JP7334093B2 - electric work machine - Google Patents

Description

The present disclosure relates to an electric working machine.

2. Description of the Related Art In the technical field related to electric working machines, an impact driver as disclosed in Patent Document 1 is known.

JP 2019-072811 A

The impact driver has a spindle, a hammer arranged around the spindle, and a ball arranged between the spindle and the hammer. The lack of smooth relative movement between the spindle and the hammer can degrade the performance of the impact driver.

An object of the present disclosure is to provide smooth relative movement between the spindle and the hammer.

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

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 the power tool according to the embodiment. FIG. 2 is a side view showing the power tool according to the embodiment. FIG. 3 is a rear view of 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 portion of the power tool according to the embodiment. FIG. 6 is an enlarged cross-sectional view of the upper portion of the power tool according to the embodiment. FIG. 7 is a perspective view showing a spindle, striking mechanism, and anvil according to an embodiment; FIG. 8 is an exploded front perspective view of the spindle, striking mechanism, and anvil according to the embodiment. FIG. 9 is an exploded rear perspective view of the spindle, striking mechanism, and anvil according to the embodiment. FIG. 10 is a block diagram showing a power tool including a controller according to the embodiment. FIG. 11 is a schematic diagram 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 impact force mode according to the embodiment. FIG. 15 is a diagram for explaining the number of revolutions of the motor when the hammer strikes the anvil in the rotational direction in the striking force mode according to the embodiment. FIG. 16 is a diagram for explaining the wood mode control characteristics 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 bolt mode control characteristics in a bolt tightening operation according to the embodiment. FIG. 19 is a diagram for explaining bolt mode control characteristics in a bolt removing operation according to the embodiment. FIG. 20 is a transition diagram showing the state of the notification device in setting the impact force mode according to the embodiment. FIG. 21 is a transition diagram showing the state of the notification device when the dedicated mode is set according to the embodiment. FIG. 22 is a transition diagram showing the states of the notification device in the fastest mode registration process and memory mode setting according to the embodiment. FIG. 23 is a transition diagram showing states of the notification device in strong mode registration processing and memory mode setting according to the embodiment. FIG. 24 is a transition diagram showing the state of the notification device in the middle mode registration process and memory mode setting according to the embodiment. FIG. 25 is a transition diagram showing the state of the notification device in the weak mode registration process and the setting of the memory mode according to the embodiment. FIG. 26 is a transition diagram showing the states 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 the state of the notification device in text (light) mode registration processing and memory mode setting according to the embodiment. FIG. 28 is a transition diagram showing the state of the notification device in text (thick) mode registration processing and memory mode setting according to the embodiment. FIG. 29 is a transition diagram showing the state of the notification device in the bolt 1 mode registration process and memory mode setting according to the embodiment. FIG. 30 is a transition diagram showing the state of the notification device in the bolt 2 mode registration process and memory mode setting according to the embodiment. FIG. 31 is a transition diagram showing the state of the notification device in the bolt 3 mode registration process and memory mode setting according to the embodiment. FIG. 32 is an enlarged cross-sectional view of the lower portion of the power tool according to the embodiment. FIG. 33 is an enlarged cross-sectional view of the lower portion 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 an operation panel and deformation suppressing members according to the embodiment; FIG. 36 is a side view showing an operation panel and deformation suppressing members according to the embodiment; FIG. 37 is a schematic diagram showing a state in which an external force acts on the power tool according to the comparative example. FIG. 38 is a schematic diagram showing a state in which an external force acts on 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 front perspective view of the fan according to the embodiment. FIG. 41 is a rear perspective view of the fan according to the embodiment. FIG. 42 is a cross-sectional view showing the fan according to the embodiment; FIG. 43 is a cross-sectional view showing part of the fan and motor according to the embodiment. 44 is a perspective view showing a spindle according to an embodiment; FIG. FIG. 45 is a perspective view showing a spindle, balls, and 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 development 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 the embodiment; 51 is a cross-sectional view showing a deformation suppressing member according to the embodiment; FIG. FIG. 52 is a diagram schematically showing a 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 constituent elements of the embodiments described below can be combined as appropriate. Also, some components may not be used.

In the embodiments, the terms left, right, front, rear, top, and bottom are used to describe the positional relationship of each part. These terms indicate relative positions or directions with respect to the center of the electric working machine. In an embodiment, the electric working machine is a power tool 1 having a motor 6 .

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

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

[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 sectional view of the upper portion of the power tool 1 according to the embodiment. FIG. 6 is an enlarged cross-sectional view of the upper portion of the power tool according to the embodiment. FIG. 5 is a longitudinal sectional view of the upper portion of the power tool 1. FIG. FIG. 6 is a cross-sectional view of the upper portion of the power tool 1. FIG.

In embodiments, 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, an impact mechanism 9, an anvil 10, and a chuck sleeve 11. , a fan 12 , a controller 13 , a trigger switch 14 , a normal/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 embodiments, 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 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 housing portion 21 is cylindrical. The motor housing portion 21 houses at least part of the motor 6 .

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

The controller housing portion 23 is connected to the lower end portion of the grip portion 22 . The controller housing portion 23 houses the controller 13 . The outer dimensions of the controller 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 . Rear case 3 accommodates at least part of 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 with two screws 3S.

The motor housing portion 21 has an intake port 19 . Further, the motor housing portion 21 has a first exhaust port 20B. The first exhaust port 20B is formed in the cylindrical portion 21A at the rear portion of the motor housing portion 21. As shown in FIG. The rear case 3 has a second exhaust port 20A. Air in the outer space of the housing 2 flows into the inner space of the housing 2 via the intake port 19 . The air in the internal space of the housing 2 passes through the second exhaust port 20A after passing through the first exhaust port 20B. Air in the internal space of the housing 2 flows out to the external space of the housing 2 via the first exhaust port 20B and the second exhaust port 20A.

The hammer case 4 is made of metal. In embodiments, the hammer case 4 is made of aluminum. The hammer case 4 is arranged in front of the motor housing portion 21 . The hammer case 4 is tubular. 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 front opening of the motor accommodating portion 21 . A rear portion of the hammer case 4 is fitted inside the motor accommodating portion 21 . The motor housing portion 21 and the hammer case 4 are connected via a bearing retainer 24 . At least part of the bearing retainer 24 is arranged inside the hammer case 4 .

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

The battery mounting portion 5 is formed below the controller housing portion 23 . The battery mounting portion 5 is connected to the battery pack 25 . The battery pack 25 is attached to the battery attachment portion 5 . The battery pack 25 is attachable to and detachable from the battery mounting portion 5 . Battery pack 25 includes a secondary battery. In embodiments, the battery pack 25 includes rechargeable lithium-ion batteries. By being attached to the battery attachment portion 5 , the battery pack 25 can supply electric power to the power tool 1 . The motor 6 is driven based on power supplied from the battery pack 25 . The controller 13 and operation panel 16 operate based on power supplied from the battery pack 25 .

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

The stator 26 includes a stator core 28, a front insulator 29 provided at the front portion of the stator core 28, a rear insulator 30 provided at the rear portion of the stator core 28, and a plurality of insulators attached to the stator core 28 via the front insulator 29 and the rear insulator 30. and a coil 31 of

Stator core 28 includes a plurality of laminated steel plates. A steel plate is a metal plate whose main component is iron. The stator core 28 is cylindrical. Stator core 28 has a plurality of teeth that support coils 31 . Each of the front insulator 29 and the rear insulator 30 is an electrical insulating member made of synthetic resin. The front insulator 29 is arranged so as to partially cover the surface of the tooth. The rear insulator 30 is arranged so as to partially cover the surfaces of the teeth. The coil 31 is arranged around the teeth via the front insulator 29 and the rear insulator 30 . Coil 31 and stator core 28 are electrically insulated by front insulator 29 and rear insulator 30 .

The rotor 27 rotates around the rotation axis AX. The rotor 27 has a rotor shaft 32 , a rotor core 33 arranged around the rotor shaft 32 , permanent magnets 34 arranged around the rotor core 33 , and sensor permanent magnets 35 . The rotor shaft 32 extends axially. The rotor core 33 is cylindrical. Rotor core 33 includes a plurality of laminated steel plates. The permanent magnet 34 is cylindrical. The permanent magnets 34 include a first permanent magnet with a first polarity and a second permanent magnet with a second polarity. A cylindrical permanent magnet 34 is 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 part of the resin sleeve 36 is arranged inside the sensor permanent magnet 35 . The resin sleeve 36 is cylindrical. A resin sleeve 36 is attached to the front portion of the rotor shaft 32 .

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

The rotor shaft 32 is rotatably supported by each of the front bearing 39 and the rear bearing 40 . A front bearing 39 is retained in the bearing retainer 24 . The rear bearing 40 is held by the rear case 3 . The front bearing 39 supports the front portion of the rotor shaft 32 . Rear bearing 40 supports the rear portion of rotor shaft 32 . A front end portion of the rotor shaft 32 is arranged in the internal space of the hammer case 4 through an 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 speed reduction mechanism 7 via a pinion gear 41 .

