WO2015011955A1 - 往復動電動工具 - Google Patents
往復動電動工具 Download PDFInfo
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- WO2015011955A1 WO2015011955A1 PCT/JP2014/059527 JP2014059527W WO2015011955A1 WO 2015011955 A1 WO2015011955 A1 WO 2015011955A1 JP 2014059527 W JP2014059527 W JP 2014059527W WO 2015011955 A1 WO2015011955 A1 WO 2015011955A1
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- motor
- speed
- power tool
- reciprocating power
- reciprocating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D59/00—Accessories specially designed for sawing machines or sawing devices
- B23D59/001—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
- B23D49/10—Hand-held or hand-operated sawing devices with straight saw blades
- B23D49/16—Hand-held or hand-operated sawing devices with straight saw blades actuated by electric or magnetic power or prime movers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
- B23D49/10—Hand-held or hand-operated sawing devices with straight saw blades
- B23D49/16—Hand-held or hand-operated sawing devices with straight saw blades actuated by electric or magnetic power or prime movers
- B23D49/162—Pad sawing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
- B23D51/16—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of drives or feed mechanisms for straight tools, e.g. saw blades, or bows
Definitions
- the present invention relates to a reciprocating electric tool that processes a workpiece by reciprocating a tip tool such as a saw blade.
- the vibration of the reciprocating power tool can be suppressed and the noise and radio noise generated by the reciprocating power tool can be reduced by reducing the rotational speed of the motor during no-load operation. Can do.
- the rotational speed of the motor is set to a constant processing speed or Then, the speed is increased to a command speed corresponding to the pulling amount of the trigger switch operated by the user.
- One aspect of the present invention is that when a tip tool such as a blade is applied to a workpiece to start machining, the tip tool can start machining without sliding on the surface of the workpiece, and the machining is started. After that, it is desirable to be able to provide a reciprocating power tool that can complete machining promptly.
- the reciprocating electric power tool includes a mounting portion for mounting a tip tool.
- a motor is connected to the mounting portion via a power transmission portion, and the mounting portion reciprocates as the motor rotates to reciprocate the tip tool.
- the motor is operated by the control unit.
- the control unit operates the motor at the first speed when activated in response to an external command, and operates the motor at the second speed higher than the first speed when the first condition is satisfied after activation. Further, after the first condition is satisfied, when the second condition is satisfied, the motor is operated at a third speed higher than the second speed.
- the control unit determines the rotation speed of the motor according to a predetermined drive condition (first condition, second condition).
- first condition second condition
- the first speed, the second speed, and the third speed are increased in stages in three stages (or more stages).
- the workpiece can be processed more efficiently than the conventional apparatus that switches the rotational speed of the motor to two stages of no load and normal time after startup.
- the time required for processing the workpiece can be shortened.
- the motor is driven at the lowest first speed during no-load operation from when the control unit is activated and the motor starts to be driven until the tip tool comes into contact with the workpiece and starts machining.
- the motor is driven at a second speed lower than the rotation speed during normal machining, so that the tip tool is orthogonal to the reciprocating direction.
- the conditions (first condition and second condition) when the control unit switches the rotation speed of the motor are state quantities (in detail, the first threshold value) that are detected by the load state detection unit and indicate the load state of the motor. , The second threshold).
- the rotational speed of the motor can be controlled according to the machining state of the workpiece by the tip tool by switching the rotational speed of the motor stepwise according to the load applied to the motor.
- the controls (1) to (3) can be automatically executed.
- the conditions (first condition, second condition) when the controller switches the rotation speed of the motor may be set according to the motor driving time (specifically, the first time, the second time).
- the load state detection unit need not detect the load state, the apparatus configuration is simplified and the cost can be reduced.
- the time required for the controls (1) and (2) is considered to be substantially constant. Therefore, if the first time and the second time are appropriately set, The workability at the time of processing the workpiece can be improved.
- the reciprocating electric tool described above may include a speed setting unit for setting the rotational speed of the motor. And a control part may restrict
- the user can use the reciprocating electric tool safely.
- the state quantity indicating the load state of the motor decreases to a third threshold value that is the same as the first threshold value or lower than the first threshold value while operating the motor at the third speed, You may drive at 1 speed.
- the motor continues to be driven without decreasing the motor speed until the state quantity decreases to the third threshold value.
- the rotational speed of the motor drops from the third speed to the second speed, and the workpiece On the other hand, it can suppress that the process which the user does not assume is made.
- the control unit continues to operate the motor until a motor operation stop command is input.
- the motor operation stop command is input, May be stopped.
- the blade which is a tip tool
- the blade may be once separated from the workpiece and the angle of the blade with respect to the workpiece may be changed.
- the motor is in a no-load state.
- the state quantity indicating the load state of the motor is the same as the second threshold value or a fourth value between the second threshold value and the third threshold value.
- the motor may be operated at the second speed.
- control unit operates the motor at the second speed
- state quantity indicating the load state of the motor decreases to the third threshold value that is the same as the first threshold value or lower than the first threshold value, May be operated at the first speed.
- the reciprocating electric power tool configured in this way, it is possible to suppress a rapid decrease in the rotational speed of the motor. For example, the vibration of the tip tool that occurs when processing a workpiece repeatedly is performed. Suppressing and improving workability.
- the control unit may operate the motor at the first speed when the elapsed time when the motor is operated at the third speed reaches a preset time. In this case, when processing a workpiece in which the time required for the control in (3) is substantially constant, the rotation speed of the motor is reduced without detecting the load state of the motor. Processing can be completed, and workability when processing a workpiece can be improved.
- the device configuration can be simplified, and the cost can be reduced.
- the above-described reciprocating power tool allows control parameters (first condition, second condition, first speed, second speed, third speed, etc.) used by the control unit to control the operation of the motor from the outside.
- a control parameter setting unit for setting may be provided.
- control operation of the motor by the control unit can be appropriately set by the user so as to achieve a desired control operation, and the usability for the user can be improved.
- the control unit is configured to be operable in a normal mode in which the motor is operated at a predetermined rotational speed in accordance with an external command, in addition to the control mode for switching the rotational speed of the motor according to the first condition or the second condition described above. May be.
- the reciprocating power tool may include an operation setting unit for setting the operation mode of the control unit to either the control mode or the normal mode. Accordingly, if the user sets the operation mode of the control unit to the normal mode via the operation setting unit, the user can drive the motor at a desired rotation speed according to, for example, the pulling amount of the trigger switch. It is possible to inhibit the rotational speed of the motor from being automatically adjusted by the operation of the control unit. Therefore, the above-described reciprocating power tool can be a user-friendly power tool for the user.
