Impact tools

Abstract

To provide improvement relating to wiring of a striking tool equipped with a vibration control structure.SOLUTION: A striking tool is equipped with a first housing, a motor stored in the first housing, a second housing covering at least a part of the first housing, and a controller stored in the second housing. The second housing is coupled to the first housing through at least one elastic member so as to move to the first housing in a first direction parallel with a drive shaft. The second housing has at least one opening for wiring that communicates the inside and outside of the second hosing. At least one electric wire extended from the controller extends outside the second housing through the at least one opening of the second housing.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to an impact tool configured to linearly drive an accessory tool. [Background technology]

[0002] An impact tool performs a machining operation (e.g., chipping) on ​​a workpiece by intermittently striking one end of the tool bit, driving the tool bit linearly along a drive shaft. Therefore, in an impact tool, large vibrations occur, particularly in the direction of extension of the drive shaft, as the motor is driven. Therefore, various impact tools are known that have vibration-damping structures to reduce the transmission of vibrations to the grip. For example, the impact tool disclosed in Patent Document 1 includes a drive unit housing that houses the drive unit, and a head housing that is elastically supported by the drive unit housing and integrated with the handle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-165783 Summary of the Invention [Problem to be solved by the invention]

[0004] An impact tool having the above-described configuration can effectively reduce the transmission of vibration from the drive housing to the handle. However, because an impact tool with such a vibration-damping structure includes at least two members that move relative to one another, careful consideration must be given to the wiring inside the housing.

[0005] In view of the above-mentioned circumstances, one non-limiting object of the present disclosure is to provide an improvement regarding wiring for an impact tool with a vibration-damping structure. [Means for solving the problem]

[0006] According to one non-limiting aspect of the present disclosure, there is provided an impact tool configured to drive a tool bit linearly along a drive shaft by striking the tool bit, the impact tool including a first housing, a motor, a second housing, and a controller.

[0007] The first housing defines a drive shaft of the tool accessory. The motor is accommodated in the first housing. The second housing covers at least a portion of the first housing. The second housing is connected to the first housing via at least one elastic member so as to be movable relative to the first housing in a first direction parallel to the drive shaft. The controller is accommodated in the second housing. The controller is configured to control the driving of the motor. The second housing has at least one opening for wiring that communicates between the inside and outside of the second housing. At least one electric wire extending from the controller extends to the outside of the second housing through the at least one opening.

[0008] According to the impact tool of this aspect, even if vibrations in the first direction occur in the first housing due to the driving of the motor, the second housing can move relative to the first housing in the first direction parallel to the drive shaft while the biasing force of at least one elastic member is applied. This vibration-proof housing structure suppresses transmission of vibrations to the second housing. Therefore, the controller housed in the second housing can be effectively protected from vibrations. Furthermore, at least one electric wire extending from the controller extends outside the second housing through at least one opening. This reduces the possibility of the electric wire coming into contact with the first housing when the first housing vibrates, thereby suppressing deterioration of the electric wire. Furthermore, an impact tool assembler can physically connect at least one electric wire extending from the controller to other electric wires, components, or at least one connecting component (such as a connector, coupler, or terminal) outside the second housing. This improves the efficiency of the wiring work. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a hammer according to an embodiment of the present disclosure. [Figure 2] FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a partially enlarged view of FIG. [Figure 6] FIG. 2 is a top view of the hammer with the top cover removed. [Figure 7] FIG. 2 is a perspective view of the controller case with the controller assembly housed therein. [Figure 8] FIG. 2 is a perspective view of the controller case. [Figure 9] FIG. 10 is another perspective view of the controller case. [Figure 10] FIG. 1 is a perspective view of the hammer with the right handle and battery housing cover removed. [Figure 11] FIG. 1 is a right side view of the hammer with the top cover, right handle, and battery housing cover removed. [Figure 12] FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. [Figure 13] FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. [Figure 14] FIG. 1 is a perspective view of the hammer with the left handle and battery housing cover removed. [Figure 15] FIG. 1 is a left side view of the hammer with the top cover, left handle, and battery housing cover removed. DETAILED DESCRIPTION OF THE INVENTION

[0010] In one non-limiting embodiment of the present disclosure, the second housing may include a second housing body and a case. The second housing body may have at least one opening. The case may be connected and fixed to the second housing body and house the controller. The case may have a partition and at least one guide. The partition may be spaced apart from the first housing and disposed between the controller and the first housing. The at least one guide may be configured to guide at least one electric wire extending from the controller toward the outside of the case and the at least one opening. According to this embodiment, the partition can effectively isolate the controller from vibrations of the first housing. Furthermore, the at least one guide can effectively reduce the possibility that the at least one electric wire extending from the controller will come into contact with the first housing within the second housing.

[0011] In addition to or instead of the above embodiment, the second housing may include a first portion that houses the controller and a second portion connected to the first portion. The at least one opening in the second housing may be at least one recess (notch) formed at the connection end of the first portion with the second portion or at the connection end of the second portion with the first portion. According to this embodiment, at least one electric wire extending from the controller can be guided out of the second housing at a position relatively close to the controller. This effectively reduces the possibility of the electric wire contacting the first housing when the first housing vibrates. Furthermore, an assembler can easily guide at least one electric wire extending from the controller out of the second housing by simply connecting the first portion and the second portion together while the at least one electric wire extends from the controller and passes through the at least one recess.

[0012] In addition to or instead of the above embodiment, the impact tool may further include at least one battery mounting portion configured to removably mount a battery. The at least one battery mounting portion may be disposed outside the second housing. The at least one battery mounting portion may have terminals that are electrically connectable to terminals of the battery in response to the battery being mounted. The at least one electric wire extending from the controller may include at least one terminal wire connected to the terminal.

[0013] According to this embodiment, an assembler can easily connect the terminal wire extending from the opening of the second housing to the terminal of the battery attachment part outside the second housing. Note that the terminal wire may be directly connected to the terminal outside the second housing. Alternatively, the terminal wire and at least one electric wire extending from the terminal may be directly connected outside the second housing. Alternatively, the terminal wire and at least one electric wire extending from the terminal may be connected outside the second housing via at least one connecting part (such as a connector, coupler, or terminal) separate from the electric wire. In the following embodiments, "connection" also encompasses similar aspects unless explicitly limited otherwise.

[0014] In addition to or instead of the above embodiment, the impact tool may further include at least one handle having a grip portion. The at least one handle may be connected and fixed to the second housing outside the second housing. Furthermore, the at least one handle may at least partially cover the at least one electric wire outside the second housing. According to this embodiment, since the at least one handle is integrated with the second housing, transmission of vibration to the at least one handle is suppressed. Furthermore, the at least one handle can protect at least a portion of the electric wire extending outside the second housing through the at least one opening.

[0015] In addition to or instead of the above embodiment, the impact tool may further include a switch for activating the motor housed in at least one handle. The at least one electric wire extending from the controller may include a switch electric wire connected to the switch. According to this embodiment, an assembler can easily connect the switch electric wire extending from the opening in the second housing to the switch outside the second housing.

[0016] In addition to or instead of the above embodiment, the at least one handle may be located between the controller and the at least one battery mounting portion in the first direction, which allows the at least one handle to cover and easily protect at least a portion of the terminal wire.

