JP2021037562A - Electric work machine - Google Patents

Abstract

To smoothly move a spindle and a hammer relatively to each other.SOLUTION: An electric work machine includes: a motor; a spindle rotating with the power generated by the motor; a hammer disposed around the spindle; balls disposed between the spindle and the hammer; an anvil struck by the hammer in a rotation direction; and a feeding part for feeding lubricant to the balls.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an electric working machine.

In the technical field related to electric work machines, impact drivers as disclosed in Patent Document 1 are known.

Japanese Unexamined Patent Publication No. 2019-072811

The impact driver has a spindle, a hammer placed around the spindle, and a ball placed between the spindle and the hammer. If the spindle and hammer cannot move smoothly relative to each other, the performance of the impact driver may deteriorate.

It is an object of the present disclosure to smoothly move the spindle and the hammer relative to each other.

According to the present disclosure, the motor, the spindle rotated by the power generated by the motor, the hammer arranged around the spindle, the ball arranged between the spindle and the hammer, and the hammer. An electric motor is provided that includes an anvil that is hit in the rotational direction and a supply unit that supplies lubricating oil to the ball.

According to the present disclosure, the spindle and the hammer can be smoothly moved relative to each other.

FIG. 1 is a perspective view showing a power tool according to an embodiment. FIG. 2 is a side view showing the power tool according to the embodiment. FIG. 3 is a rear view showing the power tool according to the embodiment. FIG. 4 is a cross-sectional view showing the power tool according to the embodiment. FIG. 5 is an enlarged cross-sectional view of the upper part of the power tool according to the embodiment. FIG. 6 is an enlarged cross-sectional view of the upper part of the power tool according to the embodiment. FIG. 7 is a perspective view showing the spindle, striking mechanism, and anvil according to the embodiment. FIG. 8 is an exploded perspective view of the spindle, striking mechanism, and anvil according to the embodiment as viewed from the front. FIG. 9 is an exploded perspective view of the spindle, striking mechanism, and anvil according to the embodiment as viewed from the rear. FIG. 10 is a block diagram showing a power tool including a controller according to the embodiment. FIG. 11 is a schematic view showing the 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 showing a control mode switching method according to the embodiment. FIG. 14 is a diagram for explaining the control characteristics of the striking force mode according to the embodiment. FIG. 15 is a diagram for explaining the number of rotations of the motor when the hammer hits the anvil in the rotation direction in the striking force mode according to the embodiment. FIG. 16 is a diagram for explaining the control characteristics of the wood mode according to the embodiment. FIG. 17 is a diagram for explaining the control characteristics of the tex (thickness) mode according to the embodiment. FIG. 18 is a diagram for explaining the control characteristics of the bolt mode in the bolt tightening operation according to the embodiment. FIG. 19 is a diagram for explaining the control characteristics of the bolt mode in the bolt removing operation according to the embodiment. FIG. 20 is a transition diagram showing a state of the notification device in the setting of the striking force mode according to the embodiment. FIG. 21 is a transition diagram showing a state of the notification device in the setting of the dedicated mode according to the embodiment. FIG. 22 is a transition diagram showing a state of the notification device in the fastest mode registration process and the memory mode setting according to the embodiment. FIG. 23 is a transition diagram showing a state of the notification device in the strong mode registration process and the memory mode setting according to the embodiment. FIG. 24 is a transition diagram showing a state of the notification device in the registration process of the medium mode and the setting of the memory mode according to the embodiment. FIG. 25 is a transition diagram showing a state of the notification device in the weak mode registration process and the memory mode setting according to the embodiment. FIG. 26 is a transition diagram showing a state of the notification device in the wood mode registration process and the memory mode setting according to the embodiment. FIG. 27 is a transition diagram showing a state of the notification device in the tex (thin) mode registration process and the memory mode setting according to the embodiment. FIG. 28 is a transition diagram showing a state of the notification device in the tex (thickness) mode registration process and the memory mode setting according to the embodiment. FIG. 29 is a transition diagram showing a state of the notification device in the registration process of the bolt 1 mode and the setting of the memory mode according to the embodiment. FIG. 30 is a transition diagram showing a state of the notification device in the registration process of the bolt 2 mode and the setting of the memory mode according to the embodiment. FIG. 31 is a transition diagram showing a state of the notification device in the registration process of the bolt 3 mode and the setting of the memory mode according to the embodiment. FIG. 32 is an enlarged cross-sectional view of the lower part of the power tool according to the embodiment. FIG. 33 is an enlarged cross-sectional view of the lower part of the 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 view showing a state in which an external force is applied to the power tool according to the comparative example. FIG. 38 is a schematic view showing a state in which an external force is applied to the power tool according to the embodiment. FIG. 39 is a diagram schematically showing a deformation suppressing member according to the 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 cross-sectional view showing a fan according to the embodiment. FIG. 43 is a cross-sectional view showing a part of the fan and the motor according to the embodiment. FIG. 44 is a perspective view showing the spindle according to the embodiment. FIG. 45 is a perspective view showing a spindle, a ball, and a hammer according to an embodiment. FIG. 46 is a cross-sectional view showing a hammer according to the embodiment. FIG. 47 is a cross-sectional view showing a hammer according to the embodiment. FIG. 48 is a developed view schematically showing the 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 diagram schematically showing a deformation suppressing member according to an embodiment. FIG. 51 is a cross-sectional view showing a deformation suppressing member according to the embodiment. FIG. 52 is a diagram schematically showing the deformation suppressing member according to the embodiment.

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

In the embodiment, the positional relationship of each part will be described using the terms left, right, front, back, top, and bottom. These terms refer to a relative position or direction with respect to the center of the electric work machine. In the embodiment, the electric work machine is an electric tool 1 having a motor 6.

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

The rotation axis AX extends in the front-rear direction. One side in the axial direction is the front and the other side in the axial direction is the rear. Further, in the radial direction, a position close to or close to the rotation axis AX is appropriately referred to as a radial inside, and a position far from or away from the rotation axis AX is appropriately referred to as a radial outside.

[Overview of power tools]
FIG. 1 is a perspective view showing a power tool 1 according to an embodiment. FIG. 2 is a side view showing the power tool 1 according to the embodiment. FIG. 3 is a rear view showing the power tool 1 according to the embodiment. FIG. 4 is a cross-sectional view showing the power tool according to the embodiment. FIG. 4 is a cross-sectional view showing the power tool 1 according to the embodiment. FIG. 5 is an enlarged cross-sectional view of the upper part of the power tool 1 according to the embodiment. FIG. 6 is an enlarged cross-sectional view of the upper part of the power tool according to the embodiment. FIG. 5 is a vertical cross-sectional view of the upper part of the power tool 1. FIG. 6 is a cross-sectional view of the upper part of the power tool 1.

In the embodiment, the power tool 1 is an impact driver. The power tool 1 includes a housing 2, a rear case 3, a hammer case 4, a battery mounting portion 5, a motor 6, a reduction mechanism 7, a spindle 8, a striking mechanism 9, an anvil 10, and a chuck sleeve 11. , A fan 12, a controller 13, a trigger switch 14, a forward / reverse switching lever 15, an operation panel 16, a mode switching switch 17, and a light 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 arranged to the right of the left housing 2L. As shown in FIGS. 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 composed of a pair of half-split housings.

The housing 2 has a motor accommodating portion 21, a grip portion 22 arranged below the motor accommodating portion 21, and a controller accommodating portion 23 arranged below the grip portion 22.

The motor accommodating portion 21 has a tubular shape. The motor accommodating portion 21 accommodates at least a part of the motor 6.

The grip portion 22 projects downward from the motor accommodating portion 21. The trigger switch 14 is provided on the grip portion 22. The grip portion 22 is gripped by the operator.

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

The rear case 3 is made of synthetic resin. The rear case 3 is arranged behind the motor accommodating portion 21. The rear case 3 houses at least a part of the fan 12. The rear case 3 is arranged so as to cover the rear opening of the motor accommodating portion 21. As shown in FIG. 3, the rear case 3 is fixed to the motor accommodating portion 21 by two screws 3S.

The motor accommodating portion 21 has an intake port 19. Further, the motor accommodating portion 21 has a first exhaust port 20B. The first exhaust port 20B is formed in the tubular portion 21A at the rear of the motor accommodating portion 21. The rear case 3 has a second exhaust port 20A. The air in the outer space of the housing 2 flows into the inner space of the housing 2 through the intake port 19. The air in the internal space of the housing 2 passes through the first exhaust port 20B and then passes through the second exhaust port 20A. The air in the internal space of the housing 2 flows out to the external space of the housing 2 through the first exhaust port 20B and the second exhaust port 20A.

The hammer case 4 is made of metal. In the embodiment, the hammer case 4 is made of aluminum. The hammer case 4 is arranged in front of the motor accommodating portion 21. The hammer case 4 has a tubular shape. The inner diameter of the front portion of the hammer case 4 is smaller than the inner diameter of the rear portion of the hammer case 4. The rear portion of the hammer case 4 is inserted into the opening at the front portion of the motor accommodating portion 21. The rear portion of the hammer case 4 is fitted inside the motor accommodating portion 21. The motor accommodating portion 21 and the hammer case 4 are connected via a bearing retainer 24. At least a portion of the bearing retainer 24 is located inside the hammer case 4.

The hammer case 4 accommodates at least a part of the reduction mechanism 7, the spindle 8, the striking mechanism 9, and the anvil 10. At least a part of the speed reduction mechanism 7 is arranged inside the bearing retainer 24.

The battery mounting portion 5 is formed in the lower part of the controller accommodating portion 23. The battery mounting portion 5 is connected to the battery pack 25. The battery pack 25 is mounted on the battery mounting portion 5. The battery pack 25 can be attached to and detached from the battery mounting portion 5. The battery pack 25 includes a secondary battery. In an embodiment, the battery pack 25 includes a rechargeable lithium-ion battery. By being mounted on the battery mounting portion 5, the battery pack 25 can supply electric power to the power tool 1. The motor 6 is driven based on the electric power supplied from the battery pack 25. The controller 13 and the operation panel 16 operate based on the electric power supplied from the battery pack 25.

The motor 6 is a power source for the power tool 1. The motor 6 is an inner rotor type brushless motor. The motor 6 has a stator 26 and a rotor 27 arranged inside the stator 26.

The stator 26 is mounted on the stator core 28 via the stator core 28, the front insulator 29 provided at the front portion of the stator core 28, the rear insulator 30 provided at the rear portion of the stator core 28, and the front insulator 29 and the rear insulator 30. With the coil 31 of.

The stator core 28 includes a plurality of laminated steel plates. The steel plate is a metal plate containing iron as a main component. The stator core 28 has a tubular shape. The stator core 28 has a plurality of teeth that support the coil 31. Each of the front insulator 29 and the rear insulator 30 is an electrically insulating member made of synthetic resin. The front insulator 29 is arranged so as to cover a part of the surface of the tooth. The rear insulator 30 is arranged so as to cover a part of the surface of the tooth. The coil 31 is arranged around the teeth via 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 arranged around the rotor shaft 32, a permanent magnet 34 arranged around the rotor core 33, and a permanent magnet 35 for a sensor. The rotor shaft 32 extends in the axial direction. The rotor core 33 has a cylindrical shape. The rotor core 33 includes a plurality of laminated steel plates. The permanent magnet 34 has a cylindrical shape. The permanent magnet 34 includes a first-polarity first permanent magnet and a second-polarity second permanent magnet. Cylindrical permanent magnets 34 are formed by alternately arranging the first permanent magnets and the second permanent magnets in the circumferential direction. The sensor permanent magnet 35 is arranged in front of the rotor core 33 and the permanent magnet 34. At least a part of the resin sleeve 36 is arranged inside the permanent magnet 35 for the sensor. The resin sleeve 36 has a cylindrical shape. The resin sleeve 36 is attached to the front portion of the rotor shaft 32.

