Impact tools

Abstract

The present invention provides a striking tool that allows for easy assembly of internal components and easy construction of a vibration-damping housing. [Solution] The striking tool comprises a drive body having a motor and a tool mounting section to which a tip tool is attached; a drive body housing section composed of a pair of divided outer wall members that can be divided in the dividing direction, having a rear end housing, a gripping section provided at the rear end, and connected to the drive body section in a manner that allows movement in the front-rear direction; a guide member connected to the drive body housing section in a manner that allows movement of the drive body housing section in the front-rear direction; an elastic mechanism that applies elastic force to the drive body section at one end in the front-rear direction and to the drive body housing section at the other end; and an engaging section provided on the inner wall surface of the divided outer wall member and capable of engaging with the other end of the elastic mechanism.

Description

Technical Field

[0001] The technology of the present disclosure relates to a impact tool.

Background Art

[0002] Impact tools are used, for example, for chipping work, and strike a workpiece that is a processing target by driving a tip tool attached to the tip thereof with a motor. For example, the following Patent Document 1 discloses an electric hammer that is an example of an impact tool.

[0003] In an impact tool, a housing that accommodates a drive mechanism for driving a tip tool and to which a grip portion gripped by a user is connected may be configured as a so-called vibration-proof housing. The vibration-proof housing uses the elastic force of an elastic body disposed inside to reduce the vibration of the drive mechanism transmitted to the grip portion when the impact tool is driven.

[0004] For example, the following Patent Document 1 discloses an electric hammer that is an example of an impact tool including a vibration-proof housing. In the electric hammer of Patent Document 1, a compression coil spring that is an elastic body for vibration isolation is held between a handgrip that is a grip portion and a main body housing that accommodates a drive mechanism, whereby the vibration-proof housing is configured.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In impact tools, it is preferable that the outer wall members constituting the housing are configured to facilitate the assembly of components such as electrical components installed inside. Furthermore, it is preferable that the impact tool allows for the easy construction of a vibration-damping housing using an elastic body as described above. In impact tools, there was still room for improvement regarding the ease of assembly of internal components installed inside the housing and the method of constructing the vibration-damping housing.

[0007] The present invention aims to provide a striking tool that allows for easy assembly of internal components such as electrical components and for easy construction of a vibration-damping housing. [Means for solving the problem]

[0008] One aspect of the present disclosure is provided as a striking tool. The striking tool of this aspect comprises a drive body having a tool mounting portion at its tip to which a tip tool that is driven in the front-rear direction to strike a workpiece is attached, and a drive mechanism for driving the tip tool, including a motor, located at the rear end of the tool mounting portion; a drive body housing portion having a pair of divided outer wall members that can be divided in a dividing direction perpendicular to the front-rear direction, having a rear end housing that accommodates at least the rear end of the drive body portion, having a gripping portion at the rear end for gripping by a user, and being connected to the drive body portion in a manner that allows it to move in the front-rear direction; and a drive body housing portion fixed to the drive body portion along the front-rear direction inside the drive body housing portion, and the front of the drive body housing portion The device comprises: a guide member connected to the drive body housing in a manner that allows movement in the rearward direction, and which guides the movement of the drive body housing relative to the drive body in the front-rear direction; an elastic mechanism disposed inside the rear end housing, which has an elastic body that elastically deforms to generate an elastic force in the front-rear direction when the drive body moves in the front-rear direction relative to the drive body housing, and which applies the elastic force to the drive body at one end in the front-rear direction and to the drive body housing at the other end; and an engaging portion provided on the inner wall surface of the divided outer wall member, which can engage with the other end of the elastic mechanism.

[0009] With this embodiment of the striking tool, when the divided outer wall members constituting the rear end housing are separated, internal components such as electrical components can be easily assembled inside the drive body housing. Furthermore, when the pair of divided outer wall members are joined in the dividing direction to form the rear end housing, the end of the elastic mechanism can be easily fixed to the rear end housing by engaging the rear end of the elastic mechanism with the engaging portion on the inner wall surface of the divided outer wall member. Therefore, it is easy to configure the rear end housing as a vibration-damping housing. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic perspective view of a striking tool. [Figure 2] This is a schematic exploded perspective view of a striking tool. [Figure 3] This is a schematic side view of the drive unit, shown through the rear end housing. [Figure 4] Figure 2 is a schematic cross-sectional view of the drive unit during the 4-4 cutting process shown. [Figure 5] This is a schematic perspective view of the elastic mechanism located at the rear end of the drive unit. [Figure 6] This is a schematic exploded perspective view of the elastic mechanism. [Figure 7] This is a schematic diagram showing the elastic deformation of an elastic mechanism. [Figure 8A] This is a schematic perspective view of the engaging portion provided on the inner wall surface of the divided outer wall member. [Figure 8B] This is a schematic perspective view showing the elastic mechanism engaged with the engagement portion. [Figure 9] This is a schematic rear view of the drive unit as seen from the rear. [Figure 10] This is a schematic diagram showing the flow of cooling air inside the drive unit housing. [Figure 11] This is a schematic perspective view of the flow path components that make up the cooling airflow path. [Figure 12] This is a schematic diagram showing the deflection deformation of the flow channel member within the impact tool. [Figure 13]This is a schematic perspective view of the grooved wiring section that constitutes the wiring route for the lighting unit. [Figure 14] This is a schematic perspective view of the protruding part that fits into the groove-shaped wiring section. [Modes for carrying out the invention]

[0011] In one or more embodiments of the present disclosure, the guide member is composed of an axial member, and the elastic body may be composed of a coil spring provided on the outer circumference of the guide member and which expands and contracts in the front-rear direction to generate the elastic force. With this configuration of the striking tool, the guide member and the coil spring are integrated, making it possible to miniaturize and simplify the internal structure of the striking tool. Furthermore, since the coil spring can expand and contract along the guide member while being supported by the guide member, the expansion and contraction movement of the coil spring can be made smoother. Therefore, the vibration reduction effect of the elastic mechanism can be further enhanced.

[0012] In one or more embodiments of the present disclosure, the elastic mechanism includes a cylindrical member having a cylindrical hole through which the guide member is inserted, and which moves along the guide member while in contact with the rear end of the elastic body, the cylindrical member constituting the other end of the elastic mechanism, and the engaging portion may engage with the elastic mechanism at the cylindrical member. With this configuration, the cylindrical member guided by the guide member can appropriately apply a longitudinal elastic force to the rear end housing for vibration reduction. Furthermore, the engagement of the engaging portion with the cylindrical member facilitates fixing the elastic mechanism to the rear end housing, thereby improving the ease of assembling the elastic mechanism to the impact tool. Thus, the vibration-damping housing can be constructed more simply in the impact tool.

[0013] In one or more embodiments of the technology of the present disclosure, the length in the front-rear direction of the engaged portion of the tubular member that is engaged with the engaging portion may be substantially the same as the length of the engaging portion in the front-rear direction. According to the impact tool of this configuration, the fixation of the tubular member to the engaging portion can be enhanced. Accordingly, it is possible to suppress the installation state of the elastic mechanism in the rear end side housing from becoming unstable, and the vibration reduction effect by the elastic mechanism can be further enhanced.

[0014] In one or more embodiments of the technology of the present disclosure, the engaging portion may have a substantially semicircular cross-sectional shape that opens in the dividing direction, have a groove portion extending in the front-rear direction, and be engaged with the tubular member by receiving the tubular member in the dividing direction inside the groove portion. According to the impact tool of this configuration, the tubular member can be fitted to the engaging portion even more easily. Accordingly, in the impact tool, the vibration-proof housing can be configured more simply.

[0015] In one or more embodiments of the present disclosure, the tubular member may be installed in the elastic mechanism in a state where it receives an elastic force from the elastic body. According to the impact tool of this configuration, the elastic force of the elastic body suppresses the movement of the tubular member in the initial state before the start of driving of the impact tool, so that the occurrence of rattling of the tubular member in the initial state can be suppressed. In addition, the elastic force of the elastic body can be immediately increased when vibration of the impact tool occurs. Accordingly, the vibration reduction effect by the elastic mechanism can be further enhanced.

[0016] In one or more embodiments of the present disclosure, the grip portion has a columnar configuration extending in the up-down direction orthogonal to both the front-rear direction and the left-right direction at the center in the left-right direction orthogonal to the front-rear direction, and a plurality of the elastic mechanisms are provided, which may be arranged on both sides in the left-right direction with the grip portion as the center. According to the impact tool of this configuration, the elastic force of the elastic mechanism can be generated in a well-balanced manner on both sides in the left-right direction across the grip portion. Accordingly, the vibration reduction effect by the elastic mechanism can be further enhanced. In addition, the impact tool can be driven in a more stable posture.