[0017] Additionally or alternatively, the at least one battery mounting portion may include a wall portion adjacent to the at least one handle and projecting outward from the second housing. The terminals may be supported by the wall portion. Terminal wires may be connected to the terminals through openings formed in the wall portion. This embodiment provides an efficient routing for the terminal wires.

[0018] In addition to or instead of the above embodiment, the at least one handle may include two handles arranged on either side of the second housing in a second direction perpendicular to the drive shaft. The grip portions of the two handles may extend along axes extending in the second direction. This embodiment provides an impact tool suitable for use with a user holding the grip portions with both hands and with the tool bit facing downward.

[0019] In addition to or instead of the above embodiment, the at least one battery mounting portion may include two battery mounting portions disposed adjacent to the two handles on both sides of the second housing in the second direction. The at least one opening may include two openings provided on both sides of the second housing in the second direction. The at least one terminal wire may include two terminal wires extending to the outside of the second housing through the two openings and connected to the terminals of the two battery mounting portions, respectively. According to this embodiment, the weight balance in the second direction can be optimized. Therefore, the user can hold the impact tool in a more stable state and perform impact work.

[0020] In addition to or instead of the above embodiment, the impact tool may further include a switch for activating the motor housed in one of the two handles. The at least one electric wire extending from the controller may include a switch electric wire connected to the switch and a motor electric wire connected to an electric wire extending from the motor outside the second housing and inside the other of the two handles. According to this embodiment, an assembler can easily connect the motor electric wire and the electric wire extending from the motor outside the second housing. Furthermore, the two handles can be effectively used, and the electric wires and the switch can be protected.

[0021] In addition to or instead of the above embodiment, the second housing may have an internal wall. A passage separated from the first housing by the internal wall may be defined within the second housing. Electric wires extending from the motor may pass through the passage and extend to the outside of the second housing. This embodiment reduces the possibility that the portion of the electric wires extending from the motor that is disposed within the second housing will come into contact with the first housing when the first housing vibrates, thereby suppressing deterioration of the electric wires.

[0022] Hereinafter, a description will be given of an electric hammer (also referred to as a breaker hammer or demolition hammer) 1 according to a representative but non-limiting embodiment of the present disclosure with reference to the drawings. The hammer 1 is an example of an impact tool configured to linearly drive a tool tip (e.g., a hammer bit) along a predetermined drive axis A1.

[0023] First, the general configuration of the hammer 1 will be described.

[0024] As shown in FIGS. 1 and 2, the hammer 1 mainly includes a housing 11, a tool holder 15, a pair of handles 4, and a pair of battery housings 5.

[0025] The housing 11 is an elongated housing extending along the drive axis A1. The tool holder 15 is connected to one end of the housing 11 in the longitudinal direction and extends along the drive axis A1. The tool holder 15 is configured to removably hold a tool bit (not shown). The handles 4 each include a grip portion 42 to be held by a user. The handles 4 are connected to the other end of the housing 11 in the longitudinal direction so that the grip portions 42 protrude in opposite directions from each other. In this embodiment, the grip portions 42 extend along an axis A2 that is substantially perpendicular to the drive axis A1. With this arrangement, the housing 11 and the two handles 4 form a T-shape when viewed in a direction perpendicular to the drive axis A1 and the axis A2. A trigger 43 is provided on the grip portion 42 of one of the two handles 4.

[0026] Typically, an operator uses the hammer 1 by holding the grip portion 42 with his left and right hands, with the tool bit attached to the tool holder 15 projecting downward. Therefore, for ease of explanation, the extending direction of the drive shaft A1 (which can also be referred to as the longitudinal direction of the housing 11) will be defined as the up-down direction of the hammer 1. In the up-down direction, the side on which the tool holder 15 is disposed will be defined as the lower side of the hammer 1, and the opposite side (the side on which the handle 4 is disposed) will be defined as the upper side of the hammer 1. Furthermore, the extending direction of the axis A2 (grip portion 42) will be defined as the left-right direction of the hammer 1. In the left-right direction, the side on which the grip portion 42 with the trigger 43 is disposed will be defined as the right side of the hammer 1, and the opposite side (the side on which the grip portion 42 without the trigger 43 is disposed) will be defined as the left side of the hammer 1. The direction perpendicular to the up-down direction and the left-right direction will be defined as the front-rear direction of the hammer 1.

[0027] A battery 59 can be attached to the battery housing 5. In this embodiment, two battery housings 5 ​​are provided below and adjacent to the two handles 4, respectively. The hammer 1 operates using the two batteries 59 attached to the battery housings 5 ​​as a power source. Specifically, when the trigger 43 is pressed by the user, the motor 71 (see FIGS. 3 and 4) is driven, and the tool bit is driven linearly.

[0028] The detailed configuration of the hammer 1 will be described below.

[0029] 3 and 4, the housing 11 includes a first housing 2 and a second housing 3. The first housing 2 and the second housing 3 are connected to be relatively movable in the direction in which the drive shaft A1 extends, that is, in the up-and-down direction.

[0030] The first housing 2 and the elements disposed therein will now be described.

[0031] The first housing 2 accommodates the motor 71 and the drive mechanism of the tool bit (the motion conversion mechanism 73 and the impact mechanism 75). For this reason, the first housing 2 may also be referred to as a drive mechanism housing. The first housing 2 includes an upper housing portion 21 and a lower housing portion 26 connected to the lower end of the upper housing portion 21.

[0032] The upper housing portion 21 mainly accommodates a motor 71 and a portion of a motion conversion mechanism 73. The motor 71 is disposed within the upper end portion of the upper housing portion 21. In this embodiment, the motor 71 is a brushless motor. The motion conversion mechanism 73 is disposed below the motor 71. The motion conversion mechanism 73 converts rotational motion into linear motion, and in this embodiment, a well-known piston-crank mechanism is employed. Briefly, the motion conversion mechanism 73 includes a crankshaft 731 operably connected to the output shaft 711 of the motor 71 and having an eccentric pin, and a piston 735 operably connected to the eccentric pin via a connecting rod 733. The motor 71 and the motion conversion mechanism 73 are disposed such that the rotation axes of the output shaft 711 and the crankshaft 731 extend in the front-rear direction, perpendicular to the drive axis A1.

[0033] The lower housing portion 26 is generally cylindrical overall and is also referred to as a barrel portion. In this embodiment, the lower housing portion 26 is a separate member from the upper housing portion 21, is fixed to the lower end of the upper housing portion 21, and extends along the drive axis A1. A tool holder 15 is fixed to the lower end of the lower housing portion 26. A cylinder 261 is housed in the lower housing portion 26. A piston 735 and an impact mechanism 75 are disposed inside the cylinder 261. The piston 735 reciprocates vertically within the cylinder 261 as the motor 71 is driven. The impact mechanism 75 in this embodiment has a well-known configuration including a striker 751 and an impact bolt 753. The impact mechanism 75 operates in response to pressure fluctuations generated in an air chamber 750 by the reciprocating movement of the piston 735, and drives the tool bit linearly along the drive axis A1.

[0034] The second housing 3 and the elements disposed therein will now be described.

[0035] 1 to 5, the second housing 3 is generally a box-shaped body with an open bottom end, and is configured to cover the upper part of the first housing 2 (more specifically, almost the entire upper accommodating portion 21). For this reason, the second housing 3 may also be referred to as an outer housing or outer cover. The second housing 3 of this embodiment includes a main cover 31, a top cover 34, and a controller case 37, which are connected and fixed to one another.