The 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 reduction mechanism 7 transmits the power generated by the motor 6 to the spindle 8 . The reduction mechanism 7 rotates the spindle 8 at a rotational speed lower than that of the rotor shaft 32 . The speed 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 planetary gears 42 meshes with the pinion gear 41 . Planetary gear 42 is rotatably supported by spindle 8 via 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 driving the motor 6 , the pinion gear 41 rotates and the planetary gear 42 revolves around the pinion gear 41 . The planetary gear 42 revolves while meshing with the inner 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 42</b>P rotates at a rotational speed lower than that of the rotor shaft 32 .

A spindle 8 is arranged in front of the motor 6 . At least 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 . Planetary gear 42 is rotatably supported by flange portion 44 via pin 42P. The rotation axis of the spindle 8 and the rotation axis AX of the motor 6 coincide. The spindle 8 rotates around the rotation axis AX. The spindle 8 is rotatably supported by the rear bearing 46 . Rear bearing 46 is retained in bearing retainer 24 . A 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. Lubricants include grease. Each of the first supply port 93 and the second supply port 92 is provided in the rod portion 45 . The spindle 8 has an interior space 94 in which lubricating oil is contained. 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 centrifugal force of the spindle 8 causes the lubricating oil to be supplied to at least part of the periphery of the spindle 8 from the first supply port 93 and the second supply port 92 respectively.

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 respectively by the spindle 8 and the hammer 47. . The hammer 47 is arranged forward of the speed reduction mechanism 7 .

FIG. 7 is a perspective view showing the spindle 8, striking mechanism 9, and anvil 10 according to the embodiment. FIG. 8 is an exploded perspective view of the spindle 8, striking mechanism 9, and anvil 10 according to the embodiment, viewed from the front. FIG. 9 is an exploded perspective view of the spindle 8, striking mechanism 9, and anvil 10 according to the embodiment as seen from the rear. 7, illustration of the ball 48 and the coil spring 49 is omitted.

As shown in FIGS. 4, 5, 6, 7, 8 and 9, the hammer 47 is tubular. A hammer 47 is arranged around the rod portion 45 . Hammer 47 has a hole 57 in which rod portion 45 is arranged. Hammer 47 is rotatable together with spindle 8 . The rotation axis of the hammer 47, the rotation axis of the spindle 8, and the rotation axis AX of the motor 6 are aligned. The hammer 47 rotates around the rotation axis AX.

Ball 48 is made of metal such as steel. Ball 48 is arranged between rod portion 45 and hammer 47 . The spindle 8 has a spindle groove 50 in which at least part of the balls 48 are arranged. The spindle groove 50 is provided on part of the outer surface of the rod portion 45 . Hammer 47 has a hammer groove 51 in which at least part of ball 48 is arranged. A hammer groove 51 is provided in a portion of the inner surface of the hammer 47 . Ball 48 is positioned between spindle groove 50 and hammer groove 51 . The ball 48 can roll inside the spindle groove 50 and inside the hammer groove 51 respectively. Hammer 47 is movable with ball 48 . The spindle 8 and the hammer 47 can move relative to each other in the axial direction and the rotational direction within a movable range defined by the spindle groove 50 and the hammer groove 51 .

The coil spring 49 generates an elastic force that moves the hammer 47 forward. A 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 protrudes forward from the periphery of 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 . A rear end portion of the coil spring 49 is arranged inside the convex portion 52 and supported by the flange portion 44 . A front end portion of the coil spring 49 is arranged inside the recess 53 and supported by the washer 54 .

Anvil 10 is arranged in front of hammer 47 . The anvil 10 has an insertion hole 55 into which a tip tool is inserted. An insertion hole 55 is provided at the front end of the anvil 10 . The tip tool is attached to the anvil 10. - 特許庁The anvil 10 also has a hole 58 in which the front end of the rod portion 45 is arranged. A hole 58 is provided at the rearward end of the anvil 10 . The front end of rod portion 45 is positioned in hole 58 .

Anvil 10 is rotatable together with hammer 47 . The rotation axis of the anvil 10, the rotation axis of the hammer 47, the rotation axis of the spindle 8, and the rotation axis AX of the motor 6 coincide. The anvil 10 rotates around the rotation axis AX. The anvil is rotatably supported by a pair of front bearings 56 . A pair of front bearings 56 are held by 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 protrudes forward from the front portion of the body 47B.

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

The hammer protrusion 59 and the anvil protrusion 60 are contactable. The anvil 10 rotates together with the hammer 47 and the spindle 8 by driving the motor 6 while the hammer projection 59 and the anvil projection 60 are in contact with each other.

The anvil 10 is struck by a hammer 47 in the rotational direction. For example, when the load acting on the anvil 10 increases during a screw tightening operation, a situation may occur in which the anvil 10 cannot be rotated only by the power generated by the motor 6 . When the power generated by the motor 6 alone cannot rotate the anvil 10, the anvil 10 and the hammer 47 stop rotating. The spindle 8 and the hammer 47 are relatively movable in the axial and circumferential directions via the balls 48 . Even if the rotation of the hammer 47 stops, 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 balls 48 move backward while being guided by the spindle groove 50 and the hammer groove 51, respectively. The hammer 47 receives force from the ball 48 and moves backward along with the ball 48 . That is, the hammer 47 is moved rearward by the rotation of the spindle 8 while the rotation of the anvil 10 is stopped. By moving the hammer 47 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 backward moves forward due to the elastic force of the coil spring 49 . Hammer 47 receives a rotational force from ball 48 as it moves forward. That is, the hammer 47 moves forward while rotating. As the hammer 47 rotates and moves forward, the hammer projection 59 contacts the anvil projection 60 while rotating. As a result, the anvil protrusion 60 is struck in the rotational direction by the hammer protrusion 59 . Both the power of the motor 6 and the inertial force of the hammer 47 act on the anvil 10 . Therefore, the anvil 10 can rotate around the rotation axis AX with high torque.

A chuck sleeve 11 is arranged around the front 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 . Fan 12 generates airflow for cooling motor 6 . Fan 12 is fixed to at least part of rotor 27 . Fan 12 is fixed to the rear portion of rotor shaft 32 via bush 61 . Fan 12 is positioned between rear bearing 40 and stator 26 . The fan 12 rotates as the rotor 27 rotates. Rotation of the rotor shaft 32 causes the fan 12 to rotate together with the rotor shaft 32 . As the fan 12 rotates, 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 that has flowed into the internal space of the housing 2 cools the motor 6 by circulating through the internal space of the housing 2 . The air that has flowed through the internal space of the housing 2 flows out to the external space of the housing 2 via the first exhaust port 20B and the second exhaust port 20A.

As shown in FIG. 4 , the controller 13 is housed in the controller housing portion 23 . The controller 13 outputs control signals for controlling the motor 6 . Controller 13 includes a board on which a plurality of electronic components are mounted. Electronic components mounted on the substrate include processors such as CPU (Central Processing Unit), non-volatile memory such as ROM (Read Only Memory) or storage, volatile memory such as RAM (Random Access Memory), transistors, and resistance are exemplified.

The power tool 1 includes a controller case 62 that houses at least part of the controller 13 . The controller case 62 is arranged in the internal space of the controller housing portion 23 . At least 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 power tool 1 . A 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. As shown in FIG. A trigger switch 14 is operated by an operator to start the motor 6 . 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 protrudes forward from the upper front portion of the grip portion 22 . The trigger member 14A is operated by an operator. By operating the trigger member 14A, the motor 6 is switched between driving and stopping.

As shown in FIG. 1 , the forward/reverse switching lever 15 is provided above 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 housing portion 23 . The operation panel 16 is operated by an operator to switch control modes of the motor 6 . The operation panel 16 has a plate shape. The controller housing 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 housing portion 23 in front of the grip portion 22 . At least part of the operation panel 16 is arranged in the opening 63 .

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

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

The lights 18 are arranged on the left and right sides of the motor housing 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).

[Power tool operation]
Next, operation of the power tool 1 will be described. For example, when a screw tightening operation is performed on an object to be processed, a tip tool used for the screw tightening operation is inserted into the 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 grips the grip portion 22 and operates the trigger switch 14. - 特許庁When the trigger switch 14 is operated, power is supplied from the battery pack 25 to the motor 6 and the motor 6 is activated. Activation of the motor 6 causes the rotor shaft 32 to rotate. 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 inner teeth of the internal gear 43 . Planetary gear 42 is rotatably supported by spindle 8 via pin 42P. The revolution of the planetary gear 42 causes the spindle 8 to rotate at a rotational speed lower than that of the rotor shaft 32 .

As spindle 8 rotates while hammer projection 59 and anvil projection 60 are in contact, anvil 10 rotates with hammer 47 and spindle 8 . As the anvil 10 rotates, the screw tightening work progresses.

When a load exceeding a predetermined value acts on the anvil 10 as the screw tightening operation progresses, the anvil 10 and the hammer 47 stop rotating. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the hammer 47 moves backward. By moving the hammer 47 rearward, the contact between the hammer protrusion 59 and the anvil protrusion 60 is released. The hammer 47 that has moved backward moves forward while rotating due to the elastic force of the coil spring 49 . As the hammer 47 rotates and moves forward, the anvil 10 is hit in the rotational direction by the hammer 47 . As a result, the anvil 10 rotates around the rotation axis AX with high torque. Therefore, the screw is tightened to the workpiece with a high torque.

