Impact Tools

Abstract

To protect a light.SOLUTION: An impact tool includes: a motor; a striking mechanism which is driven by the motor; an anvil which is attached with a tip tool and struck in a rotation direction by the striking mechanism; a hammer case 4 which houses the striking mechanism; a light substrate 60 disposed in at least a part of a periphery of the hammer case; a plurality of lights 61 disposed in at least a part of a front surface of the light substrate; and a light cover 62 which is at least partially disposed close to the light substrate and has passage parts 65 through each of which illumination light emitted from a light emission surface of the light passes.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The technology disclosed herein relates to impact tools. [Background technology]

[0002] 2. Description of the Related Art In the technical field related to impact tools, an impact driver equipped with a light, such as that disclosed in Patent Document 1, is known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5900141 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to prevent damage to the light, it is effective to protect the light.

[0005] The present disclosure aims to protect the light. [Means for solving the problem]

[0006] This specification discloses an impact tool. The impact tool may include a motor, an impact mechanism driven by the motor, an anvil to which a tool tip is attached and which is struck in a rotational direction by the impact mechanism, and a hammer case that houses the impact mechanism. The impact tool may include a light board arranged on at least a portion of the periphery of the hammer case. The impact tool may include a plurality of lights arranged on at least a portion of the front surface of the light board. The impact tool may include a light cover, at least a portion of which is arranged forward of the light board and has a passage portion through which illumination light emitted from the light emission surface of the light passes.

[0007] The impact tool may also include a motor, a hammer rotated by the motor, an anvil at least a portion of which is disposed forward of the hammer and struck in the rotational direction by the hammer, a bearing rotatably supporting the anvil, and a hammer case having a hammer housing portion for housing the hammer and a bearing support portion for supporting the bearing. The impact tool may also include a plurality of lights for illuminating the anvil and the periphery of the anvil, a light board on which the plurality of lights are mounted and which is disposed radially outward of the bearing support portion, a hammer case cover covering at least a portion of the outer surface of the hammer housing portion, and a light cover disposed forward of the hammer case cover and at least a portion of which is disposed forward of the light board and the light. Effect of the Invention

[0008] According to the above configuration, the light is protected. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an impact tool according to an embodiment. [Diagram 2] FIG. 2 is a side view showing an upper portion of the impact tool according to the embodiment. [Diagram 3] FIG. 3 is a plan view showing an upper portion of the impact tool according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing an upper portion of the impact tool according to the embodiment. [Diagram 5] FIG. 5 is a perspective view showing an upper portion of the impact tool according to the embodiment. [Figure 6] FIG. 6 is an exploded perspective view showing an upper portion of the impact tool according to the embodiment. [Figure 7] FIG. 7 is a cross-sectional view taken along line AA in FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line BB in FIG. [Figure 9] FIG. 9 is a front view showing the relationship between the light board and the light and the hammer case according to the embodiment. [Figure 10]FIG. 10 is a front perspective view showing the light board, the light, and the light cover according to the embodiment. [Figure 11] FIG. 11 is a perspective view showing the light board, the light, and the light cover according to the embodiment, as seen from behind. [Figure 12] FIG. 12 is an exploded perspective view showing the light board, the light, and the light cover according to the embodiment, as viewed from the front. [Figure 13] FIG. 13 is an exploded perspective view showing the light board, the light, and the light cover according to the embodiment, as seen from the rear. [Figure 14] FIG. 14 is an exploded perspective view showing the impact tool according to the embodiment. [Figure 15] FIG. 15 is a perspective view showing a light unit according to a modified example. [Figure 16] FIG. 16 is a diagram showing a light board according to a modified example. [Figure 17] FIG. 17 is a diagram showing a light board according to a modified example. [Figure 18] FIG. 18 is a diagram showing a light board according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In one or more embodiments, the impact tool may include a motor, a striking mechanism driven by the motor, an anvil to which a tool tip is attached and which is struck in a rotational direction by the striking mechanism, and a hammer case that houses the striking mechanism. The impact tool may include a light board disposed on at least a portion of the periphery of the hammer case. The impact tool may include a plurality of lights disposed on at least a portion of the front surface of the light board. The impact tool may include a light cover, at least a portion of which is disposed forward of the light board and has a passage portion through which illumination light emitted from the light emission surface of the light passes.

[0011] In the above configuration, the light cover protects the light, thereby preventing damage to the light.

[0012] In one or more embodiments, the light cover may contact the front and sides of the light substrate.

[0013] In the above configuration, the front and side surfaces of the light board are protected by the light cover.

[0014] In one or more embodiments, the light cover may have a light transmitting portion facing the light exit surface. The passing portion may include the light transmitting portion.

[0015] In the above-described configuration, the light is protected by the light transmitting portion. The illumination light emitted from the light exit surface of the light is transmitted through the light transmitting portion and is irradiated forward of the impact tool.

[0016] In one or more embodiments, the light-transmitting portion may diffuse the illumination light emitted from the light-exiting surface.

[0017] In the above configuration, the illumination light emitted from the light exit surface of the light is diffused by the light transmitting portion, so that the illumination light is irradiated over a wide area in front of the impact tool.

[0018] In one or more embodiments, the light cover may have a light blocking portion facing the front surface of the light substrate.

[0019] In the above-mentioned configuration, the light board is difficult to see from outside the light cover by the light blocking portion, so that the aesthetics of the impact tool are improved. Also, irradiation of external light onto the light board is suppressed.

[0020] In one or more embodiments, the light cover may have a substrate groove. The light substrate may be disposed in the substrate groove such that the light exit surface faces forward.

[0021] In the above configuration, the board groove ensures proper alignment between the light cover and the light board.

[0022] In one or more embodiments, the impact tool may include an adhesive resin portion that fixes the light board and the light cover. At least a portion of the adhesive resin portion may cover a rear surface and a side surface of the light board.

[0023] In the above configuration, the light board and the light cover are fixed by the adhesive resin part. The rear and side surfaces of the light board are protected by the adhesive resin part. The light board and the light are protected by the adhesive resin part. The light board and the light are protected from dust and water by the adhesive resin part.

[0024] In one or more embodiments, the hammer case may have a first cylindrical portion disposed around the striking mechanism, and a second cylindrical portion disposed forward of the first cylindrical portion and having an outer diameter smaller than an outer diameter of the first cylindrical portion. The light cover may be disposed around the second cylindrical portion.

[0025] In the above configuration, the light cover is disposed around the small-diameter second cylindrical portion, so that the impact tool is prevented from becoming large in size. In particular, the first cylindrical portion is prevented from becoming large in size (large in diameter). Since the first cylindrical portion is prevented from becoming large in size (large in diameter), the operability of the impact tool is improved.

[0026] In one or more embodiments, the second cylindrical portion may have a corner protruding radially outward. The light cover may have a recess in which the corner is disposed.

[0027] In the above configuration, the light cover and the second cylindrical portion are properly aligned, and the relative rotation between the light cover and the second cylindrical portion is suppressed.

[0028] In one or more embodiments, the impact tool may include a fastener supported on the second barrel and in contact with at least a portion of the front surface of the light cover.

[0029] In the above configuration, the fixing member prevents the light cover from slipping out forward from the second cylindrical portion, and also prevents relative movement between the light cover and the second cylindrical portion in the front-rear direction.

[0030] In one or more embodiments, the fixing member may include at least one of a ring spring, a bumper, a metal sleeve, and a circlip disposed in a support groove provided in the second cylindrical portion.

[0031] In the above configuration, the ring spring or the like prevents the light cover from slipping forward from the second cylindrical portion. In addition, since the ring spring or the like is detachable from the second cylindrical portion, the light cover can be removed from the second cylindrical portion or replaced smoothly. This improves the ease of maintenance of the light board and the light.

[0032] In one or more embodiments, the impact tool may include a bearing that supports the anvil. The second barrel portion may be disposed about the bearing.

[0033] In the above configuration, the light cover is disposed around the second cylindrical portion that supports the bearing.

[0034] In one or more embodiments, the impact tool may include a hammer case cover covering at least a portion of an outer surface of the first tubular portion. At least a portion of the light cover may contact the hammer case cover.

