drive drill

Abstract

The present application provides a kind of driving drill, which can smoothly change the driving condition of motor.The driving drill is provided with: motor;Output part, which is arranged at a position more forward than the motor, and rotates by the rotating force of the motor;Trigger lever, which is operated to start the motor;Forward and reverse switch lever, which is operated to switch the rotating direction of the motor;First operating part, which is operated to change the driving condition of the motor;Second operating part, which is arranged at a position more upward than the first operating part, and is operated to change the driving condition of the motor;And controller, which sets the driving condition of the motor based on the operation of at least one of the first operating part and the second operating part.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a driver drill. Background Technology

[0002] In the technical field of drive drills, drive drills as disclosed in Patent Document 1 are known.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-045844 Summary of the Invention

[0006] When changing the motor drive conditions in a drive drill, the operator expects the following: to be able to smoothly change the motor drive conditions while maintaining the same working posture when using the drive drill.

[0007] The purpose of the technology disclosed in this specification is to enable smooth changes in the driving conditions of the motor in a drive drill.

[0008] This specification discloses a drive drill. The drive drill may include: a motor; an output section disposed at a position further forward than the motor and rotated by the rotational force of the motor; a trigger lever operated to start the motor; a forward / reverse switching lever operated to switch the rotation direction of the motor; a first operating member operated to change the drive conditions of the motor; a second operating member disposed at a position higher than the first operating member and operated to change the drive conditions of the motor; and a controller that sets the drive conditions of the motor based on the operation of at least one of the first and second operating members.

[0009] Additionally, the drive drill may include: a motor; an output section positioned further forward than the motor and rotated by the motor's rotational force; a vibration section positioned between the motor and the output section, capable of switching between vibrating the output section in the forward-reverse direction and not vibrating the output section in the forward-reverse direction; a trigger lever operated to start the motor; a forward / reverse switching lever operated to switch the rotation direction of the motor; a motor housing for housing the motor; a gripping housing extending downward from the motor housing; an operation button positioned on the motor housing and operated to change the motor's drive conditions; and a controller that sets the motor's drive conditions based on the operation of the operation button.

[0010] Invention Effects

[0011] According to the technology disclosed in this specification, the driving conditions of the motor can be smoothly changed in a drive drill. Attached Figure Description

[0012] Figure 1 This is a perspective view showing the drive drill involved in the implementation method as viewed from the front.

[0013] Figure 2 This is a perspective view showing the drive drill involved in the implementation method as viewed from the rear.

[0014] Figure 3 This is a side view showing the drive drill involved in the embodiment.

[0015] Figure 4 This is a cross-sectional view showing the drive drill involved in the implementation method.

[0016] Figure 5 This is a cross-sectional view showing a portion of the drive drill involved in the embodiment.

[0017] Figure 6 This is a diagram showing the dial involved in the implementation method as viewed from the front.

[0018] Figure 7 This is a cross-sectional view showing the dial and lighting unit involved in the implementation method.

[0019] Figure 8 This is a block diagram illustrating the drive drill involved in the implementation method.

[0020] Figure 9 This is a diagram illustrating an example of the use of the drive drill involved in the implementation method.

[0021] Figure 10This is a perspective view of the modified example involving the drive drill, viewed from the rear.

[0022] Figure 11 This is a diagram used to illustrate the driving conditions of the motor involved in the variation example.

[0023] Explanation of reference numerals in the attached figures

[0024] 1…Drive drill; 1B…Drive drill; 2…Housing; 2L…Left housing; 2R…Right housing; 2S…Screw; 3…Rear cover; 3S…Screw; 4…Outer cover; 4A…First outer cover; 4B…Second outer cover; 4C…Bracket plate; 4D…Baffle; 4E…Screw; 4S…Screw; 5…Battery assembly; 6…Motor; 7…Power transmission mechanism; 8…Output unit; 9…Fan; 10…Trigger lever; 11…Forward / reverse switch lever; 12…Speed ​​switch lever; 13…Mode switch ring; 14…Lighting unit; 15…Interface panel; 16…Dial (first operating component); 16A…Cam protrusion; 16B…Protrusion; 16C…Raised part; 16L…Recess; 16R…Recess; 16T…Raised part; 17…Manual switch ( 17B…Manual switch; 18…Controller; 19A…Air inlet; 19B…Exhaust outlet; 20…Battery pack; 21…Motor housing; 22…Holding part; 23…Battery holding part; 24…Operating device; 25…Display device; 26…Controller housing; 27…Panel opening; 28…Dial opening; 30…Reduction mechanism; 31…First planetary gear mechanism; 31C…First gear carrier; 31P…Planet gear; 31R…Internal gear; 31S…Pinus gear; 32…Second planetary gear mechanism; 32C…Second gear carrier; 32P…Planet gear; 32R…Internal gear; 32S…Sun gear; 33…Third planetary gear mechanism; 33C…Third gear carrier; 33P…Planet gear; 33R…Internal gear; 33S…Sun gear; 34…Speed ​​switching ring; 34M…Permanent magnet; 34T…Protrusion; 35…Connecting ring; 36…Helical spring; 40…Vibration mechanism; 41…First cam; 42…Second cam; 43…Vibration switching ring; 43S…Opposite part; 43T…Protrusion; 44…Stop ring; 45…Support ring; 46…Steel ball; 47…Washer; 48…Cam ring; 49…Mode detection ring; 49M…Permanent magnet; 51…Trigger signal generation circuit; 52…Forward / reverse operation sensor; 53…Speed ​​operation sensor; 54…Mode operation sensor; 55…Dial operation sensor; 56…Acceleration sensor; 61…Stator; 61A…Stator core; 61B…Front insulator; 61 C…Rear insulator; 61D…Coil; 61E…Sensor circuit board; 61F…Fuse terminal; 61G…Short circuit component; 62…Rotor; 62A…Rotor core; 62B…Permanent magnet; 63…Rotor shaft; 64…Bearing; 65…Bearing; 70…Front-end tool; 81…Spindle; 81F…Flange; 82…Chuck; 83…Bearing; 84…Bearing; 85…Locking cam; 86…Locking ring; 87…Helical spring; 161…Rod; 162…Permanent magnet; 163…Cam; 163A…Cam protrusion; 163T…Protrusion; 164…Helical spring; 165…Central recess; 166…Left recess; 167…Right recess; 168…Gutter; 169…Cover; AX…Rotating shaft; DX…Dial shaft. Detailed Implementation

[0025] In one or more embodiments, the drive drill may include: a motor; an output section disposed further forward than the motor and rotated by the rotational force of the motor; a trigger lever operated to start the motor; a forward / reverse switching lever operated to switch the rotational direction of the motor; a first operating member operated to change the drive conditions of the motor; a second operating member disposed further upward than the first operating member and operated to change the drive conditions of the motor; and a controller that sets the drive conditions of the motor based on the operation of at least one of the first and second operating members.

[0026] In the above configuration, in addition to the first operating component, a second operating component is also provided. The second operating component is positioned higher than the first operating component. When changing the motor's drive conditions, the operator can smoothly change the motor's drive conditions by operating the second operating component while maintaining the same working posture using the drive drill.

[0027] In one or more embodiments, the drive drill may include a housing having: a motor housing for housing a motor, a gripping portion extending downward from the motor housing, and a battery holding portion disposed at the lower part of the gripping portion. A first operating member may be disposed in the battery holding portion. A second operating member may be disposed in either the gripping portion or the motor housing.

[0028] In the above configuration, when the driving conditions of the motor are changed, the operator can operate the second operating component while maintaining the same working posture of holding the handle with his hand to smoothly change the driving conditions of the motor.

[0029] In one or more embodiments, the trigger lever may be positioned at the front of the gripping portion. The second operating member may be positioned above the trigger lever.

[0030] In the above configuration, when the motor's drive conditions are changed, the operator can operate the second operating component using their right index finger, for example, while maintaining the working posture of using the drive drill with their right hand, holding the handle. In other words, the operator can change the motor's drive conditions with one hand while maintaining the working posture of using the drive drill.

[0031] In one or more embodiments, the controller may stop the motor when the torque acting on the motor during motor drive exceeds a torque threshold. The drive condition may include the torque threshold.

[0032] In the above configuration, when the drive drill is set to clutch mode, the torque threshold is changed by operating the second operating component.

[0033] In one or more embodiments, the driving conditions may include: motor operation or time from when the torque exceeds a torque threshold until the motor stops.

[0034] In the above configuration, the operator can operate the second operating component and adjust the motor's driving conditions according to, for example, the operator's preferences.

[0035] In one or more embodiments, the second operating component may include a push-button switch. It may be configured such that a torque threshold is changed by a predetermined amount by performing a single push-button operation on the push-button switch.

