CN212978140U - Electric working machine - Google Patents

Abstract

The utility model provides an electric operation machine can make main shaft and hammer smoothly relative movement. The electric working machine includes: a motor; a main shaft that rotates by power generated by a motor; a hammer disposed around the main shaft; a ball disposed between the spindle and the hammer; an anvil that is struck by the hammer in a rotational direction; and a supply unit for supplying lubricating oil to the balls.

Description

Electric working machine

Technical Field

The utility model relates to an electric operation machine.

Background

In the technical field related to electric working machines, an impact driver as disclosed in patent document 1 is known.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2019-072811

SUMMERY OF THE UTILITY MODEL

The impact driver has: a main shaft; a hammer disposed around the main shaft; and balls disposed between the spindle and the hammer. If the spindle and the hammer are not smoothly moved relative to each other, the performance of the impact driver may be degraded.

The utility model aims to provide a can make main shaft and hammer smoothly relative movement.

According to the utility model discloses, provide an electric operation machine, it possesses: a motor; a main shaft rotated by power generated by the motor; a hammer disposed around the main shaft; a ball disposed between the spindle and the hammer; an anvil that is struck by the hammer in a rotational direction; and a supply unit for supplying lubricating oil to the balls.

Effect of the utility model

According to the utility model discloses, can make main shaft and hammer smoothly relative movement.

Drawings

Fig. 1 is a perspective view showing an electric power tool according to an embodiment.

Fig. 2 is a side view showing the electric power tool according to the embodiment.

Fig. 3 is a rear view showing the electric power tool according to the embodiment.

Fig. 4 is a sectional view showing the electric power tool according to the embodiment.

Fig. 5 is an enlarged sectional view of an upper portion of the electric power tool according to the embodiment.

Fig. 6 is an enlarged sectional view of an upper portion of the electric power tool according to the embodiment.

Fig. 7 is a perspective view showing a main shaft, a striking mechanism, and an anvil according to the embodiment.

Fig. 8 is an exploded perspective view of the main shaft, the striking mechanism, and the anvil according to the embodiment as viewed from the front.

Fig. 9 is an exploded perspective view of the main shaft, the striking mechanism, and the anvil according to the embodiment as viewed from the rear.

Fig. 10 is a block diagram showing an electric power tool including a controller according to an embodiment.

Fig. 11 is a schematic diagram showing an operation of the controller according to the embodiment.

Fig. 12 is a diagram showing an operation panel according to the embodiment.

Fig. 13 is a schematic diagram illustrating a control mode switching method according to the embodiment.

Fig. 14 is a diagram for explaining control characteristics of the striking force pattern according to the embodiment.

Fig. 15 is a diagram for explaining the rotation speed of the motor when the hammer strikes the anvil in the rotational direction in the striking force mode according to the embodiment.

Fig. 16 is a diagram for explaining the control characteristics of the wood pattern according to the embodiment.

Fig. 17 is a diagram for explaining the control characteristics in the self-tapping (thick) mode according to the embodiment.

Fig. 18 is a diagram for explaining control characteristics of a bolt pattern in the bolt fastening operation according to the embodiment.

Fig. 19 is a diagram for explaining control characteristics of a bolt pattern in the bolt removal operation according to the embodiment.

Fig. 20 is a transition diagram showing a state of the notification device in setting the striking force mode according to the embodiment.

Fig. 21 is a transition diagram showing a state of a notification device in setting the dedicated mode according to the embodiment.

Fig. 22 is a transition diagram showing states of the notification device in the fastest mode registration processing and the setting of the storage mode according to the embodiment.

Fig. 23 is a transition diagram showing the state of the notification device in the strong mode registration processing and the setting of the storage mode according to the embodiment.

Fig. 24 is a transition diagram showing a state of a notification device in the middle mode registration processing and the setting of the storage mode according to the embodiment.

Fig. 25 is a transition diagram showing the state of the notification device in the weak pattern registration processing and the setting of the storage pattern according to the embodiment.

Fig. 26 is a transition diagram showing the state of the notification device in the registration processing of the wood pattern and the setting of the storage pattern according to the embodiment.

Fig. 27 is a transition diagram showing a state of a notification device in the self-tapping (thin) mode registration processing and the setting of the storage mode according to the embodiment.

Fig. 28 is a transition diagram showing the state of the notification device in the self-tapping (thick) mode registration processing and the setting of the storage mode according to the embodiment.

Fig. 29 is a transition diagram showing a state of a notification device in the bolt 1 mode registration processing and the setting of the storage mode according to the embodiment.

Fig. 30 is a transition diagram showing a state of a notification device in the registration process of the bolt 2 pattern and the setting of the storage pattern according to the embodiment.

Fig. 31 is a transition diagram showing a state of a notification device in the bolt 3 mode registration processing and the setting of the storage mode according to the embodiment.

Fig. 32 is an enlarged cross-sectional view of a lower portion of the electric power tool according to the embodiment.

Fig. 33 is an enlarged cross-sectional view of a lower portion of the electric power tool according to the embodiment.

Fig. 34 is an enlarged cross-sectional view of a part of the deformation suppressing member and the controller case according to the embodiment.

Fig. 35 is a perspective view showing the operation panel and the deformation suppressing member according to the embodiment.

Fig. 36 is a side view showing the operation panel and the deformation suppressing member according to the embodiment.

Fig. 37 is a schematic diagram showing a state in which an external force acts on the electric power tool according to the comparative example.

Fig. 38 is a schematic view showing a state in which an external force acts on the electric power tool according to the embodiment.

Fig. 39 is a schematic view of a deformation suppressing member according to an embodiment.

Fig. 40 is a perspective view of the fan according to the embodiment as viewed from the front.

Fig. 41 is a perspective view of the fan according to the embodiment as viewed from the rear.

Fig. 42 is a sectional view showing a fan according to the embodiment.

Fig. 43 is a sectional view showing a part of the fan and the motor according to the embodiment.

Fig. 44 is a perspective view showing a spindle according to the embodiment.

Fig. 45 is a perspective view showing a spindle, balls, and a hammer according to the embodiment.

Fig. 46 is a sectional view showing the hammer according to the embodiment.

Fig. 47 is a sectional view showing the hammer according to the embodiment.

Fig. 48 is a development view schematically showing an outer surface of the rod portion according to the embodiment.

Fig. 49 is a schematic diagram for explaining the operation of the hammer according to the embodiment.

Fig. 50 is a schematic view of a deformation suppressing member according to the embodiment.

Fig. 51 is a sectional view showing a deformation suppressing member according to the embodiment.

Fig. 52 is a schematic view of a deformation suppressing member according to the embodiment.

Description of the symbols

1 … electric tool, 2 … housing, 2C … interface, 2L … left housing, 2R … right housing, 2S … screw, 3 … rear housing, 3S … screw, 4 … hammer case, 5 … battery mounting portion, 5a … junction box, 5B … tool side terminal, 6 … motor, 7 … reduction mechanism, 8 … main shaft, 9 … striking mechanism, 10 … anvil, 10B … body, 11 … chuck sleeve, 12 … fan, 13 … controller, 13M … opening, 14 … trigger switch, 14a … trigger, 14B … switch circuit, 15 … forward and reverse switch lever, 16 … operation panel, 17 … mode switch, 18 … lamp, 19 … air inlet, 20a … second air outlet, 20a … air outlet, 20B air outlet …, first air outlet …, 20B … air outlet, 20B …, and 3B, 20B exhaust port, 21 motor housing, 21A cylindrical part, 22 grip part, 23 controller housing, 23A horizontal housing holder, 23B horizontal junction box holder, 23C panel holder, 23D front housing holder, 23E front junction box holder, 23F rear junction box holder, 23G contact, 24 bearing holder, 25 battery pack, 26 stator, 27 rotor, 28 stator core, 29 front insulator, 29S screw, 30 rear insulator, 31 coil, 32 rotor shaft, 33 rotor core, 34 permanent magnet, 35 sensor permanent magnet, 36 resin sleeve, 37 sensor substrate, 38 coil terminal, 39 front bearing, 40 rear bearing, 41 pinion, 42 planetary gear, 42P pin, 43 internal gear, 44 … flange portion, 45 … shaft portion, 46 … rear bearing, 47 … hammer, 47B … body, 48 … ball, 49 … coil spring, 50 … main shaft groove, 50a … first portion, 50B … second portion, 51 … hammer groove, 51a … third portion, 51B … fourth portion, 52 … convex portion, 53 … concave portion, 54 … washer, 55 … insert hole, 56 … front bearing, 57 … hole, 58 … hole, 59 … hammer protrusion, 60 … anvil protrusion, 61 … bushing, 62 … controller housing, 62a … bottom plate, 62B … wall plate, 62Bb … rear wall plate, 62Bf … front wall plate, 62Bl … left side wall plate, 62Br … right side wall plate, 63 … opening, 64 … striking switch, … operating device, 46B … operating device, … storage device, light emitting device detecting device, … detecting device …, … detecting device and … detecting device, 72a … first operation light emitter, 72B … second operation light emitter, 72C … third operation light emitter, 72D … fourth operation light emitter, 73 … identification light emitter, 74 … operation pattern storage unit, 75 … registration pattern storage unit, 76 … command output unit, 77 … motor control unit, 78 … notification control unit, 79 … first mark, 79a … mark, 79B … mark, 79C … mark, 79D … mark, 80 … second mark, 80a … mark, 80B … mark, 80C … mark, 80D … mark, 81 … third mark, 81a … mark, 81B … mark, 81C … mark, 82 … region, 83 … region, 84 … region, 85 … deformation suppressing member, 85R 72 rod, 86, …, buffer layer 72, … portion, 3690 main connection portion …, … portion 3690, … a … B72, … B72 portion, … B72 rear surface …, … B72, 3690, … B72, … B, … B72B, 36, 91a … inside part, 91B … outside part, 92 … second supply port, 92R … second flow path, 93 … first supply port, 93R … first flow path, 94 … internal space, 95 … front end, 96 … rear end, AX … rotation axis.

Detailed Description

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiment. The constituent elements of the embodiments described below may be combined as appropriate. In addition, some of the components may not be used.

In the embodiments, the positional relationship of the respective portions will be described using terms of left, right, front, rear, upper and lower. These terms refer to relative positions or directions with respect to the center of the electric working machine. In the embodiment, the electric working machine is an electric power tool 1 having a motor 6.

In the embodiment, a direction parallel to the rotation axis AX of the motor 6 is appropriately referred to as an axial direction, a direction around the rotation axis AX is appropriately referred to as a circumferential direction or a rotational direction, and a radial direction of the rotation axis AX is appropriately referred to as a radial direction.

The rotation axis AX extends in the front-rear direction. One axial side is forward and the other axial side is rearward. In the radial direction, a position close to the rotation axis AX or a direction close to the rotation axis AX is appropriately referred to as a radially inner side, and a position away from the rotation axis AX or a direction away from the rotation axis AX is appropriately referred to as a radially outer side.

[ outline of electric Power tool ]

Fig. 1 is a perspective view showing an electric power tool 1 according to an embodiment. Fig. 2 is a side view showing the electric power tool 1 according to the embodiment. Fig. 3 is a rear view showing the electric power tool 1 according to the embodiment. Fig. 4 is a sectional view showing the electric power tool according to the embodiment. Fig. 4 is a sectional view showing the electric power tool 1 according to the embodiment. Fig. 5 is an enlarged sectional view of an upper portion of the electric power tool 1 according to the embodiment. Fig. 6 is an enlarged sectional view of an upper portion of the electric power tool according to the embodiment. Fig. 5 is a longitudinal sectional view of the upper portion of the electric power tool 1. Fig. 6 is a cross-sectional view of the upper portion of the power tool 1.

In the embodiment, the power tool 1 is an impact driver. The electric power tool 1 includes: the hammer case 4 is attached to the rear side case 3, the hammer case 2, the battery mounting portion 5, the motor 6, the speed reduction mechanism 7, the main shaft 8, the striking mechanism 9, the anvil 10, the chuck sleeve 11, the fan 12, the controller 13, the trigger switch 14, the forward/reverse switching lever 15, the operation panel 16, the mode switching switch 17, and the lamp 18.

The housing 2 is made of synthetic resin. In an embodiment, the housing 2 is made of nylon. The housing 2 includes a left housing 2L and a right housing 2R, and the right housing 2R is disposed rightward of the left housing 2L. As shown in fig. 2, 4, and 5, the left housing 2L and the right housing 2R are fixed by a plurality of screws 2S. The housing 2 is formed of a pair of half-divided housings.

The housing 2 has: a motor housing section 21; a grip portion 22 disposed below the motor housing portion 21; and a controller housing portion 23 disposed below the grip portion 22.

The motor housing 21 is cylindrical. The motor housing 21 houses at least a part of the motor 6.

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

The controller housing portion 23 is connected to the lower end portion of the grip portion 22. The controller housing portion 23 houses the controller 13. The outer dimensions of the controller housing portion 23 are larger than the outer dimensions of the grip portion 22 in both the front-rear direction and the left-right direction.

The rear side case 3 is made of synthetic resin. The rear case 3 is disposed rearward of the motor housing 21. The rear case 3 houses at least a part of the fan 12. The rear side case 3 is configured to: covering the opening of the rear portion of the motor housing portion 21. As shown in fig. 3, the rear case 3 is fixed to the motor housing 21 by 2 screws 3S.

The motor housing 21 has an air inlet 19. The motor housing 21 has a first exhaust port 20B. The first exhaust port 20B is formed in a cylindrical portion 21A at the rear of the motor housing portion 21. The rear side case 3 has a second exhaust port 20A. The air in the external space of the housing 2 flows into the internal space of the housing 2 through the air inlet 19. The air in the inner space of the casing 2 passes through the second exhaust port 20A after passing through the first exhaust port 20B. The air in the internal space of the casing 2 flows out to the external space of the casing 2 through the first exhaust port 20B and the second exhaust port 20A.

The hammer housing 4 is made of metal. In an embodiment, the hammer housing 4 is made of aluminum. The hammer case 4 is disposed in front of the motor housing 21. The hammer case 4 is cylindrical. The inner diameter of the front portion of the hammer housing 4 is smaller than the inner diameter of the rear portion of the hammer housing 4. The rear portion of the hammer case 4 is inserted into an opening in the front portion of the motor housing 21. The rear portion of the hammer case 4 is fitted into the motor housing 21. The motor housing 21 and the hammer case 4 are connected by a bearing holder 24. At least a part of the bearing holder 24 is disposed inside the hammer case 4.

The hammer case 4 is used to house at least a part of the reduction mechanism 7, the main shaft 8, the striking mechanism 9, and the anvil 10. At least a part of the reduction mechanism 7 is disposed inside the bearing holder 24.

The battery mounting portion 5 is formed at a lower portion of the controller accommodating portion 23. Battery assembly 5 is connected to battery pack 25. Battery pack 25 is mounted on battery mounting portion 5. Battery pack 25 is detachable from battery mounting unit 5. The battery pack 25 includes secondary batteries. In the embodiment, the battery pack 25 includes a rechargeable lithium ion battery. The battery pack 25 can supply power to the electric power tool 1 by being attached to the battery attachment portion 5. The motor 6 is driven based on the electric power supplied from the battery pack 25. Controller 13 and operation panel 16 operate based on the electric power supplied from battery pack 25.