[0035] In the above configuration, the rear part of the light cover does not contact the hammer case but contacts the hammer case cover, so that the transmission of vibration and heat from the hammer case to the light cover is suppressed. In addition, the first cylindrical part is protected by the hammer case cover. In addition, the hammer case cover suppresses contact between the hammer case and surrounding objects.

[0036] In one or more embodiments, the front end of the hammer case cover may be located radially inward from the rear end of the light cover.

[0037] In the above configuration, an increase in size (larger diameter) of the periphery of the light cover is suppressed.

[0038] In one or more embodiments, the impact tool may include a housing that houses the motor and at least a portion of the first barrel portion. A hammer case cover may be secured to the housing.

[0039] In the above configuration, the hammer case and the hammer case cover are each supported by the housing.

[0040] In one or more embodiments, the hammer case cover may have a hook portion that hooks onto the housing.

[0041] The above-described configuration improves the ease of fixing the hammer case cover to the housing.

[0042] In one or more embodiments, the housing may include a left housing and a right housing, and at least a portion of the hammer case cover may be sandwiched between the left housing and the right housing.

[0043] The above-described configuration improves the ease of fixing the hammer case cover to the housing.

[0044] In one or more embodiments, the impact tool may include a buffer member disposed between the light cover and the hammer case.

[0045] In the above configuration, the vibration and heat of the hammer case are suppressed from being transmitted to the light cover.

[0046] In one or more embodiments, the lights may be multiplexed around the axis of rotation of the anvil.

[0047] In the above configuration, the anvil and the periphery of the anvil are properly illuminated by the multiple lights, so that deterioration of operability when using the impact tool is suppressed even in a dark place.

[0048] In one or more embodiments, the impact tool may include a motor, a hammer rotated by the motor, an anvil at least a portion of which is disposed forward of the hammer and struck in a rotational direction by the hammer, a bearing rotatably supporting the anvil, and a hammer case having a hammer housing portion for housing the hammer and a bearing support portion for supporting the bearing. The impact tool may include a plurality of lights for illuminating the anvil and the periphery of the anvil, a light board on which the plurality of lights are mounted and which is disposed radially outward of the bearing support portion, a hammer case cover covering at least a portion of an outer surface of the hammer housing portion, and a light cover disposed forward of the hammer case cover and at least a portion of which is disposed forward of the light board and the light.

[0049] In the above configuration, the light cover protects the light, thereby preventing damage to the light.

[0050] [Embodiment] The embodiment will be described with reference to the drawings. In the embodiment, the positional relationship of each part will be described using the terms left, right, front, rear, top, and bottom. These terms indicate relative positions or directions based on the center of the impact tool 1. The impact tool 1 has a motor 6 as a power source.

[0051] In the embodiment, the direction parallel to the rotation axis AX of the motor 6 is referred to as the axial direction, the direction circumferential around the rotation axis AX is referred to as the circumferential direction or rotation direction, and the radial direction of the rotation axis AX is referred to as the radial direction.

[0052] The rotation axis AX extends in the front-rear direction. One axial side is the front, and the other axial side is the rear. In addition, in the radial direction, a position closer to or approaching the rotation axis AX is appropriately referred to as the radially inner side, and a position farther from or away from the rotation axis AX is appropriately referred to as the radially outer side.

[0053] <Impact tools> Fig. 1 is a perspective view showing an impact tool 1 according to an embodiment. Fig. 2 is a side view showing an upper part of the impact tool 1 according to an embodiment. Fig. 3 is a plan view showing an upper part of the impact tool 1 according to an embodiment. Fig. 4 is a cross-sectional view showing an upper part of the impact tool 1 according to an embodiment.

[0054] In the embodiment, the impact tool 1 is an impact driver, which is a type of screw tightening tool. The impact tool 1 includes a housing 2, a rear cover 3, a hammer case 4, a hammer case cover 5, a motor 6, a reduction mechanism 7, a spindle 8, a striking mechanism 9, an anvil 10, a bit sleeve 11, a fan 12, a battery mounting section 13, a trigger switch 14, a forward / reverse rotation switching lever 15, an operation panel 16, a hand mode switching button 17, and a light unit 18.

[0055] The housing 2 is made of synthetic resin. In this embodiment, the housing 2 is made of nylon. The housing 2 includes a left housing 2L and a right housing 2R disposed to the right of the left housing 2L. The left housing 2L and the right housing 2R are fixed together by a plurality of screws 2S. The housing 2 is composed of a pair of half housings.

[0056] The housing 2 has a motor accommodating portion 21, a grip portion 22, and a battery connecting portion 23.

[0057] The motor accommodating portion 21 is cylindrical and accommodates the motor 6 therein.

[0058] The grip portion 22 protrudes downward from the motor housing portion 21. The trigger switch 14 is provided on an upper portion of the grip portion 22. The grip portion 22 is held by an operator.

[0059] The battery connect portion 23 is connected to a lower end portion of the grip portion 22. The outer dimensions of the battery connect portion 23 are larger than the outer dimensions of the grip portion 22 in both the front-rear direction and the left-right direction.

[0060] The rear cover 3 is made of synthetic resin. The rear cover 3 is disposed rearward of the motor accommodating portion 21. The rear cover 3 accommodates at least a portion of the fan 12. The fan 12 is disposed on the inner peripheral side of the rear cover 3. The rear cover 3 is disposed so as to cover an opening at the rear end portion of the motor accommodating portion 21.

[0061] The motor accommodating portion 21 has an air intake port 19. The rear cover 3 has an air exhaust port 20. Air in the external space of the housing 2 flows into the internal space of the housing 2 through the air intake port 19. Air in the internal space of the housing 2 flows out to the external space of the housing 2 through the air exhaust port 20.

[0062] The hammer case 4 is made of metal. In the embodiment, the hammer case 4 is made of aluminum. The hammer case 4 is cylindrical. The hammer case 4 is connected to the front part of the motor accommodating section 21. The bearing box 24 is fixed to the rear part of the hammer case 4. A screw thread is formed on the outer periphery of the bearing box 24. A screw groove is formed on the inner periphery of the hammer case 4. The screw thread of the bearing box 24 and the screw groove of the hammer case 4 are coupled to each other, thereby fixing the bearing box 24 and the hammer case 4. The hammer case 4 is sandwiched between the left housing 2L and the right housing 2R. A part of the bearing box 24 and the rear part of the hammer case 4 are accommodated in the motor accommodating section 21. The bearing box 24 is fixed to each of the motor accommodating section 21 and the hammer case 4.

[0063] The hammer case 4 accommodates at least a portion of the reduction mechanism 7, the spindle 8, the striking mechanism 9, and the anvil 10. At least a portion of the reduction mechanism 7 is disposed inside the bearing box 24. The reduction mechanism 7 includes a plurality of gears.

[0064] The hammer case cover 5 covers at least a part of the surface of the hammer case 4. The hammer case cover 5 is made of synthetic resin. In the embodiment, the hammer case cover 5 is made of polycarbonate resin. The hammer case cover 5 protects the hammer case 4. The hammer case cover 5 prevents the hammer case 4 from coming into contact with objects around the impact tool 1. The hammer case cover 5 prevents the hammer case 4 from coming into contact with an operator.

[0065] The motor 6 is a power source of the impact tool 1. The motor 6 is an inner rotor type brushless motor. The motor 6 has a stator 26 and a rotor 27. The stator 26 is supported by the motor housing portion 21. At least a portion of the rotor 27 is disposed inside the stator 26. The rotor 27 rotates relative to the stator 26. The rotor 27 rotates about a rotation axis AX extending in the front-rear direction.

[0066] The stator 26 includes a stator core 28 , a front insulator 29 , a rear insulator 30 , and a coil 31 .

[0067] The stator core 28 is disposed radially outward of the rotor 27. The stator core 28 includes a plurality of stacked steel plates. The steel plates are metal plates whose main component is iron. The stator core 28 is cylindrical. The stator core 28 has a plurality of teeth that support the coils 31.

[0068] The front insulator 29 is provided at the front of the stator core 28. The rear insulator 30 is provided at the rear of the stator core 28. The front insulator 29 and the rear insulator 30 are each an electrical insulating member made of synthetic resin. The front insulator 29 is disposed so as to cover a portion of the surface of the teeth. The rear insulator 30 is disposed so as to cover a portion of the surface of the teeth.

