Electric work machine

Abstract

To make electric power tools more compact. [Solution] The electric work machine comprises a motor, a tool holder that rotates by the rotational force generated by the motor, a first light-emitting unit having a first light-emitting element, a second light-emitting unit having a second light-emitting element, and a substrate. The first light-emitting element is arranged on the surface of the substrate, and the second light-emitting element is arranged on the back surface of the substrate.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a power working machine.

Background Art

[0002] In the technical field related to power working machines, a screwing tool as disclosed in Patent Document 1 is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There is a demand for miniaturization of power working machines.

[0005] The technology disclosed in this specification aims to miniaturize a power working machine.

Means for Solving the Problems

[0006] This specification discloses a power working machine. The power working machine may include a motor, a tool holding part that rotates by the rotational force generated by the motor, a first light emitting part having a first light emitting element, a second light emitting part having a second light emitting element, and a substrate. The first light emitting element may be disposed on the surface of the substrate, and the second light emitting element may be disposed on the back surface of the substrate.

Effects of the Invention

[0007] According to the technology disclosed in this specification, a power working machine can be miniaturized.

Brief Description of the Drawings

[0008] [Figure 1]Figure 1 is a perspective view from the upper left rear showing an electric work machine according to the first embodiment. [Figure 2] Figure 2 is a perspective view from the upper right front showing the electric work machine according to the first embodiment. [Figure 3] Figure 3 is a view from above of the electric work machine according to the first embodiment. [Figure 4] Figure 4 is a view of the electric work machine according to the first embodiment, seen from below. [Figure 5] Figure 5 is a view of the electric work machine according to the first embodiment, seen from the front. [Figure 6] Figure 6 is a view of the electric work machine according to the first embodiment, seen from the left. [Figure 7] Figure 7 is a longitudinal cross-sectional view showing an electric work machine according to the first embodiment. [Figure 8] Figure 8 is a longitudinal cross-sectional view showing the front of the electric work machine according to the first embodiment. [Figure 9] Figure 9 is a cross-sectional view showing the front of the electric work machine according to the first embodiment. [Figure 10] Figure 10 is an exploded perspective view from the upper left front showing the front of the electric work machine according to the first embodiment. [Figure 11] Figure 11 is an exploded perspective view from the upper left front showing the front of the electric work machine according to the first embodiment. [Figure 12] Figure 12 is an exploded perspective view from the upper left rear showing the illumination light-emitting unit and the notification light-emitting unit according to the first embodiment. [Figure 13] Figure 13 is an exploded perspective view from the lower right front showing the illumination light-emitting unit and the notification light-emitting unit according to the first embodiment. [Figure 14] Figure 14 is a longitudinal cross-sectional view showing the illumination light-emitting unit and the notification light-emitting unit according to the first embodiment. [Figure 15] Figure 15 is a cross-sectional view showing the illumination light-emitting unit and the notification light-emitting unit according to the first embodiment. [Figure 16] Figure 16 is a longitudinal cross-sectional view showing a light-emitting unit for illumination according to the first embodiment. [Figure 17]FIG. 17 is a cross-sectional view showing the light-emitting unit for notification according to the first embodiment. [Figure 18] FIG. 18 is an enlarged cross-sectional view of a part of the light-emitting unit for notification according to the first embodiment. [Figure 19] FIG. 19 is a view of the substrate according to the first embodiment as seen from above. [Figure 20] FIG. 20 is a view of the substrate according to the first embodiment as seen from below. [Figure 21] FIG. 21 is a view of the cylindrical lens according to the first embodiment as seen from below. [Figure 22] FIG. 22 is an exploded perspective view of the electric working machine according to the first embodiment as seen from the upper left rear. [Figure 23] FIG. 23 is an exploded perspective view of the electric working machine according to the first embodiment as seen from the upper left rear. [Figure 24] FIG. 24 is an enlarged cross-sectional view of a part of the light-emitting unit for notification according to the second embodiment. [Figure 25] FIG. 25 is a view of the substrate according to the third embodiment as seen from the left. [Figure 26] FIG. 26 is a view of the substrate according to the fourth embodiment as seen from the left. [Figure 27] FIG. 27 is a view of the substrate according to the fifth embodiment as seen from the left. [Figure 28] FIG. 28 is a view of the substrate according to the sixth embodiment as seen from the left. [Figure 29] FIG. 29 is a view of the substrate according to the seventh embodiment as seen from the left. [Figure 30] FIG. 30 is a view of the substrate according to the eighth embodiment as seen from the left. [Figure 31] FIG. 31 is a perspective view of the electric working machine according to the ninth embodiment as seen from the upper left rear. [Figure 32] FIG. 32 is a view of the electric working machine according to the ninth embodiment as seen from the left. [Figure 33] FIG. 33 is a longitudinal sectional view of the electric working machine according to the ninth embodiment. [Figure 34]Figure 34 is a longitudinal cross-sectional view showing the front of the electric work machine according to the ninth embodiment. [Modes for carrying out the invention]

[0009] In one or more embodiments, the electric work machine may include a motor, a tool holder that rotates by the rotational force generated by the motor, a first light-emitting unit having a first light-emitting element, a second light-emitting unit having a second light-emitting element, and a substrate. The first light-emitting element may be arranged on the surface of the substrate, and the second light-emitting element may be arranged on the back surface of the substrate.

[0010] In the above configuration, the first light-emitting element is placed on the surface of the substrate and the second light-emitting element is placed on the back surface of the substrate, thus making the electric work machine more compact.

[0011] In one or more embodiments, the first light-emitting unit may emit illumination light that illuminates at least a tool held in the tool-holding unit.

[0012] In the above configuration, the tool is illuminated by the light source.

[0013] In one or more embodiments, the second light-emitting unit may emit at least a notification light that indicates the working status.

[0014] In the above configuration, the operating status of the electric work machine is left unattended by an indicator light.

[0015] In one or more embodiments, the electric work machine may include a clutch unit disposed between the motor and the tool holder, and a clutch case housing the clutch unit. The circuit board may be fixed to the clutch case.

[0016] In the above configuration, the electric work equipment can be made more compact.

[0017] In one or more embodiments, the electric work machine may include a substrate holder for holding a substrate and screws for securing the substrate holder to a clutch case. The substrate may be secured to the clutch case via the substrate holder.

[0018] In the above configuration, the electric work equipment can be made more compact.

[0019] In one or more embodiments, the first light-emitting unit may have a first lens through which light from the first light-emitting element is transmitted. The first lens may be held in a substrate holder.

[0020] In the above configuration, the electric work equipment can be made more compact.

[0021] In one or more embodiments, the first light-emitting elements may be arranged in a plurality in a direction parallel to the rotation axis of the motor.

[0022] In the above configuration, unevenness in the light emitted from the first lens in the axial direction is suppressed.

[0023] In one or more embodiments, the electric work machine may include a clutch unit disposed between the motor and the tool holder, and a clutch case housing the clutch unit. The second light-emitting unit may have a second lens through which light from the second light-emitting element is transmitted. The second lens may be cylindrical and positioned to surround the clutch case.

[0024] In the above configuration, the visibility of the second light-emitting section is improved.

[0025] In one or more embodiments, the electric work machine may include screws for securing the second lens to the clutch case.

[0026] In the above configuration, the second lens is fixed.

[0027] In one or more embodiments, the electric work machine may include a substrate holder for holding the substrate. Screws may fasten the substrate holder and the second lens to the clutch case.

[0028] In the above configuration, the substrate holder and the second lens are fixed in place.

[0029] In one or more embodiments, the second light-emitting elements may be arranged in a plurality in a direction parallel to the rotation axis of the motor.

[0030] In the above configuration, unevenness in the light emitted from the second lens in the axial direction is suppressed.

[0031] The embodiments of this disclosure will be described below with reference to the drawings, but this disclosure is not limited to these embodiments. The components of the embodiments described below can be combined as appropriate. In addition, some components may not be used.

[0032] In the embodiments, the terms left, right, front, rear, top, and bottom are used to describe the positional relationships of each part. These terms indicate relative positions or directions with respect to the center of the electric work machine. The left-right direction, the front-back direction, and the up-down direction are orthogonal.