[0017] In one or more embodiments of the present disclosure, at least four elastic mechanisms are provided, and when viewed in the front-to-back direction, at least two of the elastic mechanisms may be arranged in the vertical direction on both sides of the gripping portion in the left-to-right direction. With this configuration, the elastic mechanisms can be arranged in a balanced manner in the left-to-right and vertical directions. Therefore, the vibration reduction effect of the elastic mechanisms can be further enhanced. In addition, the striking tool can be driven in a more stable position.

[0018] In one or more embodiments of the present disclosure, the gripping portion has a columnar structure extending along the front-rear direction and the up-down direction perpendicular to the left-right direction perpendicular to the front-rear direction, and the tip tool, the motor, and the gripping portion may be arranged to overlap each other when viewed in the front-rear direction. With this configuration of the striking tool, it is possible to suppress an increase in the dimensions of the striking tool in the left-right and up-down directions. Furthermore, with this configuration of the striking tool, since the tip tool, motor, and gripping portion are arranged in a line in the front-rear direction, the elastic force in the front-rear direction generated by the elastic body can be effectively utilized to enhance the vibration damping effect.

[0019] In one or more embodiments of the present disclosure, the rotation axis of the motor may extend along the vertical direction together with the gripping portion. With this configuration of the striking tool, the motor can be easily housed within the vertical region in which the gripping portion extends. Therefore, the configuration of the striking tool can be made more compact.

[0020] In one or more embodiments of the present disclosure, the drive body housing may be provided with a battery mounting section into which a battery that supplies power to the motor is mounted. With this configuration, vibrations generated during operation are suppressed from being transmitted to the battery, thereby suppressing problems such as the battery falling out due to vibration or the battery being damaged due to vibration.

[0021] Hereinafter, with reference to the drawings, representative and non-limiting embodiments of this disclosure will be described in detail.

[0022] 1. Embodiments: 1-1. Overview of the configuration of the striking tool: First, the schematic configuration of the striking tool 10 of this embodiment will be described with reference to Figure 1. Figure 1 shows arrows indicating three mutually orthogonal directions related to the striking tool 10, defined for the convenience of this specification: the "front-back direction," the "up-down direction," and the "left-right direction."

[0023] The "front-to-back direction" corresponds to the longitudinal direction of the striking tool 10, with the side to which the tip tool TT is attached being the front end and the side to which the gripping portion 18 is provided being the rear end. The front-to-back direction also corresponds to the "driving direction" in which the tip tool TT of the striking tool 10 is driven by reciprocating motion. The "up-down direction" is the direction perpendicular to the front-to-back direction. In the striking tool 10 of this embodiment, the up-down direction corresponds to the direction in which the gripping portion 18, described later, extends. The "left-to-right direction" is the direction perpendicular to the front-to-back direction and the up-to-down direction.

[0024] The arrows indicating the three directions—forward / backward, up / down, and left / right—are also shown in the figures referenced later in this specification, as appropriate, corresponding to Figure 1. Note that "up," "down," "left," and "right" in the "up / down" and "left / right" directions are used as concepts indicating opposite directions and do not limit the orientation of the striking tool 10 in use or placement.

[0025] The striking tool 10 is a type of handheld electric tool. In this embodiment, the striking tool is an electric hammer and is used, for example, for chipping work. The striking tool 10 uses the driving force of the motor 21 to drive the tip tool TT attached to its end in the forward and backward direction on the drive shaft DX, which is shown by a dashed line in Figure 1 and will be described later, to strike a workpiece (not shown) as the workpiece to be processed. The tip tool TT is a so-called hammer bit and is made of, for example, a shaft-shaped steel material with a reduced diameter at the tip. In Figure 1, for convenience, only the position of the base end of the tip tool TT when it is attached to the striking tool 10 is shown by a dashed line.

[0026] The striking tool 10 includes a drive body 11 for driving the tip tool TT. The drive body 11 has a tool mounting section 12 at its tip onto which the tip tool TT is attached. The tool mounting section 12 has a cylindrical structure that opens forward to allow insertion of the tip tool TT. The central axis of the tool mounting section 12 coincides with the drive shaft DX. The tool mounting section 12 is configured to allow the tip tool TT to be fixed and released by the user.

[0027] The drive body 11 further includes a drive shaft 13 extending axially in the front-rear direction at its tip, and a drive mechanism 20 positioned at the rear end of the drive shaft 13 and connected to it. The tip of the drive shaft 13 is provided with the tool mounting section 12 described above. The central axis of the drive shaft 13 corresponds to the drive shaft DX of the striking tool 10. The drive shaft 13 has an internal mechanism that transmits the driving force that drives the tip tool TT to the tool mounting section 12. The drive mechanism 20 includes a motor 21 and transmits the driving force generated by the motor to the drive shaft 13. The configuration of the drive body 11, including the drive shaft 13 and the drive mechanism 20, will be described later.

[0028] The striking tool 10 further includes a drive body housing 15 positioned at the rear end of the tool mounting portion 12, which houses and holds a portion of the drive body portion 11. The drive body housing 15 has a rear end housing 16 and a front end housing 17, which constitute part of the exterior of the striking tool 10. The rear end housing 16 houses at least the rear end of the drive body portion 11 towards the front end. The front end housing 17 is connected to the front end of the rear end housing 16 and houses a portion of the drive body portion 11. In this embodiment, the drive shaft portion 13 of the drive body portion 11 protrudes forward from the front end of the front end housing 17.

[0029] The drive unit housing 15 has a gripping portion 18 for the user to grasp. The gripping portion 18 is provided at the rear end of the rear end housing 16. The gripping portion 18 is configured as a columnar part that extends vertically and intersects with the drive shaft DX. The gripping portion 18 has a thickness that allows the user to grasp it.

[0030] The gripping portion 18 is provided at both ends in the vertical direction and is connected to the rear end of the rear end housing 16 via a pair of connecting ends 18a and 18b that extend forward. In this embodiment, an operating switch portion 80 is provided on the side surface of the upper connecting end portion 18a. The operating switch portion 80 will be described later.

[0031] In this embodiment, the drive body housing 15 functions as a vibration-damping housing for the striking tool 10. The drive body housing 15 is connected to the drive body 11 so as to be movable by a predetermined distance in the front-rear direction, and reduces vibrations transmitted from the drive body 11 to the gripping part 18 during operation by utilizing the elastic force of an elastic body, which will be described later. The configuration for making the drive body housing 15 function as a vibration-damping housing will be described later.

[0032] In this embodiment, the drive body housing 15 is fitted with a tip-side gripping portion 18F that is gripped by the user. The tip-side gripping portion 18F is attached to the cylindrical portion at the tip end of the tip-side housing 37. Because the drive body housing 15 functions as a vibration-damping housing, vibrations transmitted from the drive body 11 to the tip-side gripping portion 18F are also reduced. The length of the columnar portion of the tip-side gripping portion 18F that is gripped by the user is smaller than the vertical length of the gripping portion 18. The tip-side gripping portion 18F is configured to be removable from the striking tool 10. The tip-side gripping portion 18F is rotatable in the front-rear direction in a lever manner relative to its mounting position on the tip-side housing 37. Furthermore, the mounting position of the tip-side gripping portion 18F can be changed around the drive shaft DX.

[0033] The drive unit housing 15 is provided with a battery mounting section 19 into which a battery BT, which serves as the power source for the striking tool 10, is detachably mounted. The battery mounting section 19 is located at the rear end of the rear end housing 16 and is positioned in front of the gripping section 18. The battery BT is mounted in the battery mounting section 19 between the rear end housing 16 and the gripping section 18. In this embodiment, two batteries BT are mounted in the battery mounting section 19 in an arrangement adjacent to each other in the vertical direction.

[0034] If the drive unit housing 15, which functions as a vibration-damping housing, is equipped with a battery mounting section 19, then vibrations generated during operation can be suppressed from being transmitted to the battery BT. Therefore, problems such as the battery BT falling out due to vibration, damage to the battery BT due to vibration, and disconnection of the battery BT's connection wiring due to vibration can be suppressed.

[0035] The striking tool 10 includes an illumination unit 70 that emits illumination light to improve the user's visibility during operation. The illumination unit 70 has a light-emitting element 71 positioned to irradiate light toward the workpiece. In this embodiment, the light-emitting element 71 is provided on an outer wall surface 72 facing the tip side, located at the upper end in the vertical direction. Details of the illumination unit 70 will be described later.

[0036] 1-2. Overview of the drive unit housing and the configuration of the drive unit: Referring to Figures 2 and 3, the general configuration of the rear end housing 16 of the drive body housing 15, the general configuration of the drive body 11, and the general configuration of the front end housing 17 of the drive body housing 15 will be explained in order. In Figure 2, for convenience, the front end gripping part 18F and the battery BT are omitted from the illustration. Also in Figure 2, the state in which the front end housing 17 is attached to the drive body 11 is shown. In Figure 3, for convenience, the drive body 11 and the front end housing 17 are shown with solid lines, and the rear end housing 16 and the battery BT are shown with dashed lines.

[0037] First, let's describe the general configuration of the rear end housing 16.