The motor 6 is a power source of the electric power tool 1. The motor 6 is an inner rotor type brushless motor. The motor 6 includes a stator 26 and a rotor 27, and the rotor 27 is disposed inside the stator 26.

The stator 26 has: a stator core 28; a front insulator 29 provided at the front of the stator core 28; a rear insulator 30 provided at the rear of the stator core 28; and a plurality of coils 31 mounted on the stator core 28 through the front insulator 29 and the rear insulator 30.

The stator core 28 includes a plurality of steel plates stacked one on another. The steel sheet is a metal sheet containing iron as a main component. The stator core 28 has a cylindrical shape. The stator core 28 has a plurality of teeth that support coils 31. The front insulator 29 and the rear insulator 30 are each an electrical insulating member made of synthetic resin. The front insulator 29 is configured to: covering a portion of the surface of the tooth. The rear insulator 30 is configured to: covering a portion of the surface of the tooth. The coil 31 is disposed around the tooth through the front insulator 29 and the rear insulator 30. The coil 31 and the stator core 28 are electrically insulated by the front insulator 29 and the rear insulator 30.

The rotor 27 rotates about the rotation axis AX. The rotor 27 has: a rotor shaft 32; a rotor core 33 disposed around the rotor shaft 32; permanent magnets 34 disposed around rotor core 33; and a sensor permanent magnet 35. The rotor shaft 32 extends in the axial direction. The rotor core 33 is cylindrical. The rotor core 33 includes a plurality of steel plates stacked one on another. The permanent magnet 34 is cylindrical. The permanent magnet 34 includes: a first permanent magnet of a first polarity, and a second permanent magnet of a second polarity. The first permanent magnets and the second permanent magnets are alternately arranged in the circumferential direction, thereby forming cylindrical permanent magnets 34. The sensor permanent magnet 35 is disposed in front of the rotor core 33 and the permanent magnet 34. At least a part of the resin sleeve 36 is disposed inside the sensor permanent magnet 35. The resin sleeve 36 is cylindrical. A resin sleeve 36 is fitted to the front of the rotor shaft 32.

The sensor substrate 37 and the coil terminal 38 are mounted on the front insulator 29. The sensor substrate 37 and the coil terminal 38 are fixed to the front insulator 29 by screws 29S. The sensor substrate 37 includes: the rotation detecting device includes an annular circuit board and a rotation detecting element supported by the circuit board. The rotation detecting element detects the position of the rotor 27 in the rotational direction by detecting the position of the sensor permanent magnet 35 of the rotor 27. The coil terminals 38 connect the plurality of coils 31 and 3 power lines from the controller 13.

The rotor shaft 32 is rotatably supported by a front bearing 39 and a rear bearing 40, respectively. The front bearing 39 is held by the bearing holder 24. The rear bearing 40 is held by the rear housing 3. The front bearing 39 supports the front portion of the rotor shaft 32. The rear bearing 40 supports the rear portion of the rotor shaft 32. The distal end portion of the rotor shaft 32 is disposed in the internal space of the hammer case 4 through the opening of the bearing holder 24.

A pinion gear 41 is provided at the tip end of the rotor shaft 32. The rotor shaft 32 is coupled to the reduction mechanism 7 via a pinion gear 41.

The speed reduction mechanism 7 is disposed in front of the motor 6. The speed reduction mechanism 7 couples the rotor shaft 32 and the main shaft 8. The speed reduction mechanism 7 transmits power generated by the motor 6 to the main shaft 8. The speed reduction mechanism 7 rotates the main shaft 8 at a rotational speed lower than the rotational speed of the rotor shaft 32. The reduction mechanism 7 includes a planetary gear mechanism.

The speed reduction mechanism 7 includes: a plurality of planetary gears 42 disposed around the pinion gear 41; and an internal gear 43 disposed around the plurality of planetary gears 42. The plurality of planetary gears 42 are respectively meshed with the pinions 41. The planetary gear 42 is rotatably supported by the main shaft 8 via a pin 42P. The internal gear 43 has internal teeth that mesh with the planetary gears 42. The internal gear 43 is fixed to the hammer housing 4. The internal gear 43 cannot rotate with respect to the hammer housing 4 at all times.

When the rotor shaft 32 is rotated by the driving of the motor 6, the pinion gear 41 is rotated, 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. The main shaft 8 connected to the planetary gear 42 via the pin 42P is rotated at a rotational speed lower than that of the rotor shaft 32 by the revolution of the planetary gear 42.

The main shaft 8 is disposed in front of the motor 6. At least a part of the main shaft 8 is disposed in front of the reduction mechanism 7. The main shaft 8 has a flange 44 and a rod 45, and the rod 45 projects forward from the flange 44. The planetary gear 42 is rotatably supported by the flange portion 44 via a pin 42P. The rotation axis of the main shaft 8 coincides with the rotation axis AX of the motor 6. The main shaft 8 rotates about a rotation axis AX. The main shaft 8 is rotatably supported by the rear bearing 46. The rear bearing 46 is held by the bearing holder 24. The rear bearing 46 supports a rear end portion of the main shaft 8.

The main shaft 8 has: a first supply port 93 to which lubricating oil is supplied, and a second supply port 92 to which lubricating oil is supplied. The lubricating oil includes grease (grease). The first supply port 93 and the second supply port 92 are provided in the rod portion 45, respectively. The main shaft 8 has: an internal space 94 for receiving lubricating oil. The first supply port 93 is connected to the internal space 94 through a first flow path 93R. The second supply port 92 is connected to the internal space 94 through a second flow path 92R. The lubricant is supplied from the first supply port 93 and the second supply port 92 to at least a part of the periphery of the main shaft 8 by the centrifugal force of the main shaft 8.

The striking mechanism 9 strikes the anvil 10 in the rotational direction based on the rotation of the main shaft 8. The striking mechanism 9 has: a hammer 47 disposed around the main shaft 8; balls 48 disposed between the main shaft 8 and the hammer 47; and a coil spring 49 supported by the main shaft 8 and the hammer 47, respectively. The hammer 47 is disposed: further forward than the speed reduction mechanism 7.

Fig. 7 is a perspective view showing the main shaft 8, the striking mechanism 9, and the anvil 10 according to the embodiment. Fig. 8 is an exploded perspective view of the main shaft 8, the striking mechanism 9, and the anvil 10 according to the embodiment as viewed from the front. Fig. 9 is an exploded perspective view of the main shaft 8, the striking mechanism 9, and the anvil 10 according to the embodiment as viewed from the rear. In fig. 7, the balls 48 and the coil springs 49 are not shown.

As shown in fig. 4, 5, 6, 7, 8, and 9, the hammer 47 has a cylindrical shape. The hammer 47 is disposed around the rod 45. The hammer 47 has: for configuring the hole 57 of the stem portion 45. The hammer 47 is rotatable together with the main shaft 8. The rotation axis of the hammer 47, the rotation axis of the main shaft 8, and the rotation axis AX of the motor 6 coincide. The hammer 47 rotates about the rotation axis AX.

The balls 48 are made of metal such as steel. The balls 48 are disposed between the rod 45 and the hammer 47. The main shaft 8 has: a main shaft groove 50 for disposing at least a portion of the ball 48. The main axial groove 50 is provided in a part of the outer surface of the rod portion 45. The hammer 47 has: a hammer channel 51 for positioning at least a portion of the balls 48. The hammer groove 51 is provided in a part of the inner surface of the hammer 47. The balls 48 are disposed between the spindle groove 50 and the hammer groove 51. The balls 48 can roll inside the main shaft groove 50 and inside the hammer groove 51. The hammer 47 is able to move with the balls 48. The spindle 8 and the hammer 47 are relatively movable in the axial direction and the rotational direction within a movable range defined by the spindle groove 50 and the hammer groove 51.

The coil spring 49 generates an elastic force that moves the hammer 47 forward. The coil spring 49 is disposed between the flange 44 and the hammer 47. An annular projection 52 is provided on the front surface of the flange 44. The convex portion 52 projects forward from the peripheral edge portion of the front surface of the flange portion 44. An annular recess 53 is provided on the rear surface of the hammer 47. The recess 53 is recessed forward from the rear surface of the hammer 47. A washer 54 is provided inside the recess 53. The rear end of the coil spring 49 is disposed inside the projection 52 and supported by the flange 44. The front end of the coil spring 49 is disposed inside the recess 53 and supported by a washer 54.

The anvil 10 is disposed in front of the hammer 47. The anvil 10 has: and an insertion hole 55 into which a front end tool is inserted. An insertion hole 55 is provided at the front end portion of the anvil 10. The front end tool is fitted to the anvil 10. Further, the anvil 10 has: a hole 58 for disposing the tip end of the rod 45. An aperture 58 is provided at the rear end of the anvil 10. The tip end of the rod portion 45 is disposed in the hole 58.

The anvil 10 is rotatable together with the hammer 47. The rotation axis of the anvil 10, the rotation axis of the hammer 47, the rotation axis of the main shaft 8, and the rotation axis AX of the motor 6 coincide. The anvil 10 rotates about the rotation axis AX. The anvil is rotatably supported to a pair of front bearings 56. A pair of front bearings 56 are held by the hammer housing 4.

The hammer 47 has: a cylindrical main body 47B and a hammer projection 59. The recess 53 is provided on the rear surface of the main body 47B. The hammer projection 59 is provided at the front of the main body 47B. The hammer projection 59 is provided in 2 pieces. The hammer projection 59 projects forward from the front portion of the main body 47B.

The anvil 10 has: a rod-shaped body 10B and an anvil projection 60. The insertion hole 55 is provided at the front end of the main body 10B. An anvil projection 60 is provided at the rear end of the anvil 10. The anvil projections 60 are provided in 2 numbers. The anvil projection 60 projects radially outward from the rear end of the main body 10B.

The hammer projection 59 and the anvil projection 60 are contactable. In a state where the hammer projection 59 and the anvil projection 60 are in contact with each other, the motor 6 is driven to rotate the anvil 10 together with the hammer 47 and the main shaft 8.

The anvil 10 is struck in the rotational direction by the hammer 47. For example, in a screw fastening operation, if the load acting on the anvil 10 is increased, it sometimes happens that: the anvil 10 cannot be rotated by only the power generated by the motor 6. If the anvil 10 cannot be rotated only by the power generated by the motor 6, the rotation of the anvil 10 and the hammer 47 is stopped. The main shaft 8 and the hammer 47 are relatively movable in the axial direction and the circumferential direction by balls 48. Even if the rotation of the hammer 47 is stopped, the main shaft 8 continues to rotate by the power generated by the motor 6. When the main shaft 8 rotates while the hammer 47 stops rotating, the balls 48 are guided by the main shaft groove 50 and the hammer groove 51 and move rearward. The hammer 47 receives a force from the balls 48 and moves rearward along with the balls 48. That is, the hammer 47 moves rearward by the rotation of the main shaft 8 in a state where the rotation of the anvil 10 is stopped. By the hammer 47 moving rearward, the contact of the hammer projection 59 and the anvil projection 60 is released.

The coil spring 49 produces: the elastic force that moves the hammer 47 forward. The hammer 47 moved to the rear moves forward by the elastic force of the coil spring 49. The hammer 47 receives a force in the rotational direction from the ball 48 when moving forward. That is, the hammer 47 moves forward while rotating. When the hammer 47 moves forward while rotating, the hammer projection 59 rotates while contacting the anvil projection 60. Thereby, the anvil protrusion 60 is struck in the rotational direction by the hammer protrusion 59. The power of the motor 6 and the inertial force of the hammer 47 act on the anvil 10 at the same time. Therefore, the anvil 10 can be rotated around the rotation axis AX with a high torque.

The chuck sleeve 11 is arranged around the front portion of the anvil 10. The chuck sleeve 11 holds the tip end tool inserted into the insertion hole 55.

As shown in fig. 4 and 5, the fan 12 is disposed behind the motor 6. The fan 12 generates: for cooling the air flow of the motor 6. Fan 12 is secured to at least a portion of rotor 27. Fan 12 is fixed to the rear portion of rotor shaft 32 via a bush 61. Fan 12 is disposed between rear bearing 40 and stator 26. The fan 12 is rotated by the rotation of the rotor 27. Rotation by rotor shaft 32 causes fan 12 to rotate with rotor shaft 32. The fan 12 rotates to allow air in the external space of the housing 2 to flow into the internal space of the housing 2 through the air inlet 19. The air flowing into the internal space of the housing 2 flows through the internal space of the housing 2, thereby cooling the motor 6. The air flowing through the internal space of the casing 2 flows out to the external space of the casing 2 through the first exhaust port 20B and the second exhaust port 20A.

As shown in fig. 4, the controller 13 is housed in the controller housing portion 23. The controller 13 outputs: a control signal for controlling the motor 6. The controller 13 includes a substrate on which a plurality of electronic components are mounted. Examples of the electronic component mounted on the substrate include: a processor such as a cpu (central Processing unit), a non-volatile memory such as a rom (read Only memory) or a persistent memory, a volatile memory such as a ram (random Access memory), transistors and resistors.

The electric power tool 1 includes: and a controller case 62 that houses at least a part of the controller 13. The controller case 62 is disposed in the internal space of the controller housing portion 23. At least a part of the controller 13 is housed in the controller case 62.

The controller 13 switches the control mode of the motor 6 based on the operation content of the electric power tool 1. The control modes of the motor 6 refer to: the control method or control mode of the motor 6.

As shown in fig. 1, 4, and 5, the trigger switch 14 is provided on the grip portion 22. The trigger switch 14 is operated by an operator to activate the motor 6. The trigger switch 14 includes a trigger part 14A and a switch circuit 14B. The switch circuit 14B is housed in the grip portion 22. The trigger member 14A projects forward from an upper portion of a front portion of the grip portion 22. The trigger member 14A is operated by an operator. The trigger member 14A is operated to switch between driving and stopping of the motor 6.

As shown in fig. 1, the forward/reverse switching lever 15 is provided above the grip 22. The forward/reverse switching lever 15 is operated by an operator. The rotation direction of the motor 6 is switched from one of the normal rotation direction and the reverse rotation direction to the other by operating the normal/reverse switching lever 15. The rotation direction of the main shaft 8 is switched by switching the rotation direction of the motor 6.

As shown in fig. 1 and 4, the operation panel 16 is provided in the controller housing portion 23. The operation panel 16 is operated by an operator to switch the control mode of the motor 6. The operation panel 16 is plate-shaped. The controller housing portion 23 has an opening 63 in which the operation panel 16 is disposed. The opening 63 is provided on the upper surface of the controller storage 23 at a position forward of the grip 22. At least a part of the operation panel 16 is disposed in the opening 63.

The operation panel 16 includes: a striking force switch 64 and a dedicated switch 65. The striking switch 64 and the dedicated switch 65 are operated by the operator. The control mode of the motor 6 is switched by operating at least one of the striking force switch 64 and the dedicated switch 65.