- the above-described reciprocating electric power tool may include a trigger switch, and the trigger switch is configured to instruct the operation of the motor to the control unit and to instruct the rotation speed of the motor by the pulling amount of the trigger switch. May be.
- the trigger switch may have a lock-on function that holds the pull amount of the trigger switch at the maximum pull amount.
- the rotation speed of the motor can be switched in steps from the first speed, the second speed, the third speed, etc. Fine adjustment can be eliminated.
- the trigger switch is equipped with a lock-on function that holds the maximum pulling amount, the workpiece can be processed efficiently, and the workpiece can be processed. Can be performed efficiently.
- the load state detection unit may calculate a state quantity representing the load state of the motor using at least one of the motor current, the rotation speed, and the torque.
- a reciprocating electric power tool is provided with one or more sensors for monitoring a motor current, a rotational speed, a torque, and the like. Therefore, by calculating a state quantity representing a load state from at least one of the operation quantities obtained from these sensors, it is possible to reduce costs and reduce the circuit size without adding a sensor.
- FIG. 6A and 6B are explanatory diagrams for explaining the movement of the blade when cutting the metal pipe, in which FIG. 6A shows the movement of the blade in the first mode, and FIG. 6B shows the movement in the second mode. It is explanatory drawing showing the modification of an operation
- the present embodiment is an application of the present invention to a reciprocating saw 2, and has a long shape in which a grip portion 3 is formed on one end (left side of FIG. 1) for a user to grip.
- the grip portion 3 of the tool body 4 is provided with a trigger switch 16 for inputting a drive command for the reciprocating saw 2 while the user grips the grip portion 3. Further, a blade folder 8 for mounting a blade 9 as a tip tool is provided at an end portion (right side in FIG. 1) opposite to the grip portion 3 of the tool body 4.
- the power transmission for converting the rotation of the motor 10 and the motor 10 into the reciprocating motion and transmitting it to the blade folder 8 is performed.
- a drive circuit 14 that receives power from the unit 12 and the battery 6 and energizes the motor 10 is provided.
- a monitor circuit 18, a controller 20, and an operation setting are provided as control system parts for controlling the rotation speed of the motor 10 (and hence the reciprocating speed of the blade 9) via the drive circuit 14.
- a portion 22 is provided.
- the monitor circuit 18 uses the current i flowing through the motor 10 and the voltage V applied to the motor 10 as a state quantity representing the load state of the motor 10, and the torque ⁇ acting on the motor 10 and the rotational speed of the motor 10. ⁇ is estimated.
- the voltage V applied to the motor 10 and the torque ⁇ are input using the two-input two-output motor model M that inputs the voltage V and the torque ⁇ and outputs the rotational speed ⁇ and the current i. Based on the estimated value ⁇ e, the rotational speed ⁇ and the current i are estimated.
- the torque ⁇ and the rotational speed ⁇ of the motor 10 can be estimated based on the current i and the voltage V of the motor 10.
- This estimation procedure was previously filed by the applicant of the present application (application number: Japanese Patent Application No. 2011-027787), and is described in detail in its International Publication (WO 20121/108246 A1).
- WO 20121/108246 A1 is incorporated herein by reference, and further description of the estimation procedure is omitted.
- the controller 20 is for controlling the motor 10 via the drive circuit 14 in accordance with a drive command input by the user operating the trigger switch 16, and includes a microcomputer including a CPU, a ROM, a RAM, and the like. It has.
- the controller 20 sets the rotation speed ⁇ of the motor 10 to the normal mode in which the rotation speed ⁇ of the motor 10 is controlled according to the pulling amount of the trigger switch 16. It operates in a control mode (first mode or second mode) controlled in stages or three stages.
- the operation setting unit 22 is used by the user to set the operation mode of the reciprocating saw 2 to any one of the normal mode, the first mode, and the second mode.
- the operation unit 24 is configured by a changeover switch that can switch the position of the operation unit 24 in three stages.
- the controller 20 operates according to the operation mode set by the user via the operation setting unit 22, and when the control mode is set as the operation mode, the torque ⁇ and the rotational speed ⁇ estimated by the monitor circuit 18 are set. Based on the above, the actual rotational speed of the motor 10 is controlled.
- the first mode is a mode suitable for cutting wood with the reciprocating saw 2
- the second mode is a mode suitable for cutting a metal material with the reciprocating saw 2.
- the controller 20 determines that the motor 10 is in the no-load state until the torque ⁇ applied to the motor 10 reaches the threshold value ⁇ 01 as shown in FIG. Then, control is performed so that the rotational speed ⁇ of the motor 10 becomes the target speed ⁇ 01 in the no-load mode.
- the controller 20 When the second mode is set as the operation mode, the controller 20 is in a no-load state until the torque ⁇ applied to the motor 10 reaches the first threshold value ⁇ 1, as shown in FIG. Therefore, control is performed so that the rotational speed ⁇ of the motor 10 becomes the target speed (first speed) ⁇ 1 in the no-load mode for the metal material.
- the rotational speed ⁇ of the motor 10 is Is controlled so as to be the target speed (third speed ⁇ 3) in the load mode 2 that cuts off.
- the rotation speed ⁇ of the motor 10 is controlled to be the first speed ⁇ 1.
- the controller 20 sets the rotation speed ⁇ of the motor 10 to the rotation speed set according to the pulling amount of the trigger switch 16 in the normal mode.
- An upper limit of the rotational speed ⁇ of the motor 10 is set so that exceeding is suppressed or prevented.
- the rotational speed ⁇ of the motor is set to 0 (see FIGS. 3 and 4).
- control parameters specifically, when controlling the rotational speed ⁇ of the motor 10 in the second mode.
- S110 it is determined whether or not the trigger switch 16 is turned on to wait for the user to operate the trigger switch 16.
- the process proceeds to S120, where the target speed of the motor 10 is set to the first speed ⁇ 1, thereby setting the load mode when driving the motor to the no-load mode.
- the controller 20 sets the control amount of the motor 10 so that the rotational speed ⁇ of the motor 10 estimated by the monitor circuit 18 becomes the first speed ⁇ 1. Then, driving of the motor 10 by the driving circuit 14 is started.