[controller]
FIG. 10 is a block diagram showing the power tool 1 including the 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 an impact detection device 68 .

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

The controller 13 has a storage device 69 and a control device 70 . The storage device 69 includes non-volatile memory such as ROM (Read Only Memory) or storage. Note that 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 by being operated by an operator. The operating device 66 includes multiple switches. A control mode for the motor 6 is set based on the operation signal output from the operation device 66 . The control mode of the motor 6 is switched by operating the operating device 66 . In the embodiment, the operation device 66 includes an impact force switch 64 provided on the operation panel 16, a dedicated switch 65 provided on the operation panel 16, and a mode switch 17 provided above the trigger member 14A. including.

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 operating the operating device 66 . A plurality of light emitters 71 are provided. Light emitters 71 include a plurality of operational light emitters 72 and identification light emitters 73 . Four operating light emitters 72 are provided. Working light emitters 72 include a first working light emitter 72A, a second working light emitter 72B, a third working light emitter 72C, and a fourth working light emitter 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 .

Note that 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 vibration acting on the power tool 1 .

Storage device 69 stores a plurality of control modes for motor 6 . In embodiments, the control mode includes a plurality of operating modes and a registration mode selected from the plurality of operating 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 registration modes.

The control device 70 outputs control signals for controlling the motor 6 . The control device 70 outputs a control signal for controlling the notification device 67 . The control device 70 has a command output section 76 , a motor control section 77 and a notification control section 78 .

FIG. 11 is a schematic diagram 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 operating modes include a plurality of first operating modes and a plurality of second operating modes.

The first operation mode is an impact force mode that indicates a widely used operation mode. The second operation mode is a dedicated mode indicating an operation mode that is dedicated based on the object to be processed. In the following description, the first operation mode will be referred to as an impact force mode, and the second operation mode will be referred to as an exclusive mode.

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

The operation mode storage unit 74 stores 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. ). The registration mode storage unit 75 stores registration modes.

There are ten 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 ten types of operation modes as a registration mode. In the embodiment, one type of registration mode is 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 notification device 67 is five. The number of control modes stored in the storage device 69 is eleven. The notification device 67 has fewer light emitters 71 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 operating device 66 . The motor 6 is driven based on the set control mode.

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

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

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

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

When the operation device 66 is operated for the second time 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. be. The registration mode storage unit 75 stores the selected operation mode as a registration mode.

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

The first operation includes operating one switch among the plurality of switches of the operating device 66 . The second operation includes simultaneously operating at least two of the plurality of switches of operating device 66 .

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

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

By operating only the mode changeover switch 17, 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 registration mode storage unit 75 is selected. Motor 6 is set to memory mode.

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

By simultaneously operating the impact force switch 64 and the mode changeover switch 17, the command output unit 76 outputs a registration command for registering the impact force mode. When the registration command is output, one type of striking power mode is selected from the four types of striking power modes stored in the operation mode storage section 74 . One type of striking power mode selected is registered in the registration mode storage unit 75 .

By simultaneously operating dedicated switch 65 and mode changeover switch 17, command output unit 76 outputs a registration command for registering the dedicated mode. When the registration command is output, one dedicated mode is selected from six dedicated modes stored in the operation mode storage unit 74 . One type of dedicated mode selected is registered in the registration mode storage unit 75 .

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

The notification control section 78 outputs a control signal for controlling the notification device 67 based on the mode command output from the command output section 76 . The notification control section 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 multiple light emitters 71 based on the mode command.

The notification control portion 78 outputs a control signal for controlling the notification device 67 based on the registration command output from the command output portion 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 operation patterns of the light emitters 71 whose number 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 implementation status of the registration process is notified.

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

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

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

A plurality of operating light emitters 72 are provided. Working light emitters 72 include a first working light emitter 72A, a second working light emitter 72B, a third working light emitter 72C, and a fourth working light emitter 72D. The four working light emitters 72 are spaced apart in the left-right direction.

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

The operation panel 16 is provided at least partly around the plurality of operation light emitters 72, and is provided at least partly around the plurality of operation light emitters 72 and a first symbol 79 indicating each of the plurality of striking power modes. and a second symbol 80 indicating each of a plurality of dedicated modes. The operation panel 16 also includes a third symbol 81 that is provided at least partially around the plurality of operation light emitters 72 and indicates each of the plurality of dedicated modes.

A first symbol 79 is provided to identify a plurality of striking power 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 symbols 79 include a symbol 79A indicating weak mode, a symbol 79B indicating medium mode, a symbol 79C indicating strong mode, and a symbol 79D indicating fastest mode. In an embodiment, symbol 79A is the number "1". Symbol 79B is the number "2". Symbol 79C is the number "3". The symbol 79D is the number "4".

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

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

A second symbol 80 is provided to identify multiple 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 symbols 80 are a symbol 80A indicating wood mode, a symbol 80B indicating tex (thin) mode, a symbol 80C indicating tex (thick) mode, and bolt modes (bolt 1 mode, bolt 2 mode, bolt 3 mode). ) and symbol 80D. In the embodiment, the symbol 80A is the letters "wood". The symbol 80B is the character "Tex". The symbol 80C is the "thickness" of the character. The symbol 80D is the character "bolt".

Note that the second symbol 80 may not be a character. The second symbol 80 may be an illustration, for example.

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

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

A third symbol 81 is provided to identify a plurality of bolt modes (bolt 1 mode, bolt 2 mode, bolt 3 mode), which are one type 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 symbols 81 include a symbol 81A indicating the Volt 1 mode, a symbol 81B indicating the Volt 2 mode, and a symbol 81C indicating the Volt 3 mode. In an embodiment, the symbol 81A is the number "1". The symbol 81B is the numeral "2". The symbol 81C is the number "3".

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

A third symbol 81 is provided in an area 84 that is part of the area 83 . Region 84 is colored with a third color different from the first and second colors. The third color is blue, for example.

A portion of the first color region 82 is arranged around the percussion force switch 64 . A portion of the second color region 83 is arranged around the dedicated switch 65 . Since the striking force switch 64 is located in the first color region 82, the operator can visually associate the striking force switch 64 with the first symbol 79 for identifying the plurality of striking force modes. can. Because the dedicated switch 65 is located in the second colored area 83, the operator can visually associate the dedicated switch 65 with the second symbol 80 for identifying multiple dedicated modes.

FIG. 13 is a schematic diagram showing a control mode switching method according to the embodiment. 11 types of control modes are switched by operating the operating device 66 for the first time.

When making the transition from the dedicated mode to the impact force mode, the operator briefly presses the impact force switch 64 as indicated by arrow R1 in FIG. Also, when making a transition from the memory mode to the impact force mode, the operator briefly presses the impact force switch 64 as indicated by an arrow R2 in FIG. After transitioning to the impact force mode, each time the impact force switch 64 is pressed for a short time, the control mode changes from the fastest mode, the strong mode, the medium mode, the weak mode, the fastest mode, . . . , in order.

When switching from the memory mode to the dedicated mode, the operator briefly presses the dedicated switch 65 as indicated by arrow R4 in FIG. Also, when making a transition from the impact force mode to the dedicated mode, the operator briefly presses the dedicated switch 65 as indicated by an arrow R5 in FIG. After transitioning to the dedicated mode, each time the dedicated switch 65 is pressed for a short time, the control mode changes to wood mode, text (thin) mode, text (thick) mode, bolt 1 mode, as indicated by arrow R6 in FIG. , bolt 2 mode, bolt 3 mode, wood mode, . . .

When changing from the impact force mode to the memory mode, the operator briefly presses the mode changeover switch 17 as indicated by an arrow R7 in FIG. Also, when switching from the dedicated mode to the memory mode, the operator briefly presses the mode changeover switch 17 as indicated by an arrow R8 in FIG.

In addition, when transitioning to the impact force mode after transitioning from the impact force mode to the memory mode, the operator briefly presses the mode changeover switch 17 as indicated by the arrow R9 in FIG. 13 to switch to the impact force mode. can be transitioned.

In addition, when switching to the dedicated mode after transitioning from the dedicated mode to the memory mode, the operator presses the mode changeover switch 17 for a short time as indicated by the arrow R10 in FIG. 13 to switch to the dedicated mode. can be done.

By performing the second operation of the operation device 66, the registration processing of the specific operation mode is performed.

For example, when registering one type of striking force mode from four kinds of striking force modes (fastest mode, strong mode, medium mode, weak mode), the operator has set the striking force mode that he/she desires to register. 13, the striking force switch 64 and the mode changeover switch 17 are simultaneously pressed long. 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 impact 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, text (thin) mode, text (thick) mode, bolt 1 mode, bolt 2 mode, bolt 3 mode), the operator is set, the dedicated switch 65 and the mode changeover switch 17 are pressed and held at the same time as indicated by an arrow R12 in FIG. 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 exclusive switch 65 and the mode changeover switch 17 at the same time. As a result, the wood mode is registered as the registration mode.