[0036] The main cover 31 is a cylindrical member and is arranged to surround the outer periphery of the upper accommodating section 21. The main cover 31 includes a pair of left and right side wall portions 311, and a front wall portion 313 and a rear wall portion 315 that connect the side wall portions 311. Note that the main cover 31 of this embodiment is formed of two half bodies (a left shell and a right shell) that are connected and fixed to each other in the left-right direction.

[0037] The top cover 34 is generally a box-shaped body with an open bottom end, and includes an upper wall portion 341 and a peripheral wall portion 343 that protrudes downward from the periphery of the upper wall portion 341. The lower end of the peripheral wall portion 343 is fixed to the upper end of the main cover 31 with a plurality of screws. The upper end of the first housing 2 (upper accommodating portion 21) (more specifically, a part of the accommodating portion for the motor 71) protrudes above the upper end of the main cover 31, i.e., into the top cover 34. However, the upper end of the first housing 2 is below the upper wall portion 341 of the top cover 34, and a space is formed between the upper end of the first housing 2 and the top cover 34. A controller case 37 is disposed in this space within the top cover 34 and is connected to the top cover 34.

[0038] As shown in FIG. 5, the controller case 37 is a case that mainly houses (holds) the controller 70. The controller 70 is configured to control the operation of the hammer 1 (such as driving the motor 71). In this embodiment, the controller 70 is a microcomputer including a CPU, ROM, memory, etc., and is mounted on a control board. The microcomputer is supported by a heat dissipation member 705, and together with the heat dissipation member 705, it constitutes an integrated controller assembly 700. However, a control circuit other than a microcomputer may be used for the controller 70. Furthermore, the microcomputer (control circuit) does not need to be integrated with the heat dissipation member 705.

[0039] 5 to 8, recess 371 that opens upward is formed in the center of controller case 37. Recess 371 has a shape that matches controller assembly 700 (a rectangular shape that is long in the left-right direction when viewed from above), and controller assembly 700 is fitted into recess 371.

[0040] The controller case 37 has two elastically deformable (flexible) locking pieces 379. The two locking pieces 379 are provided adjacent to the left and right edges of the recess 371, respectively. The tips of the locking pieces 379 have claws (protrusions) that protrude toward the center of the recess 371. When an assembly worker places the controller assembly 700 in the controller case 37, the locking pieces 379 bend in a direction away from the recess 371, thereby allowing the controller assembly 700 to be fitted into the recess 371. When the locking pieces 379 return to their original positions as the controller assembly 700 is fitted into the recess 371, the claws of the locking pieces 379 engage with the upper surface of the controller assembly 700, preventing the controller assembly 700 from coming out of the recess 371.

[0041] In this way, locking piece 379 snaps into engagement with controller assembly 700, thereby temporarily fastening (provisionally fixing) controller assembly 700 to controller case 37. Note that "temporarily fastening" refers to fixing or holding in a state that allows slight movement or removal by a certain degree of external force.

[0042] The controller case 37 is fixed to the top cover 34 (more specifically, the upper wall portion 341) from below with a plurality of screws, with the controller assembly 700 housed in the recess 371 facing the upper wall portion 341 of the top cover 34. The bottom wall portion 370 of the controller case 37 is spaced upward from the upper end of the first housing 2 (see FIG. 5).

[0043] In this embodiment, because the controller case 37 has a temporary fastening function, the assembler can handle the controller 70 and the controller case 37 as a single unit. For example, even if the controller case 37 is turned upside down with the bottom wall 370 on top and the controller assembly 700 on the bottom, the controller assembly 700 will not fall off the controller case 37. Therefore, the assembler can place the top cover 34 on a workbench with the opening at its bottom facing upward, turn the controller case 37 upside down, and easily fasten it to the top cover 34 from above with screws. This improves the efficiency of the assembly work.

[0044] In this embodiment, the controller case 37 supports a main power switch 77 and a wireless unit 78 in addition to the controller 70 (see FIG. 6). The main power switch 77 is a switch for placing the hammer 1 in an energized state. When the main power switch 77 is turned on, power is supplied from the battery 59 to the controller 70 and the like. The wireless unit 78 is a known device capable of wirelessly transmitting and receiving signals to and from a device (e.g., a dust collector) used together with the hammer 1. The wireless unit 78 is configured to communicate with the device used together with the hammer 1 for association (so-called pairing) when a start button 781 is turned on.

[0045] The main power switch 77 and the wireless unit 78 are fitted into recesses 375, 376 (see FIG. 8) provided in the controller case 37 adjacent to the recess 371. Although detailed illustration is omitted, the main power switch 77 and the wireless unit 78 are electrically connected to the controller 70 by electric wires extending from the underside of each. Furthermore, when the controller case 37 is fixed to the top cover 34, the start buttons 781 of the main power switch 77 and the wireless unit 78 are exposed to the outside through openings formed in the top cover 34 (see FIG. 1). Therefore, a user can manually operate the start buttons 781 of the main power switch 77 and the wireless unit 78 from outside the top cover 34.

[0046] 6 to 9, the controller case 37 has a configuration for guiding various electric wires 38 extending from the controller 70. More specifically, electric wire guides 372 are provided on the left and right sides of the controller case 37. The electric wire guides 372 are wall portions that define passages 373 that communicate with the internal space of the recess 371. The electric wire guides 372 in this embodiment are wall portions with a generally U-shaped cross section, and each passage 373 extends downward from the recess 371 toward the end of the controller case 37 while gently curving. The electric wires 38 extending from the controller 70 are divided into an electric wire group 38L extending to the left and an electric wire group 38R extending to the right, and are guided to the outside of the controller case 37 by the left electric wire guide 372 and the right electric wire guide 372, respectively. These electric wires 38 are connected to terminals 651 (see FIG. 6) of the battery mounting portion 6, etc. The wiring of the hammer 1 will be described in detail later.

[0047] The handle 4 and the elements arranged therein will be described below. For ease of explanation, the two handles 4 will be referred to collectively below, or either of the two will be referred to without distinction, simply as the handle 4. The handle 4 provided with the trigger 43 will be referred to as the right handle 4R, and the handle 4 without the trigger 43 will be referred to as the left handle 4L.

[0048] As shown in FIG. 5, the two handles 4 are disposed substantially symmetrically with respect to a plane P (a plane including the drive shaft A1 and the rotation axis of the output shaft 711 of the motor 71) passing through the center of the hammer 1 in the left-right direction. The two handles 4 have substantially the same configuration except that only the right handle 4R is configured to hold a trigger 43. In this embodiment, the handles 4 are separate members from the second housing 3 and are connected and fixed to the second housing 3. Each handle 4 includes a base portion 41 and a grip portion 42.

[0049] The base portion 41 is attached to the side wall portion 311 of the second housing 3 (more specifically, the main cover 31). The base portion 41 is generally a box-shaped portion that opens to the side, and is configured to cover roughly the upper half of the side wall portion 311. The end of the base portion 41 on the opening side is fixed to the side wall portion 311 with a plurality of screws. This makes the handle 4 integrated with the second housing 3.

