power is supplied from the battery BAT to the motor 20, and the motor 20 is driven.

[0057] Using FIG. 7, the arrangement of the handle 70 in the front-rear direction will be described. The gripping portion 76 is arranged to be inclined with respect to the housing 60. Here, the end of the gripping portion 76 closer to the front end face 612 of the housing 60 is defined as the front end 76BF, and the shortest distance from the front end 76BF to the side face 64 of the housing 60 is defined as the front-side distance HT1. The "front end 76BF of the gripping portion 76" can be defined, for example, by using the position closest to the front end face 612 of the housing 60 among the gripping back portions 76B, or the vertex that is closest to the housing 60 and is in the vicinity of the front-side connecting portion 72 among the gripping back portions 76B.

[0058] The end of the gripping portion 76 closer to the rear face 622 of the housing 60 is defined as the rear end 76BB of the gripping portion 76, and the shortest distance from the rear end 76BB to the side face 64 of the housing 60 is defined as the rear-side distance HT2. The "rear end 76BB of the gripping portion 76" can be defined, for example, by using the position closest to the rear face 622 of the housing 60 among the gripping back portions 76B, or the vertex that is closest to the housing 60 and is in the vicinity of the rear-side connecting portion 74 among the gripping back portions 76B.

[0059] As shown in FIG. 7, the gripping portion 76 is configured such that the front-side distance HT1 is longer than the rear-side distance HT2. In other words, the gripping portion 76 is inclined with respect to the housing 60 such that the front side of the gripping portion 76 is farther from the housing 60 than the rear side of the gripping portion 76. By inclining the handle 70 in this way, it becomes easier for the user to lift the striking tool 100, and it also becomes easier to press the gripping portion 76 in the forward direction or the direction toward the tip tool TT. Therefore, it is possible to provide a highly workable striking tool 100 that is easy to push the tip tool TT forward while holding the handle 70. Note that the "extending direction of the gripping portion 76" can be defined, for example, by a straight line GD passing through the front end 76BF and the rear end 76BB.

[0060] As shown in FIG. 7, when the length of the housing 60 in the front-rear direction is defined as length L1, and the length of the gripping portion 76 in the front-rear direction along the striking axis TX is defined as length L2, in this embodiment, the length L2 of the gripping portion 76 is configured to be approximately 72% of the length L1 of the housing 60. By setting the length L2 of the gripping portion 76 to be equal to or greater than one-half of the length L1 of the housing 60, it is possible to provide a striking tool 100 that is easy for the user to balance and has good operability for the user. Note that the length L1 of the housing 60 is approximately 230 mm, which is set to be small compared to general striking tools.

[0061] The "length L1 of the housing 60" can be defined, for example, as the straight-line distance from the rear surface 622 to the front end surface 612. Instead of the rear surface 622, the length L1 of the housing 60 may be defined as the straight-line distance from the rear end 76BB or the top 36T of the battery mounting portion 30 to the front end surface 612. The "length L2 in the front-rear direction along the striking axis TX in the gripping portion 76" can be defined, for example, as the straight-line distance in the front-rear direction along the striking axis TX in the gripping portion 76 starting from the rear end 76BB. Instead of the rear end 76BB, the length L2 may start from the rear surface 622. Note that from the perspective of improving the operability of the striking tool 100, it is preferable that the length L2 is equal to or greater than one-half of the length L1. In this case, the length L2 may be, for example, 60% or more, 70% or more, 75% or more, 80% or more, or 90% or more of the length L1, or may be two-thirds or more.

[0062] The layout configuration of the handle 70 in plan view will be described with reference to FIG. 8. FIG. 8 shows a plan view of the striking tool 100 as viewed from above. Specifically, it shows the striking tool 100 in a state as viewed from above along the direction DM (see FIG. 3), which is the direction orthogonal to the motor rotation axis MX and the striking axis TX and passes through the handle 70 and the striking mechanism 50. In the example of FIG. 3, the direction DM coincides with the vertical direction.