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

[Control characteristics]
FIG. 14 is a diagram for explaining the control characteristics of the impact force mode according to the embodiment. In FIG. 14, the horizontal axis indicates the amount of operation of the trigger member 14A, and the vertical axis indicates the duty ratio of the control signal for driving the motor 6. In FIG.

As shown in FIG. 14, in the impact force mode, the duty ratio of the control signal for driving the motor 6 is changed based on the amount of operation of the trigger member 14A. There is a one-to-one correspondence between the duty ratio of the control signal and the rotation speed of the motor 6 . The rotation speed of the motor 6 is changed by changing the duty ratio of the control signal. That is, the rotation speed of the motor 6 is changed based on the 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 steps from "1" to "10". As the amount of operation of the trigger member 14A increases, the duty ratio of the control signal increases.

Also, in the impact force mode, an upper limit value Ma of the duty ratio of the control signal is set. That is, in the impact 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 second highest after the fastest mode, the upper limit value Ma3 of the medium mode is the second highest after the strong mode, and the upper limit value Ma4 of the weak mode is the lowest.

At "10" where the operation amount is the largest, the motor 6 rotates at the rotational speed of the upper limit value Ma. When the operation amount is "1", which 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, strong mode, medium mode, and weak mode.

In the striking force mode, the hammer 47 strikes the anvil 10 in the rotational direction when the load acting on the anvil 10 due to the screw tightening operation increases.

FIG. 15 is a diagram for explaining the number of revolutions of the motor 6 when the hammer 47 strikes the anvil 10 in the rotational direction in the impact force mode according to the embodiment. In FIG. 15 , the horizontal axis indicates the time from the start of the screw tightening work, and the vertical axis indicates the number of rotations of the motor 6 .

As shown in FIG. 15, when the load acting on the motor 6 due to the screw tightening operation increases, the rotational speed of the motor 6 decreases at time ta. At time tb after time 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 wood mode control characteristics according to the embodiment. In FIG. 16 , the horizontal axis indicates the time from the start of the screw tightening work, and the vertical axis indicates the number of rotations of the motor 6 .

As shown in FIG. 16, when the operation of the trigger member 14A is started and the amount of operation of the trigger member 14A increases, the duty ratio of the control signal increases. 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 starting screw tightening work on wood, it is necessary to rotate the screw slowly so that the screw bites into the wood. That is, immediately after the start of driving the motor 6, the rotation speed of the motor 6 needs to be reduced. The screw rotates slowly because the duty ratio of the control signal in the wood mode is less than that in the fastest mode.

When the load acting on the motor 6 increases, the rotation speed of the motor 6 decreases at time ta. At time tb after time 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 that the number of impacts by the hammer 47 has exceeded a specified value based on the detection signal from the impact detection device 68, it increases the duty ratio of the control signal at time tc after time tb. That is, when the number of hits by the hammer 47 exceeds a specified value, the motor control section 77 determines that the screw has bitten into the wood, and increases the rotation speed of the motor 6 . After the screw bites into the wood, the number of revolutions of the motor 6 is increased so that the screw tightening operation to the wood can be efficiently performed in a short time.

The tex mode is an operation mode for tightening the tex screw on the workpiece. Text (thickness) mode is selected when the thickness of the object to be processed is thick. Tex (thin) mode is selected when the thickness of the object to be processed is thin. The operator can arbitrarily select a text (thick) mode or a text (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 indicates the time from the start of the screw tightening work, and the vertical axis indicates the rotation speed of the motor 6. In FIG.

As shown in FIG. 17, when the operation of the trigger member 14A is started and the amount of operation of the trigger member 14A increases, the duty ratio of the control signal increases. When the load acting on the motor 6 increases, the rotation speed of the motor 6 decreases at time ta. At time tb after time 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 that the number of impacts by the hammer 47 has exceeded a specified value based on the detection signal of the impact detection device 68, the duty ratio of the control signal is reduced at time tc after time tb.

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

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

When the bolt tightening work is performed, the motor 6 is rotated in the normal direction. When the bolt removal operation is performed, the motor 6 is rotated in the reverse direction.

FIG. 18 is a diagram for explaining bolt mode control characteristics in a bolt tightening operation according to the embodiment. In FIG. 18, the horizontal axis indicates the amount of operation of the trigger member 14A , and the vertical axis indicates the duty ratio of the control signal for driving the motor 6. In FIG .

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 bolt 3 mode has the highest upper limit Ma5, the bolt 2 mode has the second highest upper limit Ma6, and the bolt 1 mode has the lowest upper limit Ma7.

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 become "10". That is, in the bolt mode, even if the amount of operation of the trigger member 14A is small, the rotation speed of the motor 6 is set to reach the upper limit value Ma.

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

The motor control unit 77 stops driving the motor 6 when determining that the hammer 47 has started striking based on the detection signal from the striking detection device 68 .

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

In the bolt removing work, a large load acts on the motor 6 immediately after the motor 6 starts to be driven. Therefore, at time td immediately after the motor 6 starts to be driven, the hammer 47 starts striking.

When the bolt is loosened by being hit by the hammer 47, the load acting on the motor 6 is reduced. When the load acting on the motor 6 is reduced, the impact by the hammer 47 is terminated. The number of rotations of the motor 6 increases from the time te when the impact by the hammer 47 ends. The motor control unit 77 stops driving the motor 6 or reduces the number of revolutions of the motor 6 when the impact by the hammer 47 is stopped for a predetermined time Tf from the time te when the impact by the hammer 47 ends. Stopping the driving of the motor 6 or reducing the rotational speed of the motor 6 prevents the bolt from dropping from the tool bit.

[Notification device]
Next, the operation of the notification device 67 will be described. The notification control unit 78 changes the operation pattern of the plurality of operating 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.

A plurality of light emitters 71 are associated with set control modes. The specific light emitter 71 corresponding to the control mode refers to the light emitter 71 that mainly operates to notify the set control mode. The operator can recognize the set control mode by confirming the state of the specific light emitter 71 corresponding to the control mode.

In the power mode, the particular operating light emitter 72 corresponding to the fastest mode is the fourth operating light emitter 72D. The particular operating emitter 72 corresponding to the intense mode is the third operating emitter 72C. The particular operating light emitter 72 corresponding to the medium mode is the second operating light emitter 72B. The particular operating emitter 72 corresponding to the weak mode is the first operating emitter 72A.

In the dedicated mode, the specific operating light emitter 72 corresponding to the wood mode is the first operating light emitter 72A. The particular operating emitter 72 corresponding to the tex (thin) mode is the second operating emitter 72B. The particular operating emitter 72 corresponding to the tex (thick) mode is the third operating emitter 72C. The specific operating light emitters 72 corresponding to the Volt 1 mode are the first operating light emitter 72A and the fourth operating light emitter 72D. The specific operating light emitters 72 corresponding to the Volt 2 mode are the second operating light emitter 72B and the fourth operating light emitter 72D. The specific operating light emitters 72 corresponding to the Volt 3 mode are the third operating light emitter 72C and the fourth operating 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. FIG. 20 is a transition diagram showing the state of the notification device 67 in setting the striking force mode according to the embodiment. FIG. 21 is a transition diagram showing the state of the notification device 67 when the dedicated mode is set according to the embodiment.

In the impact force mode, a mode command is output from the command output unit 76 each time the impact force switch 64 is pressed for a short time, as indicated by arrow R3 in FIG. The impact force mode is switched in the order of fastest mode, strong mode, medium mode, weak mode, fastest mode, .

In the dedicated mode, a mode command is output from the command output unit 76 each time the dedicated switch 65 is pressed for a short time, as indicated by arrow R6 in FIG. The dedicated modes are switched in 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 impact 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, strong mode, medium mode, and weak mode. In an embodiment, the fifth state includes an off state. The notification control unit 78 controls the identification light emitter 73 to turn off when each of the fastest mode, strong mode, medium mode, and weak mode is set.

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

The notification control unit 78 changes the operation pattern of the plurality of operating light emitters 72 based on the set striking force mode (fastest mode, strong mode, medium mode, and weak mode). Thereby, 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 section 78 controls the fourth operating light emitter 72D corresponding to the fastest mode to be in the third state. In embodiments, the third state includes a continuous lighting state. When the fastest mode is set, the notification control section 78 continuously lights the fourth operating light emitter 72D.

Further, when the fastest mode is set, the notification control unit 78 causes not only the fourth operating light emitter 72D but also the first operating light emitting device 72A, the second operating light emitting device 72B, and the third operating light emitting device 72C. It controls so that it will be in the 3rd state (continuous lighting state).

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

When the strong mode is set, the notification control unit 78 sets not only the third operating light emitter 72C but also the first operating light emitting device 72A and the second operating light emitting device 72B to the third state (continuous lighting state). controlled to be In addition, when the strong mode is set, the notification control unit 78 controls the fourth operating light emitter 72D to be turned off.