[0050] The grip portion 42 is formed in a cylindrical shape with a bottom, and is connected to the base portion 41 so that the internal space of the grip portion 42 and the internal space of the base portion 41 are in communication. In this embodiment, the base portion 41 and the grip portion 42 are formed integrally, but the base portion 41 and the grip portion 42 may be formed as separate members and fixed to each other. An opening for exposing the trigger 43 to the outside is formed only in the upper part of the grip portion 42 of the right handle 4R.

[0051] The trigger 43 is supported by the right handle 4R so as to be rotatable generally in the vertical direction. Normally, a part of the trigger 43 is in an OFF position where it protrudes upward from the opening of the grip portion 42 of the right handle 4R due to the biasing force of a spring. The trigger 43 rotates downward in response to the user pressing the trigger 43 downward while gripping the grip portion 42 of the right handle 4R with their hand.

[0052] A switch 72 for activating the motor 71 is housed within the base portion 41 of the right handle 4R. More specifically, multiple ribs protrude rightward from the outer surface of the right side wall portion 311 of the main cover 31. The switch 72 is fitted into a recess defined by the ribs and is supported by the right side wall portion 311 (see FIG. 10 ). While the trigger 43 is in the OFF position, the switch 72 is maintained in the OFF state. On the other hand, when the user presses the trigger 43 and rotates it to the ON position, a part of the trigger 43 presses the plunger of the switch 72, turning the switch 72 into the ON state. The controller 70 drives the motor 4 while the trigger 43 is in the ON state.

[0053] The configuration of the battery housing 5 will be described below.

[0054] As shown in FIG. 5, the two battery housings 5 ​​are disposed adjacent to and directly below the two handles 4, respectively, and protrude to the left and right from the side wall portions 311 of the second housing 3 (more specifically, the main cover 31). The two battery housings 5 ​​are disposed substantially symmetrically with respect to the plane P and have substantially the same configuration. This arrangement of the battery housings 5 ​​allows the left-right weight balance of the hammer 1 to be optimized when two batteries 59 are attached. Furthermore, when two batteries 59 are attached, the center of gravity of the entire hammer 1 moves downward when the tool bit is facing downward, allowing the user to hold the hammer 1 in a stable position and perform striking work.

[0055] As shown in FIGS. 5, 10, and 11, the battery housing 5 is formed by an upper wall 51, a lower wall 52, a rear wall 53, and a side wall 54. The side wall 54 is a generally rectangular wall corresponding to the shape of the battery 59, and is disposed laterally (left or right) away from the side wall 311 of the main cover 31 and generally parallel to the side wall 311. The upper wall 51, the lower wall 52, and the rear wall 53 each protrude laterally (left or right) from the side wall 311 of the main cover 31 and are connected to the upper edge, lower edge, and rear edge of the side wall 54, respectively. With this configuration, the battery housing 5 defines a storage space for the battery 59 that is open to the front.

[0056] In this embodiment, the upper wall portion 51, the lower wall portion 52, and the rear wall portion 53 have a double-wall structure. That is, the upper wall portion 51, the lower wall portion 52, and the rear wall portion 53 each have an internal space. The internal spaces of the upper wall portion 51, the lower wall portion 52, and the rear wall portion 53 are connected to each other and together form the internal space 50 of the battery housing 5.

[0057] In this embodiment, the battery housing 5 includes a base portion 501 formed integrally with the side wall portion 311 of the main cover 31, and a cover portion 502 that is a separate member from the base portion 501 and fixed to the base portion 501 with a plurality of screws (see FIG. 10 ). The base portion 501 includes approximately half of the upper wall portion 51, the lower wall portion 52, and the rear wall portion 53 in the left-right direction. The cover portion 502 includes approximately the remaining half of the upper wall portion 51, the lower wall portion 52, and the rear wall portion 53, as well as the side wall portion 54.

[0058] The battery housing 5 has a battery attachment section 6. The battery attachment section 6 is configured to removably receive a battery 59. The battery 59 is a well-known rechargeable battery (also called a battery pack) that has a generally rectangular parallelepiped case and a plurality of cells housed within the case. The battery 59 can be selectively attached to various power tools, including the hammer 1.

[0059] The battery mounting portion 6 includes an engagement portion 61 that can be physically engaged with the battery 59 and a terminal portion 65 that can be electrically connected to the terminal of the battery 59 .

[0060] As this is a well-known configuration, detailed illustration is omitted, but the engaging portion 61 includes a pair of rails. The rails are provided below the upper wall portion 51 and adjacent to the upper wall portion 51. The rails are spaced apart in the left-right direction and extend parallel to each other in the front-rear direction. The pair of rails can be slidably engaged with a pair of grooves provided in the upper end of the case of the battery 59.

[0061] The terminal portion 65 includes a plate-shaped base (support) 655 and a plurality of terminals 651 supported by the base 655. The plurality of terminals 651 include at least one pair of electrode terminals. The terminal portion 65 may also be referred to as a terminal assembly or a terminal block. The terminal portion 65 is sandwiched and supported (held) between the two halves of the upper wall portion 51 by connecting the base portion 501 and the cover portion 502 of the battery housing 5. As described above, the upper wall portion 51 has a double-wall structure. Specifically, the upper wall portion 51 includes a first upper wall 511 and a second upper wall 512 disposed below the first wall. The base 655 of the terminal portion 65 is housed in an internal space of the upper wall portion 51 formed between the first upper wall 511 and the second upper wall 512. A portion of the terminal 651 is exposed above the base 655. Another part of the terminal 651 protrudes downward from an opening formed in the second upper wall 512 below the upper wall portion 51 .

[0062] When the user slides the battery 59 backward from the front of the battery housing 5 to a predetermined position with the grooves of the battery 59 engaged with the rails of the engagement portion 61, the terminals of the battery 59 come into contact with and are electrically connected to the terminals 651 of the battery attachment portion 6. When the battery 59 is placed in the predetermined position, the locking member of the battery 59 engages with the recesses provided in the engagement portion 61, locking the battery 59 in the predetermined position. When the battery 59 is attached to the battery attachment portion 6 in this way, the battery housing 5 covers substantially all of the battery 59 except for its front surface. Therefore, the battery housing 5 also functions as a protector that protects the battery 59 from external forces.

[0063] An LED light 79 is also held at the lower end of the battery housing 5. More specifically, the LED light 79 is fitted into and supported in a recess provided in the bottom wall portion 52. The LED light 79 can irradiate light toward a working area (an area where the tip of a tool bit is placed) through an opening provided in the bottom wall portion 52. The controller 70 controls the driving of the LED light 79.

[0064] The connection structure between the first housing 2 and the second housing 3 will be described below.

[0065] As described above, in this embodiment, the first housing 2 and the second housing 3 are connected to each other so as to be movable relative to each other in the vertical direction. As described above, the two handles 4 and the two battery housings 5 ​​are integrated into the second housing 3. Therefore, the second housing 3, the handles 4, and the battery housings 5 ​​as a whole can move relative to the first housing 2 in the vertical direction.

[0066] More specifically, as shown in Fig. 5, a pair of first elastic members 111 and a pair of second elastic members 112 (only one is shown in Fig. 5) are interposed between the first housing 2 and the second housing 3 in the up-down direction. In this embodiment, a compression coil spring is used for each of the first elastic member 111 and the second elastic member 112. The first housing 2 and the second housing 3 can move relative to each other in the up-down direction (directions moving toward and away from each other) when the biasing forces of the first elastic member 111 and the second elastic member 112 are applied.