[0033] The electric work machine has a motor. In this embodiment, the direction parallel to the motor's rotation axis AX is appropriately referred to as the axial direction. The radial direction of the motor's rotation axis AX is appropriately referred to as the radial direction. The direction around the motor's rotation axis AX is appropriately referred to as the circumferential direction or rotational direction.

[0034] The position or direction on one side in the axial direction will be appropriately referred to as the "axial side," and the position or direction on the other side in the axial direction will be appropriately referred to as the "axial side." In this embodiment, the axial direction and the front-rear direction are parallel. The axial side is the front side, and the axial side is the rear side.

[0035] In the radial direction, the position close to or approaching the motor's rotation axis AX is appropriately referred to as the radially inner direction, and the position far from or away from the motor's rotation axis AX is appropriately referred to as the radially outer direction.

[0036] The position or direction on one side in the circumferential direction shall be appropriately referred to as "one side in the circumferential direction," and the position or direction on the other side in the circumferential direction shall be appropriately referred to as "the other side in the circumferential direction."

[0037] [First Embodiment] The first embodiment will be described.

[0038] <Electric work equipment> Figure 1 is a perspective view from the upper left rear showing the electric work machine 1 according to this embodiment. Figure 2 is a perspective view from the upper right front showing the electric work machine 1 according to this embodiment. Figure 3 is a view of the electric work machine 1 according to this embodiment from above. Figure 4 is a view of the electric work machine 1 according to this embodiment from below. Figure 5 is a view of the electric work machine 1 according to this embodiment from the front. Figure 6 is a view of the electric work machine 1 according to this embodiment from the left. Figure 7 is a longitudinal cross-sectional view showing the electric work machine 1 according to this embodiment. Figure 8 is a longitudinal cross-sectional view showing the front of the electric work machine 1 according to this embodiment. Figure 9 is a transverse cross-sectional view showing the front of the electric work machine 1 according to this embodiment. Figure 9 corresponds to the view taken along line AA in Figure 8.

[0039] In this embodiment, the electric work tool 1 is an angle screwdriver, which is a type of screw tightening tool.

[0040] The electric work machine 1 comprises a main body housing 2, a clutch case 5, a front housing 10, a controller 15, an external connection terminal 68, a sound output element 70, a trigger lever 19, a forward / reverse switching button 20, a motor 4, a reduction mechanism 53, a clutch unit 6, a spindle 48, an intermediate shaft 57, an output unit 11, and a detection element 67.

[0041] The main housing 2 is a cylindrical member extending in the front-to-back direction. The main housing 2 includes a left half-housing 2A and a right half-housing 2B positioned to the left of the left half-housing 2A. The left half-housing 2A and the right half-housing 2B are fixed together by a number of screws 9.

[0042] The main housing 2 has a motor housing 3, a grip section 7 located behind the motor housing 3, and a battery mounting section 8 located behind the grip section 7. The motor housing 3 houses the motor 4. The grip section 7 is held by the operator. The battery mounting section 8 holds the battery pack 13.

[0043] The clutch case 5 is a cylindrical component positioned at the front of the main housing 2. The clutch case 5 houses the clutch unit 6. The clutch case 5 is fixed to the front of the main housing 2. The clutch case 5 is fixed to the front of the main housing 2 by multiple screws 31.

[0044] The front housing 10 is a cylindrical member positioned at the front of the clutch case 5. The front housing 10 is bent downward in its middle section. The front housing 10 houses the output section 11. The front housing 10 is fixed to the front of the clutch case 5. The front housing 10 has a bent cylindrical section 55 and a screw sleeve 56 positioned around the rear of the bent cylindrical section 55. The front housing 10 is fixed to the front of the clutch case 5 by the screw sleeve 56 being connected to a screw section 54 provided at the front of the clutch case 5.

[0045] The battery pack 13 is the power source for the electric work machine 1. The battery mounting section 8 holds the terminal block 14 to which the battery pack 13 is electrically connected. The battery pack 13 is attached to and detached from the terminal block 14. The battery pack 13 is attached to the terminal block 14 by sliding it upward from below.

[0046] The controller 15 controls at least the motor 4. The controller 15 is housed in the battery mounting section 8. The controller 15 has a control circuit board 16 on which electronic components such as capacitors, a microcontroller, and switching elements are mounted, and a case 17 that houses the control circuit board 16.

[0047] The external connection terminal 68 is connected to an external device. The external connection terminal 68 is located above the terminal block 14. A Universal Serial Bus (USB) terminal is exemplified as the external connection terminal 68. A personal computer is exemplified as the external device. The personal computer can change the settings of the controller 15 via the external connection terminal 68. The external connection terminal 68 is covered by a cover 69.

[0048] The sound output element 70 outputs a notification sound. A buzzer is exemplified as the sound output element 70. The sound output element 70 is housed in the grip portion 7. The sound output element 70 is an example of a notification element. The notification element notifies at least the working status of the electric work machine 1.

[0049] The trigger lever 19 protrudes downward from the lower front part of the grip section 7. The trigger lever 19 is operated by the operator to drive the motor 4. The trigger lever 19 is connected to a trigger switch 18. The trigger switch 18 is housed in the grip section 7. When the trigger lever 19 is operated to move upward, an operation signal to drive the motor 4 is sent from the trigger switch 18 to the controller 15.

[0050] The forward / reverse rotation switch button 20 protrudes from the front of the grip section 7 in the left and right directions. The forward / reverse rotation switch button 20 is operated by the operator to switch the rotation direction of the motor 4.

[0051] Motor 4 is the power source for the electric work machine 1. Motor 4 is an inner rotor type brushless motor. Motor 4 has a stator 21 and a rotor 22 that rotates relative to the stator 21. The rotor 22 rotates around a rotation axis AX that extends in the front-rear direction.

[0052] The stator 21 includes a stator core 23, insulators 24 fixed to the front and rear of the stator core 23, a plurality of coils 25 wound around the stator core 23 via the insulators 24, and a terminal unit 32 that short-circuits the plurality of coils 25.

[0053] The rotor 22 includes a rotor shaft 26, a rotor core 27 arranged around the rotor shaft 26, a plurality of permanent magnets 28 fixed to the outer circumferential surface of the rotor core 27, and a plurality of sensor permanent magnets 29 fixed to the front end surface of the rotor core 27.

[0054] The sensor circuit board 30 is fixed to the front insulator 24. The sensor circuit board 30 supports a rotation detection element that detects the rotation of the rotor 22. The rotation detection element includes a magnetic sensor that detects the position of the sensor's permanent magnet 29. The detection signal from the rotation detection element is transmitted to the controller 15. The controller 15 controls the drive current supplied to the motor 4 based on the detection signal from the rotation detection element.

[0055] Inside the main housing 2, there is a front wall 33 that separates the motor housing 3 from the clutch case 5, and a rear rib 34 that separates the motor housing 3 from the grip section 7.

[0056] The rotor shaft 26 extends in the front-rear direction. The front of the rotor shaft 26 is rotatably supported by a bearing 36. The rear of the rotor shaft 26 is rotatably supported by a bearing 37. The bearing 36 is held in a cylindrical bearing holder 35 supported by a front wall 33. The bearing 37 is held in the center of the rear rib 34. A centrifugal fan 38 is fixed to a portion of the rotor shaft 26 between the stator 21 and the bearing 37. The centrifugal fan 38 rotates together with the rotor shaft 26. The rotation of the centrifugal fan 38 generates an airflow for cooling the motor 4. Multiple intake ports 39 are formed in a portion of the motor housing 3 radially outward of the stator 21. Multiple exhaust ports 40 are formed in a portion of the motor housing 3 radially outward of the centrifugal fan 38. As the centrifugal fan 38 rotates, air from outside the motor housing 3 flows into the motor housing 3 through the intake ports 39. Air flowing into the motor housing 3 flows toward the exhaust port 40 while in contact with the motor 4. The motor 4 is cooled by the air coming into contact with it. After passing through the motor 4, the air flows out of the motor housing 3 through the exhaust port 40.