The sensor board 37 and the coil terminal 38 are attached to the front insulator 29. The sensor board 37 and the coil terminal 38 are fixed to the front insulator 29 by the screws 29S. The sensor board 37 has an annular circuit board and a rotation detection element supported by the circuit board. The rotation detection element detects the position of the rotor 27 in the rotation direction by detecting the position of the sensor permanent magnet 35 of the rotor 27. The coil terminal 38 connects a plurality of coils 31 and three power lines from the controller 13.

The rotor shaft 32 is rotatably supported by the front bearing 39 and the rear bearing 40, respectively. The front bearing 39 is held by the bearing retainer 24. The rear bearing 40 is held in the rear case 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 front end portion of the rotor shaft 32 is arranged in the internal space of the hammer case 4 through the opening of the bearing retainer 24.

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

The speed reduction mechanism 7 is arranged in front of the motor 6. The speed reduction mechanism 7 connects the rotor shaft 32 and the spindle 8. The speed reduction mechanism 7 transmits the power generated by the motor 6 to the spindle 8. The speed reduction mechanism 7 rotates the spindle 8 at a rotation speed lower than the rotation speed of the rotor shaft 32. The reduction mechanism 7 includes a planetary gear mechanism.

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

When the rotor shaft 32 is rotated by the drive 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. Due to the revolution of the planetary gear 42, the spindle 8 connected to the planetary gear 42 via the pin 42P rotates at a rotation speed lower than the rotation speed of the rotor shaft 32.

The spindle 8 is arranged in front of the motor 6. At least a part of the spindle 8 is arranged in front of the reduction mechanism 7. The spindle 8 has a flange portion 44 and a rod portion 45 projecting forward from the flange portion 44. The planetary gear 42 is rotatably supported by the flange portion 44 via the pin 42P. The rotating shaft of the spindle 8 and the rotating shaft AX of the motor 6 coincide with each other. The spindle 8 rotates about the rotation axis AX. The spindle 8 is rotatably supported by the rear bearing 46. The rear bearing 46 is held by the bearing retainer 24. The rear bearing 46 supports the rear end of the spindle 8.

The spindle 8 has a first supply port 93 for supplying lubricating oil and a second supply port 92 for supplying lubricating oil. Lubricating oil contains grease. Each of the first supply port 93 and the second supply port 92 is provided on the rod portion 45. The spindle 8 has an internal space 94 in which lubricating oil is housed. The first supply port 93 is connected to the internal space 94 via the first flow path 93R. The second supply port 92 is connected to the internal space 94 via the second flow path 92R. Due to the centrifugal force of the spindle 8, the lubricating oil is supplied from each of the first supply port 93 and the second supply port 92 to at least a part around the spindle 8.

The striking mechanism 9 strikes the anvil 10 in the rotational direction based on the rotation of the spindle 8. The striking mechanism 9 has a hammer 47 arranged around the spindle 8, a ball 48 arranged between the spindle 8 and the hammer 47, and a coil spring 49 supported by each of the spindle 8 and the hammer 47. .. The hammer 47 is arranged in front of the speed reduction mechanism 7.

FIG. 7 is a perspective view showing the spindle 8, the striking mechanism 9, and the anvil 10 according to the embodiment. FIG. 8 is an exploded perspective view of the spindle 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 spindle 8, the striking mechanism 9, and the anvil 10 according to the embodiment as viewed from the rear. Note that in FIG. 7, the ball 48 and the coil spring 49 are not shown.

As shown in FIGS. 4, 5, 6, 7, 8, and 9, the hammer 47 has a tubular shape. The hammer 47 is arranged around the rod portion 45. The hammer 47 has a hole 57 in which the rod portion 45 is arranged. The hammer 47 can rotate together with the spindle 8. The rotating shaft of the hammer 47, the rotating shaft of the spindle 8, and the rotating shaft AX of the motor 6 coincide with each other. The hammer 47 rotates about the rotation axis AX.

The ball 48 is made of metal such as steel. The ball 48 is arranged between the rod portion 45 and the hammer 47. The spindle 8 has a spindle groove 50 in which at least a part of the balls 48 is arranged. The spindle groove 50 is provided on a part of the outer surface of the rod portion 45. The hammer 47 has a hammer groove 51 in which at least a part of the balls 48 is arranged. The hammer groove 51 is provided on a part of the inner surface of the hammer 47. The ball 48 is arranged between the spindle groove 50 and the hammer groove 51. The ball 48 can roll inside the spindle groove 50 and inside the hammer groove 51, respectively. The hammer 47 is movable with the ball 48. The spindle 8 and the hammer 47 can move relative to each other in the axial direction and the rotational direction within the 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 arranged between the flange portion 44 and the hammer 47. A ring-shaped convex portion 52 is provided on the front surface of the flange portion 44. The convex portion 52 projects forward from the peripheral edge portion on the front surface of the flange portion 44. A ring-shaped 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 portion of the coil spring 49 is arranged inside the convex portion 52 and is supported by the flange portion 44. The front end portion of the coil spring 49 is arranged inside the recess 53 and is supported by the washer 54.

The anvil 10 is arranged in front of the hammer 47. The anvil 10 has an insertion hole 55 into which a tip tool is inserted. The insertion hole 55 is provided at the front end of the anvil 10. The tip tool is attached to the anvil 10. Further, the anvil 10 has a hole 58 in which the front end portion of the rod portion 45 is arranged. The hole 58 is provided at the rear end of the anvil 10. The front end portion of the rod portion 45 is arranged in the hole 58.

The anvil 10 is rotatable with the hammer 47. The rotating shaft of the anvil 10, the rotating shaft of the hammer 47, the rotating shaft of the spindle 8, and the rotating shaft AX of the motor 6 coincide with each other. The anvil 10 rotates about the rotation axis AX. The anvil is rotatably supported by a pair of front bearings 56. The pair of front bearings 56 are held in the hammer case 4.

The hammer 47 has a tubular body 47B and a hammer protrusion 59. The recess 53 is provided on the rear surface of the body 47B. The hammer protrusion 59 is provided on the front portion of the body 47B. Two hammer protrusions 59 are provided. The hammer protrusion 59 projects forward from the front portion of the body 47B.

The anvil 10 has a rod-shaped body 10B and an anvil protrusion 60. The insertion hole 55 is provided at the front end portion of the body 10B. The anvil protrusion 60 is provided at the rear end of the anvil 10. Two anvil protrusions 60 are provided. The anvil protrusion 60 projects radially outward from the rear end of the body 10B.

The hammer protrusion 59 and the anvil protrusion 60 are in contact with each other. When the motor 6 is driven in a state where the hammer protrusion 59 and the anvil protrusion 60 are in contact with each other, the anvil 10 rotates together with the hammer 47 and the spindle 8.

The anvil 10 is hit in the rotational direction by the hammer 47. For example, in the screw tightening work, if the load acting on the anvil 10 becomes high, a situation may occur in which the anvil 10 cannot be rotated only by the power generated by the motor 6. When 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 spindle 8 and the hammer 47 can move relative to each other in the axial direction and the circumferential direction via the ball 48. Even if the rotation of the hammer 47 is stopped, the rotation of the spindle 8 is continued by the power generated by the motor 6. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the ball 48 moves backward while being guided by the spindle groove 50 and the hammer groove 51, respectively. The hammer 47 receives a force from the ball 48 and moves backward with the ball 48. That is, the hammer 47 moves rearward by rotating the spindle 8 while the rotation of the anvil 10 is stopped. When the hammer 47 moves rearward, the contact between the hammer protrusion 59 and the anvil protrusion 60 is released.

The coil spring 49 generates an elastic force that moves the hammer 47 forward. The hammer 47 that has moved rearward moves forward due to the elastic force of the coil spring 49. When the hammer 47 moves forward, it receives a force in the rotational direction from the ball 48. That is, the hammer 47 moves forward while rotating. When the hammer 47 rotates and moves forward, the hammer protrusion 59 rotates and comes into contact with the anvil protrusion 60. As a result, the anvil protrusion 60 is hit by the hammer protrusion 59 in the rotational direction. Both the power of the motor 6 and the inertial force of the hammer 47 act on the anvil 10. Therefore, the anvil 10 can rotate about the rotation shaft 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 tool inserted into the insertion hole 55.

As shown in FIGS. 4 and 5, the fan 12 is arranged behind the motor 6. The fan 12 creates an air flow for cooling the motor 6. The fan 12 is fixed to at least a part of the rotor 27. The fan 12 is fixed to the rear portion of the rotor shaft 32 via the bush 61. The fan 12 is arranged between the rear bearing 40 and the stator 26. The fan 12 is rotated by the rotation of the rotor 27. As the rotor shaft 32 rotates, the fan 12 rotates together with the rotor shaft 32. As the fan 12 rotates, the air in the external space of the housing 2 flows into the internal space of the housing 2 through the intake port 19. The air that has flowed into the internal space of the housing 2 cools the motor 6 by circulating in the internal space of the housing 2. The air flowing through the internal space of the housing 2 flows out to the external space of the housing 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 unit 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. Electronic components mounted on the board include processors such as CPUs (Central Processing Units), non-volatile memories such as ROM (Read Only Memory) or storage, volatile memories such as RAM (Random Access Memory), and transistors. And resistance are exemplified.

The power tool 1 includes a controller case 62 in which at least a part of the controller 13 is housed. The controller case 62 is arranged in the internal space of the controller accommodating 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 work content of the electric tool 1. The control mode of the motor 6 refers to a control method or control pattern of the motor 6.

As shown in FIGS. 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 member 14A and a switch circuit 14B. The switch circuit 14B is housed in the grip portion 22. The trigger member 14A projects forward from the upper part of the front portion of the grip portion 22. The trigger member 14A is operated by an operator. By operating the trigger member 14A, the drive and stop of the motor 6 are switched.

As shown in FIG. 1, the forward / reverse switching lever 15 is provided on the upper portion of the grip portion 22. The forward / reverse switching lever 15 is operated by an operator. By operating the forward / reverse switching lever 15, the rotation direction of the motor 6 is switched from one of the forward rotation direction and the reverse rotation direction to the other. By switching the rotation direction of the motor 6, the rotation direction of the spindle 8 is switched.

As shown in FIGS. 1 and 4, the operation panel 16 is provided in the controller accommodating portion 23. The operation panel 16 is operated by an operator to switch the control mode of the motor 6. The operation panel 16 has a plate shape. The controller accommodating portion 23 has an opening 63 in which the operation panel 16 is arranged. The opening 63 is provided on the upper surface of the controller accommodating portion 23 in front of the grip portion 22. At least a portion of the operation panel 16 is arranged in the opening 63.

The operation panel 16 has a striking force switch 64 and a dedicated switch 65. Each of the striking force switch 64 and the dedicated switch 65 is operated by an 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 changeover switch 17.

The lights 18 are arranged on the left side and the right side of the motor accommodating portion 21, respectively. The light 18 emits illumination light that illuminates the front of the power tool 1. The light 18 includes, for example, a light emitting diode (LED).

[Operation of power tools]
Next, the operation of the power tool 1 will be described. For example, when a screw tightening operation is performed on a machining target, a tip tool used for the screw tightening operation is inserted into an insertion hole 55 of the anvil 10. The tip 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 grasps the grip portion 22 and operates the trigger switch 14. When the trigger switch 14 is operated, electric power is supplied from the battery pack 25 to the motor 6 to start the motor 6. When the motor 6 is started, the rotor shaft 32 rotates. 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 spindle 8 via the pin 42P. Due to the revolution of the planetary gear 42, the spindle 8 rotates at a rotation speed lower than the rotation speed of the rotor shaft 32.

When the spindle 8 rotates while the hammer protrusion 59 and the anvil protrusion 60 are in contact with each other, the anvil 10 rotates together with the hammer 47 and the spindle 8. As the anvil 10 rotates, the screw tightening work proceeds.

When a load of a predetermined value or more acts on the anvil 10 due to the progress of the screw tightening work, the rotation of the anvil 10 and the hammer 47 is stopped. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the hammer 47 moves backward. When the hammer 47 moves rearward, the contact between the hammer protrusion 59 and the anvil protrusion 60 is released. The hammer 47 that has moved rearward moves forward while rotating due to the elastic force of the coil spring 49. As the hammer 47 moves forward while rotating, the anvil 10 is hit by the hammer 47 in the rotational direction. As a result, the anvil 10 rotates about the rotation shaft AX with a high torque. Therefore, the screw is tightened to the object to be machined with a high torque.