[0063] In FIG. 8, an overlapping region AR between the handle 70 and the striking mechanism 50 is shown using cross-hatching. As shown in FIG. 8, in the striking tool 100 of the present embodiment, a part of the handle 70, specifically a part of the gripping portion 76, is configured to overlap at least a part of the striking mechanism 50. That is, the striking tool 100 of the present embodiment is configured such that the gripping portion 76 is disposed directly above the striking mechanism 50. By disposing the handle 70 above the striking mechanism 50, which is likely to have a large weight among the components within the housing 60, it is possible to provide a striking tool 100 that is easy for the user to balance and has good operability for the user.

[0064] Further, in the striking tool 100 of the present embodiment, the handle 70 is disposed on the side opposite to the motion conversion portion 54 with respect to the striking axis TX (see FIG. 3). The handle 70 is disposed above the housing 60, the motion conversion portion 54 is disposed below in the housing 60, and the striking axis TX is disposed between the motion conversion portion 54 and the handle 70. By disposing the handle 70 in the vicinity of the striking axis TX, it is possible to improve the operability of the striking tool 100 during the hammering operation by the user. Further, the handle 70, the striking axis TX, and the motion conversion portion 54 are arranged along the vertical direction, and by disposing the motion conversion portion 54, which is likely to have a large weight among the striking mechanisms 50, below in the housing 60, it is possible to provide a striking tool 100 that is easy for the user to balance and has good operability for the user.

[0065] As described above, according to the impact tool 100 of the present embodiment, it includes an impact mechanism 50 that utilizes an air spring and a handle 70 for the user to grip. The rear end of the handle 70 is disposed at the rear end portion 62 of the housing 60. By the impact mechanism 50 that utilizes an air spring, compared with an impact mechanism that mechanically transmits kinetic energy, the vibration of the impact tool 100 can be suppressed, and a large amount of kinetic energy can be transmitted to the tip tool TT. Further, since the handle 70 is disposed at the rear end of the housing 60, it is easy for the user to grip the handle 70 and apply a force to push the tip tool TT into the workpiece along the impact axis TX, and an impact tool 100 having a high impact force by the tip tool TT can be provided.

[0066] According to the impact tool 100 of the present embodiment, the motor housing portion 624 is provided at the rear end portion 62 of the housing 60. By disposing the motor 20 at the rear end portion 62 of the housing 60, the radial size of the housing 60 that intersects the impact axis TX can be reduced.

[0067] According to the impact tool 100 of the present embodiment, further, a battery mounting portion 30 for detachably mounting the battery BAT is provided on the rear surface 622 of the housing 60. Compared with the case where the battery mounting portion 30 is provided on the side surface 64 of the housing 60, the radial size of the housing 60 can be reduced. Therefore, it is easy to bring the housing 60 close to a workpiece such as the ground, and an impact tool 100 suitable for excavation work or the like can be provided.

[0068] According to the impact tool 100 of the present embodiment, the motor 20 is disposed such that the impact axis TX passes through the motor 20. Therefore, the radial size of the housing 60 can be reduced.

[0069] According to the impact tool 100 of the present embodiment, the handle 70 is connected to the side surface 64 of the housing 60 and is disposed on the side opposite to the motion conversion unit 54 across the impact axis TX. By disposing the handle 70 in the vicinity of the impact axis TX, it becomes easier for the user to press the tip tool TT against the workpiece in operations such as peeling and excavation. Further, the handle 70, the impact axis TX, and the motion conversion unit 54 are arranged along the vertical direction, and the motion conversion unit 54, which is likely to be heavy in the impact mechanism 50, is disposed on the lower side within the housing 60, whereby an impact tool 100 that is easy for the user to balance and has good operability can be provided.

[0070] According to the impact tool 100 of the present embodiment, the handle 70 includes a rear connection portion 74 connected to the rear end portion 62 of the housing 60, a front connection portion 72 connected to the side surface 64 of the housing 60, and a grip portion 76 that connects the rear connection portion 74 and the front connection portion 72. By configuring the handle 70 and the housing 60 in an annular shape, an impact tool 100 with good operability for the user can be provided.

