DE202019101102U1 - Electrically powered tool - Google Patents

Abstract

Electrically powered tool (1), comprising:
a motor (4) adapted to rotate forwards and backwards,
a power transmission portion configured to transmit the rotational force of the motor (4) to a tightening member;
a front end work holding portion configured to hold the tightening member to an output shaft of the power transmission portion, and
a control section (51) configured to control the rotation of the motor (4),
wherein the control section (51) has a special mode as an operation mode for controlling the rotation of the motor (4), which is a first special mode, which is an operation mode in which the motor (4) is driven in a forward rotation direction, in which the tightening element is attracted to an object and includes a second special mode which is an operation mode in which the motor (4) is driven in a reverse direction opposite to the forward direction of rotation, and is adapted to perform at least one special forward rotation control in the first special mode the speed of the motor (4) is changed in response to an increase in the apply load, and in the second special mode, at least one special reverse rotation control can be performed in which the speed of the motor (4) is changed in response to the release of the tightened tightening element.

Description

Technical area

The present disclosure relates to an electrically driven tool with which a tightening operation and a releasing operation of a tightening element are performed.

General state of the art

In Patent Document 1, there is provided an electrically driven tool in which an instantaneous torque is intermittently generated by striking a hammer on the anvil in case a torque is applied to an anvil at or above a predetermined value. The configuration of the electrically driven tool set forth in Patent Document 1 is such that, when driving an engine in a reverse direction for loosening nuts, the rotation of the motor is stopped after a specified time after no hammering of the hammer has been detected. Thus, in the electric power tool of Patent Document 1, by stopping the rotation of the motor after loosening a nut before it is completely released from a screw or the like, complete disengagement of the nut from the screw or the like is inhibited, thereby making disassembly work more efficient become.

Documents of the prior art

Patent documents

Patent Document 1: Japanese Patent Publication No. 3660554

Brief description of the teachings

Object of the present teachings

However, there are also working environments in work environments such as assembly work of temporary scaffolds in which both nuts are loosened and nuts are used in an electrically powered tool. If the electric power tool over-tightens a nut, it will affect the nut, and therefore, in a work environment where nuts are both loosened and tightened, not only excessive loosening of the nuts but also over-tightening of the nuts must be inhibited. When the electric power tool of Patent Document 1 is used in such a working environment, the user must be careful not to tighten the nuts when operating the power nut-tightening tool, so there is a possibility that the tightening efficiency may be lowered compared to Dissolution drops.

One aspect of the present disclosure is that excellent usability of an electrically powered tool is desired in a work environment in which tightening elements are both loosened and tightened.

Means for solving the problem

An aspect of the present disclosure relates to an electric power tool including a motor, a power transmission portion, a front end work holding portion, and a control portion. The motor is designed so that it can rotate forwards and backwards. The power transmission portion is formed to transmit the rotational force of the engine to a tightening member. The front end work holding portion is formed to hold the tightening member on an output shaft of the power transmission portion. The control section is configured to control the rotation of the motor. The control section has, as an operation mode for controlling the rotation of the motor, a special mode having a first special mode which is an operation mode in which the motor is driven in a forward rotation direction in which the tightening element is tightened on an object and a second special mode which is an operation mode in which the motor is driven in a reverse direction opposite to the forward direction of rotation. The control section is configured to perform at least one special forward rotation control in the first special mode, in which the rotational speed of the engine is changed in response to an increase in the apply load, and in the second special mode to perform at least one special reverse rotation control in which the rotational speed of the engine is in Reaction to the release of the tightened tightening element is changed.

According to the electrically driven tool of one aspect of the present disclosure, in the first special mode, the control section may execute at least the special forward rotation control and at least execute the special reverse rotation control in the second special mode. The special forward rotation control is a control for changing the rotational speed of the engine until the rising load and the rising of the tightening load. Thus, the tightening of the tightening member can be performed smoothly and efficiently. The special reverse rotation control is a control for changing the rotational speed of the motor until the tightening element is released and after the tightening element is released. Thus, the release of the tightening member can be performed smoothly and efficiently. Therefore, the electric power tool can achieve excellent usability in a work environment in which tightening elements are both loosened and tightened.