[0036] In the above configuration, the operator can change the torque threshold by a predetermined amount by pushing the second operating component, which is a push-type switch.

[0037] In one or more embodiments, the torque threshold may be increased by performing a push operation on the push switch when the forward / reverse switching lever is in the first operating state, and decreased by performing a push operation on the push switch when the forward / reverse switching lever is in the second operating state.

[0038] In the above configuration, the torque threshold can be increased or decreased by combining the operating state of the forward / reverse switching lever with the operating state of the push-type switch.

[0039] In one or more embodiments, at least a portion of the forward / reverse switching lever and the push-button switch may be configured at the same height.

[0040] In the above configuration, the operator can, for example, use one hand to operate the forward / reverse switching lever and the second operating component, which is a push-type switch.

[0041] In one or more embodiments, the operating direction of the first operating component and the operating direction of the second operating component may be different.

[0042] In the above configuration, the operator can operate the easier-to-operate of the first and second operating components according to the working conditions to control the motor's drive conditions. In situations where, for example, operating the first operating component is difficult, the operator can use the second operating component to change the torque threshold. Similarly, in situations where operating the second operating component is difficult, the operator can use the first operating component to change the torque threshold.

[0043] In one or more embodiments, the first operating component may include a dial capable of rotating 360° or more.

[0044] In the above configuration, the operator can easily change the detailed drive conditions of the motor by rotating the dial. Furthermore, the dial can rotate more than 360°, thus allowing the operator to easily change the motor's drive conditions.

[0045] In one or more embodiments, the drive drill 1 may include a display device. The controller can display the motor's driving conditions on the display device.

[0046] In the above configuration, the operator can identify the motor's driving conditions by observing the display device.

[0047] In one or more embodiments, the driving conditions may include: the motor action or time from the operation of the trigger lever until the motor speed reaches a predetermined value.

[0048] In the above configuration, the operator can operate the second operating component and adjust the motor's driving conditions according to, for example, the operator's preferences.

[0049] In one or more embodiments, the drive drill may include an acceleration sensor. It may be configured such that when the acceleration sensor detects a value exceeding an acceleration threshold, the controller stops the motor. The drive condition may include the acceleration threshold.

[0050] In the above configuration, during operations such as those using a drive drill, if an excessive reaction force is applied to the drive drill, causing it to move excessively against the operator's force, the motor will stop. The operator can then operate the second control unit to adjust the acceleration threshold according to, for example, the operating conditions.

[0051] In one or more embodiments, the drive drill may include: a motor; an output section disposed further forward than the motor and rotated by the rotational force of the motor; a vibration section disposed between the motor and the output section, capable of switching between a situation where the output section vibrates in the front-to-back direction and a situation where the output section does not vibrate in the front-to-back direction; a trigger lever operated to start the motor; a forward / reverse switching lever operated to switch the rotation direction of the motor; a motor housing for housing the motor; a gripping housing extending downward from the motor housing; an operation button disposed on the motor housing and operated to change the drive conditions of the motor; and a controller that sets the drive conditions of the motor based on the operation of the operation button.

[0052] In the above configuration, an operation button is provided on the motor housing. When changing the motor's drive conditions, the operator can smoothly change the motor's drive conditions by operating the operation button while maintaining the same working posture when using the drive drill.

[0053] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings; however, the present invention is not limited thereto. The constituent elements of the embodiments described below can be appropriately combined. In addition, sometimes some constituent elements are not used.

[0054] In the implementation, terms such as left, right, front, back, up, and down are used to describe the positional relationships of the various parts. These terms indicate the relative position or direction with respect to the center of the drive drill.

[0055] The driving drill has a motor. In the embodiment, the direction parallel to the rotation axis AX of the motor is appropriately referred to as: axial direction, the direction around the rotation axis AX is appropriately referred to as: circumferential or rotational direction, and the radial direction of the rotation axis AX is appropriately referred to as: radial direction.

[0056] In this implementation, the rotation axis AX extends along the front-to-back direction. The axial direction is consistent with the front-to-back direction. One side of the axial direction is the front, and the other side is the rear. Furthermore, regarding the radial direction, the position closer to or near the rotation axis AX is appropriately referred to as the "radial inner side," and the position farther from or away from the rotation axis AX is appropriately referred to as the "radial outer side."

[0057] [Overview of Drive Drill]

[0058] Figure 1 This is a perspective view showing the drive drill 1 involved in the embodiment as viewed from the front. Figure 2 This is a perspective view showing the drive drill 1 involved in the embodiment as viewed from the rear. Figure 3 This is a side view showing the drive drill 1 according to the embodiment. Figure 4 This is a cross-sectional view showing the drive drill 1 according to the embodiment. In the embodiment, the drive drill 1 is a vibration drive drill.

[0059] like Figure 1 , Figure 2 , Figure 3 ,as well as Figure 4 As shown, the drive drill 1 includes: a housing 2, a rear cover 3, an outer cover 4, a battery assembly 5, a motor 6, a power transmission mechanism 7, an output unit 8, a fan 9, a trigger lever 10, a forward / reverse switching lever 11, a speed switching lever 12, a mode switching ring 13, a lighting unit 14, an interface panel 15, a dial 16, a manual switch 17, and a controller 18.

[0060] The outer casing 2 is made of synthetic resin. In this embodiment, the outer casing 2 is made of nylon. The outer casing 2 includes a left outer casing 2L and a right outer casing 2R. The left outer casing 2L and the right outer casing 2R are fixed together by screws 2S. The outer casing 2 is formed by fixing the left outer casing 2L and the right outer casing 2R together.

[0061] The housing 2 includes a motor housing 21, a gripping part 22, and a battery holding part 23.

[0062] The motor housing 21 is used to house the motor 6. The motor housing 21 is cylindrical.

[0063] The grip 22 is provided for the operator to hold. The grip 22 is located below the motor housing 21. The grip 22 extends downward from the motor housing 21. The trigger lever 10 is located at the front of the grip 22.

[0064] The battery holding section 23 is used to house the controller 18. The battery holding section 23 is disposed at the lower part of the grip section 22. The battery holding section 23 is connected to the lower end of the grip section 22. In all directions, including the front-back direction and the left-right direction, the external dimensions of the battery holding section 23 are larger than the external dimensions of the grip section 22.

[0065] The rear cover 3 is made of synthetic resin. The rear cover 3 is positioned behind the motor housing 21. The rear cover 3 is used to house the fan 9. The rear cover 3 is configured to cover the opening at the rear of the motor housing 21. The rear cover 3 is fixed to the motor housing 21 by screws 3S.

[0066] The motor housing 21 has an air inlet 19A. The rear cover 3 has an exhaust outlet 19B. Air from the external space of the housing 2 flows into the internal space of the housing 2 through the air inlet 19A. Air from the internal space of the housing 2 flows out to the external space of the housing 2 through the exhaust outlet 19B.

[0067] The outer casing 4 is used to house the power transmission mechanism 7. The outer casing 4 includes a first outer casing 4A and a second outer casing 4B. The second outer casing 4B is positioned in front of the first outer casing 4A. The mode switching ring 13 is positioned in front of the second outer casing 4B. The first outer casing 4A is made of synthetic resin. The second outer casing 4B is made of metal. In this embodiment, the second outer casing 4B is made of aluminum. The outer casing 4 is positioned in front of the motor housing 21. Both the first outer casing 4A and the second outer casing 4B are cylindrical.

[0068] The first outer cover 4A is fixed to the rear end of the second outer cover 4B. The opening at the rear end of the first outer cover 4A is covered by a bracket plate 4C. The opening at the front end of the second outer cover 4B is covered by a baffle 4D. The baffle 4D is fixed to the front end of the second outer cover 4B by screws 4E.

[0069] The outer cover 4 is configured to cover the opening at the front of the motor housing 21. The first outer cover 4A is located inside the motor housing 21. The second outer cover 4B is fixed to the motor housing 21 by screws 4S.

[0070] A battery assembly 5 is formed at the lower part of the battery holding part 23. The battery assembly 5 is connected to the battery pack 20. The battery pack 20 is assembled to the battery assembly 5. The battery pack 20 is detachable from the battery assembly 5. The battery pack 20 includes a secondary battery. In this embodiment, the battery pack 20 includes a rechargeable lithium-ion battery. The battery pack 20, by being assembled to the battery assembly 5, can supply power to the drive drill 1. The motor 6 is driven based on the power supplied from the battery pack 20. The interface panel 15 and the controller 18 operate based on the power supplied from the battery pack 20.

[0071] Motor 6 is the power source driving drill 1. Motor 6 is an internal rotor type brushless motor. Motor 6 is housed in motor housing 21. Motor 6 has a cylindrical stator 61 and a rotor 62 disposed inside the stator 61. Rotor 62 includes a rotor shaft 63 extending axially.