[0038] As shown in Figure 2, the outer wall member constituting the rear end housing 16 is configured as a pair of divided outer wall members 16a and 16b that can be divided in a dividing direction perpendicular to the front-rear direction. In this embodiment, the dividing direction of the divided outer wall members 16a and 16b coincides with the left-right direction. Also, the position of the dividing boundary of the divided outer wall members 16a and 16b corresponds to the center of the rear end housing 16 in the left-right direction. The first divided outer wall member 16a constitutes the right side of the striking tool 10, and the second divided outer wall member 16b constitutes the left side of the striking tool 10.

[0039] The rear end portion of the drive body portion 11 is sandwiched in the dividing direction by a pair of divided outer wall members 16a and 16b, and the pair of divided outer wall members 16a and 16b are joined together to form a rear end housing 16 that covers the side portion of the rear end portion of the drive body portion 11. After the rear end housing 16 is formed, the front end housing 17 is connected from the front end and the gripping portion 18 is connected from the rear end to form the drive body housing portion 15.

[0040] In the striking tool 10, the internal structure can be accessed by separating the pair of divided outer wall members 16a and 16b. Therefore, the installation of internal components such as electrical components is made easier. Examples of electrical components include a control board that has an integrated circuit and constitutes the control unit (controller) 65 of the striking tool 10, light-emitting elements 71 and electrical wiring of the lighting unit 70, electrical wiring connected to the battery mounting unit 19 and the operation switch unit 80, various electronic circuits and circuit elements.

[0041] Furthermore, as will be described later, in the striking tool 10, the rear end housing 16 is constructed by a pair of divided outer wall members 16a and 16b, which facilitates the fixing of the elastic body for forming the vibration-damping housing to the rear end housing 16. Therefore, the vibration-damping housing can be easily constructed. Although not shown in the figures, in order to construct the vibration-damping housing, a restricting portion is provided inside the rear end housing 16 that abuts against the drive body portion 11 and defines the range in which the drive body housing portion 15 moves relative to the drive body portion 11.

[0042] Inside the rear-end housing 16, a cooling air passage is configured for introducing cooling air to the drive body 11. In this embodiment, the cooling air passage is configured to introduce cooling air into the motor housing 23 of the drive body 11. In the striking tool 10, the rear-end housing 16 is composed of a pair of divided outer wall members 16a and 16b, which facilitates the assembly of the passage members 50 that constitute the cooling air passage. Furthermore, as will be described later, in the striking tool 10 of this embodiment, the control board that constitutes the control unit 65 is installed in the cooling air passage, and the assembly of the control unit 65 into the cooling air passage is also facilitated. Figure 3 shows the installation positions of the passage members 50 and the control unit 65 within the drive body housing 15. Details of the cooling air passage will be described later.

[0043] As described above, the striking tool 10 is provided with an illumination unit 70 having a light-emitting element 71. Figure 3 shows the installation position of the light-emitting element 71 within the rear end housing 16 of the drive body housing 15. In the striking tool 10, the rear end housing 16 is composed of a pair of divided outer wall members 16a and 16b, which facilitates the arrangement of the light-emitting element 71 and electrical wiring (not shown) connected to the light-emitting element 71. Further details of the illumination unit 70 will be described later.

[0044] Next, we will explain the general configuration of the drive unit 11.

[0045] As shown in Figure 2, a motor housing 23 for housing the motor 21 of the drive mechanism 20 is provided at the rear end of the drive body 11. A communication opening 24 is formed at the upper end of the motor housing 23, which communicates with the internal space of the motor housing 23. As shown in Figure 3, a flow path member 50, which will be described later, is attached to the communication opening 24 to form a flow path for cooling air.

[0046] In the impact tool 10, the tool mounting section 12, the motor housing section 23, and the gripping section 18 are arranged so that they overlap each other when viewed in the front-to-back direction, and the battery mounting section 19 is provided between the motor housing section 23 and the gripping section 18. This configuration realizes a rechargeable impact tool 10 that is handheld and compact.

[0047] The drive body 11 has a transmission mechanism 25 located on the tip side of the motor housing 23 that transmits the driving force of the motor 21 to the drive shaft 13. The transmission mechanism 25, together with the motor 21, constitutes the drive mechanism 20. In the striking tool 10, the drive shaft 13, the transmission mechanism 25, and the motor 21 are arranged in a line on the drive shaft DX. The internal configuration of the drive shaft 13 and the drive mechanism 20 will be described later.

[0048] The drive body 11 is provided with an elastic mechanism 30 to allow the drive body 11 to function as a vibration-damping housing. In this embodiment, a plurality of elastic mechanisms 30 are provided on the side surface of the rear end of the drive body 11. The elastic mechanism 30 has an elastic body 31 that elastically deforms when the drive body 11 moves in the front-rear direction relative to the rear end housing 16 of the drive body housing 15, generating an elastic force in the front-rear direction that repels the movement.

[0049] In this embodiment, the elastic mechanism 30 can impart the elastic force of the elastic body 31 to the drive body 11 by having its leading end fixed to the drive body 11. Furthermore, the elastic mechanism 30 can impart elastic force to the drive body housing 15 by having its rear end fixed to the inner wall surface of the divided outer wall members 16a and 16b described above.

[0050] As will be described later, the rear end of the elastic mechanism 30 is fixed to the divided outer wall members 16a and 16b by being fitted and engaged in the direction of division with an engaging portion 33 provided on the inner wall surface of the pair of divided outer wall members 16a and 16b. In this embodiment, the cylindrical member 35 that constitutes the rear end of the elastic mechanism 30 is engaged with the engaging portion 33. Details of the elastic mechanism 30 and the engaging portion 33 of the divided outer wall members 16a and 16b will be described later.

[0051] A guide member 34 is fixed to the drive body 11, which constitutes a guide mechanism that guides the movement of the drive body housing 15 when it moves in the front-rear direction relative to the drive body 11 as a vibration-damping housing. In this embodiment, the guide member 34 is provided on the side surface of the rear end of the drive body 11. In this embodiment, the guide mechanism composed of the guide member 34 is integrated with the elastic mechanism 30 described above, and the guide member 34 constitutes a part of the elastic mechanism 30. Details of the guide member 34 will be described later along with the elastic mechanism 30.

[0052] The front-end housing 17 of the drive body housing 15 will now be described. The front-end housing 17 houses the rear end of the drive shaft 13 and the front end of the transmission mechanism 25. As described above, the front-end housing 17 is connected to the front end of the rear-end housing 16. As shown in Figure 2, the front-end housing 17 is provided with a through hole 17s through which a screw for connection with the rear-end housing 16 is inserted. The rear-end housing 16 is also provided with a screw hole 16s through which the tip of the screw inserted into the through hole 17s is threaded. By being connected to the rear-end housing 16, the front-end housing 17 constitutes part of the vibration-damping housing. As described above, since the front-end gripping portion 18F is attached to the front-end housing 17, the transmission of vibrations during operation is suppressed.

[0053] 1-3. Internal mechanism of the drive unit: Referring to Figure 4, the internal mechanisms of the drive mechanism 20 and the drive shaft 13 in the drive body 11 will be explained.

[0054] As described above, the drive mechanism 20 includes a motor 21 and a transmission mechanism 25. In this embodiment, the rotation axis 21x of the motor 21 is arranged vertically so as to intersect with the drive axis DX. As can be seen from Figures 2, 3, and 4, the rotation axis 21x of the motor 21 extends vertically together with the gripping portion 18 and extends almost parallel to the gripping portion 18. With this configuration, it is easy to reduce the front-to-back dimension of the motor 21's placement area while ensuring that the motor 21's placement area fits within the vertical area where the gripping portion 18 extends. Therefore, it is easy to efficiently secure the placement area of ​​the motor 21 in the striking tool 10, and the striking tool 10 can be made compact.

[0055] The transmission mechanism 25 includes a reduction gear 41 connected to the motor 21 and a motion conversion mechanism 42 connected to the reduction gear 41. The reduction gear 41 is located below the drive shaft DX and is connected to the lower end of the rotation shaft 21x of the motor 21. The reduction gear 41 has multiple gears, and the combination of these gears adjusts the torque of the rotational motion transmitted from the rotation shaft 21x of the motor 21 and transmits it to the motion conversion mechanism 42.

[0056] The motion conversion mechanism 42 is located in front of the motor 21 and above the reduction gear 41, in the region through which the drive shaft DX passes. The motion conversion mechanism 42 has a crank gear and converts the rotational motion transmitted from the reduction gear 41 into reciprocating linear motion in the direction along the drive shaft DX and transmits it to the drive shaft section 13.

[0057] The drive shaft section 13 contains, internally, a striking mechanism 43 for driving the tip tool TT, and a dynamic vibration absorber 44 that vibrates to counteract the vibrations associated with driving the tip tool TT. The striking mechanism 43 and the dynamic vibration absorber 44 are each supplied with reciprocating linear motion driving force from the motion conversion mechanism 42. The striking mechanism 43 and the dynamic vibration absorber 44 will be described in turn below.