In addition, the control section has, as the operation mode, a normal mode that is an operation mode in which the engine is driven in accordance with a selected speed setting value. The control section may be configured to switch the operating mode between the normal mode and the special mode.

According to the electric power tool, since use is possible by switching between the normal mode and the special mode, an even higher user-friendliness can be achieved. In the first special mode, the control section may selectively execute one of the special forward rotation control and forward rotation control in which the engine is driven in accordance with a selected forward speed rotation value, and in the second special mode may selectively execute one of the special reverse rotation control and reverse rotation control in which the engine is driven is driven at a selected speed setting in the reverse direction. The control section may be configured to be separate, such that when the operation mode is in the special mode, a control executed by the special forward rotation control and the forward rotation control as the first special mode is selected and set, and separately one of the special reverse rotation control and the reverse rotation control the control executed in the second special mode is selected and set.

With the electric power tool, when the operation mode is switched to the special mode, the control executed in the first special mode and the control executed in the second special mode can be separately selected and set. In this way, a suitable adaptation to a working environment is possible in which care must be taken only on the tightening or only on the release of the tightening element. According to this electrically driven tool, excellent user-friendliness can thus be achieved in various work environments.

The electric power tool may also have a forward / reverse switching section for setting the direction of rotation of the motor. The control section may be configured to perform, when the operation mode is switched to the special mode and set by the forward / reverse switching section, the forward rotation direction, as the control executed in the first special mode. Also, the control section may be configured to perform, when the operation mode is switched to the special mode and set by the forward / reverse switching section, the reverse direction, a control set as the control executed in the second special mode.

According to this electric power tool, when the operation mode is switched to the special mode, the control selected for the first special mode or the control selected for the second special mode can be executed in accordance with the rotation direction set by the forward / reverse switching section.

The electric power tool may also include a setting display section configured to display the setting state of the control selected for the first special mode and the setting state of the control selected for the second special mode.

Thereby, when using the power tool, the user can check the setting state of the first special mode and the second special mode. The setting display section may also be configured to simultaneously display two setting states.

As a result, when using the power tool, the user can simultaneously check the setting state of the first special mode and the second special mode. Thus, an even higher user-friendliness can be achieved.

The electrically powered tool may also include a selection operation section. The selection operation section is for selecting the speed setting value and the control executed in the first special mode and in the second special mode. In this case, the control section may be configured such that when the operation mode is switched to the normal mode, the speed setting value is selected according to an operation of the selection operation section. In addition, the control section may be configured such that when the operation mode is switched to the special mode, the control executed in the first special mode and the second special mode is selected according to an operation of the selection operation section.

Thereby, a single selection operation section can be used both for selecting the speed setting value and for selecting the control executed in the first special mode and the second special mode. This reduces the number of operating sections and thus saves installation space for operating sections on the electrically driven tool.

The selection operation section may also be used to switch the operation mode. The control section may be configured to switch the operation mode according to an operation of the selection operation section between the normal mode and the special mode.

Therefore, no separate operating section for switching the operating mode must be provided, which is why even more installation space is saved for operating sections on the electrically driven tool. The control section may be configured such that when the selection operation section is pressed shorter than a preset threshold duration, the speed setting value is selected. The control section may also be configured such that when the selection operation section is pressed longer than the threshold duration, the control executed in the first special mode and the second special mode is selected.

By changing the duration with which it presses the selection operation section, the user can distinguish between the uses of the selection operation section for selecting the speed setting value and selecting the control executed in the first special mode and the second special mode.