[0071] According to the impact tool 100 of the present embodiment, in a plan view of viewing the impact tool 100 along the direction DM that is orthogonal to the motor rotation axis MX and passes through the handle 70 and the impact mechanism 50, at least a part of the grip portion 76 overlaps at least a part of the impact mechanism 50. By disposing the handle 70 directly above the impact mechanism 50, which is likely to be heavy, an impact tool 100 that is easy for the user to balance and has good operability can be provided.

[0072] According to the impact tool 100 of the present embodiment, the grip portion 76 is inclined with respect to the impact axis TX so as to move away from the impact axis TX as it goes from the rear end portion 62 toward the tip surface 612. Therefore, an impact tool 100 that is easy to lift and is easy to push the tip tool TT forward by operating the handle 70 can be provided.

[0073] According to the impact tool 100 of the present embodiment, the length in the front-rear direction along the impact axis TX in the gripping portion 76 is equal to or more than half of the length from the back surface 622 to the tip surface 612 in the housing 60. By making the length L2 of the gripping portion 76 approximately the same as the length L1 of the housing 60, it is possible to provide an impact tool 100 that is easy for the user to balance and has good operability for the user.

[0074] The impact tool 100 of the present embodiment further includes a battery mounting portion 30 on the back surface 622 where the battery BAT can be detachably mounted. The detachment direction DB of the battery BAT in the battery mounting portion 30 is orthogonal to the impact axis TX and intersects the extending direction GD of the gripping portion 76. Even when the user holds the handle 70 with one hand, the user can easily attach and detach the battery BAT with the other hand.

[0075] The impact tool 100 of the present embodiment further includes a light emitting portion 80 that can irradiate light. The light emitting portion 80 can illuminate the tip tool TT, the processing target, or the surroundings thereof, and can improve the visibility of the working area by the impact tool 100.

[0076] B. Second Embodiment: With reference to FIGS. 9 and 10, the configuration of the impact tool 100b according to the second embodiment will be described. As shown in FIG. 9, the impact tool 100b according to the present embodiment is different from the impact tool 100 according to the first embodiment in that it includes a housing 60b instead of the housing 60, a handle 70b instead of the handle 70, a motor 20b instead of the motor 20, and further includes a controller 40, and the other configurations are the same.

[0077] The impact tool 100b of the present embodiment is used, for example, for the peeling operation of the object to be processed. Instead of a shovel, a scraper (not shown), for example, is adopted for the tip tool TT. The scraper is a tool for performing a peeling operation on the object to be processed. The tip tool TT may be a so-called spatula. Further, a needle scaler may be used for the tip tool TT. The needle scaler is a tool capable of peeling rust and paint on the surface of the object to be processed by reciprocating a plurality of needle-shaped members back and forth and pressing them against the object to be processed. The needle scaler may also be called a needle gun scaler or a needle gun, etc.

[0078] The motor 20b is a brushless DC motor whose rotation speed is controlled by the controller 40. The controller 40 is composed of a computer including a CPU as a processor and a memory such as a RAM and a ROM. The controller 40 is configured to control various operations in the impact tool 100, such as the drive control of the motor 20b. The controller 40 is disposed on the rear side of the motor housing portion 624 in the rear end portion 62. Specifically, the controller 40 is disposed between the back surface 622 and the motor housing portion 624. In other words, the controller 40 is disposed between the battery mounting portion 30 and the motor 20b. By configuring in this way, the radial size of the housing 60b is reduced.

[0079] The handle 70b has a different shape from the handle 70 shown in the first embodiment. In the above first embodiment, an example in which the shapes of the handle 70 and the housing 60 are annular is shown. In contrast, in the present embodiment, the handle 70b extends substantially linearly in a direction away from the housing 60b. The shape of the handle 70b may be called a "cantilever handle".

[0080] The handle 70b includes a connection portion 74b and a grip portion 76b connected to the connection portion 74b. The connection portion 74b is a portion connected to the rear end portion 62 of the housing 60b. That is, one end of the handle 70b is connected to the rear end portion 62 of the housing 60b in the same manner as the handle 70 shown in the first embodiment. In the handle 70b, one end of the grip portion 76b is connected to the rear end portion 62 of the housing 60b via the connection portion 74b. The front end of the grip portion 76b is a so-called free end disposed at a position separated from the housing 60b and is not connected to the housing 60b. The front end of the grip portion 76b is also referred to as the "tip 76T".