The mode changeover switch 17 is provided above the trigger member 14A. The mode changeover switch 17 is operated by an operator. The control mode of the motor 6 is switched by operating the mode switching switch 17.

The lamps 18 are disposed on the left and right portions of the motor housing portion 21, respectively. The lamp 18 emits: and an illumination light for illuminating the front side of the electric power tool 1. The lamp 18 comprises, for example, a Light Emitting Diode (LED).

[ operation of electric Power tool ]

Next, the operation of the electric power tool 1 will be described. For example, when a screw fastening operation is performed on a processing object, a tip tool used in the screw fastening operation is inserted into the insertion hole 55 of the anvil 10. The tip end tool inserted into the insertion hole 55 is held by the chuck sleeve 11. After the tip tool is attached to the anvil 10, the operator holds the grip portion 22 and operates the trigger switch 14. When the trigger switch 14 is operated, power is supplied from the battery pack 25 to the motor 6, so that the motor 6 is started. The rotor shaft 32 is rotated by the activation of the motor 6. When the rotor shaft 32 rotates, the rotational force of the rotor shaft 32 is transmitted to the planetary gear 42 via the pinion gear 41. The planetary gear 42 revolves around the pinion gear 41 while rotating while meshing with the internal teeth of the internal gear 43. The planetary gear 42 is rotatably supported by the main shaft 8 via a pin 42P. The main shaft 8 is rotated at a rotational speed lower than that of the rotor shaft 32 by the revolution of the planetary gear 42.

When the main shaft 8 rotates in a state where the hammer projection 59 and the anvil projection 60 are in contact with each other, the anvil 10 rotates together with the hammer 47 and the main shaft 8. The anvil 10 is rotated to perform a screw fastening operation.

When a load of a predetermined value or more acts on the anvil 10 due to the progress of the screw fastening operation, the rotation of the anvil 10 and the hammer 47 is stopped. When the main shaft 8 rotates in a state where the rotation of the hammer 47 is stopped, the hammer 47 moves rearward. By the hammer 47 moving rearward, the contact of the hammer protrusion 59 with the anvil protrusion 60 is released. The hammer 47 moved to the rear moves forward while rotating by the elastic force of the coil spring 49. The hammer 47 moves forward while rotating, and the anvil 10 is struck by the hammer 47 in the rotating direction. Thereby, the anvil 10 is rotated around the rotation axis AX with a high torque. Therefore, the screw is fastened to the processing object with high torque.

[ controller ]

Fig. 10 is a block diagram showing the electric power tool 1 including the controller 13 according to the embodiment. The electric power tool 1 includes: a motor 6, a controller 13, an operating device 66, a notification device 67, and a striking detection device 68.

The controller 13 includes a computer system. The controller 13 switches the control mode of the motor 6 based on the operation content of the electric power tool 1.

The controller 13 has a memory device 69 and a control device 70. The storage 69 includes a nonvolatile memory such as a rom (read Only memory) or a permanent memory. In addition, the storage device 69 may include a volatile memory such as a ram (random Access memory). The control device 70 includes a processor such as a cpu (central Processing unit).

The operation device 66 is operated by an operator. The operation device 66 outputs an operation signal by an operation of an operator. The operating device 66 includes a plurality of switches. The control mode of the motor 6 is set based on the operation signal output from the operation device 66. The control mode of the motor 6 is switched by operating the operation device 66. In an embodiment, the operation device 66 comprises: a striking force switch 64 provided on the operation panel 16; a dedicated switch 65 provided on the operation panel 16; and a mode switch 17 provided above the trigger member 14A.

The notification device 67 has a light emitter 71. The light emitter 71 operates based on the control mode of the motor 6 set by the operation of the operation device 66. The light emitter 71 is provided in plurality. The light emitter 71 includes a plurality of action light emitters 72, and an identification light emitter 73. The action light emitter 72 is provided with 4. The action light emitter 72 includes: first operating light emitter 72A, second operating light emitter 72B, third operating light emitter 72C, and fourth operating light emitter 72D. The identification light emitter 73 is provided with 1. In the embodiment, 5 light emitters 71 are provided.

The hit detection device 68 detects: whether or not the anvil 10 has been struck with the hammer 47. The striking detection means 68 includes a rotation speed sensor that detects the rotation speed of the motor 6. By starting the striking with the hammer 47, the rotation speed of the motor 6 is changed. The striking detection device 68 can detect whether or not the anvil 10 is struck by detecting the rotation speed of the motor 6.

In addition, the striking detection means 68 may include: and a current sensor for detecting the current supplied to the motor 6. By starting striking with the hammer 47, the current supplied to the motor 6 is changed. The striking detection device 68 can detect whether the anvil 10 is struck by detecting the current supplied to the motor 6. The strike detection device 68 may include: a vibration sensor for detecting vibration acting on the power tool 1. By starting the striking with the hammer 47, the amplitude of the vibration acting on the electric power tool 1 is changed. The striking detection device 68 can detect whether or not the anvil 10 is struck by detecting the vibration acting on the power tool 1.

The storage device 69 stores a plurality of control modes of the motor 6. In an embodiment, the control modes include: a plurality of operation modes and a registration mode selected from the plurality of operation modes. The storage device 69 includes: an operation pattern storage unit 74 that stores a plurality of operation patterns, and a registration pattern storage unit 75 that stores a registration pattern.

Control device 70 outputs: a control signal for controlling the motor 6. Control device 70 outputs: a control signal for controlling the notification device 67. The control device 70 includes: a command output unit 76, a motor control unit 77, and a notification control unit 78.

Fig. 11 is a schematic diagram showing an operation of the controller 13 according to the embodiment. As shown in fig. 11, the control mode of the motor 6 includes an operation mode and a storage mode. The operation modes include a plurality of first operation modes and a plurality of second operation modes.

The first action mode is as follows: a striking force pattern indicating a general operation pattern. The second operation mode is as follows: an exclusive mode indicating an operation mode exclusive for the object to be processed. In the following description, the first operation mode is appropriately referred to as a striking force mode, and the second operation mode is appropriately referred to as an exclusive mode.

The striking force mode includes: fastest mode, strong mode, medium mode, and weak mode. The dedicated modes include: wood mode, self-tapping mode, and bolt mode. The self-tapping mode includes: a self-tapping (thin) mode and a self-tapping (thick) mode. The bolt pattern includes: bolt 1 mode, bolt 2 mode, and bolt 3 mode. The storage mode includes a registration mode.

The operation mode storage unit 74 stores a plurality of operation modes (fastest mode, strong mode, medium mode, weak mode, wood mode, self-tapping (thin) mode, self-tapping (thick) mode, bolt 1 mode, bolt 2 mode, and bolt 3 mode). The registration pattern storage unit 75 stores the registration pattern.

The operation pattern storage unit 74 stores 10 kinds of operation patterns. The registration pattern storage unit 75 stores at least one selected operation pattern from the 10 operation patterns as a registration pattern. In the embodiment, the number of registration patterns stored in the registration pattern storage unit 75 is 1. The control modes stored in the storage device 69 are 11.

As described above, the number of the light emitters 71 included in the notification device 67 is 5. The number of control modes stored in the storage device 69 is 11. The notification device 67 has a smaller number of light emitters 71 than the number of control modes.

Command output unit 76 outputs a mode command for setting the control mode based on the operation signal output from operation device 66. The motor 6 is driven based on the set control mode.

Command output unit 76 outputs, based on the operation signal output from operation device 66: a registration command for registering an operation pattern selected from the plurality of operation patterns as a registration pattern in the registration pattern storage unit 75. The registration pattern storage unit 75 stores the selected operation pattern as a registration pattern.

The command output unit 76 outputs a mode command by performing a first operation on the operation device 66. When the first operation is performed on the operation device 66, a first operation signal is output from the operation device 66. The command output unit 76 outputs, based on the first operation signal output from the operation device 66: the mode command for 1 control mode is set from among the 11 control modes stored in the storage device 69.

The instruction output unit 76 outputs a registration instruction by performing a second operation on the operation device 66. When the second operation is performed on the operation device 66, a second operation signal is output from the operation device 66. The command output unit 76 outputs, based on the second operation signal output from the operation device 66: the registration command for 1 operation pattern is registered from among the 10 operation patterns stored in the operation pattern storage unit 74.

That is, by performing the first operation on the operation device 66 and outputting the mode command, 1 control mode specified by the first operation is selected from the 11 control modes stored in the storage device 69. The motor 6 is set to the selected control mode.

By performing the second operation on the operation device 66 and outputting the registration command, 1 operation pattern specified by the second operation is selected from the 10 operation patterns stored in the operation pattern storage unit 74. The registration pattern storage unit 75 stores the selected operation pattern as a registration pattern.

In the following description, the process of registering the operation pattern selected by the registration command as the registration pattern in the registration pattern storage unit 75 is appropriately referred to as a registration process. In the following description, setting the motor 6 to a specific control mode is appropriately referred to as a set control mode. The registration of the selected operation pattern as a registration pattern in the registration pattern storage unit 75 is appropriately referred to as a registration operation pattern. Setting the motor 6 to the registration mode is appropriately referred to as setting to the storage mode.

The first operation includes: 1 of the plurality of switches of the operation device 66 is operated. The second operation includes: at least 2 switches of the plurality of switches of the operating device 66 are operated simultaneously.

In an embodiment, the first operation comprises: at least one of the operation of only the striking-force switch 64, the operation of only the dedicated switch 65, and the operation of only the mode changeover switch 17.

By operating only the striking force switch 64, the command output portion 76 outputs: a mode command for setting a striking force mode. When the mode command is output, 1 striking force mode is selected from the 4 striking force modes stored in the action mode storage unit 74. The motor 6 is set to the selected 1 striking-force mode.

By operating only the dedicated switch 65, the instruction output section 76 is caused to output: a mode command for setting the dedicated mode. When the mode command is output, 1 kind of exclusive mode is selected from the 6 kinds of exclusive modes stored in the operation mode storage section 74. The motor 6 is set to the selected 1 exclusive mode.

By operating only the mode changeover switch 17, the instruction output section 76 is caused to output: a mode command for setting a storage mode. When the pattern command is output, the registration pattern stored in the registration pattern storage section 75 is selected. The motor 6 is set to the storage mode.

The second operation includes: at least one of the simultaneous operation of the striking-force switch 64 and the mode changeover switch 17 and the simultaneous operation of the dedicated switch 65 and the mode changeover switch 17.

The instruction output portion 76 outputs a registration instruction for registering the striking force pattern by operating the striking force switch 64 and the mode changeover switch 17 simultaneously. When the registration command is output, 1 striking force pattern is selected from the 4 striking force patterns stored in the action pattern storage section 74. The selected 1 striking force patterns are registered in the registration pattern storage unit 75.

The instruction output section 76 is caused to output a registration instruction for registering the exclusive mode by operating the exclusive switch 65 and the mode changeover switch 17 simultaneously. When the registration command is output, 1 kind of exclusive mode is selected from the 6 kinds of exclusive modes stored in the operation mode storage section 74. The selected 1 kind of exclusive mode is registered in the registration mode storage unit 75.

The motor control unit 77 outputs a control signal for controlling the motor 6 based on the mode command output from the command output unit 76. The motor control portion 77 controls the motor 6 based on the control mode set by the first operation of the operation device 66.

The notification control unit 78 outputs a control signal for controlling the notification device 67 based on the mode command output from the command output unit 76. The notification control portion 78 controls the notification device 67 based on the control mode set by the first operation of the operation device 66. The notification control section 78 controls each of the plurality of light emitters 71 based on the mode command.

The notification control section 78 outputs a control signal for controlling the notification device 67 based on the registration command output from the command output section 76. The notification control section 78 controls the notification device 67 based on the registration processing performed by the second operation of the operation device 66. The notification control section 78 controls each of the plurality of light emitters 71 based on the registration instruction.

The notification control unit 78 controls the operation modes of the light emitters 71, the number of which is smaller than the number of control modes, so as to notify the setting status of the control modes and the implementation status of the registration processing. The notification control section 78 controls the operation mode of the light emitter 71 so as to notify the set control mode. The notification control section 78 controls the operation mode of the light emitter 71 so as to notify the execution status of the registration process.

When the registration process is performed by the registration command, the notification control unit 78 outputs a control signal so that the light emitter 71 is in the first state. When the storage mode is set by the mode command, the notification control unit 78 outputs a control signal so that the light emitter 71 is in a second state different from the first state.

[ control modes ]

Fig. 12 is a diagram showing the operation panel 16 according to the embodiment. As shown in fig. 12, the operation panel 16 includes: at least a part of the operating device 66, and a notification device 67 having a plurality of light emitters 71. The operation panel 16 is provided with: as the operating device 66, a striking force switch 64 and a dedicated switch 65 are provided, in which the striking force switch 64 is operated to set a striking force mode, and the dedicated switch 65 is operated to set a dedicated mode. Striking force switch 64 is disposed on the right portion of operation panel 16. The dedicated switch 65 is disposed on the left portion of the operation panel 16.

The Light emitter 71 includes a Light Emitting Diode (LED). The plurality of light emitters 71 are arranged with a space therebetween in the left-right direction. The plurality of light emitters 71 are disposed between the striking force switch 64 and the dedicated switch 65 in the left-right direction.

The light emitter 71 includes: an operation light emitter 72 that operates based on the set control mode, and a recognition light emitter 73 that operates to recognize a plurality of operation modes.

The operation light emitter 72 is provided in plurality. The action light emitter 72 includes: first operating light emitter 72A, second operating light emitter 72B, third operating light emitter 72C, and fourth operating light emitter 72D. The 4 operation light emitters 72 are arranged with a space therebetween in the left-right direction.

The recognition light emitter 73 functions as a first recognition light emitter that operates to recognize the striking force mode and the dedicated mode. The recognition light emitter 73 is disposed: to the left of the operation light emitter 72.

The operation panel 16 includes: a first mark 79 provided at least partially around the plurality of operation light emitters 72 and indicating each of the plurality of striking force patterns; and a second mark 80 provided at least partially around the plurality of operation light emitters 72 and indicating each of the plurality of dedicated modes. The operation panel 16 includes a third mark 81 provided at least partially around the plurality of operation light emitters 72 and indicating each of the plurality of dedicated modes.

The first mark 79 is provided to identify a plurality of striking force patterns. The first mark 79 is marked on the surface of the operation panel 16 by, for example, printing. The first mark 79 includes: at least one of a number, a character, a symbol, and an illustration. The first mark 79 includes: a flag 79A indicating weak mode, a flag 79B indicating medium mode, a flag 79C indicating strong mode, and a flag 79D indicating fastest mode. In an embodiment, the label 79A is the number "1". Reference 79B is the number "2". The reference 79C is the number "3". Reference 79D is the number "4".

The first mark 79 is provided at a position corresponding to each of the plurality of operation light emitters 72. The mark 79A is provided behind the first operation light emitter 72A. The mark 79B is provided behind the second operation light emitter 72B. The mark 79C is provided behind the third operation light emitter 72C. The mark 79D is provided behind the fourth operation light emitter 72D.