The electric power tool may also have a select operation section for changing the speed set value and a mode operation section for switching between the normal mode and the special mode. The control section may be configured such that when the operation mode is switched to the normal mode, the speed setting value is selected according to an operation of the selection operation section.

By providing two operation sections in accordance with the electrically driven tool having the selection operation section and the mode operation section, by operating the respective operation section, the user can easily perform the selection of the speed setting value and the switching of the operation mode.

The selection operation section may also be used to adjust the tightening force after an increase in the tightening load and a value related to the amount of movement of the tightening element after release of the tightening element. The control portion may be configured such that when the special forward rotation control is performed in the first special mode, the tightening force of the tightening member is adjusted after the rise of the tightening load according to an operation of the selection operation portion. The control section may be further configured such that when the special reverse rotation control is performed in the second special mode, the value related to the amount of movement of the tightening member is adjusted after releasing the tightening member in accordance with an operation of the selection operation portion.

In this way, in accordance with an operation of the selection operation section, since the tightening force of the tightening element can be adjusted after the rise of the tightening load and the amount of movement of the tightening element after release of the tightening element, even more user-friendliness of the power tool can be achieved.

The electrically powered tool may also include an information display section. The information display section can display tightening force information when the special forward rotation control is executed in the first special mode, and information about the movement amount in the second special mode when the special reverse rotation control is executed.

As a result, information about the tightening force of the tightening element after the rise of the tightening load and information about the amount of movement of the tightening element after releasing the tightening element can be displayed. Therefore, when using the electric power tool, the user can check the tightening force and the amount of movement.

list of figures

• 1 eine Längsschnittansicht eines elektrisch angetriebenen Werkzeugs einer Ausführungsform;
• 2 ein Blockschaubild, das den elektrischen Aufbau einer Motorantriebsvorrichtung veranschaulicht;
• 3 eine schematische Ansicht, die den Aufbau eines Einstellabschnitts gemäß einer ersten Ausführungsform darstellt;
• 4 ein Ablaufdiagramm einer Einstellverarbeitung der ersten Ausführungsform;
• 5 ein Ablaufdiagramm einer Spezialmoduseinstellverarbeitung der ersten Ausführungsform;
• 6 eine schematische Ansicht, die veranschaulicht, wie an dem Einstellabschnitt der ersten Ausführungsform die Anzeige umgeschaltet wird;
• 7 ein Ablaufdiagramm einer Spezialrückwärtsdrehungsmotorantriebsverarbeitung;
• 8 ein Ablaufdiagramm einer Autostopp-Erkennungsverarbeitung;
• 9 ein Zeitleistendiagramm zum Beschreiben der Wirkungsweise einer Spezialrückwärtsdrehungssteuerung;
• 10 ein Ablaufdiagramm einer Spezialvorwärtsdrehungsmotorantriebsverarbeitung;
• 11 ein Ablaufdiagramm einer Aufsetzerkennungsverarbeitung;
• 12 ein Zeitleistendiagramm zum Beschreiben der Wirkungsweise einer Spezialvorwärtsdrehungssteuerung;
• 13 eine schematische Ansicht, die den Aufbau eines Einstellabschnitts gemäß einer zweiten Ausführungsform darstellt;
• 14 ein Ablaufdiagramm einer Einstellverarbeitung der zweiten Ausführungsform;
• 15 ein Ablaufdiagramm einer Normalmoduseinstellverarbeitung der zweiten Ausführungsform;
• 16 ein Ablaufdiagramm einer ersten Spezialmoduseinstellverarbeitung der zweiten Ausführungsform;
• 17 ein Ablaufdiagramm einer zweiten Spezialmoduseinstellverarbeitung der zweiten Ausführungsform;
• 18 eine schematische Ansicht, die veranschaulicht, wie an dem Einstellabschnitt der zweiten Ausführungsform eine Anzeige zum Anzeigen von Informationen zur Spezialvorwärtsdrehungssteuerung umgeschaltet wird;
• 19 eine schematische Ansicht, die veranschaulicht, wie an dem Einstellabschnitt der zweiten Ausführungsform eine Anzeige zum Anzeigen von Informationen zur Spezialrückwärtsdrehungssteuerung umgeschaltet wird;
• 20 ein Ablaufdiagramm einer Spezialvorwärtsdrehungsmotorantriebsverarbeitung gemäß einer dritten Ausführungsform;
• 21 ein Ablaufdiagramm einer Schlagerkennungsverarbeitung gemäß der dritten Ausführungsform; und
• 22 ein Zeitleistendiagramm zum Beschreiben der Wirkungsweise einer Spezialvorwärtsdrehungssteuerung gemäß der dritten Ausführungsform.