[0081] The rear end 70B of the connection portion 74b is on the rear side of the motor housing portion 624 and is disposed on the rear side of the controller 40. In the example of FIG. 9, the rear end 70B is substantially flush with the rear surface 622 of the housing 60b, and the rear end of the handle 70b substantially coincides with the rear end of the housing 60b. Also, the handle 70b is disposed on the opposite side of the motion conversion portion 54 across the striking axis TX in the same manner as the handle 70 shown in the first embodiment. That is, the handle 70b is connected to the side surface 64 above the motor housing portion 624 and the striking housing portion 63 at the rear end portion 62 of the housing 60b. By disposing the handle 70b above the striking axis TX, it becomes easier to press the rear side of the handle 70b forward while gripping the handle 70b. Therefore, it becomes easier for the user to perform an operation of pressing the tip tool TT in peeling work, excavation work, etc. toward the work object.

[0082] The grip portion 76b is a substantially cylindrical elongated member and is a portion gripped by the user. A trigger 77 having the same configuration as the trigger 77 shown in the first embodiment is provided on the front side of the grip portion 76b.

[0083] As shown in FIG. 9, the extending direction HD in which the gripping portion 76b extends is a direction that intersects the striking axis TX and is substantially linear. The extending direction HD is an example of the "extending direction of the gripping portion 76". Since the handle 70b is linearly configured in the direction away from the housing 60b, it is easy for the user to press the rear side of the handle 70b forward while gripping the handle 70b, and the operation of pressing the tip tool TT against the workpiece becomes easy. Therefore, the impact tool 100b suitable for the peeling operation can be provided.

[0084] The "extending direction HD" can be defined, for example, by a straight line connecting the midpoint 74CP between the front end 74F of the connecting portion 74b and the rear end 70B which is the rear end 70B of the connecting portion 74b, and the apex 76UP of the gripping portion 76b. The apex 76UP is the portion of the tip 76T where the shortest distance from the tip 76T to the side surface 64 of the housing 60b is the longest.

[0085] The extending direction HD is configured such that the vertical direction component orthogonal to the striking axis TX is larger than the front-rear direction component along the striking axis TX. That is, the extending direction HD is configured such that the angle θ1 between it and the striking axis TX is 45 degrees or more. In the present embodiment, the angle θ1 is configured to be about 75 degrees, and the extending direction HD is a direction slightly inclined forward with respect to the vertical direction. However, the angle θ1 is not limited to 75 degrees and may be set to any angle of 45 degrees or more and less than 90 degrees, such as 45 degrees, 60 degrees, 75 degrees, etc. Even in such a configuration, it is easy for the user to press the rear side of the handle 70b forward while gripping the handle 70b, and the impact tool 100b suitable for the peeling operation can be provided. Note that the extending direction HD may not be inclined forward with respect to the vertical direction, and the angle θ1 may be set to 90 degrees and configured to be perpendicular to the housing 60b.

[0086] The extending direction HD is not limited to the example using the front end 74F and the midpoint 74CP, and may be defined using a straight line connecting the front end 74F and the apex 76UP, or may be defined using a straight line connecting the rear end 70B and the apex 76UP. The extending direction HD may be defined using a straight line connecting the midpoint of the tip 76T and any one of the front end 74F, the midpoint 74CP, and the rear end 70B. The midpoint 74CP may be defined using the center or centroid of the connection surface between the connection portion 74b and the handle 70b.

[0087] In the striking tool 100b of the present embodiment, a protruding portion 79 is provided at the tip 76T of the gripping portion 76b. The protruding portion 79 is a substantially plate-shaped structure protruding forward from the gripping portion 76b. The protruding direction FD in which the protruding portion 79 protrudes intersects the extending direction HD and is a direction from the extending direction HD toward the front side. In the present embodiment, the protruding direction FD is substantially orthogonal to the extending direction HD. In the example of FIG. 9, the front end 76TF of the tip 76T, which is the other end of the gripping portion 76b, is on the front side of the front end 74F of the connection portion 74b. A light emitting portion 80 is provided at the front end 76TF of the protruding portion 79. By providing the light emitting portion 80 at the front end 76TF, the illuminance in the vicinity of the tip tool TT and the workpiece can be increased. Note that the protruding direction FD is not limited to the case where it is orthogonal to the extending direction HD, and may intersect the extending direction HD at an arbitrary angle. Note that the light emitting portion 80 may be omitted.