[0067] The first elastic member 111 is interposed between the first housing 2 and the second housing 3 below the grip portion 42 (axis A2). In this embodiment, the two first elastic members 111 are arranged substantially symmetrically with respect to the drive axis A1 (specifically, symmetrically with respect to the plane P). More specifically, a spring receiving portion 212 is provided on each of the left and right side portions of the upper accommodating portion 21 of the first housing 2. A spring receiving portion 312 is provided on each of the left and right side wall portions 311 of the main cover 31 of the second housing 3. The spring receiving portion 312 of the second housing 3 is arranged above and opposite the spring receiving portion 212 of the first housing 2. The first elastic member 111 is arranged to extend in the up-down direction between the spring receiving portion 212 and the spring receiving portion 312.

[0068] The second elastic member 112 is interposed between the first housing 2 and the second housing 3, above the grip portion 42 (axis A2). In this embodiment, the two second elastic members 112 are disposed substantially symmetrically with respect to the drive axis A1. More specifically, two spring bearing portions 213 (only one of which is shown in FIG. 5) are provided on the upper surface of the upper accommodating portion 21 of the first housing 2. Two spring bearing portions 374 (see FIG. 9) are provided on the lower surface of the controller case 37 fixed to the top cover 34 of the second housing 3. The spring bearing portion 374 of the controller case 37 is disposed above the spring bearing portion 213 of the first housing 2 so as to face the same. The second elastic member 112 is disposed to extend in the vertical direction between the spring bearing portion 213 and the spring bearing portion 374.

[0069] In connecting the first housing 2 and the second housing 3, first, the main cover 31 is connected to the first housing 2 via the first elastic member 111. Then, the top cover 34 is connected to the first housing 2 via the second elastic member 112, and the top cover 34 is fixed to the main cover 31 with screws.

[0070] Furthermore, the housing 11 is provided with a guide structure for guiding the relative movement of the first housing 2 and the second housing 3 in the vertical direction.

[0071] As shown in FIGS. 5 and 12 , two first guide portions 114 are provided near the grip portion 42 (axis A2) (at approximately the same position as the grip portion 42) in the up-down direction. In this embodiment, the two first guide portions 114 are disposed substantially symmetrically with respect to the plane P. In this embodiment, each first guide portion 114 includes a guide tube 115 and a guide groove 116. The guide tube 115 is a cylindrical metal member. The two guide tubes 115 are fixed to the left and right side portions of the upper accommodating portion 21 of the first housing 2, respectively, and extend in the up-down direction perpendicular to the axis A2. The guide groove 116 is a groove with a semicircular cross section defined by a curved surface. The curved surface of the guide groove 116 is aligned with the outer peripheral surface of the guide tube 115. The two guide grooves 116 are formed on the inner sides of the left and right side wall portions 311 of the main cover 31 of the second housing 3, respectively. The guide tubes 115 are each partially disposed within the guide groove 116 and are slidable up and down along the guide groove 116 .

[0072] Furthermore, as shown in FIGS. 5 and 13 , two second guide portions 117 are provided lower than the first guide portion 114 in the up-down direction. More specifically, the second guide portions 117 are provided near the battery housing 5 (at roughly the same position as the battery housing 5) in the up-down direction. In this embodiment, the two second guide portions 117 are disposed substantially symmetrically with respect to the plane P. In this embodiment, each second guide portion 117 includes a guide protrusion 118 and two guide ribs 119. The guide protrusion 118 is a protrusion with a rectangular cross section. The two guide protrusions 118 are formed on the left and right side portions of the upper accommodating portion 21 of the first housing 2, respectively, and extend in the up-down direction. The two guide ribs 119 protrude from the inside of the left and right side wall portions 311 of the main cover 31 of the second housing 3, respectively, on the front and rear sides of the guide protrusions 118. The guide protrusions 118 are each partially disposed between the guide ribs 119 and are slidable in the up and down direction along the guide ribs 119 .

[0073] With the above-described configuration, the first housing 2 and the second housing 3 are initially biased by the first elastic member 111 and the second elastic member 112 in directions away from each other in the vertical direction (i.e., downward and upward), and are disposed in their initial positions (the positions shown in FIG. 5 ). Meanwhile, during a striking operation, vibrations occur in the first housing 2 in the direction in which the drive shaft A1 extends (i.e., the vertical direction). In response to these vibrations, the first housing 2 and the second housing 3 move relative to each other while receiving the biasing forces of the first elastic member 111 and the second elastic member 112. During this movement, the first guide portion 114 and the second guide portion 117 stably guide the relative vertical movement between the first housing 2 and the second housing 3. This vibration-proof structure can suppress the transmission of vibrations from the first housing 2 to the second housing 3 and, ultimately, to the grip portion 42 held by the user. Furthermore, the controller 70 housed in the second housing 3 can be effectively protected from vibrations.

[0074] The wiring in the hammer 1, more specifically, the arrangement and connection (wiring work) of various electric wires will be described below.

[0075] As described above, the left and right wire guides 372 guide the wire groups 38L, 38R extending from the controller 70 to the outside of the controller case 37. More specifically, as shown in FIG. 7 , the left wire guide 372 guides the wire group 38L toward the lower left. The right wire guide 372 guides the wire group 38R toward the lower right. As shown in FIG. 6 , the tip of each wire guide 372 is located approximately flush with the outer surface of the first housing 2 in the left-right direction, or slightly closer to the second housing 3 than the outer surface of the first housing 2 (between the outer surface of the first housing 2 and the inner surface of the second housing 3). Thus, the wire guides 372 guide the wire groups 38L, 38R toward the outside of the first housing 2 in the left-right direction. The wire groups 38L, 38R each exit from the corresponding wire guide 372, extend downward within the second housing 3 (top cover 34), and extend to the outside of the second housing 3 through openings 30L, 30R provided in the second housing 3, respectively.

[0076] The openings 30L, 30R are openings that connect the internal space of the second housing 3 with the external space, and are provided to guide the electric wires 38 extending from the controller case 37 arranged inside the second housing 3 to the outside of the second housing 3. In this embodiment, the openings 30L, 30R are recesses (cutouts) formed in the upper ends of the left and right side wall portions 311 of the main cover 31, respectively. The openings 30L, 30R are provided below the electric wire guides 372 and at approximately the same positions as the electric wire guides 372 in the front-to-rear direction. Therefore, the electric wire groups 38L, 38R are guided by the electric wire guides 372 toward the openings 30L, 30R, respectively, and reach the openings 30L, 30R via the shortest route.

[0077] As shown in FIGS. 6, 14, and 15, the left-side electric wire group 38L exits the second housing 3 through the opening 30L and extends outside the left side wall portion 311 and inside the handle 4. The electric wire group 38L includes, among the electric wires 38, a terminal electric wire 381 connected to the terminal 651 of the left battery mounting portion 6, an LED electric wire 382 connected to the LED light 79, and a motor electric wire 383 connected to the electric wire 715 extending from the motor 71.