[0057] The front end of the rotor shaft 26 is positioned in front of the bearing holder 35. The bearing holder 35 is positioned around the rotor shaft 26. A pinion gear 41 is fixed to the front end of the rotor shaft 26. The rotor shaft 26 is coupled to the reduction gear 53 via the pinion gear 41.

[0058] The reduction gear 53 transmits the rotational force generated by the motor 4 to the spindle 48. The reduction gear 53 reduces the rotational speed of the rotor shaft 26 and transmits it to the spindle 48. The reduction gear 53 connects the rotor shaft 26 and the spindle 48. The reduction gear 53 rotates the spindle 48 at a rotational speed lower than the rotational speed of the rotor shaft 26. The reduction gear 53 includes a planetary gear mechanism that is driven based on the rotational force generated by the motor 4.

[0059] The reduction gear 53 is positioned between the motor 4 and the output unit 11 in the front-rear direction. The reduction gear 53 includes an internal gear 42, two stages of planetary gears 44 positioned inside the internal gear 42, and two stages of carriers 43 supporting the planetary gears 44. The pinion gear 41 is coupled to the later planetary gear 44.

[0060] The clutch unit 6 is positioned between the motor 4 and the output unit 11 in the front-rear direction. The clutch unit 6 is positioned between the reduction mechanism 53 and the output unit 11 in the front-rear direction. The clutch unit 6 operates to change between an engaged state, which transmits the rotational force of the motor 4 transmitted via the reduction mechanism 53 to the output unit 11, and a released state, which blocks the transmission of the rotational force of the motor 4 to the output unit 11.

[0061] The clutch section 6 has a rear cam 45 that rotates together with the preceding carrier 43, and a front cam 47 that is coupled to the rear cam 45 via a cam ball 46. The rear cam 45 and the front cam 47 can rotate together in the rotational direction by the cam ball 46.

[0062] The spindle 48 is connected to the reduction mechanism 53 via the clutch 6. The spindle 48 has a cam groove 49. A ball 50 is positioned in the cam groove 49. The spindle 48 is coupled to the front cam 47 via the ball 50. The front cam 47 and the spindle 48 can rotate together in the rotational direction by the ball 50. The front cam 47 can move in the forward and backward directions relative to the spindle 48.

[0063] A spring retainer 51 is positioned around the front of the spindle 48. The spring retainer 51 is positioned in front of the front cam 47. A coil spring 52 is positioned between the spring retainer 51 and the front cam 47. The coil spring 52 biases the front cam 47 backward. Due to the biasing force of the coil spring 52, the front cam 47 is positioned in a retracted position that engages with the cam ball 46.

[0064] The output unit 11 has an intermediate shaft 57 and an output shaft 12. The intermediate shaft 57 is connected to the front of the spindle 48. A hexagonal prismatic portion is provided at the rear end of the intermediate shaft 57. A hexagonal hole is provided at the front end of the spindle 48. The hexagonal prismatic portion of the intermediate shaft 57 is fitted into the hexagonal hole of the spindle 48. The intermediate shaft 57 rotates together with the spindle 48. The rear end of the intermediate shaft 57 is housed in the clutch case 5. The front end of the intermediate shaft 57 is housed in the bent cylindrical portion 55. A bevel gear 58 is provided at the front end of the intermediate shaft 57. The intermediate shaft 57 is rotatably supported by a bearing 59.

[0065] The output shaft 12 rotates around a rotation axis that extends vertically. The output shaft 12 is rotatably supported by a bearing 60. The lower end of the output shaft 12 protrudes downward from the front housing 10. A bevel gear 61 is provided at the upper end of the output shaft 12. The bevel gear 58 of the intermediate shaft 57 and the bevel gear 61 of the output shaft 12 are coupled. When the spindle 48 rotates and the intermediate shaft 57 rotates, the output shaft 12 rotates. The output shaft 12 rotates while holding a driver bit, which is a type of tool. The output shaft 12 is an example of a tool holder that rotates due to the rotational force generated by the motor 4.

[0066] The clutch unit 6 operates to switch between an engaged state, which transmits the rotational force of the motor 4 transmitted via the reduction mechanism 53 to the output unit 11, and a disengaged state, which blocks the transmission of the rotational force of the motor 4 to the output unit 11. In the engaged state, the rotational force of the motor 4 causes the rear cam 45 to rotate together with the front carrier 43, which in turn causes the front cam 47 to rotate via the cam ball 46, and the spindle 48 to rotate via the ball 50. The rotation of the spindle 48 causes the intermediate shaft 57 to rotate, which in turn causes the output shaft 12 to rotate via the bevel gear 58 and the bevel gear 61.

[0067] During screw tightening, the motor 4 is driven when the clutch unit 6 is engaged. When the load torque transmitted from the output shaft 12 to the spindle 48 via the intermediate shaft 57 exceeds the set torque during screw tightening, the clutch unit 6 changes from the engaged state to the disengaged state. When the load torque exceeds the set torque, it means that the screw has been tightened to the object to be tightened with the target tightening force, and the screw tightening operation has been successfully performed. The set torque is determined by the rearward biasing force of the coil spring 52 on the front cam 47.

[0068] When the clutch unit 6 is disengaged, the front cam 47 moves forward via the ball 50 that rolls in the cam groove 49, disengaging from the cam ball 46 and allowing it to rotate freely relative to the rear cam 45. This interrupts the transmission of the rotational force of the motor 4 to the spindle 48, and the clutch unit 6 is disengaged.

[0069] In other words, when the load torque transmitted from the output shaft 12 to the spindle 48 is less than or equal to the set torque, the front cam 47 is positioned in the retracted position due to the rearward biasing force of the coil spring 52. When the front cam 47 is in the retracted position, the clutch unit 6 is engaged, and the rotational force of the motor 4 is transmitted to the spindle 48. When the load torque transmitted from the output shaft 12 to the spindle 48 exceeds the set torque, the front cam 47 is moved to the forward position against the biasing force of the coil spring 52. When the front cam 47 is in the forward position, the clutch unit 6 is disengaged, and the rotational force of the motor 4 is not transmitted to the spindle 48.

[0070] The detection element 67 is supported by the detection substrate 66. The detection element 67 detects the release state of the clutch unit 6. A sensor plate 62 is positioned below the clutch unit 6. The sensor plate 62 holds a magnet 65. The sensor plate 62 is movable in the front-rear direction. The sensor plate 62 is biased rearward by a coil spring 63. The sensor plate 62 has an engaging piece 64 that protrudes upward from the front of the sensor plate 62. The engaging piece 64 is positioned in front of the front cam 47. When the clutch unit 6 is released, the front cam 47 moves to the forward position while in contact with the engaging piece 64. As the front cam 47 moves to the forward position, the sensor plate 62 holding the magnet 65 moves forward together with the front cam 47.

[0071] A detection substrate 66 supporting the detection element 67 is positioned below the sensor plate 62. The detection element 67 includes a magnetic sensor capable of detecting the movement of a magnet 65 held by the sensor plate 62. A Hall IC is exemplified as the magnetic sensor. When the clutch unit 6 is activated and the sensor plate 62 moves forward, the detection element 67 detects a change in the magnetic field of the magnet 65. The detection signal from the detection element 67 is transmitted to the controller 15.

[0072] <Light-emitting unit for illumination and light-emitting unit for notification> The electric work implement 1 has an illumination light-emitting unit 71 and a notification light-emitting unit 72. The illumination light-emitting unit 71 emits illumination light that illuminates at least the driver bit held on the output shaft 12. The notification light-emitting unit 72 emits notification light that notifies at least the working status of the electric work implement 1. The working status of the electric work implement 1 includes the operating status of the clutch unit 6. The working status of the electric work implement 1 includes the screw-tightening operation status.

[0073] The illumination light-emitting unit 71 emits a single color of light. The illumination light emitted from the illumination light-emitting unit 71 is, for example, white light.

[0074] The notification light-emitting unit 72 can emit multiple colors of light. The notification light emitted from the illumination light-emitting unit 71 includes at least one of green notification light, yellow notification light, and red notification light.