[0088] The protruding portion 79 protrudes forward by a predetermined distance further than the surface of the trigger 77 in the protruding direction FD. That is, the front end 76TF is disposed on the front side of the surface of the trigger 77. When operating the striking tool 100b while gripping the gripping portion 76b, for example, for turning on and off the trigger 77, it is assumed that the trigger 77 is operated with a finger FG of one hand, such as an index finger, in contact therewith. Since the protruding portion 79 is located above the user's finger FG in the vertical direction, the user can support the bottom 79B of the protruding portion 79 with the finger FG. Therefore, it is possible to provide the striking tool 100b with good operability for the user while including the linear handle 70b. Further, it becomes easy to lift the striking tool 100b, and when the tip tool TT is a shovel, the operability of the striking tool 100 in the work of digging up the ground can be improved.

[0089] In addition, when the striking tool 100b includes an electronic switch instead of the trigger 77, the electronic switch is preferably disposed on the tip 76T of the gripping portion 76b. By configuring in this way, when the user operates the striking tool 100b while gripping the handle 70b, for example, the electronic switch on the tip 76T can be suitably operated by using a thumb.

[0090] As shown in Fig. 9, the housing 60b is different from the housing 60 shown in the first embodiment in that it is provided with an anti-slip portion 68. Inside the housing 60b, a motor 20b, a striking mechanism 50, a tool holder 90, etc. are accommodated in the same configuration as the housing 60. Further, on the back surface 622 of the housing 60b, a battery mounting portion 30 for mounting the battery BAT is provided in the same manner as the housing 60. The detachment / attachment direction DB2 of the battery BAT in the battery mounting portion 30 intersects the striking axis TX and is a direction slightly inclined rearward with respect to the vertical direction. Also, the detachment / attachment direction DB2 intersects the extending direction HD of the gripping portion 76b. That is, the detachment / attachment direction DB2 is a direction included in the plane defined by the striking axis TX and the extending direction HD. Therefore, even when the user holds the handle 70b with one hand, the user can easily detach / attach the battery BAT with the other hand. Note that the detachment / attachment direction DB2 is included in the "direction that intersects the striking axis TX and passes through the handle 70".

[0091] The anti-slip portion 68 is provided on the side surface 64 of the housing 60b. More specifically, the anti-slip portion 68 is provided at a position on the side surface 64 of the housing 60b that is on the front side of the central position in the front-rear direction of the housing 60b and on the front side of the central position in the front-rear direction of the striking accommodation portion 63. The anti-slip portion 68 is a protrusion that protrudes outward from the side surface 64.

[0092] As shown in Fig. 10, the anti-slip portion 68 is generally formed in an annular shape and is continuously provided around the side surface 64 with the striking axis TX as the center. In Fig. 10, for convenience of understanding, the anti-slip portion 68 is hatched. The anti-slip portion 68 is integrally formed with the housing 60b, for example, by die molding using a synthetic resin. However, not limited thereto, the anti-slip portion 68 may be formed by attaching a member separate from the housing 60b, such as an elastic member, to the side surface 64.

[0093] Here, in the impact tool 100b of the present embodiment, the handle 70b is linear, and the other end of the handle 70b is not connected to the front side of the housing 60b. Therefore, it is assumed that the user can easily grip the front side of the side surface 64 of the housing 60b with the other hand and operate the impact tool 100b while gripping it with both hands. When the user operates the impact tool 100b with both hands, for example, one hand grips the gripping portion 76b, and the other hand grips, for example, the side surface 64 or the like of the impact receiving portion 63. When the user operates the impact tool 100b to press the tip tool TT against a processing target such as the ground, the user applies a force to the handle 70b with one hand and performs a pressing operation of applying a force toward the front side to the housing 60b by using the frictional force with the side surface 64 with the other hand.