[0069] The coil 31 is attached to the stator core 28 via the front insulator 29 and the rear insulator 30. A plurality of coils 31 are arranged. The coils 31 are arranged around the teeth of the stator core 28 via the front insulator 29 and the rear insulator 30. The coils 31 and the stator core 28 are electrically insulated by the front insulator 29 and the rear insulator 30. The multiple coils 31 are connected via fusing terminals 38.

[0070] The rotor 27 rotates about a rotation axis AX. The rotor 27 includes a rotor core 32, a rotor shaft 33, a rotor magnet , and a sensor magnet .

[0071] The rotor core 32 and the rotor shaft 33 are each made of steel. A front portion of the rotor shaft 33 protrudes forward from a front end surface of the rotor core 32. A rear portion of the rotor shaft 33 protrudes rearward from a rear end surface of the rotor core 32.

[0072] The rotor magnet 34 is fixed to the rotor core 32. The rotor magnet 34 is cylindrical. The rotor magnet 34 is disposed around the rotor core 32.

[0073] The sensor magnet 35 is fixed to the rotor core 32. The sensor magnet 35 is annular. The sensor magnet 35 is disposed on the front end surface of the rotor core 32 and the front end surface of the rotor magnet .

[0074] A sensor board 37 is attached to the front insulator 29. The sensor board 37 is fixed to the front insulator 29 with screws 29S. The sensor board 37 has a disk-shaped circuit board with a hole in the center, and a rotation detection element supported by the circuit board. At least a portion of the sensor board 37 faces the sensor magnet 35. The rotation detection element detects the position of the sensor magnet 35 of the rotor 27, thereby detecting the position of the rotor 27 in the rotational direction.

[0075] The rotor shaft 33 is rotatably supported by rotor bearings 39. The rotor bearings 39 include a front rotor bearing 39F that rotatably supports a front portion of the rotor shaft 33, and a rear rotor bearing 39R that rotatably supports a rear portion of the rotor shaft 33.

[0076] The front rotor bearing 39F is held in the bearing box 24. The bearing box 24 has a recess 24A recessed forward from the rear surface of the bearing box 24. The front rotor bearing 39F is disposed in the recess 24A. The rear rotor bearing 39R is held in the rear cover 3. The front end of the rotor shaft 33 is disposed in the internal space of the hammer case 4 through an opening in the bearing box 24.

[0077] A pinion gear 41 is formed on the front end of the rotor shaft 33. The pinion gear 41 is connected to at least a part of the reduction gear mechanism 7. The rotor shaft 33 is connected to the reduction gear mechanism 7 via the pinion gear 41.

[0078] The reduction mechanism 7 is disposed forward of the motor 6. The reduction mechanism 7 connects the rotor shaft 33 and the spindle 8. The reduction mechanism 7 transmits the rotation of the rotor 27 to the spindle 8. The reduction mechanism 7 rotates the spindle 8 at a rotational speed lower than the rotational speed of the rotor shaft 33. The reduction mechanism 7 includes a planetary gear mechanism.

[0079] The reduction mechanism 7 has a plurality of gears. The gears of the reduction mechanism 7 are driven by a rotor 27.

[0080] The reduction mechanism 7 has a plurality of planetary gears 42 arranged around the pinion gear 41, and an internal gear 43 arranged around the plurality of planetary gears 42. The pinion gear 41, the planetary gear 42, and the internal gear 43 are housed in the hammer case 4 and the bearing box 24, respectively. Each of the plurality of planetary gears 42 meshes with the pinion gear 41. The planetary gear 42 is rotatably supported by the spindle 8 via a pin 42P. The spindle 8 is rotated by the planetary gear 42. The internal gear 43 has internal teeth that mesh with the planetary gear 42. The internal gear 43 is fixed to the bearing box 24. The internal gear 43 is always non-rotatable with respect to the bearing box 24.

[0081] When the rotor shaft 33 is rotated by the drive of the motor 6, the pinion gear 41 rotates and the planetary gear 42 revolves around the pinion gear 41. The planetary gear 42 revolves while meshing with the internal teeth of the internal gear 43. Due to the revolution of the planetary gear 42, the spindle 8 connected to the planetary gear 42 via the pin 42P rotates at a rotational speed lower than the rotational speed of the rotor shaft 33.

[0082] The spindle 8 is disposed forward of at least a portion of the motor 6. The spindle 8 is disposed forward of the stator 26. At least a portion of the spindle 8 is disposed forward of the rotor 27. At least a portion of the spindle 8 is disposed forward of the reduction mechanism 7. The spindle 8 is rotated by the rotor 27. The spindle 8 is rotated by the rotational force of the rotor 27 transmitted by the reduction mechanism 7.

[0083] The spindle 8 has a flange portion 8A and a spindle shaft portion 8B protruding forward from the flange portion 8A. The planetary gear 42 is rotatably supported on the flange portion 8A via a pin 42P. The rotation axis of the spindle 8 and the rotation axis AX of the motor 6 coincide with each other. The spindle 8 rotates about the rotation axis AX. The spindle 8 is rotatably supported by a spindle bearing 44. A peripheral wall portion 8C is provided at the rear end of the spindle 8. The peripheral wall portion 8C is provided so as to surround the spindle bearing 44. The spindle bearing 44 supports the peripheral wall portion 8C.

[0084] The bearing box 24 is disposed around at least a portion of the periphery of the spindle 8. The spindle bearing 44 is held in the bearing box 24. The bearing box 24 has a recess 24B recessed rearward from the front surface of the bearing box 24. The spindle bearing 44 is disposed in the recess 24B.

[0085] The striking mechanism 9 is driven by the motor 6. The rotational force of the motor 6 is transmitted to the striking mechanism 9 via the reduction mechanism 7 and the spindle 8. The striking mechanism 9 strikes the anvil 10 in the rotational direction based on the rotational force of the spindle 8 rotated by the motor 6. The striking mechanism 9 has a hammer 47, a ball 48, and a coil spring 49. The striking mechanism 9 including the hammer 47 is housed in the hammer case 4.

[0086] The hammer 47 is disposed forward of the reduction mechanism 7. The hammer 47 is disposed around the spindle 8. The hammer 47 is held by the spindle 8. The ball 48 is disposed between the spindle 8 and the hammer 47. The coil spring 49 is supported by each of the spindle 8 and the hammer 47.

[0087] The hammer 47 is cylindrical. The hammer 47 is disposed around the spindle shaft portion 8B. The hammer 47 has a hole 47A in which the spindle shaft portion 8B is disposed.

[0088] The hammer 47 is rotated by the motor 6. The rotational force of the motor 6 is transmitted to the hammer 47 via the reduction mechanism 7 and the spindle 8. The hammer 47 can rotate together with the spindle 8 based on the rotational force of the spindle 8 rotated by the motor 6. The rotation axis of the hammer 47, the rotation axis of the spindle 8, and the rotation axis AX of the motor 6 coincide with each other. The hammer 47 rotates around the rotation axis AX.

[0089] The ball 48 is made of a metal such as steel. The ball 48 is disposed between the spindle shaft portion 8B and the hammer 47. The spindle 8 has a spindle groove 8D in which at least a part of the ball 48 is disposed. The spindle groove 8D is provided on a part of the outer surface of the spindle shaft portion 8B. The hammer 47 has a hammer groove 47B in which at least a part of the ball 48 is disposed. The hammer groove 47B is provided on a part of the inner surface of the hammer 47. The ball 48 is disposed between the spindle groove 8D and the hammer groove 47B. The ball 48 can roll on the inside of the spindle groove 8D and the inside of the hammer groove 47B. The hammer 47 can move along with the ball 48. The spindle 8 and the hammer 47 can move relative to each other in the axial direction and the rotational direction within a movable range defined by the spindle groove 8D and the hammer groove 47B.

[0090] The coil spring 49 generates an elastic force that moves the hammer 47 forward. The coil spring 49 is disposed between the flange portion 8A and the hammer 47. A ring-shaped recess 47C is provided on the rear surface of the hammer 47. The recess 47C is recessed forward from the rear surface of the hammer 47. A washer 45 is provided inside the recess 47C. The rear end of the coil spring 49 is supported by the flange portion 8A. The front end of the coil spring 49 is disposed inside the recess 47C and supported by the washer 45.