The first mark 79 is provided in a region 82 including the rear end portion of the operation panel 16. The area 82 is colored with a first color. The first color is, for example, black.

The second mark 80 is provided to identify a plurality of dedicated modes. The second mark 80 is marked on the surface of the operation panel 16 by, for example, printing. The second mark 80 includes: at least one of a number, a character, a symbol, and an illustration. The second mark 80 includes: a mark 80A indicating a wood mode, a mark 80B indicating a self-tapping (thin) mode, a mark 80C indicating a self-tapping (thick) mode, and a mark 80D indicating a bolt mode (bolt 1 mode, bolt 2 mode, bolt 3 mode). In an embodiment, the indicia 80A is the word "wood". The label 80B is the text "thin (テクス)". The label 80C is the text "thick (テクス)". The label 80D is the word "ボルト".

In addition, the second indicia 80 may not be text. The second indicia 80 may be, for example, artwork.

The second mark 80 is provided at a position corresponding to each of the plurality of operation light emitters 72. The mark 80A is provided in front of the first operation light emitter 72A. The mark 80B is provided in front of the second operation light emitter 72B. The mark 80C is provided in front of the third operation light emitter 72C. The mark 80D is provided in front of the fourth operation light emitter 72D.

The second mark 80 is provided in a region 83 including the front end portion of the operation panel 16. The area 83 is colored with a second color different from the first color. The second color is, for example, light blue.

The third mark 81 is provided for identifying a plurality of bolt patterns (bolt 1 pattern, bolt 2 pattern, bolt 3 pattern) as one of the exclusive patterns. The third mark 81 is marked on the surface of the operation panel 16 by, for example, printing. The third mark 81 includes: at least one of a number, a character, a symbol, and an illustration. The third mark 81 includes: a mark 81A indicating a bolt 1 mode, a mark 81B indicating a bolt 2 mode, and a mark 81C indicating a bolt 3 mode. In an embodiment, the label 81A is the number "1". The numeral 81B is a number "2". The label 81C is the number "3".

The third mark 81 is provided at a position corresponding to each of the plurality of operation light emitters 72. Mark 81A is provided in front of first operation light emitter 72A and mark 80A. Mark 81B is provided in front of second operation light emitter 72B and mark 80B. Mark 81C is provided in front of third operation light emitter 72C and mark 80C.

The third mark 81 is provided in a part of the region 83, i.e., the region 84. The region 84 is colored with a third color different from the first color and the second color. The third color is, for example, blue.

A part of the area 82 of the first color is disposed around the striking force switch 64. A part of the area 83 of the second color is arranged around the dedicated switch 65. Since the striking force switch 64 is disposed in the first colored region 82, the operator can visually associate the striking force switch 64 with the first mark 79 for identifying a plurality of striking force patterns. Since the dedicated switch 65 is disposed in the area 83 of the second color, the worker can visually associate the dedicated switch 65 with the second mark 80 for identifying the plurality of dedicated modes.

Fig. 13 is a schematic diagram illustrating a control mode switching method according to the embodiment. The 11 control modes are switched by the first operation of the operation device 66.

In the case of shifting from the exclusive mode to the striking-force mode, the operator presses (or 'presses for a short time') the striking-force switch 64 as indicated by an arrow R1 in fig. 13. When the storage mode is shifted to the striking force mode, the operator presses the striking force switch 64 for a short time as indicated by an arrow R2 in fig. 13. After the shift to the striking force mode, the control mode is switched in the order of the fastest mode, the strong mode, the medium mode, the weak mode, the fastest mode, and … as shown by an arrow R3 in fig. 13 when the striking force switch 64 is pressed once.

When the storage mode is shifted to the exclusive mode, the operator pushes the exclusive switch 65 for a short time as indicated by an arrow R4 in fig. 13. When the striking force mode is shifted to the exclusive mode, the operator presses the exclusive switch 65 for a short time as indicated by an arrow R5 in fig. 13. After the shift to the dedicated mode, the control mode is switched in the order of wood mode, self-tapping (thin) mode, self-tapping (thick) mode, bolt 1 mode, bolt 2 mode, bolt 3 mode, wood mode, and … as indicated by arrow R6 in fig. 13 every time the dedicated switch 65 is pressed for a short time.

When the striking force mode is shifted to the storage mode, the operator presses the mode changeover switch 17 for a short time as indicated by an arrow R7 in fig. 13. When the mode is shifted from the exclusive mode to the storage mode, the operator presses the mode selector switch 17 for a short time as indicated by an arrow R8 in fig. 13.

When the operator shifts from the striking force mode to the storage mode and then shifts to the striking force mode, the operator can shift to the striking force mode by pressing the mode selector switch 17 for a short time as indicated by an arrow R9 in fig. 13.

When the mode is shifted from the exclusive mode to the storage mode and then to the exclusive mode, the operator can shift to the exclusive mode by pressing the mode changing switch 17 for a short time as shown by an arrow R10 in fig. 13.

The registration processing of the specific operation pattern is performed by performing the second operation on the operation device 66.

For example, when 1 striking force mode is registered from among 4 striking force modes (fastest mode, strong mode, medium mode, and weak mode), the operator presses the striking force switch 64 and the mode changeover switch 17 long while setting the striking force mode desired to be registered, as indicated by an arrow R11 in fig. 13. For example, when the strong mode is registered, the operator sets the strong mode by pressing the hitting power switch 64 for a short time. After the strong mode is set, the operator presses the striking force switch 64 and the mode changeover switch 17 for the same time. Thereby, as the registration pattern, the strong pattern is registered.

When registering 1 kind of exclusive mode from among 6 kinds of exclusive modes (wood mode, self-tapping (thin) mode, self-tapping (thick) mode, bolt 1 mode, bolt 2 mode, and bolt 3 mode), the operator presses the exclusive switch 65 and the mode changeover switch 17 long while the exclusive mode desired to be registered is set, as indicated by an arrow R12 in fig. 13. For example, when registering the wood mode, the operator sets the wood mode by pressing the dedicated switch 65 for a short time. After the wood mode is set, the operator presses the dedicated switch 65 and the mode changeover switch 17 for the same time. Thereby, as the registration pattern, the wood pattern is registered.

In the embodiment, the striking force switch 64 functions as an illumination switch for turning on or off the lamp 18. For example, by pressing the striking force switch 64 for a long time, the lamp 18 is turned on or off.

[ control characteristics ]

Fig. 14 is a diagram for explaining control characteristics of the striking force pattern according to the embodiment. In fig. 14, the horizontal axis represents the operation amount of the trigger 14A, and the vertical axis represents the duty ratio of the control signal for driving the motor 6.

As shown in fig. 14, in the striking force mode, the duty ratio of the control signal for driving the motor 6 is changed based on the operation amount of the trigger 14A. The duty ratio of the control signal and the rotation speed of the motor 6 correspond one-to-one. The rotation speed of the motor 6 is changed by changing the duty ratio of the control signal. That is, the rotation speed of the motor 6 is changed based on the operation amount of the trigger 14A. In the example shown in fig. 14, the operation amount of the trigger part 14A is divided into 10 stages of "1" to "10". The larger the operation amount of the trigger part 14A, the larger the duty ratio of the control signal.

In the striking force mode, an upper limit Ma of the duty ratio of the control signal is set. That is, in the striking force mode, the upper limit Ma of the rotation speed of the motor 6 is set. The maximum limit Ma1 of the fastest mode is highest, the maximum limit Ma2 of the strong mode is second highest next to the fastest mode, the maximum limit Ma3 of the medium mode is third highest next to the strong mode, and the maximum limit Ma4 of the weak mode is lowest.

When the operation amount is "10" at the maximum, the motor 6 rotates at the rotation speed of the upper limit value Ma. When the operation amount is "1" which is the minimum, the motor 6 rotates at the rotation speed of the lower limit value Mi. The rotation speed of the lower limit value Mi is the same value in each of the fastest mode, the strong mode, the medium mode, and the weak mode.

In the striking force mode, if the load acting on the anvil 10 increases due to the screw fastening work, the hammer 47 strikes the anvil 10 in the rotational direction.

Fig. 15 is a diagram for explaining the rotation speed of the motor 6 when the hammer 47 strikes the anvil 10 in the rotational direction in the striking force mode according to the embodiment. In fig. 15, the horizontal axis represents time after the start of the screw tightening operation, and the vertical axis represents the rotation speed of the motor 6.

As shown in fig. 15, if the load applied to the motor 6 increases due to the screw tightening operation, the rotation speed of the motor 6 decreases at time ta. At a time tb after the time ta, striking with the hammer 47 is started. When striking with the hammer 47 is started, the load acting on the motor 6 is reduced, and the rotation speed of the motor 6 is changed.

Fig. 16 is a diagram for explaining the control characteristics of the wood pattern according to the embodiment. In fig. 16, the horizontal axis represents time after the start of the screw tightening operation, and the vertical axis represents the rotation speed of the motor 6.

As shown in fig. 16, if the operation of the trigger part 14A is started so that the operation amount of the trigger part 14A increases, the duty ratio of the control signal increases. The duty cycle of the control signal in the wood mode is less than the duty cycle of the control signal in the fastest mode. Immediately after the screw tightening work for the wood is started, it is necessary to slowly rotate the screw so as to make the screw enter the wood. That is, immediately after the start of driving of the motor 6, the rotation speed of the motor 6 needs to be reduced. Since the duty ratio of the control signal in the wood mode is smaller than that in the fastest mode, the screw is slowly rotated.

When the load on the motor 6 increases, the rotation speed of the motor 6 decreases at time ta. At a time tb after the time ta, striking with the hammer 47 is started. The striking detection means 68 detects the number of times of striking of the hammer 47. When it is determined that the number of times of striking by the hammer 47 exceeds the predetermined value based on the detection signal of the striking detection device 68, the motor control unit 77 increases the duty ratio of the control signal at a time tc after the time tb. That is, when the number of times of striking by the hammer 47 exceeds a predetermined value, the motor control unit 77 determines that the screw has entered the wood, and increases the rotation speed of the motor 6. After the screw enters the wood, the rotation speed of the motor 6 is increased, whereby the screw fastening work for the wood is efficiently performed in a short time.

The self-tapping mode is as follows: and an operation mode for fastening the tapping screw to the object to be processed. When the thickness of the object to be processed is large, a self-tapping (thickness) mode is selected. When the thickness of the object to be processed is small, a self-tapping (thin) mode is selected. The worker can arbitrarily select the self-tapping (thick) mode and the self-tapping (thin) mode.

Fig. 17 is a diagram for explaining the control characteristics in the self-tapping (thick) mode according to the embodiment. In fig. 17, the horizontal axis represents time after the start of the screw tightening operation, and the vertical axis represents the rotation speed of the motor 6.

As shown in fig. 17, if the operation of the trigger part 14A is started so that the operation amount of the trigger part 14A increases, the duty ratio of the control signal increases. When the load on the motor 6 increases, the rotation speed of the motor 6 decreases at time ta. At a time tb after the time ta, striking with the hammer 47 is started. The striking detection means 68 detects the number of times of striking of the hammer 47. When it is determined that the number of times of striking by the hammer 47 exceeds the predetermined value based on the detection signal of the striking detection device 68, the motor control unit 77 decreases the duty ratio of the control signal at a time tc after the time tb.

Although not shown, in the self-tapping (thin) mode, the motor control unit 77 stops the driving of the motor 6 when determining that the number of times of striking by the hammer 47 exceeds the predetermined value.

The bolt mode is as follows: and a control mode for performing a bolt fastening operation or a bolt removal operation. In addition, the bolt mode is also selected when the nut is fastened or removed. In the following description, a case where a fastening operation or a removal operation of a bolt is performed will be described.

When the bolt fastening work is performed, the motor 6 rotates in the normal rotation direction. When the bolt removal operation is performed, the motor 6 rotates in the reverse direction.

Fig. 18 is a diagram for explaining control characteristics of a bolt pattern in the bolt fastening operation according to the embodiment. In fig. 18, the horizontal axis represents the operation amount of the trigger 14A, and the vertical axis represents the duty ratio of the control signal for driving the motor 6.

As shown in fig. 18, in the bolt mode, an upper limit Ma of the rotation speed of the motor 6 is set. The upper limit Ma5 for bolt 3 mode is highest, the upper limit Ma6 for bolt 2 mode is second highest next to bolt 3 mode, and the upper limit Ma7 for bolt 1 mode is lowest.

In the bolt mode, the rotation speed of the motor 6 is set to reach the upper limit Ma even if the operation amount of the trigger 14A does not reach "10". That is, in the bolt mode, the rotation speed of the motor 6 is set to reach the upper limit Ma even if the operation amount of the trigger 14A is small.

When the bolt is rotated, a tip tool fitted into the head of the bolt is used. Therefore, the front end tool is less likely to be deviated from the bolt. Therefore, in the bolt mode, the rotation speed of the motor 6 is set to reach the upper limit Ma even if the operation amount of the trigger 14A is small. Thus, the bolt fastening operation is efficiently performed in a short time.

When it is determined that striking with the hammer 47 is started based on the detection signal of the striking detection device 68, the motor control unit 77 stops driving of the motor 6.

Fig. 19 is a diagram for explaining control characteristics of a bolt pattern in the bolt removal operation according to the embodiment. In fig. 19, the horizontal axis represents time after the start of the bolt removal operation, and the vertical axis represents the rotation speed of the motor 6.

In the bolt removal operation, a large load acts on the motor 6 immediately after the start of driving the motor 6. Therefore, at time td immediately after the start of driving of the motor 6, striking by the hammer 47 is started.

When the bolt is loosened by the striking of the hammer 47, the load applied to the motor 6 is reduced. If the load acting on the motor 6 is reduced, the striking with the hammer 47 is ended. From the time te when the striking of the hammer 47 is finished, the rotation speed of the motor 6 is increased. If the predetermined time Tf has elapsed from the time te when the striking by the hammer 47 is completed and the striking cannot be detected, the motor control unit 77 stops the driving of the motor 6 or reduces the rotation speed of the motor 6. By stopping the driving of the motor 6 or reducing the rotation speed of the motor 6, the bolt can be suppressed from falling from the tool.

[ Notification device ]

Next, the operation of the notification device 67 will be described. The notification control section 78 changes the operation modes of the plurality of operation light emitters 72 based on the control mode set in accordance with the mode command. The notification control section 78 changes the operation mode of the recognition light emitter 73 based on the control mode set in accordance with the mode command.

The plurality of light emitters 71 correspond to the set control mode. The specific light emitter 71 corresponding to the control mode is: and a light emitter 71 which is mainly operated to notify the set control mode. The operator can recognize the set control mode by checking the state of the specific light emitter 71 corresponding to the control mode.

In the striking force mode, the specific operation light emitter 72 corresponding to the fastest mode is the fourth operation light emitter 72D. The specific operation light emitter 72 corresponding to the strong mode is the third operation light emitter 72C. The specific operation light emitter 72 corresponding to the middle mode is the second operation light emitter 72B. The specific operating light emitter 72 corresponding to the weak mode is the first operating light emitter 72A.