[controller]
FIG. 10 is a block diagram showing a power tool 1 including a controller 13 according to the embodiment. The power tool 1 includes a motor 6, a controller 13, an operating device 66, a notification device 67, and a hit detection device 68.

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

The controller 13 has a storage device 69 and a control device 70. The storage device 69 includes a non-volatile memory such as a ROM (Read Only Memory) or storage. 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 operating device 66 is operated by an operator. The operation device 66 outputs an operation signal when operated by 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. By operating the operating device 66, the control mode of the motor 6 is switched. In the embodiment, the operation device 66 includes a striking force switch 64 provided on the operation panel 16, a dedicated switch 65 provided on the operation panel 16, and a mode changeover switch 17 provided above the trigger member 14A. And include.

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 operating device 66. A plurality of light emitters 71 are provided. The light emitter 71 includes a plurality of operation light emitters 72 and an identification light emitter 73. Four operating light emitters 72 are provided. The operating light emitter 72 includes a first operating light emitting device 72A, a second operating light emitting device 72B, a third operating light emitting device 72C, and a fourth operating light emitting device 72D. One identification light emitter 73 is provided. In the embodiment, five light emitters 71 are provided.

The impact detection device 68 detects whether or not the anvil 10 has been impacted by the hammer 47. The impact detection device 68 includes a rotation speed sensor that detects the rotation speed of the motor 6. When the hammer 47 starts striking, the rotation speed of the motor 6 fluctuates. The impact detection device 68 can detect whether or not the anvil 10 has been impacted by detecting the rotation speed of the motor 6.

The impact detection device 68 may include a current sensor that detects the current supplied to the motor 6. When the hammer 47 starts striking, the current supplied to the motor 6 fluctuates. The impact detection device 68 can detect whether or not the anvil 10 has been impacted by detecting the current supplied to the motor 6. The impact detection device 68 may include a vibration sensor that detects vibration acting on the power tool 1. When the hammer 47 starts striking, the amplitude of the vibration acting on the power tool 1 fluctuates. The impact detection device 68 can detect whether or not the anvil 10 has been impacted 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 the embodiment, the control mode includes a plurality of operation modes and a registration mode selected from the plurality of operation modes. The storage device 69 has an operation mode storage unit 74 that stores a plurality of operation modes, and a registration mode storage unit 75 that stores the registration mode.

The control device 70 outputs a control signal for controlling the motor 6. The 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 view showing the 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 memory mode. The operation mode includes a plurality of first operation modes and a plurality of second operation modes.

The first operation mode is a striking force mode indicating a general-purpose operation mode. The second operation mode is a dedicated mode indicating an operation mode dedicated based on the machining target. 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 a dedicated mode.

The striking force mode includes the fastest mode, the strong mode, the medium mode, and the weak mode. Dedicated modes include wood mode, tex mode, and bolt mode. The tex mode includes a tex (thin) mode and a tex (thick) mode. The bolt mode includes a bolt 1 mode, a bolt 2 mode, and a bolt 3 mode. The memory mode includes a registration mode.

The operation mode storage unit 74 has a plurality of operation modes (fastest mode, strong mode, medium mode, weak mode, wood mode, tex (thin) mode, tex (thick) mode, bolt 1 mode, bolt 2 mode, bolt 3 mode). ) Is memorized. The registration mode storage unit 75 stores the registration mode.

There are 10 types of operation modes stored in the operation mode storage unit 74. The registration mode storage unit 75 stores at least one operation mode selected from the ten types of operation modes as the registration mode. In the embodiment, there is only one type of registration mode stored in the registration mode storage unit 75. There are 11 types of control modes stored in the storage device 69.

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

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

The command output unit 76 outputs a registration command for registering the operation mode selected from the plurality of operation modes as the registration mode in the registration mode storage unit 75 based on the operation signal output from the operation device 66. The registration mode storage unit 75 stores the selected operation mode as the registration mode.

The command output unit 76 outputs a mode command when the operation device 66 is first operated. When the operation device 66 is first operated, the operation device 66 outputs the first operation signal. Based on the first operation signal output from the operation device 66, the command output unit 76 outputs a mode command for setting one type of control mode from the 11 types of control modes stored in the storage device 69.

The command output unit 76 outputs a registration command when the operation device 66 is secondly operated. When the operation device 66 is secondly operated, a second operation signal is output from the operation device 66. The command output unit 76 outputs a registration command for registering one type of operation mode from the ten types of operation modes stored in the operation mode storage unit 74 based on the second operation signal output from the operation device 66. To do.

That is, when the operation device 66 is first operated and a mode command is output, one type of control mode specified by the first operation is selected from the 11 types of control modes stored in the storage device 69. To. The motor 6 is set to the selected control mode.

When the operation device 66 is secondly operated and a registration command is output, one type of operation mode specified by the second operation is selected from the ten types of operation modes stored in the operation mode storage unit 74. To. The registration mode storage unit 75 stores the selected operation mode as the registration mode.

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

The first operation includes operating one of the plurality of switches of the operating device 66. The second operation includes operating at least two of the plurality of switches of the operating device 66 at the same time.

In the embodiment, the first operation includes at least one of operating only the striking force switch 64, operating only the dedicated switch 65, and operating only the mode changeover switch 17.

By operating only the striking force switch 64, the command output unit 76 outputs a mode command for setting the striking force mode. When the mode command is output, one type of striking force mode is selected from the four types of striking force modes stored in the operation mode storage unit 74. The motor 6 is set to one selected striking force mode.

When only the dedicated switch 65 is operated, the command output unit 76 outputs a mode command for setting the dedicated mode. When the mode command is output, one type of dedicated mode is selected from the six types of dedicated modes stored in the operation mode storage unit 74. The motor 6 is set to one selected dedicated mode.

When only the mode changeover switch 17 is operated, the command output unit 76 outputs a mode command for setting the memory mode. When the mode command is output, the registration mode stored in the registration mode storage unit 75 is selected. The motor 6 is set to the memory mode.

The second operation includes at least one of operating the striking force switch 64 and the mode changeover switch 17 at the same time, and operating the dedicated switch 65 and the mode changeover switch 17 at the same time.

When the striking force switch 64 and the mode changeover switch 17 are operated at the same time, the command output unit 76 outputs a registration command for registering the striking force mode. When the registration command is output, one type of striking force mode is selected from the four types of striking force modes stored in the operation mode storage unit 74. One selected striking force mode is registered in the registration mode storage unit 75.

When the dedicated switch 65 and the mode changeover switch 17 are operated at the same time, the command output unit 76 outputs a registration command for registering the dedicated mode. When the registration command is output, one type of dedicated mode is selected from the six types of dedicated modes stored in the operation mode storage unit 74. One selected dedicated 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 unit 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 unit 78 controls the notification device 67 based on the control mode set by the first operation of the operation device 66. The notification control unit 78 controls each of the plurality of light emitters 71 based on the mode command.

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

The notification control unit 78 controls the operation patterns of the light emitters 71, which is smaller than the number of control modes, so that the setting status of the control mode and the execution status of the registration process are notified. The notification control unit 78 controls the operation pattern of the light emitter 71 so that the set control mode is notified. The notification control unit 78 controls the operation pattern of the light emitter 71 so that the execution status of the registration process is notified.

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

[Control mode]
FIG. 12 is a diagram showing an operation panel 16 according to the embodiment. As shown in FIG. 12, the operation panel 16 has at least a part of the operation device 66 and a notification device 67 having a plurality of light emitters 71. The operation panel 16 is provided with a striking force switch 64 operated to set the striking force mode and a dedicated switch 65 operated to set the dedicated mode as the operating device 66. The striking force switch 64 is arranged on the right side of the operation panel 16. The dedicated switch 65 is arranged on the left side of the operation panel 16.

The light emitter 71 includes a light emitting diode (LED). The plurality of light emitters 71 are arranged at intervals in the left-right direction. In the left-right direction, the plurality of light emitters 71 are arranged between the striking force switch 64 and the dedicated switch 65.

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

A plurality of operation light emitters 72 are provided. The operating light emitter 72 includes a first operating light emitting device 72A, a second operating light emitting device 72B, a third operating light emitting device 72C, and a fourth operating light emitting device 72D. The four operation light emitters 72 are arranged at intervals in the left-right direction.

The identification light emitter 73 functions as a first identification light emitter that operates to distinguish between the striking force mode and the dedicated mode. The identification light emitter 73 is arranged to the left of the operating light emitter 72.

The operation panel 16 is provided at least in a part around the plurality of operation light emitters 72, and is provided in at least a part around the first symbol 79 indicating each of the plurality of striking force modes and the plurality of operation light emitters 72. It is provided with a second symbol 80 indicating each of the plurality of dedicated modes. Further, the operation panel 16 is provided in at least a part around the plurality of operation light emitters 72, and includes a third symbol 81 indicating each of the plurality of dedicated modes.

The first symbol 79 is provided to identify a plurality of striking force modes. The first symbol 79 is attached to the surface of the operation panel 16 by printing, for example. The first symbol 79 includes at least one of numbers, letters, symbols, and illustrations. The first symbol 79 includes a symbol 79A indicating a weak mode, a symbol 79B indicating a medium mode, a symbol 79C indicating a strong mode, and a symbol 79D indicating the fastest mode. In an embodiment, the symbol 79A is the number "1". The symbol 79B is the number "2". The symbol 79C is the number "3". The symbol 79D is the number "4".

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

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

The second symbol 80 is provided to identify a plurality of dedicated modes. The second symbol 80 is attached to the surface of the operation panel 16 by printing, for example. The second symbol 80 includes at least one of numbers, letters, symbols, and illustrations. The second symbol 80 includes a symbol 80A indicating a wood mode, a symbol 80B indicating a tex (thin) mode, a symbol 80C indicating a tex (thickness) mode, and a bolt mode (bolt 1 mode, bolt 2 mode, bolt 3 mode). ) Is included with the symbol 80D. In embodiments, the symbol 80A is the letter "wood". Symbol 80B is the "thin (tex)" of the character. The symbol 80C is the "thickness (tex)" of the character. Symbol 80D is the letter "bolt".

The second symbol 80 does not have to be a character. The second symbol 80 may be, for example, an illustration.

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

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

The third symbol 81 is provided to identify a plurality of bolt modes (bolt 1 mode, bolt 2 mode, bolt 3 mode), which is a kind of dedicated mode. The third symbol 81 is attached to the surface of the operation panel 16 by printing, for example. The third symbol 81 includes at least one of numbers, letters, symbols, and illustrations. The third symbol 81 includes a symbol 81A indicating the bolt 1 mode, a symbol 81B indicating the bolt 2 mode, and a symbol 81C indicating the bolt 3 mode. In an embodiment, the symbol 81A is the number "1". The symbol 81B is the number "2". The symbol 81C is the number "3".

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

The third symbol 81 is provided in a part of the area 84 of the area 83. 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 first color region 82 is arranged around the striking force switch 64. A part of the second color region 83 is arranged around the dedicated switch 65. Since the striking force switch 64 is located in the region 82 of the first color, the operator can visually associate the striking force switch 64 with the first symbol 79 for identifying the plurality of striking force modes. it can. Since the dedicated switch 65 is arranged in the region 83 of the second color, the operator can visually associate the dedicated switch 65 with the second symbol 80 for identifying the plurality of dedicated modes.

FIG. 13 is a schematic diagram showing a control mode switching method according to the embodiment. By first operating the operating device 66, 11 types of control modes can be switched.

When transitioning from the dedicated mode to the striking force mode, the operator briefly presses the striking force switch 64 as shown by the arrow R1 in FIG. Further, when transitioning from the memory mode to the striking force mode, the operator briefly presses the striking force switch 64 as shown by the arrow R2 in FIG. After transitioning to the striking force mode, each time the striking force switch 64 is briefly pressed, the control modes are the fastest mode, the strong mode, the medium mode, the weak mode, the fastest mode, ... It can be switched in the order of ,.