Show it:

• 1 a longitudinal sectional view of an electrically driven tool of an embodiment;
• 2 a block diagram illustrating the electrical construction of a motor drive device;
• 3 a schematic view illustrating the structure of a setting section according to a first embodiment;
• 4 a flowchart of a setting processing of the first embodiment;
• 5 a flowchart of a special mode setting processing of the first embodiment;
• 6 a schematic view illustrating how the display is switched on the setting section of the first embodiment;
• 7 a flow chart of a special reverse rotation motor drive processing;
• 8th a flowchart of auto-stop detection processing;
• 9 a timing chart for describing the operation of a special reverse rotation control;
• 10 a flowchart of a special forward rotation motor drive processing;
• 11 a flowchart of a Aufsetzerkennungsprozess;
• 12 a timing chart for describing the operation of a special forward rotation control;
• 13 a schematic view illustrating the structure of a setting section according to a second embodiment;
• 14 a flowchart of a setting processing of the second embodiment;
• 15 a flowchart of a normal mode setting processing of the second embodiment;
• 16 Fig. 10 is a flow chart of a first special mode setting processing of the second embodiment;
• 17 a flowchart of a second special mode setting processing of the second embodiment;
• 18 12 is a schematic view illustrating how, at the setting section of the second embodiment, a display for displaying information on the special forward rotation control is switched;
• 19 Fig. 12 is a schematic view illustrating how, at the setting section of the second embodiment, a display for displaying information on the special reverse rotation control is switched;
• 20 FIG. 10 is a flowchart of a special forward rotation motor drive processing according to a third embodiment; FIG.
• 21 a flowchart of a stroke recognition processing according to the third embodiment; and
• 22 a timing chart for describing the operation of a special forward rotation control according to the third embodiment.

Embodiment of the invention

Embodiments of the invention will now be described with reference to the figures.

First embodiment

construction

overall structure

With reference to 1 becomes an electrically driven tool 1 of the present embodiment. The electrically powered tool 1 The present first embodiment is designed as a rechargeable pulse wrench. In the description of the electrically driven tool 1 the top-bottom direction is the top-bottom direction of 1 , the back is the left side of 1 and the front is the right side of 1 ,

As in 1 shown includes the electrically powered tool 1 a tool main body 10 and a battery pack 30 , the tool main body 10 supplying electrical energy. The tool main body 10 includes a housing 2 in which a motor 4 and a work section 6 are received, and one from the lower portion of the housing 2 protruding formed handle portion 3 ,

Inside the case 2 is the engine behind 4 taken and in front of the engine 4 a bell-shaped hammer housing 5 grown. In the hammer case 5 is the working section 6 added.

The working section 6 includes a spindle 7 , one from the outside on the spindle 7 put hammer 14 , one on the front of the hammer 14 stored anvil 15 and a coil spring 16 that the hammer 14 biased forward.

The spindle 7 has a hollow portion and is inside the hammer housing 5 on the side of the rear end thereof with respect to the hammer case 5 recorded coaxially. An outer circumference at the rear end of the spindle 7 is by a on the side of the rear end in the hammer housing 5 provided ball bearing 8th stored.