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

Further, when the middle mode is set, the notification control unit 78 controls not only the second operating light emitter 72B but also the first operating light emitter 72A to enter the third state (continuous lighting state). In addition, when the middle mode is specified, the notification control unit 78 controls the third operating light emitter 72C and the fourth operating light emitter 72D so that they are turned off.

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

Further, when the weak mode is set, the notification control section 78 controls the second operating light emitter 72B, the third operating light emitting device 72C, and the fourth operating light emitting device 72D to be turned off.

As shown in FIG. 21, the notification control unit 78 controls the identification light emitter 73 to be in the sixth state, which is different from the fifth state, when the dedicated mode is set by the mode command. That is, the notification control unit 78 controls the identification light emitter 73 to be in 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 embodiments, the sixth state includes a continuous lighting state. The notification control unit 78 causes the identification light emitter 73 to continuously light up when each of the wood mode, tex (thin) mode, tex (thick) mode, bolt 1 mode, bolt 2 mode, and bolt 3 mode is set. control so that

The identification light emitter 73 operates to distinguish between the impact force mode and the dedicated mode. The continuous lighting of the identification light emitter 73 allows the operator to recognize that the exclusive mode is set.

The notification control unit 78 controls the operation of the plurality of operating light emitters 72 based on the set dedicated mode (wood mode, tex (thin) mode, tex (thick) mode, bolt 1 mode, bolt 2 mode, bolt 3 mode). Change the operating pattern. Thereby, 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 operating light emitter 72A corresponding to the wood mode to be in the third state (continuous lighting state).

Further, when the wood mode is set, the notification control unit 78 controls the second operating light emitter 72B, the third operating light emitting device 72C, and the fourth operating light emitting device 72D to be turned off.

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

Further, when the tex (light) mode is set, the notification control unit 78 controls so that the first operating light emitter 72A, the third operating light emitting device 72C, and the fourth operating light emitting device 72D are turned off. do.

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

Further, when the texture (thickness) mode is set, the notification control unit 78 controls so that the first operating light emitter 72A, the second operating light emitting device 72B, and the fourth operating light emitting device 72D are turned off. do.

When the volt 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 volt 1 mode into the third state (continuous lighting state). to control.

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

When the bolt 2 mode is set by the mode command, the notification control unit 78 puts 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.

In addition, when the bolt 2 mode is set, the notification control unit 78 performs control so that the first operating light emitter 72A and the third operating light emitter 72C are turned off.

When the bolt 3 mode is set by the mode command, the notification control unit 78 puts 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, when the Volt 3 mode is set, the notification control unit 78 performs control so that the first operation light emitter 72A and the second operation light emitter 72B are turned off.

As shown in FIG. 21, in the dedicated mode, the fourth operational light emitter 72D functions as a second identification light emitter that operates to identify multiple 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), wood mode, tex (thin) mode, and tex (thick) mode are selected. , the bolt modes (bolt 1 mode, bolt 2 mode, and bolt 3 mode) are identified.

In the dedicated mode, the identification light emitter 73 is in the sixth state (continuously lit state) and the fourth operation light emitter 72D is in the fifth state (extinguished state), so that the operator can see that the set dedicated mode is It can be recognized that it is not in bolt mode (bolt 1 mode, bolt 2 mode, bolt 3 mode). When the identification light emitter 73 is in the continuously lit state and the fourth operation light emitter 72D is in the off state, 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, tex (thin) mode, and 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 emitting device 72D is in the sixth state (continuous lighting state), so that the operator can enter the set dedicated mode. is the bolt mode (bolt 1 mode, bolt 2 mode, bolt 3 mode). When each of the identification light emitter 73 and the fourth operation light emitter 72D is in the continuous lighting state, 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 (continuous state). 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 addition, 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 the continuously lit state, and the sixth state may be the extinguished 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. FIG. 22 is a transition diagram showing the state of the notification device 67 in the fastest mode registration processing and memory mode setting according to the embodiment. FIG. 23 is a transition diagram showing the state of the notification device 67 in the strong mode registration process and the setting of the memory mode according to the embodiment. FIG. 24 is a transition diagram showing the state of the notification device 67 in the middle mode registration process and memory mode setting according to the embodiment. FIG. 25 is a transition diagram showing the state of the notification device 67 in the weak mode registration process and memory mode setting according to the embodiment. FIG. 26 is a transition diagram showing the 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 the state of the notification device 67 in the text (light) mode registration process and memory mode setting according to the embodiment. FIG. 28 is a transition diagram showing the state of the notification device 67 in the text (thick) mode registration process and memory mode setting according to the embodiment. FIG. 29 is a transition diagram showing the state of the notification device 67 in the bolt 1 mode registration process and memory mode setting according to the embodiment. FIG. 30 is a transition diagram showing the state of the notification device 67 in the bolt 2 mode registration process and memory mode setting according to the embodiment. FIG. 31 is a transition diagram showing the state of the notification device 67 in the bolt 3 mode registration process and memory mode setting according to the embodiment.

When registering the striking force mode, as indicated by the arrow R11 in FIG. 13, while the striking force mode desired to be registered is set, the striking force switch 64 and the mode changeover switch 17 are simultaneously long-pressed. . When setting the memory mode including the striking force mode, the mode changeover switch 17 is pressed for a short time as indicated by the arrow R7 in FIG.

When registering a dedicated mode, as indicated by arrow R12 in FIG. 13, the dedicated switch 65 and the mode changeover switch 17 are pressed long at the same time while the desired dedicated mode is set. When setting the memory mode including the dedicated mode, the mode changeover switch 17 is pressed for a short time as indicated 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.

A first state involves first blinking a particular light emitter 71 corresponding to a registration mode. A second state includes a second blinking of a particular light emitter 71 corresponding to the registration mode. In an embodiment, first flashing refers to flashing of a particular light emitter 71 at a first time interval. The second flashing means that a specific light emitter 71 flashes at a second time interval longer than the first time interval. That is, the first flashing is high speed flashing. The second flashing is slow flashing.

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

As shown in FIG. 22, the fastest mode is set when performing the fastest mode registration processing. When the fastest mode is set, the notification control unit 78 sets each of the first operating light emitter 72A, the second operating light emitting device 72B, the third operating light emitting device 72C, and the fourth operating light emitting device 72D to the third state (continuous). lighting state).

After the fastest mode is set, the registration process of the fastest mode is started by pressing the striking force switch 64 and the mode changeover switch 17 for a long time at the same time. In the registration process, the notification control unit 78 controls the fourth operating light emitter 72D corresponding to the fastest mode to be in the first state (high-speed flashing state). Further, the notification control unit 78 controls the first operating light emitter 72A, the second operating light emitting device 72B, and the third operating light emitting device 72C so that they are turned off.

When a memory mode including the fastest mode is set, the notification control unit 78 controls the fourth operating light emitter 72D corresponding to the fastest mode to enter the second state (slow flashing state). Further, the notification control section 78 controls each of the first operating light emitter 72A, the second operating light emitting device 72B, and the third operating light emitting device 72C to continuously light up.

As shown in FIG. 23, when performing strong mode registration processing, the strong mode is set. When the strong mode is set, the notification control unit 78 controls the first operating light emitter 72A, the second operating light emitting device 72B, and the third operating light emitting device 72C to be in the third state (continuous lighting state). Control.

After the strong mode is set, pressing the impact force switch 64 and the mode changeover switch 17 for a long time simultaneously starts the process of registering the strong mode. In the registration process, the notification control unit 78 controls the third operating light emitter 72C corresponding to the strong mode to enter the first blinking state (high-speed blinking state). Further, the notification control section 78 controls so that the first operation light emitter 72A, the second operation light emitter 72B, and the fourth operation light emitter 72D are turned off.

When the memory mode including the strong mode is set, the notification control section 78 controls the third operating light emitter 72C corresponding to the strong mode to be in the second state (slow flashing state). Further, the notification control section 78 controls so that each of the first operating light emitter 72A and the second operating light emitter 72B is in a continuous lighting state.

As shown in FIG. 24, the middle mode is set when performing the middle mode registration process. When the middle mode is set, the notification control section 78 controls the first operating light emitter 72A and the second operating light emitter 72B so as to be in the third state (continuous lighting state).

After the medium mode is set, the registration process of the medium mode is started by pressing the impact force switch 64 and the mode changeover switch 17 for a long time at the same time. In the registration process, the notification control unit 78 controls the second operating light emitter 72B corresponding to the medium mode to be in the first state (high-speed flashing state). Further, the notification control section 78 controls so that the first operation light emitter 72A, the third operation light emitter 72C, and the fourth operation light emitter 72D are turned off.

When the memory mode including the medium mode is set, the notification control section 78 controls the second operating light emitter 72B corresponding to the medium mode to be in the second state (slow flashing state). In addition, the notification control unit 78 controls the first operation light emitter 72A to be in a continuous lighting state.

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

After the weak mode is set, pressing the impact force switch 64 and the mode changeover switch 17 for a long time simultaneously starts the weak mode registration process. In the registration process, the notification control unit 78 controls the first operating light emitter 72A corresponding to the weak mode to be in the first state (high-speed flashing state). Further, the notification control section 78 controls so that the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D are turned off.