[0091] At least a portion of the anvil 10 is disposed forward of the hammer 47. The anvil 10 has a tool hole 10A into which a tool bit is inserted. The tool hole 10A is provided at the front end of the anvil 10. The tool bit is attached to the anvil 10. The anvil 10 also has a spindle protrusion 10B connected to the front end of the spindle shaft portion 8B. The spindle protrusion 10B is provided at the rear end of the anvil 10. The spindle protrusion 10B is inserted into a recess provided at the front end of the spindle shaft portion 8B.

[0092] The anvil 10 has a rod-shaped anvil body 101 and an anvil protrusion 102. The tool hole 10A is provided at the front end of the anvil body 101. The tool tip is attached to the anvil body 101. The anvil protrusion 102 is provided at the rear end of the anvil 10. The anvil protrusion 102 protrudes radially outward from the rear end of the anvil body 101.

[0093] The anvil 10 is rotatably supported by a bearing 46. The rotation axis of the anvil 10, the rotation axis of the hammer 47, the rotation axis of the spindle 8, and the rotation axis AX of the motor 6 are coincident with each other. The anvil 10 rotates around the rotation axis AX. The bearing 46 is held by the hammer case 4. In this embodiment, two bearings 46 are arranged in the front-rear direction.

[0094] An example of the type of bearing 46 is an iron sleeve (oil-impregnated metal).

[0095] At least a portion of the hammer 47 is capable of contacting the anvil protrusion 102. A hammer protrusion that protrudes forward is provided at the front of the hammer 47. The hammer protrusion of the hammer 47 and the anvil protrusion 102 are capable of contacting each other. When the motor 6 is driven while the hammer 47 and the anvil protrusion 102 are in contact with each other, the anvil 10 rotates together with the hammer 47 and the spindle 8.

[0096] The anvil 10 is struck in the rotational direction by the hammer 47. For example, in a screw tightening operation, when the load acting on the anvil 10 becomes high, a situation may occur in which the anvil 10 cannot be rotated by the power generated by the motor 6 alone. When the anvil 10 cannot be rotated by the power generated by the motor 6 alone, the rotation of the anvil 10 and the hammer 47 stops. The spindle 8 and the hammer 47 can move relatively in the axial direction and the circumferential direction via the ball 48. Even if the rotation of the hammer 47 stops, the rotation of the spindle 8 continues by the power generated by the motor 6. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the ball 48 moves backward while being guided by each of the spindle groove 8D and the hammer groove 47B. The hammer 47 receives a force from the ball 48 and moves backward along with the ball 48. That is, the hammer 47 moves backward by the rotation of the spindle 8 while the rotation of the anvil 10 is stopped. As the hammer 47 moves rearward, the contact between the hammer 47 and the anvil protrusion 102 is released.

[0097] The coil spring 49 generates an elastic force that moves the hammer 47 forward. The hammer 47 that has moved backward moves forward due to the elastic force of the coil spring 49. When the hammer 47 moves forward, it receives a force in the rotational direction from the ball 48. That is, the hammer 47 moves forward while rotating. When the hammer 47 moves forward while rotating, the hammer 47 comes into contact with the anvil protrusion 102 while rotating. As a result, the anvil protrusion 102 is struck in the rotational direction by the hammer 47. Both the power of the motor 6 and the inertial force of the hammer 47 act on the anvil 10. Therefore, the anvil 10 can rotate about the rotation axis AX with high torque.

[0098] The bit sleeve 11 is disposed around the front portion of the anvil 10. The bit sleeve 11 holds an accessory tool inserted into the tool hole 10A.

[0099] The fan 12 is disposed behind the stator 26 of the motor 6. The fan 12 generates an airflow for cooling the motor 6. The fan 12 is fixed to at least a part of the rotor 27. The fan 12 is fixed to the rear part of the rotor shaft 33 via a bush 12A. The fan 12 is disposed between the rear rotor bearing 39R and the stator 26. The fan 12 rotates by the rotation of the rotor 27. The fan 12 rotates together with the rotor shaft 33 by the rotation of the rotor shaft 33. By the rotation of the fan 12, air in the external space of the housing 2 flows into the internal space of the housing 2 through the intake port 19. The air that has flowed into the internal space of the housing 2 cools the motor 6 by circulating through the internal space of the housing 2. By the rotation of the fan 12, the air that has circulated through the internal space of the housing 2 flows out to the external space of the housing 2 through the exhaust port 20.

[0100] The battery mounting section 13 is disposed below the battery connect section 23. The battery mounting section 13 is connected to the battery pack 25. The battery pack 25 is mounted to the battery mounting section 13. The battery pack 25 is detachable from the battery mounting section 13. The battery pack 25 includes a secondary battery. In the embodiment, the battery pack 25 includes a rechargeable lithium-ion battery. When mounted to the battery mounting section 13, the battery pack 25 can supply power to the impact tool 1. The motor 6 is driven based on the power supplied from the battery pack 25.

[0101] The trigger switch 14 is provided on the grip portion 22. The trigger switch 14 is operated by an operator to start the motor 6. By operating the trigger switch 14, the motor 6 is switched between being driven and being stopped.

[0102] The forward / reverse switching lever 15 is provided on the upper part of the grip portion 22. The forward / reverse switching lever 15 is operated by an operator. By operating the forward / reverse switching lever 15, the rotation direction of the motor 6 is switched from one of the forward direction and the reverse direction to the other. By switching the rotation direction of the motor 6, the rotation direction of the spindle 8 is switched.

[0103] The operation panel 16 is provided in the battery connector 23. The operation panel 16 is operated by an operator to switch the control mode of the motor 6. The operation panel 16 has an impact force switch 16A and a dedicated switch 16B. Each of the impact force switch 16A and the dedicated switch 16B is operated by an operator. The control mode of the motor 6 is switched by operating at least one of the impact force switch 16A and the dedicated switch 16B.

[0104] The hand mode switching button 17 is provided on the upper part of the trigger switch 14. The hand mode switching button 17 is operated by an operator. By operating the hand mode switching button 17, the control mode of the motor 6 is switched.

[0105] <Light unit> Fig. 5 is a perspective view showing an upper part of the impact tool 1 according to the embodiment. Fig. 6 is an exploded perspective view showing an upper part of the impact tool 1 according to the embodiment. Fig. 7 is a cross-sectional view taken along line AA in Fig. 5. Fig. 8 is a cross-sectional view taken along line BB in Fig. 5.

[0106] The impact tool 1 includes a light unit 18, a fixing member 50, and a buffer member 51.

[0107] The light unit 18 emits illumination light. The light unit 18 illuminates the anvil 10 and the periphery of the anvil 10 with the illumination light. The light unit 18 illuminates the front of the anvil 10 with the illumination light. The light unit 18 also illuminates the tip tool attached to the anvil 10 and the periphery of the tip tool with the illumination light.

[0108] The light unit 18 is supported by the hammer case 4. The light unit 18 is disposed in the front part of the hammer case 4. The light unit 18 is disposed around at least a part of the periphery of the hammer case 4.

[0109] The hammer case 4 has a hammer accommodating portion 401 which is a first cylindrical portion, and a bearing support portion 402 which is a second cylindrical portion. The hammer accommodating portion 401 is cylindrical. The hammer accommodating portion 401 is disposed around the striking mechanism 9. The hammer accommodating portion 401 accommodates at least the hammer 47. The bearing support portion 402 is cylindrical. The bearing support portion 402 is disposed forward of the hammer accommodating portion 401. The outer diameter of the bearing support portion 402 is smaller than the outer diameter of the hammer accommodating portion 401. The bearing support portion 402 is disposed around the bearing 46. The bearing support portion 402 supports the bearing 46.

[0110] The light unit 18 is disposed around the bearing support portion 402. The hammer case cover 5 covers at least a portion of the outer surface of the hammer accommodating portion 401. A rear portion of the hammer accommodating portion 401 is accommodated in the motor accommodating portion 21 of the housing 2.

[0111] The light unit 18 has a light substrate 60 , a light 61 , a light cover 62 , and an adhesive resin part 63 .