When transitioning from the memory mode to the dedicated mode, the operator briefly presses the dedicated switch 65 as shown by the arrow R4 in FIG. Further, when transitioning from the striking force mode to the dedicated mode, the operator briefly presses the dedicated switch 65 as shown by the arrow R5 in FIG. After transitioning to the dedicated mode, each time the dedicated switch 65 is briefly pressed, the control modes are wood mode, tex (thin) mode, tex (thick) mode, and bolt 1 mode, as shown by arrow R6 in FIG. , Bolt 2 mode, Bolt 3 mode, Wood mode, ..., In that order.

When transitioning from the striking force mode to the memory mode, the operator briefly presses the mode changeover switch 17 as shown by the arrow R7 in FIG. Further, when transitioning from the dedicated mode to the memory mode, the operator briefly presses the mode changeover switch 17 as shown by the arrow R8 in FIG.

When transitioning from the striking force mode to the memory mode and then to the striking force mode, the operator switches to the striking force mode by short-pressing the mode changeover switch 17 as shown by the arrow R9 in FIG. It can be transitioned.

When transitioning to the dedicated mode after transitioning from the dedicated mode to the memory mode, the operator shifts to the dedicated mode by short-pressing the mode changeover switch 17 as shown by the arrow R10 in FIG. Can be done.

When the operation device 66 is secondly operated, the registration process of a specific operation mode is executed.

For example, when registering one type of striking force mode from four types of striking force modes (fastest mode, strong mode, medium mode, weak mode), the operator has set the striking force mode desired to be registered. In this state, as shown by the arrow R11 in FIG. 13, the striking force switch 64 and the mode changeover switch 17 are pressed and held at the same time. For example, when registering the strong mode, the operator briefly presses the striking force switch 64 to set the strong mode. After setting the strong mode, the operator presses and holds the striking force switch 64 and the mode changeover switch 17 at the same time. As a result, the strong mode is registered as the registration mode.

When registering one type of dedicated mode from six types of dedicated modes (wood mode, tex (thin) mode, tex (thick) mode, bolt 1 mode, bolt 2 mode, bolt 3 mode), the operator registers. With the desired dedicated mode set, as shown by the arrow R12 in FIG. 13, the dedicated switch 65 and the mode changeover switch 17 are pressed and held at the same time. For example, when registering the wood mode, the operator briefly presses the dedicated switch 65 to set the wood mode. After setting the wood mode, the operator presses and holds the dedicated switch 65 and the mode selector switch 17 at the same time. As a result, the wood mode is registered as the registration mode.

In the embodiment, the striking force switch 64 functions as a lighting switch for turning on or off the light 18. For example, when the striking force switch 64 is pressed and held for a long time, the light 18 is turned on or off.

[Control characteristics]
FIG. 14 is a diagram for explaining the control characteristics of the striking force mode according to the embodiment. In FIG. 14, the horizontal axis represents the amount of operation of the trigger member 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 member 14A. The duty ratio of the control signal and the rotation speed of the motor 6 have a one-to-one correspondence. By changing the duty ratio of the control signal, the rotation speed of the motor 6 is changed. That is, the rotation speed of the motor 6 is changed based on the amount of operation of the trigger member 14A. In the example shown in FIG. 14, the operation amount of the trigger member 14A is divided into 10 stages from "1" to "10". As the amount of operation of the trigger member 14A increases, the duty ratio of the control signal increases.

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

At "10", which has the largest amount of operation, the motor 6 rotates at a rotation speed of the upper limit value Ma. At "1", where the amount of operation is the smallest, 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, when the load acting on the anvil 10 becomes large due to the screw tightening operation, the hammer 47 strikes the anvil 10 in the rotational direction.

FIG. 15 is a diagram for explaining the number of rotations of the motor 6 when the hammer 47 hits the anvil 10 in the rotation direction in the striking force mode according to the embodiment. In FIG. 15, the horizontal axis represents the time from the start of the screw tightening operation, and the vertical axis represents the rotation speed of the motor 6.

As shown in FIG. 15, when the load acting on the motor 6 increases due to the screw tightening operation, the rotation speed of the motor 6 decreases at the time point ta. At the time point tb after the time point ta, the hammer 47 starts hitting. When the hammer 47 starts striking, the load acting on the motor 6 decreases, and the rotation speed of the motor 6 fluctuates.

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

As shown in FIG. 16, when the operation of the trigger member 14A is started and the operation amount of the trigger member 14A is increased, the duty ratio of the control signal is increased. The duty ratio of the control signal in the wood mode is smaller than the duty ratio of the control signal in the fastest mode. Immediately after the start of the screw tightening work on the wood, it is necessary to slowly rotate the screw in order to allow the screw to bite into the wood. That is, immediately after the start of driving the motor 6, it is necessary to reduce the rotation speed of the motor 6. Since the duty ratio of the control signal in the wood mode is smaller than the duty ratio of the control signal in the fastest mode, the screw rotates slowly.

When the load acting on the motor 6 becomes large, the rotation speed of the motor 6 decreases at the time point ta. At the time point tb after the time point ta, the hammer 47 starts hitting. The impact detection device 68 detects the number of impacts by the hammer 47. When the motor control unit 77 determines based on the detection signal of the impact detection device 68 that the number of impacts by the hammer 47 exceeds the specified value, the motor control unit 77 increases the duty ratio of the control signal at the time point ct after the time point tb. That is, when the number of hits by the hammer 47 exceeds the specified value, the motor control unit 77 determines that the screw has bitten into the wood and increases the rotation speed of the motor 6. After the screws bite into the wood, the rotation speed of the motor 6 is increased, so that the screw tightening work on the wood is efficiently performed in a short time.

The tex mode is an operation mode for tightening a tex screw on a machining target. The tex (thickness) mode is selected when the thickness of the object to be processed is thick. The tex (thin) mode is selected when the thickness of the object to be processed is thin. The operator can arbitrarily select the tex (thick) mode and the tex (thin) mode.

FIG. 17 is a diagram for explaining the control characteristics of the tex (thickness) mode according to the embodiment. In FIG. 17, the horizontal axis represents the time from the start of the screw tightening operation, and the vertical axis represents the rotation speed of the motor 6.

As shown in FIG. 17, when the operation of the trigger member 14A is started and the operation amount of the trigger member 14A is increased, the duty ratio of the control signal is increased. When the load acting on the motor 6 becomes large, the rotation speed of the motor 6 decreases at the time point ta. At the time point tb after the time point ta, the hammer 47 starts hitting. The impact detection device 68 detects the number of impacts by the hammer 47. When the motor control unit 77 determines based on the detection signal of the impact detection device 68 that the number of impacts by the hammer 47 exceeds the specified value, the motor control unit 77 reduces the duty ratio of the control signal at the time point ct after the time point tb.

Although not shown, in the tex (thin) mode, the motor control unit 77 stops the drive of the motor 6 when it is determined that the number of hits by the hammer 47 exceeds the specified value.

The bolt mode is a control mode for performing a bolt tightening operation or a bolt removing operation. The bolt mode is also selected when tightening or removing the nut. In the following description, a case where bolt tightening work or bolt removal work is performed will be described.

When the bolt tightening work is carried out, the motor 6 is rotated in the forward rotation direction. When the bolt removal work is carried out, the motor 6 is rotated in the reverse direction.

FIG. 18 is a diagram for explaining the control characteristics of the bolt mode in the bolt tightening operation according to the embodiment. In FIG. 18, the horizontal axis represents the time from the start of the bolt tightening work, and the vertical axis represents the rotation speed of the motor 6.

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

In the bolt mode, the rotation speed of the motor 6 is set to reach the upper limit value Ma even if the operation amount of the trigger member 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 value Ma even if the operation amount of the trigger member 14A is small.

When rotating a bolt, a tip tool that fits into the head of the bolt is used. Therefore, it is unlikely that the tip tool will come off the bolt. Therefore, in the bolt mode, the rotation speed of the motor 6 is set to reach the upper limit value Ma even if the operation amount of the trigger member 14A is small. As a result, the bolt tightening work is efficiently performed in a short time.

When the motor control unit 77 determines that the hammer 47 has started the impact based on the detection signal of the impact detection device 68, the motor control unit 77 stops driving the motor 6.

FIG. 19 is a diagram for explaining the control characteristics of the bolt mode in the bolt removing operation according to the embodiment. In FIG. 19, the horizontal axis represents the time from the start of the bolt removal work, and the vertical axis represents the rotation speed of the motor 6.

In the bolt removal work, a large load acts on the motor 6 immediately after the start of driving the motor 6. Therefore, at the time point td immediately after the start of driving the motor 6, the hammer 47 starts striking.

When the bolt is loosened by the impact of the hammer 47, the load acting on the motor 6 is reduced. When the load acting on the motor 6 decreases, the impact by the hammer 47 ends. The rotation speed of the motor 6 increases from the time when the impact by the hammer 47 is completed. When the impact is not detected for a predetermined time Tf from the time when the impact by the hammer 47 is completed, the motor control unit 77 stops driving the motor 6 or reduces the rotation speed of the motor 6. By stopping the drive of the motor 6 or reducing the rotation speed of the motor 6, it is possible to prevent the bolt from falling from the tip tool.

[Notification device]
Next, the operation of the notification device 67 will be described. The notification control unit 78 changes the operation patterns of the plurality of operation light emitters 72 based on the control mode set by the mode command. The notification control unit 78 changes the operation pattern of the identification light emitter 73 based on the control mode set by the mode command.

The plurality of light emitters 71 are associated with the set control mode. The specific light emitter 71 corresponding to the control mode means a light emitter 71 that mainly operates 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 medium mode is the second operation light emitter 72B. The specific operation light emitter 72 corresponding to the weak mode is the first operation 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 operation light emitter 72 corresponding to the tex (thin) mode is the second operation light emitter 72B. The specific operation light emitter 72 corresponding to the tex (thickness) mode is the third operation 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 the mode command is output will be described with reference to FIGS. 20 and 21. FIG. 20 is a transition diagram showing a state of the notification device 67 in the setting of the striking force mode according to the embodiment. FIG. 21 is a transition diagram showing a state of the notification device 67 in the setting of the dedicated mode according to the embodiment.

In the striking force mode, as shown by the arrow R3 in FIG. 13, a mode command is output from the command output unit 76 each time the striking force switch 64 is briefly pressed. The striking force mode is switched in the order of fastest mode, strong mode, medium mode, weak mode, fastest mode, and so on.

In the dedicated mode, as shown by the arrow R6 in FIG. 13, a mode command is output from the command output unit 76 each time the dedicated switch 65 is briefly pressed. The dedicated mode can be switched in the order of wood mode, tex (thin) mode, tex (thick) mode, bolt 1 mode, bolt 2 mode, bolt 3 mode, wood mode, and so on.

As shown in FIG. 20, the notification control unit 78 controls the identification light emitter 73 to be in the fifth state when the striking force mode is set by the mode command. That is, the notification control unit 78 controls the identification light emitter 73 to be in the fifth state in each of the fastest mode, the strong mode, the medium mode, and the weak mode. In the embodiment, the fifth state includes a light-off state. The notification control unit 78 controls the identification light emitter 73 so that it is turned off when each of the fastest mode, the strong mode, the medium mode, and the weak mode is set.

The identification light emitter 73 operates to distinguish between the striking force mode and the dedicated mode. When the identification light emitter 73 is turned off, the operator can recognize that the striking force mode is set.

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

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

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

When the strong mode is set by the mode command, the notification control unit 78 controls the third operation light emitter 72C corresponding to the strong mode so as to be in the third state (continuous lighting state).

Further, when the strong mode is set, the notification control unit 78 not only puts the third operation light emitter 72C but also the first operation light emitter 72A and the second operation light emitter 72B into the third state (continuous lighting state). Control to be. Further, the notification control unit 78 controls so that the fourth operation light emitter 72D is turned off when the strong mode is set.