[0094] In the impact tool 100b of the present embodiment, by providing the anti-slip portion 68 on the front side of the side surface 64, the user can hook the finger of the other hand on the anti-slip portion 68 during the pressing operation. Therefore, the user can easily apply a force for pressing the impact tool 100b toward the front side to the rear side of the anti-slip portion 68 by using the finger of the other hand and can easily perform the pressing operation. In addition, it is possible to suppress or prevent the user's hand from slipping to the front side of the housing 60b during the operation of the impact tool 100b. The arrangement position of the anti-slip portion 68 is preferably arranged at a position on the side surface 64 where the user can easily grip it.

[0095] As described above, according to the impact tool 100b of the present embodiment, the handle 70b is connected to the side surface 64 of the housing 60b and is arranged on the side opposite to the motion conversion portion 54 with the impact axis TX interposed therebetween. By arranging the handle 70b in the vicinity of the impact axis TX, the user can easily perform an operation of pressing the tip tool TT toward the processing target in a peeling operation, a digging operation, or the like. In addition, the handle 70b, the impact axis TX, and the motion conversion portion 54 are arranged along the vertical direction, and the motion conversion portion 54, which is likely to have a large weight in the impact mechanism 50, is arranged on the lower side in the housing 60b, so that it is possible to provide an impact tool 100b that is easy for the user to balance and has good operability for the user.

[0096] According to the striking tool 100b of the present embodiment, the handle 70b has a connecting portion 74b that connects one end of the handle 70b to the rear end portion 62, and a gripping portion 76b that linearly extends from the connecting portion 74b along an extending direction HD that intersects the striking axis TX. Since the handle 70b is linearly configured in a direction away from the housing 60b, it is easy for the user to press the handle 70b from the rear side while gripping the handle 70b, and the operation of pressing the tip tool TT forward toward the workpiece to be processed becomes easy. Therefore, the user can provide a striking tool 100b that is easy to press against the workpiece to be processed and has high workability.

[0097] According to the striking tool 100b of the present embodiment, the gripping portion 76b has a protruding portion 79 that protrudes from the gripping portion 76b along a protruding direction FD that intersects the extending direction HD. The user can support the protruding portion 79 with a finger FG or the like while gripping the gripping portion 76b. Therefore, it is possible to provide a striking tool 100b with good operability for the user while including the linear handle 70b.

[0098] C. Third Embodiment: The configuration of the striking tool 100c according to the third embodiment will be described with reference to FIG. 11. As shown in FIG. 11, the striking tool 100c according to the present embodiment is different from the striking tool 100 according to the first embodiment in that it includes a housing 60c instead of the housing 60, a handle 70c instead of the handle 70, and a switch 77c instead of the trigger 77, and the other configurations are the same. The tip tool TT is a shovel configured in the same manner as in the first embodiment.

[0099] Switch 77c is a push button for switching the energization to motor 20 on and off. Switch 77c is provided on side surface 64 of housing 60c. In the present embodiment, switch 77c is the rear end portion 62 of side surface 64 and is provided near handle 70c. By disposing switch 77c near handle 70c, the user can easily operate switch 77c while gripping handle 70c. Note that any type of switch can be adopted for switch 77c. Switch 77c may be, for example, a momentary type or alternate type push button, or may be an electrostatic type or membrane type switch or the like.

[0100] Housing 60c is different from housing 60 in that it includes recess 64R. Recess 64R is a portion of housing 60c where the cross-sectional area is smaller than other portions. In the present embodiment, the entire recess 64R provided on side surface 64 of housing 60c functions as handle 70c. That is, in impact tool 100c of the present embodiment, handle 70c does not extend from housing 60 and is provided integrally with housing 60. The front surface 64RS of the front end of recess 64R is inclined and is configured to make it easy for a finger to catch when the user grips handle 70c. Therefore, it is possible to suppress or prevent the user's hand from slipping to the front side of housing 60c during the operation of impact tool 100c. The width of the cross section of recess 64R is preferably a length that is easy for the user to grip.

