Electric tool

Abstract

To inhibit increase in the size of an electric tool.SOLUTION: An electric tool includes: a motor having a rotor which rotates around a motor rotation axis extending in a front-back direction; an output part which is disposed in front of the motor and rotates based on rotational force of the rotor; a housing having a motor housing part which houses the motor, a grip part extending downward from the motor housing part, and a battery holding part connected to a lower end part of the grip part; a control circuit board which is housed in the grip part and controls the motor; and a panel which is disposed at a rear part of the battery holding part and operated to change a control method of the motor.SELECTED DRAWING: Figure 20

Description

[Technical field]

[0001] The technology disclosed in this specification relates to power tools. [Background technology]

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

[0003] [Patent Document 1] JP 2023-020813 A Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in this specification aims to prevent the power tool from becoming larger. [Means for solving the problem]

[0005] This specification discloses an electric power tool, which may include a motor having a rotor that rotates around a motor rotation axis extending in a front-rear direction, an output unit that is disposed forward of the motor and rotates based on the rotational force of the rotor, a housing that includes a motor housing portion that houses the motor, a grip portion that extends downward from the motor housing portion, and a battery holding portion that is connected to a lower end of the grip portion, a control circuit board that is contained in the grip portion and controls the motor, and a panel that is disposed behind the battery holding portion and is operated to change a control method of the motor. Effect of the Invention

[0006] According to the technique disclosed in this specification, an increase in the size of the power tool is suppressed. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a front perspective view showing a power tool according to an embodiment. [Diagram 2] FIG. 2 is a rear perspective view showing the power tool according to the embodiment. [Diagram 3] FIG. 3 is a rear view showing the power tool according to the embodiment. [Figure 4] FIG. 4 is a top view showing the power tool according to the embodiment. [Diagram 5] FIG. 5 is a right side view showing the power tool according to the embodiment. [Figure 6] FIG. 6 is a vertical cross-sectional view showing the power tool according to the embodiment. [Figure 7] FIG. 7 is a vertical cross-sectional view showing an upper portion of the power tool according to the embodiment. [Figure 8] FIG. 8 is a cross-sectional view showing an upper portion of the power tool according to the embodiment. [Figure 9] FIG. 9 is a vertical cross-sectional view showing a lower part of the power tool according to the embodiment. [Figure 10] FIG. 10 is a rear view showing the lower part of the power tool according to the embodiment. [Figure 11] FIG. 11 is a rear perspective view showing the lower part of the power tool according to the embodiment. [Figure 12] FIG. 12 is a cross-sectional view showing the operation display unit of the power tool according to the embodiment. [Figure 13] FIG. 13 is a block diagram showing the power tool according to the embodiment. [Figure 14] FIG. 14 is a vertical cross-sectional view showing a lower part of the power tool according to the embodiment. [Figure 15] FIG. 15 is a vertical cross-sectional view showing a lower part of the power tool according to the embodiment. [Figure 16] FIG. 16 is a diagram showing a modified example of the power tool according to the embodiment. [Figure 17] FIG. 17 is an exploded perspective view showing a part of the power tool according to the embodiment. [Figure 18] FIG. 18 is a cross-sectional view showing a part of a modified example of the power tool according to the embodiment. [Figure 19] FIG. 19 is an exploded perspective view showing a part of a modified example of the power tool according to the embodiment. [Figure 20] FIG. 20 is a vertical cross-sectional view showing a lower part of the power tool according to the embodiment. [Figure 21] FIG. 21 is a vertical cross-sectional view showing the power tool according to the embodiment. [Figure 22] FIG. 22 is a perspective view showing a modification of the control circuit board and the trigger lever according to the embodiment. [Figure 23] FIG. 23 is a perspective view showing the lower part of the power tool according to the embodiment, seen from the rear. [Figure 24] FIG. 24 is a vertical cross-sectional view showing the power tool according to the embodiment. [Diagram 25] FIG. 25 is a rear view showing the power tool according to the embodiment. [Figure 26] FIG. 26 is an exploded perspective view of the power tool according to the embodiment, seen from the front. [Figure 27] FIG. 27 is a vertical cross-sectional view showing a lower part of the power tool according to the embodiment. [Figure 28] FIG. 28 is a perspective view showing a control circuit board according to the embodiment. [Figure 29] FIG. 29 is a rear perspective view showing the lower part of the power tool according to the embodiment. [Diagram 30] FIG. 30 is a rear perspective view showing the lower part of the power tool according to the embodiment. [Diagram 31] FIG. 31 is a rear perspective view showing the lower part of the power tool according to the embodiment. [Diagram 32] FIG. 32 is a rear perspective view showing the lower part of the power tool according to the embodiment. [Diagram 33] FIG. 33 is a rear view showing the power tool according to the embodiment. [Diagram 34] FIG. 34 is a block diagram showing a power tool according to an embodiment. [Diagram 35] FIG. 35 is a right side view showing the power tool according to the embodiment. [Diagram 36]FIG. 36 is a diagram illustrating a control circuit board and a panel according to the embodiment. [Figure 37] FIG. 37 is a rear view showing the power tool according to the embodiment. [Figure 38] FIG. 38 is a rear perspective view showing the power tool according to the embodiment. [Figure 39] FIG. 39 is a rear perspective view showing the power tool according to the embodiment. [Diagram 40] FIG. 40 is a front perspective view showing the power tool according to the embodiment. [Diagram 41] FIG. 41 is a side view diagrammatically illustrating the power tool according to the embodiment. [Diagram 42] FIG. 42 is a diagram illustrating a part of the power tool according to the embodiment. [Diagram 43] FIG. 43 is a rear perspective view showing a part of the power tool according to the embodiment. [Diagram 44] FIG. 44 is a vertical cross-sectional view showing a part of the power tool according to the embodiment. [Diagram 45] FIG. 45 is a diagram showing a control circuit board disposed in the internal space of the motor accommodating portion according to the embodiment. [Figure 46] FIG. 46 is a diagram showing a control circuit board disposed in the internal space of the grip part according to the embodiment. [Figure 47] FIG. 47 is a diagram showing a control circuit board disposed in the internal space of the battery holding portion according to the embodiment. [Figure 48] FIG. 48 is a diagram showing a control circuit board disposed in the internal space of the support part according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In one or more embodiments, the power tool may include a motor having a rotor that rotates around a motor rotation axis extending in a fore-and-aft direction, an output section that is arranged forward of the motor and rotates based on the rotational force of the rotor, a housing having a motor accommodating section that accommodates the motor, a grip section that extends downward from the motor accommodating section, and a battery holding section connected to a lower end of the grip section, a control circuit board that is accommodated in the grip section and controls the motor, and a panel that is arranged behind the battery holding section and is operated to change the control method of the motor.

[0009] In the above configuration, the control circuit board is housed in the grip portion, which prevents the power tool from becoming large in size.

[0010] In one or more embodiments, the power tool may include a plastic portion that supports the panel.

[0011] In the above configuration, the panel is properly supported.

[0012] In one or more embodiments, the panel may be in contact with the plastic portion.

[0013] In the above configuration, since the panel is directly supported by the resin portion, the number of parts of the power tool is reduced.

[0014] In one or more embodiments, the panel may be secured to a plastic section.

[0015] In the above configuration, the relative movement between the panel and the resin portion is suppressed.

[0016] In one or more embodiments, the panel may face the circuit board, and the resin portion may hold the circuit board.

[0017] In the above configuration, the resin portion supports not only the panel but also the circuit board, thereby reducing the number of parts of the power tool.

[0018] In one or more embodiments, the panel may have an elastically deformable portion, and the circuit board may support a switch element that is operated by pressing the elastically deformable portion.

[0019] In the above configuration, the elastically deformable portion is pressed to operate the switch element, thereby changing the control method of the motor.

[0020] In one or more embodiments, the panel may have a light-transmitting portion, and the circuit board may support a light-emitting element that irradiates the light-transmitting portion.

[0021] In the above configuration, the light emitting state of the light emitting element is changed in accordance with the change in the motor control method, so that the worker can visually recognize that the motor control method has been changed.

[0022] In one or more embodiments, the housing may include a left housing and a right housing secured to the left housing by a screw.

[0023] With the above configuration, the housing is easy to assemble.

[0024] In one or more embodiments, the housing may have a motor housing portion that houses the motor, a grip portion that extends downward from the motor housing portion, and a battery holding portion that is connected to a lower end of the grip portion. The battery attachment portion may be disposed below the battery holding portion. The panel may be disposed in the battery holding portion.

[0025] With the above configuration, it is easy for the operator to operate the panel.

[0026] In one or more embodiments, the power tool may include a trigger lever provided at a front portion of the grip portion and operated to activate the motor. The panel may be disposed at a rear portion of the battery holder.

[0027] In the above configuration, the panel is disposed at the rear of the battery holding part, so that the operator can operate and view the panel while keeping the front of the power tool facing the work target.

[0028] In one or more embodiments, the panel may be disposed in a recess in the battery holder.

[0029] In the above configuration, the panel does not protrude from the surface of the battery holding portion, making it easier for the operator to handle the power tool.

[0030] In one or more embodiments, the center of the panel and the center of the battery holder may coincide in the left-right direction.

[0031] The above-mentioned configuration improves the weight balance of the power tool in the left-right direction, and also improves the operability and visibility of the panel.

[0032] In one or more embodiments, the panel may be located rearward of the rear end of the grip portion.