At the spindle 7 stands on the front of the ball bearing 8th a planetary gear mechanism 9 with a ring gear 11 engaged. The ring gear 11 is on an inner peripheral surface on the side of the rear end of the hammer housing 5 educated. The planetary gear mechanism 9 has two with respect to a rotational axis point-symmetrically mounted planetary gears and is equipped with a pinion 13 toothed, that at a front end portion of an output shaft 12 of the motor 4 is formed. The output shaft 12 is coaxial with a rotor 4a of the motor 4 fixed.

The hammer 14 is in relation to the spindle 7 is integrally rotatable coupled and movable in the axial direction and is by the coil spring 16 forward (ie to the anvil 15 biased). A front end portion of the spindle 7 is coaxial with play in the back end of the anvil 15 introduced and is thereby rotatably supported. The anvil 15 subject to the torque and impact of the hammer 14 and thereby turns around its axis. The anvil 15 is through a at the front end of the case 2 provided shaft bearing 20 rotatably supported about the axis and not displaceable in the axial direction. At the front end portion of the anvil 15 is a mounting section 19 formed for attaching a nut. The nut is a leading end tool for rotating a tightening element such as a nut or screw. On the representation of the nut is omitted.

The output shaft 12 of the motor 4 , the spindle 7 , the hammer 14 , the anvil 15 and the attachment section 19 of the anvil 15 are arranged coaxially with each other. At a front end surface of the hammer 14 are two hit tab sections 17 . 17 projecting at a distance of 180 ° in the circumferential direction to impact on the anvil 15 exercise. On the side of the rear end of the anvil 15 again, there are two beating arms 18 . 18 formed at a distance of 180 ° in the circumferential direction, which are formed such that they respectively in contact with the impact projection portions 17 . 17 of the hammer 14 can reach.

By the hammer 14 by the biasing force of the coil spring 16 to the front end of the spindle 7 held biased, lie the impact projection sections 17 . 17 of the hammer 14 on the flapping arms 18 . 18 of the anvil 15 on.

When the flip tab sections 17 . 17 on the flapping arms 18 . 18 abut and the spindle 7 about the planetary gear mechanism 9 by the torque of the motor 4 is turned, the hammer turns 14 together with the spindle 7 and the torque of the hammer 14 Beyond the loft tab sections 17 . 17 and the bats 18 . 18 on the anvil 15 transfer. This will rotate the nut on the attachment section 19 at the front end of the anvil 15 is appropriate.

When the direction of rotation of the motor 4 the forward direction of rotation, in which a tightening element such as a nut or screw is tightened on a tightening object, the tightening element can be tightened with the nut. The forward rotation direction in the present embodiment is as viewed from the rear end of the electrically driven tool 1 forward to the right. If it is the direction of rotation of the motor 4 the reverse direction of rotation is opposite to the forward direction of rotation, the tightened tightening element can be released through the nut.

When at a forward rotation and at a reverse rotation of the engine 4 a torque at or above a predetermined value in a direction opposite to the direction of rotation of the motor 4 from the outside on the anvil 15 acts, reaches or exceeds the torque (ie the torque) of the hammer 14 in relation to the anvil 15 a set value. This shifts the hammer 14 against the biasing force of the coil spring 16 to the rear, so that the impact projection sections 17 . 17 of the hammer 14 the beating arms 18 . 18 of the anvil 15 overcome. That is, the impact projection sections 17 . 17 of the hammer 14 separate a little way from the striking arms 18 . 18 of the anvil 15 and run empty. A forward rotation of the engine 4 means that the engine 4 is driven in the forward direction of rotation, and a reverse rotation of the motor 4 means that the engine 4 is driven in the reverse direction.

When the flip tab sections 17 . 17 of the hammer 14 the beating arms 18 . 18 of the anvil 15 overcome, the hammer turns 14 together with the spindle 7 and shifts due to the biasing force of the coil spring 16 back to the front, so the lug projection sections 17 . 17 of the hammer 14 in the direction of rotation on the beater arms 18 . 18 of the anvil 15 beat.