In the dedicated mode, the specific operation light emitter 72 corresponding to the wood mode is the first operation light emitter 72A. The specific operating light emitter 72 corresponding to the self-tapping (thin) mode is the second operating light emitter 72B. The specific operating light emitter 72 corresponding to the self-tapping (thick) mode is the third operating light emitter 72C. The specific operation light emitters 72 corresponding to the bolt 1 mode are the first operation light emitter 72A and the fourth operation light emitter 72D. The specific operation light emitters 72 corresponding to the bolt 2 mode are the second operation light emitter 72B and the fourth operation light emitter 72D. The specific operation light emitters 72 corresponding to the bolt 3 mode are the third operation light emitter 72C and the fourth operation light emitter 72D.

The operation of the notification device 67 when outputting a mode command will be described with reference to fig. 20 and 21. Fig. 20 is a transition diagram showing a state of the notification device 67 in setting the striking force mode according to the embodiment. Fig. 21 is a transition diagram showing a state of the notification device 67 in setting the dedicated mode according to the embodiment.

In the striking force mode, as shown by an arrow R3 in fig. 13, a mode command is output from the command output unit 76 every short pressing of the striking force switch 64. The striking force mode is switched in the order of fastest mode, strong mode, medium mode, weak mode, fastest mode, ….

In the dedicated mode, as shown by an arrow R6 in fig. 13, every time the dedicated switch 65 is pressed for a short time, a mode command is output from the command output unit 76. The dedicated mode is switched in the order of wood mode, self-tapping (thin) mode, self-tapping (thick) mode, bolt 1 mode, bolt 2 mode, bolt 3 mode, wood mode, ….

As shown in fig. 20, when the striking force mode is set in response to the mode command, the notification control unit 78 controls the recognition light emitter 73 to be in the fifth state. That is, the notification control section 78 controls the recognition light emitter 73 to be in the fifth state in the fastest mode, the strong mode, the medium mode, and the weak mode. In an embodiment, the fifth state comprises a extinguished state. When the fastest mode, the strong mode, the medium mode, and the weak mode are set, the notification control unit 78 controls the recognition light emitter 73 to be turned off.

The recognition light 73 operates to recognize the striking force mode and the dedicated mode. By recognizing that the light emitter 73 is in the off state, the operator can recognize that the striking force pattern is set.

The notification control unit 78 changes the operation modes of the plurality of operation light emitters 72 based on the set striking force modes (the fastest mode, the strong mode, the medium mode, and the weak mode). Thus, the notification device 67 can notify each of the plural striking force patterns.

When the fastest mode is set in response to the mode command, notification control unit 78 controls fourth operation light emitter 72D corresponding to the fastest mode to be in the third state. In an embodiment, the third state comprises a continuous lighting state. When the fastest mode is set, notification control unit 78 causes fourth operation light emitter 72D to light continuously.

When the fastest mode is set, the notification control unit 78 controls not only the fourth operation light emitter 72D to be in the third state (continuous lighting state), but also the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C to be in the third state (continuous lighting state).

When the strong mode is set in response to the mode command, notification control unit 78 controls third operating light emitter 72C corresponding to the strong mode to be in the third state (continuously lit state).

When the strong mode is set, the notification control unit 78 controls not only the third operating light emitter 72C to be in the third state (continuous lighting state), but also the first operating light emitter 72A and the second operating light emitter 72B to be in the third state (continuous lighting state). When the strong mode is set, notification control unit 78 controls fourth operation light emitter 72D to be in the off state.

When the middle mode is set in response to the mode command, the notification control unit 78 controls the second operation light emitter 72B corresponding to the middle mode to be in the third state (continuously lit state).

When the middle mode is set, the notification control unit 78 controls not only the second operation light emitter 72B to be in the third state (continuously lit state) but also the first operation light emitter 72A to be in the third state (continuously lit state). When the middle mode is designated, the notification control unit 78 controls both the third operating light emitter 72C and the fourth operating light emitter 72D to be turned off.

When the weak mode is set in response to the mode command, the notification control unit 78 controls the first operating light emitter 72A corresponding to the weak mode to be in the third state (continuously lit state).

When the weak mode is set, the notification control unit 78 controls the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D to be turned off.

As shown in fig. 21, when the dedicated mode is set in response to the mode command, the notification control unit 78 controls the recognition light emitter 73 to be in a sixth state different from the fifth state. That is, the notification controller 78 controls the recognition light emitter 73 to be in the sixth state in the wood mode, the self-tapping (thin) mode, the self-tapping (thick) mode, the bolt 1 mode, the bolt 2 mode, and the bolt 3 mode. In an embodiment, the sixth state comprises a continuous lighting state. When the wood mode, the self-tapping (thin) mode, the self-tapping (thick) mode, the bolt 1 mode, the bolt 2 mode, and the bolt 3 mode are set, the notification control section 78 controls the recognition light emitters 73 to be continuously lit.

The recognition light 73 operates to recognize the striking force mode and the dedicated mode. By recognizing that the light emitter 73 is continuously turned on, the operator can recognize that the dedicated mode is set.

The notification control unit 78 changes the operation modes of the plurality of operation light emitters 72 based on the set dedicated modes (wood mode, self-tapping (thin) mode, self-tapping (thick) mode, bolt 1 mode, bolt 2 mode, and bolt 3 mode). Thereby, the notification device 67 can notify the plurality of dedicated modes, respectively.

When the wood mode is set in response to the mode command, the notification control unit 78 controls the first operation light emitter 72A corresponding to the wood mode to be in the third state (continuously lit state).

When the wood mode is set, the notification control unit 78 controls the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D to be turned off.

When the self-tapping (thin) mode is set in response to the mode command, notification control unit 78 controls second operating light emitter 72B corresponding to the self-tapping (thin) mode to be in the third state (continuously lit state).

When the self-tapping (thin) mode is set, notification control unit 78 controls first operation light emitter 72A, third operation light emitter 72C, and fourth operation light emitter 72D to be turned off.

When the self-tapping (thickness) mode is set in response to the mode command, notification control unit 78 controls third operation light emitter 72C corresponding to the self-tapping (thickness) mode to be in the third state (continuously lit state).

When the self-tapping (thick) mode is set, notification control unit 78 controls first operation light emitter 72A, second operation light emitter 72B, and fourth operation light emitter 72D to be turned off.

When the bolt 1 mode is set in response to the mode command, the notification control unit 78 controls both the first operating light emitter 72A and the fourth operating light emitter 72D corresponding to the bolt 1 mode to be in the third state (continuously lit state).

When the bolt 1 mode is set, the notification control unit 78 controls the second operation light emitter 72B and the third operation light emitter 72C to be turned off.

When the bolt 2 mode is set in response to the mode command, the notification control unit 78 controls the second operating light emitter 72B and the fourth operating light emitter 72D corresponding to the bolt 2 mode to be in the third state (continuously lit state).

When the bolt 2 mode is set, the notification control unit 78 controls both the first operating light emitter 72A and the third operating light emitter 72C to be in the off state.

When the bolt 3 mode is set in response to the mode command, the notification control unit 78 controls the third operating light emitter 72C and the fourth operating light emitter 72D corresponding to the bolt 3 mode to be in the third state (continuously lit state).

When the bolt 3 mode is set, the notification control unit 78 controls both the first operating light emitter 72A and the second operating light emitter 72B to be turned off.

As shown in fig. 21, in the exclusive mode, the fourth operation light emitter 72D functions as a second recognition light emitter that operates to recognize a plurality of exclusive modes. The wood mode, the self-tapping (thin) mode, and the self-tapping (thick) mode, and the bolt mode (bolt 1 mode, bolt 2 mode, and bolt 3 mode) can be recognized by a combination of the state of the recognition light emitter 73 (first recognition light emitter) and the state of the fourth operation light emitter 72D (second recognition light emitter).

In the exclusive mode, the operator can recognize that the set exclusive mode is not the bolt mode (bolt 1 mode, bolt 2 mode, bolt 3 mode) by recognizing that the light emitter 73 is in the sixth state (continuously lit state) and the fourth operation light emitter 72D is in the fifth state (extinguished state). When the recognition light emitter 73 is in the continuously lit state and the fourth operation light emitter 72D is in the extinguished state, the worker can recognize that any one of the wood mode, the self-tapping (thin) mode, and the self-tapping (thick) mode is set by any one of the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C being in the third state (continuously lit state).

In the exclusive mode, the operator can recognize that the set exclusive mode is the bolt mode (bolt 1 mode, bolt 2 mode, bolt 3 mode) by recognizing that the light emitter 73 is in the sixth state (continuously lit state) and the fourth operation light emitter 72D is in the sixth state (continuously lit state). When both the recognition light emitter 73 and the fourth operation light emitter 72D are in the continuous lighting state, the operator can recognize that any one of the bolt 1 mode, the bolt 2 mode, and the bolt 3 mode is set by any one of the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C being in the third state (continuous lighting state).

In the embodiment, the fifth state is a turned-off state, and the sixth state is a continuously lit state. For example, it may be: the fifth state is a continuous lighting state, and the sixth state is a turning-off state.

Next, the operation of the notification device 67 when outputting the registration command will be described with reference to fig. 22 to 31. Fig. 22 is a transition diagram showing the state of the notification device 67 in the fastest mode registration processing and storage mode setting according to the embodiment. Fig. 23 is a transition diagram showing the state of the notification device 67 in the strong mode registration processing and the storage mode setting according to the embodiment. Fig. 24 is a transition diagram showing the state of the notification device 67 in the middle mode registration processing and the setting of the storage mode according to the embodiment. Fig. 25 is a transition diagram showing the state of the notification device 67 in the weak pattern registration processing and the setting of the storage pattern according to the embodiment. Fig. 26 is a transition diagram showing the state of the notification device 67 in the registration processing of the wood pattern and the setting of the storage pattern according to the embodiment. Fig. 27 is a transition diagram showing a state of the notification device 67 in the self-tapping (thin) mode registration processing and the setting of the storage mode according to the embodiment. Fig. 28 is a transition diagram showing the state of the notification device 67 in the registration processing of the self-tapping (thick) mode and the setting of the storage mode according to the embodiment. Fig. 29 is a transition diagram showing the state of the notification device 67 in the registration process of the bolt 1 mode and the setting of the storage mode according to the embodiment. Fig. 30 is a transition diagram showing the state of the notification device 67 in the registration process of the bolt 2 pattern and the setting of the storage pattern according to the embodiment. Fig. 31 is a transition diagram showing the state of the notification device 67 in the registration process of the bolt 3 pattern and the setting of the storage pattern according to the embodiment.

When the striking force mode is registered, as shown by an arrow R11 in fig. 13, the striking force switch 64 and the mode changeover switch 17 are simultaneously pressed long in a state where the striking force mode desired to be registered is set. When the storage mode including the striking force mode is set, the mode selector switch 17 is pressed for a short time as indicated by an arrow R7 in fig. 13.

When the exclusive mode is registered, as shown by an arrow R12 in fig. 13, the exclusive switch 65 and the mode switching switch 17 are simultaneously pressed long in a state where the exclusive mode desired to be registered is set. When the storage mode including the exclusive mode is set, the mode selector switch 17 is pressed for a short time as indicated by an arrow R8 in fig. 13.

When the registration process is performed, the notification control section 78 controls the light emitter 71 to be in the first state. When the storage mode is set, the notification control unit 78 controls the light emitter 71 to be in the second state.

The first state includes causing a specific light emitter 71 corresponding to the registration mode to perform the first blinking. The second state includes: the specific light emitter 71 corresponding to the registration mode is made to perform the second blinking. In an embodiment, the first scintillation is: a particular light emitter 71 flashes at a first time interval. The second flicker is: the specific light emitter 71 blinks at a second time interval longer than the first time interval. That is, the first flicker is a high-speed flicker. The second scintillation is a low-speed scintillation.

As shown in fig. 22, 23, 24, and 25, in the registration processing of the striking force pattern and the setting of the storage pattern, the notification control section 78 controls the recognition light emitter 73 to be in the off state.

As shown in fig. 22, in the case where the fastest mode registration process is performed, the fastest mode is set. When the fastest mode is set, the notification control unit 78 controls the first operation light emitter 72A, the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D to be in the third state (continuously lit state).

After the fastest mode is set, the hitting force switch 64 and the mode changeover switch 17 are pressed long at the same time, whereby the registration processing of the fastest mode is started. In the registration process, the notification control unit 78 controls the fourth operation light emitter 72D corresponding to the fastest mode to be in the first state (high-speed blinking state). The notification control unit 78 controls the first operating light emitter 72A, the second operating light emitter 72B, and the third operating light emitter 72C to be turned off.

When the storage mode including the fastest mode is set, notification control unit 78 controls fourth operation light emitter 72D corresponding to the fastest mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the first operating light emitter 72A, the second operating light emitter 72B, and the third operating light emitter 72C to be continuously lit.

As shown in fig. 23, when the strong mode registration process is performed, the strong mode is set. When the strong mode is set, the notification control unit 78 controls the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C to be in the third state (continuously lit state).

After the strong mode is set, the impact switch 64 and the mode changeover switch 17 are simultaneously pressed for a long time, whereby the registration processing of the strong mode is started. In the registration process, the notification control unit 78 controls the third operation light emitter 72C corresponding to the strong mode to be in the first blinking state (high-speed blinking state). The notification control unit 78 controls the first operating light emitter 72A, the second operating light emitter 72B, and the fourth operating light emitter 72D to be turned off.

When the storage mode including the strong mode is set, the notification control unit 78 controls the third operation light emitter 72C corresponding to the strong mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the first operating light emitter 72A and the second operating light emitter 72B to be continuously lit.

As shown in fig. 24, when the in-mode registration process is performed, the in-mode is set. When the middle mode is set, the notification control unit 78 controls both the first operating light emitter 72A and the second operating light emitter 72B to be in the third state (continuous lighting state).

After the middle mode is set, the hitting force switch 64 and the mode switching switch 17 are simultaneously pressed for a long time, and thereby the registration processing of the middle mode is started. In the registration process, the notification control section 78 controls the second operation light emitter 72B corresponding to the middle mode to be in the first state (high-speed blinking state). The notification control unit 78 controls the first operating light emitter 72A, the third operating light emitter 72C, and the fourth operating light emitter 72D to be turned off.

When the storage mode including the middle mode is set, the notification control unit 78 controls the second operation light emitter 72B corresponding to the middle mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the first operating light emitter 72A to be continuously turned on.

As shown in fig. 25, when the registration processing of the weak mode is performed, the weak mode is set. When the weak mode is set, the notification control unit 78 controls the first operating light emitter 72A to be in the third state (continuously lit state).

After the weak mode is set, the impact switch 64 and the mode changeover switch 17 are simultaneously pressed for a long time, whereby the registration processing of the weak mode is started. In the registration process, the notification control section 78 controls the first operation light emitter 72A corresponding to the weak mode to be in the first state (high-speed blinking state). The notification control unit 78 controls the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D to be turned off.