[0072] The power transmission mechanism 7 is positioned in front of the motor 6. The power transmission mechanism 7 is housed within the outer casing 4. The power transmission mechanism 7 connects the rotor shaft 63 to the output section 8. The power transmission mechanism 7 transmits the power generated by the motor 6 to the output section 8. The power transmission mechanism 7 has multiple gears.

[0073] The power transmission mechanism 7 includes a speed reduction mechanism 30 and a vibration mechanism 40.

[0074] The reduction mechanism 30 slows down the rotation of the rotor shaft 63, causing the output unit 8 to rotate at a lower speed than the rotor shaft 63. In this embodiment, the reduction mechanism 30 includes a first planetary gear mechanism 31, a second planetary gear mechanism 32, and a third planetary gear mechanism 33. The second planetary gear mechanism 32 is positioned in front of the first planetary gear mechanism 31. The third planetary gear mechanism 33 is positioned in front of the second planetary gear mechanism 32.

[0075] The vibration mechanism 40 causes the output unit 8 to vibrate axially. The vibration mechanism 40 includes a first cam 41, a second cam 42, and a vibration switching ring 43.

[0076] The output unit 8 is positioned further forward than the motor 6. The output unit 8 rotates using the rotational force of the motor 6. The output unit 8 rotates based on the rotational force transmitted from the motor 6 via the power transmission mechanism 7, with a front-end tool mounted on it. The output unit 8 includes a spindle 81 that rotates around the rotation axis AX based on the rotational force transmitted from the motor 6, and a chuck 82 for mounting the front-end tool.

[0077] Fan 9 is positioned behind motor 6. Fan 9 generates airflow to cool motor 6. Fan 9 is fixed to at least a portion of rotor 62. Fan 9 is fixed to the rear of rotor shaft 63. Fan 9 rotates as rotor shaft 63 rotates. As rotor shaft 63 rotates, fan 9 rotates together with rotor shaft 63. Due to the rotation of fan 9, air from the external space of housing 2 flows into the internal space of housing 2 through intake port 19A. The air flowing into the internal space of housing 2 cools motor 6 by circulating within the internal space of housing 2. The air circulating within the internal space of housing 2 flows out to the external space of housing 2 through exhaust port 19B.

[0078] The trigger lever 10 is operated to start the motor 6. The trigger lever 10 is located on the upper part of the grip 22. The front end of the trigger lever 10 protrudes forward from the front of the grip 22. The trigger lever 10 can move in the forward-backward direction. The trigger lever 10 is operated by the operator. By operating the trigger lever 10 in a rearward direction, the motor 6 is started. By releasing the operation of the trigger lever 10, the motor 6 is stopped.

[0079] The forward / reverse switching lever 11 is operated to switch the rotation direction of the motor 6. The forward / reverse switching lever 11 is located on the upper part of the handle 22. The left end of the forward / reverse switching lever 11 protrudes to the left from the left side of the handle 22. The right end of the forward / reverse switching lever 11 protrudes to the right from the right side of the handle 22. The forward / reverse switching lever 11 can move in the left and right directions. The forward / reverse switching lever 11 is operated by the operator. By moving the forward / reverse switching lever 11 to the left, the motor 6 rotates in the forward direction. By moving the forward / reverse switching lever 11 to the right, the motor 6 rotates in the reverse direction. By switching the rotation direction of the motor 6, the rotation direction of the spindle 81 is switched.

[0080] The speed switching lever 12 is operated to change the speed mode of the reduction mechanism 30. The speed switching lever 12 is located on the upper part of the motor housing 21. The speed switching lever 12 can move in the forward and backward direction. The speed switching lever 12 is operated by the operator. The speed modes of the reduction mechanism 30 include a low-speed mode and a high-speed mode. The low-speed mode refers to a speed mode in which the output unit 8 rotates at a low speed. The high-speed mode refers to a speed mode in which the output unit 8 rotates at a high speed. By operating the speed switching lever 12 in a forward direction, the speed mode of the reduction mechanism 30 is set to the low-speed mode. By operating the speed switching lever 12 in a backward direction, the speed mode of the reduction mechanism 30 is set to the high-speed mode.

[0081] The mode switching ring 13 is operated to change the operating mode of the vibration mechanism 40. The mode switching ring 13 is positioned in front of the outer casing 4. The mode switching ring 13 is rotatable. The mode switching ring 13 is operated by the operator. The operating modes of the vibration mechanism 40 include a vibration mode and a non-vibration mode. The vibration mode refers to the operating mode in which the output unit 8 vibrates axially. The non-vibration mode refers to the operating mode in which the output unit 8 does not vibrate axially. By operating the mode switching ring 13 in the vibration mode position, which is positioned in the rotational direction, the operating mode of the vibration mechanism 40 is set to vibration mode. By operating the mode switching ring 13 in the non-vibration mode position, which is positioned in the rotational direction, the operating mode of the vibration mechanism 40 is set to non-vibration mode.

[0082] The illumination unit 14 emits illumination light to illuminate the front of the drive drill 1. The illumination unit 14 includes, for example, a light-emitting diode (LED). The illumination unit 14 is located on the left side of the front portion of the battery holding section 23.

[0083] An interface panel 15 is disposed in the battery holding section 23. The interface panel 15 includes an operation device 24 and a display device 25. The interface panel 15 is plate-shaped. The operation device 24 includes operation buttons. Examples of the display device 25 include: a segmented display including multiple segmented light emitters, a flat panel display such as a liquid crystal display, and an indicator light type display with multiple light-emitting diodes.

[0084] A panel opening 27 is formed in the battery holding portion 23. The panel opening 27 is formed on the upper surface of the battery holding portion 23 at a position further forward than the grip portion 22. At least a portion of the interface panel 15 is disposed in the panel opening 27.

[0085] Operating device 24 is operated to change the drive mode of motor 6. Operating device 24 is operated by the operator. The drive modes of motor 6 include: drilling mode and clutch mode. Drilling mode refers to a drive mode in which motor 6 is driven regardless of the torque applied to it. Clutch mode refers to a drive mode in which motor 6 stops when the torque applied to it exceeds a torque threshold.

[0086] Dial 16 is a first operating component operated to change the drive conditions of motor 6. Dial 16 is located on the right side of the front of battery holding section 23. Dial 16 is rotatable about dial shaft DX. Dial shaft DX extends in the left-right direction. Dial 16 can rotate 360° or more. Dial 16 is operated by the operator. The drive conditions of motor 6 include a torque threshold. Dial 16 is operated to change the torque threshold in the clutch mode set by operating device 24.

[0087] A dial opening 28 is formed in the battery holding section 23. The dial opening 28 is formed on the right side of the front part of the battery holding section 23. At least a portion of the dial 16 is disposed in the dial opening 28.

[0088] The manual switch 17 is a second operating component operated to change the drive conditions of the motor 6. The manual switch 17 is positioned above the dial 16. The manual switch 17 is located in either the grip 22 or the motor housing 21. In this embodiment, the manual switch 17 is positioned at the front of the grip 22, above the trigger lever 10 and below the mode switching ring 13. The forward / reverse switching lever 11 and at least a portion of the manual switch 17 are positioned at the same height. The front end of the manual switch 17 protrudes forward from the front of the grip 22. The manual switch 17 is movable in the forward / backward direction. The manual switch 17 is operated by the operator. The manual switch 17 is a push-button switch. The drive conditions of the motor 6 are changed by operating the manual switch 17 in a rearward-facing manner. As described above, the drive conditions of the motor 6 include a torque threshold. In clutch mode, the torque threshold is changed by a predetermined amount by pushing the manual switch 17 once.

[0089] The controller 18 includes a computer system. The controller 18 outputs control commands for controlling the motor 6. At least a portion of the controller 18 is housed in a controller housing 26. While held in the controller housing 26, the controller 18 is housed in a battery holder 23. The controller 18 includes a circuit board on which multiple electronic components are mounted. Examples of electronic components mounted on the circuit board include: a processor such as a CPU (Central Processing Unit), non-volatile memory such as ROM (Read Only Memory) or RAM (Random Access Memory), transistors, capacitors, and resistors.

[0090] The controller 18 sets the drive conditions of the motor 6 based on the operation of at least one of the dial 16 and the manual switch 17. As described above, the drive conditions of the motor 6 include a torque threshold. In clutch mode, the controller 18 sets the torque threshold based on the operation of at least one of the dial 16 and the manual switch 17.

[0091] In addition, in clutch mode, when the torque acting on motor 6 during the drive of motor 6 exceeds the set torque threshold, controller 18 stops motor 6.