Whenever with the electrically driven tool 1 a torque at or above the specified value on the anvil 15 is exercised, so suggests the hammer 14 on the anvil 15 , By doing so, the impact of the hammer 14 intermittently on the anvil 15 is exercised during a forward rotation of the engine 4 the tightening element is tightened with high torque and with a reverse rotation of the motor 4 be solved. In the present embodiment, the hammer corresponds 14 the power transmission section and the anvil 15 the front end tool holding section.

The grip section 3 is a part that a user uses when using the electrically powered tool 1 grasps. Above the handle section 3 is a trigger switch 21 intended. The trigger switch 21 includes a user-operated trigger 21a and a switch main section 21b , which is designed such that it by pulling the trigger pull 21a is switched on and off and its resistance is proportional to the operating dimension (ie the Zugmaß) of the trigger 21a changed.

On top of the trigger switch 21 (ie the side of the lower end of the housing 2 ) is a forward-backward switch 22 provided, which is operated by the user pulling, to the direction of rotation of the motor 4 in the forward direction of rotation or the reverse direction of rotation. In the present embodiment, the forward-backward switch corresponds 22 the forward / reverse switching section.

Also, the front is at the bottom of the case 2 a lighting LED 23 provided by pulling the trigger 21a the area in front of the electrically driven tool 1 illuminated. At the bottom of the handle section 3 is an adjustment section 24 for setting the operating mode and the like of the electrically driven tool 1 intended. The adjustment section 24 includes, as in 3 shown a selector switch 63 , a speed display section 64 and a special mode display section 65 , The selector switch 63 is a key-type switch designed to be pressed by the user. The speed display section 64 includes three LEDs, namely an L-speed LED 64a , an M-speed LED 64b and a H-speed LED 64c , The special mode display section 65 includes three LEDs, namely a special mode LED 65a , a forward turn LED 65b and a reverse rotation LED 65c , In the present embodiment, the selection switch corresponds 63 the selection operation section and the special mode display section 65 the setting display section.

At the bottom of the handle section 3 is a battery pack 30 in which a battery 29 is added, releasably attached. The battery pack 30 is attached by placing it with respect to the lower end of the handle portion 3 is moved from front to back. The in the battery pack 30 recorded battery 29 is a repeatedly chargeable secondary cell such as a lithium ion secondary cell or the like.

Next, referring to 2 the electrical structure of the engine 4 and a motor drive device 40 of the motor 4 described. The motor 4 In the present embodiment, a three-phase brushless motor is provided with U, V and W armature windings.

The motor drive device 40 comprises a control device 51 , a three-phase converter 52 , a measuring resistor element 53 , an amplifier 54 and a Hall sensor 56 , The Hall sensor 56 has a Hall element as the electromagnetic transducer element, and is a rotational position sensor configured to detect the rotational position of the rotor of the motor 4 detected. The Hall sensor 56 gives based on the magnetic field change in the course of the rotation of the rotor of the motor 4 For each phase U, V and W, a position detection signal (hereinafter Hall sensor signal) Hu, Hv and Hw. In the present embodiment, the Hall sensor signals Hu, Hv and Hw switch between "high" and "low" with every 180 ° rotation of the electrical angle of the rotor. The phase of the Hall sensor signals Hu, Hv and Hw shifts all by 120 ° of the electrical angle.

With every 60 ° rotation of the electrical angle of the rotor of the motor 4 by 60 ° thus results in a signal state change edge of the Hall sensor signals Hu, Hv and Hw. The signal state change edge includes both the rising edge from "low" to "high" and the falling edge from "high" to "low". Hereinafter, the signal state change edge will be referred to as an edge for short. The Hall sensor signals Hu, Hv and Hw are collectively referred to as Hall sensor signals H.