- the torque ⁇ of the motor 10 is read from the monitor circuit 18, and it is determined whether or not the torque ⁇ of the motor 10 exceeds the second threshold value ⁇ 2. If the torque ⁇ of the motor 10 does not exceed the second threshold value ⁇ 2, the process proceeds to S150, the mode 2 time counter C2 is cleared, and in the subsequent S160, the torque ⁇ of the motor 10 is read from the monitor circuit 18, It is determined whether the value exceeds the first threshold value ⁇ 1.
- the mode 1 hour counter C1 is cleared, and in subsequent S200, the load mode 1 is set as the load mode at the time of driving the motor, and then the process proceeds to S130.
- the controller 20 changes the control amount of the motor 10 so that the rotational speed ⁇ of the motor 10 estimated by the monitor circuit 18 becomes the second speed ⁇ 2.
- the driving speed of the motor 10 by the driving circuit 14 is switched to the second speed ⁇ 2.
- the mode 1 hour counter C1 confirms that the torque ⁇ exceeds the first threshold value ⁇ 1 for a predetermined time or more determined by the count value CT1. Therefore, it functions as a so-called low-pass filter for noise removal.
- the target speed when driving the motor 10 can be set to the second speed ⁇ 2.
- the mode 2 time counter C2 is cleared, and in subsequent S240, the load mode 2 is set as the load mode at the time of driving the motor, and then the process proceeds to S130.
- the controller 20 changes the control amount of the motor 10 so that the rotational speed ⁇ of the motor 10 estimated by the monitor circuit 18 becomes the third speed ⁇ 3.
- the driving speed of the motor 10 by the driving circuit 14 is switched to the third speed ⁇ 3.
- the mode 2 hour counter C2 confirms that the torque ⁇ exceeds the second threshold value ⁇ 2 for a certain time or more determined by the count value CT2 when the load mode at the time of driving the motor is changed to the load mode 2. Therefore, it functions as a so-called low-pass filter for noise removal.
- the target speed when driving the motor 10 can be set to the third speed ⁇ 3.
- S290 it is determined whether or not the value of the no-load time counter C0 added in S280 is equal to or greater than a preset count value CT0. If it is determined in S290 that the no-load time counter C0 is not equal to or greater than the count value CT0, the process proceeds to S130, and in S290, the no-load time counter C0 is equal to or greater than the count value CT0. If it is determined that there is, the process proceeds to S300.
- the no-load time counter C0 is cleared, and in subsequent S310, the no-load mode is set as the load mode when the motor is driven, and then the process proceeds to S130.
- the controller 20 changes the control amount of the motor 10 so that the rotational speed ⁇ of the motor 10 estimated by the monitor circuit 18 becomes the first speed ⁇ 1.
- the driving speed of the motor 10 by the driving circuit 14 is switched to the first speed ⁇ 1.
- the no-load time counter C0 When the load mode at the time of driving the motor is changed from the load mode 2 to the no load mode, the no-load time counter C0 has a torque ⁇ that is equal to or less than a third threshold value ⁇ 3 for a certain time or more determined by the count value CT0. This is for confirming this, and functions as a so-called low-pass filter for noise removal.
- the target speed when driving the motor 10 can be changed from the third speed ⁇ 3 to the first speed ⁇ 1.
- the drive control of the motor 10 is performed according to the operation mode set via the operation setting unit 22. Executed.
- the motor 10 When the operation mode is set to the normal mode, the motor 10 is driven at a rotation speed corresponding to the pulling amount (operation amount) of the trigger switch 16. For this reason, the user can rotate the motor 10 according to the operation amount at the time of operating the trigger switch 16 by setting the operation mode of the reciprocating saw 2 to the normal mode.
- the rotation of the motor 10 is performed at 2 of the target speeds ⁇ 01 and ⁇ 02 based on the state quantity indicating the load state of the motor 10 (torque ⁇ in this embodiment). It is controlled step by step.
- the motor 10 when no load is applied when the blade 9 is not in contact with the workpiece, the motor 10 is driven at a low speed so that the blade 9 is in contact with the workpiece.
- the motor 10 can be driven at a high speed.
- the first mode is suitable for processing wood, in which the rotation speed ⁇ of the motor 10 is switched between the low speed and the high speed, so that the blade 9 does not slip at the start of processing.
- the motor 10 when the motor 10 is controlled in the first mode when the iron pipe 100 is cut, when the blade 9 comes into contact with the iron pipe 100 and the torque ⁇ of the motor 10 increases,
- the rotational speed ⁇ of the motor 10 is switched to a high speed, the blade 9 vibrates in a direction perpendicular to the plate surface of the blade 9 and slides on the surface of the iron pipe 100. As a result, the iron pipe 100 cannot be cut efficiently.
- the reciprocating saw 2 of the present embodiment can set the second mode as the operation mode separately from the normal mode and the first mode described above.
- the rotation of the motor 10 is performed at the first speed ⁇ 1, the second speed ⁇ 2, and the third speed ⁇ 3 based on the state quantity (the torque ⁇ in this embodiment) that represents the load state of the motor 10. It is controlled step by step in three steps.
- the rotational speed ⁇ of the motor 10 is suitable for cutting the iron pipe 100 so that the blade 9 is suppressed or prevented from sliding on the surface of the iron pipe 100.
- the second speed ⁇ 2 can be controlled.
- the rotational speed ⁇ of the motor 10 is controlled to a third speed ⁇ 3 suitable for cutting the iron pipe 100, and required for cutting the iron pipe 100. The working efficiency when cutting the iron pipe 100 can be increased by shortening the time.
- the user does not need to manually adjust the rotation speed ⁇ of the motor 10 according to the processing state of the metal material such as the iron pipe 100, so that the workability when cutting the metal material is improved. it can.
- the trigger switch 16 not only inputs a drive command for the reciprocating saw 2 (and thus the motor 10), but also according to the pulling amount thereof, the motor rotational speed ⁇ in the normal mode, and The upper limit speed of the motor 10 in the control mode (in the first mode or the second mode) can be set.
- the motor 10 is suppressed or prevented from being driven beyond the rotational speed ⁇ designated by the user via the trigger switch 16. 2 can be used safely.
- the motor 10 when the motor 10 is driven at the third speed ⁇ 3 and the torque ⁇ representing the load state of the motor 10 decreases to the third threshold ⁇ 3 lower than the first threshold ⁇ 1, the motor is Drive at the first speed ⁇ 1.
- the rotational speed ⁇ of the motor 10 changes from the third speed ⁇ 3 to the second speed ⁇ 2. It can suppress falling and the formation of the level
- the rotation speed ⁇ of the motor 10 can be maintained at the third speed ⁇ 3, so that the processing intended by the user is performed on the metal material. It becomes easy to do.