[0033] The above-described configuration improves the weight balance of the power tool in the front-rear direction, and also improves the operability and visibility of the panel.

[0034] In one or more embodiments, the panel may be located rearward of the rear end of the motor housing.

[0035] The above-described configuration improves the weight balance of the power tool in the front-rear direction, and also improves the operability and visibility of the panel.

[0036] In one or more embodiments, the control circuit board may be housed in the battery holder.

[0037] In the above-described configuration, the distance between the panel and the control circuit board is shortened, which prevents the connection structure between the panel and the control circuit board from becoming large and complicated.

[0038] In one or more embodiments, the rear end of the control circuit board may be located rearward of the rear end of the grip portion.

[0039] With the above-described configuration, the weight balance of the power tool in the front-rear direction is improved.

[0040] In one or more embodiments, the panel may be located rearward of the control circuit board.

[0041] In the above-described configuration, the panel and the control circuit board do not overlap, so that an increase in size of the battery holding portion is suppressed, and the weight balance of the power tool is improved.

[0042] In one or more embodiments, the surface of the panel may slope downwardly toward the rear.

[0043] The above configuration improves the operability and visibility of the panel.

[0044] In one or more embodiments, the left-to-right dimension of the panel may be greater than the top-to-bottom dimension of the panel.

[0045] In the above configuration, the panel is long in the left-right direction, so that the operability and visibility of the operation display unit are improved.

[0046] In one or more embodiments, the surface of the circuit board may be sloped downward toward the rear.

[0047] With the above-described configuration, the size of the power tool is prevented from increasing, and the operability and visibility of the panel are improved.

[0048] In one or more embodiments, the surface of the control circuit board may be parallel to the motor axis of rotation.

[0049] In the above configuration, the circuit board and the control circuit board are arranged to face in different directions, which prevents the power tool from becoming large.

[0050] In one or more embodiments, the electric power tool may include a motor having a rotor that rotates around a motor rotation axis extending in the front-rear direction, a speed reduction mechanism that reduces the speed of rotation from the motor, an output unit that is driven by the output from the speed reduction mechanism, a housing having a motor storage unit that stores the motor, a grip unit that extends downward from the motor storage unit, a support unit in front of the grip unit, and a battery holding unit that is disposed below the support unit and to which a battery pack is slidably connected, a control circuit board that is contained in the housing and controls the motor, and a panel that is disposed at least one of a lower part of the grip unit and a rear part of the battery holding unit and that is operated to change a method of controlling the motor. The panel may be disposed only below the grip unit or only at the rear part of the battery holding unit.

[0051] Hereinafter, an 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 power tool 1. The power tool 1 has a motor 6 as a power source.

[0052] In the embodiment, the direction parallel to the motor rotation axis AX of the motor 6 is referred to as the axial direction, the direction circumferentially around the motor rotation axis AX is referred to as the circumferential direction or rotation direction, and the radial direction of the motor rotation axis AX is referred to as the radial direction.

[0053] The motor rotation shaft 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 motor rotation shaft AX is appropriately referred to as the radially inner side, and a position farther from or away from the motor rotation shaft AX is appropriately referred to as the radially outer side.

[0054] [First embodiment] A first embodiment will be described.

[0055] <Power tools> FIG. 1 is a front perspective view of the power tool 1 according to the embodiment. FIG. 2 is a rear perspective view of the power tool 1 according to the embodiment. FIG. 3 is a rear view of the power tool 1 according to the embodiment. FIG. 4 is a top view of the power tool 1 according to the embodiment. FIG. 5 is a right side view of the power tool 1 according to the embodiment. FIG. 6 is a vertical cross-sectional view of the power tool 1 according to the embodiment. FIG. 7 is a vertical cross-sectional view of the upper part of the power tool 1 according to the embodiment. FIG. 8 is a cross-sectional view of the upper part of the power tool 1 according to the embodiment.

[0056] In the embodiment, the power tool 1 is an impact driver, which is a type of screw tightening tool. The power tool 1 includes a housing 2, a rear cover 3, a hammer case 4, a hammer case cover 5A, a bumper 5B, a motor 6, a reduction mechanism 7, a spindle 8, a striking mechanism 9, an anvil 10, a tool holding mechanism 11, a fan 12, a battery mounting section 13, a trigger lever 14, a forward / reverse rotation switching lever 15, an operation display section 16, a mode switching switch 17, a light assembly 18, and a control circuit board 19.

[0057] 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.

[0058] The housing 2 has a motor accommodating portion 21, a grip portion 22, and a battery holding portion 23.

[0059] The motor accommodating portion 21 is cylindrical and accommodates the motor 6. The motor accommodating portion 21 accommodates at least a portion of the hammer case 4.

[0060] The grip portion 22 extends downward from the motor housing portion 21. The trigger lever 14 is provided at the front of the upper portion of the grip portion 22. The grip portion 22 is held by an operator.

[0061] The battery holding portion 23 is connected to a lower end portion of the grip portion 22. The outer dimensions of the battery holding portion 23 are larger than the outer dimensions of the grip portion 22 in both the front-rear direction and the left-right direction.

[0062] 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. The rear cover 3 is fixed to the rear end portion of the motor accommodating portion 21 with two screws 3S.

[0063] The motor accommodating portion 21 has an intake port 20A. The rear cover 3 has an exhaust port 20B. Air in the external space of the housing 2 flows into the internal space of the housing 2 through the intake port 20A. Air in the internal space of the housing 2 flows out to the external space of the housing 2 through the exhaust port 20B.

[0064] 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 of the motor accommodating section 21. The bearing box 24 is fixed to the rear 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. At least a portion of the hammer case 4 is 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.

[0065] The hammer case 4 houses the reduction mechanism 7, the spindle 8, and the striking mechanism 9. The hammer case 4 houses at least a portion of 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.

[0066] The hammer case cover 5A covers at least a portion of the surface of the hammer case 4. The hammer case cover 5A protects the hammer case 4. The hammer case cover 5A suppresses contact between the hammer case 4 and objects around the hammer case 4.

[0067] The bumper 5B is disposed in front of the hammer case 4. The bumper 5B is annular. The bumper 5B suppresses contact between the hammer case 4 and objects around the hammer case 4. The bumper 5B reduces the impact when the hammer case 4 comes into contact with an object.

[0068] The motor 6 is a power source of the power 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 accommodating 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 motor rotation axis AX extending in the front-rear direction.

[0069] The stator 26 includes a stator core 28 , a front insulator 29 , a rear insulator 30 , and a coil 31 .

[0070] 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.

[0071] 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.

[0072] 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. The coils 31 are connected to the control circuit board 19 via lead wires (not shown).

[0073] The rotor 27 rotates about a motor rotation axis AX. The rotor 27 has a rotor core portion 32, a rotor shaft portion 33, a rotor magnet 34, and a sensor magnet 35.

[0074] The rotor core portion 32 and the rotor shaft portion 33 are each made of steel. The rotor shaft portion 33 protrudes in the front-rear direction from an end face of the rotor core portion 32. The rotor shaft portion 33 includes a front shaft portion 33F that protrudes forward from the front end face of the rotor core portion 32 and a rear shaft portion 33R that protrudes rearward from the rear end face of the rotor core portion 32.

[0075] The rotor magnet 34 is fixed to the rotor core portion 32. The rotor magnet 34 is cylindrical. The rotor magnet 34 is disposed around the rotor core portion 32.

[0076] The sensor magnet 35 is fixed to the rotor core portion 32. The sensor magnet 35 is annular. The sensor magnet 35 is disposed on the front end surface of the rotor core portion 32 and the front end surface of the rotor magnet .

[0077] 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.

[0078] The rotor shaft portion 33 is rotatably supported by a rotor bearing 39. The rotor bearing 39 includes a front rotor bearing 39F that rotatably supports the front shaft portion 33F, and a rear rotor bearing 39R that rotatably supports the rear shaft portion 33R.

[0079] 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 portion 33 is disposed in the internal space of the hammer case 4 through an opening in the bearing box 24.

[0080] A pinion gear 41 is formed on the front end of the rotor shaft portion 33. The pinion gear 41 is connected to at least a part of the reduction mechanism 7. The rotor shaft portion 33 is connected to the reduction mechanism 7 via the pinion gear 41.

[0081] The reduction mechanism 7 is disposed forward of the motor 6. The reduction mechanism 7 connects the rotor shaft portion 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 portion 33. The reduction mechanism 7 includes a planetary gear mechanism.

[0082] The reduction mechanism 7 has a plurality of gears. The gears of the reduction mechanism 7 are driven by a rotor 27.

[0083] 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 each housed in the hammer case 4. 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.

[0084] When the rotor shaft portion 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 portion 33.

[0085] 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 disposed rearward of the anvil 10. The spindle 8 is rotated by the rotor 27. The spindle 8 rotates by the rotational force of the rotor 27 transmitted by the reduction mechanism 7. The spindle 8 transmits the rotational force of the motor 6 to the anvil 10.

[0086] 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 motor rotation axis AX of the motor 6 coincide with each other. The spindle 8 rotates around the motor rotation axis AX. The spindle 8 is rotatably supported by a spindle bearing 44. A protrusion 8C is provided at the rear end of the spindle 8. The protrusion 8C protrudes rearward from the flange portion 8A. The protrusion 8C is disposed so as to surround the spindle bearing 44.