[0058] The striking mechanism 43 comprises a cylinder 43a, a connecting rod 43b, a piston 43c, a striker 43d, and an impact bottle 43e. The cylinder 43a is made up of a cylindrical member with open ends. The cylinder 43a is positioned so that its central axis coincides with the drive shaft DX. Inside the cylinder 43a, the connecting rod 43b, the piston 43c, and the striker 43d are arranged in this order from the rear end to the front end.

[0059] The connecting rod 43b is positioned so that its central axis coincides with the drive shaft DX. The rear end of the connecting rod 43b is connected to the motion conversion mechanism 42, and the front end is connected to the piston 43c. The piston 43c is positioned inside the cylinder 43a with its side surface in airtight contact with the inner wall surface of the cylinder 43a. The piston 43c reciprocates in the forward and backward direction within the cylinder 43a by the driving force transmitted from the motion conversion mechanism 42 via the connecting rod 43b.

[0060] The striker 43d is composed of a cylindrical member and is positioned inside the cylinder 43a such that its central axis coincides with the drive shaft DX. The striker 43d is positioned in the front-end space inside the cylinder 43a with its side surface in airtight contact with the inner wall surface of the cylinder 43a. The striker 43d is movable in the front-rear direction within the cylinder 43a.

[0061] An air chamber 43f, which functions as an air spring, is formed between the striker 43d and the piston 43c. Driving force is transmitted to the striker 43d from the piston 43c via the air in the air chamber 43f.

[0062] The impact bottle 43e is held at the tip of the cylinder 43a. The central axis of the impact bottle 43e coincides with the drive shaft DX. The tip of the impact bottle 43e is connected to the rear end of the tool mounting section 12. The rear end of the impact bottle 43e is inserted into the cylinder 43a so as to be able to contact the tip of the striker 43d.

[0063] The striker 43d moves in the direction of the drive axis DX by the driving force transmitted from the piston 43c via the air chamber 43f and strikes the rear end of the impact bottle 43e. The impact force generated in the impact bottle 43e by this strike is transmitted to the rear end of the tip tool TT mounted on the tool mounting section 12, causing the tip tool TT to strike the workpiece.

[0064] The dynamic vibration absorber 44 is located above the motion conversion mechanism 42. The dynamic vibration absorber 44 comprises a compression coil spring and a weight. The dynamic vibration absorber 4 actively vibrates the weight to counteract the vibrations generated in the striking mechanism 43 by the driving force transmitted from the motion conversion mechanism 42 via the compression coil spring. In the striking tool 10, the presence of the dynamic vibration absorber 44 suppresses the generation of vibrations during operation.

[0065] 1-4. Elastic mechanism for constructing a vibration-damping housing: 1-4-1. Structure of the elastic mechanism: Referring to Figures 5 and 6, the configuration of the elastic mechanism 30 that the striking tool 10 has inside the rear end housing 16 will be described.

[0066] As described above, the striking tool 10 is equipped with an elastic mechanism 30 for the drive body housing 15 to function as a vibration-damping housing. Furthermore, as described above, the elastic mechanism 30 in this embodiment is integrated with a guide mechanism that guides the forward and backward movement of the drive body housing 15 relative to the drive body 11, and the guide member 34 that constitutes the guide mechanism forms part of the elastic mechanism 30. Below, the configuration of the guide mechanism using the guide member 34 will be described first, followed by the configuration of the elastic mechanism 30.

[0067] The guide member 34 is arranged along the front-rear direction on the side surface of the drive body 11. In this embodiment, the guide shaft member 34 is composed of an axial member. In this embodiment, multiple guide members 34 are arranged parallel to each other so as to surround the side surface of the drive body 11 around the drive shaft DX. The multiple guide members 34 are arranged around the motor housing 23 provided at the rear end of the drive body 11. More specifically, there are four guide members 34, which are installed at the four corners (top, bottom, left, and right) around the motor housing 23.

[0068] The front and rear ends of the guide member 34 are fixed to the drive body 11. As shown in Figure 6, the front end of the guide member 34 is inserted into and fixed to a hole provided in the wall surface facing the rear end of the drive body 11. The rear end of the guide member 34 is inserted into and fixed to a hole provided in a rectangular plate-shaped base member 47 which is fixed to the rear end of the motor housing 23 of the drive body 11.

[0069] The drive body housing 15 is connected to the guide member 34 fixed to the drive body 11 in a manner that allows movement in the front-rear direction. In this embodiment, a cylindrical member 35 is used to connect the drive body housing 15 to the guide member 34. The cylindrical member 35 is an element that constitutes the guide mechanism.

[0070] The cylindrical member 35 has a cylindrical main body portion 35s, and an annular flange portion 35e with a larger diameter than the main body portion 35s is provided at the tip end of the main body portion 35s. The main body portion 35s has a cylindrical hole that penetrates along the central axis. By inserting the guide member 34 through the cylindrical hole, the cylindrical member 35 is attached to the guide member 34 in a state that allows it to slide along the guide member 34 in the front-rear direction.

[0071] The drive body housing 15 is connected to the guide member 34 by the engagement portion 33 provided on the inner wall surface of the divided outer wall members 16a and 16b shown in Figure 2 engaging with the main cylindrical portion 35s of the cylindrical member 35. As a result, the drive body housing 15 can move in the front-rear direction relative to the drive body 11 while being guided by the guide member 34.

[0072] The cylindrical member 35 described above can be made of a resin material. It is preferable that the cylindrical member 35 be made of a material with a low coefficient of friction so that it can slide smoothly against the guide member 34. The cylindrical member 35 can be made of, for example, polyacetal resin (POM resin).

[0073] Next, the elastic mechanism 30 will be described. As described above, the elastic mechanism 30 has an elastic body 31 that elastically deforms when the drive body housing 15 moves in the front-rear direction relative to the drive body 11, and generates an elastic force in the front-rear direction that rebounds in the direction of movement. The elastic body 31 is installed on the drive body 11 in a manner that allows elastic force to be applied to the drive body 11 at its front end. The elastic body 31 is also fixed to the rear end housing 16 of the drive body housing 15 so that elastic force can be applied to the drive body housing 15 at its rear end. As a result, the elastic force of the elastic body 31 can absorb and reduce vibrations transmitted from the drive body 11 to the gripping portion 18 of the drive body housing 15 when the striking tool 10 is driven.

[0074] Preferably, the elastic body 31 is installed inside the drive body housing in a state in which an elastic force acting in the front-rear direction is generated. In this embodiment, the elastic body 31 is incorporated into the elastic mechanism 30 in a state compressed from its free length. With this configuration, the elastic force of the elastic body 31 suppresses the movement of the cylindrical member 34 in the initial state before the striking tool 10 starts to drive. Therefore, the occurrence of rattling of the cylindrical member 34 in that initial state can be suppressed. In addition, when vibration occurs in the striking tool 10, the elastic force of the elastic body 31 can be increased immediately. Thus, the vibration reduction effect of the elastic mechanism can be further enhanced.

[0075] In this embodiment, the elastic body 31 is composed of a compression coil spring and is arranged so that its elastic deformation is in the front-rear direction. The elastic body 31 is provided on the outer circumference of the guide member 34 described above. The elastic body 31 is installed so as to be wound around the outer circumference of the guide member 34.

[0076] The elastic body 31 is positioned so that its leading end contacts the drive body 11 while being held by the guide member 34. This allows the elastic mechanism 30 to impart the elastic force of the elastic body 31 to the drive body 11 at its leading end. The elastic body 31 is also positioned so that its rear end contacts the leading end of the cylindrical member 35. This allows the elastic mechanism 30 to impart the elastic force of the elastic body 31 to the drive body housing 15 through the cylindrical member 35 that constitutes the rear end of the elastic mechanism 30.

[0077] Refer to Figure 7. The upper part of Figure 7 shows the state when the drive body housing 15 has moved to its rearmost limit position relative to the drive body 11. The state shown in the upper part of Figure 7 is also the initial state before the start of operation of the striking mechanism 10. The lower part of Figure 7 shows the state when the drive body housing 15 has moved to its frontmost limit position relative to the drive body 11.

[0078] When the drive body housing 15 moves rearward relative to the drive body 11, the elastic body 31 extends, and the cylindrical member 35 moves towards the rear end along the guide member 34 while engaged with the engaging portion 33 of the rear end housing 16. When the drive body housing 15 moves forward relative to the drive body 11, the elastic body 31 contracts, and the cylindrical member 35 moves towards the front end along the guide member 34 while engaged with the engaging portion 33 of the rear end housing 16.

[0079] Thus, according to the elastic mechanism 30 of this embodiment, the elastic deformation of the elastic body 31 is guided and smoothed by the guide member 34. Therefore, the vibration reduction effect of the elastic mechanism 30 can be further enhanced. Furthermore, according to the elastic mechanism 30 of this embodiment, since the movement of the cylindrical member 35 in the front-rear direction is guided by the guide member 34, the elastic force of the elastic body 31 can be appropriately applied to the rear end housing 16.