[0112] The light board 60 is disposed at least partially around the hammer case 4. In the embodiment, the light board 60 is annular. More specifically, the light board 60 is substantially hexagonal. The light board 60 is disposed around the bearing support portion 402. The light board 60 includes a printed circuit board (PCB). The light board 60 has wiring connected to the lights 61.

[0113] The light 61 is a light source that emits illumination light. The light 61 includes, for example, a light emitting diode (LED). The light 61 is supported by the light board 60. Power is supplied to the light 61 via wiring of the light board 60. The light 61 is arranged on at least a portion of the front surface of the light board 60. A plurality of lights 61 are arranged on the light board 60. The light 61 has a light emission surface 64 that emits illumination light. The light emission surface 64 faces forward. The front surface of the light 61 includes the light emission surface 64. The multiple lights 61 illuminate the anvil 10 and the area around the anvil 10.

[0114] The light cover 62 is arranged to cover the front surface of the light board 60. At least a portion of the light cover 62 is arranged forward of the light board 60 and the light 61. The light cover 62 contacts the front surface and side surface of the light board 60. The side surface of the light board 60 includes an inner side surface facing radially inward and an outer side surface facing radially outward. In the embodiment, the light cover 62 is annular. The light cover 62 is arranged around the bearing support portion 402. The light cover 62 is arranged forward of the hammer case cover 5.

[0115] The light cover 62 has a passing portion 65 through which the illumination light emitted from the light exit surface 64 of the light 61 passes. In the embodiment, the light cover 62 is arranged so as to cover the light exit surface 64 of the light 61. At least a portion of the light cover 62 faces the light exit surface 64. The light cover 62 is made of a light-transmitting synthetic resin. In the embodiment, the light cover 62 is made of a polycarbonate resin. The portion of the light cover 62 facing the light exit surface 64 functions as a light transmitting portion that transmits the illumination light emitted from the light exit surface 64. The passing portion 65 of the light cover 62 includes a light transmitting portion. The light cover 62 may be in contact with the light exit surface 64 or may be separated from the light exit surface 64.

[0116] The passing portion 65 does not have a lens effect. The passing portion 65 does not refract the light emitted from the light exit surface 64 of the light 61. The passing portion 65 may be, for example, a parallel plate. The passing portion 65 may have a lens effect. The passing portion 65 may diffuse the light emitted from the light exit surface 64 of the light 61.

[0117] The light cover 62 protects the light board 60 and the light 61. The light cover 62 prevents contact between the light board 60 and objects around the impact tool 1. The light cover 62 also prevents contact between the light 61 and objects around the impact tool 1. The light cover 62 has a waterproof function that prevents moisture from entering the light board 60 and the light 61. The light cover 62 has a dustproof function that prevents dust from entering the light board 60 and the light 61.

[0118] The adhesive resin part 63 fixes the light board 60 and the light cover 62. At least a part of the adhesive resin part 63 covers the rear surface and the side surfaces of the light board 60.

[0119] The fixing member 50 contacts at least a part of the front surface of the light cover 62. The fixing member 50 is supported by the bearing support portion 402. The fixing member 50 contacts at least a part of the front surface of the light cover 62 so that the light unit 18 including the light cover 62 does not slip out forward from the bearing support portion 402.

[0120] In the embodiment, the fixing member 50 includes a ring spring. A support groove 52 is provided on the outer surface of the bearing support portion 402. The support groove 52 is formed to surround the rotation axis AX. The ring spring is disposed in the support groove 52. Note that the fixing member 50 is not limited to the ring spring, and may be, for example, a bumper, a metal sleeve, a circlip, or the like.

[0121] At least a portion of the light cover 62 contacts the hammer case cover 5. In the embodiment, at least a portion of the rear of the light cover 62 contacts the hammer case cover 5. The light unit 18 including the light cover 62 is sandwiched between the fixing member 50 and the hammer case cover 5 in the front-rear direction.

[0122] In the embodiment, the front end portion of the hammer case cover 5 is disposed radially inward from the rear end portion of the light cover 62. The outer surface of the light cover 62 is not covered by the hammer case cover 5.

[0123] The cushioning member 51 is disposed between the light cover 62 and the hammer case 4. The cushioning member 51 suppresses the vibration of the hammer case 4 from being transmitted to the light unit 18. The cushioning member 51 suppresses the heat of the hammer case 4 from being transmitted to the light unit 18. The cushioning member 51 contacts the light unit 18. More specifically, the cushioning member 51 contacts the light cover 62 and the adhesive resin portion 63. The cushioning member 51 contacts the hammer case 4. The hammer case cover 5 and the cushioning member 51 are separated from each other.

[0124] A porous member made of synthetic resin is exemplified as the cushioning member 51. An example of the porous member is soft urethane sponge.

[0125] As shown in FIG. 7, the light cover 62 has a front fixing portion 62A, an inner support portion 62B, an outer support portion 62C, and a rear fixing portion 62D. The front fixing portion 62A fits into a recess 402A provided on the outer surface of the bearing support portion 402. The inner support portion 62B supports the inner surface of the light board 60 facing inward in the radial direction. The inner support portion 62B and the inner surface of the light board 60 can come into contact with each other. The outer support portion 62C supports the outer surface of the light board 60 facing outward in the radial direction. The outer support portion 62C and the outer surface of the light board 60 can come into contact with each other. The rear fixing portion 62D fits into a recess 5E provided on the front end portion of the hammer case cover 5.

[0126] As shown in Fig. 6, a notch 5F is provided at the bottom of the front end of the hammer case cover 5. An engagement portion 62F provided at the bottom of the light cover 62 fits into the notch 5F. This prevents the hammer case cover 5 and the light cover 62 from rotating relative to each other. In addition, a locking portion 62G that prevents the fixing member 50 from rotating is provided at the bottom of the front end of the light cover 62. The locking portion 62G prevents the light cover 62 and the fixing member 50 from rotating relative to each other.

[0127] 8, the light cover 62 has a recess 62E. The recess 62E is formed so as to be recessed forward from the rear surface of the light cover 62. The light 61 is disposed in a space formed by the recess 62E.

[0128] 9 is a front view showing the relationship between the light board 60 and the light 61 and the hammer case 4 according to the embodiment. The light board 60 is disposed radially outward of the bearing support part 402. The bearing support part 402 has corners 403 protruding radially outward. Six corners 403 are provided at equal intervals around the rotation axis AX. In the embodiment, at least a part of the bearing support part 402 is hexagonal in a plane perpendicular to the rotation axis AX. In the following description, the hexagonal part of the bearing support part 402 including the six corners 403 is appropriately referred to as a rotation stopper part 404.

[0129] The light board 60 is formed in an annular shape having six corners 60C in accordance with the outer shape of the anti-rotation portion 404 of the bearing support portion 402.

[0130] A plurality of lights 61 are mounted on the light board 60. A plurality of lights 61 are provided around the rotation axis AX. In the embodiment, the lights 61 include a plurality of left lights 611 provided to the left of the rotation axis AX, and a plurality of right lights 612 provided to the right of the rotation axis AX. The right lights 612 are provided in the same number as the left lights 611.

[0131] In the embodiment, four lights 61 are provided on the light board 60. Two left lights 611 are provided. The left lights 611 include a left light 611A and a left light 611B. Two right lights 612 are provided. The right lights 612 include a right light 612A and a right light 612B.

[0132] In the radial direction, the distance between the rotation axis AX and the left light 611A, the distance between the rotation axis AX and the left light 611B, the distance between the rotation axis AX and the right light 612A, and the distance between the rotation axis AX and the right light 612B are substantially equal. When diagonal lines La and Lb that pass through the rotation axis AX and are perpendicular to the rotation axis AX are defined, the left light 611A and the right light 612B are disposed on the diagonal line La, and the left light 611B and the right light 612A are disposed on the diagonal line Lb. In addition, the left light 611A and the right light 612A are disposed above the rotation axis AX, and the left light 611B and the right light 612B are disposed below the rotation axis AX. In the vertical direction, the position of the left light 611A and the position of the right light 612A are substantially equal. In the vertical direction, the position of the left light 611B and the position of the right light 612B are substantially equal. In the left-right direction, the position of the left light 611A and the position of the left light 611B are substantially equal. In the left-right direction, the position of the right light 612A and the position of the right light 612B are substantially equal. When a symmetry axis that passes through the rotation axis AX and extends in the up-down direction is defined, the left lights 611 (611A, 611B) and the right lights 612 (612A, 612B) are line-symmetric.