[0087] 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 protrusion 24B that protrudes forward from the front surface of the bearing box 24. The spindle bearing 44 is disposed around the protrusion 24B.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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 motor rotation axis AX of the motor 6 coincide with each other. The hammer 47 rotates around the motor rotation axis AX.

[0092] 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.

[0093] 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.

[0094] The anvil 10 is disposed forward of the motor 6. The anvil 10 is an output part of the power tool 1 that rotates based on the rotational force of the rotor 27. 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.

[0095] The anvil 10 has an anvil recess 10B. The anvil recess 10B is provided at the rear end of the anvil 10. The anvil recess 10B is recessed forward from the rear end of the anvil 10. The spindle 8 is disposed behind the anvil 10. The front end of the spindle shaft portion 8B is disposed in the anvil recess 10B.

[0096] The anvil 10 has a rod-shaped anvil shank 10C and an anvil protrusion 10D. The tool hole 10A is provided at the front end of the anvil shank 10C. The tool tip is attached to the anvil shank 10C. The anvil protrusion 10D is provided at the rear end of the anvil 10. The anvil protrusion 10D protrudes radially outward from the rear end of the anvil shank 10C.

[0097] The anvil 10 is rotatably supported by the anvil 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 motor rotation axis AX of the motor 6 are coincident. The anvil 10 rotates around the motor rotation axis AX. The anvil bearing 46 is disposed inside the hammer case 4. The anvil bearing 46 is held by the hammer case 4. In the embodiment, two anvil bearings 46 are disposed in the axial direction. The anvil bearing 46 rotatably supports the front part of the anvil shaft portion 10C. An O-ring 46A is disposed between the anvil bearing 46 and the anvil shaft portion 10C.

[0098] At least a portion of the hammer 47 is capable of contacting the anvil protrusion 10D. A hammer protrusion 47D that protrudes forward is provided at the front of the hammer 47. The hammer protrusion 47D and the anvil protrusion 10D are capable of contacting each other. When the motor 6 is driven while the hammer 47 and the anvil protrusion 10D are in contact with each other, the anvil 10 rotates together with the hammer 47 and the spindle 8.

[0099] 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 10D is released.

[0100] 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 10D while rotating. As a result, the anvil protrusion 10D is struck in the rotational direction by the hammer protrusion 47D of 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 around the motor rotation axis AX with high torque.

[0101] The tool holding mechanism 11 is disposed around the front part of the anvil 10. The tool holding mechanism 11 holds the tool bit inserted into the tool hole 10A.

[0102] 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 of the rear shaft portion 33R 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 portion 33 as the rotor shaft portion 33 rotates. As the fan 12 rotates, air in the external space of the housing 2 flows into the internal space of the housing 2 through the intake port 20A. 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. As the fan 12 rotates, 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 20B.

[0103] The battery mounting section 13 is disposed at the lower part of the battery holding 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 holding section 23 holds the battery pack 25 via the battery mounting section 13. The battery pack 25 is attached to the battery holding section 23 via the battery mounting section 13. The battery pack 25 is detachable from the battery mounting section 13. The battery pack 25 is mounted to the battery mounting section 13 by being inserted into the battery mounting section 13 from the front of the battery holding section 23. The battery pack 25 is removed from the battery mounting section 13 by being removed forward 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 supplies power to the power tool 1. The battery pack 25 supplies power to at least the motor 6. The motor 6 is driven based on the power supplied from the battery pack 25. The operation display unit 16 is operated by the power supplied from the battery pack 25. The control circuit board 19 is operated by the power supplied from the battery pack 25.

[0104] The battery mounting portion 13 includes a main body side terminal 13A and a terminal holding portion 13B. The main body side terminal 13A includes a main body side power supply terminal connected to a power supply terminal of the battery pack 25, and a main body side communication terminal connected to a communication terminal of the battery pack 25. Power from the battery pack 25 is supplied to the main body side terminal 13A. The power from the battery pack 25 supplied to the main body side terminal 13A is supplied to the motor 6 via the control circuit board 19. The terminal holding portion 13B is made of synthetic resin. The terminal holding portion 13B is fixed to the battery holding portion 23. The terminal holding portion 13B is sandwiched between the left housing 2L and the right housing 2R.

[0105] The trigger lever 14 is provided at the front of the upper part of the grip portion 22. The trigger lever 14 is operated by an operator to start the motor 6. By operating the trigger lever 14, the motor 6 is switched between being driven and being stopped.

[0106] 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.

[0107] The operation display unit 16 is disposed at the rear of the battery holding unit 23. The operation display unit 16 is operated by an operator to change the operation mode of the motor 6. No operation display unit is provided at the front, left, or right part of the battery holding unit 23.

[0108] The mode changeover switch 17 is provided on the upper part of the trigger lever 14. The mode changeover switch 17 is operated by an operator to change the operation mode of the motor 6.

[0109] The light assembly 18 emits illumination light. The light assembly 18 illuminates the anvil 10 and the periphery of the anvil 10 with illumination light. The light assembly 18 illuminates the front of the anvil 10 with illumination light. The light assembly 18 also illuminates the tool attachment attached to the anvil 10 and the periphery of the tool with illumination light. In the embodiment, the light assemblies 18 are disposed on the left and right parts of the hammer case 4, respectively.

[0110] The control circuit board 19 functions as a controller of the power tool 1 that controls at least the motor 6. The control circuit board 19 outputs a control signal that controls the motor 6. The control circuit board 19 includes a printed circuit board (PCB) on which a plurality of electronic components are mounted. The electronic components are mounted on a surface 19S of the control circuit board 19. The surface 19S of the control circuit board 19 faces upward.

[0111] Examples of electronic components mounted on the printed circuit board include a processor such as a CPU (Central Processing Unit), a non-volatile memory such as a ROM (Read Only Memory) or storage, a volatile memory such as a RAM (Random Access Memory), a transistor, and a resistor. The control circuit board 19 is housed in the battery holding portion 23 while being held by the resin portion 60. The control circuit board 19 is disposed inside the battery holding portion 23.

[0112] The control circuit board 19 switches the operation mode of the motor 6 based on the work content of the power tool 1. The operation mode of the motor 6 refers to a control method or control pattern of the motor 6. The operation mode of the motor 6 is changed by operating at least one of the operation display unit 16 and the mode change switch 17.

[0113] As shown in FIG. 5, in the front-to-rear direction, a first distance G1 between the front end 22A of the lower end of the grip portion 22 and the front end 23A of the battery holding portion 23 is shorter than or equal to a second distance G2 between the rear end 22B of the lower end of the grip portion 22 and the rear end 23B of the battery holding portion 23.

[0114] As shown in FIG. 6, a rear end portion 19B of the control circuit board 19 is disposed rearward of a rear end portion 22B of the grip portion 22 in the front-rear direction.

[0115] As described above, electronic components are mounted on the surface 19S of the control circuit board 19. The surface 19S of the control circuit board 19 faces upward. The surface 19S of the control circuit board 19 is parallel to the motor rotation axis AX.

[0116] <Operation display section> Fig. 9 is a vertical cross-sectional view showing the lower part of the power tool 1 according to the embodiment. Fig. 10 is a rear view showing the lower part of the power tool 1 according to the embodiment. Fig. 11 is a rear perspective view showing the lower part of the power tool 1 according to the embodiment. Fig. 12 is a cross-sectional view showing the operation display unit 16 of the power tool 1 according to the embodiment, which corresponds to the cross-sectional view taken along the line A-A in Fig. 10.

[0117] The operation display unit 16 is disposed at the rear of the battery holding unit 23. The operation display unit 16 is disposed in a recess 23R provided in the battery holding unit 23. The operation display unit 16 is disposed behind the control circuit board 19. The operation display unit 16 is connected to the control circuit board 19.

[0118] The operation display unit 16 includes a circuit board 51 , a switch element 52 , a light-emitting element 53 , and a panel 55 .

[0119] The circuit board 51 includes a printed circuit board (PCB) on which a plurality of electronic components are mounted. The electronic components are mounted on a surface 51S of the circuit board 51. The surface 51S of the circuit board 51 faces upward and rearward. The surface 51S of the circuit board 51 is inclined downward toward the rear.

[0120] The switch element 52 and the light emitting element 53 are each supported by the circuit board 51. The switch element 52 and the light emitting element 53 are each mounted on the circuit board 51. The switch element 52 and the light emitting element 53 are each mounted on a surface 51S of the circuit board 51.

[0121] The panel 55 is operated by an operator to change an operation mode indicating a control method or control pattern of the motor 6. The panel 55 is a plate-shaped member made of synthetic resin. The panel 55 is disposed at the rear of the battery holding portion 23. The panel 55 is disposed in a recess 23R provided in the battery holding portion 23. The panel 55 is disposed behind the control circuit board 19.

[0122] The panel 55 faces the circuit board 51. The panel 55 is disposed so as to cover each of the switch elements 52 and the light-emitting elements 53. The surface 16S of the operation and display unit 16 includes a surface 55S of the panel 55. The surface 16S of the operation and display unit 16 faces upward and rearward. The surface 55S of the panel 55 is inclined downward toward the rear.

[0123] The switch element 52 is operated via a panel 55. The panel 55 has an operating section 56 disposed directly above the switch element 52. The operating section 56 includes an elastically deformable section provided on at least a part of the panel 55. When the operating section 56 of the panel 55 is pressed by an operator, the switch element 52 is operated via the panel 55.