The three-phase inverter 52 is, for example, a three-phase full bridge circuit with six switching elements and is connected to the three phase windings of the motor 4 connected. The three-phase inverter 52 is a circuit that comes from the battery pack 30 which is a DC power supply, is supplied with electric power, current to the phase windings of the motor 4 lets flow and the engine 4 drives.

The measuring resistor element 53 is in series with the three phase inverter 52 switched and is for detecting the in the engine 4 flowing current provided. Two input terminals of the amplifier 54 are with two terminals of the measuring resistor element 53 connected, and an output terminal is connected to the control device 51 connected. The amplifier 54 thus amplifies that of the measuring resistor element 53 detected current and fed this into the controller 51 on.

The control device 51 comprises a microcomputer with a CPU, ROM, RAM, I / O and the like. The control device 51 performs various functions by not having the CPU in one transitory tangible storage medium such as ROM executes stored programs. Due to the execution of the programs by the CPU, procedures corresponding to the programs are executed. The procedure for exercising the functions of the control device 51 is not limited to software, and the functions may also be practiced partially or entirely using hardware with a combination of logic circuits, analog circuits, and the like. In the present embodiment, the control device corresponds 51 the control section.

With the control device 51 are the trigger switch 21 , the forward-reverse switch 22 , the selector switch 63 , the amplifier 54 and the three-phase converter 52 connected. The control device 51 has a normal mode and a special mode as operating modes for controlling the rotation of the motor 4 on.

In normal mode, the controller drives 51 the engine 4 according to a selected speed setting value in a fixed direction of rotation. When the operation mode is set to the normal mode, the controller selects 51 according to an operation of the selection switch 63 the user sets the speed setting value from a high speed set value, a middle speed set value, and a low speed set value. In accordance with an operation of the forward-backward switch 22 by the user puts the control device 51 the direction of rotation of the motor 4 in the forward direction of rotation or the reverse direction.

When the trigger switch 21 is actuated, determines the controller 51 based on the Hall sensor signals H from the Hall sensor 56 Rotational position and speed of the motor 4 and drives the engine 4 in the specified direction and with the selected speed setting. Specifically, the controller controls 51 the engine speed, by the duty cycle of the switching elements in the three-phase converter according to the selected speed setting 52 and the three-phase converter 52 drives with this duty cycle.

The special mode, which is the other operating mode, is an operating mode used for certain operations and includes a first special mode and a second special mode. The first special mode is an operating mode in which the engine 4 is driven in the forward direction of rotation, and the second special mode is an operating mode in which the engine 4 is driven in the reverse direction.

The control device 51 In the first special mode, it may selectively execute a special forward rotation control or a forward rotation control. The special forward rotation control is a control for changing the engine speed in accordance with an increase in the application load. More specifically, the special forward rotation control is a controller in which the engine speed is reduced or the engine is responsive to a tightening member such as a nut or the like being placed on a tightening object such as a carrier (such as a wall or a plate) 4 is stopped. In addition, the forward rotation control is a control in which the engine 4 is driven in the forward direction of rotation in accordance with the selected speed setting value. The touchdown is a state immediately prior to tightening the tightening element, in which the tightening element comes into contact with the surface of the tightening object.

The control device 51 may selectively perform a special reverse rotation control or a reverse rotation control in the second special mode. The special reverse rotation control is a control for changing the engine speed in response to the tightened tightening element being released. More specifically, the special reverse rotation control is a control in which the engine speed is reduced or the engine in response to the tightened tightening element being released 4 is stopped. The reverse rotation control is a control in which the engine 4 is driven in the reverse direction according to the selected speed setting.

The control device 51 Switches the operating mode according to an operation of the selector switch 63 by the user between the normal mode and the special mode. In addition, the controller selects 51 . when the operation mode is set to the special mode, the control executed in the first special mode and the second special mode is according to an operation of the selection switch 63 by the user.