When the middle mode is set by the mode command, the notification control unit 78 controls the second operation light emitter 72B corresponding to the middle mode so as to be in the third state (continuous lighting state).

Further, the notification control unit 78 controls not only the second operation light emitter 72B but also the first operation light emitter 72A to be in the third state (continuous lighting state) when the medium mode is set. Further, the notification control unit 78 controls so that each of the third operation light emitter 72C and the fourth operation light emitter 72D is turned off when the medium mode is specified.

When the weak mode is set by the mode command, the notification control unit 78 controls the first operation light emitter 72A corresponding to the weak mode to be in the third state (continuous lighting state).

Further, the notification control unit 78 controls each of 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 weak mode is set.

As shown in FIG. 21, the notification control unit 78 controls the identification light emitter 73 to be in the sixth state different from the fifth state when the dedicated mode is set by the mode command. That is, the notification control unit 78 sets the identification light emitter 73 to the sixth state in each of the wood mode, the tex (thin) mode, the tex (thick) mode, the bolt 1 mode, the bolt 2 mode, and the bolt 3 mode. To control. In the embodiment, the sixth state includes a continuous lighting state. In the notification control unit 78, when each of the wood mode, the tex (thin) mode, the tex (thick) mode, the bolt 1 mode, the bolt 2 mode, and the bolt 3 mode is set, the identification light emitter 73 is continuously lit. Control to be.

The identification light emitter 73 operates to distinguish between the striking force mode and the dedicated mode. When the identification light emitter 73 is continuously lit, the operator can recognize that the dedicated mode is set.

The notification control unit 78 is a plurality of operation light emitters 72 based on the set dedicated modes (wood mode, tex (thin) mode, tex (thick) mode, bolt 1 mode, bolt 2 mode, bolt 3 mode). Change the operation pattern. As a result, the notification device 67 can notify each of the plurality of dedicated modes.

When the wood mode is set by 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 (continuous lighting state).

Further, the notification control unit 78 controls each of 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 wood mode is set.

When the tex (thin) mode is set by the mode command, the notification control unit 78 controls the second operation light emitter 72B corresponding to the tex (thin) mode to be in the third state (continuous lighting state).

Further, the notification control unit 78 controls so that each of the first operation light emitter 72A, the third operation light emitter 72C, and the fourth operation light emitter 72D is turned off when the tex (thin) mode is set. To do.

When the tex (thickness) mode is set by the mode command, the notification control unit 78 controls the third operation light emitter 72C corresponding to the tex (thickness) mode to be in the third state (continuous lighting state).

Further, the notification control unit 78 controls so that each of the first operation light emitter 72A, the second operation light emitter 72B, and the fourth operation light emitter 72D is turned off when the tex (thickness) mode is set. To do.

When the bolt 1 mode is set by the mode command, the notification control unit 78 puts each of the first operation light emitter 72A and the fourth operation light emitter 72D corresponding to the bolt 1 mode into the third state (continuous lighting state). To control.

Further, the notification control unit 78 controls so that each of the second operation light emitter 72B and the third operation light emitter 72C is turned off when the bolt 1 mode is set.

When the bolt 2 mode is set by the mode command, the notification control unit 78 puts each of the second operation light emitter 72B and the fourth operation light emitter 72D corresponding to the bolt 2 mode into the third state (continuous lighting state). To control.

Further, the notification control unit 78 controls so that each of the first operation light emitter 72A and the third operation light emitter 72C is turned off when the bolt 2 mode is set.

When the bolt 3 mode is set by the mode command, the notification control unit 78 puts each of the third operation light emitter 72C and the fourth operation light emitter 72D corresponding to the bolt 3 mode into the third state (continuous lighting state). To control.

Further, the notification control unit 78 controls so that each of the first operation light emitter 72A and the second operation light emitter 72B is turned off when the bolt 3 mode is set.

As shown in FIG. 21, in the dedicated mode, the fourth operating light emitter 72D functions as a second identifying light emitting device that operates to identify a plurality of dedicated modes. Depending on the combination of the state of the identification light emitter 73 (first identification light emitter) and the state of the fourth operation light emitter 72D (second identification light emitter), the wood mode, the tex (thin) mode, and the tesque (thick) mode can be used. , Bolt mode (Bolt 1 mode, Bolt 2 mode, and Bolt 3 mode).

In the dedicated mode, the identification light emitter 73 is in the sixth state (continuous lighting state), and the fourth operation light emitting device 72D is in the fifth state (lighting out state), so that the operator can change the set dedicated mode. It can be recognized that it is not in the bolt mode (bolt 1 mode, bolt 2 mode, bolt 3 mode). When the identification light emitter 73 is continuously lit and the fourth operation light emitter 72D is off, any one of the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C is in the third state. By being in the (continuous lighting state), the operator can recognize that any one of the wood mode, the tex (thin) mode, and the tex (thick) mode is set.

In the dedicated mode, the identification light emitter 73 is in the sixth state (continuous lighting state), and the fourth operation light emitter 72D is in the sixth state (continuous lighting state), so that the operator can set the dedicated mode. Can be recognized as being in bolt mode (bolt 1 mode, bolt 2 mode, bolt 3 mode). While each of the identification light emitter 73 and the fourth operation light emitter 72D is continuously lit, any one of the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C is in the third state (continuously). By the 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.

In the embodiment, the fifth state is the extinguished state and the sixth state is the continuous lighting state. For example, the fifth state may be a continuous lighting state, and the sixth state may be an extinguishing state.

Next, the operation of the notification device 67 when the registration command is output will be described with reference to FIGS. 22 to 31. FIG. 22 is a transition diagram showing a state of the notification device 67 in the registration process of the fastest mode and the setting of the memory mode according to the embodiment. FIG. 23 is a transition diagram showing a state of the notification device 67 in the strong mode registration process and the memory mode setting according to the embodiment. FIG. 24 is a transition diagram showing a state of the notification device 67 in the registration process of the medium mode and the setting of the memory mode according to the embodiment. FIG. 25 is a transition diagram showing a state of the notification device 67 in the weak mode registration process and the memory mode setting according to the embodiment. FIG. 26 is a transition diagram showing a state of the notification device 67 in the wood mode registration process and the memory mode setting according to the embodiment. FIG. 27 is a transition diagram showing a state of the notification device 67 in the tex (thin) mode registration process and the memory mode setting according to the embodiment. FIG. 28 is a transition diagram showing a state of the notification device 67 in the tex (thickness) mode registration process and the memory mode setting according to the embodiment. FIG. 29 is a transition diagram showing a state of the notification device 67 in the registration process of the bolt 1 mode and the setting of the memory mode according to the embodiment. FIG. 30 is a transition diagram showing a state of the notification device 67 in the registration process of the bolt 2 mode and the setting of the memory mode according to the embodiment. FIG. 31 is a transition diagram showing a state of the notification device 67 in the registration process of the bolt 3 mode and the setting of the memory mode according to the embodiment.

When registering the striking force mode, as shown by the arrow R11 in FIG. 13, the striking force switch 64 and the mode changeover switch 17 are pressed and held at the same time while the striking force mode desired to be registered is set. .. When setting the memory mode including the striking force mode, the mode changeover switch 17 is briefly pressed as shown by the arrow R7 in FIG.

When registering the dedicated mode, as shown by the arrow R12 in FIG. 13, the dedicated switch 65 and the mode changeover switch 17 are pressed and held at the same time while the dedicated mode to be registered is set. When setting the memory mode including the dedicated mode, the mode changeover switch 17 is briefly pressed as shown by the arrow R8 in FIG.

The notification control unit 78 controls the light emitter 71 to be in the first state when the registration process is performed. The notification control unit 78 controls the light emitter 71 to be in the second state when the memory mode is set.

The first state includes first blinking the particular light emitter 71 corresponding to the registration mode. The second state includes second blinking the particular light emitter 71 corresponding to the registration mode. In the embodiment, the first blinking means that the specific light emitter 71 blinks at the first time interval. The second blinking means that the specific light emitter 71 blinks at a second time interval longer than the first time interval. That is, the first blinking is a high-speed blinking. The second blinking is a low-speed blinking.

As shown in FIGS. 22, 23, 24, and 25, the notification control unit 78 controls the identification light emitter 73 to be turned off in each of the striking force mode registration process and the memory mode setting. To do.

As shown in FIG. 22, when the registration process of the strongest mode is performed, the fastest mode is set. When the fastest mode is set, the notification control unit 78 puts each of 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 into the third state (continuous). Control so that it is in the lit state).

After the fastest mode is set, the striking force switch 64 and the mode changeover switch 17 are pressed and held at the same time to start the registration process of the fastest mode. In the registration process, the notification control unit 78 controls the fourth operation light emitter 72D corresponding to the fastest mode so as to be in the first state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C is turned off.

When the memory mode including the fastest mode is set, the notification control unit 78 controls the fourth operation light emitter 72D corresponding to the fastest mode to be in the second state (low-speed blinking state). Further, the notification control unit 78 controls each of the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C to be in a continuous lighting state.

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 sets each of the first operation light emitter 72A, the second operation light emitter 72B, and the third operation light emitter 72C to the third state (continuous lighting state). Control.

After the strong mode is set, the striking force switch 64 and the mode changeover switch 17 are pressed and held at the same time to start the registration process of the strong mode. In the registration process, the notification control unit 78 controls the third operation light emitter 72C corresponding to the strong mode so as to be in the first blinking state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the first operation light emitter 72A, the second operation light emitter 72B, and the fourth operation light emitter 72D is turned off.

When the memory 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). Further, the notification control unit 78 controls each of the first operation light emitter 72A and the second operation light emitter 72B so as to be in a continuous lighting state.

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

After the middle mode is set, the striking force switch 64 and the mode changeover switch 17 are pressed and held at the same time to start the registration process of the middle mode. In the registration process, the notification control unit 78 controls the second operation light emitter 72B corresponding to the medium mode so as to be in the first state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the first operation light emitter 72A, the third operation light emitter 72C, and the fourth operation light emitter 72D is turned off.

When the memory mode including the medium mode is set, the notification control unit 78 controls the second operation light emitter 72B corresponding to the medium mode to be in the second state (low-speed blinking state). Further, the notification control unit 78 controls the first operation light emitter 72A so as to be in a continuous lighting state.

As shown in FIG. 25, when the weak mode registration process is performed, the weak mode is set. When the weak mode is set, the notification control unit 78 controls the first operation light emitter 72A so as to be in the third state (continuous lighting state).

After the weak mode is set, the striking force switch 64 and the mode changeover switch 17 are pressed and held at the same time to start the weak mode registration process. In the registration process, the notification control unit 78 controls the first operation light emitter 72A corresponding to the weak mode to be in the first state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D is turned off.

When the memory 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 striking force mode registration process is performed, the specific light emitter 71 corresponding to the registration mode is controlled to be in the first state (high-speed blinking state), and the memory mode is set by the mode command. In this case, the specific light emitter 71 corresponding to the memory mode is controlled to be in the second state (slow blinking state) different from the first state. As a result, the worker can recognize whether or not the registration process is being performed. In addition, the operator can recognize whether or not the memory mode is set.

Further, when the operation mode is set by the mode command, the notification control unit 78 controls so that the specific light emitter 71 corresponding to the set operation mode is in the third state (continuous lighting state), and the mode command is given. When the memory mode is set by, the specific light emitter 71 corresponding to the set memory mode is controlled to be in the fourth state (slow blinking state).

For example, as described with reference to FIG. 20, when the fastest mode is set by the mode command, the fourth operation light emitter 72D corresponding to the fastest mode is controlled to be in the third state (continuous lighting state). To. As described with reference to FIG. 22, when the memory mode including the fastest mode is set by the mode command, the fourth operation light emitter 72D corresponding to the memory mode (fastest mode) is in the fourth state (slow blinking state). Is controlled to be. Thereby, the operator can identify whether the set fastest mode is the operation mode or the memory mode.