When the storage mode including the weak mode is set, the notification control unit 78 controls the first operation light emitter 72A corresponding to the weak mode to be in the second state (low-speed blinking state).

In this way, when the registration processing of the striking force pattern is performed, the specific light emitter 71 corresponding to the registration pattern is controlled to be in the first state (high-speed blinking state), and when the memory pattern is set in accordance with the pattern command, the specific light emitter 71 corresponding to the memory pattern is controlled to be in the second state (low-speed blinking state) different from the first state. This allows the operator to recognize whether or not the registration process is performed. In addition, the operator can recognize whether or not the storage mode is set.

When the operation mode is set in response to the mode command, the notification control unit 78 controls the specific light emitter 71 corresponding to the set operation mode to be in the third state (continuously lit state), and when the storage mode is set in response to the mode command, the notification control unit 78 controls the specific light emitter 71 corresponding to the set storage mode to be in the fourth state (low-speed blinking state).

For example, as described with reference to fig. 20, when the fastest mode is set in response to the mode command, the fourth operation light emitter 72D corresponding to the fastest mode is controlled to be in the third state (continuously lit state). As described with reference to fig. 22, when the storage mode including the fastest mode is set in response to the mode command, the fourth operation light emitter 72D corresponding to the storage mode (fastest mode) is controlled to be in the fourth state (low-speed blinking state). Thus, the operator can recognize whether the set fastest mode is the operation mode or the storage mode.

Similarly, when the strong mode is set in response to the mode command, the third operating light emitter 72C corresponding to the strong mode is controlled to be in the third state (continuously lit state), and when the memory mode including the strong mode is set in response to the mode command, the third operating light emitter 72C corresponding to the memory mode (strong mode) is controlled to be in the fourth state (low-speed blinking state). The same applies to the medium mode and the weak mode. The operator can recognize whether the set striking force mode is the operation mode or the storage mode.

The second state and the fourth state may be the same state or different states. The third state and the fourth state may be different.

As shown in fig. 26, 27, 28, 29, 30, and 31, in the registration process of the exclusive mode, the notification control section 78 controls the recognition light emitter 73 to be in the seventh state. In addition, in the setting of the storage mode including the dedicated mode, the notification control section 78 controls the recognition light emitter 73 to be in the eighth state. The seventh state and the eighth state are different. In an embodiment, the seventh state is a high speed blinking state. The eighth state is a continuous lighting state.

As shown in fig. 26, when the registration processing of the wood pattern is performed, the wood pattern is set. When the wood mode is set, the notification control section 78 controls the first operation light emitter 72A to be in the third state (continuously lit state).

After the wood pattern is set, the dedicated switch 65 and the pattern changeover switch 17 are simultaneously pressed long, whereby the registration processing of the wood pattern is started. In the registration process, the notification control section 78 controls the first operation light emitter 72A corresponding to the wood pattern to be in the first state (high-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the seventh state (high-speed blinking state). The notification control unit 78 controls the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D to be turned off.

When the storage mode including the wood mode is set, the notification control portion 78 controls the first operation light emitter 72A corresponding to the wood mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the eighth state (continuously lit state).

As shown in fig. 27, when the registration processing of the self-tapping (thinning) mode is performed, the self-tapping (thinning) mode is set. When the self-tapping (thin) mode is set, notification control unit 78 controls second operating light emitter 72B to be in the third state (continuously lit state).

After the self-tapping (thin) mode is set, the registration processing of the self-tapping (thin) mode is started by simultaneously long-pressing the dedicated switch 65 and the mode switching switch 17. In the registration process, the notification control unit 78 controls the second operation light emitter 72B corresponding to the self-tapping (thin) mode to be in the first state (high-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the seventh state (high-speed blinking state). The notification control unit 78 controls the first operating light emitter 72A, the third operating light emitter 72C, and the fourth operating light emitter 72D to be turned off.

When the storage mode including the self-tapping (thinning) mode is set, the notification controller 78 controls the second operation light emitter 72B corresponding to the self-tapping (thinning) mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the eighth state (continuously lit state).

As shown in fig. 28, when the registration processing of the self-tapping (thickness) mode is performed, the self-tapping (thickness) mode is set. When the self-tapping (thick) mode is set, notification control unit 78 controls third operating light emitter 72C to be in the third state (continuously lit state).

After the self-tapping (thick) mode is set, the registration processing of the self-tapping (thick) mode is started by long-pressing the dedicated switch 65 and the mode switching switch 17 at the same time. In the registration process, the notification control unit 78 controls the third operation light emitter 72C corresponding to the self-tapping (thick) mode to be in the first state (high-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the seventh state (high-speed blinking state). The notification control unit 78 controls the first operating light emitter 72A, the second operating light emitter 72B, and the fourth operating light emitter 72D to be turned off.

When the storage mode including the self-tapping (thick) mode is set, the notification controller 78 controls the third operation light emitter 72C corresponding to the self-tapping (thick) mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the eighth state (continuously lit state).

As shown in fig. 29, when the registration process of the bolt 1 mode is performed, the bolt 1 mode is set. When the bolt 1 mode is set, the notification control unit 78 controls both the first operating light emitter 72A and the fourth operating light emitter 72D to be in the third state (continuously lit state).

After the bolt 1 mode is set, the dedicated switch 65 and the mode changeover switch 17 are simultaneously pressed for a long time, whereby the registration processing of the bolt 1 mode is started. In the registration process, the notification control unit 78 controls the first operation light emitter 72A corresponding to the bolt 1 mode to be in the first state (high-speed blinking state). The notification control unit 78 controls the fourth operation light emitter 72D functioning as the second recognition light emitter to be in the seventh state (high-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the seventh state (high-speed blinking state). The notification control unit 78 controls both the second operating light emitter 72B and the third operating light emitter 72C to be turned off.

When the storage mode including the bolt 1 mode is set, the notification control unit 78 controls the first operation light emitter 72A corresponding to the bolt 1 mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the fourth operation light emitter 72D functioning as the second recognition light emitter to be in the eighth state (continuously lit state). The notification control unit 78 controls the recognition light emitter 73 to be in the eighth state (continuously lit state).

As shown in fig. 30, when the registration process of the bolt 2 mode is performed, the bolt 2 mode is set. When the bolt 2 mode is set, the notification control unit 78 controls the second operating light emitter 72B and the fourth operating light emitter 72D to be in the third state (continuously lit state).

After the bolt 2 mode is set, the dedicated switch 65 and the mode changeover switch 17 are simultaneously pressed long, whereby the registration processing of the bolt 2 mode is started. In the registration process, the notification control unit 78 controls the second operation light emitter 72B corresponding to the bolt 2 mode to be in the first state (the first blinking state, the high-speed blinking state). The notification control unit 78 controls the fourth operation light emitter 72D functioning as the second recognition light emitter to be in the seventh state (high-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the seventh state (high-speed blinking state). The notification control unit 78 controls both the first operating light emitter 72A and the third operating light emitter 72C to be turned off.

When the storage mode including the bolt 2 mode is set, the notification control portion 78 controls the second operation light emitter 72B corresponding to the bolt 2 mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the fourth operation light emitter 72D functioning as the second recognition light emitter to be in the eighth state (continuously lit state). The notification control unit 78 controls the recognition light emitter 73 to be in the eighth state (continuously lit state).

As shown in fig. 31, when the registration process of the bolt 3 mode is performed, the bolt 3 mode is set. When the bolt 3 mode is set, the notification control unit 78 controls the third operating light emitter 72C and the fourth operating light emitter 72D to be in the third state (continuously lit state).

After the bolt 3 mode is set, the dedicated switch 65 and the mode changeover switch 17 are simultaneously pressed long, whereby the registration processing of the bolt 3 mode is started. In the registration process, the notification control section 78 controls the third operation light emitter 72C corresponding to the bolt 3 mode to be in the first state (high-speed blinking state). The notification control unit 78 controls the fourth operation light emitter 72D functioning as the second recognition light emitter to be in the seventh state (high-speed blinking state). The notification control unit 78 controls the recognition light emitter 73 to be in the seventh state (high-speed blinking state). The notification control unit 78 controls both the first operating light emitter 72A and the second operating light emitter 72B to be turned off.

When the storage mode including the bolt 3 mode is set, the notification control portion 78 controls the third operation light emitter 72C corresponding to the bolt 3 mode to be in the second state (low-speed blinking state). The notification control unit 78 controls the fourth operation light emitter 72D functioning as the second recognition light emitter to be in the eighth state (continuously lit state). The notification control unit 78 controls the recognition light emitter 73 to be in the eighth state (continuously lit state).

In this way, when the registration processing of the dedicated mode is performed, control is performed so that the specific light emitter 71 corresponding to the registration mode is in the first state (high-speed blinking state), and when the storage mode is set in accordance with the mode command, control is performed so that the specific light emitter 71 corresponding to the storage mode is in the second state (low-speed blinking state) different from the first state. This allows the operator to recognize whether or not the registration process is performed. In addition, the operator can recognize whether or not the storage mode is set.

When the operation mode is set in response to the mode command, the notification control unit 78 controls the specific light emitter 71 corresponding to the set operation mode to be in the third state (continuously lit state), and when the storage mode is set in response to the mode command, the notification control unit 78 controls the specific light emitter 71 corresponding to the set storage mode to be in the fourth state (low-speed blinking state).

For example, as described with reference to fig. 21, when the wood mode is set in response to the mode command, the first operating light emitter 72A corresponding to the wood mode is controlled to be in the third state (continuously lit state). As described with reference to fig. 26, when the memory mode including the wood mode is set in response to the mode command, the first operation light emitter 72A corresponding to the memory mode (wood mode) is controlled to be in the fourth state (low-speed blinking state). This allows the operator to recognize whether the set wood pattern is the operation pattern or the storage pattern.

Similarly, when the self-tapping (thin) mode is set in response to the mode command, control is performed such that the specific second operating light emitter 72B corresponding to the self-tapping (thin) mode is in the third state (continuously lit state), and when the storage mode including the self-tapping (thin) mode is set in response to the mode command, control is performed such that the specific second operating light emitter 72B corresponding to the storage mode (self-tapping (thin) mode) is in the fourth state (low-speed blinking state). The same applies to the self-tapping (thickness) mode, the bolt 1 mode, the bolt 2 mode, and the bolt 3 mode. The operator can recognize whether the set exclusive mode is the operation mode or the storage mode.

[ deformation inhibiting Member ]

Fig. 32 is an enlarged sectional view of a lower portion of the electric power tool 1 according to the embodiment. Fig. 33 is an enlarged sectional view of a lower portion of the electric power tool 1 according to the embodiment. As shown in fig. 4, 32, and 33, the controller housing portion 23 houses the controller 13 and the controller case 62.

The controller case 62 includes a bottom plate 62A and a wall plate 62B, and the wall plate 62B projects upward from a peripheral edge portion of the bottom plate. The bottom plate 62A has a rectangular outer shape. The wall plate 62B includes: a front side wall plate 62Bf projecting upward from a front end portion of the bottom plate 62A; a rear side wall plate 62Bb projecting upward from the rear end of the bottom plate 62A; a left side wall plate 62Bl projecting upward from a left end portion of the bottom plate 62A; and a right side wall plate 62Br projecting upward from the right end of the bottom plate 62A.

An opening is provided in an upper portion of the controller case 62. At least a part of the controller 13 is housed inside the controller case 62 through the opening of the controller case 62.

The electric power tool 1 includes a deformation suppressing member 85, and the deformation suppressing member 85 is disposed at the boundary portion 2C between the grip portion 22 and the controller housing portion 23 or in the vicinity of the boundary portion 2C. The controller housing portion 23 is connected to the lower end portion of the grip portion 22. The boundary portion 2C includes at least one of a lower end portion of the grip portion 22 and an upper end portion of the controller housing portion. The deformation suppressing member 85 suppresses deformation of the housing 2.

As described above, the housing 2 is made of synthetic resin. The rigidity of the deformation suppressing member 85 is higher than that of the housing 2. The deformation suppressing member 85 is made of metal. In the embodiment, the deformation suppressing member 85 is made of iron. In addition, the deformation inhibiting member 85 may be made of aluminum. In addition, the deformation suppressing member 85 may be made of carbon.

The deformation suppressing member 85 is a plate shape long in the left-right direction. In a cross section parallel to the rotation axis AX and orthogonal to the upper surface of the operation panel 16, the deformation inhibiting member 85 has a rectangular outer shape. In the left-right direction, the dimension of the deformation inhibiting member 85 is larger than the dimension of the outer shape of the grip portion 22.

The deformation suppressing member 85 is disposed above the internal space of the controller accommodating portion 23. The deformation suppressing member 85 is connected to the inner surface of the housing 2 at the boundary portion 2C. The deformation inhibiting member 85 supports the housing 2 from the inside.

The deformation suppressing member 85 is disposed above the controller 13. The deformation suppressing member 85 is disposed above the controller case 62. At least a part of the deformation suppressing member 85 is disposed above the wall plate 62B.

In the left-right direction, the size of the deformation inhibiting member 85 and the size of the controller case 62 are substantially equal. In addition, the size of the deformation inhibiting member 85 may be larger than the size of the controller case 62 in the left-right direction. As shown in fig. 33, the left end portion of the deformation inhibiting member 85 is disposed above the left side wall plate 62Bl of the controller case 62. The right end of the deformation inhibiting member 85 is disposed above the right side wall plate 62Br of the controller case 62.

Fig. 34 is an enlarged cross-sectional view of a part of the deformation suppressing member 85 and the controller case 62 according to the embodiment. Fig. 34 corresponds to an enlarged view of a portion a of fig. 33.

As shown in fig. 34, the end portion of the deformation inhibiting member 85 is disposed above the upper end portion of the wall plate 62B in the left-right direction. The electric power tool 1 includes a cushion 86, and the cushion 86 is disposed between the lower surface of the deformation inhibiting member 85 and the upper end of the wall plate 62B. The cushion layer 86 is disposed between the left end of the deformation inhibiting member 85 and the upper end of the left side wall plate 62 Bl. The cushion layer 86 is disposed between the right end portion of the deformation inhibiting member 85 and the upper end portion of the right side wall plate 62 Br.

The buffer layer 86 includes at least a part of the controller accommodating portion 23 of the housing 2. At least a portion of the inner surface of the controller accommodating portion 23 protrudes toward the center of the inner space of the controller accommodating portion 23. Between the deformation suppressing member 85 and the upper end portion of the wall plate 62B, there are interposed: a protrusion protruding from an inner surface of the controller accommodating portion 23.

As described above, the housing 2 is made of synthetic resin such as nylon. The cushion layer 86 is made of synthetic resin.

In addition, the buffer layer 86 may be another member different from the case 2. In addition, cushioning layer 86 may be formed of rubber or Thermoplastic Elastomers (TPE).

As shown in fig. 4, 33, and 34, the terminal box 5A is held in the controller housing portion 23. The terminal block 5A has a tool-side terminal 5B. The tool-side terminal 5B contacts a battery terminal of the battery pack 25. The tool-side terminal 5B is connected to the controller 13 via a lead. The battery pack 25 supplies power to the controller 13 via the tool-side terminal 5B and the lead.