[0133] Fig. 10 is a front perspective view showing the light board 60, the light 61, and the light cover 62 according to the embodiment. Fig. 11 is a rear perspective view showing the light board 60, the light 61, and the light cover 62 according to the embodiment. Fig. 12 is an exploded front perspective view showing the light board 60, the light 61, and the light cover 62 according to the embodiment. Fig. 13 is an exploded rear perspective view showing the light board 60, the light 61, and the light cover 62 according to the embodiment.

[0134] The light cover 62 is annular. The light cover 62 has a board groove 66 in which the light board 60 is disposed. The light board 60 is disposed in the board groove 66 so that the light emission surface 64 of the light 61 faces forward.

[0135] The light cover 62 has a recess 67 in which the anti-rotation portion 404 of the bearing support portion 402 is disposed. The inner shape of the recess 67 is hexagonal to match the outer shape of the anti-rotation portion 404. The recess 67 has six corners 67C in which the six corners 403 of the anti-rotation portion 404 are disposed. By disposing the anti-rotation portion 404 in the recess 67, relative rotation between the bearing support portion 402 and the light cover 62 is suppressed.

[0136] The adhesive resin part 63 fixes the light board 60 and the light cover 62. At least a part of the adhesive resin part 63 covers the rear surface and the side surface of the light board 60. After the light board 60 is placed in the board groove 66 so that the light emission surface 64 of the light 61 faces forward, molten synthetic resin is supplied to the boundary between the light board 60 and the light cover 62 from the rear of the light board 60. The adhesive resin part 63 is formed by solidifying the synthetic resin. The light board 60 and the light cover 62 are fixed by the adhesive resin part 63 by solidifying the synthetic resin.

[0137] 6, the buffer member 51 is annular. The buffer member 51 is disposed around the anti-rotation portion 404 of the bearing support portion 402. The buffer member 51 is formed in an annular shape having six corners 51C that match the outer shape of the anti-rotation portion 404. Relative rotation between the buffer member 51 and the anti-rotation portion 404 is suppressed.

[0138] The hammer case cover 5 is fixed to the motor accommodating portion 21 of the housing 2. In an embodiment, the hammer case cover 5 has a cover portion 5A, a ring portion 5B, and a hook portion 5C. The cover portion 5A covers at least a portion of the outer surface of the hammer accommodating portion 401. The cover portion 5A is cylindrical. The ring portion 5B is disposed at the front end portion of the cover portion 5A. The ring portion 5B faces the rear end portion of the light cover 62. The hook portion 5C is disposed at the rear portion of the cover portion 5A. The hook portion 5C is hooked onto the housing 2.

[0139] 14 is an exploded perspective view showing the impact tool 1 according to the embodiment. The housing 2 includes a left housing 2L and a right housing 2R. In the embodiment, at least a part of the hammer case cover 5 is fixed to the housing 2 by being sandwiched between the left housing 2L and the right housing 2R. In the embodiment, a rear part of the cover portion 5A and the hook portion 5C are sandwiched between the left housing 2L and the right housing 2R.

[0140] The hook portions 5C are provided on the left and right portions of the cover portion 5A. Recesses 200 into which the hook portions 5C are hooked are provided on the inner surfaces of the left housing 2L and the right housing 2R.

[0141] A protrusion 4A for positioning the hammer case cover 5 is provided on a part of the hammer case 4. An opening 5D (see FIG. 6) is provided on a part of the hammer case cover 5. The hammer case 4 and the hammer case cover 5 are positioned by disposing the protrusion 4A in the opening 5D.

[0142] When assembling the impact tool 1, the hammer case 4 and the hammer case cover 5 are connected so that the outer surface of the hammer housing portion 401 is covered by the cover portion 5A. The convex portion 4A is disposed in the opening 5D, so that the outer surface of the hammer housing portion 401 is covered by the cover portion 5A. In addition, the buffer member 51 and the light unit 18 are attached to the bearing support portion 402. The buffer member 51 and the light unit 18 are inserted into the bearing support portion 402 from the front of the bearing support portion 402. The buffer member 51 and the light unit 18 are attached to the anti-rotation portion 404. After the buffer member 51 and the light unit 18 are attached to the anti-rotation portion 404, the fixing member 50 is placed in the support groove 52. After the hammer case 4 and the hammer case cover 5 are connected and the cushioning member 51, the light unit 18, and the fixing member 50 are attached to the bearing support portion 402, at least a portion of the hammer case 4 and the hammer case cover 5 are sandwiched between the left housing 2L and the right housing 2R. The hook portion 5C is hooked onto recesses provided in the left housing 2L and the right housing 2R. After at least a portion of the hammer case 4 and the hammer case cover 5 are sandwiched between the left housing 2L and the right housing 2R, the left housing 2L and the right housing 2R are fixed together with a plurality of screws 2S. In addition, the rear cover 3 is fixed to the rear of the motor housing portion 21 with screws 3S.

[0143] <Operation of impact tool> Next, the operation of the impact tool 1 will be described. For example, when performing a screw tightening operation on a workpiece, a tip tool (driver bit) used for the screw tightening operation is inserted into the tool hole 10A of the anvil 10. The tip tool inserted into the tool hole 10A is held by the bit sleeve 11. After the tip tool is attached to the anvil 10, the operator grips the grip portion 22 and operates the trigger switch 14. When the trigger switch 14 is operated, power is supplied from the battery pack 25 to the motor 6, the motor 6 is started, and at the same time, the light 61 is turned on. When the motor 6 is started, the rotor shaft 33 of the rotor 27 rotates. When the rotor shaft 33 rotates, the rotational force of the rotor shaft 33 is transmitted to the planetary gear 42 via the pinion gear 41. The planetary gear 42 revolves around the pinion gear 41 while rotating on its own axis in a state where it is engaged with the internal teeth of the internal gear 43. The planetary gear 42 is rotatably supported by the spindle 8 via a pin 42P. The revolution of the planetary gear 42 causes the spindle 8 to rotate at a rotational speed lower than the rotational speed of the rotor shaft 33.

[0144] When the spindle 8 rotates while the hammer 47 and the anvil protrusion 102 are in contact with each other, the anvil 10 rotates together with the hammer 47 and the spindle 8. As the anvil 10 rotates, the screw tightening operation progresses.

[0145] When a load equal to or greater than a predetermined value acts on the anvil 10 as the screw tightening operation progresses, the rotation of the anvil 10 and the hammer 47 stops. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the hammer 47 moves rearward. As the hammer 47 moves rearward, the hammer 47 is released from contact with the anvil protrusion 102. The hammer 47 that has moved rearward moves forward while rotating due to the elastic force of the coil spring 49. As the hammer 47 moves forward while rotating, the anvil 10 is struck in the rotational direction by the hammer 47. This causes the anvil 10 to rotate about the rotation axis AX with high torque. Therefore, the screw is tightened to the workpiece with high torque.

[0146] <Effects> As described above, in the embodiment, the impact tool 1 includes the motor 6, the impact mechanism 9 driven by the motor 6, the anvil 10 to which a tool tip is attached and which is struck in a rotational direction by the impact mechanism 9, and the hammer case 4 that houses the impact mechanism 9. The impact tool 1 includes a light board 60 that is disposed on at least a portion of the periphery of the hammer case 4. The impact tool 1 includes a plurality of lights 61 that are disposed on at least a portion of the front surface of the light board 60. The impact tool 1 includes a light cover 62, at least a portion of which is disposed forward of the light board 60 and has a passage portion 65 through which illumination light emitted from a light emission surface 64 of the light 61 passes.

[0147] In the above configuration, the light 61 is protected by the light cover 62. Therefore, damage to the light 61 is suppressed.

[0148] In an embodiment, the light cover 62 contacts the front and sides of the light board 60 .

[0149] In the above configuration, the light cover 62 protects the front and side surfaces of the light board 60 .

[0150] In the embodiment, the light cover 62 has a light transmitting portion facing the light exit surface 64. The passing portion 65 includes the light transmitting portion.