[0124] A plurality of light-emitting elements 53 are arranged in the left-right direction. In the embodiment, five light-emitting elements 53 are arranged in the left-right direction. An example of the light-emitting element 53 is a light-emitting diode (LED). Light emitted from the light-emitting element 53 is emitted to the outside of the battery holding portion 23 via the panel 55. The panel 55 includes a display unit 57 arranged directly above the light-emitting element 53. The display unit 57 includes a light-transmitting portion provided in at least a part of the panel 55. The light-emitting element 53 irradiates light to the display unit 57. An operator can visually check the light-emitting state of the light-emitting element 53 via the display unit 57.

[0125] In the embodiment, the switch element 52 includes a first switch element 52A and a second switch element 52B. The operation unit 56 includes a first operation unit 56A disposed directly above the first switch element 52A and a second operation unit 56B disposed directly above the second switch element 52B.

[0126] By operating the first operating portion 56A, the first switch element 52A is operated via the first operating portion 56A. By operating the second operating portion 56B, the second switch element 52B is operated via the second operating portion 56B. The operator can operate the switch element 52 while gripping the grip portion 22.

[0127] In the embodiment, five display units 57 are arranged in the left-right direction so as to correspond to the five light-emitting elements 53, respectively. Light emitted from the light-emitting elements 53 passes through the display units 57, which are light-transmitting units. An operator can visually recognize the light-emitting state of the light-emitting elements 53 through the display units 57.

[0128] 3 and 10, the center of the operation display unit 16 coincides with the center of the battery holding portion 23 in the left-right direction. The center of the operation display unit 16 in the left-right direction includes the center of the panel 55 in the left-right direction.

[0129] The left-right dimension of operation display unit 16 is larger than the up-down dimension of operation display unit 16. That is, operation display unit 16 is long in the left-right direction. The left-right dimension of operation display unit 16 includes the left-right dimension of panel 55. The up-down dimension of operation display unit 16 includes the up-down dimension of panel 55.

[0130] In the embodiment, the first operation unit 56A is disposed on the left side of the panel 55. The second operation unit 56B is disposed on the right side of the panel 55. In the left-right direction, the display unit 57 is disposed between the first operation unit 56A and the second operation unit 56B.

[0131] 5 and 6, in the front-rear direction, the panel 55 is disposed rearward of the rear end 22B of the grip portion 22. In the front-rear direction, the panel 55 is disposed rearward of the rear end 21B of the motor accommodating portion 21. In the front-rear direction, the panel 55 is disposed rearward of the rear cover 3.

[0132] The resin part 60 supports the panel 55. The resin part 60 holds the control circuit board 19. The resin part 60 holds the circuit board 51. The panel 55 contacts the rear part of the resin part 60. The panel 55 is fixed to the rear part of the resin part 60. The rear part of the resin part 60 is disposed in a recess 23R provided in the battery holding part 23.

[0133] The resin part 60 is fixed to the battery holding part 23. The resin part 60 is sandwiched between the left housing 2L and the right housing 2R. The panel 55, the control circuit board 19, and the circuit board 51 are each fixed to the battery holding part 23 via the resin part 60.

[0134] The control circuit board 19, the circuit board 51, the switch element 52, the light emitting element 53, and the resin part 60 are each disposed inside the battery holding part .

[0135] As described above, the terminal holding portion 13B is made of synthetic resin. The terminal holding portion 13B and the resin portion 60 are separate bodies. The terminal holding portion 13B and the resin portion 60 may be integral with each other.

[0136] In the embodiment, the operation mode of the motor 6 is switched by operating the switch element 52 via the operation unit 56. In the embodiment, the operation modes of the motor 6 include an impact force mode, which is a type of general-purpose mode, and a dedicated mode that is dedicated based on the work object. In the embodiment, the impact force mode is switched by operating the first switch element 52A. The dedicated mode is switched by operating the second switch element 52B.

[0137] As an example, the striking force modes include a fastest mode, a strong mode, a medium mode, and a weak mode. The dedicated modes include a wood mode, a texture mode, and a bolt mode. In the operation display unit 16, an area is provided below the display unit 57 in which characters regarding the contents to be displayed by the light emitting element 53 are displayed.

[0138] When the switch element 52 is operated via the operation unit 56, the circuit board 51 generates an operation signal. The circuit board 51 and the control circuit board 19 are connected via a lead wire (not shown). The operation signal generated in the circuit board 51 is transmitted to the control circuit board 19 via the lead wire. The control circuit board 19 sets the operation mode of the motor 6 based on the operation signal transmitted from the circuit board 51.

[0139] As shown in FIG. 13, the control circuit board 19 has a storage unit 191, a command output unit 192, a motor control unit 193, and a display control unit 194.

[0140] The storage unit 191 stores a plurality of operation modes of the motor 6 (fastest mode, strong mode, medium mode, weak mode, wood mode, texture mode, and bolt mode).

[0141] The command output unit 192 outputs a mode command for setting an operation mode when the operation unit 56 of the operation display unit 16 is operated. That is, the command output unit 192 outputs a mode command for setting the operation mode of the motor 6 based on an operation signal from the circuit board 51.

[0142] The motor control unit 193 outputs a motor control signal for controlling the motor 6 based on the mode command output from the command output unit 192. The motor control unit 193 controls the motor 6 based on the operation mode set by operation of the operation unit 56.

[0143] The display control unit 194 outputs a display control signal for controlling the display unit 57 (light-emitting elements 53) of the operation display unit 16 based on the mode command output from the command output unit 192. The display control signal output from the display control unit 194 is transmitted to the circuit board 51 via a lead wire. The circuit board 51 controls the display unit 57 based on the display control signal from the display control unit 194. The circuit board 51 operates each of the multiple light-emitting elements 53 in a light-emitting pattern corresponding to the set operation mode.

[0144] <Operation of impact tool> Next, the operation of the power tool 1 will be described. For example, when performing a screw tightening operation on a work object, 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 tool holding mechanism 11. After the tip tool is attached to the anvil 10, the operator holds the grip portion 22 with, for example, the right hand and pulls the trigger lever 14 with the index finger of the right hand. When the trigger lever 14 is pulled, power is supplied from the battery pack 25 to the motor 6, the motor 6 is started, and at the same time, the light assembly 18 is turned on. When the motor 6 is started, the rotor shaft portion 33 of the rotor 27 rotates. When the rotor shaft portion 33 rotates, the rotational force of the rotor shaft portion 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 while meshing 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 portion 33.

[0145] When the spindle 8 rotates while the hammer 47 and the anvil protrusion 10D 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.

[0146] 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 10D. 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 motor rotation shaft AX with high torque. Therefore, the screw is tightened to the work object with high torque.

[0147] When the operator wishes to change the operation mode of the motor 6 during screw tightening work, the operator can operate the operation unit 56 of the operation display unit 16 while facing the front of the power tool 1 toward the work target. That is, while holding the grip portion 22, for example, with the right hand, the operator can operate the operation unit 56 of the operation display unit 16 with the left hand without pulling the power tool 1 back to the operator while maintaining a working posture for using the power tool 1. Furthermore, when the operation mode of the motor 6 is changed, the display pattern of the display unit 57 (the light emission pattern of the light emitting element 53) is changed. The operator can visually check the display unit 57 of the operation display unit 16 while maintaining a working posture for using the power tool 1 without pulling the power tool 1 back to the operator.

[0148] <Effects> As described above, in the embodiment, the power tool 1 includes the motor 6, the control circuit board 19 that controls the motor 6, and the panel 55 that is operated to change the control method of the motor 6. The resin part 60 that supports the panel 55 holds the control circuit board 19.

[0149] In the above configuration, the panel 55 and the control circuit board 19 are supported by one resin part 60, thereby reducing the number of parts of the power tool 1. By reducing the number of parts of the power tool 1, the number of assembly steps for the power tool 1 is reduced.

[0150] In the embodiment, the panel 55 contacts the resin portion 60 .

[0151] In the above configuration, the panel 55 is directly supported by the resin part 60, so that the number of parts of the power tool 1 is reduced.

[0152] In the embodiment, the panel 55 is fixed to the resin part 60 .

[0153] In the above configuration, the relative movement between the panel 55 and the resin part 60 is suppressed.

[0154] In the embodiment, the panel 55 faces the circuit board 51. The resin part 60 holds the circuit board 51.

[0155] In the above configuration, the resin part 60 supports not only the panel 55 and the control circuit board 19 but also the circuit board 51, so that the number of parts of the power tool 1 is reduced.

[0156] In the embodiment, the panel 55 has an operating portion 56 which is an elastically deformable portion. The circuit board 51 supports a switch element 52 which is operated when the operating portion 56 is pressed.

[0157] In the above configuration, when the operation portion 56 is pressed to operate the switch element 52, the control method of the motor 6 is changed.

[0158] In this embodiment, the panel 55 has a display section 57 which is a light transmitting section. The circuit board 51 supports a light emitting element 53 which irradiates the display section 57 with light.

[0159] In the above configuration, the light emitting state of the light emitting element 53 is changed in accordance with the change in the control method of the motor 6, so that the worker can visually recognize that the control method of the motor 6 has been changed.