[0080] Furthermore, by using the cylindrical member 35 to form the rear end of the elastic mechanism 30, the fixing of the elastic mechanism 30 to the engaging portion 33 of the divided outer wall members 16a and 16b can be made easier, as described below. Therefore, the ease of assembling the elastic mechanism 30 to the striking tool 10 can be further improved.

[0081] 1-4-2. Engaging portion of the drive unit housing: The configuration of the engagement portion 33 of the drive body housing 15 will be explained with reference to Figures 2, 8A, and 8B. Figure 8A shows the state before the cylindrical member 35 of the elastic mechanism 30 is engaged with the engagement portion 33, and Figure 8B shows the state after the cylindrical member 35 is engaged with the engagement portion 33.

[0082] As shown in Figure 2, the inner wall surfaces of the pair of divided outer wall members 16a and 16b that constitute the rear end housing 16 of the drive body housing 15 are provided with engaging portions 33 at positions corresponding to the rear end of the elastic mechanism 30. As shown in Figure 8A, the engaging portion 33 has a substantially semicircular cross-sectional shape that opens in the dividing direction and has a groove portion 33g that extends in the front-rear direction. As shown in Figure 8B, the engaging portion 33 engages with the cylindrical member 35 by receiving the main cylindrical portion 35s of the cylindrical member 35 into the groove portion 33g in the dividing direction.

[0083] According to the striking tool 10 of this embodiment, when a pair of divided outer wall members 16a and 16b are joined in the dividing direction to form the rear end housing 16, the cylindrical member 35 that constitutes the rear end of the elastic mechanism can be fitted into the engaging portion 33 in the dividing direction and engaged. This makes it easy to fix the rear end of the elastic mechanism 30 to the rear end housing 16, and thus makes it easy to configure the rear end housing 16 as a vibration-damping housing.

[0084] Furthermore, the configuration of the engaging portion 33 having the groove 33g described above makes it even easier to fit and engage the cylindrical member 35 in the dividing direction. Therefore, the vibration-damping housing of the striking tool 10 can be constructed more simply.

[0085] The length of the engaging portion 33 in the front-rear direction is approximately the same as the length of the main cylindrical portion 35s, which is the engaged portion of the cylindrical member 35 that engages with the engaging portion 33. This configuration enhances the fixation of the cylindrical member 35 to the engaging portion 33. Therefore, it is possible to suppress instability in the installation state of the elastic mechanism 30 within the rear end housing 16, and to further enhance the vibration reduction effect of the elastic mechanism 30. In addition, the semicircular diameter of the groove portion 33g of the engaging portion 33 is approximately the same as, or slightly smaller than, the diameter of the main cylindrical portion 35s. This configuration enhances the fixation of the cylindrical member 35 to the engaging portion 33.

[0086] As described above, in this embodiment, a flange portion 35e is provided at the tip end of the cylindrical member 35. The flange portion 35e supports the end of the elastic body 31 when it is compressed to a length shorter than its free length, making it easy to engage the main cylindrical portion 35s of the cylindrical member 35 with the engaging portion 33 while the elastic body 31 is in a compressed state. In addition, the flange portion 35e functions as a locking portion that engages with the side surface of the engaging portion 33. Therefore, the elastic force of the elastic body 31 can be transmitted more reliably to the drive body housing portion 15 through the engaging portion 33. Furthermore, the flange portion 35e also functions as a positioning portion when engaging the cylindrical member 35 with the engaging portion 33.

[0087] 1-4-3. Arrangement configuration of the elastic mechanism: Refer to Figure 9. Figure 9 shows the rear end of the drive body 11 with the base member 47 omitted. Overlaid on the drive body 11, the area where the gripping portion 18 of the striking tool 10 is located is shown by a dashed line, and the area where the tool mounting portion 12 is located is shown by a double dashed line.

[0088] In this embodiment, multiple elastic mechanisms 30 are provided. As shown in Figure 9, the elastic mechanisms 30 are provided on both sides in the left-right direction, flanking the gripping portion 18. Preferably, when the striking tool 10 is viewed in the front-rear direction, the elastic mechanisms 30 are arranged symmetrically in the left-right direction with respect to the gripping portion 18. With this configuration, the elastic force of the elastic mechanisms 30 can be generated in a balanced manner on both sides in the left-right direction, flanking the gripping portion 18. Therefore, the vibration reduction effect of the elastic mechanisms 30 can be further enhanced. In addition, the striking tool 10 can be driven in a more stable posture.

[0089] At least four elastic mechanisms 30 are provided, preferably with at least two arranged vertically on both sides of the gripping portion 18 in the left-right direction. This configuration allows for a balanced arrangement of multiple elastic mechanisms 30 in the left-right and vertical directions, enabling the striking tool 10 to be driven in a more stable posture. In this embodiment, there are four elastic mechanisms 30, arranged two vertically on both sides of the gripping portion 18 in the left-right direction. This configuration allows for a balanced arrangement of the elastic mechanisms 30 in the left-right and vertical directions, centered on the tip tool TT mounted on the tool mounting portion 12, while suppressing a significant increase in the number of elastic mechanisms 30. Therefore, the vibration reduction effect of the elastic mechanisms 30 can be enhanced with a smaller number of elastic mechanisms 30. When the striking tool 10 is viewed in the front-rear direction, it is preferable that the multiple elastic mechanisms 30 are arranged to surround the tool mounting portion 12. This configuration allows the elastic mechanisms 30 to absorb vibrations of the tip tool 30 in a more balanced manner.

[0090] Refer to Figure 5. In this embodiment, multiple elastic mechanisms 30 are arranged parallel to each other so as to surround the side surface of the drive body 11 around the drive shaft DX. With this configuration, the front-rear dimensions of the striking tool 10 can be reduced compared to when the elastic mechanisms 30 are provided on the rear end side of the drive body 11. Furthermore, since the front-rear length of the elastic body 31 can be increased while suppressing an increase in the front-rear dimensions of the striking tool 10, it is easy to generate an appropriate elastic force in the elastic body 31.

[0091] In this embodiment, four elastic mechanisms 30 are installed at the four corners (top, bottom, left, and right) around the motor housing 23. This configuration allows for effective use of the space around the motor housing 23 within the rear end housing 16, thereby enabling a more compact striking tool 10.

[0092] 1-4-4. Summary of elastic mechanisms for constructing vibration-damping housings: As described above, with the striking tool 10 of this embodiment, when the divided outer wall members 16a and 16b constituting the rear end housing 16 are separated, internal components such as electrical components can be easily assembled inside the drive body housing 15. Furthermore, when the divided outer wall members 16a and 16b are joined in the dividing direction to form the rear end housing 16, the rear end of the elastic mechanism 30 can be easily engaged with the engaging portion 33 on the inner wall surface of the divided outer wall members 16a and 16b to fix them in place. Therefore, the rear end housing 16 can be easily configured as a vibration-damping housing.

[0093] 1-5. Cooling airflow path: 1-5-1. Cooling airflow path configuration: Refer to Figure 10. Figure 10 shows the internal structure of the striking tool 10 in the area where the cooling airflow channel is formed, after removing the first segmented outer wall member 16a at the front. Figure 10 also shows a dashed arrow AF indicating the flow of the cooling air.

[0094] Each of the pair of divided outer wall members 16a and 16b (hereinafter also simply referred to as "outer wall members 16a and 16b") of the drive unit housing 15 is provided with an air intake port 55 for drawing outside air into the interior of the striking tool 10. The air intake port 55 is located on the upper side of the motor housing 23. Inside the outer wall members 16a and 16b, there is an air intake side passage wall portion 57w that constitutes an air intake side passage 57 that forms an airflow toward the motor housing 23.

[0095] Between the pair of divided outer wall members 16a and 16b, a flow path member 50 is positioned to connect the downstream end of the intake-side flow path 57 to the motor housing 23. The configuration of the flow path member 50 will be described later. A control unit 65 is also positioned in the intake-side flow path 57. The positioning of the control unit 65 in the intake-side flow path 57 will also be described later.

[0096] The outer wall members 16a and 16b are provided with exhaust-side passage wall portions 58w, which constitute an exhaust-side passage 58 for releasing air that has flowed from the intake-side passage 57 into the drive body 15 to the outside. In this embodiment, the exhaust-side passage 58 is located on the opposite side of the intake-side passage 57, with the motor housing 23 in between. The outer wall members 16a and 16b have exhaust ports 56 that communicate with the exhaust-side passage 58.