Similarly, when the strong mode is set by the mode command, the third operation light emitter 72C corresponding to the strong mode is controlled to be in the third state (continuous lighting state), and the memory mode including the strong mode is controlled by the mode command. When is set, the third operation light emitter 72C corresponding to the memory mode (strong mode) is controlled to be in the fourth state (slow blinking state). The same applies to each of the medium mode and the weak mode. The operator can identify whether the set striking force mode is an operation mode or a memory mode.

The second state and the fourth state may be the same state or different states. It suffices if the third state and the fourth state are different.

As shown in FIGS. 26, 27, 28, 29, 30 and 31, the notification control unit 78 controls the identification light emitter 73 to be in the seventh state in the registration process of the dedicated mode. .. Further, in the setting of the memory mode including the dedicated mode, the notification control unit 78 controls the identification light emitter 73 so as to be in the eighth state. The seventh state and the eighth state are different. In the embodiment, the seventh state is a fast blinking state. The eighth state is a continuous lighting state.

As shown in FIG. 26, when the wood mode registration process is performed, the wood mode is set. When the wood mode is set, the notification control unit 78 controls the first operation light emitter 72A so as to be in the third state (continuous lighting state).

After the wood mode is set, the dedicated switch 65 and the mode changeover switch 17 are pressed and held at the same time to start the wood mode registration process. In the registration process, the notification control unit 78 controls the first operation light emitter 72A corresponding to the wood mode to be in the first state (high-speed blinking state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D is turned off.

When the memory mode including the wood mode is set, the notification control unit 78 controls the first operation light emitter 72A corresponding to the wood mode to be in the second mode (low-speed blinking state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the eighth state (continuous lighting state).

As shown in FIG. 27, when the tex (thin) mode registration process is performed, the tex (thin) mode is set. When the tex (thin) mode is set, the notification control unit 78 controls the second operation light emitter 72B so as to be in the third state (continuous lighting state).

After the tex (thin) mode is set, the dedicated switch 65 and the mode selector switch 17 are pressed and held at the same time to start the tex (thin) mode registration process. In the registration process, the notification control unit 78 controls the second operation light emitter 72B corresponding to the tex (thin) mode to be in the first state (high-speed blinking state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the first operation light emitter 72A, the third operation light emitter 72C, and the fourth operation light emitter 72D is turned off.

When the memory mode including the tex (thin) mode is set, the notification control unit 78 controls the second operation light emitter 72B corresponding to the tex (thin) mode to be in the second mode (slow blinking state). .. Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the eighth state (continuous lighting state).

As shown in FIG. 28, when the tex (thickness) mode registration process is performed, the tex (thickness) mode is set. When the tex (thickness) mode is set, the notification control unit 78 controls the third operation light emitter 72C to be in the third state (continuous lighting state).

After the tex (thickness) mode is set, the dedicated switch 65 and the mode selector switch 17 are pressed and held at the same time to start the tex (thickness) mode registration process. In the registration process, the notification control unit 78 controls the third operation light emitter 72C corresponding to the tex (thickness) mode to be in the first state (high-speed blinking state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the first operation light emitter 72A, the second operation light emitter 72B, and the fourth operation light emitter 72D is turned off.

When the memory mode including the tex (thickness) mode is set, the notification control unit 78 controls the third operation light emitter 72C corresponding to the tex (thickness) mode to be in the second mode (slow blinking state). .. Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the eighth state (continuous lighting state).

As shown in FIG. 29, when the bolt 1 mode registration process is performed, the bolt 1 mode is set. When the bolt 1 mode is set, the notification control unit 78 controls each of the first operation light emitter 72A and the fourth operation light emitter 72D to be in the third state (continuous lighting state).

After the bolt 1 mode is set, the dedicated switch 65 and the mode changeover switch 17 are pressed and held at the same time to start the registration process of the bolt 1 mode. 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). Further, the notification control unit 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the second operation light emitter 72B and the third operation light emitter 72C is turned off.

When the memory 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 so as to be in the second mode (low-speed blinking state). Further, the notification control unit 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to be in the eighth state (continuous lighting state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the eighth state (continuous lighting 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 each of the second operation light emitter 72B and the fourth operation light emitter 72D to be in the third state (continuous lighting state).

After the bolt 2 mode is set, the dedicated switch 65 and the mode changeover switch 17 are pressed and held at the same time to start the registration process of the bolt 2 mode. 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 (first blinking state, high-speed blinking state). Further, the notification control unit 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the first operation light emitter 72A and the third operation light emitter 72C is turned off.

When the memory mode including the bolt 2 mode is set, the notification control unit 78 controls the second operation light emitter 72B corresponding to the bolt 2 mode so as to be in the second mode (low-speed blinking state). Further, the notification control unit 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to be in the eighth state (continuous lighting state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the eighth state (continuous lighting 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 each of the third operation light emitter 72C and the fourth operation light emitter 72D to be in the third state (continuous lighting state).

After the bolt 3 mode is set, the dedicated switch 65 and the mode changeover switch 17 are pressed and held at the same time to start the registration process of the bolt 3 mode. In the registration process, the notification control unit 78 controls the third operation light emitter 72C corresponding to the bolt 3 mode to be in the first state (high-speed blinking state). Further, the notification control unit 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the seventh state (high-speed blinking state). Further, the notification control unit 78 controls so that each of the first operation light emitter 72A and the second operation light emitter 72B is turned off.

When the memory mode including the bolt 3 mode is set, the notification control unit 78 controls the third operation light emitter 72C corresponding to the bolt 3 mode so as to be in the second mode (low-speed blinking state). Further, the notification control unit 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to be in the eighth state (continuous lighting state). Further, the notification control unit 78 controls the identification light emitter 73 so as to be in the eighth state (continuous lighting state).

In this way, when the registration process of the dedicated mode is executed, the specific light emitter 71 corresponding to the registration mode is controlled to be in the first state (high-speed blinking state), and the memory mode is set by the mode command. In this case, the specific light emitter 71 corresponding to the memory mode is controlled to be in a second state (slow blinking state) different from the first state. As a result, the worker can recognize whether or not the registration process is being performed. In addition, the operator can recognize whether or not the memory mode is set.

Further, when the operation mode is set by the mode command, the notification control unit 78 controls so that the specific light emitter 71 corresponding to the set operation mode is in the third state (continuous lighting state), and the mode command is given. When the memory mode is set by, the specific light emitter 71 corresponding to the set memory mode is controlled to be in the fourth state (slow blinking state).

For example, as described with reference to FIG. 21, when the wood mode is set by the mode command, the first operation light emitter 72A corresponding to the wood mode is controlled to be in the third state (continuous lighting state). To. As described with reference to FIG. 26, when the memory mode including the wood mode is set by the mode command, the first operation light emitter 72A corresponding to the memory mode (wood mode) is in the fourth state (slow blinking state). Is controlled to be. Thereby, the operator can identify whether the set wood mode is the operation mode or the memory mode.

Similarly, when the tex (thin) mode is set by the mode command, the specific second operation light emitter 72B corresponding to the tex (thin) mode is controlled to be in the third state (continuous lighting state), and the mode is set. When the memory mode including the tex (thin) mode is set by the command, the specific second operation light emitter 72B corresponding to the memory mode (tex (thin) mode) is set to the fourth state (slow blinking state). Be controlled. The same applies to each of the tex (thickness) mode, the bolt 1 mode, the bolt 2 mode, and the bolt 3 mode. The operator can identify whether the set dedicated mode is the operation mode or the memory mode.

[Deformation suppressing member]
FIG. 32 is an enlarged cross-sectional view of the lower part of the power tool 1 according to the embodiment. FIG. 33 is an enlarged cross-sectional view of the lower portion of the power tool 1 according to the embodiment. As shown in FIGS. 4, 32, and 33, the controller accommodating unit 23 accommodates the controller 13 and the controller case 62, respectively.

The controller case 62 has a bottom plate 62A and a wall plate 62B protruding upward from the peripheral edge of the bottom plate. The outer shape of the bottom plate 62A is rectangular. The wall plate 62B includes a front wall plate 62Bf projecting upward from the front end portion of the bottom plate 62A, a rear wall plate 62Bb projecting upward from the rear end portion of the bottom plate 62A, and a left wall projecting upward from the left end portion of the bottom plate 62A. A plate 62Bl and a front wall plate 62Bf projecting upward from the right end of the bottom plate 62A are included.

An opening is provided in the upper part 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 power tool 1 includes a deformation suppressing member 85 arranged near the boundary portion 2C or the boundary portion 2C between the grip portion 22 and the controller accommodating portion 23. The controller accommodating 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 the deformation of the housing 2.

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

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

The deformation suppressing member 85 is arranged in the upper part of 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 suppressing member 85 supports the housing 2 from the inside.

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

In the left-right direction, the dimensions of the deformation suppressing member 85 and the dimensions of the controller case 62 are substantially equal. In the left-right direction, the size of the deformation suppressing member 85 may be larger than the size of the controller case 62. As shown in FIG. 33, the left end portion of the deformation suppressing member 85 is arranged above the left wall plate 62Bl of the controller case 62. The right end portion of the deformation suppressing member 85 is arranged above the right 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 part A in FIG. 33.

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

The cushion layer 86 includes at least a part of the controller housing portion 23 of the housing 2. At least a part of the inner surface of the controller accommodating portion 23 projects toward the center of the internal space of the controller accommodating portion 23. A protruding portion protruding from the inner surface of the controller accommodating portion 23 is sandwiched between the deformation suppressing member 85 and the upper end portion of the wall plate 62B.

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

The cushion layer 86 may be separate from the housing 2. Further, the cushion layer 86 may be formed of rubber or may be formed of a thermoplastic elastomer (TPE: Thermoplastic Elastomers).

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

Further, the controller housing unit 23 holds the panel holding unit 23C, the front case holding unit 23D, the front block holding unit 23E, the rear block holding unit 23F, the horizontal case holding unit 23A, the contact portion 23G, and the horizontal block holding unit. It has a part 23B.

The panel holding portion 23C holds the front portion of the operation panel 16 from below. The front case holding portion 23D holds the front portion of the controller case 62 from below. The front block holding portion 23E holds the front portion of the terminal block 5A from below. The rear block holding portion 23F fits into a recess provided in the lower portion of the rear portion of the terminal block 5A. The contact portion 23G contacts at least a part of the upper surface of the deformation suppressing member 85. The horizontal case holding portion 23A holds each of the left wall plate 62Bl and the right wall plate 62Br from below. The horizontal block holding portion 23B holds each of the left end portion and the right end portion of the terminal block 5A from the lower side.

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 FIGS. 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 via a connecting portion 87. The connecting portion 87 is made of synthetic resin. The connecting portion 87 is integrally molded with the operation panel 16. The connecting portion 87 is arranged at least a part around the deformation suppressing member 85. In the embodiment, the connecting portion 87 is connected to each of 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 connecting 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 and the connecting portion 87 of the operation panel 16 are manufactured by, for example, injection molding. With the deformation suppressing member 85 arranged inside the injection molding mold, the synthetic resin is injected inside the mold, so that the operation panel 16 and the connecting portion 87 are integrally molded, and the connecting portion 87 is formed. It 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 contacts 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 the connecting portion 87. The deformation suppressing member 85 supports the housing 2 from the inside via the connecting portion 87.

The controller accommodating portion 23 has an opening 63 in which the operation panel 16 is arranged. The opening 63 is provided on the upper surface of the controller accommodating portion 23 in front of the grip portion 22. The opening 63 is provided in front of the boundary portion 2C.

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

The deformation suppressing member 85 suppresses the deformation of the housing 2 at the boundary portion 2C. By suppressing the deformation of the housing 2, damage to the controller 13 and peripheral parts of the controller 13 is suppressed.

FIG. 37 is a schematic view showing a state in which an external force is applied to the power tool 1J according to the comparative example. The power tool 1J according to the comparative example does not have the deformation suppressing member 85. When the power tool 1J receives an external force due to dropping, at least a part of the housing 2 may be deformed. The boundary portion 2C between the grip portion 22 and the controller accommodating portion 23 is bent. Therefore, when the power tool 1J receives an external force, there is a high possibility that the power tool 1J will be deformed at the boundary portion 2C. When the housing 2 is deformed so as to bend 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 the peripheral parts of the controller 13. As a result, at least one of the controller 13 and the peripheral parts of the controller 13 may be damaged. As a peripheral component of the controller 13, a component housed in the controller accommodating portion 23 is exemplified.