[0078] One end of the terminal wire 381 is directly (physically) connected to the terminal 651 of the terminal portion 65. As described above, the terminal portion 65 is supported by the upper wall portion 51 of the battery housing 5 with the base portion 655 disposed within the upper wall portion 51 of the battery housing 5. An opening 513 is formed in the first upper wall 511 of the upper wall portion 341 in a region directly above a portion of the terminal portion 65. The terminal wire 381 passes through this opening 513 and is connected to the terminal 651 (the portion exposed above the base 655) within the upper wall portion 51.

[0079] One end of the LED wire 382 is connected to the LED light 79 fixed to the bottom wall 52 of the battery housing 5. More specifically, the LED wire 382 enters the internal space 50 of the battery housing 5 from the opening 513 in the top wall 341 of the battery housing 5, extends to approximately the center of the bottom wall 52, and is directly connected to the LED light 79.

[0080] In this way, the opening 513 forms an efficient path for the terminal wire 381 and the LED wire 382 to run from the internal space of the handle 4 to the internal space 50 of the battery housing 5. In addition, the internal space 50 of the battery housing 5 is effectively used as a passage for the LED wire 382.

[0081] One end of the motor electric wire 383 is connected to a connector 384. The motor electric wire 383 is connected to an electric wire 715 extending from the motor 71 via the connector 384.

[0082] An electric wire 715 extending from the motor 71 extends rearward from the upper rear end portion (rear side of the motor 71) of the upper accommodating portion 21 of the first housing 2 to the outside of the first housing 2. Furthermore, the electric wire 715 extends inside the second housing 3 (main cover 31), passes through an opening 301 provided in the second housing 3, and extends to the outside of the second housing 3.

[0083] The opening 301 is an opening that connects the internal space of the second housing 3 with the external space, and is provided to guide the electric wires 715 extending from the motor 71 to the outside of the second housing 3. In this embodiment, the opening 301 is a recess (notch) formed in the upper end of the rear end portion of the left side wall portion 311 of the main cover 31. The opening 301 is located rearward of the opening 30L through which the electric wire group 38L passes.

[0084] An inner wall (partition) 317 is provided inside the main cover 31. More specifically, the inner wall 317 is provided to correspond to approximately the left half of the rear wall 315 of the main cover 31 of the second housing 3 and the rear end of the left side wall 311. Gaps (spaces) are provided between the inner wall 317 and the outer surface of the upper accommodating portion 21, and between the inner wall 317 and the inner surfaces of the rear wall 315 and the side wall 311. The electric wires 715 extend from the opening 301 to the outside of the second housing 3 through a passage 318 defined between the inner wall 317 and the inner surfaces of the rear wall 315 and the side wall 311 of the main cover 31. The inner wall 317 protects the electric wires 715 by preventing them from coming into contact with the first housing 2.

[0085] One end of the electric wire 715 is connected to a connector 716. The connector 384 of the motor electric wire 383 and the connector 716 of the electric wire 715 from the motor 71 are connected to each other, thereby electrically connecting the motor electric wire 383 and the electric wire 715 from the motor 71. A plurality of ribs protrude leftward from the outer surface of the left side wall 311 of the main cover 31. The connected connectors 384, 716 are fitted into recesses defined by the ribs and supported by the left side wall 311.

[0086] As shown in FIGS. 6, 10 and 11, the right-side electric wire group 38R exits the second housing 3 through the opening 30R and extends to the outside of the right side wall portion 311 and inside the handle 4. The electric wire group 38R includes, among the electric wires 38, a terminal electric wire 381 connected to the terminal 651 of the right-side battery mounting portion 6, an LED electric wire 382 connected to the LED light 79, and a switch electric wire 385 connected to the switch 72 for starting the motor 71.

[0087] The wiring of the terminal wires 381 and the LED wires 382 of the right-side wire group 38R is substantially the same as the wiring of the terminal wires 381 and the LED wires 382 of the left-side wire group 38L. Specifically, the terminal wires 381 extend downward outside the right side wall 311, pass through an opening 513 formed in the top wall 51 of the battery housing 5, and are directly connected to the terminals 651 within the top wall 51. The LED wires 382 extend downward outside the right side wall 311, enter the internal space 50 of the battery housing 5 from the opening 513, pass through the internal space 50, and are directly connected to the LED lights 79.

[0088] The switch wire 385 extends downward outside the right side wall portion 311. One end of the switch wire 385 is directly connected to the switch 72 held by the rib of the side wall portion 311 as described above.

[0089] As described above, the various electric wires 38 extending from the controller 70 extend to the outside of the second housing 3 through the openings 30L, 30R. This effectively reduces the possibility that the electric wires 38 will come into contact with the first housing 2 when the first housing vibrates, thereby suppressing deterioration of the electric wires 38. Therefore, in the hammer 1 of this embodiment, no holding member (fastener) is used to fix the electric wires 38 to the inner surface of the second housing 3 so that the electric wires 38 do not come into contact with the first housing 2.

[0090] In particular, in this embodiment, openings 30L, 30R are provided at the upper ends of left and right side wall portions 311 of main cover 31. The upper ends of side wall portions 311 are located at positions corresponding to the upper part of first housing 2 in the up-down direction. This makes it possible to relatively shorten the distance that electric wires 38 extending from controller 70 pass along the sides of first housing 2, and to lead electric wires 38 to the outside of second housing 3 at a position relatively close to controller 70.

[0091] Furthermore, in this embodiment, the controller case 37 having the above-described configuration contributes to protecting the electric wires 38 within the second housing 3 and realizing an optimal route toward the openings 30L, 30R. Specifically, the bottom wall 370 prevents the electric wires 38 from contacting the first housing 2 in the up-down direction between the electric wires 38 and the first housing 2. Furthermore, the electric wire guides 372 guide the electric wires 38 toward the openings 30L, 30R so as to move away from the first housing 2. By employing such a controller case 37, the possibility of the electric wires 38 coming into contact with the first housing 2 can be more reliably reduced.

[0092] Furthermore, the worker assembling the hammer 1 can more easily connect the electric wire 38 extending from the controller 70 to other electric wires or components outside the second housing 3 than in the past.

[0093] Specifically, in conventional wiring structures, the electric wires 38 extending from the controller 70 housed in the top cover 34 and the electric wires extending from the components arranged inside the main cover 31 (e.g., the motor 71 housed in the first housing 2) are generally connected inside the housing 11 (second housing 3). In this case, the assembly worker must connect these electric wires directly or via separate connecting parts, then store them inside the housing 11 and connect the top cover 34 to the main cover 31. In this case, the assembly worker must store the connected electric wires inside the second housing 3 in a state where it is difficult to visually check them, which reduces work efficiency. In addition, there is a possibility that part of the electric wires may become pinched between the top cover 34 and the main cover 31.

[0094] In contrast, in the present embodiment, as described above, the motor electric wire 383 extending from the controller 70 and the electric wire 715 extending from the motor 71 extend to the outside of the second housing 3 through the opening 30L and the opening 301, respectively. This allows an assembly worker to easily connect the motor electric wire 383 and the electric wire 715 while visually checking them outside the left side wall portion 311. The motor electric wire 383 and the electric wire 715 may be connected directly without using the connectors 384 and 716. Furthermore, the connection process for connecting the motor electric wire 383 and the electric wire 715 may be performed before or after the top cover 34 is fixed to the main cover 31. This improves the efficiency of the wiring work. Furthermore, the possibility that a portion of the motor electric wire 383 or the electric wire 715 will be pinched between the top cover 34 and the main cover 31 can be reduced.