[0151] In the above configuration, the light transmitting portion protects the light 61. Illumination light emitted from the light exit surface 64 of the light 61 passes through the light transmitting portion and is irradiated toward the front of the impact tool 1.

[0152] In the embodiment, the light transmitting portion diffuses the illumination light emitted from the light exit surface 64 .

[0153] In the above configuration, the illumination light emitted from the light exit surface 64 of the light 61 is diffused by the light transmitting portion, so that the illumination light is irradiated over a wide area in front of the impact tool 1.

[0154] In the embodiment, the light cover 62 has a substrate groove 66. The light substrate 60 is disposed in the substrate groove 66 such that the light exit surface 64 faces forward.

[0155] In the above configuration, the board groove 66 ensures proper alignment of the light cover 62 and the light board 60 .

[0156] In the embodiment, the impact tool 1 includes an adhesive resin part 63 that fixes the light board 60 and the light cover 62. At least a part of the adhesive resin part 63 covers the rear surface and the side surface of the light board 60.

[0157] In the above configuration, the light board 60 and the light cover 62 are fixed together by the adhesive resin part 63. The rear and side surfaces of the light board 60 are also protected by the adhesive resin part 63. The light board 60 and the light 61 are also protected by the adhesive resin part 63. The light board 60 and the light 61 are protected from dust and water by the adhesive resin part 63.

[0158] In the embodiment, the hammer case 4 has a hammer housing portion 401 (first cylindrical portion) arranged around the striking mechanism 9, and a bearing support portion 402 (second cylindrical portion) arranged forward of the hammer housing portion 401 and having an outer diameter smaller than that of the hammer housing portion 401. The light cover 62 is arranged around the bearing support portion 402.

[0159] In the above configuration, the light cover 62 is disposed around the small-diameter bearing support portion 402, which prevents the impact tool 1 from becoming larger. In particular, the hammer accommodating portion 401 is prevented from becoming larger (larger in diameter). Since the hammer accommodating portion 401 is prevented from becoming larger (larger in diameter), the workability of using the impact tool 1 is improved.

[0160] In an embodiment, the bearing support portion 402 may have a corner portion 403 that protrudes radially outward. The light cover 62 has a recess 67 in which the corner portion 403 is disposed.

[0161] In the above configuration, the light cover 62 and the bearing support portion 402 are properly aligned. Furthermore, relative rotation between the light cover 62 and the bearing support portion 402 is suppressed.

[0162] In an embodiment, the impact tool 1 comprises a fixing member 50 supported on the bearing support 402 and in contact with at least a portion of the front surface of the light cover 62 .

[0163] In the above configuration, the fixing member 50 prevents the light cover 62 from slipping out forward from the bearing support portion 402. Furthermore, relative movement between the light cover 62 and the bearing support portion 402 in the front-rear direction is prevented.

[0164] In an embodiment, the fixing member 50 includes at least one of a ring spring, a bumper, a metal sleeve, and a circlip, which is disposed in a support groove 52 provided in the bearing support portion 402 .

[0165] In the above configuration, the ring spring or the like prevents the light cover 62 from slipping forward from the bearing support part 402. In addition, since the ring spring or the like is detachable from the bearing support part 402, the light cover 62 can be smoothly removed from the bearing support part 402 or replaced. This improves the ease of maintenance of the light board 60 and the light 61.

[0166] In an embodiment, the impact tool 1 includes a bearing 46 that supports the anvil 10. The bearing support 402 is disposed around the bearing 46.

[0167] In the above configuration, the light cover 62 is disposed around the bearing support portion 402 that supports the bearing 46 .

[0168] In the embodiment, the impact tool 1 includes a hammer case cover 5 that covers at least a part of the outer surface of the hammer accommodating portion 401. At least a part of the light cover 62 contacts the hammer case cover 5.

[0169] In the above configuration, the rear part of the light cover 62 does not contact the hammer case 4 but contacts the hammer case cover 5, so that the transmission of vibration and heat of the hammer case 4 to the light cover 62 is suppressed. In addition, the hammer housing part 401 is protected by the hammer case cover 5. In addition, the hammer case cover 5 suppresses contact between the hammer case 4 and surrounding objects.

[0170] In the embodiment, the front end portion of the hammer case cover 5 is disposed radially inward from the rear end portion of the light cover 62 .

[0171] In the above configuration, an increase in size (larger diameter) of the periphery of the light cover 62 is suppressed.

[0172] In the embodiment, the impact tool 1 includes a housing 2 that houses the motor 6 and at least a part of the hammer accommodating portion 401. The hammer case cover 5 is fixed to the housing 2.

[0173] In the above configuration, the hammer case 4 and the hammer case cover 5 are each supported by the housing 2.

[0174] In this embodiment, the hammer case cover 5 has a hook portion 5C that can be hung on the housing 2.

[0175] With the above-described configuration, the workability when fixing the hammer case cover 5 to the housing 2 is improved.

[0176] In the embodiment, the housing 2 includes a left housing 2L and a right housing 2R. At least a portion of the hammer case cover 5 is sandwiched between the left housing 2L and the right housing 2R.

[0177] With the above-described configuration, the workability when fixing the hammer case cover 5 to the housing 2 is improved.

[0178] In the embodiment, the impact tool 1 includes a buffer member 51 disposed between the light cover 62 and the hammer case 4 .

[0179] In the above configuration, the transmission of vibration and heat from the hammer case 4 to the light cover 62 is suppressed.

[0180] In this embodiment, a plurality of lights 61 are provided around the rotation axis AX of the anvil 10.

[0181] In the above configuration, the anvil 10 and the periphery of the anvil 10 are properly illuminated by the multiple lights 61. Therefore, deterioration of the operability when using the impact tool 1 is suppressed even in a dark place.

[0182] <Modification> Fig. 15 is a perspective view showing a light unit 180 according to a modified example. As shown in Fig. 15, the light cover 620 may have a light transmitting portion 650 facing the light exit surface 64 of the light 61, and a light blocking portion 651 facing the front surface of the light substrate 60. The light blocking portion 651 is formed by applying a coating liquid to a part of the light cover 620.

[0183] The light shielding portion 651 makes it difficult for the light board 60 to be seen from outside the light cover 620, thereby improving the aesthetic appearance of the impact tool 1. In addition, irradiation of the light board 60 by external light is suppressed.

[0184] 15, the light transmitting portion 650 may be a part of the light cover 620, or may be an optical member provided at the opening of the light cover 620. The optical member may have a lens effect. The optical member may diffuse the illumination light emitted from the light emission surface 64 of the light 61.

[0185] Fig. 16 is a diagram showing a light board 601 according to a modified example. In the above-described embodiment, the light board 60 is annular. As shown in Fig. 16, a notch 604 may be formed in a part of the light board 601. In the example shown in Fig. 16, the notch 604 is provided in the upper part of the light board 601. A lead wire 605 is provided in the lower part of the light board 601.

[0186] Fig. 17 is a diagram showing a light board 602 according to a modified example. As shown in Fig. 17, the light board 602 may include a left light board 602L provided on the left side of the rotation axis AX and a right light board 602R provided on the right side of the rotation axis AX. In the example shown in Fig. 17, the left light board 602L and the lower part of the right light board 602R are connected by a lead wire 606.

[0187] Fig. 18 is a diagram showing a light board 603 according to a modified example. As shown in Fig. 18, when the light board 603 has a left light board 603L and a right light board 603R, the left light board 603L and the right light board 603R may be connected by a flexible printed circuit board 607 (FPC: Flexible Printed Circuits). In the example shown in Fig. 18, an upper part of the left light board 603L and an upper part of the right light board 603R are connected by the flexible printed circuit board 607. A lower part of the left light board 603L and a lower part of the right light board 603R are connected by a lead wire 608.

[0188] In the above-described embodiment, the light 61 includes a plurality of left lights 611 provided to the left of the rotation axis AX, and a same number of right lights 612 provided to the right of the rotation axis AX as the left lights 611. It is sufficient that a plurality of lights 61 are provided around the rotation axis AX. For example, the light 61 may be disposed above the rotation axis AX.

[0189] In the above-described embodiment, the passage portion of the light cover may be an opening provided in a part of the light cover.