[0101] Recess 64R is formed at the rear end portion 62 of housing 60c. That is, also in impact tool 100c of the present embodiment, the rear end of handle 70c is disposed at the rear end portion 62 of housing 60c. Therefore, it is possible to provide impact tool 100c that has high workability, as the user can easily perform the operation of gripping handle 70c and pushing tip tool TT into the workpiece.

[0102] In addition, when the housing 60c does not include the concave portion 64R, any position of the housing 60c except the front end portion 61 may function as the handle 70c on the premise that the user can grip the housing 60c. In this case, the rear end of the handle 70c is disposed at the rear end portion 62 of the housing 60c and coincides with the rear end of the housing 60c. Further, the front end of the handle 70c is disposed at the front end portion 61 of the housing 60c and coincides with the front end of the housing 60c. The user operates the impact tool 100c while gripping an arbitrary position of the housing 60c with both hands or one hand, for example.

[0103] D. Other Embodiments: (D1) In each of the above embodiments, the impact tools 100 and 100b including a shovel or a needle scaler have been described as examples of the tip tool TT. In contrast, tools other than a shovel or a needle scaler may be used as the tip tool TT. Note that the shovel may be standardized according to Japanese Industrial Standards (JIS), or may be other than that. The shovel may or may not have a footrest portion.

[0104] (D2) In each of the above embodiments, the configuration in which the motion conversion member 546 includes the rotating body 546R and the swinging member 546S has been described as an example. In contrast, the motion conversion member 546 may be configured using a so-called crank mechanism. The motion conversion member 546 having a crank mechanism includes, for example, a crankshaft and a connecting rod. The crankshaft receives the rotation of the pinion gear 541 of the motor shaft 24 and rotates around a rotation axis in a direction perpendicular to the motor rotation axis MX, for example. The connecting rod connects the piston 522 and a crank pin provided on the crankshaft. When the motor shaft 24 rotates due to the drive of the motor 20, the crankshaft rotates, and the crank pin rotates around the rotation axis of the crankshaft. The piston 522 reciprocates in the front-rear direction via the connecting rod that swings due to the rotation of the crank pin. The impact tool 100 configured as described above exhibits the same effects as those of the above embodiments.

[0105] (D3) Further, in view of the gist of the present disclosure and the above-described embodiments, the following aspects are constructed. The following aspects can be adopted in combination with the striking tools 100, 100b, 100c shown in the embodiments and the above-described modifications, or the disclosure described in each claim. [Aspect 1] The rear end of the handle is flush with the back surface. [Aspect 2] The rear end of the handle coincides with the end of the housing. [Aspect 3] The rear end of the handle is formed continuously with the back surface. [Aspect 4] The rear end of the handle is connected to at least a part of the battery mounting portion. [Aspect 5] The front end of the handle is disposed in the vicinity of the front end portion. [Aspect 6] The striking tool includes a convex anti-slip portion protruding outward from the side surface on the side surface of the housing. [Aspect 7] The anti-slip portion is disposed in the vicinity of the front end portion. [Aspect 8] The light emitting portion is provided at the front connection portion. [Aspect 9] The angle between the extending direction and the striking axis is 45 degrees or more and less than 90 degrees. [Aspect 10] The handle and the housing are integral.

Explanation of Reference Numerals

[0106] 20, 20b... motor, 22... motor body, 24... motor shaft, 30... battery mounting part, 32... guide rail, 34... terminal, 36... side wall part, 36T... top part, 40... controller, 50... striking mechanism, 52... striking part, 54... motion conversion part, 56... anti - dry - fire mechanism, 58... rotation restricting mechanism, 60, 60b, 60c... housing, 61... front end part, 62... rear end part, 63... striking accommodation part, 64... side surface, 64R... recess, 68... anti - slip part, 70, 70b, 70c... handle, 70B... rear end, 70F... front end, 72... front - side connection part, 74... rear - side connection part, 74CP... mid - point, 74F... front end, 74b... connection part, 76... gripping part, 76B... gripping back, 76BB... rear end, 76BF... front end, 76F... gripping opposite part, 76T... tip, 76TF... front end, 76UP... apex, 76b... gripping part, 77... trigger, 77c... switch, 78... switch, 79... protruding part, 79B... bottom, 80... light - emitting part, 90... tool holder, 92... insertion hole, 100, 100b, 100c... striking tool, 520... cylinder, 522... piston, 524... striker, 526... impact bolt, 541... pinion gear, 542... intermediate gear, 543... intermediate shaft, 544... transmission member, 546... motion conversion member, 546A... arm part, 546R... rotating body, 546S... oscillating member, 562... transmission fitting part, 564... conversion fitting part, 566... biasing member, 568... connecting part, 582... rail part, 584... groove part, 612... front end face, 612B... front end position, 612F... front end position, 622... back face, 624... motor accommodation part, BAT... battery, DB, DB2... attachment - detachment direction, FD... protruding direction, FG... finger, GD... straight line, HD... extending direction, MX... motor rotation axis, SP... air chamber, SX... shaft rotation axis, TT... tip tool, TX... striking axis, UT... striking unit