[0160] In an embodiment, the power tool 1 comprises a motor 6 having a rotor 27 that rotates around a motor rotation axis AX extending in the fore-and-aft direction, an anvil 10 which is an output part arranged forward of the motor 6 and rotates based on the rotational force of the rotor 27, a housing 2 which has a motor accommodating section 21 that accommodates the motor 6, a grip section 22 extending downward from the motor accommodating section 21, and a battery holding section 23 connected to the lower end of the grip section 22, a control circuit board 19 accommodated in the housing 2, and an operation display section 16 arranged at the rear of the housing 2 and connected to the control circuit board 19.

[0161] In the above configuration, since the operation display unit 16 is disposed at the rear of the housing, the operator can operate and view the operation display unit 16 while facing the front of the power tool 1 toward the work target. In other words, the operator can operate and view the operation display unit 16 while holding the grip portion 22 in his / her hand and in a working posture using the power tool 1, without pulling the power tool 1 back to his / her hand. This prevents a decrease in the operability and visibility of the operation display unit 16. In addition, since the operation display unit 16 is disposed at the rear of the housing 2, it is not necessary to provide an area for providing the operation display unit 16 at the front of the housing 2. This improves the weight balance of the power tool 1.

[0162] In the embodiment, the operation display unit 16 is disposed at the rear of the battery holding unit 23.

[0163] In the above configuration, since the operation display unit 16 is disposed at the rear of the battery holding unit 23, the operator can operate and view the operation display unit 16 while keeping the front of the power tool 1 facing the work target. Also, since the operation display unit 16 is disposed at the rear of the battery holding unit 23, it is not necessary to provide an area for providing the operation display unit 16 at the front of the battery holding unit 23. Therefore, the weight balance of the power tool 1 is improved.

[0164] In the embodiment, the operation display unit 16 is disposed in a recess 23R provided in the battery holding unit 23.

[0165] In the above configuration, the operation display unit 16 does not protrude from the surface of the battery holding portion 23, making it easier for the operator to handle the power tool 1.

[0166] In the embodiment, the center of the operation display unit 16 and the center of the battery holding portion 23 coincide with each other in the left-right direction.

[0167] The above-described configuration improves the left-right weight balance of the power tool 1. Also, the operability and visibility of the operation display unit 16 are improved.

[0168] In the embodiment, the dimension of the operation display unit 16 in the left-right direction is greater than the dimension of the operation display unit 16 in the up-down direction.

[0169] In the above configuration, the shape of the operation and display unit 16 is long in the left-right direction, so that the operability and visibility of the operation and display unit 16 are improved.

[0170] In the embodiment, the operation display unit 16 is disposed rearward of the rear end portion 22B of the grip portion 22.

[0171] The above-described configuration improves the weight balance of the power tool 1 in the front-rear direction, and also improves the operability and visibility of the operation display unit 16.

[0172] In the embodiment, the operation display unit 16 is disposed rearward of the rear end portion 21B of the motor accommodating portion 21.

[0173] The above-described configuration improves the weight balance of the power tool 1 in the front-rear direction, and also improves the operability and visibility of the operation display unit 16.

[0174] In the embodiment, the control circuit board 19 is housed in the battery holding portion 23 .

[0175] In the above configuration, the distance between the operation / display unit 16 and the control circuit board 19 is short, which prevents the connection structure between the operation / display unit 16 and the control circuit board 19 from becoming large and complicated.

[0176] In the embodiment, the rear end 19B of the control circuit board 19 is disposed rearward of the rear end 22B of the grip portion 22.

[0177] With the above configuration, the weight balance of the power tool 1 in the front-rear direction is improved.

[0178] In this embodiment, the operation display unit 16 is disposed behind the control circuit board 19.

[0179] In the above-described configuration, the operation display unit 16 and the control circuit board 19 do not overlap, so that an increase in size of the battery holding unit 23 is suppressed, and the weight balance of the power tool 1 is improved.

[0180] In this embodiment, the surface 16S of the operation display unit 16 is inclined downward toward the rear.

[0181] With the above configuration, the operability and visibility of the operation and display unit 16 are improved.

[0182] In the embodiment, the surface 51S of the circuit board 51 is inclined downward toward the rear.

[0183] The above configuration prevents the operation and display unit 16 from becoming large in size. Also, the operability and visibility of the operation and display unit 16 are improved.

[0184] In the embodiment, the surface 19S of the control circuit board 19 is parallel to the motor rotation axis AX.

[0185] In the above configuration, the circuit board 51 and the control circuit board 19 are arranged to face in different directions, so that the size of the power tool 1 is prevented from increasing.

[0186] In the embodiment, the control circuit board 19 has a memory unit 191 that stores multiple operating modes of the motor 6, a command output unit 192 that outputs a mode command to set the operating mode when the operation unit 56 of the operation display unit 16 is operated, a motor control unit 193 that controls the motor 6 based on the mode command, and a display control unit 194 that controls the display unit 57 of the operation display unit 16 based on the mode command.

[0187] In the above configuration, the operation unit 56 of the operation display unit 16 is operated to set the operation mode of the motor 6. Furthermore, the display unit 57 of the operation display unit 16 is controlled based on a mode command, so that the operator can recognize the operation mode of the motor 6 by looking at the display unit 57.

[0188] In an embodiment, in the front-to-rear direction, a first distance G1 between the front end 22A of the lower end of the grip portion 22 and the front end 23A of the battery holding portion 23 is shorter than or equal to a second distance G2 between the rear end 22B of the lower end of the grip portion 22 and the rear end 23B of the battery holding portion 23.

[0189] In the above configuration, the grip portion 22 is disposed approximately in the center of the battery holding portion 23 in the front-rear direction, improving the weight balance of the power tool 1 in the front-rear direction.

[0190] In the embodiment, the power tool 1 includes a battery mounting portion 13 disposed below a battery holding portion 23. A battery pack 25 is inserted from the front of the battery holding portion 23 and mounted on the battery mounting portion 13.

[0191] With the above configuration, the operator can easily mount the battery pack 25 in the battery mounting portion 13. Furthermore, with the battery pack 25 mounted in the battery mounting portion 13, the weight balance of the power tool 1 in the front-rear direction is improved.

[0192] [Second embodiment] A second embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0193] 14 is a vertical cross-sectional view showing the lower part of the power tool 1 according to the embodiment. In the embodiment, the resin part 61 supports the panel 55. The resin part 61 holds the main body side terminals 13A of the battery mounting part 13. The resin part 61 holds the circuit board 51. The panel 55 contacts the rear part of the resin part 61. The panel 55 is fixed to the rear part of the resin part 61. The rear part of the resin part 61 is disposed in the recess 23R provided in the battery holding part 23.

[0194] The resin part 61 is fixed to the battery holding part 23. The resin part 61 is sandwiched between the left housing 2L and the right housing 2R. The resin part 61 is fixed to the left housing 2L and the right housing 2R by the screw 2S. The resin part 61 has a through hole through which the screw 2S passes. The through hole penetrates the left end surface and the right end surface of the resin part 61. The screw 2S passes through a screw opening provided in the right housing 2R, passes through the resin part 61, and is then inserted into a screw hole provided in the left housing 2L. The panel 55, the main body side terminal 13A, and the circuit board 51 are each fixed to the battery holding part 23 via the resin part 61.

[0195] The control circuit board 19, the circuit board 51, the switch element 52, the light emitting element 53, and the resin portion 61 are each disposed inside the battery holding portion .

[0196] The control circuit board 19 is accommodated in the board case 19C. The control circuit board 19 is disposed inside the battery holding portion 23 while being accommodated in the board case 19C. The board case 19C is made of synthetic resin. The board case 19C and the resin portion 61 are separate bodies. The board case 19C and the resin portion 61 may be integrated.

[0197] As described above, in the embodiment, the power tool 1 includes the motor 6, the battery mounting portion 13 including the body side terminal 13A to which power is supplied from the battery pack 25, and the panel 55 that is operated to change the control method of the motor 6. The resin portion 61 that supports the panel 55 holds the body side terminal 13A.

[0198] In the above configuration, the panel 55 and the main body side terminal 13A of the battery mounting portion 13 are supported by one resin part 61, thereby reducing the number of parts of the power tool 1. By reducing the number of parts of the power tool 1, the number of assembly steps for the power tool 1 is reduced.

[0199] In the embodiment, the panel 55 contacts the resin portion 61 .

[0200] In the above-described configuration, the panel 55 is directly supported by the resin portion 61, so that the number of parts of the power tool 1 is reduced.

[0201] In the embodiment, the panel 55 is fixed to the resin part 61 .

[0202] In the above configuration, the relative movement between the panel 55 and the resin portion 61 is suppressed.

[0203] In the embodiment, the panel 55 faces the circuit board 51. The resin portion 61 holds the circuit board 51.

[0204] In the above-described configuration, the resin portion 61 supports not only the panel 55 and the main body side terminals 13A but also the circuit board 51, so that the number of parts of the power tool 1 is reduced.

[0205] [Third embodiment] A third embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0206] 15 is a vertical cross-sectional view showing the lower part of the power tool 1 according to the embodiment. As in the above-described embodiment, the panel 55 is disposed behind the battery holding portion 23. The panel 55 is supported by the resin portion 61.

[0207] In the embodiment, an elastic body 62 is disposed between the grip portion 22 and the battery holding portion 23. In the embodiment, the grip portion 22 and the battery holding portion 23 are separate. The grip portion 22 and the battery holding portion 23 are separate bodies. The grip portion 22 and the battery holding portion 23 are connected via the elastic body 62. An example of the elastic body 62 is rubber. The elastic body 62 is in the shape of a ring that fits along the lower end portion of the grip portion 22. The elastic body 62 may be composed of, for example, two C-shaped elastic bodies.