[0190] In the above-described embodiment, the impact tool 1 is an impact driver. The impact tool 1 may be an impact wrench.

[0191] In the above-described embodiment, the power source of the impact tool 1 does not have to be the battery pack 25, and may be a commercial power source (AC power source). [Explanation of symbols]

[0192] 1...impact tool, 2...housing, 2L...left housing, 2R...right housing, 2S...screw, 3...rear cover, 3S...screw, 4...hammer case, 4A...projection, 5...hammer case cover, 5A...cover part, 5B...ring part, 5C...hook part, 5D...opening, 5E...recess, 5F...notch, 6...motor, 7...reduction mechanism, 8...spindle, 8A...flange part, 8B...spindle shaft part, 8C...circumferential wall part, 8D...spindle groove, 9...impact mechanism, 10...anvil, 10A...tool hole, 10B...spindle projection, 11...bit sleeve, 12...fan, 12A...bucket shoe, 13...battery mounting section, 14...trigger switch, 15...forward / reverse switching lever, 16...operation panel, 16A...impact force switch, 16B...dedicated switch, 17...hand mode switching button, 18...light unit, 19...air intake, 20...air exhaust, 21...motor housing section, 22...grip section, 23...battery connector section, 24...bearing box, 24A...recess, 24B...recess, 25...battery pack, 26...stator, 27...rotor, 28...stator core, 29...front insulator, 29S...screw, 30...rear insulator, 31...coil, 32...rotor core , 33... rotor shaft, 34... rotor magnet, 35... sensor magnet, 37... sensor board, 38... fusing terminal, 39... rotor bearing, 39F... front rotor bearing, 39R... rear rotor bearing, 41... pinion gear, 42... planetary gear, 42P... pin, 43... internal gear, 44... spindle bearing, 45... washer, 46... bearing, 47... hammer, 47A... hole, 47B... hammer groove, 47C... recess, 48... ball, 49... coil spring, 50... fixing member, 51... cushioning member, 51C... corner, 52... support groove, 60... light a light board, 60C...corner, 61...light, 62...light cover, 62A...front fixing portion, 62B...inner support portion, 62C...outer support portion, 62D...rear fixing portion, 62E...recess, 62F...engagement portion, 62G...locking portion, 63...adhesive resin portion, 64...light exit surface, 65...passing portion, 66...board groove, 67...recess, 67C...corner, 101...anvil body, 102...anvil protrusion, 180...light unit, 200...recess, 401...hammer housing portion (first cylindrical portion), 402...bearing support portion (second cylindrical portion), 402A...recess, 403...corner, 404...rotation stopper portion, 601...light board,602...light board, 602L...left light board, 602R...right light board, 603...light board, 603L...left light board, 603R...right light board, 604...notch, 605...lead wire, 606...lead wire, 607...flexible printed circuit board, 608...lead wire, 611...left light, 611A...left light, 611B...left light, 612...right light, 612A...right light, 612B...right light, 620...light cover, 650...light transmitting portion, 651...light shielding portion, AX...rotating axis.

Claims

1. A motor; A striking mechanism driven by the motor; an anvil to which a tip tool is attached and which is struck in a rotational direction by the striking mechanism; A hammer case that houses the impact mechanism; A light board disposed around at least a portion of the periphery of the hammer case; A plurality of lights disposed on at least a portion of a front surface of the light substrate; A light cover having a passage portion through which illumination light emitted from a light emission surface of the light passes, at least a portion of which is disposed forward of the light substrate, The hammer case has a first cylindrical portion arranged around the striking mechanism, and a second cylindrical portion arranged forward of the first cylindrical portion and having an outer diameter smaller than an outer diameter of the first cylindrical portion, the light cover is disposed around the second cylindrical portion, The second cylindrical portion has a corner portion protruding radially outward, The light cover has a recess in which the corner portion is disposed. Impact tool.

2. A motor; A striking mechanism driven by the motor; an anvil to which a tip tool is attached and which is struck in a rotational direction by the striking mechanism; A hammer case that houses the impact mechanism; A light board disposed around at least a portion of the periphery of the hammer case; A plurality of lights disposed on at least a portion of a front surface of the light substrate; A light cover having a passage portion through which illumination light emitted from a light emission surface of the light passes, at least a portion of which is disposed forward of the light substrate, The hammer case has a first cylindrical portion arranged around the striking mechanism, and a second cylindrical portion arranged forward of the first cylindrical portion and having an outer diameter smaller than an outer diameter of the first cylindrical portion, the light cover is disposed around the second cylindrical portion, a fixing member supported by the second cylindrical portion and in contact with at least a portion of the front surface of the light cover; Impact tool.

3. The fixing member includes at least one of a ring spring, a bumper, a metal sleeve, and a circlip, the ring spring being disposed in a support groove provided in the second cylindrical portion.

3. An impact tool according to claim 2.

4. The light cover contacts the front and side surfaces of the light substrate. An impact tool according to any one of claims 1 to 3.

5. the light cover has a light transmitting portion facing the light exit surface, The passing portion includes the light transmitting portion. An impact tool according to any one of claims 1 to 4.

6. The light transmitting portion diffuses the illumination light emitted from the light exit surface.

6. An impact tool according to claim 5.

7. The light cover has a light-shielding portion facing the front surface of the light board. An impact tool according to any one of claims 1 to 6.

8. The light cover has a substrate groove, The light substrate is disposed in the substrate groove so that the light exit surface faces forward. An impact tool according to any one of the preceding claims.

9. An adhesive resin portion is provided to fix the light board and the light cover, At least a part of the adhesive resin part covers the rear surface and the side surface of the light substrate.

9. An impact tool according to claim 8.

10. a bearing for supporting the anvil; The second cylindrical portion is disposed around the bearing. An impact tool according to any one of the preceding claims.

11. a hammer case cover covering at least a part of an outer surface of the first cylindrical portion; At least a portion of the light cover contacts the hammer case cover. An impact tool according to any one of the preceding claims.

12. A front end portion of the hammer case cover is disposed radially inward from a rear end portion of the light cover. An impact tool according to claim 11.

13. a housing that accommodates the motor and at least a portion of the first cylindrical portion, The hammer case cover is fixed to the housing. An impact tool according to claim 11 or 12.

14. The hammer case cover has a hook portion that can be hung on the housing.

14. An impact tool according to claim 13.

15. The housing includes a left housing and a right housing, At least a portion of the hammer case cover is sandwiched between the left housing and the right housing. An impact tool according to claim 13 or 14.

16. A buffer member is provided between the light cover and the hammer case. An impact tool according to any one of the preceding claims.

17. The light is provided in plurality around the rotation axis of the anvil. An impact tool according to any one of the preceding claims.

18. A motor; a hammer rotated by the motor; an anvil, at least a portion of which is disposed forward of the hammer and struck in a rotational direction by the hammer; A bearing that rotatably supports the anvil; a hammer case having a hammer accommodating portion for accommodating the hammer and a bearing support portion for supporting the bearing; a plurality of lights for illuminating the anvil and the area surrounding the anvil; a light board on which the plurality of lights are mounted and which is disposed radially outside the bearing support portion; A hammer case cover that covers at least a part of an outer surface of the hammer housing portion; A light cover is disposed forward of the hammer case cover and at least a portion of the light cover is disposed forward of the light board and the light, The light cover is disposed around the bearing support portion, The bearing support portion has a corner portion protruding radially outward, The light cover has a recess in which the corner portion is disposed. Impact tool.

19. A motor; a hammer rotated by the motor; an anvil, at least a portion of which is disposed forward of the hammer and struck in a rotational direction by the hammer; A bearing that rotatably supports the anvil; a hammer case having a hammer accommodating portion for accommodating the hammer and a bearing support portion for supporting the bearing; a plurality of lights for illuminating the anvil and the area surrounding the anvil; a light board on which the plurality of lights are mounted and which is disposed radially outside the bearing support portion; A hammer case cover that covers at least a part of an outer surface of the hammer housing portion; A light cover is disposed forward of the hammer case cover and at least a portion of the light cover is disposed forward of the light board and the light, The light cover is disposed around the bearing support portion, a fixing member supported by the bearing support portion and in contact with at least a portion of the front surface of the light cover; Impact tool.

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