[0097] In this embodiment, a cooling air passage, indicated by the dashed arrow AF, is formed inside the drive body housing 15 of the impact tool by an intake-side passage 57, a passage member 50, and an exhaust-side passage 58. Air flowing from the intake port 55 into the intake-side passage 57 flows through the passage member 50 to the motor housing 23, where it exchanges heat with the motor 21 to cool the motor 21. After heat exchange in the motor housing 23, the air flows out from the motor housing 23 to the exhaust-side passage 58 and is discharged from the exhaust-side passage 58 to the outside of the drive body housing 15 through the exhaust port 56. In this embodiment, the exhaust port 56 is provided on the tip side of the motor housing 23 and the transmission mechanism 25. This allows the cooling air that has cooled the components of the drive body 15 located on the tip side of the motor housing 23, such as at least a part of the impact mechanism 43, to be discharged from the exhaust port 56.

[0098] 1-5-2. Configuration of flow path components: Figure 11 shows an example of a flow channel member 50. Figure 11 shows arrows indicating the front-rear and up-down directions, based on the orientation of the flow channel member 50 when it is installed inside the drive body housing 15. The flow channel member 50 is made of a flexible cylindrical member. The flow channel member 50 has a first opening 51 and a second opening 52 at both ends.

[0099] As shown in Figure 10, the first opening 51 of the flow path member 50 is open in a direction that intersects the front-rear direction with respect to the outlet opening 57e of the intake side flow path 57. In this embodiment, the outlet opening 57e of the intake side flow path 57 is open in the vertical direction. The first opening 51 of the flow path member 50 is airtightly connected to the outlet opening 57e.

[0100] On the other hand, the second opening 52 of the flow path member 50 is open in a direction that intersects the front-rear direction with respect to the communication port 24 that communicates with the inside of the motor housing 23. As shown in Figures 2 and 5, the communication port 24 of the motor housing 23 is open in the vertical direction. As shown in Figure 10, the second opening 52 of the flow path member 50 is airtightly connected to the communication port 24 of the motor housing 23. The second opening 52 of the flow path member 50 is fitted into and fixed in the communication port 24 of the motor housing 23.

[0101] In the striking tool 10, the outlet opening 57e of the intake-side passage 57 and the communication port 24 of the motor housing 23 are connected via an airtight passage formed by the passage member 50. This allows air from the intake-side passage 57 to be efficiently delivered into the motor housing 23 while suppressing air leakage. Therefore, the cooling efficiency of the motor 21 by the cooling air can be increased.

[0102] The upper part of Figure 12 shows the state in which the drive body housing 15 has been displaced to its limit position on the front end relative to the drive body 11. On the other hand, the lower part of Figure 12 shows the state in which the drive body housing 15 has been displaced to its limit position on the rear end relative to the drive body 11.

[0103] As described above, in the striking tool 10, the drive body 11 is configured as a vibration-damping housing that is connected to the drive body housing 15 so as to be movable in the front-rear direction while receiving an elastic force. When the striking tool 10 is driven, as shown in Figure 12, the drive body 11 and the drive body housing 15 move relative to each other in the front-rear direction, causing the position of the motor housing 23 inside the drive body housing 15 to be displaced in the front-rear direction. Therefore, when the striking tool 10 is driven, the outlet opening 57e of the intake side passage 57 and the communication port 24 of the motor housing 23 are displaced relative to each other in the front-rear direction.

[0104] The flow path member 50 is flexible and can bend and deform so that the first opening 51 and the second opening 52 are displaced relative to each other in the front-rear direction. Therefore, even if the drive body 11 is displaced in the front-rear direction relative to the drive body housing 15, and the front-rear positional relationship between the outlet opening 57e of the intake-side flow path 57 and the communication port 24 of the motor housing 23 changes, the flow path member 50 can follow the change and bend and deform. Thus, even when vibration is generated in the striking tool 10, the flow path member 50 can maintain the connection between the intake-side flow path 57 and the motor housing 23, and can maintain the supply path of cooling air to the motor housing 23.

[0105] Furthermore, as described above, the first opening 51 and the second opening 52 of the flow path member 50 are connected to the outlet opening 57e of the intake-side flow path 57 and the communication port 24 of the motor housing 23 in a direction that intersects the front-rear direction. With this configuration, the diameters of the first opening 51 and the second opening 52 can be increased. Therefore, by increasing the diameters of the first opening 51 and the second opening 52, the airflow rate of the cooling air can be increased, and the cooling efficiency by the cooling air can be improved. In addition, the first opening 51 and the second opening 52 of the flow path member 50 are less likely to detach from the outlet opening 57e of the intake-side flow path 57 and the communication port 24 of the motor housing 23 even if vibrations occur in the front-rear direction. Therefore, the influence of vibrations during the operation of the striking tool 10 on the cooling air flow path is suppressed.

[0106] In this embodiment, the opening direction of the first opening 51 and the opening direction of the second opening 52 of the flow path member 50 are parallel to each other, and the connection direction of the first opening 51 of the flow path member 50 to the outlet opening 57e and the connection direction of the second opening 52 to the communication port 24 are parallel to each other. With this configuration, when the drive body 11 is displaced in the front-rear direction relative to the drive body housing 15, it is possible to suppress an imbalance in the deformation of the flow path member 50 between the first opening 51 side and the second opening 52 side. Therefore, the deflection deformation of the flow path member 50 when the striking tool 10 is driven can be smoothed, and the influence of vibrations during driving on the cooling air flow path can be further reduced.

[0107] As shown in Figure 11, the flow path member 50 has an opening member 53 as a skeletal member in the first opening 51. The opening member 53 has an annular shape and constitutes the peripheral edge of the first opening 51. The opening member 53 also has rigidity that can maintain the opening shape of the first opening 51. With this configuration, the opening shape of the first opening 51 is maintained even before the flow path member 50 is assembled to the striking tool 10, making it easier to assemble the flow path member 50 to the drive body housing 15. Furthermore, deformation of the first opening 51 can be suppressed even after assembly, thus preventing the first opening 51 from closing due to deformation of the flow path member 50 when vibration occurs.

[0108] As shown in Figure 11, the opening member 53 of the flow channel member 50 has a flange portion 53e surrounding the first opening 51. The flange portion 53e is the part that extends radially outward from the first opening 51.

[0109] As shown in Figures 2 and 10, the first opening 51 of the flow path member 50 is connected to the outlet opening 57e of the intake side flow path 57 by fitting the flange portion 53e into the flow path mating portion 60 provided on the inner wall surfaces of the outer wall members 16a and 16b. With this configuration, the flow path member 50 can be assembled to the drive body housing 15 more easily by fitting the flange portion 53e into the flow path mating portion 60. In addition, the fit of the flange portion 53e into the flow path mating portion 60 improves the fixation of the flow path member 50 to the outlet opening 57e of the intake side flow path 57. Therefore, it is possible to further suppress the disconnection of the flow path member 50 from the drive body housing 15 due to vibrations during operation.

[0110] As shown in Figure 12, while the drive body housing 15 moves in the front-rear direction relative to the drive body 11, the first opening 51 and the second opening 52 of the flow path member 50 are configured to maintain an overlapping state with respect to each other in a direction perpendicular to the front-rear direction. In this embodiment, the first opening 51 and the second opening 52 are configured to maintain an overlapping state with respect to each other in the vertical direction. With this configuration, the flow path length of the flow path member 50 can be kept short, thereby suppressing a decrease in the cooling efficiency of the cooling air due to deformation of the flow path member 50. In addition, since the range of deformation of the flow path member 50 is compactly contained, the deformation of the flow path member 50 when the striking tool 10 is driven can be made even smoother.

[0111] 1-5-3. Placement of the control unit in the intake airflow path: Refer to Figure 10. In the striking tool 10, the control unit 65 is positioned between the intake port 55 and the first opening 51 of the flow path member 50 in the intake-side flow path 57. With this configuration, the cooling air from the intake-side flow path 57 can cool the control unit 65 together with the motor 21 in the motor housing 23. Therefore, the cooling efficiency of the internal components in the striking tool 10 can be further improved.

[0112] As shown in Figures 3 and 10, in the striking tool 10, the control unit 65 is positioned to face the outlet opening 57e. With this configuration, the control unit 65 can receive a wide range of cooling air. Therefore, the cooling efficiency of the control unit 65 by the cooling air can be further increased.

[0113] Furthermore, as shown in Figures 3 and 10, the control unit 65 may be positioned diagonally with respect to the opening direction of the outlet opening 57e such that one substrate surface faces the outlet opening 57e and the intake port 55, which is the upstream side of the intake-side flow path 57. With this configuration, the control unit 65 can be cooled by the cooling air, and the control unit 65 can function as a flow path wall, smoothly guiding the cooling air to the outlet opening 57e. Therefore, the cooling efficiency by the cooling air can be further improved.

[0114] Furthermore, tall electronic components, such as cylindrical capacitors, can be mounted in the area on the upper substrate surface opposite to the outlet opening 57e of the control unit 65, which slopes downward toward the outlet opening 57e. This prevents dead space from forming inside the striking tool 10, allows for efficient use of the internal space, and enables the striking tool 10 to be miniaturized.