- the rotational speed of the motor 10 is processed by the processing of S260 to S310. ⁇ decreases to the first speed ⁇ 1.
- the blade folder 8 corresponds to an example of the mounting unit of the present invention
- the controller 20 corresponds to an example of the control unit of the present invention
- the monitor circuit 18 corresponds to the load state of the present invention.
- the trigger switch 16 corresponds to an example of a detection unit
- the trigger switch 16 corresponds to an example of a speed setting unit of the present invention.
- the present invention is not limited to the above-described embodiment, and can take various forms without departing from the gist of the present invention. Can do. (Modification 1)
- the operation setting unit 22 can switch the position of the operation unit 24 in three stages so that the operation mode of the reciprocating saw 2 can be set to any one of the normal mode, the first mode, and the second mode. The description has been made assuming that the switch is constituted by a changeover switch.
- the operation setting unit 22 is configured by a rotary switch as illustrated in FIG. 7, and the first mode N1 and the second mode N2 (not shown) can be selected as the control mode depending on the rotational position.
- a normal mode a plurality of modes (normal mode 1, normal mode 2, normal mode 3...) Having different target speeds of the motor 10 may be selected.
- the target speed corresponding to the selected normal mode is obtained.
- the motor 10 may be driven.
- Mode 2 In the above embodiment, when the operation mode of the reciprocating saw 2 is set to the control mode of the first mode or the second mode, the preset target speeds ⁇ 01 and ⁇ 02, or the first speed ⁇ 1 and the second speed are set. It has been described that the rotational speed ⁇ of the motor 10 is switched stepwise at ⁇ 2 and the third speed ⁇ 3.
- control parameter setting unit 30 illustrated in FIG. 8 may be provided so that the setting can be made.
- control parameter setting unit 30 shown in FIG. 8 can select the type of control parameter to be set and the value of the selected control parameter from a maximum of 10 types with a numerical value of 0 to 9. , A seven-segment numerical value display section 32 and two operation buttons 34 for changing and confirming the numerical value.
- control parameter setting unit 30 may be anything that allows the user to input control parameters.
- Modification 3 Next, in the above embodiment, when the operation mode of the reciprocating saw 2 is in the second mode, once the rotational speed ⁇ of the motor 10 is increased to the third speed ⁇ 3 in the load mode 2, the torque ⁇ is then increased. The load mode 2 is maintained until the third threshold value ⁇ 3 is lowered, and the rotation speed ⁇ of the motor 10 is returned to the first speed ⁇ 1 in the no-load mode when the torque ⁇ becomes equal to or less than the third threshold value ⁇ 3. .
- the torque ⁇ is a fourth value between the second threshold value ⁇ 2 and the first threshold value ⁇ 1.
- the rotation speed ⁇ of the motor 10 is returned to the second speed ⁇ 2 of the load mode 1 when the threshold value ⁇ 4 or less is reached, and then the torque ⁇ is further lower than the fifth threshold value ⁇ 5 that is lower than the first threshold value ⁇ 1.
- the rotational speed ⁇ of the motor 10 may be returned to the first speed ⁇ 1 in the no-load mode.
- This control should be applied to jigsaws. That is, when drawing a curve on a metal plate with a jigsaw, the blade may be once separated from the metal plate to change the angle of the blade with respect to the metal plate. At this time, the motor is in an unloaded state. In this case, if the rotational speed ⁇ of the motor is reduced to the first speed ⁇ 1 every time the motor is in a no-load state, workability for the user is significantly reduced.
- the torque ⁇ of the motor 10 is set to the first threshold value ⁇ 1 as illustrated in FIG. Every time the third threshold value ⁇ 3 is exceeded, the rotational speed ⁇ of the motor 10 is increased stepwise from the first speed ⁇ 1 to the second speed ⁇ 2, the third speed ⁇ 3, and the fourth speed ⁇ 4. It may be.
- the rotational speed ⁇ of the motor 10 can be switched more finely according to the processing state of the workpiece, and the processing accuracy of the workpiece can be improved. it can.
- the method of reducing the rotational speed ⁇ of the motor 10 after increasing the rotational speed ⁇ of the motor 10 to the fourth speed ⁇ 4 of the load mode 3 may be the same as in the above embodiment. Or you may make it the same as that of the modification 3, 4.
- the number of changing steps may be three or more in the above-described embodiment, or four in the fifth modification. It may be the number of stages.
- the torque ⁇ of the motor 10 estimated via the monitor circuit 18 is used as a condition for switching the rotational speed ⁇ of the motor 10, and the torque ⁇ is the first condition. It has been described that the rotational speed ⁇ of the motor 10 is increased stepwise when the first threshold value ⁇ 1 is exceeded and when the second threshold value ⁇ 2 that is the second condition is exceeded.
- the drive time from the start of driving of the motor 10 (first time t1, second time t2 shown in FIG. 12).
- the third time t3) may be set.
- the apparatus configuration can be simplified and the cost can be reduced as compared with the above embodiment.
- a state quantity indicating the load state of the motor 10 is used as a condition used for switching the rotational speed ⁇ of the motor 10, it is necessary to always use the torque ⁇ of the motor 10 as the state quantity as in the above embodiment. Instead, the current flowing through the motor 10, the rotational speed of the motor 10, or a combination of these may be used as the state quantity.
- the torque ⁇ and the rotational speed ⁇ of the motor 10 are estimated based on the current and voltage of the motor 10 using the monitor circuit 18, and this is used for driving control of the motor 10.
- the torque ⁇ and the rotational speed ⁇ of the motor 10 may be directly detected using a torque sensor and a rotation sensor.
- a parameter different from the state quantity indicating the load state of the motor 10 and the elapsed time after starting the driving of the motor 10 may be used or used.
- the rotational speed ⁇ of the motor 10 may be switched stepwise in accordance with a speed change command input by a person operating the operation switch.
- the present invention has been described as being applicable to a reciprocating saw or a jigsaw.
- the present invention is an electric tool that processes a workpiece by reciprocating a tip tool. If there is, it can be applied in the same manner as in the above embodiment.
- the threshold value when the rotational speed ⁇ of the motor 2 is decreased (in other words, the condition for switching the rotational speed) is different from the threshold value when the rotational speed ⁇ of the motor 2 is increased.
- it may be set to the same value as the threshold when the rotational speed ⁇ of the motor 2 is increased.