[0208] A light 63 is disposed in front of the battery holding portion 23. The light 63 emits illumination light. The light 63 illuminates the anvil 10 and the periphery of the anvil 10 with the illumination light. The light 63 also illuminates the tip tool attached to the anvil 10 and the periphery of the tip tool with the illumination light.

[0209] As described above, in the embodiment, the power tool 1 comprises a motor 6, a motor accommodating section 21 that accommodates the motor 6, a grip section 22 extending from the motor accommodating section 21, a battery holding section 23 to which a battery pack 25 for supplying power to the motor 6 is attached, an elastic body 62 arranged between the grip section 22 and the battery holding section 23, and a panel 55 arranged at the rear of the battery holding section 23 and operated to change the control method of the motor 6.

[0210] In the above configuration, the elastic body 62 suppresses the vibration of the motor 6 from being transmitted to the battery holding portion 23. Since the vibration of the battery holding portion 23 is suppressed, the operability and visibility of the panel 55 are improved. Furthermore, since the vibration of the operation display portion 16 including the panel 55 is suppressed, the durability of the operation display portion 16 is improved.

[0211] In the embodiment, the power tool 1 includes a light 63 disposed in front of the battery holder 23 .

[0212] In the above configuration, the light 63 illuminates the anvil 10 and the periphery of the anvil 10 with illumination light. The light 63 also illuminates the tip tool attached to the anvil 10 and the periphery of the tip tool with illumination light.

[0213] Fig. 16 is a diagram showing a modified example of the power tool 1 according to the third embodiment. Fig. 17 is an exploded perspective view showing a part of the power tool 1 according to the third embodiment. As in the embodiment shown in Fig. 15, the grip portion 22 and the battery holding portion 23 are separated. The elastic body 62 is disposed between the grip portion 22 and the battery holding portion 23. The operation display portion 16 is disposed at the rear of the battery holding portion 23. The operation display portion 16 and the control circuit board 19 are connected via a lead wire 85.

[0214] As shown in FIG. 17, the grip portion 22 and the battery holding portion 23 are separated. The elastic body 62 is disposed between the grip portion 22 and the battery holding portion 23. The elastic body 62 is configured of one ring-shaped elastic body. The elastic body 62 may be configured of, for example, two C-shaped elastic bodies. The operation display unit 16 is disposed at the rear of the battery holding portion 23. The grip portion 22 has a pair of half-split housing structures divided into left and right parts. The battery holding portion 23 also has a pair of half-split housing structures divided into left and right parts. The operation display unit 16 is sandwiched between the rear of the battery holding portion 231 on the left side and the rear of the battery holding portion 232 on the right side.

[0215] FIG. 18 is a cross-sectional view showing a part of a modified example of the electric power tool 1 according to the third embodiment. FIG. 19 is an exploded perspective view showing a part of a modified example of the electric power tool 1 according to the third embodiment. As in the embodiment shown in FIG. 15 and FIG. 16, the grip part 22 and the battery holding part 23 are separated. The elastic body 62 is disposed between the grip part 22 and the battery holding part 23. The elastic body 62 is formed of one ring-shaped elastic body. The elastic body 62 may be formed of, for example, two C-shaped elastic bodies. The operation display part 16 is disposed at the rear of the battery holding part 23. The grip part 22 has a pair of half-split housing structures divided into left and right parts. The battery holding part 23 also has a pair of half-split housing structures divided into left and right parts. The operation display part 16 is sandwiched between the rear of the battery holding part 231 on the left side and the rear of the battery holding part 232 on the right side.

[0216] [Fourth embodiment] A fourth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0217] Fig. 20 is a vertical cross-sectional view showing the lower part of the power tool 1 according to the embodiment. As shown in Fig. 20, the lower end of the panel 55 (operation display unit 16) may be disposed below the main body side terminals 13A. Since the panel 55 is enlarged, the display items on the panel 55 can be enlarged, improving visibility.

[0218] [Fifth embodiment] A fifth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0219] Fig. 21 is a vertical cross-sectional view showing the electric power tool 1 according to the embodiment. As shown in Fig. 21, the control circuit board 190 for controlling the motor 6 is housed in the grip portion 22. The operation display portion 16 including the panel 55 operated to change the control method of the motor 6 is disposed at the rear of the battery holding portion 23. The control circuit board 190 and the operation display portion 16 are connected via a lead wire 81. The control circuit board 190 and the main body side terminal 13A are connected via a lead wire 82. The control circuit board 190 and the switch circuit connected to the trigger lever 14 are connected via a lead wire 83.

[0220] The control circuit 190A of the control circuit board 190 includes a microcomputer 190B, a gate drive circuit 190C, an inverter circuit 190D, and a capacitor 190E. The microcomputer 190B includes a processor such as a central processing unit (CPU), a non-volatile memory such as a read only memory (ROM), and a volatile memory such as a random access memory (RAM). The inverter circuit 190D supplies a drive current to the coil 31 of the motor 6 based on the power supplied from the battery pack 25. The inverter circuit 190D has six switching elements. The switching elements include field effect transistors (FETs). The switching elements may be IGBTs or MOSFETs. The gate drive circuit 190C is a drive circuit that drives the switching elements of the inverter circuit 190D. The microcomputer 190B outputs a control signal to the gate drive circuit 190C to drive the switching elements of the inverter circuit 190D. Capacitor 190E is provided to reduce noise generated when the switching element performs switching.

[0221] The surface of the control circuit board 190 is perpendicular to the motor rotation axis AX. The surface 16S of the operation display unit 16 is inclined downward toward the rear.

[0222] As described above, in the embodiment, the electric power tool 1 comprises a motor 6 having a rotor 27 that rotates around a motor rotation axis AX extending in the fore-and-aft direction, an anvil 10 which is an output part that is arranged forward of the motor 6 and rotates based on the rotational force of the rotor 27, a housing 2 which has a motor accommodating section 21 that accommodates the motor 6, a grip section 22 that extends downward from the motor accommodating section 21, and a battery holding section 23 connected to the lower end of the grip section 22, a control circuit board 190 that is accommodated in the grip section 22 and controls the motor 6, and an operation display section 16 which is arranged at the rear of the battery holding section 23 and includes a panel 55 which is operated to change the control method of the motor 6.

[0223] In the above-described configuration, the control circuit board 190 is housed in the grip portion 22, which prevents the power tool 1 from becoming large in size. In particular, the battery holding portion 23 is prevented from becoming large in size.

[0224] In the embodiment, the surface of the control circuit board 190 is perpendicular to the motor rotation axis AX.

[0225] The above configuration prevents the power tool 1 from becoming large. The control circuit board 190 is long in the vertical direction. The grip portion 22 is also long in the vertical direction. By accommodating the control circuit board 190 along the grip portion 22, the power tool 1 is prevented from becoming large.

[0226] FIG. 22 is a perspective view showing a modified example of the control circuit board 190 and the trigger lever 14 according to the fifth embodiment. As shown in FIG. 22, the control circuit board 190 and the switch circuit connected to the trigger lever 14 may be integrated. In the example shown in FIG. 22, the control circuit board 190 has a microcomputer 190B, an inverter circuit 190D including six switching elements, and a capacitor 190E. The control circuit board 190 also has a motor terminal 190F connected to the motor 6, and a main body side terminal 190G to which the battery pack 25 is connected. The main body side terminal 190G has the same function as the main body side terminal 13A described in the above embodiment. The operation display unit 16 and the microcomputer 190B are connected via a lead wire 86.

[0227] [Sixth embodiment] A sixth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0228] FIG. 23 is a rear perspective view showing a lower part of the electric power tool 1 according to the embodiment. FIG. 24 is a vertical cross-sectional view showing the electric power tool according to the embodiment. As shown in FIG. 23, an air intake 65 may be provided in the panel 55. When the fan 12 rotates, the air around the battery holding part 23 flows into the internal space of the battery holding part 23 through the air intake 65. As shown by the arrow FL in FIG. 24, the air that flows into the internal space of the battery holding part 23 cools the circuit board 51 and the control circuit board 19. The air that has cooled the circuit board 51 and the control circuit board 19 flows through the internal space of the grip part 22, cools the motor 6, and is then discharged from the exhaust port 20B provided in the rear cover 3.

[0229] [Seventh embodiment] A seventh embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0230] Fig. 25 is a rear view showing the power tool 1 according to the embodiment. As shown in Fig. 25, the housing 2 may be composed of an upper housing 2U and a lower housing 2B. The operation display unit 16 including the panel 55 may be sandwiched between the upper housing 2U and the lower housing 2B.

[0231] [Eighth embodiment] An eighth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0232] Fig. 26 is an exploded front perspective view of the electric power tool according to the embodiment. Fig. 27 is a vertical cross-sectional view of the lower part of the electric power tool 1 according to the embodiment. Fig. 28 is a perspective view of the control circuit board 19 according to the embodiment. As shown in Fig. 26, the housing 2 includes a front housing 2F and a rear housing 2G. That is, in the embodiment, the housing 2 includes a pair of half housings divided into front and rear parts. The housing 2 is formed by connecting the front housing 2F and the rear housing 2G. The operation display unit 16 is disposed at the rear of the battery holding unit 23 of the rear housing 2G.