[0075] The illumination light emitter 71 emits illumination light in conjunction with the trigger switch 18. The illumination light emitter 71 emits illumination light in conjunction with the motor 4. When the trigger lever 19 is operated to move upward and the trigger switch 18 is turned on, the motor 4 is driven. When the operation of the trigger lever 19 is released and the trigger switch 18 is turned off, the motor 4 stops. The illumination light emitter 71 emits illumination light when the trigger switch 18 is turned on. The illumination light emitter 71 does not emit illumination light when the trigger switch 18 is turned off. The illumination light emitter 71 emits illumination light when the motor 4 is driven. The illumination light emitter 71 does not emit illumination light when the motor 4 is stopped.

[0076] The notification light emitter 72 emits notification light in conjunction with the clutch unit 6. The notification light emitter 72 does not emit notification light when the motor 4 is driven and the screw tightening operation is being performed, and the clutch unit 6 is engaged.

[0077] The notification light emitter 72 emits, for example, a green notification light when the clutch unit 6 changes from an engaged state to a disengaged state while the motor 4 is driven and the screw tightening operation is being performed. As described above, the clutch unit 6 changes from an engaged state to a disengaged state when the front cam 47 moves from a retracted position to a forward position. When the front cam 47 moves from a retracted position to a forward position, the magnet 65 held by the front cam 47 moves forward. The detection element 67 can detect the forward movement of the magnet 65. When the controller 15 detects that the detection element 67 has detected the forward movement of the magnet 65, it determines that the screw tightening operation is in good condition and emits, for example, a green notification light from the notification light emitter 72.

[0078] The notification light emitter 72 emits, for example, a red notification light if the clutch unit 6 does not change from an engaged state to a disengaged state while the motor 4 is being driven and screw tightening work is being performed. For example, in screw tightening work, the operator may release the trigger lever 19 before the screw is tightened to the target screw tightening force. If the motor 4 stops before the detection element 67 detects the forward movement of the magnet 65, the controller 15 determines that the screw tightening work condition is poor and emits, for example, a red notification light from the notification light emitter 72.

[0079] The operating status of the electric work machine 1, as indicated by the notification light unit 72, is not limited to the operating status of the clutch unit 6 or the screw tightening status. The controller 15 may, for example, flash a red notification light on the notification light unit 72 when the remaining capacity of the battery pack 13 decreases. The controller 15 may alternately illuminate a red notification light and a green notification light on the notification light unit 72 when the voltage input to the controller 15 becomes abnormal. The controller 15 may flash a red light on the notification light unit 72 when the temperature of the controller 15 becomes abnormal.

[0080] Furthermore, the sound output element 70, which is an example of a notification element, outputs a notification sound that notifies at least the working status of the electric work machine 1. When the detection element 67 detects the forward movement of the magnet 65, the controller 15 emits, for example, a green notification light from the notification light-emitting unit 72 and outputs a first notification sound from the sound output element 70. If the motor 4 stops before the detection element 67 detects the forward movement of the magnet 65, the controller 15 emits, for example, a red notification light from the notification light-emitting unit 72 and outputs a second notification sound from the sound output element 70.

[0081] Furthermore, if the remaining capacity of the battery pack 13 decreases, the controller 15 may flash a red warning light on the warning light-emitting unit 72 and output a third warning sound from the sound output element 70. If the voltage input to the controller 15 becomes abnormal, the controller 15 may alternately light a red warning light and a green warning light on the warning light-emitting unit 72 and output a fourth warning sound from the sound output element 70. If the temperature of the controller 15 becomes abnormal, the controller 15 may flash a red light on the warning light-emitting unit 72 and output a fifth warning sound from the sound output element 70.

[0082] Figure 10 is an exploded perspective view from the upper left front showing the front of the electric work machine 1 according to this embodiment. Figure 11 is an exploded perspective view from the upper left front showing the front of the electric work machine 1 according to this embodiment. Figure 12 is an exploded perspective view from the upper left rear showing the illumination light-emitting unit 71 and the notification light-emitting unit 72 according to this embodiment. Figure 13 is an exploded perspective view from the lower right front showing the illumination light-emitting unit 71 and the notification light-emitting unit 72 according to this embodiment. Figure 14 is a longitudinal cross-sectional view showing the illumination light-emitting unit 71 and the notification light-emitting unit 72 according to this embodiment. Figure 15 is a transverse cross-sectional view showing the illumination light-emitting unit 71 and the notification light-emitting unit 72 according to this embodiment. Figure 15 corresponds to the view of the cross-sectional arrow along line BB in Figure 14. Figure 16 is a longitudinal cross-sectional view showing the illumination light-emitting unit 71 according to this embodiment. Figure 17 is a transverse cross-sectional view showing the notification light-emitting unit 72 according to this embodiment. Figure 18 is an enlarged transverse cross-sectional view of a part of the notification light-emitting unit 72 according to this embodiment.

[0083] The illumination light-emitting unit 71 has a plurality of light-emitting elements 73 (first light-emitting elements) and a transmissive lens 74 (first lens). The notification light-emitting unit 72 has a plurality of light-emitting elements 75 (second light-emitting elements), a light-diffusing lens 76 and a cylindrical lens 77 (second lens). The electric work machine 1 includes a substrate 78.

[0084] Figure 19 is a view of the substrate 78 according to this embodiment from above. Figure 20 is a view of the substrate 78 according to this embodiment from below.

[0085] The light-emitting element 73 is positioned on the front (bottom) surface of the substrate 78. The light-emitting element 75 is positioned on the back (top) surface of the substrate 78. A screw hole 781 is provided at the rear of the substrate 78.

[0086] The light-emitting element 73 is a light-emitting diode (LED). Multiple light-emitting elements 73 are arranged in the front-to-back direction on the lower surface of the substrate 78. In this embodiment, two light-emitting elements 73 are arranged in the front-to-back direction.

[0087] The light-transmitting lens 74 transmits light emitted from the light-emitting element 73. The light-transmitting lens 74 is positioned on the underside of the substrate 78. The light-transmitting lens 74 faces the light-emitting element 73. The light-transmitting lens 74 includes a bent portion 741 facing the front light-emitting element 73 and a flat portion 742 facing the rear light-emitting element 73. The bent portion 741 bends upward toward the front. Light emitted from the light-emitting element 73 and transmitted through the bent portion 741 is irradiated in front of the light-transmitting lens 74. Light transmitted through the bent portion 741 is irradiated onto the output shaft 12 or the driver bit held by the output shaft 12. Light emitted from the light-emitting element 73 and transmitted through the flat portion 742 is irradiated below the light-transmitting lens 74.

[0088] The light-emitting element 75 is a light-emitting diode (LED). Multiple light-emitting elements 75 are arranged in the front-to-back direction on the upper surface of the substrate 78. In this embodiment, three light-emitting elements 73 are arranged in the front-to-back direction.

[0089] The light-diffusing lens 76 and the cylindrical lens 77 are positioned between the motor 4 and the output shaft 12 in the front-rear direction. The light-diffusing lens 76 is positioned above the substrate 78. The cylindrical lens 77 is positioned above the light-diffusing lens 76. The light-diffusing lens 76 is positioned between the light-emitting element 75 and the cylindrical lens 77 in the up-down direction.

[0090] The light-diffusing lens 76 has an incident surface 761 facing the light-emitting element 75 and an exit surface 762 facing the cylindrical lens 77. Both the incident surface 761 and the exit surface 762 are substantially flat surfaces. The incident surface 761 and the exit surface 762 are substantially parallel. An incident groove 763 is provided on the incident surface 761. The incident groove 763 is recessed upward from the incident surface 761. An exit groove 764 is provided on the exit surface 762. The exit groove 764 is recessed downward from the exit surface 762. Both the incident groove 763 and the exit groove 764 are elongated in the front-to-back direction. In both the front-to-back and left-to-right directions, the positions of the incident groove 763 and the exit groove 764 coincide.

[0091] Each of the injection groove 763 and the injection groove 764 includes a triangular groove. In a cross-section perpendicular to the rotation axis AX, the angle α of the injection groove 763 is smaller than the angle β of the injection groove 764. For example, angle α is 90 degrees and angle β is 115 degrees. Also, the depth Da of the injection groove 763 is deeper than the depth Db of the injection groove 764. For example, depth Da is 0.5 mm and depth Db is 0.3 mm.