- the first threshold value ⁇ 1 and the third threshold value ⁇ 3 may be set to the same value.
- the trigger switch 16 may be equipped with the lock-on mechanism 17 (see FIG. 1) that holds the trigger switch 16 with the maximum pulling amount.
- the rotation speed of the motor 10 can be switched to a plurality of stages from the rotation speed at the time of no load, so that fine adjustment of the speed by the trigger switch 16 is unnecessary.
- the trigger switch 16 even if the trigger switch 16 is held at the maximum pulling amount by the function (lock-on function) of the lock-on mechanism 17 provided in the trigger switch 16, the workpiece can be efficiently removed. It becomes possible to process, and the work required for processing the workpiece can be performed efficiently.
Abstract
Description
つまり、上記往復動電動工具では、ブレードを往復動させることから、モータの回転速度が上昇すると、ブレードが、往復動する軸に対し直交する方向(詳しくはブレードの板面に直交する方向)に振動してしまう。
(1)制御部が起動し、モータの駆動を開始してから、先端工具が被加工物へ当接されて加工を開始するまでの無負荷運転時には、最も低速の第1速度でモータを駆動することで、無負荷運転時の消費電力を抑制し、
(2)先端工具による被加工物への加工を開始する際には、モータを通常加工時の回転速度よりも低い第2速度で駆動することで、先端工具に、その往復動方向とは直交する方向に振動が発生するのを抑制しつつ(つまり、先端工具が被加工物の表面で滑るのを抑制しつつ)、先端工具を往復動させて、被加工物に切り込みを形成させ、
(3)被加工物に切り込みが形成されて、使用者が被加工物の加工のために先端工具を被加工物へ押し当て、モータの負荷が更に上昇した際には、モータを通常加工時の回転速度で駆動することで、被加工物の加工を短時間で実施させる、
といったことができるようになる。
また、制御部がモータの回転速度を切り換える際の条件(第1条件、第2条件)は、モータの駆動時間(詳しくは、第1時間、第2時間)により設定されてもよい。
また、特定の被加工物を加工するに当たって、上記(1)、(2)の制御に要する時間は、略一定であると考えられることから、第1時間及び第2時間を適正に設定すれば、被加工物を加工する際の作業性を向上することができる。
制御部は、モータを第3速度で運転しているときに、モータの負荷状態を表す状態量が、第1閾値と同じ若しくは第1閾値よりも低い、第3閾値まで低下すると、モータを第1速度で運転してもよい。
この結果、被加工物の加工時に使用者が不意に力を抜いて、状態量が第2閾値まで低下した際に、モータの回転速度が第3速度から第2速度に落ちて、被加工物に対し、使用者が想定していない加工がなされるのを抑制できる。
また、制御部は、モータを第3速度で運転しているときは、モータの運転停止指令が入力されるまでモータの運転を継続し、モータの運転停止指令が入力されると、モータの運転を停止してもよい。
そこで、上述の往復動電動工具においては、モータの回転速度が被加工物の加工速度である第3速度に達すると、モータの運転停止指令が入力されるまで、モータの回転速度を第3速度に維持することで、被加工物の加工時の作業性が低下するのを抑制するのである。
この場合、上記(3)の制御に要する時間が略一定となる被加工物を加工する際には、モータの負荷状態を検出することなく、モータの回転速度を低下させて、被加工物の加工を完了することができるようになり、被加工物を加工する際の作業性を向上できる。
また、上述の往復動電動工具は、制御部がモータの運転を制御するのに用いる制御パラメータ(第1条件、第2条件、第1速度、第2速度、第3速度等)を、外部から設定するための制御パラメータ設定部を備えてもよい。
また、制御部は、上述した第1条件若しくは第2条件に従いモータの回転速度を切り換える制御モードとは別に、外部からの指令に従いモータを所定の回転速度で運転する通常モードでも動作可能に構成されてもよい。
従って、使用者は、動作設定部を介して、制御部の動作モードを、通常モードに設定すれば、モータを、例えば、トリガスイッチの引き量等に応じて、所望回転速度で駆動させることができ、モータの回転速度が制御部の動作によって自動調整されるのを禁止させることができる。よって、上述の往復動電動工具は、使用者にとって、より使い勝手のよい電動工具となり得る。
図1に示すように、本実施形態は、本発明をレシプロソー2に適用したものであり、一端(図1の左方)に使用者が把持するための把持部3が形成された長尺形状の工具本体4と、工具本体4の把持部3下方に着脱自在に装着されたバッテリ6とを備える。
また、工具本体4の把持部3とは反対側端部(図1の右方)には、先端工具としてのブレード9を装着するためのブレードフォルダ8が設けられている。
なお、この推定手順については、本願出願人が先に出願(出願番号:特願2011-027787号)しており、その国際公開公報(WO 20121/108246 A1 )に詳細に説明されている。ここでは、WO 20121/108246 A1を参照によってここに援用し、推定手順のこれ以上の説明は省略する。
また、動作モードが何れのモードにあっても、使用者によるトリガスイッチ16の引き量が大きくなって、モータ10の駆動を開始する際には、モータ10の目標速度として、トリガスイッチ16の引き量に応じて設定される制御速度、若しくは、無負荷モードでの第1速度ω1を設定するのではなく、モータ10の目標速度を、制御速度若しくは第1速度ω1まで徐々に増加させる(図3、図4参照)。
そして、モータ10のトルクτは第2閾値τ2を越えていなければ、S150に移行して、モード2時間カウンタC2をクリアし、続くS160にて、モニタ回路18からモータ10のトルクτを読み込み、その値は第1閾値τ1を越えているか否かを判断する。
S180では、S170にて加算されるモード1時間カウンタC1の値が、予め設定されたカウント値CT1以上になったか否かを判断する。
なお、S200にて負荷モード1が設定されると、コントローラ20は、モニタ回路18にて推定されるモータ10の回転速度ωが第2速度ω2となるように、モータ10の制御量を変更し、駆動回路14によるモータ10の駆動速度を第2速度ω2に切り換える。
S220では、S210にて加算されるモード2時間カウンタC2の値が、予め設定されたカウント値CT2以上になったか否かを判断する。
なお、S240にて負荷モード2が設定されると、コントローラ20は、モニタ回路18にて推定されるモータ10の回転速度ωが第3速度ω3となるように、モータ10の制御量を変更し、駆動回路14によるモータ10の駆動速度を第3速度ω3に切り換える。
そして、続くS260では、モニタ回路18からモータ10のトルクτを読み込み、その値は第3閾値τ3以下であるか否かを判断する。
また、S260にて、モータ10のトルクτは、第3閾値τ3以下であると判断されると、S280に移行して、無負荷時間カウンタC0を加算し、S290に移行する。