[0233] A battery connector 195 is provided for electrically connecting the battery pack 25 and the control circuit board 19. The control circuit board 19 is integrally attached on the battery connector 195. Side plates 196 are erected around the battery connector 195, and the battery connector 195 is formed into a low case shape in order to integrally attach the control circuit board 19 to the upper part of the side plates 196. Then, after required wiring connection is made between the control circuit etc. mounted on the control circuit board 19 and the battery connector 195, the control circuit board 19 is inserted into the cased battery connector 195 so as to have a required assembly structure, and a potting material (not shown) is dropped into the cased battery connector 195 by potting processing and solidified, and the control circuit board 19 is integrated on the battery connector 195 in a required assembly structure. The control circuit board 19 also has a battery terminal 197 to be connected to the battery pack 25.

[0234] 27, the operation display unit 16 may have a hook portion 66 that is hooked onto an inner wall of the battery holding portion 23. An example of the hook portion 66 is a snap fit. The operation display unit 16 may be inserted into a recess 23R of the battery holding portion 23. The operation display unit 16 is connected to the control circuit board 19 via a lead wire 84. In the embodiment, the lead wire 84 is connected to the control circuit board 19 via a connector.

[0235] [Ninth embodiment] A ninth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0236] Fig. 29 is a rear perspective view showing a lower part of the power tool 1 according to the embodiment. In the above-described embodiment, the operation display unit 16 has an operation unit 56 that is pressed by an operator. As shown in Fig. 29, the operation display unit may include a dial 67. The dial 67 is disposed at the rear of the battery holding unit 23. The dial 67 rotates about a rotation axis extending in the vertical direction. The control method of the motor 6 may be changed by rotating the dial 67. The operator can intuitively change the control method of the motor 6.

[0237] [Tenth embodiment] A tenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0238] Fig. 30 is a rear perspective view showing a lower part of the power tool 1 according to the embodiment. As shown in Fig. 30, the operation display unit may include a lever 68 that is movable in the left-right direction. The lever 68 is disposed at the rear of the battery holding unit 23. The control method of the motor 6 may be changed by moving the lever 68. The operator can intuitively change the control method of the motor 6.

[0239] [Eleventh embodiment] An eleventh embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0240] Fig. 31 is a rear perspective view showing a lower part of the power tool 1 according to the embodiment. As shown in Fig. 31, the operation display unit may include a touch panel 69. The touch panel 69 includes a display and a touch sensor arranged on the display. The touch panel 69 is arranged on the rear of the battery holding unit 23. The operation mode of the motor 6 is displayed on the display. The control method of the motor 6 may be changed by operating the touch panel 69.

[0241] [Twelfth embodiment] A twelfth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0242] Fig. 32 is a rear perspective view showing a lower part of the power tool 1 according to the embodiment. As shown in Fig. 32, the operation display unit may include a microphone 70. The control circuit board 19 may change the control method of the motor 6 based on a voice input to the microphone 70.

[0243] [Thirteenth embodiment] A thirteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0244] FIG. 33 is a rear view showing the electric power tool 1 according to the embodiment. FIG. 34 is a block diagram showing the electric power tool 1 according to the embodiment. The operation display unit 16 may be provided in the battery pack 25. The operation display unit 16 may be disposed at the rear of the battery pack 25. The battery pack 25 communicates with the control circuit board 19 via the main body side terminal 13A. An operation signal generated by operating the operation display unit 16 is transmitted to the control circuit board 19 via the main body side terminal 13A. The control circuit board 19 may change the control method of the motor 6 based on the operation signal from the battery pack 25. The control circuit board 19 may transmit a control signal for causing the light emitting element 53 of the operation display unit 16 to emit light to the battery pack 25 via the main body side terminal 13A.

[0245] [Fourteenth embodiment] A fourteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0246] Fig. 35 is a right side view showing the power tool 1 according to the embodiment. In the embodiment, a button battery is attached to the grip portion 22. Even if the battery pack 25 is removed from the battery attachment portion 13, the control circuit board 19 can continue to operate by power supplied from the button battery. A lid 71 that covers the button battery is provided on the grip portion 22. The operation display unit 16 may be disposed on the lid 71.

[0247] [Fifteenth embodiment] A fifteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0248] 36 is a diagram illustrating a control circuit board 72 and a panel 55 according to an embodiment. The control circuit board 72 has a motor control circuit 19A for controlling the motor 6. In the embodiment, the light-emitting element 53 is mounted on the control circuit board 72. The circuit board 51 described in the above embodiment is omitted. The light-emitting element 53 is disposed behind the motor control circuit 19A. Light emitted from the light-emitting element 53 is supplied to the display unit 57 of the panel 55 via the light-guiding member 73. According to the embodiment, since the circuit board 51 is omitted, the number of parts of the power tool 1 is reduced, and the power tool 1 is prevented from becoming larger.

[0249] [Sixteenth embodiment] A sixteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0250] Fig. 37 is a rear view showing the power tool 1 according to the embodiment. In the above-described embodiment, the panel 55 has the operation unit 56 and the display unit 57. The display unit 57 may be provided on the panel 55, and the operation unit 56 may be disposed above the panel 55. In the example shown in Fig. 37, the operation unit 56 is disposed on the grip unit 22. The first operation unit 56A is disposed on the left side of the grip unit 22, and the second operation unit 56B is disposed on the right side of the grip unit 22. The operation unit 56 may be disposed on the rear side of the grip unit 22. The operation unit 56 may be disposed in the motor accommodating unit 21.

[0251] [Seventeenth embodiment] A seventeenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0252] FIG. 38 is a rear perspective view showing the electric power tool 1E according to the embodiment. The electric power tool 1E has a motor housing 121 that houses a motor, a grip part 122, and a battery holding part 123 to which a battery pack 25 is attached. The output part 110 rotates due to a rotational force generated by the motor. The grip part 122 has a first part 122A extending rearward from an upper part of the motor housing part 121, a second part 122B extending rearward and downward from a lower part of the motor housing part 121, and a third part 122C extending downward from a rear end part of the first part 122A. A lower end part of the second part 122B is connected to a front part of the battery holding part 123. A lower end part of the third part 122C is connected to a rear part of the battery holding part 123. The grip part 122 constitutes a so-called loop handle (D-shaped handle).

[0253] The operation and display unit 16 is disposed at the rear of the battery holding unit 123. Since the operation and display unit 16 is disposed at the rear of the battery holding unit 123, the operability and visibility of the operation and display unit 16 are improved.

[0254] 39 is a rear perspective view of a power tool 1K according to an embodiment. The power tool 1K is a pistol-type screwdriver. The power tool 1K has a motor housing 621 that houses a motor, a grip part 622, and a battery holding part 623 to which a battery pack 25 is attached. The output part 610 rotates due to the rotational force generated by the motor. The grip part 622 extends downward from a lower part of the rear part of the motor housing part 621. The lower end part of the grip part 622 is connected to the front part of the battery holding part 623.

[0255] The operation and display unit 16 is disposed at the rear of the battery holding unit 623. Since the operation and display unit 16 is disposed at the rear of the battery holding unit 623, the operability and visibility of the operation and display unit 16 are improved.

[0256] [Eighteenth embodiment] An eighteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0257] FIG. 40 is a front perspective view showing a power tool 1F according to an embodiment. The power tool 1F is an angle tool. The power tool 1F has a motor housing section 221 that houses a motor 206 and a reduction gear mechanism 74, a grip section 222, and a battery holding section 223 to which a battery pack 25 is attached. The grip section 222 is connected to the rear of the motor housing section 221. The battery holding section 223 is connected to the rear of the grip section 222. The trigger lever 214 is disposed at the bottom of the grip section 222. The motor rotation axis AX of the motor 206 extends in the front-rear direction. The output section 210 rotates due to the rotational force generated by the motor 206. The rotation axis BX of the output section 210 extends in the up-down direction.

[0258] The operation and display unit 16 is disposed above the battery holding unit 223. Since the operation and display unit 16 is disposed above the battery holding unit 223, the operability and visibility of the operation and display unit 16 are improved.

[0259] [Nineteenth embodiment] A nineteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0260] FIG. 41 is a side view showing a schematic diagram of a power tool 1G according to an embodiment. The power tool 1G is an impact wrench. The power tool 1G has a motor housing 321 that houses a motor, a grip portion 322 that extends downward from the motor housing 321, a battery holding portion 323 that is connected to a lower end of the grip portion 322, and an anvil 310 that is disposed forward of the motor housing 321. The anvil 310 is a long anvil. The battery pack 25 is attached to the battery holding portion 323. A part of the battery holding portion 323 is disposed rearward of the battery pack 25. The operation display unit 16 is disposed rearward of the battery holding portion 323. According to the embodiment, the operation display unit 16 can be enlarged, and therefore the operability and visibility of the operation display unit 16 are improved.

[0261] [Twentieth embodiment] A twentieth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are given the same reference numerals, and the description of those components will be simplified or omitted.

[0262] 42 is a diagram illustrating a part of a power tool 1H according to an embodiment. In the embodiment, the battery pack 425 has a stick shape that is long in the vertical direction. The battery pack 425 is inserted into the grip part 422 from an opening provided in the lower part of the grip part 422. A main body side terminal 413 to be connected to the battery pack 425 is disposed inside the grip part 422.

[0263] The operation display unit 16 is disposed at the rear of the grip unit 422. In the vertical direction, the operation display unit 16 and at least a part of the battery pack 425 are disposed at the same position.