[0092] The cylindrical lens 77 transmits light from the light-emitting element 75. The cylindrical lens 77 is positioned to surround the clutch case 5. The cylindrical lens 77 is rotatably supported by the clutch case 5. The cylindrical lens 77 is positioned so that its central axis coincides with the rotation axis AX of the motor 4. The central axis of the cylindrical lens 77 extends in the front-rear direction.

[0093] Figure 21 is a view of the cylindrical lens 77 according to this embodiment, seen from below. The axial dimension La of the cylindrical lens 77 is smaller than the radial dimension Wa of the cylindrical lens 77.

[0094] The cylindrical lens 77 has an incident portion 771 into which light from the light-emitting element 75 enters. A recess 772 is provided in a part of the cylindrical lens 77, which is recessed radially inward from the outer circumferential surface of the cylindrical lens 77. The recess 772 is recessed upward from the lower part of the outer circumferential surface of the cylindrical lens 77. In this embodiment, the recess 772 is a through portion that penetrates the outer and inner circumferential surfaces of the cylindrical lens 77. In the following description, the recess 772 will be appropriately referred to as the through portion 772.

[0095] The through-hole 772 is a through-hole that penetrates the outer and inner surfaces of the cylindrical lens 77. The through-hole 772 is elongated in a direction parallel to the central axis of the cylindrical lens. The incident portion 771 includes the inner surface of the through-hole 772. The cylindrical lens 77 has a screw hole 773 formed in front of the through-hole 772.

[0096] The light-emitting element 75 is positioned radially outward from the cylindrical lens 77. The light-emitting element 75 irradiates the cylindrical lens 77 with light via the light-diffusing lens 76. The light emitted from the light-emitting element 75 enters the entrance groove 763 of the light-diffusing lens 76. At least a portion of the light from the light-emitting element 75 that enters the entrance groove 763 passes through the light-diffusing lens 76 and is then emitted from the exit groove 764. The light emitted from the exit groove 764 enters the entrance portion 771 of the cylindrical lens 77. At least a portion of the light that enters the entrance portion 771 propagates inside the cylindrical lens 77 and is then emitted radially outward from the outer circumferential surface of the cylindrical lens 77.

[0097] The electric work machine 1 comprises a clutch unit 6 positioned between the motor 4 and the output shaft 12 in the front-rear direction, a clutch case 5 housing the clutch unit 6, and a circuit board holder 79 holding the circuit board 78.

[0098] The substrate holder 79 holds the substrate 78. The substrate holder 79 also holds the light-transmitting lens 74. The light-transmitting lens 74 is positioned below the substrate 78. The substrate holder 79 has a screw hole 791, a screw hole 792 located behind the screw hole 791, and an opening 793 located between the screw hole 791 and the screw hole 792 in the front-to-back direction. At least a portion of the substrate 78 is positioned in the opening 793. Light emitted from the light-emitting element 73 passes through the light-transmitting lens 74 and is then emitted from the opening 793.

[0099] The front of the circuit board holder 79 is fixed to the clutch case 5 by a screw 80. The cylindrical lens 77 is fixed to the clutch case 5 by a screw 80. The screw 80 is inserted into the screw holes 791 and 773, and then into the screw hole 82 provided in the clutch case 5. The screw 80 fastens the circuit board holder 79, the cylindrical lens 77, and the clutch case 5 together.

[0100] The rear of the circuit board holder 79 is fixed to the clutch case 5 by a screw 81. The screw 81 is inserted into the screw holes 792 and 781, and then into the screw hole 83 provided in the clutch case 5. The screw 81 fastens the circuit board holder 79, the circuit board 78, and the clutch case 5 together.

[0101] The circuit board 78 is fixed to the clutch case 5. The circuit board 78 is fixed to the clutch case 5 by a circuit board holder 79 that holds the circuit board 78, which is fixed to the clutch case 5 by screws 80 and 81. The circuit board 78 is fixed to the clutch case 5 via the circuit board holder 79. The cylindrical lens 77 is fixed to the clutch case 5. The cylindrical lens 77 is fixed to the clutch case 5 by screws 80. Screws 80 fix the circuit board holder 79 and the cylindrical lens 77 to the clutch case 5.

[0102] <Operation> Next, the operation of the electric work implement 1 will be described. With the driver bit attached to the output shaft 12 pressed against the screw, the operator operates the trigger lever 19 so that it moves upward. When the trigger switch 18 is turned on by operating the trigger lever 19, a drive current is supplied from the battery pack 13 to the motor 4 via the controller 15, and the motor 4 is driven. The controller 15 supplies a drive current to each of the multiple coils 25 based on the detection signal transmitted from the rotation detection element of the sensor circuit board 30. The rotor 22 rotates as a result of the drive current supplied to the coils 25.

[0103] When the rotor shaft 26 rotates due to the rotation of the rotor 22, the rotational force of the rotor shaft 26 is transmitted to the spindle 48 via the reduction mechanism 53. When the load torque transmitted from the output shaft 12 to the spindle 48 is less than or equal to the set torque, the clutch 6 is engaged, and the rotational force of the rotor shaft 26 is transmitted to the spindle 48 via the reduction mechanism 53 and the clutch 6, causing the spindle 48 to rotate. As the spindle 48 rotates, the intermediate shaft 57 and the output shaft 12 rotate. As the output shaft 12 rotates, the driver bit rotates, and the screw tightening operation proceeds.

[0104] When the trigger switch 18 is turned on, the controller 15 causes the illumination light emitter 71 to emit illumination light. Also, the rotation of the rotor shaft 26 causes the centrifugal fan 38 to rotate together with the rotor shaft 26. The rotation of the centrifugal fan 38 causes air to flow into the motor housing 3 from the intake port 39. The air that flows into the motor housing 3 cools the motor 4 and is then discharged from the exhaust port 40.

[0105] As the screw tightening process progresses, the screw is tightened to the target object with the target tightening force, and when the load torque transmitted from the output shaft 12 to the spindle 48 exceeds the set torque, the front cam 47 moves forward and the clutch unit 6 is released. When the clutch unit 6 is released, the rotation of the output shaft 12 stops.

[0106] When the clutch unit 6 is released, the sensor plate 62 that holds the magnet 65 moves forward together with the front cam 47. The detection element 67 detects the forward movement of the magnet 65. When the detection element 67 detects the forward movement of the magnet 65, the controller 15 determines that the screw tightening operation is in good condition based on the detection signal from the detection element 67 and emits a green notification light from the notification light emitter 72. If the motor 4 stops before the detection element 67 detects the forward movement of the magnet 65, the controller 15 determines that the screw tightening operation is in poor condition and emits a red notification light from the notification light emitter 72.

[0107] Furthermore, when the detection element 67 detects the forward movement of the magnet 65, the controller 15 emits a green notification light from the notification light-emitting unit 72 and outputs a first notification sound from the sound output element 70. If the motor 4 stops before the detection element 67 detects the forward movement of the magnet 65, the controller 15 emits, for example, a red notification light from the notification light-emitting unit 72 and outputs a second notification sound from the sound output element 70.

[0108] <Adjusting the clutch> Figures 22 and 23 are exploded perspective views taken from the upper left rear, showing the electric work machine 1 according to this embodiment.

[0109] As shown in Figure 22, a part of the clutch case 5 is provided with an opening 84 into which a jig for adjusting the clutch part 6 can be inserted. The opening 84 is located at the top of the clutch case 5. The cylindrical lens 77 is rotatable around the clutch case 5 so as to change between a state that covers the opening 84 and a state that does not cover it.

[0110] As shown in Figures 1 to 8, for example, when screw tightening is performed, the cylindrical lens 77 is fixed to the clutch case 5 by screws 80 and 81 with the opening 84 covered by the cylindrical lens 77. By covering the opening 84 with the cylindrical lens 77, the intrusion of foreign matter from the outside into the clutch case 5 is suppressed.

[0111] As shown in Figure 23, when a jig for adjusting the clutch portion 6 is inserted into the opening 84, the cylindrical lens 77 is rotated to a position that does not cover the opening 84. The cylindrical lens 77 is rotated to a position that aligns the through portion 772 with the opening 84. The operator can adjust the clutch portion 6 by inserting the jig into the clutch case 5 through the opening 84.