When the memory mode including the weak mode is set, the notification control section 78 controls the first operating light emitter 72A corresponding to the weak mode to be in the second state (slow flashing state).

Thus, when the impact 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 flashing 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 flashing state) different from the first state. This allows the worker to recognize whether or not the registration process has been performed. Also, the operator can recognize whether or not the memory mode is set.

In addition, when the operation mode is set by the mode command, the notification control unit 78 controls the specific light emitter 71 corresponding to the set operation mode to be in the third state (continuous lighting state), and the mode command 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 flashing state).

For example, as described with reference to FIG. 20, when the fastest mode is set by the mode command, the fourth operating light emitter 72D corresponding to the fastest mode is controlled to be in the third state (continuous lighting state). be. As described with reference to FIG. 22, when the memory mode including the fastest mode is set by the mode command, the fourth operating light emitter 72D corresponding to the memory mode (fastest mode) is in the fourth state (slow flashing state). is controlled to be This allows the operator to 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. is set, the third operating light emitter 72C corresponding to the memory mode (strong mode) is controlled to be in the fourth state (slow flashing state). The same is true for each of the medium mode and the weak mode. The operator can identify whether the set striking force mode is the operation mode or the memory mode.

Note that the second state and the fourth state may be the same state or different states. It is sufficient that the third state and the fourth state are different.

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

As shown in FIG. 26, the wood mode is set when the wood mode registration process is performed. When the wood mode is set, the notification control unit 78 controls the first operating light emitter 72A 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 simultaneously long-pressed to start the wood mode registration process. In the registration process, the notification control unit 78 controls the first operating light emitter 72A corresponding to the wood mode to be in the first state (high-speed flashing state). In addition, the notification control unit 78 controls the identification light emitter 73 to be in the seventh state (high-speed flashing state). Further, the notification control section 78 controls so that the second operation light emitter 72B, the third operation light emitter 72C, and the fourth operation light emitter 72D are turned off.

When the memory mode including the wood mode is set, the notification control unit 78 controls the first operating light emitter 72A corresponding to the wood mode to be in the second state (slow flashing state). Further, the notification control unit 78 controls the identification light emitter 73 to be in the eighth state (continuous lighting state).

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

After the tex (light) mode is set, the exclusive switch 65 and the mode changeover switch 17 are simultaneously long-pressed to start the tex (light) mode registration process. In the registration process, the notification control unit 78 controls the second operating light emitter 72B corresponding to the tex (light) mode to be in the first state (high-speed flashing state). In addition, the notification control unit 78 controls the identification light emitter 73 to be in the seventh state (high-speed flashing state). Further, the notification control section 78 controls so that the first operation light emitter 72A, the third operation light emitter 72C, and the fourth operation light emitter 72D are turned off.

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

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

After the Tex (thick) mode is set, the dedicated switch 65 and the mode changeover switch 17 are simultaneously long-pressed to start the Tex (thick) mode registration process. In the registration process, the notification control unit 78 controls the third operating light emitter 72C corresponding to the texture (thickness) mode to be in the first state (high-speed flashing state). In addition, the notification control unit 78 controls the identification light emitter 73 to be in the seventh state (high-speed flashing state). Further, the notification control section 78 controls so that the first operation light emitter 72A, the second operation light emitter 72B, and the fourth operation light emitter 72D are turned off.

When the memory mode including the text (thick) mode is set, the notification control unit 78 controls the third operating light emitter 72C corresponding to the text (thick) mode to be in the second state (slow flashing state). do. Further, the notification control unit 78 controls the identification light emitter 73 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 Volt 1 mode is set, the notification control unit 78 controls each of the first operating light emitter 72A and the fourth operating 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 simultaneously long-pressed to start the bolt 1 mode registration process. In the registration process, the notification control unit 78 controls the first operating light emitter 72A corresponding to the bolt 1 mode to be in the first state (high-speed flashing state). The notification control unit 78 also controls the fourth operation light emitter 72D functioning as the second identification light emitter to enter the seventh state (high-speed flashing state). In addition, the notification control unit 78 controls the identification light emitter 73 to be in the seventh state (high-speed flashing state). In addition, the notification control unit 78 controls so that the second operating light emitter 72B and the third operating light emitter 72C are turned off.

When the memory mode including the Volt 1 mode is set, the notification control unit 78 controls the first operation light emitter 72A corresponding to the Volt 1 mode to be in the second state (low-speed flashing state). Further, the notification control section 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to enter the eighth state (continuous lighting state). Further, the notification control unit 78 controls the identification light emitter 73 to be in the eighth state (continuous lighting state).

As shown in FIG. 30, when the bolt 2 mode registration process is performed, the bolt 2 mode is set. When the Volt 2 mode is set, the notification control unit 78 controls the second operating light emitter 72B and the fourth operating light emitter 72D so as 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 simultaneously long-pressed to start the bolt 2 mode registration process. In the registration process, the notification control unit 78 controls the second operating light emitter 72B corresponding to the bolt 2 mode to be in the first state (first blinking state, high-speed blinking state). The notification control unit 78 also controls the fourth operation light emitter 72D functioning as the second identification light emitter to enter the seventh state (high-speed flashing state). In addition, the notification control unit 78 controls the identification light emitter 73 to be in the seventh state (high-speed flashing state). In addition, the notification control unit 78 controls so that the first operating light emitter 72A and the third operating light emitter 72C are turned off.

When the memory mode including the Volt 2 mode is set, the notification control unit 78 controls the second operating light emitter 72B corresponding to the Volt 2 mode to be in the second state (slow flashing state). Further, the notification control section 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to enter the eighth state (continuous lighting state). Further, the notification control unit 78 controls the identification light emitter 73 to be in the eighth state (continuous lighting state).

As shown in FIG. 31, when performing the bolt 3 mode registration process, the bolt 3 mode is set. When the Volt 3 mode is set, the notification control unit 78 controls each of the third operating light emitter 72C and the fourth operating 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 simultaneously long-pressed to start the bolt 3 mode registration process. In the registration process, the notification control unit 78 controls the third operating light emitter 72C corresponding to the bolt 3 mode to be in the first state (high-speed flashing state). The notification control unit 78 also controls the fourth operation light emitter 72D functioning as the second identification light emitter to enter the seventh state (high-speed flashing state). In addition, the notification control unit 78 controls the identification light emitter 73 to be in the seventh state (high-speed flashing state). In addition, the notification control unit 78 controls so that the first operating light emitter 72A and the second operating light emitter 72B are turned off.

When a memory mode including the Volt 3 mode is set, the notification control unit 78 controls the third operating light emitter 72C corresponding to the Volt 3 mode to be in the second state (slow flashing state). Further, the notification control section 78 controls the fourth operation light emitter 72D functioning as the second identification light emitter to enter the eighth state (continuous lighting state). Further, the notification control unit 78 controls the identification light emitter 73 to be in the eighth state (continuous lighting state).

In this way, when the dedicated 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 flashing 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 flashing state) different from the first state. This allows the worker to recognize whether or not the registration process has been performed. Also, the operator can recognize whether or not the memory mode is set.

In addition, when the operation mode is set by the mode command, the notification control unit 78 controls the specific light emitter 71 corresponding to the set operation mode to be in the third state (continuous lighting state), and the mode command 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 flashing state).

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

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

[Deformation suppression member]
FIG. 32 is an enlarged sectional view of the lower portion of the power tool 1 according to the embodiment. FIG. 33 is an enlarged 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 housing portion 23 houses the controller 13 and the controller case 62, respectively.

The controller case 62 has a bottom plate 62A and wall plates 62B projecting 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 of the bottom plate 62A, a rear wall plate 62Bb projecting upward from the rear end of the bottom plate 62A, and a left wall projecting upward from the left end of the bottom plate 62A. It includes a plate 62Bl and a right wall plate 62Br that protrudes upward from the right end of the bottom plate 62A.

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

The power tool 1 includes a deformation suppressing member 85 arranged at or near the boundary 2C between the grip portion 22 and the controller accommodating portion 23 . The controller housing portion 23 is connected to the lower end portion of the grip portion 22 . The boundary portion 2C includes at least one of the lower end portion of the grip portion 22 and the upper end portion of the controller accommodating portion. The deformation suppressing member 85 suppresses 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. Note that the deformation suppressing member 85 may be made of aluminum. Note that the deformation suppressing member 85 may be made of carbon.

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

The deformation suppressing member 85 is arranged above the internal space of the controller accommodating portion 23 . The deformation suppressing member 85 is connected to the inner surface of the housing 2 at the boundary portion 2C. The deformation suppressing member 85 supports the housing 2 from 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 part of the deformation suppressing member 85 is arranged above the wall plate 62B.

The dimensions of the deformation suppressing member 85 and the dimensions of the controller case 62 are substantially equal in the left-right direction. Note that the dimension of the deformation suppressing member 85 may be larger than the dimension of the controller case 62 in the left-right direction. 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 . A 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 a sectional view enlarging 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.