[0115] The control unit 65 has fins 66 on the substrate surface facing the outlet opening 57e. The fins 66 are composed of multiple wall portions arranged in parallel along the direction of the cooling airflow on their surface. With this configuration, the fins 66 of the control unit 65 can improve the cooling efficiency of the control unit 65 by the cooling air, while also smoothing the flow of cooling air in the intake side passage 57. Therefore, the cooling efficiency by the cooling air can be further improved.

[0116] As shown in Figures 2 and 3, the control unit 65 can be installed by fitting it in the dividing direction into the substrate holding portion 67 provided on the inner wall surface of the outer wall members 16a and 16b. With this configuration, the control unit 65 can be easily assembled when the pair of outer wall members 16a and 16b are joined in the dividing direction to form the rear end housing 16.

[0117] 1-5-4. Summary of cooling airflow paths: As described above, the configuration of the cooling air passage of the striking tool 10 in this embodiment allows the cooling air to be efficiently delivered to the motor housing 23 by the passage member 50, thereby increasing the cooling efficiency of the motor 21. Furthermore, the flexibility of the passage member 50 and the way in which the passage member 50 is connected suppress the effects of vibrations during operation, thus maintaining a state in which cooling air can be efficiently supplied.

[0118] 1-6. Lighting Section: Refer to Figures 1 and 3. As described above, the striking tool 10 is equipped with an illumination unit 70 having a light-emitting element 71 that irradiates light toward the workpiece. With the striking tool 10, the workpiece can be illuminated by the light emitted by the light-emitting element 71, thus improving the user's visibility during work, even in work environments with low ambient light.

[0119] As shown in Figure 1, the striking tool 10 has an operating switch section 80 for the user to control the power, which is provided on the upper end side in the vertical direction. In this embodiment, the operating switch section 80 is provided on the upper connecting end 18a of the connecting ends 18a and 18b that connect the gripping section 18 and the rear end housing 16.

[0120] The user of the impact tool 10 can switch the power supply state within the impact tool 10 by sliding the operating part of the operating switch unit 80 in the forward and backward directions. The user of the impact tool 10 can switch the drive of the tip tool TT on or off by operating the operating switch unit 80. The light-emitting element 71 of the illumination unit 70 is electrically connected to the operating switch unit 80, and the on / off illumination of the light-emitting element 71 can also be switched by the operating switch unit 80. In this embodiment, when the drive of the tip tool TT is turned on by the operating switch unit 80, the light-emitting element 71 is configured to automatically illuminate in conjunction with the drive of the tip tool TT.

[0121] In the striking tool 10, the light-emitting element 71 of the lighting unit 70 is located on the same side as the operation switch unit 80 in the vertical direction. With this configuration, the light-emitting element 71 and the operation switch 80 are easily visible to the user during operation. Therefore, the visibility of the light-emitting element 71 and the operation switch 80 is improved, further enhancing the work efficiency of operations using the striking tool 10. In addition, the wiring distance between the light-emitting element 71 and the operation switch 80 can be shortened, thereby increasing the power efficiency of the lighting unit 70.

[0122] Refer to Figure 1. As described above, the light-emitting element 71 forms a step on the outside of the striking tool 10 and is installed on the outer wall surface 72 facing the front end in the front-rear direction. With this configuration, the workpiece can be easily illuminated by the light from the light-emitting element 71. Therefore, the workability of operations using the striking tool can be further improved.

[0123] Furthermore, in this embodiment, the light-emitting element 71 is installed on the outer wall surface 72 which constitutes the outermost step in the vertical direction. With this configuration, the light-emitting element 71 can irradiate the workpiece from a position that is vertically separated from the drive shaft 13. Therefore, interference between the irradiation area of ​​the light-emitting element 71 and the drive shaft 13 is suppressed, and the irradiation area of ​​the light-emitting element 71 can be further expanded.

[0124] Refer to Figure 3. In the striking tool 10, the light-emitting element 71 is positioned closer to the tip than the transmission mechanism 25. The light-emitting element 71 is positioned above the striking mechanism 43. With this configuration, the light-emitting element 71 is positioned closer to the workpiece, making it easier to illuminate the workpiece with the light-emitting element 71. Therefore, the work efficiency of operations using the striking tool 10 can be improved.

[0125] In the striking tool 10, the illumination unit 70, including the light-emitting element 71, is housed in a drive body housing 15 that functions as a vibration-damping housing. This configuration suppresses the transmission of vibrations from the drive body 11 to the light-emitting element 71, thereby suppressing fluctuations in the light irradiation area of ​​the light-emitting element 71 and enabling stable illumination of the workpiece. Therefore, the workability of operations using the striking tool 10 can be further improved. In addition, damage and deterioration of the components of the illumination unit 70 due to load from vibrations of the drive body 11 can be suppressed.

[0126] As shown in Figure 3, in this embodiment, the outer wall surface 72 on which the light-emitting element 71 is installed constitutes the tip surface located at the very front of the drive body housing 15. With this configuration, the light-emitting element 71 is installed in the position closest to the workpiece within the drive body housing 15, where the influence of vibrations from the drive body 11 can be suppressed. Therefore, the workpiece can be reliably irradiated with light, and the workpiece can be stably irradiated with reduced vibration influences during operation.

[0127] In the striking tool 10, the light-emitting element 71 is located in the rear-end housing 16, rather than the front-end housing 37. The electrical system, which is electrically connected to the operating switch unit 80 and the motor 21, is housed inside the rear-end housing 16 of the striking tool 10, and the main components of the electrical system of the striking tool 10 are grouped together there. Therefore, by placing the lighting unit 70 in the rear-end housing 16, the electrical wiring of the lighting unit 70 can be shortened, and the power efficiency of the lighting unit 70 can be improved. In addition, since the lighting unit 70 can be assembled together with other electrical components installed inside the rear-end housing 16, the ease of assembling the lighting unit 70 to the striking tool 10 can be improved.

[0128] As described above, the impact tool 10 has a battery mounting section 19 on the rear end housing 16. The battery BT mounted in the battery mounting section 19 corresponds to the power supply unit that supplies power to the motor 21 and the lighting unit 70. Therefore, if the lighting unit 70 is provided on the rear end housing 16, the wiring distance from the battery BT to the lighting unit 70 can be shortened, thereby improving the power efficiency of the lighting unit 70.

[0129] As shown in Figure 3, in the striking tool 10, the control unit 65 is located on the same side in the vertical direction as the operating switch unit 80 and the light-emitting element 71. This configuration allows for a shorter wiring distance between the operating switch unit 80, the light-emitting element 71, and the control unit 65. Therefore, the power efficiency of the striking tool 10 can be further improved.

[0130] Refer to Figure 2. In the striking tool 10, the drive body housing 15 is composed of multiple members, and the illumination unit 70 and the control unit 65 are held in the same member among these multiple members. With this configuration, the illumination unit 70 and the control unit 65 can be held in the same member during the assembly process of the striking tool 10, thus improving the ease of assembly of the striking tool 10. In this embodiment, the multiple members that constitute the drive body housing 15 include a pair of divided outer wall members 16a and 16b that constitute the rear end housing 16. If the rear end housing 16 is composed of a pair of divided outer wall members 16a and 16b, as described above, the assembly of internal components into the rear end housing 16 is facilitated.

[0131] In this embodiment, the same member that holds the lighting unit 70 and the control unit 65 is the first divided outer wall member 16a of a pair of divided outer wall members 16a and 16b. The light-emitting element 71 of the lighting unit 70 is fitted and held in an element-holding portion 82 which is part of the outer wall surface fitting portion 72e provided on the first divided outer wall member 16a. The element-holding portion 82 is also shown in Figure 14, which will be referenced later. The control unit 65 is held in a substrate-holding portion 83 provided on the first divided outer wall member 16a. With this configuration, the second divided outer wall member 16b can be placed over the first divided outer wall member 16a and joined while the first divided outer wall member 16a is holding the light-emitting element 71 and the control unit 65. Therefore, the lighting unit 70 and the control unit 65 can be easily assembled to the rear end housing 16. Thus, the ease of assembly of the striking tool 10 can be further improved.

[0132] Refer to Figures 13 and 14 in addition to Figure 2. Figure 13 shows the vicinity of the installation location of the light-emitting element 71 on the first divided outer wall member 16a, which constitutes the left side of the striking tool 10. Figure 14 shows the vicinity of the installation location of the light-emitting element 71 on the second divided outer wall member 16b, which constitutes the right side of the striking tool 10.

[0133] The light-emitting element 71 is held between the pair of divided outer wall members 16a and 16b by being fitted into the outer wall surface fitting portion 72e, which is formed by a groove formed on the periphery of a through hole provided in the outer wall surface 72, in the direction of division of the pair of divided outer wall members 16a and 16b. Figure 13 shows the state in which the light-emitting element 71 is fitted into the outer wall surface fitting portion 72e. With this configuration, the light-emitting element 71 can be easily assembled when the pair of divided outer wall members 16a and 16b are separated from each other. Therefore, the ease of assembly of the light-emitting element 71 to the rear end housing 16 can be further improved.