[0092] Additionally, the controller 18 displays the set drive conditions of the motor 6 on the display device 25. The controller 18 also displays the set torque threshold on the display device 25.

[0093] [Motor and power transmission mechanism]

[0094] Figure 5This is a cross-sectional view showing a portion of the drive drill 1 according to the embodiment. For example... Figure 5 As shown, the motor 6 has a cylindrical stator 61 and a rotor 62 disposed inside the stator 61. The rotor 62 includes a rotor shaft 63 extending axially.

[0095] The stator 61 includes: a stator core 61A comprising multiple stacked steel plates; a front insulator 61B disposed at the front of the stator core 61A; a rear insulator 61C disposed at the rear of the stator core 61A; multiple coils 61D wound around the stator core 61A via the front insulator 61B and the rear insulator 61C; a sensor circuit board 61E mounted on the front insulator 61B; a fuse terminal 61F connected to the coils 61D; and a short-circuit component 61G supported on the front insulator 61B. The sensor circuit board 61E includes multiple rotation detection elements for detecting the rotation of the rotor 62. The short-circuit component 61G connects the multiple coils 61D via the fuse terminal 61F. The short-circuit component 61G is connected to the controller 18 via leads.

[0096] Rotor 62 rotates about a rotation axis AX. Rotor 62 includes: a rotor shaft 63, a rotor core 62A disposed around the rotor shaft 63, and a plurality of permanent magnets 62B held in the rotor core 62A. The rotor core 62A is cylindrical. The rotor core 62A comprises: a plurality of stacked steel plates. The rotor core 62A has through holes extending axially. Multiple through holes are formed circumferentially. The permanent magnets 62B are respectively disposed in the plurality of through holes of the rotor core 62A.

[0097] The rotation detection element on the sensor circuit board 61E detects the rotation of the rotor 62 by detecting the magnetic field of the permanent magnet 62B. The controller 18 supplies drive current to the coil 61D based on the detection data of the rotation detection element.

[0098] The rotor shaft 63 rotates around the rotation axis AX. The rotation axis AX of the rotor shaft 63 coincides with the rotation axis of the output section 8. The front part of the rotor shaft 63 is rotatably supported by the bearing 64. The rear part of the rotor shaft 63 is rotatably supported by the bearing 65. The bearing 64 is held in a bracket plate 4C positioned in front of the stator 61. The bearing 65 is held in the rear cover 3. The front end of the rotor shaft 63 is positioned further forward than the bearing 64. The front end of the rotor shaft 63 is located within the interior space of the outer cover 4.

[0099] A pinion 31S is provided at the front end of the rotor shaft 63. The rotor shaft 63 is connected to the first planetary gear mechanism 31 of the reduction mechanism 30 via the pinion 31S.

[0100] The first planetary gear mechanism 31 includes: a plurality of planetary gears 31P disposed around the pinion 31S; a first gear carrier 31C for supporting the plurality of planetary gears 31P; and an internal gear 31R disposed around the plurality of planetary gears 31P. A gear is provided on the outer periphery of the first gear carrier 31C.

[0101] The second planetary gear mechanism 32 includes: a sun gear 32S, a plurality of planetary gears 32P disposed around the sun gear 32S, a second gear carrier 32C for supporting the plurality of planetary gears 32P, and an internal gear 32R disposed around the plurality of planetary gears 32P. The sun gear 32S is positioned in front of the first gear carrier 31C. The diameter of the sun gear 32S is smaller than the diameter of the first gear carrier 31C. The first gear carrier 31C is integral with the sun gear 32S. The first gear carrier 31C rotates together with the sun gear 32S.

[0102] The third planetary gear mechanism 33 includes: a sun gear 33S, a plurality of planetary gears 33P disposed around the sun gear 33S, a third gear carrier 33C for supporting the plurality of planetary gears 33P, and an internal gear 33R disposed around the plurality of planetary gears 33P. The sun gear 33S is positioned in front of the second gear carrier 32C.

[0103] Furthermore, the deceleration mechanism 30 includes a speed switching ring 34 connected to the speed switching lever 12, and a connecting ring 35 positioned in front of the speed switching ring 34. The connecting ring 35 is fixed to the inner surface of the first outer cover 4A. A gear is provided on the inner circumference of the connecting ring 35. The speed switching ring 34 has an upwardly protruding protrusion 34T. Coil springs 36 are provided in front of and behind the protrusion 34T, respectively. The speed switching ring 34 is connected to the speed switching lever 12 by means of the coil springs 36.

[0104] Speed ​​switching ring 34 switches between low-speed and high-speed modes. Speed ​​switching ring 34 is connected to internal gear 32R. Speed ​​switching lever 12 is connected to internal gear 32R via speed switching ring 34. Speed ​​switching lever 12, speed switching ring 34, and internal gear 32R can move as a single unit. By operating speed switching lever 12, the operator moves speed switching ring 34 along the front-back direction inside the first outer cover 4A. Speed ​​switching ring 34 switches between low-speed and high-speed modes by moving along the front-back direction between a low-speed mode position and a high-speed mode position further back than the low-speed mode position, while internal gear 32R is engaged with planetary gear 32P. The operation of speed switching lever 12 switches between low-speed and high-speed modes.

[0105] When the internal gear 32R is in the low-speed mode position, it is in contact with the engagement ring 35. This contact restricts the rotation of the internal gear 32R. When the internal gear 32R is in the high-speed mode position, it disengages from the engagement ring 35. This disengagement allows the internal gear 32R to rotate.

[0106] Furthermore, when the internal gear 32R is in the low-speed mode position, it meshes with the planetary gear 32P. When the internal gear 32R is in the high-speed mode position, it meshes with both the planetary gear 32P and the first gear carrier 31C.

[0107] With the internal gear 32R in the low-speed mode, when the rotor shaft 63 rotates due to the drive of the motor 6, the pinion 31S rotates, causing the planetary gear 31P to revolve around it. Through the revolution of the planetary gear 31P, the first gear carrier 31C and the sun gear 32S rotate at a speed lower than the rotational speed of the rotor shaft 63. When the sun gear 32S rotates, the planetary gear 32P revolves around it. Through the revolution of the planetary gear 32P, the second gear carrier 32C and the sun gear 33S rotate at a speed lower than the rotational speed of the first gear carrier 31C. Thus, with the internal gear 32R in the low-speed mode, when the motor 6 is driven, the deceleration functions of both the first planetary gear mechanism 31 and the second planetary gear mechanism 32 are utilized, causing the second gear carrier 32C and the sun gear 33S to rotate in a low-speed mode.

[0108] With the internal gear 32R in the high-speed mode position, when the rotor shaft 63 rotates due to the drive of the motor 6, the pinion 31S rotates, causing the planetary gear 31P to revolve around the pinion 31S. Due to the revolution of the planetary gear 31P, the first gear carrier 31C and the sun gear 32S rotate at a speed lower than the rotational speed of the rotor shaft 63. With the internal gear 32R in the high-speed mode position, the internal gear 32R meshes with the planetary gear 32P and the first gear carrier 31C, so the internal gear 32R rotates together with the first gear carrier 31C. Due to the rotation of the internal gear 32R, the planetary gear 32P revolves at the same rotational speed as the internal gear 32R. Due to the revolution of the planetary gear 32P, the second gear carrier 32C and the sun gear 33S rotate at the same rotational speed as the first gear carrier 31C. Thus, when the internal gear 32R is configured in the high-speed mode position, the deceleration function of the first planetary gear mechanism 31 is activated when the motor 6 is driven, but the deceleration function of the second planetary gear mechanism 32 is not activated, thereby the second gear carrier 32C and the sun gear 33S rotate in high-speed mode.

[0109] When the second gear carrier 32C and the sun gear 33S rotate, the planet gear 33P revolves around the sun gear 33S. The third gear carrier 33C rotates due to the revolution of the planet gear 33P.

[0110] The main shaft 81 is connected to the third gear carrier 33C via a locking cam 85. The main shaft 81 and the locking cam 85 are splined together. The locking cam 85 is rotatably supported by a locking ring 86. The locking ring 86 is located inside the second outer cover 4B. The locking ring 86 is fixed to the second outer cover 4B. The main shaft 81 rotates by rotating the third gear carrier 33C.

[0111] The spindle 81 is supported by bearings 83 and 84 and is rotatable. While supported by bearings 83 and 84, the spindle 81 can move in the back-and-forth direction.

[0112] The spindle 81 has a flange 81F. A helical spring 87 is disposed between the flange 81F and the bearing 83. The helical spring 87 generates a spring force for moving the spindle 81 forward.

[0113] The chuck 82 holds the front-end tool. The chuck 82 is connected to the front of the spindle 81. Rotation of the spindle 81 causes the chuck 82 to rotate. The chuck 82 rotates while holding the front-end tool.