As shown in FIG. 34, the end of the deformation suppressing member 85 is arranged above the upper end of the wall plate 62B in the left-right direction. 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 part of the controller accommodating portion 23 of the housing 2 . At least part of the inner surface of the controller housing portion 23 protrudes toward the center of the internal space of the controller housing portion 23 . A projecting portion projecting 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 mentioned above, housing 2 is made of a synthetic resin such as nylon. The cushion layer 86 is made of synthetic resin.

Note that the cushion layer 86 may be separate from the housing 2 . The cushion layer 86 may be made of rubber, or may be made of thermoplastic elastomers (TPE).

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

The controller housing portion 23 includes a panel holding portion 23C, a front case holding portion 23D, a front block holding portion 23E, a rear block holding portion 23F, a side case holding portion 23A, a contact portion 23G, and a side block holding portion. and a portion 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 23</b>G contacts at least part of the upper surface of the deformation suppressing member 85 . The horizontal case holding portion 23A holds the left wall plate 62Bl and the right wall plate 62Br from below. The horizontal block holding portion 23B holds the left end portion and the right end portion of the terminal block 5A from below.

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

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 partially 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 of the operation panel 16 and the connecting portion 87 are manufactured by injection molding, for example. Synthetic resin is injected into the mold for injection molding in a state where the deformation suppressing member 85 is arranged inside the mold, whereby the operation panel 16 and the connecting portion 87 are integrally molded, and the connecting portion 87 It is fixed to the deformation suppressing member 85 .

Note that the operation panel 16 and the deformation suppressing member 85 may be fixed with bolts, for example, or may be connected with 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 housing 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 housing 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 partially around the opening 63 . As shown in FIG. 32, at least part of the deformation suppressing member 85 is arranged between the boundary portion 2C and the opening 63 in the front-rear direction.

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

FIG. 37 is a schematic diagram showing a state in which an external force acts on the power tool 1J according to the comparative example. A power tool 1</b>J according to the comparative example does not have a deformation suppressing member 85 . If the power tool 1J is dropped and subjected to an external force, at least a portion of the housing 2 may be deformed. A boundary portion 2C between the grip portion 22 and the controller accommodating portion 23 is bent. Therefore, when the electric power tool 1J receives an external force, there is a high possibility that the boundary portion 2C will be deformed. If the housing 2 is bent at the boundary portion 2</b>C, the inner surface of the housing 2 may come into contact with at least one of the controller 13 and peripheral components of the controller 13 . As a result, at least one of the controller 13 and peripheral components of the controller 13 may be damaged. As the peripheral parts of the controller 13, the parts housed in the controller housing portion 23 are exemplified.

FIG. 38 is a schematic diagram 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 at or near the boundary portion 2C is suppressed.

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 . A 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 span the left wall plate 62Bl and the right wall plate 62Br. In addition, in the example shown in FIG. 39, the deformation suppressing member 85 directly contacts each of the left wall plate 62Bl and the right wall plate 62Br.

The deformation suppressing member 85 is arranged so as to partially cover the upper opening of the controller case 62 . Therefore, even if the inner surface of the housing 2 deforms so as to approach the controller 13 , the inner surface of the housing 2 contacts the deformation suppressing member 85 before contacting the controller 13 . Therefore, contact of the inner surface of the housing 2 with the controller 13 is suppressed. Therefore, the controller 13 is sufficiently protected, and damage to the controller 13 is suppressed. Also, damage to peripheral parts of the controller 13 is suppressed.

[fan]
Next, the fan 12 will be explained. As shown in FIGS. 4 and 5, fan 12 is secured to at least a portion of rotor 27 . Fan 12 is fixed to rotor shaft 32 of rotor 27 . Rotation of rotor shaft 32 causes fan 12 to rotate with rotor shaft 32 . The fan 12 rotates around the rotation axis AX. The fan 12 is arranged behind the motor 6 .

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

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

The main plate portion 88 is disc-shaped. 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 cylindrical portion 89 are connected. The rotor shaft 32 is inserted into the space inside the cylindrical portion 89 .

A plurality of blade portions 91 are provided around the cylindrical portion 89 at intervals. The main plate portion 88 is connected to the rear surface of the blade portion 91 . The front surface of the blade portion 91 includes an inner portion 91A extending radially outward from the front portion of the cylindrical portion 89, and an outer portion 91B arranged radially outward from 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 cylindrical portion 89 is arranged inside the baffle portion 90 . The bush 61 is arranged inside the cylindrical portion 89 .

The baffle portion 90 is arranged forward of the main plate portion 88 . The baffle portion 90 is ring-shaped. The baffle portion 90 is plate-shaped. The center of the baffle portion 90, the center of the cylindrical portion 89, and the rotation axis AX are aligned. The baffle portion 90 is connected to the peripheral edge portion of the front surface of the blade portion 91 .

An inner diameter Da of the baffle portion 90 is larger than an 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 perpendicular 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 .

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

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

FIG. 43 is a cross-sectional view showing 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 and the position of at least part of the stator core 28 match 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 the embodiment, stator 26 has a rear insulator 30 supported by stator core 28 . Baffle portion 90 faces rear insulator 30 . The baffle portion 90 and the rear surface of the stator core 28 face each other with the rear insulator 30 interposed therebetween.

The inner diameter Da of the baffle portion 90 is equal to the inner diameter Dc of the stator core 28 . In addition, the inner diameter Da of the baffle portion 90 may be larger than the inner diameter Dc of the stator core 28 . When 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 at 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 .

Fan 12 generates airflow for cooling motor 6 . Rotation of the rotor shaft 32 causes the fan 12 to rotate together with the rotor shaft 32 . As the fan 12 rotates, 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 that has flowed into the internal space of the housing 2 circulates through the internal space of the housing 2 while contacting the motor 6 . The motor 6 is thereby cooled. At least part of the air contacting the motor 6 flows backward toward the fan 12 as indicated by the arrow Fa in FIG. 43 . Air from the motor 6 flows inside the baffle portion 90 . The fan 12 rotates such that the air that has flowed into the baffle portion 90 circulates between the plurality of blade portions 91 and then flows radially outward from between the plurality of blade portions 91 . The air flowing out radially outward from between the plurality of blade portions 91 passes through the first exhaust port 20B and then 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, the exhaust port 20B2 is arranged at the front next to the exhaust port 20B1, and the exhaust port 20B3 is arranged at the rearmost. In the front-rear direction, the exhaust port 20B1 and at least 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 furthest forward, the exhaust port 20A2 is arranged forward next to the exhaust port 20A1, the exhaust port 20A3 is arranged forward next to the exhaust port 20A2, and the exhaust port 20A4 is arranged furthest rearward. The baffle portion 90 is also arranged in front of the exhaust port 20A1. In the front-rear direction, the exhaust port 20A4 and at least a portion of the main plate portion 88 are arranged at the same position.

By providing the baffle portion 90 , it is possible to suppress the generation of air swirl in at least part of the periphery of the fan 12 . Without the baffle portion 90 , the rotation of the fan 12 is more likely to create an air swirl, for example, at the periphery of the front surface of the blade portion 91 . The creation of air vortices can reduce the flow of air through the fan 12 . In addition, if an air swirl is generated, the flow of air radially outward from the fan 12 may be obstructed. As a result, the motor 6 may not be sufficiently cooled.

The provision of the baffle portion 90 suppresses the generation of air swirl. Therefore, air can flow smoothly, and a decrease in air flow rate is suppressed. Therefore, the motor 6 is efficiently cooled.

[spindle]
Next, the spindle 8 will be explained. FIG. 44 is a perspective view showing the spindle 8 according to the embodiment. FIG. 45 is a perspective view showing the spindle 8, balls 48, and 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 portion of the balls 48 are arranged. have

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

As described with reference to Figure 5, the spindle 8 has an interior space 94 in which lubricating oil is contained. 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 radially outer opening of the first flow path 93R. The second supply port 92 includes a radially 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 passing through the central axis (rotational axis AX) of the spindle 8 and penetrating the rod portion 45 . The first supply ports 93 are provided at two locations on the outer surface of the rod portion 45 . The second flow path 92R includes a through hole passing through the central axis (rotational axis AX) of the spindle 8 and penetrating the rod portion 45 . The second supply ports 92 are provided at two locations on the outer surface of the rod portion 45 .

A ball 48 is arranged radially outside the first supply port 93 . A washer 54 is arranged radially outside the first supply port 93 . Note that the first supply port 93 may be arranged behind the ball 48 and the washer 54 . The first supply port 93 may be arranged radially inside the coil spring 49, for example.

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

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

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

A hammer groove 51 is provided on the inner surface of the hammer 47 . The hammer groove 51 includes a third portion 51A that slopes forward on one side in the circumferential direction, and a fourth portion 51B that slopes forward on the other side in the circumferential direction. Two third portions 51A are provided. Two fourth portions 51B are provided. The third portions 51A and the fourth portions 51B are arranged alternately 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 Figure 48, the spindle groove 50 includes a first portion 50A and a second portion 50B. The first portion 50A inclines to one side in the circumferential direction toward the rear. The second portion 50B is inclined rearward to the other side in the circumferential direction.