[0112] <Effects> As described above, in this embodiment, the electric work machine 1 may include a motor 4, an output shaft 12 which is a tool holder that rotates by the rotational force generated by the motor 4, an illumination light-emitting unit 71 which is a first light-emitting unit having a first light-emitting unit 73, an alert light-emitting unit 72 which is a second light-emitting unit having a second light-emitting unit 75, and a substrate 78. The light-emitting unit 73 may be arranged on the surface of the substrate 78, and the light-emitting unit 75 may be arranged on the back surface of the substrate 78.

[0113] In the above configuration, the light-emitting element 73 is placed on the surface of the substrate 78, and the light-emitting element 75 is placed on the back surface of the substrate 78, so the electric work machine 1 can be made more compact.

[0114] In this embodiment, the illumination light-emitting unit 71 may emit illumination light that illuminates at least the tool held on the output shaft 12.

[0115] In the above configuration, the tool is illuminated by the light source.

[0116] In this embodiment, the notification light-emitting unit 72 may emit at least notification light that notifies the working status.

[0117] In the above configuration, the working status of the electric work machine 1 is left unattended by an indicator light.

[0118] In this embodiment, the electric work machine 1 may include a clutch unit 6 positioned between the motor 4 and the output shaft 12, and a clutch case 5 housing the clutch unit 6. The circuit board 78 may be fixed to the clutch case 5.

[0119] In the above configuration, the electric work implement 1 is made more compact.

[0120] In this embodiment, the electric work machine 1 may include a substrate holder 79 for holding the substrate 78, and a screw 81 for fixing the substrate holder 79 to the clutch case 5. The substrate 78 may be fixed to the clutch case 5 via the substrate holder 79.

[0121] In the above configuration, the electric work implement 1 is made more compact.

[0122] In this embodiment, the illumination light-emitting unit 71 may have a transmission lens 74, which is a first lens through which light from the light-emitting element 73 is transmitted. The transmission lens 74 may be held by a substrate holder 79.

[0123] In the above configuration, the electric work implement 1 is made more compact.

[0124] In this embodiment, multiple light-emitting elements 73 may be arranged in a direction parallel to the rotation axis AX of the motor 4.

[0125] In the above configuration, unevenness in the light emitted from the transmissive lens 74 in the axial direction is suppressed.

[0126] In this embodiment, the electric work machine 1 may include a clutch unit 6 positioned between the motor 4 and the output shaft 12, and a clutch case 5 housing the clutch unit 6. The notification light-emitting unit 72 may have a cylindrical lens 77, which is a second lens through which light from the light-emitting element 75 passes. The cylindrical lens 77 is cylindrical and may be positioned to surround the clutch case 5.

[0127] In the above configuration, the visibility of the notification light-emitting unit 72 is improved.

[0128] In this embodiment, the electric work machine 1 may be equipped with a screw 80 for fixing the cylindrical lens 77 to the clutch case 5.

[0129] In the above configuration, the cylindrical lens 77 is fixed in place.

[0130] In this embodiment, the electric work machine 1 may include a substrate holder 79 for holding the substrate 78. The screws 80 may be used to fix the substrate holder 79 and the cylindrical lens 77 to the clutch case 5.

[0131] In the above configuration, the substrate holder 79 and the cylindrical lens 77 are fixed in place.

[0132] In this embodiment, multiple light-emitting elements 75 may be arranged in a direction parallel to the rotation axis AX of the motor 4.

[0133] In the above configuration, unevenness in the light emitted from the cylindrical lens 77 in the axial direction is suppressed.

[0134] In this embodiment, the electric work machine 1 may include a motor 4, an output shaft 12 which is a tool holder that rotates due to the rotational force generated by the motor 4, a cylindrical lens 77 disposed between the motor 4 and the output shaft 12, and a light-emitting element 75 which is disposed radially outward from the cylindrical lens 77 and irradiates the cylindrical lens 77 with light.

[0135] In the above configuration, since notification light is emitted from the cylindrical lens 77, the visibility of the notification light-emitting unit 72 is improved.

[0136] In this embodiment, the cylindrical lens 77 may be positioned such that its central axis coincides with the rotation axis AX of the motor 4.

[0137] In the above configuration, the visibility of the notification light-emitting unit 72 is improved.

[0138] In this embodiment, the axial dimension of the cylindrical lens 77 may be smaller than the radial dimension of the cylindrical lens 77.

[0139] In the above configuration, the axial dimension of the electric work implement 1 is suppressed.

[0140] In the above configuration, light emitted from the light-emitting element 75 can enter the inner surface of the penetration portion 772.

[0141] In this embodiment, multiple light-emitting elements 75 may be arranged in a direction parallel to the central axis of the cylindrical lens 77.

[0142] In the above configuration, unevenness in the light emitted from the cylindrical lens 77 in the axial direction is suppressed.

[0143] In this embodiment, a through-hole 772 is provided in a part of the cylindrical lens 77, which penetrates the outer and inner surfaces of the cylindrical lens 77, and light from the light-emitting element 75 may be incident on the inner surface of the through-hole 772.

[0144] In the above configuration, light emitted from the light-emitting element 75 can enter the inner surface of the penetration portion 772.

[0145] In this embodiment, at least a portion of the light incident on the inner surface of the through-hole 772 may propagate through the inside of the cylindrical lens 77 and then be emitted radially outward from the outer surface of the cylindrical lens 77.

[0146] In the above configuration, the light emitted from the light-emitting element 75 enters the inner surface of the through-hole 772 of the cylindrical lens 77 and is then emitted from the outer surface of the cylindrical lens 77, thereby improving the visibility of the notification light-emitting unit 72.

[0147] In this embodiment, the electric work machine 1 may include a light-diffusing lens 76 positioned between the light-emitting element 75 and the cylindrical lens 77.

[0148] In the above configuration, light diffused by the light diffusion lens 76 enters the cylindrical lens 77.

[0149] In this embodiment, the light diffusion lens 76 may have an incident groove 763 provided on an incident surface 761 facing the light-emitting element 75, and an exit groove 764 provided on an exit surface 762 facing the cylindrical lens 77. At least a portion of the light incident from the light-emitting element 75 into the incident groove 763 may be ejected from the exit groove 764 and then incident on the cylindrical lens 77.

[0150] In the above configuration, light diffused by the light diffusion lens 76 enters the cylindrical lens 77.

[0151] In this embodiment, the entrance groove 763 and the exit groove 764 may each be elongated in a direction parallel to the central axis of the cylindrical lens 77.

[0152] In the above configuration, light diffused by the light diffusion lens 76 enters the cylindrical lens 77.

[0153] In this embodiment, the entrance groove 763 and the injection groove 764 may each include a triangular groove. In a cross-section perpendicular to the central axis, the angle β of the entrance groove 763 may be smaller than the angle α of the injection groove 764.

[0154] In the above configuration, light diffused by the light diffusion lens 76 enters the cylindrical lens 77.

[0155] In this embodiment, the depth Da of the injection groove 763 may be greater than the depth Db of the injection groove 764.

[0156] In the above configuration, light diffused by the light diffusion lens 76 enters the cylindrical lens 77.

[0157] In this embodiment, the electric work machine 1 may include a clutch unit 6 positioned between the motor 4 and the output shaft 12, and a clutch case 5 housing the clutch unit 6. The cylindrical lens 77 may be positioned to surround the clutch case 5.

[0158] In the above configuration, the visibility of the notification light-emitting unit 72 is improved.

[0159] In this embodiment, the cylindrical lens 77 may be rotatably supported in the clutch case 5.

[0160] In the above configuration, the cylindrical lens 77 can be rotated.

[0161] In this embodiment, a part of the clutch case 5 may be provided with an opening 84 into which a jig for adjusting the clutch portion 6 can be inserted. The cylindrical lens 77 may be rotatable so as to change between a state that covers the opening 84 and a state that does not cover it.

[0162] In the above configuration, the cylindrical lens 77 is used as a cover that covers the aperture 84.

[0163] In this embodiment, the electric work machine 1 may be equipped with screws 80 for fixing the cylindrical lens 77 to the clutch case 5 while the opening 84 is covered by the cylindrical lens 77.