[0114] The first cam 41 and the second cam 42 of the vibration mechanism 40 are respectively positioned inside the second outer cover 4B. In the front-rear direction, the first cam 41 and the second cam 42 are respectively positioned between the bearing 83 and the bearing 84.

[0115] The first cam 41 is annular. The first cam 41 is positioned around the main shaft 81. The first cam 41 is fixed to the main shaft 81. The first cam 41 rotates together with the main shaft 81. Cam teeth are provided on the rear surface of the first cam 41. The first cam 41 is supported by a retaining ring 44. The retaining ring 44 is positioned around the main shaft 81. In the front-rear direction, the retaining ring 44 is positioned between the first cam 41 and the bearing 83. The retaining ring 44 contacts the rear surface of the bearing 83 by the force of the coil spring 87.

[0116] The second cam 42 is annular. The second cam 42 is positioned behind the first cam 41. The second cam 42 is positioned around the main shaft 81. The second cam 42 is capable of relative rotation with the main shaft 81. Cam teeth are provided on the front surface of the second cam 42. The front cam teeth of the second cam 42 mesh with the cam teeth on the rear surface of the first cam 41. A pawl is provided on the rear surface of the second cam 42.

[0117] A support ring 45 is disposed between the second cam 42 and the bearing 84 in the front-rear direction. The support ring 45 is disposed up to the inside of the second outer cover 4B. The support ring 45 is fixed to the second outer cover 4B. A plurality of steel balls 46 are disposed on the front surface of the support ring 45. A washer 47 is disposed between the steel balls 46 and the second cam 42. The second cam 42 can rotate within the space defined by the small diameter portion 402 and the washer 47, with its back-and-forth movement restricted.

[0118] Vibration switching ring 43 switches between vibration mode and non-vibration mode. Mode switching ring 13 is connected to vibration switching ring 43 via cam ring 48. Mode switching ring 13 and cam ring 48 can rotate integrally. Vibration switching ring 43 can move in the front-back direction. Vibration switching ring 43 has a protrusion 43T. Protrusion 43T is inserted into a guide hole provided in the second outer cover 4B. Vibration switching ring 43 can move in the front-back direction while being guided through the guide hole provided in the second outer cover 4B. The rotation of vibration switching ring 43 can be limited by the protrusion 43T. Vibration switching ring 43 moves in the front-back direction by the operator operating mode switching ring 13. Vibration switching ring 43 switches between vibration mode and non-vibration mode by moving in the front-back direction between a forward position and a backward position further back than the forward position. Vibration mode and non-vibration mode are switched by operating mode switching ring 13.

[0119] The vibration mode includes a state in which the rotation of the second cam 42 is restricted. The non-vibration mode includes a state in which the rotation of the second cam 42 is permitted. When the vibration switching ring 43 moves toward the forward position, the rotation of the second cam 42 is restricted. When the vibration switching ring 43 moves toward the reverse position, the rotation of the second cam 42 is permitted.

[0120] In vibration mode, at least a portion of the vibration switching ring 43, which has moved to the forward position, contacts the second cam 42. The contact between the vibration switching ring 43 and the second cam 42 restricts the rotation of the second cam 42. With the rotation of the second cam 42 restricted, when the motor 6 is driven, the first cam 41, fixed to the main shaft 81, rotates while abutting against the cam teeth of the second cam 42. Thus, the main shaft 81 vibrates and rotates simultaneously in the forward and backward direction.

[0121] In non-vibration mode, the vibration switching ring 43, which has moved to the retracted position, disengages from the second cam 42. Disengagement of the vibration switching ring 43 from the second cam 42 allows rotation of the second cam 42. With rotation of the second cam 42 permitted, when the motor 6 is driven, the second cam 42 rotates together with the first cam 41 and the main shaft 81. Thus, the main shaft 81 rotates without vibrating in the forward or backward direction.

[0122] The vibration switching ring 43 is disposed around the first cam 41 and the second cam 42. Furthermore, the vibration switching ring 43 has an opposing portion 43S opposite to the rear surface of the second cam 42. The opposing portion 43S protrudes radially inward from the rear portion of the vibration switching ring 43.

[0123] When the mode switching ring 13 is operated, causing the vibration switching ring 43 to move towards the forward position, the pawl on the rear surface of the second cam 42 comes into contact with the opposing portion 43S of the vibration switching ring 43. This restricts the rotation of the second cam 42. Thus, by operating the mode switching ring 13 to move the vibration switching ring 43 towards the forward position, the vibration mechanism 40 is switched to a vibration mode.

[0124] When the mode switching ring 13 is operated to move the vibration switching ring 43 to the rearward position, the opposing portion 43S of the vibration switching ring 43 separates from the second cam 42. This allows rotation of the second cam 42. Thus, by operating the mode switching ring 13 to move the vibration switching ring 43 to the rearward position, the vibration mechanism 40 is switched to a non-vibration mode.

[0125] [Dial]

[0126] Figure 6This is a diagram showing the dial 16 involved in the implementation method from the front. Figure 7 This is a cross-sectional view showing the dial 16 and the lighting unit 14 according to the embodiment. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 ,as well as Figure 7 As shown, the dial 16 is located on the right side of the front portion of the battery holding section 23. The lighting unit 14 is located on the left side of the front portion of the battery holding section 23.

[0127] At least a portion of the dial 16 is disposed in a dial opening 28 formed in the battery holding section 23. The dial opening 28 is formed in the right side of the front portion of the battery holding section 23.

[0128] The dial 16 is positioned in front of the controller 18. The dial 16 is cylindrical. The dial 16 is operated by the operator. Multiple protrusions 16T are provided on the surface of the dial 16. The protrusions 16T have an anti-slip function. The front and upper parts of the dial 16 are respectively positioned further outward than the surface of the battery holder 23.

[0129] The dial 16 rotates around a dial axis DX that extends in the left-right direction. As described above, the rotation axis AX of the motor 6 extends in the front-back direction. In this embodiment, the rotation axis AX of the motor 6 is orthogonal to an axis parallel to the dial axis DX.

[0130] The drive drill 1 includes: a rod 161 disposed inside the dial 16, a permanent magnet 162 supported on the rod 161, a cam 163 supported on the rod 161, and a helical spring 164 disposed around the rod 161.

[0131] The lever 161 is held in front of the controller 18 and at least a portion thereof in the battery holding section 23. The left and right ends of the lever 161 are respectively held in the battery holding section 23.

[0132] Dial 16 is positioned around lever 161. Dial 16 is rotatably supported on lever 161. Dial 16 can rotate more than 360° in both the forward and reverse directions centered on dial axis DX.

[0133] A recess 16L is provided on the left surface of the dial 16. A cam protrusion 16A is provided inside the recess 16L. A recess 16R is provided on the right surface of the dial 16. A protrusion 16B is provided inside the recess 16R. In addition, annular protrusions 16C are provided on both the left and right surfaces of the dial 16.

[0134] The permanent magnet 162 rotates together with the dial 16. The permanent magnet 162 is positioned at a different location from the dial 16 in a direction parallel to the dial axis DX. In this embodiment, the permanent magnet 162 is positioned on the right side of the dial 16. The permanent magnet 162 is cylindrical. At least a portion of the lever 161 is positioned inside the permanent magnet 162. The permanent magnet 162 is positioned around the lever 161. The permanent magnet 162 is fixed to the dial 16 by, for example, an adhesive.

[0135] The cam 163 is positioned at a different location from the dial 16 in a direction parallel to the dial axis DX. In this embodiment, the cam 163 is positioned to the left of the dial 16. The cam 163 is cylindrical. At least a portion of the lever 161 is positioned inside the cam 163. The cam 163 is positioned around the lever 161. The cam 163 is movable relative to the lever 161 in a left-right direction. A cam protrusion 163A is provided on the right surface of the cam 163. Two protrusions 163T are provided on the outer surface of the cam 163.

[0136] The coil spring 164 is positioned at a different location from the dial 16 in a direction parallel to the dial axis DX. In this embodiment, the coil spring 164 is positioned to the left of the dial 16. At least a portion of the lever 161 is positioned inside the coil spring 164. The coil spring 164 is positioned around the lever 161. At least a portion of the coil spring 164 is positioned inside the cam 163.

[0137] The battery holding section 23 has a central recess 165 for the dial 16, a left recess 166 for the cam 163, and a right recess 167 for the permanent magnet 162.

[0138] The left end of rod 161 is held in at least a portion of the inner surface of the left recess 166. The right end of rod 161 is held in at least a portion of the inner surface of the right recess 167.

[0139] The protrusion 163T of the cam 163 is inserted into a groove 168 formed inside the left recess 166. This restricts the rotation of the cam 163.