FIG. 38 is a schematic view showing a state in which an external force acts on the power tool 1 according to the embodiment. The power tool 1 according to the embodiment has a deformation suppressing member 85 provided at the boundary portion 2C. Therefore, deformation of the housing 2 is suppressed in the vicinity of the boundary portion 2C or the boundary portion 2C.

FIG. 39 is a diagram schematically showing the deformation suppressing member 85 according to the embodiment. As shown in FIG. 39, the left end portion of the deformation suppressing member 85 is arranged above the left wall plate 62Bl of the controller case 62. The right end portion of the deformation suppressing member 85 is arranged above the right wall plate 62Br of the controller case 62. The deformation suppressing member 85 is arranged so as to be hung on the left wall plate 62Bl and the right wall plate 62Br. In the example shown in FIG. 39, the deformation suppressing member 85 comes into direct contact with each of the left wall plate 62Bl and the right wall plate 62Br.

The deformation suppressing member 85 is arranged so as to cover a part of the opening at the upper part of the controller case 62. Therefore, even if the inner surface of the housing 2 is deformed so as to approach the controller 13, the inner surface of the housing 2 comes into contact with the deformation suppressing member 85 before coming into contact with the controller 13. Therefore, the inner surface of the housing 2 is prevented from coming into contact with the controller 13. Therefore, the controller 13 is sufficiently protected, and damage to the controller 13 is suppressed. In addition, damage to peripheral parts of the controller 13 is suppressed.

[fan]
Next, the fan 12 will be described. As shown in FIGS. 4 and 5, the fan 12 is fixed to at least a part of the rotor 27. The fan 12 is fixed to the rotor shaft 32 of the rotor 27. Due to the rotation of the rotor shaft 32, the fan 12 rotates together with the rotor shaft 32. The fan 12 rotates about the rotation axis AX. The fan 12 is arranged behind the motor 6.

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

The fan 12 is a centrifugal fan. The fan 12 is arranged in front of the main plate portion 88, the tubular portion 89 projecting forward from the central portion of the main plate portion 88, the plurality of blade portions 91 arranged around the tubular portion 89, and the blade portion 91. It has a ring-shaped baffle portion 90.

The main plate portion 88 has a disk shape. The main plate portion 88 is arranged behind the blade portion 91. An opening in which the rotor shaft 32 is arranged is provided in the central portion of the main plate portion 88. The opening of the main plate portion 88 and the space inside the cylinder portion 89 are connected. The rotor shaft 32 is inserted into the space inside the tubular portion 89.

A plurality of blade portions 91 are provided around the tubular 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 portion 91 includes an inner portion 91A extending radially outward from the front portion of the tubular portion 89, and an outer portion 91B arranged radially outside the inner portion 91A. The outer portion 91B is provided so as to be recessed rearward from the inner portion 91A. The outer portion 91B is arranged behind the surface 90A of the baffle portion 90.

The tubular portion 89 is arranged inside the baffle portion 90. The bush 61 is arranged inside the tubular portion 89.

The baffle portion 90 is arranged in front of the main plate portion 88. The baffle portion 90 has a ring shape. The baffle portion 90 has a plate shape. The center of the baffle portion 90, the center of the tubular portion 89, and the rotation axis AX coincide with each other. The baffle portion 90 is connected to the peripheral edge portion on 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.

With the fan 12 fixed to the rotor shaft 32, the baffle portion 90 faces at least a portion of the stator 26. The baffle portion 90 has a front surface 90A facing forward and a back surface 90B facing backward, which is the opposite direction of the surface 90A. With the fan 12 fixed to the rotor shaft 32, the surface 90A faces at least a portion of the stator 26.

The front surface 90A and the back surface 90B are parallel. Further, each of the front surface 90A and the back surface 90B is flat. In the embodiment, the baffle portion 90 is a parallel flat plate. With the fan 12 fixed to the rotor shaft 32, each of the front surface 90A and the back surface 90B is orthogonal to the rotation axis AX.

FIG. 43 is a cross-sectional view showing a part of the fan 12 and the 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 baffle portion 90 is arranged behind the motor 6 so as to face the stator core 28. In an embodiment, the stator 26 has a rear insulator 30 supported by a 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 via the rear insulator 30.

The inner diameter Da of the baffle portion 90 is equal to the inner diameter Dc of the stator core 28. 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 in the portion where the teeth are not provided. That is, the inner diameter Dc of the stator core 28 means the maximum value of the inner diameter of the stator core 28.

The fan 12 creates an air flow for cooling the motor 6. As the rotor shaft 32 rotates, the fan 12 rotates together with the rotor shaft 32. As the fan 12 rotates, the air in the external space of the housing 2 flows into the internal space of the housing 2 through the intake port 19. The air that has flowed into the internal space of the housing 2 circulates in the internal space of the housing 2 while contacting the motor 6. As a result, the motor 6 is cooled. As shown by the arrow Fa in FIG. 43, at least a part of the air in contact with the motor 6 flows backward toward the fan 12. The air from the motor 6 flows into the inside of the baffle portion 90. The fan 12 rotates so that the air flowing into the inside of the baffle portion 90 flows between the plurality of blade portions 91 and then flows out from between the plurality of blade portions 91 in the radial direction. The air flowing out from between the plurality of blades 91 in the radial direction passes through the first exhaust port 20B, then passes through the second exhaust port 20A, and is discharged to the external space of the housing 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 an exhaust port 20B1, an exhaust port 20B2, and an exhaust port 20B3 arranged in the front-rear direction. The exhaust port 20B1 is arranged at the frontmost position, the exhaust port 20B2 is arranged at the front side after the exhaust port 20B1, and the exhaust port 20B3 is arranged at the rearmost position. In the front-rear direction, the exhaust port 20B1 and at least a part of the baffle portion 90 are arranged 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 arranged at the same position.

As shown in FIG. 6, the second exhaust port 20A has 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 arranged at the frontmost position, the exhaust port 20A2 is arranged at the front after the exhaust port 20A1, the exhaust port 20A3 is arranged at the front after the exhaust port 20A2, and the exhaust port 20A4 is arranged at the rearmost position. The exhaust port 20A1 is also arranged in front of the baffle portion 90. In the front-rear direction, the exhaust port 20A4 and at least a part of the main plate portion 88 are arranged at the same position.

By providing the baffle portion 90, the generation of an air vortex is suppressed at least in a part around the fan 12. In the absence of the baffle portion 90, the rotation of the fan 12 increases the likelihood that an air vortex will be generated, for example, at the peripheral edge of the front surface of the blade portion 91. When an air vortex is generated, the flow rate of air passing through the fan 12 may decrease. Further, when an air vortex is generated, the flow of air flowing outward from the fan 12 in the radial direction may be obstructed. As a result, the motor 6 may not be sufficiently cooled.

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

[spindle]
Next, the spindle 8 will be described. FIG. 44 is a perspective view showing the spindle 8 according to the embodiment. FIG. 45 is a perspective view showing the spindle 8, the ball 48, and the hammer 47 according to the embodiment.

As shown in FIGS. 5, 44, and 45, the spindle 8 includes a flange portion 44, a rod portion 45 projecting forward from the flange portion 44, and a spindle groove 50 in which at least a part of the ball 48 is arranged. Has.

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

Further, the spindle 8 has a first supply port 93 for supplying lubricating oil and a second supply port 92 for supplying lubricating oil. Each of the first supply port 93 and the second supply port 92 is provided on the rod portion 45.

As described with reference to FIG. 5, the spindle 8 has an internal space 94 in which the lubricating oil is housed. The first supply port 93 is arranged radially outside the internal space 94. The second supply port 92 is arranged radially outside the internal space 94. The first supply port 93 is connected to the internal space 94 via the first flow path 93R. The second supply port 92 is connected to the internal space 94 via the second flow path 92R. The first supply port 93 includes a radial outer opening of the first flow path 93R. The second supply port 92 includes a radial outer opening of the second flow path 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 a through hole that passes through the central axis (rotation axis AX) of the spindle 8 and penetrates the rod portion 45. The first supply port 93 is provided at two locations on the outer surface of the rod portion 45. The second flow path 92R includes a through hole that passes through the central axis (rotation axis AX) of the spindle 8 and penetrates the rod portion 45. The second supply port 92 is provided at two locations on the outer surface of the rod portion 45.

The ball 48 is arranged on the radial outer side of the first supply port 93. The washer 54 is arranged on the radial outer side of the first supply port 93. The first supply port 93 may be arranged behind the ball 48 and the washer 54. The first supply port 93 may be arranged, for example, inside the coil spring 49 in the radial direction.

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 horizontal direction. The first flow path 93R may be inclined forward or backward toward the outer side in the radial direction. In this case, the oil is discharged from the first flow path 93R more gradually. Similarly, the second flow path 92R may be inclined forward or backward toward the outer side in the radial direction.

Each of FIG. 46 and FIG. 47 is a cross-sectional view showing a hammer 47 according to the embodiment. FIG. 46 corresponds to a cross-sectional view taken along the line BB of the hammer 47 shown in FIG. 45. FIG. 47 corresponds to a cross-sectional view taken along the line CC of the hammer 47 shown in FIG. 45.

As shown in FIGS. 45, 46, and 47, the hammer 47 has a hammer groove 51 in which at least a part of the balls 48 is arranged, and a hammer protrusion 59 projecting forward from the front surface of the hammer 47. The hammer 47 has a tubular shape. The hammer 47 has a hole 57 in which at least a part of the rod portion 45 is arranged.

The hammer groove 51 is provided on the inner surface of the hammer 47. The hammer groove 51 includes a third portion 51A that is inclined forward on one side in the circumferential direction and a fourth portion 51B that is inclined forward on the other side in the circumferential direction. Two third portions 51A are provided. Two fourth portions 51B are provided. The third portion 51A and the fourth portion 51B are alternately arranged in the circumferential direction.

FIG. 48 is a developed view schematically showing the outer surface of the rod portion 45 according to the embodiment. As shown in FIG. 48, the spindle groove 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 to the other side in the circumferential direction toward the rear.

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

In the axial direction, the first supply port 93 is provided between the front end portion 95 and the rear end portion 96. That is, the first supply port 93 is arranged behind the front end portion 95 and in front of the rear end portion 96. The first supply port 93 is provided on the outer surface of the rod portion 45 between the front end portion 95 and the rear end portion 96 in the axial direction.

In the axial direction, the second supply port 92 is provided on the outer surface of the rod portion 45 behind 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 unit for supplying lubricating oil to the balls 48.

The first supply port 93 supplies lubricating oil between the outer surface of the rod portion 45 and the inner surface of the hammer 47. The lubricating oil supplied from the first supply port 93 between the outer surface of the rod portion 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 a development view schematically showing each of the outer surface of the rod portion 45 and the inner surface of the hammer 47.

As described above, the spindle 8 and the hammer 47 can move relative to each other 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 can move in the axial direction while being guided by the ball 48.

For example, in the screw tightening operation, when the driving of the motor 6 is started, the rotation of the spindle 8 is started. When the load acting on the anvil 10 is low, the spindle 8 rotates with the hammer projection 59 and the anvil projection 60 in contact with each other. That is, when the load acting on the anvil 10 is low, the hammer 47 is arranged at the front end of the movable range of the hammer 47 as shown in [State A] of FIG. 49. In the [state A], the spindle 8 and the hammer 47 rotate together with the hammer protrusion 59 and the anvil protrusion 60 in contact with each other.

When the spindle 8 rotates, the lubricating oil in the internal space 94 flows through the first flow path 93R toward the outside in the radial direction due to centrifugal force. The lubricating oil flowing through the first flow path 93R is supplied from the first supply port 93 between the outer surface of the rod portion 45 and the inner surface of the hammer 47.