[0164] In the above configuration, the cylindrical lens 77 is used as a cover that covers the aperture 84.

[0165] In this embodiment, the electric work machine 1 may include a substrate 78 that supports the light-emitting element 75 and a substrate holder 79 that holds the substrate 78. The screws 80 may be used to fix the substrate holder 79 and the cylindrical lens 77 to the clutch case 5.

[0166] In the above configuration, the circuit board holder 79 and the cylindrical lens 77 are fixed to the clutch case 5 by screws 80.

[0167] [Second Embodiment] A second embodiment will now be described. In the following description, components that are the same as or equivalent to those in the above-described embodiment will be denoted by the same reference numerals, and the descriptions of those components will be simplified or omitted.

[0168] Figure 24 is an enlarged cross-sectional view of a part of the notification light-emitting unit 72B according to this embodiment. In the above embodiment, the recess 772 provided in the cylindrical lens 77 includes a through portion. As shown in Figure 24, the recess 772B only needs to be recessed upward from the lower part of the outer peripheral surface of the cylindrical lens 77, and does not need to penetrate the outer peripheral surface and the inner peripheral surface of the cylindrical lens 77. It is sufficient that an inner surface of the recess 772 is provided into which light from the light-emitting element 75 enters.

[0169] [Third Embodiment] A third embodiment will now be described. In the following description, components that are the same as or equivalent to those in the embodiments described above will be denoted by the same reference numerals, and the descriptions of those components will be simplified or omitted.

[0170] Figure 25 is a view of the substrate 78C according to this embodiment, seen from the left. In the embodiment described above, the detection element 67 for detecting the release state of the clutch portion 6 is arranged on a detection substrate 66, which is different from the substrate 78. As shown in Figure 25, the detection element 67 may be arranged on the substrate 78C on which the light-emitting element 73 is arranged. In the example shown in Figure 25, the light-emitting element 73 is arranged on the lower surface (front surface) of the substrate 78C, and the detection element 67 is arranged on the upper surface (back surface) of the substrate 78C. The detection element 67 is arranged in the same position as at least a portion of the magnet 65, which is arranged in a retracted position in the front-rear direction. Note that, as shown in Figure 25, the light-emitting element 75 may be arranged on the upper surface of the substrate 78C. The detection element 67 is arranged behind the light-emitting element 75.

[0171] In the above embodiment, the detection target of the detection element 67 is the clutch unit 6. Specifically, the detection target of the detection element 67 is the magnet 65 that moves in synchronization with the front cam 47 of the clutch unit 6. Furthermore, the detection element 67 is a magnetic sensor such as a Hall IC capable of detecting the movement of the magnet 65. The detection element 67 may also be a photointerrupter. The photointerrupter may, for example, detect the movement of the sensor plate 62.

[0172] [Fourth Embodiment] A fourth embodiment will now be described. In the following description, components that are the same as or equivalent to those in the embodiments described above will be denoted by the same reference numerals, and the descriptions of those components will be simplified or omitted.

[0173] Figure 26 is a view of the substrate 78D according to this embodiment, seen from the left. As shown in Figure 26, the sound output element 70, which is an example of a notification element, may be placed on the substrate 78D on which the light-emitting element 73 is placed. In the example shown in Figure 26, the light-emitting element 73 is placed on the bottom surface (front surface) of the substrate 78D, and the sound output element 70 is placed on the top surface (back surface) of the substrate 78D. In the example shown in Figure 26, the light-emitting element 75 is placed on the top surface of the substrate 78D together with the sound output element 70. The light-emitting element 75 is also an example of a notification element. The light-emitting element 75 emits notification light. Note that the light-emitting element 73 may be omitted on the substrate 78D. The light-emitting element 75 may be placed on the top surface of the substrate 78D, and the sound output element 70 may be placed on the bottom surface of the substrate 78D.

[0174] [Fifth Embodiment] A fifth embodiment will now be described. In the following description, components that are the same as or equivalent to those in the embodiments described above will be denoted by the same reference numerals, and the descriptions of those components will be simplified or omitted.

[0175] Figure 27 is a view of the substrate 78E according to this embodiment, seen from the left. As shown in Figure 28, a vibration element 85, which is an example of a notification element, may be placed on the substrate 78E on which the light-emitting element 73 is arranged. The vibration element 85 generates notification vibrations. A piezoelectric element is exemplified as the vibration element 85. In the example shown in Figure 27, the light-emitting element 73 is placed on the lower surface (front surface) of the substrate 78E, and the vibration element 85 is placed on the upper surface (back surface) of the substrate 78E. In the example shown in Figure 27, the light-emitting element 75 is placed on the upper surface of the substrate 78E together with the vibration element 85. The light-emitting element 75 is also an example of a notification element. The light-emitting element 75 emits notification light. Note that the light-emitting element 73 may be omitted on the substrate 78E. The light-emitting element 75 may be placed on the upper surface of the substrate 78E, and the vibration element 85 may be placed on the lower surface of the substrate 78E.

[0176] [Sixth Embodiment] A sixth embodiment will now be described. In the following description, components that are the same as or equivalent to those in the embodiments described above will be denoted by the same reference numerals, and the descriptions of those components will be simplified or omitted.

[0177] Figure 28 is a view of the substrate 78F according to this embodiment, seen from the left. As shown in Figure 28, the external connection terminal 68 may be located on the substrate 78F on which the light-emitting element 73 is arranged. The external connection terminal 68 is connected to an external device. A Universal Serial Bus (USB) terminal is an example of the external connection terminal 68. In the example shown in Figure 28, the light-emitting element 73 is located on the bottom surface (front surface) of the substrate 78F, and the external connection terminal 68 is located on the top surface (back surface) of the substrate 78F. In the example shown in Figure 28, the light-emitting element 75 is located on the top surface of the substrate 78F together with the external connection terminal 68. Note that the light-emitting element 73 may be omitted on the substrate 78F. The light-emitting element 75 may be located on the top surface of the substrate 78F, and the external connection terminal 68 may be located on the bottom surface of the substrate 78F.

[0178] Note that the external connection terminal 68 is not limited to a USB terminal. The external connection terminal 68 may also be a communication terminal capable of wireless communication with external devices.

[0179] [Seventh Embodiment] A seventh embodiment will now be described. In the following description, components that are the same as or equivalent to those in the embodiments described above will be denoted by the same reference numerals, and the descriptions of those components will be simplified or omitted.

[0180] Figure 29 is a view of the substrate 78G according to this embodiment, seen from the left. As shown in Figure 29, the detection element 67 and the external connection terminal 68 may be arranged on a single substrate 78G. In the example shown in Figure 29, the detection element 67 is arranged on the upper surface of the substrate 78G, and the external connection terminal 68 is also arranged on the upper surface of the substrate 78G. In addition, one or both of the light-emitting elements 73 and 75 described in the above embodiment may be arranged on the substrate 78G.

[0181] [Eighth Embodiment] An eighth embodiment will now be described. In the following description, components that are the same as or equivalent to those in the embodiments described above will be denoted by the same reference numerals, and the descriptions of those components will be simplified or omitted.

[0182] Figure 30 is a view of the substrate 78H according to this embodiment, viewed from the left. As shown in Figure 30, a detection element 67, an external connection terminal 68, and a sound output element 70, which is an example of a notification element, may be arranged on a single substrate 78H. In the example shown in Figure 30, the detection element 67 is arranged on the upper surface of the substrate 78H, and the external connection terminal 68 and the sound output element 70 are also arranged on the upper surface of the substrate 78H. A vibration element 85 may be arranged on the substrate 78H instead of the sound output element 70, or together with the sound output element 70. One or both of the light-emitting elements 73 and 75 described in the above embodiment may be arranged on the substrate 78H.

[0183] [Ninth Embodiment] A ninth embodiment will now be described. In the following description, components that are the same as or equivalent to those in the embodiments described above will be denoted by the same reference numerals, and the descriptions of those components will be simplified or omitted.