[0140] The right portion of cam 163 is inserted into the recess 16L of dial 16. The right portion of coil spring 164 is positioned inside cam 163. The left portion of coil spring 164 is supported on at least a portion of the inner surface of left recess 166. By supporting coil spring 164 on at least a portion of the inner surface of left recess 166, rotation of coil spring 164 is limited. Coil spring 164 generates a spring force for moving cam 163 to the right.

[0141] When the operator operates the dial 16, the dial 16 rotates relative to the cam 163 while the cam 163 is pressed against the dial 16 by the coil spring 164. The dial 16 rotates while the cam protrusion 16A and the cam protrusion 163A collide. As a result, a clicking sensation is produced during the rotation of the dial 16.

[0142] The left portion of the permanent magnet 162 is inserted into the recess 16R of the dial 16. The left portion of the permanent magnet 162 is inserted into the recess 16R of the dial 16 by inserting the protrusion 16B into the notch located at the left side of the permanent magnet 162. This restricts the relative rotation between the dial 16 and the permanent magnet 162. The permanent magnet 162 rotates together with the dial 16.

[0143] Annular protrusions 16C are provided on the left and right surfaces of the dial 16. A cover 169 is provided in the battery holding section 23 to cover the protrusions 16C. The protrusions 16C and the cover 169 can prevent foreign objects from entering the internal space of the battery holding section 23 from between the housing 2 and the dial 16.

[0144] [Controller]

[0145] Figure 8 This is a block diagram illustrating the drive drill 1 according to the embodiment. For example... Figure 8 As shown, the drive drill 1 includes: a sensor circuit board 61E, a trigger lever 10, a forward / reverse switching lever 11, a speed switching lever 12, a mode switching ring 13, a dial 16, a manual switch 17, an operating device 24, a trigger signal generation circuit 51, a forward / reverse operation sensor 52, a speed operation sensor 53, a mode operation sensor 54, a dial operation sensor 55, an acceleration sensor 56, a controller 18, a motor 6, and a display device 25.

[0146] The controller 18 calculates the torque acting on the motor 6. The controller 18 can calculate the torque acting on the motor 6 based on the drive current value supplied to the coil 61D and the rotational speed of the rotor 62 detected by the rotational detection element of the sensor circuit board 61E.

[0147] like Figure 4 As shown, the trigger signal generation circuit 51 is disposed inside the gripping part 22. The trigger signal generation circuit 51 generates a trigger signal based on the operation amount of the trigger lever 10. The trigger signal generated in the trigger signal generation circuit 51 is output to the controller 18. The controller 18 drives the motor 6 based on the trigger signal from the trigger signal generation circuit 51.

[0148] The forward / reverse operation sensor 52 is used to detect the operating state of the forward / reverse switching lever 11. The forward / reverse operation sensor 52 is used to detect the position of the forward / reverse switching lever 11 as it moves in the left-right direction.

[0149] The detection data from the forward / reverse operation sensor 52 is output to the controller 18. The controller 18 detects the position of the speed switching lever 12 based on the detection data from the forward / reverse operation sensor 52. The controller 18 can determine, based on the detection data from the forward / reverse operation sensor 52, whether the rotation direction of the motor 6 is set to forward or reverse.

[0150] The speed operation sensor 53 is used to detect the operating status of the speed switching lever 12. For example... Figure 5 As shown, a permanent magnet 34M is provided on the speed switching ring 34. A speed operation sensor 53 is positioned below the speed switching ring 34. The speed operation sensor 53 includes a magnetic sensor such as a Hall element. When the speed switching lever 12 is operated, the permanent magnet 34M moves along the forward and backward direction together with the speed switching lever 12 and the speed switching ring 34. The speed operation sensor 53 is used to detect changes in the magnetic field of the moving permanent magnet 34M.

[0151] The detection data from the speed operation sensor 53 is output to the controller 18. The controller 18 detects the position of the speed switching lever 12 based on the detection data from the speed operation sensor 53. The controller 18 can determine, based on the detection data from the speed operation sensor 53, whether the deceleration mechanism 30 is set to high-speed mode or low-speed mode.

[0152] The mode operation sensor 54 is used to detect the operating status of the mode switching ring 13. For example... Figure 5 As shown, a mode detection ring 49 is provided, which rotates integrally with the mode switching ring 13. The mode detection ring 49 is positioned inside the mode switching ring 13. A permanent magnet 49M is provided in the mode detection ring 49. A mode operation sensor 54 is positioned below the mode detection ring 49. The mode operation sensor 54 includes a magnetic sensor such as a Hall element. When the mode switching ring 13 is operated, the permanent magnet 49M rotates together with the mode switching ring 13 and the mode detection ring 49. The mode operation sensor 54 is used to detect changes in the magnetic field of the rotating permanent magnet 49M.

[0153] The detection data from the mode operation sensor 54 is output to the controller 18. The controller 18 detects the position of the rotation direction of the mode switching ring 13 based on the detection data from the mode operation sensor 54. The controller 18 can determine, based on the detection data from the mode operation sensor 54, whether the vibration mechanism 40 is set to vibration mode or non-vibration mode.

[0154] The dial operation sensor 55 is used to detect the operating state of the dial 16. The dial operation sensor 55 includes a magnetic sensor such as a Hall element. The dial operation sensor 55 is used to detect the permanent magnet 162. The dial operation sensor 55 is positioned behind the permanent magnet 162. When the dial 16 is operated, the permanent magnet 162 rotates along with the dial 16. The dial operation sensor 55 is used to detect changes in the magnetic field of the rotating permanent magnet 162.

[0155] The permanent magnet 162 has N and S poles alternately arranged circumferentially on the dial axis DX. The operator can rotate the dial 16 in both the forward and reverse directions centered on the dial axis DX. As the dial 16 is rotated, the permanent magnet 162 rotates together with the dial 16.

[0156] When the dial 16 is rotated so that the S pole is opposite the dial operation sensor 55, the magnetic field lines between the permanent magnet 162 and the dial operation sensor 55 move from the dial operation sensor 55 toward the permanent magnet 162. When the dial 16 is rotated so that the N pole and the S pole, which is positioned higher than the N pole, are opposite the dial operation sensor 55, the magnetic field lines between the permanent magnet 162 and the dial operation sensor 55 move from the N pole toward the S pole. When the dial 16 is rotated so that the N pole is opposite the dial operation sensor 55, the magnetic field lines between the permanent magnet 162 and the dial operation sensor 55 move from the permanent magnet 162 toward the dial operation sensor 55. When the dial 16 is rotated, and the S pole and the N pole, which is positioned above the S pole, are respectively opposite to the dial operation sensor 55, the magnetic lines of force between the permanent magnet 162 and the dial operation sensor 55 will move from the N pole toward the S pole.

[0157] Thus, the direction of movement of the magnetic field lines between the permanent magnet 162 and the dial operation sensor 55 changes based on the rotation angle of the dial 16. That is, the magnetic field between the permanent magnet 162 and the dial operation sensor 55 changes based on the rotation angle of the dial 16. Furthermore, the magnetic field between the permanent magnet 162 and the dial operation sensor 55 changes based on the rotation direction of the dial 16. By detecting the changes in the magnetic field, the dial operation sensor 55 can detect both the rotation direction and the rotation angle of the dial 16.

[0158] The detection data from the dial operation sensor 55 is output to the controller 18. The controller 18 can determine the rotation direction and speed of the dial 16 based on the detection data from the dial operation sensor 55. Additionally, the detection data from the dial operation sensor 55 includes a clutch threshold in clutch mode. In clutch mode, the controller 18 sets a torque threshold based on the detection data from the dial operation sensor 55.

[0159] Manual switch 17 generates operation data through operator input. This operation data is then sent to controller 18. The operation data from manual switch 17 includes a clutch threshold in clutch mode. In clutch mode, controller 18 sets a torque threshold based on the operation data from manual switch 17.

[0160] The operating device 24 generates operating data through operation by the operator. This operating data is then sent to the controller 18. The operating data of the operating device 24 includes either a drilling mode or a clutch mode. The controller 18 sets the drilling mode or clutch mode based on the operating data of the operating device 24.

[0161] [The action of the driving drill]

[0162] Figure 9 This is a diagram illustrating an example of the use of the drive drill 1 according to the embodiment. Figure 9 The diagram shows the state in which the front-end tool 70 is assembled to the output section 8 and the drive drill 1 is used to perform screw tightening operations.

[0163] The following description illustrates an example where the drive drill 1 performs a screw tightening operation while in clutch mode. The operator can select the clutch mode by operating the operating device 24 while the mode switching ring 13 is operated with the vibration mechanism 40 set to non-vibration mode.