そして、S290にて、無負荷時間カウンタC0は、カウント値CT0以上になっていないと判断されると、S130に移行し、S290にて、無負荷時間カウンタC0は、カウント値CT0以上になっていると判断されると、S300に移行する。
なお、S310にて無負荷モードが設定されると、コントローラ20は、モニタ回路18にて推定されるモータ10の回転速度ωが第1速度ω1となるように、モータ10の制御量を変更し、駆動回路14によるモータ10の駆動速度を第1速度ω1に切り換える。
しかし、図6Aに例示するように、鉄パイプ100を切断する場合に、モータ10を第1モードで制御すると、ブレード9を鉄パイプ100に当接してモータ10のトルクτが上昇した際に、モータ10の回転速度ωが高速に切り換えられて、ブレード9が、当該ブレード9の板面とは直交する方向に振動し、鉄パイプ100の表面を滑るようになる。この結果、鉄パイプ100を効率よく切断することができなくなる。
そして、第2モードでは、モータ10の負荷状態を表す状態量(本実施形態ではトルクτ)に基づき、モータ10の回転が、第1速度ω1、第2速度ω2、及び、第3速度ω3の3段階で段階的に制御される。
(1)トリガスイッチ16が操作されてからブレード9が鉄パイプ100に当接されて、モータ10のトルクτが第1閾値τ1を越えるまでの無負荷時には、モータ10の回転速度ωを第1速度ω1に制御することで、モータ10の振動を抑えて、騒音やラジオノイズの発生を抑制すると共に、モータ10の駆動によって生じる消費電力を低減することができる。
(2)ブレード9が鉄パイプ100に当接されてから、鉄パイプ100に切り込みが入り、使用者が鉄パイプ100の切断のためにブレード9を鉄パイプ100に押し当て、モータ10のトルクτが第2閾値τ2を越えるまでの間は、ブレード9が鉄パイプ100の表面で滑ることが抑制もしくは防止されるように、モータ10の回転速度ωを、鉄パイプ100に切り込みを入れるのに適した第2速度ω2に制御することができる。
(3)モータ10のトルクτが第2閾値τ2を越えると、モータ10の回転速度ωを、鉄パイプ100を切断するのに適した第3速度ω3に制御し、鉄パイプ100の切断に要する時間を短時間にして、鉄パイプ100を切断する際の作業効率を高めることができる。
ここで、本実施形態においては、ブレードフォルダ8が、本発明の装着部の一例に相当し、コントローラ20が、本発明の制御部の一例に相当し、モニタ回路18が、本発明の負荷状態検出部の一例に相当し、トリガスイッチ16が、本発明の速度設定部の一例に相当する。
(変形例1)
例えば、上記実施形態では、動作設定部22は、レシプロソー2の動作モードを通常モード、第1モード、第2モードの何れかに設定できるように、操作部24の位置を3段階に切換可能な切換スイッチにて構成されているものとして説明した。
(変形例2)
また、上記実施形態では、レシプロソー2の動作モードが第1モード若しくは第2モードの制御モードに設定されているときには、予め設定された目標速度ω01、ω02、若しくは、第1速度ω1、第2速度ω2、第3速度ω3で、モータ10の回転速度ωを段階的に切り換えるものとして説明した。
(変形例3)
また次に、上記実施形態では、レシプロソー2の動作モードが第2モードにあるとき、モータ10の回転速度ωを、一旦、負荷モード2の第3速度ω3まで上昇させると、その後、トルクτが第3閾値τ3に低下するまで負荷モード2を保持し、トルクτが第3閾値τ3以下になったときに、モータ10の回転速度ωを無負荷モードの第1速度ω1に戻すものとして説明した。
(変形例4)
また、図10に例示するように、モータ10の回転速度ωを、一旦、負荷モード2の第3速度ω3まで上昇させた際には、トリガスイッチ16がオフ状態になって、モータ10の運転停止指令が入力されたと判断するまで、モータ10の回転速度ωを負荷モード2の第3速度ω3に維持し、トリガスイッチ16がオフ状態になったときに、モータ10の駆動を停止するようにしてもよい。
(変形例5)
また次に、上記実施形態では、レシプロソー2の動作モードが第2モードであるとき、モータ10の回転速度ωを、第1速度ω1から第3速度ω3までの3段階で段階的に上昇させるものとして説明した。
(変形例6)
また上記実施形態及び変形例では、モータ10の回転速度ωを切り換える際の条件としては、モニタ回路18を介して推定されるモータ10のトルクτを利用し、トルクτが第1条件である第1閾値τ1を越えたとき、及び、第2条件である第2閾値τ2を越えたときに、モータ10の回転速度ωを段階的に上昇させるものとして説明した。
なお、モータ10の回転速度ωを切り換えるのに用いる条件として、モータ10の負荷状態を表す状態量を用いる場合、上記実施形態のように、状態量として、必ずしもモータ10のトルクτを利用する必要はなく、モータ10に流れる電流や、モータ10の回転速度、或いはこれらを組み合わせて、状態量として利用するようにしてもよい。
(変形例7)
上記実施形態及び変形例においては、トリガスイッチ16に、トリガスイッチ16を最大引き量で保持するロックオン機構17(図1参照)が搭載されていても良い。
Claims (12)
- 往復動することにより被加工物を加工する先端工具を装着するための装着部と、
前記装着部を往復動させるためのモータと、
前記モータの回転を往復運動に変換して前記装着部を往復動させるように構成された動力伝達部と、
外部からの指令に従い、前記モータを運転するように構成された制御部と、
を備え、
前記制御部は、起動時には、前記モータを第1速度で運転し、起動後、第1条件が成立すると、前記モータを前記第1速度よりも高速の第2速度で運転し、前記第1条件成立後、第2条件が成立すると、前記モータを前記第2速度よりも高速の第3速度で運転するように構成されている、往復動電動工具。 - 請求項1に記載の往復動電動工具であって、
前記モータの負荷状態を表す状態量を検出するように構成された負荷状態検出部を備え、
前記制御部は、前記負荷状態検出部により検出される状態量に対して、少なくとも第1閾値と、該第1閾値よりも大きい第2閾値とを設定し、前記モータを前記第1速度で運転しているときに前記状態量が前記第1閾値に達すると、前記第1条件が成立したと判断して、前記モータを前記第2速度で運転し、前記モータを前記第2速度で運転しているときに前記状態量が前記第2閾値に達すると、前記第2条件が成立したと判断して、前記モータを前記第3速度で運転するように構成されている、往復動電動工具。 - 請求項1に記載の往復動電動工具であって、
前記制御部は、少なくとも第1時間と第2時間とを設定し、前記モータを前記第1速度で運転しているときに前記第1時間が経過すると、前記第1条件が成立したと判断して、前記モータを前記第2速度で運転し、前記モータを前記第2速度で運転しているときに前記第2時間が経過すると、前記第2条件が成立したと判断して、前記モータを前記第3速度で運転するように構成されている、往復動電動工具。 - 請求項1~請求項3の何れか1項に記載の往復動電動工具であって、
前記モータの回転速度を設定するための速度設定部を備え、
前記制御部は、前記モータの運転時には、前記第1条件若しくは前記第2条件の成立の有無に関わらず、前記モータの回転速度を、前記速度設定部にて設定された回転速度以下に制限するように構成されている、往復動電動工具。 - 請求項2又は請求項2を引用する請求項4に記載の往復動電動工具であって、
前記制御部は、前記モータを前記第3速度で運転しているときに、前記状態量が、前記第1閾値と同じ若しくは前記第1閾値よりも低い、第3閾値まで低下すると、前記モータを前記第1速度で運転するように構成されている、往復動電動工具。 - 請求項1~請求項4の何れか1項に記載の往復動電動工具であって、
前記制御部は、前記モータを前記第3速度で運転しているときは、前記モータの運転停止指令が入力されるまで前記モータの運転を継続し、前記モータの運転停止指令が入力されると、前記モータの運転を停止するように構成されている、往復動電動工具。 - 請求項5に記載の往復動電動工具であって、