[0184] Figure 31 is a perspective view from the upper left rear showing the electric work machine 1J according to this embodiment. Figure 32 is a view of the electric work machine 1J according to this embodiment from the left. Figure 33 is a longitudinal cross-sectional view showing the electric work machine 1J according to this embodiment. Figure 34 is a longitudinal cross-sectional view showing the front of the electric work machine 1J according to this embodiment.

[0185] In the above-described embodiment, the electric work tool 1 is an angle screwdriver. As shown in Figures 31 to 34, the electric work tool 1J may also be a so-called pistol-type screwdriver. In the electric work tool 1J, the rotation axis AX of the motor 4J and the rotation axis of the output shaft 12J coincide.

[0186] The electric work machine 1 comprises a main body housing 2J, a clutch case 5J, a front housing 10J, a controller 15J, a sound output element 70J, a trigger lever 19J, a forward / reverse switching button 20J, a motor 4J, a reduction gear mechanism 53J, a clutch unit 6J, a spindle 48J, an output shaft 12J, and a tool holding mechanism 86.

[0187] The main housing 2J includes a motor housing section 3J, a grip section 7J located below the motor housing section 3J, and a battery mounting section 8J located below the grip section 7J.

[0188] The clutch case 5J is a cylindrical component located in front of the motor housing 3J. The clutch case 5J houses the clutch unit 6J.

[0189] The front housing 10J is a cylindrical member positioned in front of the clutch case 5J. The front housing 10J accommodates at least a portion of the output shaft 12J.

[0190] The battery pack 13J is the power source for the electric work machine 1J. The battery mounting section 8J holds the terminal block 14J, which is electrically connected to the battery pack 13J.

[0191] The controller 15J controls at least the motor 4J. The controller 15J is housed in the battery mounting section 8J.

[0192] The trigger lever 19J protrudes forward from the upper front of the grip section 7J. The trigger lever 19J is connected to the trigger switch 18J.

[0193] The forward / reverse rotation switch button 20J protrudes from the top of the grip section 7 in the left-right direction.

[0194] Motor 4J is the power source for the electric work machine 1J. Motor 4J is an inner rotor type brushless motor.

[0195] The rotor shaft 26J extends in the longitudinal direction. The front end of the rotor shaft 26J is rotatably supported by a bearing 36J. The rear end of the rotor shaft 26J is rotatably supported by a bearing 37J. A centrifugal fan 38J is fixed to the rear end of the rotor shaft 26J. The front end of the rotor shaft 26J is coupled to a reduction gear mechanism 53J.

[0196] The clutch unit 6J operates to switch between an engaged state, which transmits the rotational force of the motor 4J transmitted via the reduction mechanism unit 53J to the output shaft 12J, and a released state, which blocks the transmission of the rotational force of the motor 4J to the output shaft 12.

[0197] The output shaft 12J rotates around a pivot axis that extends in the front-rear direction. The output shaft 12J is rotatably supported by a bearing 60J. The front end of the output shaft 12 protrudes forward from the front housing 10J. The output shaft 12J has a tool hole that extends rearward from the front end of the output shaft 12J. The tool holding mechanism 86 holds the driver bit inserted into the tool hole.

[0198] Similar to the electric work machine 1 described in the above embodiment, the electric work machine 1J has a light-emitting unit 71 for illumination and a light-emitting unit 72 for notification.

[0199] [Other embodiments] In the above embodiment, the electric work implement is a screwdriver, which is a type of power tool. The electric work implement may be at least one of the following power tools: a driver drill, an angle drill, an impact driver, a grinder, a hammer, a hammer drill, a circular saw, and a reciprocating saw. Alternatively, the electric work implement may be an outdoor power tool. Examples of outdoor power tools include a chainsaw, a hedge trimmer, a lawnmower, a brush cutter, and a blower.

[0200] In the above-described embodiment, the power source for the electric work machine does not have to be a battery pack. The power source for the electric work machine may also be commercial power (AC power). [Explanation of Symbols]

[0201] 1...Electric work implement, 1J...Electric work implement, 2...Main body housing, 2A...Left half-split housing, 2B...Right half-split housing, 2J...Main body housing, 3...Motor housing, 3J...Motor housing, 4...Motor, 4J...Motor, 5...Clutch case, 5J...Clutch case, 6...Clutch section, 6J...Clutch section, 7...Grip section, 7J...Grip section, 8...Battery mounting section, 8J...Battery mounting section, 9...Screw, 10...Front housing, 10J...Front housing, 11...Output section, 12...Output shaft, 12J...Output shaft, 13...Battery pack, 13J...Battery pack, 1 4...Terminal block, 14J...Terminal block, 15...Controller, 15J...Controller, 16...Control circuit board, 17...Case, 18...Trigger switch, 18J...Trigger switch, 19...Trigger lever, 19J...Trigger lever, 20...Forward / reverse switch button, 20J...Forward / reverse switch button, 21...Stator, 22...Rotor, 23...Stator core, 24...Insulator, 25...Coil, 26...Rotor shaft, 26J...Rotor shaft, 27...Rotor core, 28...Permanent magnet, 29...Permanent magnet for sensor, 30...Sensor circuit board, 31...Screw, 32...Terminal unit, 33...Front wall, 3 4...Rear rib, 35...Bearing holder, 36...Bearing, 36J...Bearing, 37...Bearing, 37J...Bearing, 38...Centrifugal fan, 38J...Centrifugal fan, 39...Intake port, 40...Exhaust port, 41...Pinion gear, 42...Internal gear, 43...Carrier, 44...Planetary gear, 45...Rear cam, 46...Cam ball, 47...Front cam, 48...Spindle, 48J...Spindle, 49...Cam groove, 50...Ball, 51...Spring holder, 52...Coil spring, 53...Reduction mechanism, 53J...Reduction mechanism, 54...Screw part, 55...Bent cylinder part, 56...Screw sleeve, 57...Intermediate shaft, 58...Bebe Lugear, 59...bearing, 60...bearing, 60J...bearing, 61...bevel gear, 62...sensor plate, 63...coil spring, 64...engaging piece, 65...magnet, 66...detection substrate, 67...detection element, 68...external connection terminal, 69...cover, 70...sound output element, 70J...sound output element, 71...light-emitting part for illumination (first light-emitting part), 72...light-emitting part for notification (second light-emitting part), 72B...light-emitting part for notification, 73...light-emitting element (first light-emitting element), 74...transmissive lens (first lens), 75...light-emitting element (second light-emitting element), 76...light-diffusing lens, 77...cylindrical lens (second lens), 78...substrate, 78C...substrate,78D…Substrate, 78E…Substrate, 78F…Substrate, 78G…Substrate, 78H…Substrate, 79…Substrate holder, 80…Screw, 81…Screw, 82…Screw hole, 83…Screw hole, 84…Opening, 85…Vibration element, 86…Tool holding mechanism, 741…Bent section, 742…Flat section, 761…Induction surface, 762…Injection surface, 763…Induction groove section, 764…Injection groove section, 771…Induction section, 772…Through section (recess), 772B…Recess, 773…Screw through-hole, 781…Screw through-hole, 791…Screw through-hole, 792…Screw through-hole, 793…Opening, α…Angle, β…Angle, Da…Depth, Db…Depth, La…Dimension, Wa…Dimension.

Claims

1. Motor and, The tool holding part rotates due to the rotational force generated by the motor, A light-emitting element for notification, The part to be detected and A detection element for detecting the target part, A circuit board and, The aforementioned notification light-emitting element is arranged on the substrate, The detection element is arranged on the substrate, The detection target unit includes a magnet, The detection element includes a magnetic sensor for detecting the magnet. Electric work equipment.

2. It has a lens through which light from the aforementioned notification light-emitting element passes, The electric work machine according to claim 1.

3. It is positioned in front of the motor in the front-rear direction parallel to the rotation axis of the motor and includes an output shaft for holding a driver bit, The lens is positioned between the rear end of the motor and the rear end of the output shaft in the front-rear direction. The electric work machine according to claim 2.

4. The light emitted from the aforementioned notification light-emitting element is emitted radially outward from the outer surface of the lens which faces radially outward from the rotation axis. The electric work machine according to claim 3.

5. The substrate has a first surface and a second surface, The notification light-emitting element and the magnetic sensor are arranged on the first surface. The electric work machine according to claim 1.

Images