[0164] The clutch mode is a drive mode that stops the motor 6 when the torque acting on the motor 6 exceeds a torque threshold. When the clutch mode is selected, the operator can operate at least one of the dial 16 and the manual switch 17 to set the torque threshold.

[0165] The operating direction of dial 16 is different from that of manual switch 17. Dial 16 operates in a rotational direction centered on dial axis DX. Manual switch 17 operates in a forward / backward direction. Because the operating directions of dial 16 and manual switch 17 are different, the operator can use manual switch 17 to change the torque threshold when in situations where it is difficult to operate dial 16. Similarly, the operator can use dial 16 to change the torque threshold when in situations where it is difficult to operate manual switch 17.

[0166] The torque threshold can be set in detail. For example, controller 18 can be set with 40 levels of torque threshold.

[0167] When using dial 16 to set the torque threshold, for example, when dial 16 is rotated 45° in the forward direction, the torque threshold increases by one level. When dial 16 is rotated 45° in the reverse direction, the torque threshold decreases by one level. In this embodiment, dial 16 can rotate more than 360° in both the forward and reverse directions centered on dial axis DX. Therefore, by rotating dial 16 45° in either the forward or reverse direction, the operator can set 40 levels of torque threshold in detail.

[0168] Furthermore, the rotation angle of the dial 16 used to change the torque threshold by one level may not be 45°, may be less than 45°, or may be greater than 45°.

[0169] When using the manual switch 17 to set the torque threshold, for example, in the first operating state where the forward / reverse switch 11 has moved to the left, pressing the manual switch 17 once increases the torque threshold by one level. In the first operating state where the forward / reverse switch 11 has moved to the left, pressing the manual switch 17 any number of times increases the torque threshold by multiple levels. In the second operating state where the forward / reverse switch 11 has moved to the right, pressing the manual switch 17 once decreases the torque threshold by one level. In the second operating state where the forward / reverse switch 11 has moved to the right, pressing the manual switch 17 any number of times decreases the torque threshold by multiple levels.

[0170] The controller 18 can determine whether the forward / reverse switching lever 11 is in the first operating state or the second operating state based on the detection data from the forward / reverse operation sensor 52. Therefore, the controller 18 can raise or lower the torque threshold based on the detection data from the forward / reverse operation sensor 52 and the operation data from the manual switch 17.

[0171] Furthermore, for example, in the first operating state where the forward / reverse switching lever 11 has moved to the left, the torque threshold can be increased by two levels or any number of levels by pushing the manual switch 17 once. In the second operating state where the forward / reverse switching lever 11 has moved to the right, the torque threshold can be decreased by two levels or any number of levels by pushing the manual switch 17 once.

[0172] Furthermore, in the first operating state where the forward / reverse switching lever 11 has moved to the left, the torque threshold can be decreased by pushing the manual switch 17. In the second operating state where the forward / reverse switching lever 11 has moved to the right, the torque threshold can be increased by pushing the manual switch 17.

[0173] Furthermore, the number of torque threshold levels can be less than 40 or more than 40.

[0174] In clutch mode, the operator sets the torque threshold by operating dial 16, for example, before performing screw tightening operations.

[0175] The controller 18 displays the torque threshold set by the dial 16 on the display device 25.

[0176] After setting the torque threshold, the operator operates the trigger lever 10 to start the motor 6. The controller 18 can control the rotational speed of the motor 6 based on the amount of operation of the trigger lever 10. The controller 18 controls the motor 6 based on the detection data of the rotation detection element of the sensor circuit board 61E so that the motor 6 rotates at a target rotational speed specified based on the amount of operation of the trigger lever 10.

[0177] The controller 18 calculates the torque acting on the motor 6. The controller 18 can calculate the torque acting on the motor 6 based on the drive current value supplied to the coil 61D and the rotational speed of the rotor 62 detected by the rotational detection element of the sensor circuit board 61E.

[0178] When the torque acting on motor 6 calculated during the driving of motor 6 exceeds the set torque threshold, controller 18 stops motor 6.

[0179] like Figure 9As shown, before the screw is fully tightened into the workpiece and the motor 6 is stopped, the operator can operate the manual switch 17 to increase the torque threshold. The operator can operate the manual switch 17 using their right index finger or similar hand while maintaining the operating posture of holding the handle 22 of the drive drill 1 with their right hand. In other words, the operator can adjust the torque threshold with one hand while maintaining the operating posture of using the drive drill 1.

[0180] Furthermore, its effectiveness is particularly pronounced when the manual switch 17 is used in a vibratory drill. For example, sometimes the clutch level of the drill 1 is changed electrically via a clutch ring located at the front end of the second outer casing 4B. In this case, since it is done electrically via a ring-shaped component, it is conceivable that the ring-shaped component might break during vibratory operation. However, in this configuration, the clutch level is changed via a button such as the manual switch 17, thus reducing the risk of breakage. In particular, the vibration in a vibratory drill differs from the swinging motion during screw tightening or the impact action in an impact screwdriver; it occurs multiple times within a short cycle. When changing the clutch level electrically, a structure that prevents breakage should be adopted, and this configuration has already been studied / adopted in vibratory drills.

[0181] [Effect]

[0182] As described above, in this embodiment, the drive drill 1 includes: a motor 6; an output unit 8, which is positioned further forward than the motor 6 and rotates by the rotational force of the motor 6; a trigger lever 10, which is operated to start the motor 6; a forward / reverse switching lever 11, which is operated to switch the rotation direction of the motor 6; a dial 16, which serves as a first operating component, and is operated to change the drive conditions of the motor 6; a manual switch 17, which serves as a second operating component, and is positioned further upward than the dial 16, and is operated to change the drive conditions of the motor 6; and a controller 18, which sets the drive conditions of the motor 6 based on the operation of at least one of the dial 16 and the manual switch 17.

[0183] In the above configuration, in addition to the dial 16, a manual switch 17 is also provided. The manual switch 17 is positioned higher than the dial 16. When changing the drive conditions of the motor 6, the operator can operate the manual switch 17 while maintaining the working posture of using the drive drill 1 to smoothly change the drive conditions of the motor 6.

[0184] In this embodiment, the drive drill 1 includes a housing 2, which has a motor housing 21 for housing the motor 6, a gripping portion 22 extending downward from the motor housing 21, and a battery holding portion 23 disposed at the lower part of the gripping portion 22. A dial 16 is disposed in the battery holding portion 23, and a manual switch 17 is disposed in either the gripping portion 22 or the motor housing 21.

[0185] In the above configuration, when the driving conditions of the motor 6 are changed, the operator can operate the manual switch 17 while maintaining the working posture of using the drive drill 1 with the hand holding the handle 22, so as to smoothly change the driving conditions of the motor 6.

[0186] In this embodiment, the trigger lever 10 is positioned at the front of the grip portion 22. The manual switch 17 is positioned above the trigger lever 10.

[0187] In the above configuration, when the driving conditions of the motor 6 are changed, the operator can operate the manual switch 17 using the index finger of their right hand while maintaining the same working posture as when using the drive drill 1, for example, holding the handle 22 with their right hand. That is, the operator can change the driving conditions of the motor 6 with one hand while maintaining the same working posture as when using the drive drill 1.

[0188] In this implementation, when the torque acting on the motor 6 during its drive exceeds a torque threshold, the controller 18 stops the motor 6. The drive condition includes the torque threshold.

[0189] In the above configuration, when the drive drill 1 is set to clutch mode, the torque threshold is changed by operating the manual switch 17.

[0190] In this embodiment, the manual switch 17 includes a push-button switch. By performing a single push-button operation on the manual switch 17, the torque threshold is changed by a predetermined amount.

[0191] In the above configuration, the operator can change the torque threshold by a predetermined amount by pushing the manual switch 17, which is a push-type switch. By performing one push operation, the torque threshold is changed by, for example, one level, which is a predetermined amount.

[0192] In the implementation, the torque threshold increases when the manual switch 17 is pushed when the forward / reverse switching lever 11 is in the first operating state, and decreases when the manual switch 17 is pushed when the forward / reverse switching lever 11 is in the second operating state.

[0193] In the above configuration, the torque threshold can be raised or lowered by combining the operating state of the forward / reverse switching lever 11 with the operating state of the manual switch 17.

[0194] In this embodiment, at least a portion of the forward / reverse switching lever 11 and the manual switch 17 are configured at the same height.

[0195] In the above configuration, the operator can, for example, use one hand to operate the forward / reverse switching lever 11 and the manual switch 17.

[0196] In this implementation, the operating direction of the dial 16 is different from that of the manual switch 17.

[0197] In the above configuration, the operator can operate the easier-to-operate operating component of the dial 16 and the manual switch 17 according to the working conditions to control the drive conditions of the motor 6. In working conditions where, for example, the dial 16 is difficult to operate, the operator can use the manual switch 17 to change the torque threshold. Similarly, in working conditions where, for example, the manual switch 17 is difficult to operate, the operator can use the dial 16 to change the torque threshold.