[0095] In particular, in this embodiment, the openings 30L, 30R, and opening 301 are all recesses (notches) formed in the upper end of the side wall portion 311 of the main cover 31. Therefore, an assembly worker can easily lead the electric wires 383, 715 to the outside of the second housing 3 by simply connecting the top cover 34 and the main cover 31 in a state in which the electric wires 383, 715 pass through the corresponding openings 30L, 30R, 301, respectively.

[0096] Similarly to the motor wire 383, the terminal wire 381, the LED wire 382, ​​and the switch wire 385 also extend to the outside of the second housing 3 through the openings 30L and 30R. This allows the assembler to easily connect these wires to the terminal 651, the LED light 79, and the switch 72, which are supported on the outside of the second housing 3. In this embodiment, the terminal wire 381, the LED wire 382, ​​and the switch wire 385 are directly connected to the terminal portion 65, the LED light 79, and the switch 72 without using separate connecting parts. Because the openings 30L and 30R are recesses (cutouts), the assembler can connect the top cover 34 and the main cover 31 with the terminal wire 381, the LED wire 382, ​​and the switch wire 385, to which the terminal portion 65, the LED light 79, and the switch 72 are already connected, passing them through the openings 30L and 30R. This not only improves the efficiency of the wiring work but also reduces the number of parts.

[0097] Furthermore, most of the electric wires arranged outside the second housing 3 are covered by the handle 4. After connecting the electric wires 38 extending from the controller 70 to the corresponding components, the assembly worker can attach the handle 4 to the second housing 3 (main cover 31). Thus, the handle 4 of this embodiment can protect the electric wires while facilitating the wiring work.

[0098] Similarly, the remaining portions of the electric wires arranged outside the second housing 3 are covered by the battery housing 5. The battery housing 5 includes a base portion 501 that is integral with the second housing 3, and a cover portion 502 that is connected to the base portion 501. After connecting the electric wires 38 extending from the controller 70 to the corresponding components and attaching the components to the battery housing 5, an assembly worker can attach the cover portion 502 to the base portion 501. Thus, the battery housing 5 of this embodiment can protect the electric wires while facilitating the wiring work.

[0099] The correspondence between each component (feature) of the above embodiment and each component (feature) of the present disclosure or invention is shown below. However, each component of the embodiment is merely an example and does not limit each component of the present disclosure or invention.

[0100] The hammer 1 is an example of an "impact tool." The first elastic member 111 and the second elastic member 112 are each an example of an "elastic member." The openings 30L, 30R, and 301 are each an example of an "opening for wiring." The main cover 31 and the top cover 34 are an example of a "second housing main body." The controller case 37 is an example of a "case." The bottom wall 370 of the controller case 37 is an example of a "partition wall." The wire guide 372 is an example of a "guide." The top cover 34 and the controller case 37 are an example of a "first part" of the "second housing." The main cover 31 is an example of a "second part." The upper wall 51 and the opening 513 of the battery housing 5 are an example of a "wall of the battery attachment part" and an "opening," respectively.

[0101] It should be noted that the above embodiment is merely an example, and the impact tool according to the present disclosure is not limited to the illustrated hammer 1. For example, the following exemplary modifications can be made. Furthermore, at least one of these modifications can be adopted in combination with the hammer 1 of the embodiment and at least one of the features described in each claim.

[0102] The impact tool according to the present disclosure may be a hammer drill in which the tool bit is not only driven linearly along the drive shaft but also rotated about the drive shaft. Depending on the type of impact tool, the configuration and arrangement of the motor and the drive mechanism of the tool bit (motion conversion mechanism, impact mechanism) may be appropriately changed to any known configuration and arrangement.

[0103] The shapes and components of the first housing 2 and the second housing 3 are not limited to those illustrated in the embodiment and may be modified as appropriate. For example, the number and positions of openings (wiring openings) for guiding the electric wires 38 extending from the controller 70 and the electric wires 715 extending from the motor 71 to the outside of the second housing 3 may be modified depending on the number and positions of the electric wires or components to be connected to each other. For example, the wiring openings may be recesses (notches) formed in the lower end of the top cover 34, or may be through-holes formed in at least one of the main cover 31 and the top cover 34. Furthermore, the configuration of the controller case 37 (for example, the shape, number, and position of the electric wire guides 372) may also be modified in response to changes in the wiring openings.

[0104] The elastic connection structure between the first housing 2 and the second housing 3 (for example, the type, number, and position of elastic members interposed between the first housing 2 and the second housing 3) can be changed as appropriate. The same applies to the guide structure for the relative movement between the first housing 2 and the second housing 3 (for example, the configuration, number, and position of the first guide portion 114 and the second guide portion 117). It is preferable that the number of elastic members and guide portions is two or more.

[0105] The two handles 4 may be attached across the main cover 31 and the top cover 34, or may be attached to the top cover 34 (the portion of the second housing 3 that houses the controller 70). The number of handles 4 may be one.

[0106] The number of battery mounting parts 6 (i.e., the number of batteries 59 that can be mounted on the hammer 1) may be one, or three or more. The position of the battery mounting parts 6 may be changed as appropriate. The hammer 1 may be provided with a power cord instead of the battery mounting parts 6, and may be connectable to an external power source via the power cord.

[0107] Furthermore, in consideration of the spirit of the present invention and the above-described embodiments, the following aspects are constructed. Any one or more of the following aspects may be adopted in combination with the hammer 1 of the embodiment and its modifications, or the inventions described in the claims. [Aspect 1] A tip end of the at least one guide is positioned generally flush with an outer surface of the first housing or between the outer surface and an inner surface of the second housing in a second direction perpendicular to the drive shaft. [Aspect 2] the at least one electrical wire extending from the controller includes a first electrical wire and a second electrical wire; The at least one guide includes two guides configured to guide the first electric wire and the second electric wire toward the two openings in opposite directions in a second direction perpendicular to the drive shaft. [Aspect 3] The at least one opening includes at least one first opening for the at least one electrical wire extending from the controller and a second opening for the electrical wire extending from the motor. [Aspect 4] The impact tool further includes at least one battery housing coupled to the outside of the second housing, the at least one battery housing includes the battery mounting portion and is configured to cover at least a portion of a battery mounted in the battery mounting portion; At least a portion of the at least one battery housing has a double-wall structure, and a portion of the at least one electrical wire extending from the controller is disposed in an interior space defined by the double-wall structure. [Explanation of symbols]