前記制御部は、前記モータを前記第3速度で運転しているときに、前記状態量が、前記第2閾値と同じ若しくは前記第2閾値と前記第3閾値と間の、第4閾値まで低下すると、前記モータを前記第2速度で運転し、前記モータを前記第2速度で運転しているときに、前記状態量が、前記第1閾値と同じ若しくは前記第1閾値よりも低い、第3閾値まで低下すると、前記モータを前記第1速度で運転するように構成されている、往復動電動工具。 - 請求項1~請求項4の何れか1項に記載の往復動電動工具であって、
前記制御部は、前記モータを前記第3速度で運転しているときの経過時間が、予め設定された設定時間に達すると、前記モータを前記第1速度で運転するように構成されている、往復動電動工具。 - 請求項1~請求項8の何れか1項に記載の往復動電動工具であって、
さらに、
前記制御部が前記モータの運転を制御するのに用いる制御パラメータを、外部から設定するための制御パラメータ設定部を備えている、往復動電動工具。 - 請求項1~請求項9の何れか1項に記載の往復動電動工具であって、
前記制御部は、前記第1条件若しくは前記第2条件に従い前記モータの回転速度を切り換える制御モードとは別に、外部からの指令に従い前記モータを所定の回転速度で運転する通常モードでも動作可能に構成されており、
前記往復動電動工具は、さらに、
前記制御部の動作モードを、前記制御モードと前記通常モードとの何れかに設定するための動作設定部を備えている、往復動電動工具。 - 請求項1~請求項10の何れか1項に記載の往復動電動工具であって、
さらに、
トリガスイッチであって、前記制御部に対し、前記モータの運転を指令すると共に、当該トリガスイッチの引き量に応じて前記モータの回転速度を指令するように構成された、トリガスイッチを備え、
前記トリガスイッチは、当該トリガスイッチを最大引き量で保持するロックオン機能を有する、往復動電動工具。 - 請求項2、又は、請求項2を引用する請求項4~請求項11の何れか1項に記載の往復動電動工具であって、
前記負荷状態検出部は、前記モータの電流、回転速度、及びトルクの少なくとも一つを用いて、前記モータの負荷状態を表す状態量を算出するように構成されている、往復動電動工具。
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---|---|---|---|---|
WO2015061370A1 (en) | 2013-10-21 | 2015-04-30 | Milwaukee Electric Tool Corporation | Adapter for power tool devices |
JP6489346B2 (ja) * | 2014-06-30 | 2019-03-27 | 工機ホールディングス株式会社 | 電動工具 |
KR102251270B1 (ko) | 2016-01-05 | 2021-05-11 | 밀워키 일렉트릭 툴 코포레이션 | 전동 공구를 위한 진동 감소 시스템 및 그 방법 |
AU2017213819B2 (en) | 2016-02-03 | 2019-12-05 | Milwaukee Electric Tool Corporation | Systems and methods for configuring a reciprocating saw |
DE102016210937A1 (de) | 2016-06-20 | 2017-12-21 | Robert Bosch Gmbh | Handwerkzeugmaschine |
JP6901346B2 (ja) | 2017-08-09 | 2021-07-14 | 株式会社マキタ | 電動作業機 |
JP6916060B2 (ja) * | 2017-08-09 | 2021-08-11 | 株式会社マキタ | 電動作業機 |
CN107671360A (zh) * | 2017-09-09 | 2018-02-09 | 浙江亚特电器有限公司 | 用于降低往复锯振动的控制方法 |
US10835972B2 (en) | 2018-03-16 | 2020-11-17 | Milwaukee Electric Tool Corporation | Blade clamp for power tool |
USD887806S1 (en) | 2018-04-03 | 2020-06-23 | Milwaukee Electric Tool Corporation | Jigsaw |
EP3774148A4 (en) | 2018-04-03 | 2021-12-15 | Milwaukee Electric Tool Corporation | JIGSAW |
CN110880903A (zh) * | 2018-09-06 | 2020-03-13 | 米沃奇电动工具公司 | 使用电动工具的速度控制进行热管理的系统和方法 |
JP7282608B2 (ja) * | 2018-09-10 | 2023-05-29 | 株式会社マキタ | 打撃工具 |
CN110883737B (zh) | 2018-09-10 | 2024-02-13 | 株式会社牧田 | 作业工具 |
CN112809087B (zh) * | 2019-11-15 | 2022-07-12 | 苏州宝时得电动工具有限公司 | 往复锯 |
JP6885455B2 (ja) * | 2019-12-27 | 2021-06-16 | 工機ホールディングス株式会社 | 電動工具 |
WO2022010851A1 (en) | 2020-07-06 | 2022-01-13 | Milwaukee Electric Tool Corporation | Automatic ramp load sense for power tools |
CN114083494B (zh) * | 2021-02-20 | 2023-07-25 | 博世电动工具(中国)有限公司 | 往复式电动工具 |
CN113162485A (zh) * | 2021-04-12 | 2021-07-23 | 浙江博来工具有限公司 | 电动工具 |
JP2023009617A (ja) * | 2021-07-07 | 2023-01-20 | 株式会社マキタ | 携帯用バンドソー |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6150712A (ja) * | 1984-08-11 | 1986-03-13 | Hitachi Zosen Corp | 遠隔式レシプロ切断機の自動送り装置 |
JPH01281814A (ja) * | 1988-04-28 | 1989-11-13 | Mitsubishi Electric Corp | 鋸断装置 |
JP2006168226A (ja) * | 2004-12-16 | 2006-06-29 | Sumco Corp | 切断装置及びその制御方法並びにシリコン単結晶の切断方法 |
JP2009297805A (ja) * | 2008-06-10 | 2009-12-24 | Makita Corp | 丸鋸 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2407601C2 (de) * | 1974-02-16 | 1980-04-17 | Robert Bosch Gmbh, 7000 Stuttgart | Steuereinrichtung zur Absenkung der Drehzahl eines wechselstromgespeisten Reihenschlußmotors im Leerlaufbetrieb |
DE3335237A1 (de) * | 1983-09-29 | 1985-04-11 | Kress-elektrik GmbH & Co, Elektromotorenfabrik, 7457 Bisingen | Verfahren und vorrichtung zur regelung eines elektromotors, bei welchem die drehzahl im lastfreien leerlaufbetrieb automatisch abgesenkt wird |