Further, the controller housing portion 23 includes: a panel holding portion 23C, a front side case holding portion 23D, a front side cassette holding portion 23E, a rear side cassette holding portion 23F, a lateral case holding portion 23A, a contact portion 23G, and a lateral cassette holding portion 23B.

The panel holding portion 23C holds the front portion of the operation panel 16 from below. The front side case holding portion 23D holds the front portion of the controller case 62 from the lower side. The front-side junction box holding portion 23E holds the front portion of the junction box 5A from the lower side. The rear-side junction box holding portion 23F is fitted into a recess provided at a lower portion of the rear portion of the junction box 5A. The contact portion 23G contacts at least a part of the upper surface of the deformation suppressing member 85. The lateral casing holding portion 23A holds the left side wall plate 62Bl and the right side wall plate 62Br from below. The lateral terminal block holding portions 23B hold the left and right end portions of the terminal block 5A from below, respectively.

Fig. 35 is a perspective view showing the operation panel 16 and the deformation suppressing member 85 according to the embodiment. Fig. 36 is a side view showing the operation panel 16 and the deformation suppressing member 85 according to the embodiment. As shown in fig. 35 and 36, the deformation suppressing member 85 is fixed to the operation panel 16.

The deformation suppressing member 85 and the operation panel 16 are connected by a connecting portion 87. The connecting portion 87 is made of synthetic resin. The connecting portion 87 is integrally formed with the operation panel 16. The connecting portion 87 is disposed at least partially around the deformation inhibiting member 85. In the embodiment, the connection portion 87 is connected to the upper surface and the rear surface of the deformation suppressing member 85. The deformation suppressing member 85 is fixed to the connecting portion 87. The connection portion 87 may be connected to the front surface of the deformation suppressing member 85, or may be connected to the lower surface of the deformation suppressing member 85.

The base material of the operation panel 16 and the connecting portion 87 are manufactured by, for example, injection molding. The operation panel 16 and the connecting portion 87 are integrally molded by injecting a synthetic resin into the inside of the mold in a state where the deformation suppressing member 85 is disposed inside the mold, and the connecting portion 87 is fixed to the deformation suppressing member 85.

The operation panel 16 and the deformation suppressing member 85 may be fixed by, for example, bolts, or may be connected by an adhesive.

As shown in fig. 32, the connecting portion 87 is in contact with the inner surface of the housing 2 at the boundary portion 2C. The deformation suppressing member 85 is connected to the inner surface of the housing 2 at the boundary portion 2C via a connecting portion 87. The deformation suppressing member 85 supports the housing 2 from the inside via the connecting portion 87.

The controller housing portion 23 has: an opening 63 for the operation panel 16. The opening 63 is provided forward of the grip portion 22 and on the upper surface of the controller housing portion 23. The opening 63 is provided in front of the boundary portion 2C.

The deformation suppressing member 85 is disposed at least partially around the opening 63. As shown in fig. 32, at least a part of the deformation inhibiting member 85 is disposed between the boundary portion 2C and the opening 63 in the front-rear direction.

The deformation suppressing member 85 suppresses deformation of the housing 2 at the boundary portion 2C. By suppressing the deformation of the housing 2, the controller 13 and peripheral components of the controller 13 can be suppressed from being damaged.

Fig. 37 is a schematic diagram showing a state in which an external force acts on the electric power tool 1J according to the comparative example. The electric power tool 1J according to the comparative example does not have the deformation inhibiting member 85. If the electric power tool 1J receives an external force due to the fall, at least a part of the housing 2 may be deformed. The boundary portion 2C between the grip portion 22 and the controller housing portion 23 is curved. Therefore, if the electric power tool 1J receives an external force, the boundary portion 2C is highly likely to be deformed. If the housing 2 deforms and bends at the boundary portion 2C, the inner surface of the housing 2 may come into contact with at least one of the controller 13 and peripheral components of the controller 13. As a result, at least one of the controller 13 and peripheral components of the controller 13 may be damaged. Further, as peripheral parts of the controller 13, parts housed in the controller housing section 23 can be exemplified.

Fig. 38 is a schematic diagram showing a state in which an external force acts on the electric power tool 1 according to the embodiment. The electric power tool 1 according to the embodiment includes the deformation inhibiting member 85 provided at the boundary portion 2C. Therefore, the case 2 is suppressed from being deformed at the boundary portion 2C or in the vicinity of the boundary portion 2C.

Fig. 39 is a schematic view of a deformation suppressing member 85 according to an embodiment. As shown in fig. 39, the left end portion of the deformation inhibiting member 85 is disposed above the left side wall plate 62Bl of the controller case 62. The right end of the deformation inhibiting member 85 is disposed above the right side wall plate 62Br of the controller case 62. The deformation inhibiting member 85 is configured to: mounted on the left side wall plate 62Bl and the right side wall plate 62 Br. In the example shown in fig. 39, the deformation inhibiting member 85 is in direct contact with each of the left wall plate 62Bl and the right wall plate 62 Br.

The deformation inhibiting member 85 is configured to: a part of the opening of the upper portion of the controller case 62 is covered. Therefore, even if deformation occurs such that the inner surface of the housing 2 comes close to the controller 13, the inner surface of the housing 2 comes into contact with the deformation inhibiting member 85 before coming into contact with the controller 13. Therefore, the inner surface of the housing 2 can be suppressed from contacting the controller 13. Therefore, the controller 13 is sufficiently protected, and breakage of the controller 13 can be suppressed. In addition, damage to peripheral components of the controller 13 can be suppressed.

[ Fan ]

Next, the fan 12 will be explained. As shown in fig. 4 and 5, fan 12 is fixed to at least a part of rotor 27. Fan 12 is fixed to rotor shaft 32 of rotor 27. The fan 12 is rotated together with the rotor shaft 32 by the rotation of the rotor shaft 32. The fan 12 rotates about the rotation axis AX. The fan 12 is disposed behind the motor 6.

Fig. 40 is a perspective view of fan 12 according to the embodiment as viewed from the front. Fig. 41 is a perspective view of fan 12 according to the embodiment as viewed from the rear. Fig. 42 is a sectional view showing fan 12 according to the embodiment.

The fan 12 is a centrifugal fan. The fan 12 has: a main plate portion 88; a cylindrical portion 89 protruding forward from the central portion of the main plate portion 88; a plurality of blade portions 91 disposed around the cylindrical portion 89; and an annular baffle portion 90 disposed in front of the blade portion 91.

The main plate portion 88 has a circular plate shape. The main plate portion 88 is disposed behind the blade portion 91. An opening in which the rotor shaft 32 is disposed is provided in the central portion of the main plate portion 88. The opening of the main plate portion 88 is connected to the space inside the tube portion 89. The rotor shaft 32 is inserted into the space inside the cylindrical portion 89.

A plurality of blade portions 91 are provided around the cylindrical portion 89 at intervals. The main plate portion 88 is connected to the rear surface of the blade portion 91. The front surface of the blade 91 includes: an inner portion 91A extending radially outward from the front portion of the tube portion 89, and an outer portion 91B disposed radially outward of the inner portion 91A. The outer portion 91B is provided: and is recessed rearward of the inner portion 91A. The outer portion 91B is disposed: further rearward than the surface 90A of the shutter portion 90.

The tube portion 89 is disposed inside the baffle portion 90. The bush 61 is disposed inside the tube portion 89.

The baffle portion 90 is disposed: further forward than the main plate portion 88. The baffle portion 90 is annular. The baffle portion 90 is plate-shaped. The center of the baffle portion 90 and the center of the cylindrical portion 89 coincide with the rotation axis AX. The baffle portion 90 is connected to a peripheral edge portion of the front surface of the blade portion 91.

The inner diameter Da of the baffle portion 90 is larger than the outer diameter Db of the main plate portion 88. The baffle portion 90 and the main plate portion 88 do not overlap in a plane orthogonal to the rotation axis AX. The inner diameter Da of the baffle portion 90 may be equal to the outer diameter Db of the main plate portion 88.

In a state where fan 12 is fixed to rotor shaft 32, baffle portion 90 faces at least a portion of stator 26. The baffle portion 90 includes: a front surface 90A facing forward, and a back surface 90B facing in the opposite direction of the front surface 90A, i.e., rearward. In a state where fan 12 is fixed to rotor shaft 32, surface 90A faces at least a portion of stator 26.

The face 90A and the back 90B are parallel. The front surface 90A and the back surface 90B are flat. In the embodiment, the baffle portion 90 is a parallel flat plate. In a state where fan 12 is fixed to rotor shaft 32, front surface 90A and rear surface 90B are orthogonal to rotation axis AX, respectively.

Fig. 43 is a sectional view showing a part of fan 12 and motor 6 according to the embodiment. As shown in fig. 43, the position of the baffle portion 90 coincides with the position of at least a part of the stator core 28 in the radial direction. That is, the shutter portion 90 is configured to: and faces the stator core 28 at the rear of the motor 6. In the embodiment, the stator 26 includes: and a rear insulator 30 supported by the stator core 28. The baffle portion 90 faces the rear insulator 30. The baffle portion 90 and the rear surface of the stator core 28 face each other with the rear insulator 30 interposed therebetween.

The inner diameter Da of the baffle portion 90 is equal to the inner diameter Dc of the stator core 28. Further, the inner diameter Da of the baffle portion 90 may be larger than the inner diameter Dc of the stator core 28. When the teeth are provided on the inner surface of the stator core 28, the inner diameter Dc of the stator core 28 is: the inner diameter of the stator core 28 of the portion where no teeth are provided. That is, the inner diameter Dc of the stator core 28 is: the maximum value of the inner diameter of the stator core 28.

The fan 12 generates: the air flow for cooling the motor 6. Fan 12 is caused to rotate with rotor shaft 32 by rotation of rotor shaft 32. The fan 12 rotates, so that air in the external space of the housing 2 flows into the internal space of the housing 2 through the air inlet 19. The air flowing into the internal space of the housing 2 flows through the internal space of the housing 2 while contacting the motor 6. Thereby, the motor 6 is cooled. As indicated by arrow Fa in fig. 43, at least a part of the air contacting the motor 6 flows rearward toward the fan 12. The air from the motor 6 flows into the inside of the baffle portion 90. Fan 12 rotates so that the air flowing inside baffle portion 90 flows between blade portions 91, and then flows out radially outward from between blade portions 91. The air flowing out radially outward from between the plurality of vane portions 91 passes through the first exhaust port 20B and then passes through the second exhaust port 20A to be discharged into the space outside the casing 2.

As shown in fig. 6, the first exhaust port 20B and the second exhaust port 20A are arranged at positions shifted in the front-rear direction. As shown in fig. 43, the first exhaust port 20B includes: and an exhaust port 20B1, an exhaust port 20B2, and an exhaust port 20B3 arranged in the front-rear direction. The exhaust port 20B1 is disposed foremost, the exhaust port 20B2 is disposed second frontwardly next to the exhaust port 20B1, and the exhaust port 20B3 is disposed rearmost. The exhaust port 20B1 and at least a part of the flap portion 90 are disposed at the same position in the front-rear direction. The exhaust port 20B3 and at least a part of the main plate portion 88 are disposed at the same position in the front-rear direction.

As shown in fig. 6, the second exhaust port 20A has: and an exhaust port 20A1, an exhaust port 20A2, an exhaust port 20A3 and an exhaust port 20A4 arranged in the front-rear direction. The exhaust port 20a1 is disposed foremost, the exhaust port 20a2 is disposed second frontwardly next to the exhaust port 20a1, the exhaust port 20A3 is disposed third frontwardly next to the exhaust port 20a2, and the exhaust port 20a4 is disposed rearmost. The exhaust port 20a1 is disposed forward of the flap portion 90. The exhaust port 20a4 and at least a part of the main plate portion 88 are disposed at the same position in the front-rear direction.

By providing baffle portion 90, the generation of a vortex of air in at least a part of the periphery of fan 12 can be suppressed. In the case where the baffle portion 90 is not present, when the fan 12 rotates, for example, the possibility of generating a vortex of air at the peripheral portion of the front surface of the blade portion 91 increases. If a vortex of air is generated, the flow rate of air passing from the fan 12 may be reduced. Further, if a vortex of air is generated, the flow of air flowing radially outward from fan 12 may be obstructed. As a result, the motor 6 may not be sufficiently cooled.

By providing the baffle portion 90, the generation of the vortex of air can be suppressed. Therefore, the air can smoothly flow, and the flow rate of the air can be suppressed from decreasing. Therefore, the motor 6 is efficiently cooled.

[ Main shaft ]

Next, the spindle 8 will be explained. Fig. 44 is a perspective view showing the spindle 8 according to the embodiment. Fig. 45 is a perspective view showing the main shaft 8, the balls 48, and the hammer 47 according to the embodiment.

As shown in fig. 5, 44 and 45, the main shaft 8 includes: a flange portion 44; a rod portion 45 protruding forward from the flange portion 44; and a main shaft groove 50 for disposing at least a part of the balls 48.

A spindle groove 50 is provided on the outer surface of the rod portion 45. The main shaft groove 50 includes: a first portion 50A inclined to one side in the circumferential direction toward the rear, and a second portion 50B inclined to the other side in the circumferential direction toward the rear. The first portion 50A is provided with 2. The second portion 50B is provided with 2. The first portions 50A and the second portions 50B are alternately arranged in the circumferential direction.

Further, the main shaft 8 includes: a first supply port 93 to which lubricating oil is supplied, and a second supply port 92 to which lubricating oil is supplied. The first supply port 93 and the second supply port 92 are provided in the rod portion 45, respectively.

As described with reference to fig. 5, the main shaft 8 has an internal space 94 that accommodates lubricating oil. The first supply port 93 is disposed: radially outward of the interior space 94. The second supply port 92 is disposed: radially outward of the interior space 94. The first supply port 93 is connected to the internal space 94 through a first flow path 93R. The second supply port 92 is connected to the internal space 94 through a second flow path 92R. The first supply port 93 includes an opening radially outward of the first flow passage 93R. The second supply port 92 includes an opening radially outward of the second flow passage 92R.

The first supply port 93 is provided on the outer surface of the rod portion 45 outside the spindle groove 50. The second supply port 92 is provided on the outer surface of the rod portion 45 outside the spindle groove 50. The second supply port 92 is provided behind the first supply port 93.

The first flow path 93R includes: the through hole passes through the central axis (rotation axis AX) of the main shaft 8 and penetrates the rod 45. The first supply port 93 is provided at 2 of the outer surface of the rod portion 45. The second flow path 92R includes: the through hole passes through the central axis (rotation axis AX) of the main shaft 8 and penetrates the rod 45. The second supply port 92 is provided at 2 of the outer surface of the rod portion 45.

The balls 48 are disposed radially outward of the first supply port 93. A gasket 54 is disposed radially outward of the first supply port 93. The first supply port 93 may be disposed further rearward than the balls 48 and the washers 54. The first supply port 93 may be disposed radially inward of the coil spring 49, for example.