[0198] In one embodiment, the dial 16 is capable of rotating more than 360°.

[0199] In the above configuration, since the dial 16 can rotate more than 360°, the operator can easily change the driving conditions of the motor 6.

[0200] In this embodiment, the drive drill 1 includes a display device 25. The controller 18 displays the drive conditions of the motor 6 on the display device 25.

[0201] In the above configuration, the operator can identify the driving conditions of the motor 6 by observing the display device 25.

[0202] [Other Implementation Methods]

[0203] like Figure 8 As shown, the drive drill 1 includes an acceleration sensor 56. The acceleration sensor 56 is used to detect, for example, acceleration acting on the housing 2. When the detected value of the acceleration sensor 56 exceeds an acceleration threshold, the controller 18 stops the motor 6. The drive condition includes the acceleration threshold. The acceleration threshold can be changed by operating the manual switch 17.

[0204] During screw tightening operations using the drive drill 1, sometimes excessive reaction force is applied to the drive drill 1, causing it to move significantly against the operator's force. An acceleration sensor 56 is used to detect the movement of the drive drill 1. If the controller 18 determines, based on the detection data from the acceleration sensor 56, that the acceleration acting on the drive drill 1 exceeds an acceleration threshold, it stops the motor 6.

[0205] The operator can operate the manual switch 17 and adjust the acceleration threshold according to, for example, the operating conditions.

[0206] Figure 10 This is a perspective view showing the drive drill 1B involved in the modified example, viewed from the rear. The manual switch 17B is positioned above the dial 16. Figure 10 In the example shown, the manual switch 17B is located on the rear surface of the rear cover 3.

[0207] exist Figure 10 In the example shown, even when the driving conditions of the motor 6 are changed, the operator can smoothly change the driving conditions of the motor 6 by operating the manual switch 17B while maintaining the working posture of holding the handle 22 with their hand and using the drive drill 1B. The operator can operate the manual switch 17B by using their right index finger or similar tool while maintaining, for example, the working posture of holding the handle 22 with their right hand and using the drive drill 1B.

[0208] As explained above, in Figure 10 In the example shown, the drive drill 1B, which is a vibration-driven drill, includes: a motor 6; an output unit 8, which is positioned further forward than the motor 6 and rotates by the rotational force of the motor 6; a vibration mechanism 40, which is positioned between the motor 6 and the output unit 8 and can switch between vibrating the output unit 8 in the front-to-back direction and not vibrating the output unit 8 in the front-to-back direction; a trigger lever 10, which is operated to start the motor 6; and a forward / reverse switching lever 11, which is operated by the forward / reverse switching lever. 11 is operated to switch the rotation direction of motor 6; motor housing 21 and rear cover 3 are motor housings for housing motor 6; gripping part 22 is a gripping housing that extends downward from motor housing; manual switch 17B is an operation button disposed on the rear cover 3 which is part of motor housing, and operation of the operation button is performed to change the driving conditions of motor 6; and controller 18 sets the driving conditions of motor 6 based on the operation of the operation button.

[0209] In the above configuration, a manual switch 17B, which serves as an operation button, is provided in the rear cover 3, which is part of the motor housing. When changing the driving conditions of the motor 6, the operator can smoothly change the driving conditions of the motor 6 by operating the operation button while maintaining the working posture of using the drive drill 1B.

[0210] Figure 11 This diagram illustrates the driving conditions of the motor 6 in the modified example. In the above embodiment, the driving condition of the motor 6 is a torque threshold. The driving condition of the motor 6 may include: the operation or time of the motor 6 from the time the trigger lever 10 is operated until the rotational speed of the motor 6 reaches a predetermined value. The driving condition of the motor 6 may also include: the operation or time of the motor 6 from the time the torque acting on the motor 6 exceeds the torque threshold until the motor 6 stops.

[0211] exist Figure 11 In the graph shown, the horizontal axis represents the time elapsed since the trigger lever 10 was operated, and the vertical axis represents the rotational speed of the motor 6. At time point t0, the trigger lever 10 is operated. The rotational speed of the motor 6 rises to a predetermined value based on the amount of operation of the trigger lever 10. At time point t1, the rotational speed of the motor 6 reaches the predetermined value. At time point t2, the torque acting on the motor 6 exceeds the torque threshold, and the motor 6 begins to stop. At time point t3, the motor 6 stops.

[0212] The time T1 of motor 6 from the operation of trigger lever 10 until the speed of motor 6 reaches a specified value can be changed by operating manual switch 17 (17B). The time T2 of motor 6 from the point where the torque applied to motor 6 exceeds the torque threshold until motor 6 stops can also be changed by operating manual switch 17 (17B). Time T1 is the time from time point t0 to time point t1. Time T2 is the time from time point t2 to time point t3.

[0213] Additionally, the operation of motor 6 from the moment trigger lever 10 is operated until the speed of motor 6 reaches a predetermined value can be changed by operating manual switch 17 (17B). The operation of motor 6 from the moment the torque applied to motor 6 exceeds a torque threshold until motor 6 stops can also be changed by operating manual switch 17 (17B). That is, the operation of motor 6 within time T1 and the operation of motor 6 within time T2 can be changed. An example of the operation of motor 6 within time T1 is the rate of increase in the speed of motor 6. An example of the operation of motor 6 within time T2 is the rate of decrease in the speed of motor 6.

[0214] In the above configuration, the operator can operate the manual switch 17 (17B) and adjust the driving conditions of the motor 6 according to, for example, the operator's preference.

[0215] In the above embodiment, a battery pack 20, which is installed in the battery assembly 5 as the power source for the drive drill 1 (1B), is used. Alternatively, a commercial power source (AC power) can be used as the power source for the drive drill 1 (1B).

Claims

1. A drive drill, characterized in that, The drive drill has: motor; An output section is positioned further forward than the motor and is rotated by the rotational force of the motor. A trigger lever is operated to start the motor; A forward / reverse switching lever is operated to switch the rotation direction of the motor. The first operating component is operated to change the driving conditions of the motor; A second operating component is positioned above the first operating component, and the second operating component is operated to change the driving conditions of the motor. as well as A controller that sets the drive conditions of the motor based on the operation of at least one of the first operating component and the second operating component. When the torque applied to the motor during its operation exceeds a torque threshold, the controller stops the motor. The driving conditions include the torque threshold. The second operating component includes: a push-button switch. By performing a single push operation on the push-type switch, the torque threshold is changed by a predetermined amount. When the forward / reverse switching lever is in the first operating state, the push-type switch is pressed, causing the torque threshold to rise. The torque threshold decreases when the push-type switch is pushed while the forward / reverse switching lever is in the second operating state.

2. The drive drill according to claim 1, characterized in that, The drive drill has a housing, which includes: a motor housing for housing the motor, a gripping portion extending downward from the motor housing, and a battery holding portion disposed at the lower part of the gripping portion. The first operating component is disposed in the battery holding section. The second operating component is disposed in either the gripping part or the motor housing part.

3. The drive drill according to claim 2, characterized in that, The trigger lever is located at the front of the gripping part. The second operating component is positioned above the trigger lever.

4. The drive drill according to claim 1, characterized in that, The driving conditions include: the operation or time of the motor from the moment the torque exceeds the torque threshold until the motor stops.

5. The drive drill according to claim 1, characterized in that, The forward / reverse switching lever and at least a portion of the push-button switch are configured at the same height.

6. The drive drill according to any one of claims 1 to 5, characterized in that, The operating direction of the first operating component is different from that of the second operating component.

7. The drive drill according to any one of claims 1 to 5, characterized in that, The first operating component includes a dial capable of rotating more than 360°.

8. The drive drill according to any one of claims 1 to 5, characterized in that, The drive drill is equipped with a display device. The controller displays the driving conditions of the motor on the display device.

9. The drive drill according to any one of claims 1 to 5, characterized in that, The driving conditions include: the motor's action or time from the moment the trigger lever is operated until the motor's rotational speed reaches a predetermined value.

10. The drive drill according to any one of claims 1 to 5, characterized in that, The drive drill is equipped with an acceleration sensor. When the acceleration sensor detects a value exceeding an acceleration threshold, the controller stops the motor. The driving conditions include the acceleration threshold.

11. The drive drill according to claim 1, characterized in that, The drive drill also features: A vibration unit is disposed between the motor and the output unit, which can switch between a situation in which the output unit vibrates in the front-to-back direction and a situation in which the output unit does not vibrate in the front-to-back direction; A motor housing for housing the motor; as well as A holding housing that extends downward from the motor housing. The second operating component is disposed in the motor housing.

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