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

The first supply port 93 is provided between the front end 95 and the rear end 96 in the axial direction. That is, the first supply port 93 is arranged rearward of the front end portion 95 and forward 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.

The second supply port 92 is provided on the outer surface of the rod portion 45 behind the rear end portion 96 in the axial direction.

Lubricating oil supplied from the first supply port 93 is supplied to the surfaces of the balls 48 . The first supply port 93 functions as a supply section that supplies 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 . Lubricating oil supplied between the outer surface of the rod portion 45 and the inner surface of the hammer 47 from the first supply port 93 is supplied to the surface of the ball 48 as the hammer 47 moves.

FIG. 49 is a diagram for explaining the operation of the hammer 47 according to the embodiment. FIG. 49 includes development views schematically showing the outer surface of the rod portion 45 and the inner surface of the hammer 47, respectively.

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 is axially movable while being guided by the balls 48 .

For example, in a screw tightening operation, when the motor 6 starts to be driven, the spindle 8 starts rotating. 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. 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] in FIG. In [State A], the spindle 8 and the hammer 47 rotate together while the hammer protrusion 59 and the anvil protrusion 60 are in contact with each other.

When the spindle 8 rotates, centrifugal force causes the lubricating oil in the internal space 94 to flow radially outward through the first flow path 93R. The lubricating oil that has flowed through the first flow path 93R is supplied between the outer surface of the rod portion 45 and the inner surface of the hammer 47 from the first supply port 93 .

When the load acting on the anvil 10 increases during the screw tightening operation, the anvil 10 and the hammer 47 stop rotating. Even if the rotation of the hammer 47 stops, 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 . As 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] in FIG. Further, when the spindle 8 continues to rotate, the hammer 47 moves backward together with the ball 48 toward the rear end of the movable range of the hammer 47, as shown in [state C] in FIG. . 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. Thus, the hammer 47 moves forward and backward while rotating.

The lubricating oil supplied from the first supply port 93 adheres to the inner surface of the hammer 47 . At least 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 the hammer 47 moves in the front-rear direction while rotating. Thereby, the lubricating oil supplied from the first supply port 93 is supplied to the surface of the ball 48 via the inner surface of the hammer 47 .

Also, due to relative movement between 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, as in [state B] in FIG. 49, for example. Lubricating oil from the first supply port 93 is supplied to the inside of the hammer groove 51 while the first supply port 93 and the hammer groove 51 face each other. By supplying the lubricating oil to the inside of the hammer groove 51 , the lubricating oil is supplied to the surface of the ball 48 rolling in the hammer groove 51 . Also, the relative movement between the spindle 8 and the hammer 47 causes the first supply port 93 and the ball 48 to face each other. In a state in which the first supply port 93 and the ball 48 face each other, the first supply port 93 can directly supply lubricating oil to the surface of the ball 48 .

Further, when the spindle 8 rotates, centrifugal force causes the lubricating oil in the internal space 94 to flow radially outward through the second flow path 92R. The lubricating oil that has flowed through the second flow path 92</b>R is supplied from the second supply port 92 to 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 that supplies lubricating oil to the balls 48 is provided. By supplying lubricating oil to the surfaces of the balls 48, the 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 surfaces of the balls 48 .

At least a portion of balls 48 are disposed in spindle grooves 50 . In the axial direction, the first supply port 93 is provided between the front end 95 of the spindle groove 50 and the rear end 96 of the spindle groove 50 . Thereby, the lubricating oil from the first supply port 93 is smoothly supplied to the surfaces of the balls 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 becomes difficult for the lubricating oil to smoothly flow out from the first supply port 93 , and the phenomenon that the lubricating oil accumulates inside the spindle groove 50 may occur. may occur. Since the first supply port 93 is provided 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 .

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 part of the lubricating oil adhering to the inner surface of the hammer 47 is supplied to the surfaces of the balls 48 as the hammer 47 moves in the axial direction. As a result, an appropriate amount of lubricating oil is evenly supplied to the surfaces of the balls 48 .

The spindle 8 has an interior space 94 in which lubricating oil is contained. 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. 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. Lubricating oil is supplied not only from the first supply port 93 but also from the second supply port 92, so that the spindle 8 and the hammer 47 can smoothly move relative to each other. Also, 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 . Thereby, complication of the structure of the spindle 8 is suppressed. Further, when the spindle 8 rotates, the lubricating oil is supplied between the outer surface of the rod portion 45 and the inner surface of the hammer 47 also from the second supply port 92 due to 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 cylindrical rod member. Further, the deformation suppressing member 85 may be straight or curved.

FIG. 51 is a cross-sectional view showing a 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. Also, 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 a deformation suppressing member 85 according to the embodiment. In the embodiment described above, 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. As shown in FIG. An upper end portion of the rod 85R supports the controller accommodating portion 23 of the housing 2 from inside. A part of the controller 13 may be provided with an opening 13M in which the rod 85R is arranged. The deformation suppressing member 85 shown in FIG. 52 can also suppress deformation of the housing 2 and protect the controller 13 .

In the embodiments described above, the cushion layer 86 may be omitted.

In the above embodiment, the first state of the light emitter 71 is the first flashing state (fast flashing state), and the second state of the light emitter 71 is the second flashing state (slow flashing state). . For example, the first state may be a slow flashing state and the second state may be a fast flashing state.

In the above-described embodiment, the number of registration modes stored in the registration mode storage unit 75 is one. The number of registration modes stored in the registration mode storage unit 75 may be two or three. 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 number.

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 portion for supplying lubricating oil to the balls 48 is the first supply port 93 provided in the spindle 8 . A supply portion for supplying lubricating oil to the balls 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 an impact driver. Examples of the power tool 1 include driver drills, angle drills, hammers, hammer drills, grinders, circular saws, and reciprocating saws.

In the above-described embodiment, the electric working machine is an electric tool. Electric working machines are not limited to electric tools. A gardening tool is exemplified as an electric working machine. Examples of gardening tools include chain saws, hedge trimmers, lawn mowers, mowers, and blowers.

DESCRIPTION OF SYMBOLS 1... Electric tool, 2... Housing, 2C... Boundary part, 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 Impact 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 switching lever 16 Operation panel 17 Mode switching 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 accommodating portion 21A... Cylindrical portion 22 Grip portion 23 Controller accommodating portion 23A Horizontal case holding portion 23B Horizontal block holding portion 23C Panel holding portion 23D Front case holding portion 23E Front block holding portion 23F 23G contact portion 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 part, 45... Rod part, 46... Rear bearing, 47... Hammer, 47B... Body, 48... Ball, 49... Coil spring, 50... Spindle Groove 50A First portion 50B Second portion 51 Hammer groove 51A Third portion 51B Fourth portion 52 Convex portion 53 Concave portion 54 Washer 55 Insertion hole 56 Front bearing 57 Hole 58 Hole 59 Hammer projection 60 Anvil projection 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...Blowing force switch 65...Exclusive switch 66...Operating device 67...Notifying device 68...Blow detecting device 69...Memory Apparatus 70 Control device 71 Light emitter 72 Operating light emitter 72A First operating light emitter 72B Second operating light emitter 72C Third operating light emitter 72D Fourth operating 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... second symbol, 80A... symbol, 80B... symbol, 80C... symbol, 80D... symbol, 81... third symbol, 81A... symbol, 81B... symbol, 81C... symbol, 82... Area, 83... Area, 84... Area, 85... Deformation suppressing member, 85R... Rod, 86... Cushion layer, 87... Connecting part, 88... Main plate part, 89... Cylindrical part, 90... Baffle part, 90A... Surface , 90B... Back surface 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 AX Rotation shaft.

Claims (4)

a motor;
a spindle rotated by power generated by the motor;
a hammer positioned around the spindle;
a ball positioned between the spindle and the hammer;
an anvil struck by the hammer in a rotational direction;
A supply unit that supplies lubricating oil to the ball ,
an outer surface of the spindle is provided with a spindle groove in which at least a portion of the ball is arranged;
The spindle groove includes a first portion that slopes backward on one side in the circumferential direction and a second portion that slopes on the other side in the circumferential direction toward the rear,
The first portion and the second portion are alternately arranged in the circumferential direction,
the supply portion includes a first supply port provided on the outer surface of the spindle between the first portion and the second portion in the circumferential direction;
In the axial direction, the first supply port is provided between front ends of the first portion and the second portion and rear ends of the first portion and the second portion,
electric work machine. the lubricating oil is supplied between the outer surface of the spindle and the inner surface of the hammer from the first supply port;
The hammer moves to the other side in the axial direction by rotating the spindle while the rotation of the anvil is stopped,
movement of the hammer supplies the lubricating oil to the ball;
The electric working machine according to claim 1 . The spindle has an internal space in which the lubricating oil is accommodated,
The first supply port is arranged radially outside the internal space,
The first supply port is connected to the internal space via a first channel,
The electric working machine according to claim 1 or 2 . The spindle is
an internal space in which the lubricating oil is accommodated;
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 a first flow path,
The second supply port is connected to the internal space via a second flow path,
The electric working machine according to claim 1 .

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