In the screw tightening operation, when the load acting on the anvil 10 becomes high, the rotation of the anvil 10 and the hammer 47 is stopped. Even if the rotation of the hammer 47 is stopped, the rotation of the spindle 8 is continued by the power generated by the motor 6. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the ball 48 moves backward while being guided by the spindle groove 50. When the ball 48 moves rearward, the hammer 47 moves rearward from the front end of the movable range of the hammer 47 together with the ball 48, as shown in [State B] of FIG. 49. Further, when the rotation of the spindle 8 is further continued, the hammer 47 moves rearward together with the ball 48 toward the rear end of the movable range of the hammer 47, as shown in [State C] of FIG. 49. .. The hammer 47 that has moved backward moves forward while rotating due to the elastic force of the coil spring 49. The hammer 47 hits the anvil 10 in the rotational direction. In this way, 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. As the hammer 47 rotates and moves in the front-rear direction, at least a part of the lubricating oil adhering to the inner surface of the hammer 47 comes into contact with the surface of the ball 48. As a result, 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, due to the relative movement of the spindle 8 and the hammer 47, a state in which the first supply port 93 and the hammer groove 51 face each other occurs, for example, as shown in [State B] of FIG. 49. 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 on the hammer groove 51. Further, due to the relative movement of the spindle 8 and the hammer 47, a state in which the first supply port 93 and the ball 48 face each other occurs. In a state where the first supply port 93 and the ball 48 face each other, the first supply port 93 can directly supply the lubricating oil to the surface of the ball 48.

Further, when the spindle 8 rotates, the lubricating oil in the internal space 94 flows through the second flow path 92R toward the outer side in the radial direction due to centrifugal force. The lubricating oil flowing through the second flow path 92R is supplied from the second supply port 92 between the outer surface of the rod portion 45 and the inner surface of the hammer 47. The second supply port 92 supplies lubricating oil between the outer surface of the rod portion 45 and the inner surface of the hammer 47 behind the rear end portion 96 of the spindle groove 50.

[effect]
As described above, according to the embodiment, the first supply port 93 for supplying the lubricating oil to the balls 48 is provided. By supplying lubricating oil to the surface of the ball 48, malfunction of the hammer 47 is suppressed when the hammer 47 moves in the axial direction. The spindle 8 and the hammer 47 can move smoothly relative to each other.

The first supply port 93 is provided on 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 ball 48 is arranged in the spindle groove 50. In the axial direction, the first supply port 93 is provided between the front end portion 95 of the spindle groove 50 and the rear end portion 96 of the spindle groove 50. As a result, the lubricating oil from the first supply port 93 is 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, it may be difficult for the lubricating oil to smoothly flow out from the first supply port 93, or the lubricating oil may accumulate inside the spindle groove 50. It may occur. By providing the first supply port 93 on the outer surface of the rod portion 45 outside the spindle groove 50, 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 portion 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. As a result, an appropriate amount of lubricating oil is uniformly supplied to the surface of the balls 48.

The spindle 8 has an internal space 94 in which lubricating oil is housed. The first supply port 93 is arranged radially outside the internal space 94. The first supply port 93 is connected to the internal space 94 via the first flow path 93R. As a result, when the spindle 8 rotates, the lubricating oil in the internal space 94 flows outward in the radial direction through the first flow path 93R due to centrifugal force, and flows from the first supply port 93 to the outer surface of the rod portion 45 and the hammer 47. It is supplied between the inner surface of the.

The spindle 8 has a second supply port 92 provided on the outer surface of the rod portion 45 behind the rear end portion 96 of the spindle groove 50 in the axial direction. By supplying the lubricating oil not only from the first supply port 93 but also from the second supply port 92, the spindle 8 and the hammer 47 can smoothly move relative to each other. Further, the second supply port 92 is connected to the internal space 94 via the second flow path 92R. That is, both the first supply port 93 and the second supply port 92 are connected to the internal space 94. As a result, the complexity of the structure of the spindle 8 is suppressed. Further, when the spindle 8 rotates, lubricating oil is supplied from the second supply port 92 between the outer surface of the rod portion 45 and the inner surface of the hammer 47 by centrifugal force.

[Other Embodiments]
FIG. 50 is a side view showing the deformation suppressing member 85 according to the embodiment. In the above-described 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. Further, the deformation suppressing member 85 may be straight or curved.

FIG. 51 is a cross-sectional view showing the deformation suppressing member 85 according to the embodiment. In the above-described embodiment, the deformation suppressing member 85 is arranged in the internal space of the controller accommodating portion 23. As shown in FIG. 51, the deformation suppressing member 85 may be embedded inside the housing 2 at the boundary portion 2C. Further, the deformation suppressing member 85 may be arranged in the internal space of the grip portion 22.

FIG. 52 is a cross-sectional view showing the deformation suppressing member 85 according to the embodiment. In the above-described embodiment, the deformation suppressing member 85 is fixed to the operation panel 16. As shown in FIG. 52, the deformation suppressing 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 protruding upward from the bottom plate 62A of the controller case 62. The upper end of the rod 85R supports the controller housing portion 23 of the housing 2 from the inside. An opening 13M in which the rod 85R is arranged may be provided in a part of the controller 13. The deformation suppressing member 85 shown in FIG. 52 can also suppress the deformation of the housing 2 and protect the controller 13.

In the above-described embodiment, the cushion 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, the first state may be a low-speed blinking state, and the second state may be a high-speed blinking state.

In the above-described embodiment, the number of registration modes stored in the registration mode storage unit 75 is one. The registration mode stored in the registration mode storage unit 75 may be two types or three types. The number of registration modes registered in the registration mode storage unit 75 may be less than the number of operation modes stored in the operation mode storage unit 74, and may be any plurality of registration modes.

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

In the above-described embodiment, the supply unit for supplying the lubricating oil to the ball 48 is the first supply port 93 provided on the spindle 8. The supply unit for supplying the lubricating oil to the ball 48 may be provided on the inner surface of the hammer 47.

In the above-described embodiment, the power tool 1 is an impact driver. The power tool 1 is not limited to the impact driver. Examples of the power tool 1 include a screwdriver drill, an angle drill, a hammer, a hammer drill, a grinder, a circular saw, and a reciprocating saw.

In the above-described embodiment, the electric work machine is an electric tool. The electric work machine is not limited to the electric tool. A gardening tool is exemplified as an electric work machine. Examples of gardening tools include chainsaws, hedge trimmers, lawn mowers, mowers, and blowers.

1 ... Electric tool, 2 ... Housing, 2C ... Boundary, 2L ... Left housing, 2R ... Right housing, 2S ... Screw, 3 ... Rear case, 3S ... Screw, 4 ... Hammer case, 5 ... Battery mounting part, 5A ... Terminal Block, 5B ... Tool side terminal, 6 ... Motor, 7 ... Reduction mechanism, 8 ... Spindle, 9 ... Strike mechanism, 10 ... Anvil, 10B ... Body, 11 ... Chuck sleeve, 12 ... Fan, 13 ... Controller, 13M ... Opening , 14 ... Trigger switch, 14A ... Trigger member, 14B ... Switch circuit, 15 ... Forward / reverse changeover lever, 16 ... Operation panel, 17 ... Mode changeover switch, 18 ... Light, 19 ... Intake port, 20A ... Second exhaust port, 20A1 ... Exhaust port, 20A2 ... Exhaust port, 20A3 ... Exhaust port, 20A4 ... Exhaust port, 20B ... First exhaust port, 20B1 ... Exhaust port, 20B2 ... Exhaust port, 20B3 ... Exhaust port, 21 ... Motor housing, 21A ... Cylindrical part, 22 ... Grip part, 23 ... Controller housing part, 23A ... Horizontal case holding part, 23B ... Horizontal block holding part, 23C ... Panel holding part, 23D ... Front case holding part, 23E ... Front block holding part, 23F ... rear block holding part, 23G ... contact part, 24 ... bearing retainer, 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 ... Permanent magnet for sensor, 36 ... Resin sleeve, 37 ... Sensor substrate, 38 ... Coil terminal, 39 ... Front bearing, 40 ... Rear bearing, 41 ... Pinion gear , 42 ... Planetary gear, 42P ... Pin, 43 ... Internal gear, 44 ... Flange, 45 ... Rod, 46 ... Rear bearing, 47 ... Hammer, 47B ... Body, 48 ... Ball, 49 ... Coil spring, 50 ... Spindle Groove, 50A ... 1st part, 50B ... 2nd part, 51 ... Hammer groove, 51A ... 3rd part, 51B ... 4th part, 52 ... Convex part, 53 ... Concave part, 54 ... Washer, 55 ... Insert hole, 56 ... front bearing, 57 ... hole, 58 ... hole, 59 ... hammer protrusion, 60 ... anvil protrusion, 61 ... bush, 62 ... controller case, 62A ... bottom plate, 62B ... wall plate, 62Bb ... rear wall plate, 62Bf ... Front wall plate, 62Bl ... Left wall plate, 62Br ... Right wall plate, 63 ... Opening, 64 ... Impact force switch, 65 ... Dedicated switch, 66 ... Operation device, 67 ... Notification device, 68 ... Impact detection device, 69 ... Memory Device, 70 ... Control device, 71 ... Light emitter, 72 ... operation light emitter, 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 mode storage unit , 75 ... Registration mode storage unit, 76 ... Command output unit, 77 ... Motor control unit, 78 ... Notification control unit, 79 ... First symbol, 79A ... Symbol, 79B ... Symbol, 79C ... Symbol, 79D ... Symbol, 80 ... 2nd symbol, 80A ... symbol, 80B ... symbol, 80C ... symbol, 80D ... symbol, 81 ... 3rd symbol, 81A ... symbol, 81B ... symbol, 81C ... symbol, 82 ... area, 83 ... area, 84 ... area, 85 ... Deformation suppressing member, 85R ... Rod, 86 ... Cushion layer, 87 ... Connection part, 88 ... Main plate part, 89 ... Cylinder part, 90 ... Baffle part, 90A ... Front side, 90B ... Back side, 91 ... Blade part, 91A ... Inner part, 91B ... Outer 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 Part, AX ... Rotation axis.

Claims (8)

With the motor
A spindle that is rotated by the power generated by the motor,
A hammer placed around the spindle and
A ball placed between the spindle and the hammer,
Anvil that is hit in the direction of rotation by the hammer,
A supply unit for supplying lubricating oil to the ball is provided.
Electric work machine. The supply unit includes a first supply port provided on the spindle.
The electric working machine according to claim 1. The spindle has a spindle groove in which at least a portion of the ball is located.
The spindle groove has a front end portion on one side in the axial direction and a rear end portion on the other side in the axial direction.
In the axial direction, the first supply port is provided between the front end portion and the rear end portion.
The electric working machine according to claim 2. With the motor
A spindle that is rotated by the power generated by the motor,
A hammer placed around the spindle and
A ball placed between the spindle and the hammer,
With an anvil that is hit in the direction of rotation by the hammer,
The spindle
A spindle groove in which at least a part of the ball is arranged and
It has a first supply port for supplying lubricating oil, and
The spindle groove has a front end portion on one side in the axial direction and a rear end portion on the other side in the axial direction.
In the axial direction, the first supply port is provided between the front end portion and the rear end portion.
Electric work machine. The first supply port is provided on the outer surface of the spindle outside the spindle groove.
The electric working machine according to claim 3 or 4. The lubricating oil is supplied from the first supply port between the outer surface of the spindle and the inner surface of the hammer.
The hammer moves to the other side in the axial direction by rotating the spindle while the rotation of the anvil is stopped.
By moving the hammer, the lubricating oil is supplied to the balls.
The electric working machine according to claim 5. The spindle has an internal space in which the lubricating oil is housed.
The first supply port is arranged radially outside the internal space.
The first supply port is connected to the internal space via the first flow path.
The electric working machine according to any one of claims 2 to 6. The spindle
The internal space in which the lubricating oil is stored and
It has a second supply port provided on the outer surface on the other side in the axial direction from the rear end portion in the axial direction.
The first supply port is connected to the internal space via the first flow path, and is connected to the internal space.
The second supply port is connected to the internal space via a second flow path.
The electric working machine according to claim 5.

Images