DE3903133A1 (de) * | 1988-02-04 | 1989-08-31 | Amada Co | Werkstueckbearbeitbarkeitsdetektionsverfahren und verfahren zum spanabhebenden bearbeiten eines werkstuecks mit hilfe einer spanabhebenden bearbeitungsmaschine unter anwendung dieses verfahrens |
WO1994019134A1 (en) * | 1993-02-18 | 1994-09-01 | M-Pact Corporation | Cutting device and assembly |
US7127973B2 (en) * | 1998-02-09 | 2006-10-31 | Milwaukee Electric Tool Corporation | Reciprocating saw |
US7600455B2 (en) * | 2000-08-14 | 2009-10-13 | Sd3, Llc | Logic control for fast-acting safety system |
US7210383B2 (en) * | 2000-08-14 | 2007-05-01 | Sd3, Llc | Detection system for power equipment |
JP4010239B2 (ja) * | 2002-12-11 | 2007-11-21 | 日立工機株式会社 | 回転数制御装置 |
US7296356B2 (en) * | 2004-04-14 | 2007-11-20 | Eastway Fair Company Limited | Toolless adjustable base for a portable saw |
US20060117580A1 (en) * | 2004-10-16 | 2006-06-08 | Serdynski David P | Power tool and method of operating the same |
CN201036840Y (zh) * | 2005-09-30 | 2008-03-19 | 苏州宝时得电动工具有限公司 | 电动工具 |
JP2008178935A (ja) * | 2007-01-24 | 2008-08-07 | Makita Corp | 電動打撃工具 |
DE102007034529A1 (de) * | 2007-07-25 | 2009-01-29 | Robert Bosch Gmbh | Handwerkzeugmaschine |
DE102007000533B4 (de) * | 2007-10-19 | 2018-01-11 | Hilti Aktiengesellschaft | Hubsägemaschine mit Hubzahleinstellung |
US8387717B2 (en) * | 2008-04-28 | 2013-03-05 | Michael Rogler Kildevaeld | Multi directional oscillation from a rotational source |
JP5435899B2 (ja) * | 2008-06-10 | 2014-03-05 | 株式会社マキタ | 丸鋸 |
JP5263716B2 (ja) * | 2009-01-19 | 2013-08-14 | 日立工機株式会社 | 電動工具 |
JP5403328B2 (ja) * | 2009-02-02 | 2014-01-29 | 日立工機株式会社 | 電動穿孔工具 |
US8752301B2 (en) * | 2009-04-08 | 2014-06-17 | Rex George | Chainsaw incorporating a safety device system |
US8172004B2 (en) * | 2009-08-05 | 2012-05-08 | Techtronic Power Tools Technology Limited | Automatic transmission for a power tool |
US9425730B2 (en) * | 2011-02-10 | 2016-08-23 | Makita Corporation | Apparatus for estimating quantity of state relating to motor, and electric tool |
JP2012187025A (ja) * | 2011-03-09 | 2012-10-04 | Kubota Corp | 乗用作業車 |
CN102699435A (zh) * | 2012-04-30 | 2012-10-03 | 苏州赛特尔集团机械有限公司 | 一种用于数控切割机的切割系统 |
US20140053419A1 (en) * | 2012-08-06 | 2014-02-27 | Black & Decker Inc. | Control circuit for reciprocating saws |
-
2013
- 2013-07-24 JP JP2013153778A patent/JP6181450B2/ja active Active
-
2014
- 2014-03-31 DE DE112014003403.7T patent/DE112014003403B4/de active Active
- 2014-03-31 WO PCT/JP2014/059527 patent/WO2015011955A1/ja active Application Filing
- 2014-03-31 US US14/904,240 patent/US20160151845A1/en not_active Abandoned
- 2014-03-31 CN CN201480041563.3A patent/CN105408044B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6150712A (ja) * | 1984-08-11 | 1986-03-13 | Hitachi Zosen Corp | 遠隔式レシプロ切断機の自動送り装置 |
JPH01281814A (ja) * | 1988-04-28 | 1989-11-13 | Mitsubishi Electric Corp | 鋸断装置 |
JP2006168226A (ja) * | 2004-12-16 | 2006-06-29 | Sumco Corp | 切断装置及びその制御方法並びにシリコン単結晶の切断方法 |
JP2009297805A (ja) * | 2008-06-10 | 2009-12-24 | Makita Corp | 丸鋸 |
Also Published As
Publication number | Publication date |
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CN105408044A (zh) | 2016-03-16 |
DE112014003403B4 (de) | 2021-01-14 |
JP6181450B2 (ja) | 2017-08-16 |
CN105408044B (zh) | 2018-10-26 |
DE112014003403T5 (de) | 2016-05-25 |
JP2015024512A (ja) | 2015-02-05 |
US20160151845A1 (en) | 2016-06-02 |
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