Claims

1. A striking tool, comprising a motor having a motor shaft that rotates about a motor rotation axis, a cylinder and a striker adjacent to an air chamber defined inside the cylinder, and a striking mechanism that converts the rotational movement of the motor shaft into a linear movement of the striker along a predetermined striking axis by utilizing an air spring of the air chamber, a front end portion including a front end surface to which a tip tool is attached, a rear end portion including a rear surface opposite to the front end surface, a housing that houses the motor and the striking mechanism, and a handle configured to be gripped by a user, wherein the motor rotation axis and the striking axis are parallel to each other, and a rear end of the handle is disposed at the rear end portion. Striking tool.

2. The striking tool according to claim 1, wherein a motor housing portion that houses the motor is provided at the rear end portion.

3. The striking tool according to claim 1 or claim 2, further comprising a battery mounting portion to which a battery for supplying electric power for driving the motor is detachably attached, wherein the striking axis passes through the battery mounting portion. Striking tool.

4. The striking tool according to any one of claims 1 to 3, wherein the striking axis passes through the motor.

5. The striking tool according to any one of claims 1 to 4, wherein the striking mechanism includes a motion conversion portion that converts the rotational movement of the motor shaft into a linear movement of the striker, and the handle is connected to a side surface of the housing, and is disposed on a side opposite to the motion conversion portion with the striking axis interposed therebetween. Striking tool.

6. The striking tool according to any one of claims 1 to 5, wherein in a plan view of viewing the striking tool along a direction that is orthogonal to the motor rotation axis and passes through the handle and the striking mechanism, at least a part of the handle overlaps at least a part of the striking mechanism. Striking tool.

7. The striking tool according to any one of claims 1 to 6, wherein the handle includes a rear connection portion that connects a rear end of the handle to the rear end portion, a front connection portion that connects a front end of the handle to a side surface of the housing, and a gripping portion that connects the rear connection portion and the front connection portion. Striking tool.

8. The striking tool according to claim 7, ​ The gripping portion is inclined with respect to the striking axis so as to move away from the striking axis as it goes from the rear end portion toward the tip end surface. Striking tool.

9. The striking tool according to any one of Claims 7 to 8, wherein the length of the gripping portion along the striking axis is equal to or more than half of the length from the rear surface to the tip end surface in the housing. Striking tool.

10. The striking tool according to any one of Claims 1 to 5, wherein the handle has a connecting portion connecting the rear end of the handle to the rear end portion, and a gripping portion extending from the connecting portion along an extending direction intersecting the striking axis, and the extending direction is configured such that the direction component in the direction orthogonal to the striking axis is larger than the direction component in the direction along the striking axis. Striking tool.

11. The striking tool according to Claim 10, wherein the front end of the handle is spaced apart from the housing, and the gripping portion has a protruding portion protruding from the gripping portion along a protruding direction intersecting the extending direction. Striking tool.

12. The striking tool according to Claim 5, further comprising a battery mounting portion provided at the rear end portion for detachably mounting a battery that supplies power for driving the motor to the motor, wherein the detaching / attaching direction of the battery in the battery mounting portion intersects the striking axis and is a direction passing through the handle. Striking tool.

13. The striking tool according to any one of Claims 1 to 12, further comprising a light emitting portion capable of irradiating light toward a work area.

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