[0134] Refer to Figures 13 and 14. The inner wall surfaces of the pair of divided outer wall members 16a and 16b are provided with groove-shaped wiring sections 75 and protruding sections 76 that interlock with each other when the rear end housing 16 is formed. In this embodiment, as shown in Figure 13, the divided outer wall members 16a and 16b that constitute the left side of the striking tool 10 are provided with groove-shaped wiring sections 75, and as shown in Figure 14, the divided outer wall members 16a and 16b that constitute the right side are provided with protruding sections 76.

[0135] As shown in Figure 13, the groove-shaped wiring section 75 is formed by grooves that are recessed in the direction of division of the divided outer wall members 16a and 16b on the inner wall surfaces of the divided outer wall members 16a and 16b, and extend in the front-rear direction from the installation location of the light-emitting element 71. Also, as shown in Figure 14, the protruding section 76 is formed by protrusions that extend in the front-rear direction on the inner wall surfaces of the divided outer wall members 16a and 16b.

[0136] In Figure 13, the electrical wiring 73 connected to the light-emitting element 71 is shown with a dashed line for convenience. As shown in Figure 13, the electrical wiring 73 of the light-emitting element 71 is arranged in the groove-shaped wiring section 75. When the rear end housing 16 is assembled, the protruding section 76 fits into the groove-shaped wiring section 75, so the electrical wiring 73 is arranged between the groove-shaped wiring section 75 and the protruding section 76.

[0137] With this configuration, the protruding portion 76 fits into the grooved wiring portion 75, thereby increasing the rigidity of the area where the electrical wiring 73 connected to the light-emitting element 71 is arranged. Furthermore, since the electrical wiring 73 can be surrounded by the grooved wiring portion 75 and the protruding portion 76, the protection of the electrical wiring 73 can be enhanced. In addition, since the electrical wiring 73 can be pushed into the grooved wiring portion 75 by the protruding portion 76, displacement of the electrical wiring 73 can be suppressed. Moreover, when assembling the light-emitting element 71 to the rear end housing 16, the electrical wiring 73 can be correctly arranged by housing it in the grooved wiring portion 75. Therefore, the ease of assembling the electrical wiring 73 of the lighting unit 70 to the striking tool 10 can be further improved.

[0138] As described above, the impact tool 10 of this embodiment is equipped with a lighting unit 70, which improves the visibility of the workpiece by the user even in work environments with low ambient light. Therefore, the workability of the impact tool 10 can be improved. Furthermore, according to the impact tool 10 of this embodiment, the power efficiency of the impact tool 10 and the ease of assembling the lighting unit 70 to the impact tool 10 are improved by the installation position and wiring configuration of the lighting unit 70.

[0139] 2. Other embodiments: The technology of this disclosure is not limited to the configurations of the embodiments described above or the configurations described as other embodiments in those embodiments. The configurations of the embodiments described above can also be modified, for example, as follows. The configurations of the embodiments described below are positioned as one form for carrying out the technology of this disclosure, similar to the configurations described in the embodiments described above.

[0140] In the above embodiment, the elastic body 31 of the elastic mechanism 30 may be made of an elastically deformable member other than a coil spring. Also, the elastic body 31 may not be provided on the outer circumference of the guide member 34, but may be arranged separately from the guide member 34. The rear end of the elastic mechanism 30 may be made of another engaged member to which the engaging portion 33 can engage, instead of being made of a cylindrical member 35. In the above embodiment, the guide member 34 may be made of a linear member, for example, instead of being made of an axial member. In the above embodiment, the striking tool 10 may be provided with five or more elastic mechanisms 30, or with three or fewer elastic mechanisms 30. [Explanation of symbols]

[0141] 10: Striking tool, 11: Drive body, 12: Tool mounting section, 13: Drive shaft section, 15: Drive body housing section, 16: Rear end housing, 16a: First divided outer wall member (outer wall member), 16b: Second divided outer wall member (outer wall member), 17: Front end housing, 18: Gripping section, 18a: Connecting end, 18F: Front end gripping section, 19: Battery mounting section, 20: Drive mechanism, 21: Motor, 21x: Rotating shaft, 23: Motor housing section, 24: Communication port, 25: Transmission mechanism, 30: Elastic mechanism, 31: Elastic body, 33: Engaging section, 33g: Groove section, 34: Guide member, 35: Cylindrical member, 35e: Flange section, 35s: Main body cylinder section, 41: Reducer, 42: Motion conversion mechanism, 43: Striking mechanism, 43a: Cylinder, 43b: Connecting rod, 4 3c: Piston, 43d: Striker, 43e: Impact bottle, 43f: Air chamber, 44: Dynamic vibration absorber, 47: Base member, 50: Flow channel member, 51: First opening, 52: Second opening, 53: Opening material, 53e: Flange part, 55: Intake port, 56: Exhaust port, 57: Intake side flow channel, 57e: Outlet opening, 57w: Intake side flow channel wall, 58: Exhaust side flow channel, 58w: Exhaust side flow channel wall, 60: Flow channel mating part, 65: Control unit, 66: Fin, 67: Substrate holder part, 70: Lighting part, 71: Light-emitting element, 72: Outer wall surface, 72e: Outer wall surface mating part, 73: Electrical wiring, 75: Groove-shaped wiring part, 76: Protruding part, 80: Operation switch part, 82: Element holder part, 83: Substrate holder part, TT: Tip tool, BT: Battery, DX: Drive shaft

Claims

1. It is a striking tool, A drive body has a tool mounting section at its tip to which a tip tool that drives in the front-rear direction to strike the workpiece is attached, and a drive mechanism that drives the tip tool, including a motor, located at the rear end of the tool mounting section, It is composed of a pair of divided outer wall members that can be divided in a dividing direction perpendicular to the front-rear direction, and has a rear end housing that accommodates at least the rear end of the drive body, and has a gripping portion at the rear end for the user to grasp, and is connected to the drive body in a manner that allows it to move in the front-rear direction, A guide member is fixed to the drive body in the front-rear direction within the drive body housing and connected to the drive body housing in a manner that allows movement of the drive body housing in the front-rear direction, and guides the movement of the drive body housing relative to the drive body housing in the front-rear direction, An elastic mechanism is provided which is disposed inside the rear end housing and has an elastic body that elastically deforms to generate an elastic force in the front-rear direction when the drive body moves in the front-rear direction relative to the drive body housing, and which applies the elastic force to the drive body at one end in the front-rear direction and to the drive body housing at the other end, An engaging portion is provided on the inner wall surface of the divided outer wall member and is capable of engaging with the other end of the elastic mechanism, A striking tool equipped with the necessary components.

2. The striking tool according to claim 1, The guide member is composed of an axial member, The aforementioned elastic body is provided on the outer circumference of the guide member and is composed of a coil spring that expands and contracts in the front-rear direction to generate the elastic force, in this striking tool.

3. A striking tool according to claim 1 or claim 2, The elastic mechanism includes a cylindrical member having a cylindrical hole through which the guide member is inserted, and which moves along the guide member while in contact with the end of the elastic body. The cylindrical member constitutes the other end of the elastic mechanism, The engagement portion is a striking tool that engages with the elastic mechanism in the cylindrical member.

4. The striking tool according to claim 3, A striking tool in which the length in the front-rear direction of the engaged portion that engages with the engaging portion of the cylindrical member is substantially the same as the length in the front-rear direction of the engaging portion.

5. A striking tool according to claim 3 or claim 4, The striking tool has an engagement portion having a substantially semicircular cross-sectional shape that opens in the dividing direction and a groove portion that extends in the front-rear direction, and engages with the cylindrical member by receiving the cylindrical member into the groove portion in the dividing direction.

6. A striking tool according to any one of claims 3 to 5, The cylindrical member is installed in the drive mechanism while receiving an elastic force from the elastic body, and is a striking tool.

7. A striking tool according to any one of claims 1 to 6, The gripping portion has a columnar structure that extends in a vertical direction perpendicular to both the front-rear direction and the left-right direction, at the center of the left-right direction perpendicular to the front-rear direction. The striking tool is provided with multiple elastic mechanisms, which are arranged on both sides in the left-right direction, flanking the gripping portion.

8. The striking tool according to claim 7, The aforementioned elastic mechanism is provided with at least four units. The striking tool comprises an elastic mechanism, of which at least two are arranged in the vertical direction on both sides of the gripping portion in the left-right direction.

9. A striking tool according to any one of claims 1 to 8, The gripping portion has a columnar structure that extends along the front-to-back direction and the up-and-down direction perpendicular to the left-to-right direction perpendicular to the front-to-back direction. An impact tool in which, when viewed in the front-to-back direction, the tip tool, the motor, and the gripping portion are arranged to overlap each other.

10. The striking tool according to claim 9, A striking tool in which the rotating shaft of the motor extends along the vertical direction together with the gripping portion.

11. A striking tool according to any one of claims 1 to 10, The drive unit housing is provided with a battery mounting section for which a battery that supplies power to the motor is installed, in an impact tool.

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