[0108] 1: hammer, 11: housing, 111: first elastic member, 112: second elastic member, 114: first guide portion, 115: guide tube, 116: guide groove, 117: second guide portion, 118: guide protrusion, 119: guide rib, 15: tool holder, 2: first housing, 21: upper accommodating portion, 212: spring receiving portion, 213: spring receiving portion, 26: lower accommodating portion, 261: cylinder, 3: second housing, 30L: opening, 30R: opening, 301: opening, 31: main cover, 3 11: side wall portion, 312: spring receiving portion, 313: front wall portion, 315: rear wall portion, 317: inner wall portion, 318: passage, 34: top cover, 341: upper wall portion, 343: peripheral wall portion, 37: controller case, 370: bottom wall portion, 371: recess, 372: electric wire guide, 373: passage, 374: spring receiving portion, 375: recess, 376: recess, 379: locking piece, 38: electric wire, 38L: electric wire group, 38R: electric wire group, 381: terminal electric wire, 382: LED electric wire, 383: motor wire for switch, 384: connector, 385: wire for switch, 4: handle, 4L: left handle, 4R: right handle, 41: base portion, 42: grip portion, 43: trigger, 5: battery housing, 501: base portion, 502: cover portion, 51: upper wall portion, 511: first upper wall, 512: second upper wall, 513: opening, 52: lower wall portion, 53: rear wall portion, 54: side wall portion, 59: battery, 6: battery mounting portion, 61: engagement portion, 65: terminal portion, 651: terminal, 655: base, 70: Controller, 700: controller assembly, 705: heat dissipation member, 71: motor, 711: output shaft, 715: electric wire, 716: connector, 72: switch, 73: motion conversion mechanism, 731: crankshaft, 733: connecting rod, 735: piston, 75: striking mechanism, 750: air chamber, 751: striker, 753: impact bolt, 77: main power switch, 78: wireless unit, 781: start button, 79: LED light, A1: drive shaft, A2: shaft

Claims

1. An impact tool configured to drive a tool bit linearly along a drive shaft by striking the tool bit, a first housing defining the drive shaft; a motor housed in the first housing; a second housing that covers at least a portion of the first housing, at least partially overlapping the first housing when viewed in a second direction perpendicular to the drive shaft, and that is connected to the first housing via at least one elastic member so as to be movable relative to the first housing in a first direction parallel to the drive shaft; a controller accommodated in the second housing and configured to control the driving of the motor; at least one battery mounting portion disposed outside the second housing and configured to removably mount a battery; at least one handle having a grip portion and fixedly connected to the second housing on the outside of the second housing; the at least one battery mounting section includes a terminal electrically connectable to a terminal of the battery in response to mounting of the battery; the second housing includes a side wall having at least one opening for wiring that communicates between the inside and the outside of the second housing; At least one electrical wire extending from the controller extends to the outside of the second housing through the at least one opening; the at least one electric wire includes at least one terminal wire connected to the terminal; the at least one handle at least partially covers the at least one electrical wire outside the second housing; the at least one handle is located between the controller and the at least one battery mounting portion in the first direction; the at least one battery mounting portion includes a wall portion protruding outward from the second housing adjacent the at least one handle; the terminal is supported by the wall portion, The impact tool is characterized in that the terminal wire is connected to the terminal through an opening formed in the wall portion.

2. An impact tool configured to drive a tool bit linearly along a drive shaft by striking the tool bit, a first housing defining the drive shaft; a motor housed in the first housing; a second housing that covers at least a portion of the first housing, at least partially overlapping the first housing when viewed in a second direction perpendicular to the drive shaft, and that is connected to the first housing via at least one elastic member so as to be movable relative to the first housing in a first direction parallel to the drive shaft; a controller accommodated in the second housing and configured to control the driving of the motor; at least one battery mounting portion disposed outside the second housing and configured to removably mount a battery; at least one handle having a grip portion and fixedly connected to the second housing on the outside of the second housing; the at least one battery mounting section includes a terminal electrically connectable to a terminal of the battery in response to mounting of the battery; the at least one handle at least partially covers the at least one electrical wire outside the second housing; the second housing includes a side wall having at least one opening for wiring that communicates between the inside and the outside of the second housing; At least one electrical wire extending from the controller extends to the outside of the second housing through the at least one opening; the at least one electric wire includes at least one terminal wire connected to the terminal; the at least one handle is located between the controller and the at least one battery mounting portion in the first direction; the at least one handle includes two handles disposed on opposite sides of the second housing in a second direction perpendicular to the drive shaft; The gripping portion of each of the two handles extends along an axis extending in the second direction, the at least one battery mounting portion includes two battery mounting portions disposed adjacent to the two handles on both sides of the second housing in the second direction, the at least one opening includes two openings provided on both sides of the second housing in the second direction; The at least one terminal wire includes two terminal wires extending to the outside of the second housing through the two openings and connected to the terminals of the two battery mounting portions, respectively.

3. An impact tool configured to drive a tool bit linearly along a drive shaft by striking the tool bit, a first housing defining the drive shaft; a motor housed in the first housing; a second housing that covers at least a portion of the first housing, at least partially overlapping the first housing when viewed in a second direction perpendicular to the drive shaft, and that is connected to the first housing via at least one elastic member so as to be movable relative to the first housing in a first direction parallel to the drive shaft; a controller accommodated in the second housing and configured to control the driving of the motor; at least one handle having a grip portion and fixedly connected to the second housing on the outside of the second housing; the second housing includes a side wall having at least one opening for wiring that communicates between the inside and the outside of the second housing; At least one electrical wire extending from the controller extends to the outside of the second housing through the at least one opening; the at least one handle at least partially covers the at least one electrical wire outside the second housing; the at least one handle includes two handles disposed on opposite sides of the second housing in a second direction perpendicular to the drive shaft; The gripping portion of each of the two handles extends along an axis extending in the second direction, The impact tool further includes a switch for starting the motor, the switch being housed in one of the two handles. The at least one electrical wire extending from the controller includes: a switch wire connected to the switch; An impact tool comprising: a motor electric wire connected to an electric wire extending from the motor outside the second housing and inside the other of the two handles.

4. The impact tool according to any one of claims 1 to 3, The second housing includes: a second housing body having the at least one opening; a case connected and fixed to the second housing body and accommodating the controller; The case is a partition wall portion disposed between the controller and the first housing and spaced apart from the first housing; and at least one guide configured to guide the at least one electric wire extending from the controller toward the outside of the case and toward the at least one opening.

5. The impact tool according to any one of claims 1 to 4, the second housing includes a first portion that houses the controller and a second portion that is connected to the first portion; The at least one opening is at least one recess formed in a connection end of the first part with the second part, or in a connection end of the second part with the first part.

6. An impact tool according to any one of claim 3, claim 4 which depends on claim 3, and claim 5 which depends on claim 3, and at least one battery mounting portion disposed outside the second housing and configured to removably mount a battery thereto; the at least one battery mounting section includes a terminal electrically connectable to a terminal of the battery in response to mounting of the battery; The impact tool, wherein the at least one electric wire includes at least one terminal electric wire connected to the terminal.

7. The impact tool according to any one of claims 1 to 6, a switch housed in the at least one handle for activating the motor; The impact tool, wherein the at least one electric wire includes a switch electric wire connected to the switch.

8. An impact tool according to any one of claim 1, claim 4 which depends on claim 1, claim 5 which depends on claim 1, and claim 7 which depends on claim 1, the at least one handle includes two handles disposed on opposite sides of the second housing in a second direction perpendicular to the drive shaft; An impact tool, wherein the gripping portions of the two handles each extend along an axis extending in the second direction.

9. An impact tool according to any one of claim 3, claim 4 which depends on claim 3, claim 5 which depends on claim 3, claim 6, and claim 7 which depends on claim 3, the second housing has an interior wall; a passageway defined within the second housing and separated from the first housing by the interior wall; The impact tool, wherein the electric wire extending from the motor passes through the passage and extends to the outside of the second housing.

Images