The first flow path 93R extends only in the vertical direction or only in the horizontal direction. The second flow path 92R extends only in the vertical direction or only in the lateral direction. The first flow path 93R may be inclined forward or rearward toward the radially outer side. In this case, the oil is more gradually discharged from the first flow path 93R. Similarly, the second flow passage 92R may be inclined forward or rearward toward the radially outer side.

Fig. 46 and 47 are sectional views each showing a hammer 47 according to the embodiment. Figure 46 corresponds to a view of the hammer 47 shown in figure 45 taken along the line B-B and in cross section as an arrow. Figure 47 corresponds to a C-C cross-sectional arrow view of the hammer 47 shown in figure 45.

As shown in fig. 45, 46, and 47, the hammer 47 includes: a hammer groove 51 in which at least a part of the balls 48 is disposed, and a hammer protrusion 59 protruding forward from the front surface of the hammer 47. The hammer 47 has a cylindrical shape. The hammer 47 has: and a hole 57 for positioning at least a portion of the shaft 45.

The hammer groove 51 is provided on the inner surface of the hammer 47. The hammer groove 51 includes: a third portion 51A inclined to one side in the circumferential direction toward the front, and a fourth portion 51B inclined to the other side in the circumferential direction toward the front. The third portion 51A is provided with 2. The number of the fourth portions 51B is 2. The third portions 51A and the fourth portions 51B are alternately arranged in the circumferential direction.

Fig. 48 is a development view schematically showing an outer surface of the rod portion 45 according to the embodiment. As shown in fig. 48, the main axial channel 50 includes a first portion 50A and a second portion 50B. The first portion 50A is inclined to one side in the circumferential direction toward the rear. The second portion 50B is inclined rearward and toward the other circumferential side.

The spindle groove 50 has: a front end 95 on one axial side and a rear end 96 on the other axial side. The position of the leading end of the first portion 50A and the position of the leading end of the second portion 50B coincide in the axial direction. In the axial direction, the position of the rear end portion of the first portion 50A and the position of the rear end portion of the second portion 50B coincide. The front end portion 95 includes: the tip end of the first portion 50A and the tip end of the second portion 50B. The rear end portion 96 includes: a rear end of the first portion 50A and a rear end of the second portion 50B.

The first supply port 93 is provided between the front end portion 95 and the rear end portion 96 in the axial direction. That is, the first supply port 93 is disposed rearward of the front end 95 and forward of the rear end 96. The first supply port 93 is provided in the axial direction: the outer surface of the rod portion 45 between the front end 95 and the rear end 96.

In the axial direction, the second supply port 92 is provided: the outer surface of the rod portion 45 further rearward than the rear end portion 96.

The lubricating oil supplied from the first supply port 93 is supplied to the surface of the ball 48. The first supply port 93 functions as a supply portion for supplying the lubricant to the balls 48.

The first supply port 93 supplies lubricating oil between the outer surface of the rod 45 and the inner surface of the hammer 47. The lubricating oil supplied from the first supply port 93 to between the outer surface of the rod 45 and the inner surface of the hammer 47 is supplied to the surface of the ball 48 by the movement of the hammer 47.

Fig. 49 is a diagram for explaining the operation of the hammer 47 according to the embodiment. Fig. 49 includes an expanded view schematically showing the outer surface of the shaft 45 and the inner surface of the hammer 47.

As described above, the spindle 8 and the hammer 47 are relatively movable in the axial direction and the rotational direction within the movable range defined by the spindle groove 50 and the hammer groove 51. The hammer 47 is capable of moving in the axial direction guided by the balls 48.

For example, in the screw tightening operation, when the motor 6 starts driving, the main shaft 8 starts rotating. When the load acting on the anvil 10 is low, the main shaft 8 rotates in a state where the hammer projection 59 and the anvil projection 60 are in contact with each other. That is, when the load acting on the anvil 10 is low, the hammer 47 is disposed at the front end of the movable range of the hammer 47 as shown in [ state a ] of fig. 49. In [ state a ], the spindle 8 and the hammer 47 rotate together in a state where the hammer protrusion 59 and the anvil protrusion 60 are in contact.

When the main shaft 8 rotates, the lubricating oil in the internal space 94 flows radially outward through the first flow passage 93R due to centrifugal force. The lubricating oil flowing through the first flow passage 93R is supplied from the first supply port 93 to between the outer surface of the rod 45 and the inner surface of the hammer 47.

In the screw fastening operation, when the load applied to the anvil 10 is increased, the rotation of the anvil 10 and the hammer 47 is stopped. Even if the rotation of the hammer 47 is stopped, the main shaft 8 continues to rotate by the power generated by the motor 6. When the main shaft 8 rotates in a state where the hammer 47 stops rotating, the balls 48 are guided by the main shaft groove 50 and move rearward. By the rearward movement of the balls 48, the hammer 47 is moved rearward from the front end of the movable range of the hammer 47 together with the balls 48 as shown in [ state B ] of fig. 49. When the main shaft 8 further continues to rotate, the hammer 47 moves rearward toward the rear end of the movable range of the hammer 47 together with the balls 48, as shown in [ state C ] of fig. 49. The hammer 47 moved to the rear moves forward while rotating by the elastic force of the coil spring 49. The hammer 47 strikes the anvil 10 in the rotational direction. Thus, the hammer 47 moves in the front-rear direction while rotating.

The lubricating oil supplied from the first supply port 93 adheres to the inner surface of the hammer 47. The hammer 47 is moved in the forward and backward direction while rotating, so that at least a part of the lubricating oil adhering to the inner surface of the hammer 47 is brought into contact with the surface of the ball 48. Thereby, the lubricating oil supplied from the first supply port 93 is supplied to the surface of the ball 48 via the inner surface of the hammer 47.

Further, by the relative movement of the main shaft 8 and the hammer 47, for example, as shown in [ state B ] of fig. 49, a state occurs in which the first supply port 93 and the hammer groove 51 face each other. In a state where the first supply port 93 and the hammer groove 51 face each other, the lubricating oil from the first supply port 93 is supplied to the inside of the hammer groove 51. By supplying the lubricating oil to the inside of the hammer groove 51, the lubricating oil is supplied to the surface of the ball 48 rolling in the hammer groove 51. Further, the first supply port 93 and the balls 48 are opposed to each other by the relative movement of the main shaft 8 and the hammer 47. In a state where the first supply port 93 and the balls 48 face each other, the first supply port 93 can directly supply the lubricating oil to the surfaces of the balls 48.

When the main shaft 8 rotates, the lubricating oil in the internal space 94 flows radially outward through the second flow path 92R due to centrifugal force. The lubricating oil flowing through the second flow path 92R is supplied from the second supply port 92 to between the outer surface of the rod 45 and the inner surface of the hammer 47. The second supply port 92 is located rearward of the rear end 96 of the main shaft groove 50 and supplies lubricating oil between the outer surface of the rod 45 and the inner surface of the hammer 47.

[ Effect ]

As explained above, according to the embodiment, there are provided: and a first supply port 93 for supplying lubricant to the balls 48. By supplying the lubricating oil to the surface of the ball 48, malfunction of the hammer 47 when the hammer 47 moves in the axial direction is suppressed. The main shaft 8 and the hammer 47 can be smoothly moved relatively.

The first supply port 93 is provided in the rod portion 45 of the spindle 8. Therefore, the lubricating oil from the first supply port 93 is smoothly supplied to the surface of the ball 48.

At least a portion of the balls 48 are disposed in the spindle groove 50. The first supply port 93 is provided between a front end 95 of the spindle groove 50 and a rear end 96 of the spindle groove 50 in the axial direction. This allows the lubricating oil from the first supply port 93 to be smoothly supplied to the surface of the ball 48.

The first supply port 93 is provided on the outer surface of the rod portion 45 outside the spindle groove 50. When the first supply port 93 is provided inside the spindle groove 50, there is a possibility that the lubricating oil hardly flows out smoothly from the first supply port 93 or the lubricating oil is accumulated inside the spindle groove 50. The first supply port 93 is provided on the outer surface of the rod portion 45 outside the spindle groove 50, so that the lubricating oil is smoothly supplied from the first supply port 93.

The lubricating oil from the first supply port 93 is supplied between the outer surface of the rod 45 and the inner surface of the hammer 47. As described with reference to fig. 46, at least a part of the lubricating oil adhering to the inner surface of the hammer 47 is supplied to the surface of the ball 48 by the axial movement of the hammer 47. Thereby, an appropriate amount of lubricating oil is uniformly supplied to the surface of the balls 48.

The main shaft 8 has an internal space 94 for containing lubricating oil. The first supply port 93 is disposed radially outward of the internal space 94. The first supply port 93 is connected to the internal space 94 through a first flow path 93R. Thus, when the main shaft 8 rotates, the lubricating oil in the internal space 94 flows radially outward through the first flow passage 93R due to centrifugal force, and is supplied from the first supply port 93 to between the outer surface of the rod 45 and the inner surface of the hammer 47.

The main shaft 8 has: and a second supply port 92 provided on the outer surface of the rod 45 at a position axially rearward of the rear end 96 of the main shaft groove 50. The main shaft 8 and the hammer 47 can be smoothly moved relative to each other by supplying the lubricating oil not only from the first supply port 93 but also from the second supply port 92. The second supply port 92 is connected to the internal space 94 through a second flow path 92R. That is, the first supply port 93 and the second supply port 92 are both connected to the internal space 94. This suppresses the complication of the structure of the main shaft 8. When the main shaft 8 rotates, lubricating oil is also supplied between the outer surface of the rod 45 and the inner surface of the hammer 47 from the second supply port 92 due to centrifugal force.

[ other embodiments ]

Fig. 50 is a side view showing a deformation suppressing member 85 according to the embodiment. In the above embodiment, the deformation suppressing member 85 has a rectangular plate shape. As shown in fig. 50, the deformation suppressing member 85 may be a columnar rod member. The deformation suppressing member 85 may be straight or curved.

Fig. 51 is a sectional view showing a deformation suppressing member 85 according to the embodiment. In the above-described embodiment, the deformation suppressing member 85 is disposed in the internal space of the controller accommodating portion 23. As shown in fig. 51, the deformation inhibiting member 85 may be implanted inside the housing 2 at the boundary portion 2C. The deformation suppressing member 85 may be disposed in the internal space of the grip portion 22.

Fig. 52 is a sectional view showing a deformation suppressing member 85 according to the embodiment. In the above embodiment, the deformation suppressing member 85 is fixed to the operation panel 16. As shown in fig. 52, the deformation inhibiting member 85 may be fixed to the controller case 62. In the example shown in fig. 52, the deformation suppressing member 85 includes a rod 85R projecting upward from the bottom plate 62A of the controller case 62. The upper end of the rod 85R supports the controller accommodating portion 23 of the housing 2 from the inside. In addition, an opening 13M in which the lever 85R is disposed may be provided in a part of the controller 13. The deformation suppressing member 85 shown in fig. 52 can suppress deformation of the housing 2 and protect the controller 13.

In the above embodiment, the buffer layer 86 may be omitted.

In the above-described embodiment, the first state of the light emitter 71 is the first blinking state (high-speed blinking state), and the second state of the light emitter 71 is the second blinking state (low-speed blinking state). For example, it may be: the first state is a low-speed blinking state, and the second state is a high-speed blinking state.

In the above-described embodiment, the registration pattern stored in the registration pattern storage unit 75 is 1 type. The registration pattern stored in the registration pattern storage unit 75 may be 2 types or 3 types. The number of registration patterns registered in the registration pattern storage unit 75 may be smaller than the number of operation patterns stored in the operation pattern storage unit 74, and may be any number.

In the above embodiment, the first supply port 93 may be provided inside the spindle groove 50.

In the above embodiment, the supply unit for supplying the lubricant to the balls 48 is: and a first supply port 93 provided in the main shaft 8. A supply portion that supplies lubricating oil to the balls 48 may be provided on the inner surface of the hammer 47.

In the above embodiment, the electric power tool 1 is an impact driver. The electric power tool 1 is not limited to the impact driver. As the electric power tool 1, there can be exemplified: screwdriver drills, angle drills, hammers, hammer drills, grinding machines, circular saws and reciprocating saws.

In the above-described embodiment, the electric working machine is an electric power tool. The electric working machine is not limited to the electric power tool. As the electric working machine, a garden tool can be exemplified. As the gardening tool, there can be exemplified: chainsaws, hedge trimmers, lawnmowers, lawn mowers, and blowers.

Claims (10)

1. An electric working machine, which is provided with a power unit,

the electric working machine includes: a motor; and a main shaft that rotates by power generated by the motor, characterized in that;

the electric working machine includes:

a hammer disposed around the main shaft;

a ball disposed between the spindle and the hammer;

an anvil that is struck by the hammer in a rotational direction; and

a supply portion for supplying lubricating oil to the balls.

2. The electric working machine according to claim 1,

the supply section includes: a first supply port provided in the spindle.

3. The electric working machine according to claim 2,

the main shaft has: a main shaft groove for disposing at least a part of the ball,

the spindle groove has: a front end portion on one axial side and a rear end portion on the other axial side,

the first supply port is disposed between the front end portion and the rear end portion in the axial direction.

4. The electric working machine according to claim 3,

the first supply port is provided on an outer surface of the spindle outside the spindle groove.

5. The electric working machine according to claim 2 or 3,

the main shaft has an internal space for receiving the lubricating oil,

the first supply port is disposed radially outward of the internal space,

the first supply port is connected to the internal space via a first flow path.

6. An electric working machine, which is provided with a power unit,

the electric working machine includes: a motor; and a main shaft rotated by power generated by the motor; it is characterized in that the preparation method is characterized in that,

the electric working machine includes:

a hammer disposed around the main shaft;

a ball disposed between the spindle and the hammer; and

an anvil that is struck by the hammer in a rotational direction,

the main shaft has:

a main shaft groove for disposing at least a part of the balls; and

a first supply port for supplying lubricating oil,

the spindle groove has: a front end portion on one axial side and a rear end portion on the other axial side,

the first supply port is disposed between the front end portion and the rear end portion in the axial direction.

7. The electric working machine according to claim 6,

the first supply port is provided on an outer surface of the spindle outside the spindle groove.

8. The electric working machine according to claim 7,

supplying the lubricating oil from the first supply port between an outer surface of the main shaft and an inner surface of the hammer,

the hammer is moved to the other side in the axial direction by the rotation of the main shaft in a state where the rotation of the anvil is stopped,

the lubricating oil is supplied to the balls by the movement of the hammer.

9. The electric working machine according to claim 6,

the main shaft has an internal space for receiving the lubricating oil,

the first supply port is disposed radially outward of the internal space,

the first supply port is connected to the internal space via a first flow path.

10. The electric working machine according to claim 7,

the main shaft has:

an internal space that accommodates the lubricating oil; and

a second supply port provided on the outer surface on the other axial side than the rear end portion in the axial direction,

the first supply port is connected to the internal space via a first flow path,

the second supply port is connected to the internal space via a second flow path.

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