[0264] [Twenty-first embodiment] A twenty-first embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0265] Fig. 43 is a rear perspective view showing a part of the electric power tool 1J according to the embodiment. Fig. 44 is a vertical cross-sectional view showing a part of the electric power tool 1J according to the embodiment. As shown in Figs. 43 and 44, the electric power tool 1J includes a motor 6 having a rotor 27 rotating around a motor rotation axis AX extending in the front-rear direction, a speed reduction mechanism 7 for reducing the rotation from the motor 6, an anvil 510 which is an output part driven by the output from the speed reduction mechanism 7, and a housing 502 having a motor housing part 521 for housing the motor 6, a grip part 522 extending downward from the motor housing part 521, a support part 524 in front of the grip part 522, and a battery holding part 523 disposed below the grip part 522 and the support part 524 and to which a battery pack 525 slides and is connected. A rail part on which the battery pack 525 slides is provided at the lower end of the battery holding part 523.

[0266] The power tool 1J also includes a control circuit board 19 housed in the housing 502 and controlling the motor 6, and an operation display unit 16 disposed from the bottom of the grip portion 522 to the rear of the battery holding portion 523 and including a panel 55 that is operated to change the control method of the motor 6.

[0267] The control circuit board 19 is disposed at any position in the internal space of the housing 502. The control circuit board 19 may be housed in the internal space of the motor accommodating portion 521, the internal space of the grip portion 522, the internal space of the battery holding portion 523, or the internal space of the support portion 524.

[0268] Fig. 45 is a diagram showing the control circuit board 19 arranged in the internal space of the motor accommodating portion 521 according to the embodiment. Fig. 46 is a diagram showing the control circuit board 19 arranged in the internal space of the grip portion 522 according to the embodiment. Fig. 47 is a diagram showing the control circuit board 19 arranged in the internal space of the battery holding portion 523 according to the embodiment. Fig. 48 is a diagram showing the control circuit board 19 arranged in the internal space of the support portion 524 according to the embodiment.

[0269] In the embodiment, the anvil 510 is a rectangular prism to which a socket is attached. The power tool 1J is an impact wrench.

[0270] [Variations] In the above-described embodiment, the panel 55 may be made of metal. When the panel 55 is made of metal, damage to the panel 55 is suppressed even if an impact is applied to the panel 55 when, for example, the power tool 1 is dropped.

[0271] In the above embodiment, the anvil 10 has a hexagonal tool hole 10A for holding a tool bit. The anvil 10 may have a square prism shape to which a socket is attached. The power tool may be an impact wrench.

[0272] In the above-described embodiments, the power tool 1 may be at least one of an impact driver, a hammer, a hammer drill, a driver drill, an angle drill, a grinder, a circular saw, and a reciprocating saw.

[0273] In the above-described embodiment, the power source of the power tool 1 does not have to be the battery pack 25, and may be a commercial power source (AC power source). [Explanation of symbols]

[0274] 1...electric tool, 1E...electric tool, 1F...electric tool, 1G...electric tool, 1H...electric tool, 1J...electric tool, 1K...electric tool, 2...housing, 2B...lower housing, 2F...front housing, 2L...left housing, 2R...right housing, 2G...rear housing, 2U...upper housing, 2S...screw, 3...rear cover, 3S...screw, 4...hammer case, 5A...hammer case cover, 5B...bumper, 6...motor, 7...reduction mechanism, 8...spindle, 8A...flange portion, 8B...spindle shaft portion, 8C...projection portion, 8D...spindle groove, 9...impact mechanism, 10...anvil, 10 A...tool hole, 10B...anvil recess, 10C...anvil shaft, 10D...anvil protrusion, 11...tool holding mechanism, 12...fan, 12A...bush, 13...battery mounting section, 13A...main body terminal, 13B...terminal holding section, 14...trigger lever, 15...forward / reverse rotation switch lever, 16...operation display section, 16S...surface, 17...mode switch, 18...light assembly, 19...control circuit board, 19A...motor control circuit, 19B...rear end, 19C...board case, 19S...surface, 20A...intake port, 20B...exhaust port, 21...motor housing section, 21B...rear end, 22...grid top portion, 22A...front end portion, 22B...rear end portion, 23...battery holding portion, 23A...front end portion, 23B...rear end portion, 23R...recessed portion, 24...bearing box, 24A...recessed portion, 24B...protruding portion, 25...battery pack, 26...stator, 27...rotor, 28...stator core, 29...front insulator, 29S...screw, 30...rear insulator, 31...coil, 32...rotor core portion, 33...rotor shaft portion, 33F...front shaft portion, 33R...rear shaft portion, 34...rotor magnet, 35...sensor magnet, 37...sensor board, 38...fusing terminal, 39...rotor bearing Ring, 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...anvil bearing, 46A...O-ring, 47...hammer, 47A...hole, 47B...hammer groove, 47C...recess, 47D...hammer protrusion, 48...ball, 49...coil spring, 51...circuit board, 51S...surface, 52...switch element, 52A...first switch element, 52B...second switch element, 53...light-emitting element, 55...panel, 55S...surface,56...operation section, 56A...first operation section, 56B...second operation section, 57...display section, 60...resin section, 61...resin section, 62...elastic body, 63...light, 65...air intake port, 66...hook section, 67...dial, 68...lever, 69...touch panel, 70...microphone, 71...cover, 72...control circuit board, 73...light guiding member, 74...reduction mechanism, 81...lead wire, 82...lead wire, 83...lead wire, 84...lead wire, 85...lead wire, 86... Lead wire, 110...output section, 121...motor housing section, 122...grip section, 122A...first section, 122B...second section, 122C...third section, 123...battery holding section, 190...control circuit board, 190A...control circuit, 190B...microcomputer, 190C...gate drive circuit, 190D...inverter circuit, 190E...capacitor, 190F...motor terminal, 190G...main body side terminal, 191...storage section, 1 92...command output section, 193...motor control section, 194...display control section, 195...battery connector, 196...side plate section, 197...battery terminal, 206...motor, 210...output section, 214...trigger lever, 221...motor housing section, 222...grip section, 223...battery holding section, 231...battery holding section, 232...battery holding section, 310...anvil, 321...motor housing section, 322...grip section, 323...battery battery holding portion, 413...main body side terminal, 422...grip portion, 425...battery pack, 502...housing, 510...anvil, 521...motor housing portion, 522...grip portion, 523...battery holding portion, 524...support portion, 525...battery pack, 610...output portion, 621...motor housing portion, 622...grip portion, 623...battery holding portion, AX...motor rotating shaft, BX...rotating shaft, G1...first distance, G2...second distance.

Claims

1. A motor having a rotor that rotates around a motor rotation axis extending in the front-to-back direction, An output unit positioned in front of the motor and rotating based on the rotational force of the rotor, A housing having a motor housing portion for housing the motor, a grip portion extending downward from the motor housing portion, and a battery holding portion connected to the lower end of the grip portion, The grip portion houses a control circuit board for controlling the motor, The battery holder is located at the rear of the battery holder and includes a panel that is operated to change the motor control method, Power tools.

2. The panel is supported by a resin part, The power tool according to claim 1.

3. The panel is in contact with the resin part, The power tool according to claim 2.

4. The panel is fixed to the resin part. The power tool according to claim 2.

5. The panel faces the circuit board, The resin part holds the circuit board. The power tool according to claim 2.

6. The panel has an elastically deformable portion and faces the circuit board, The circuit board supports a switch element that is operated by the elastic deformation portion being pressed. The power tool according to claim 1.

7. The panel has a light-transmitting portion and faces the circuit board, The circuit board supports a light-emitting element that irradiates the light-transmitting portion with light. The power tool according to claim 1.

8. The housing includes a left housing and a right housing that is fixed to the left housing by screws. The power tool according to claim 1.

9. It includes a battery mounting section that includes terminals on the main unit side to which power is supplied from the battery, The battery mounting portion is located below the battery holding portion. The power tool according to claim 1.

10. The grip portion is provided with a trigger lever that is operated to start the motor, The power tool according to claim 1.

11. The panel is positioned in a recess provided in the battery holding portion. The power tool according to claim 1.

12. In the left-right direction, the center of the panel and the center of the battery holder coincide. The power tool according to claim 1.

13. The panel is positioned behind the rear end of the grip portion. The power tool according to claim 1.

14. The panel is positioned behind the rear end of the motor housing. The power tool according to claim 1.

15. The rear end of the control circuit board is positioned in front of the front end of the battery holding portion. The power tool according to claim 1.

16. The panel is positioned behind the control circuit board. The power tool according to claim 1.

17. The surface of the panel is inclined downward toward the rear. The power tool according to claim 1.

18. The left-right dimension of the panel is greater than the up-down dimension of the panel. The power tool according to claim 1.

19. A motor having a rotor that rotates around a motor rotation axis extending in the front-to-back direction, A reduction mechanism for reducing the rotation from the motor, An output unit driven by the output from the reduction mechanism, A housing having a motor housing portion for housing the motor, a grip portion extending downward from the motor housing portion, a support portion in front of the grip portion, and a battery holding portion positioned below the support portion to which a battery pack slides and is connected, A control circuit board housed in the aforementioned housing controls the motor, The system includes a panel located at least one of the lower part of the grip portion and the rear part of the battery holder portion, which is operated to change the motor control method. Power tools.

20. The control circuit board is housed in the grip portion, the support portion, or the battery holding portion. The power tool according to claim 19.

Images