The control device 51 is capable of separately executing such that when the operation mode is switched to the special mode, a control executed by the special forward rotation control and the forward rotation control as the first special mode is selected and set, and separately one of the special backward rotation control and the forward rotation control is selected and set , The control device 51 When the operation mode is set to the special mode and the forward rotation direction is set, the control set as the control executed in the first special mode is executed. The control device 51 Also, when the operation mode is set to the special mode and the reverse direction is set, it executes the control set as the control executed in the second special mode.

processing

setting processing

Next, referring to the flowchart of FIG 4 one from the controller 51 executed setting processing described. The control device 51 begins with the execution of the adjustment processing when the trigger switch 21 is turned on.

at S10 turns on the controller 51 First change the operating mode to normal mode and set the speed mode to L mode. That is, the controller 51 selects as the speed setting of the motor 4 the low speed setpoint. Then leaves the controller 51 , as in 6 (a) shown the L-speed LED 64a come on.

Then, at S20 , judges the controller 51 whether the selector switch 63 briefly pressed by the user. A short press is a press of the selector switch 63 for a duration shorter than a predetermined threshold duration. When the controller 51 at S20 judges that no short press has occurred, it returns S10 back, and if she judges that a short press has occurred, she goes with it S30 continued.

at S30 represents the controller 51 set the speed mode to M mode. That is, the controller 51 selects as the speed setting of the motor 4 the set value for medium speed off. Then leaves the controller 51 , as in 6 (b) shown in addition to the L-speed LED 64a the M-speed LED 64b come on.

Then the controller judges 51 at S40 whether the selector switch 63 briefly pressed by the user. When the controller 51 at S40 judges that no short press has occurred, it returns S30 back, and if she judges that a short press has occurred, she goes with it S50 continued.

In S50 represents the controller 51 set the speed mode to H mode. That is, the controller 51 selects as the speed setting of the motor 4 the set value for high speed off. Then leaves the controller 51 , as in 6 (c) shown in addition to the L-speed LED 64a and the M-speed LED 64b the H-speed LED 64c come on.

Then the controller judges 51 at S60 whether the selector switch 63 briefly pressed by the user. When the controller 51 in S60 judges that no short press has occurred, it returns S50 back, and if she judges that a short press has occurred, she goes with it S70 continued.

In S70 turns on the controller 51 change the operating mode to the special mode and execute special mode setting processing. The special mode setting processing will be described in detail below. Upon completion of the special mode setting processing, the controller returns 51 to S10 back.

Spezialmoduseinstellverarbeitung

Next, referring to the flowchart of FIG 5 that of the controller 51 executed special mode setting processing described.

First, the controller activates 51 at S100, the special forward rotation control as the control executed in the first special mode and the special reverse rotation control as the control executed in the second special mode. Then the controller leaves 51 , as in 6 (d) shown in addition to the three LEDs of the speed display section 64 the special mode LED 65a , the forward turn LED 65b and the reverse rotation LED 65c come on. This indicates that the operation mode is in the special mode and that the special forward rotation control and the special reverse rotation control are activated. The activated state of the special forward rotation control is a state in which, as the control executed in the first special mode, the special forward rotation control is selected and set. The activated state of the special reverse rotation control is a state in which, as the control executed in the second special mode, the special reverse rotation control is selected and set.

Then the controller judges 51 at S110 whether the selector switch 63 briefly pressed by the user. When the controller 51 at S110 judges that a short press has occurred, it terminates the special mode setting processing and returns S10 back, and if she judges that no short press has occurred, she goes with S120 continued.

at S120 judges the controller 51 whether the selector switch 63 long pressed by the user. A long press is a press of the selector switch 63 for a duration longer than a predefined threshold duration. When the controller 51 at S120 judges that no long press has occurred, she returns S100 back, and if she judges that a long press has been made, she goes along S130 continued.

at S130 activates the controller 51 the special forward rotation control as the control executed in the first special mode, and deactivates the special reverse rotation control as the control executed in the second special mode. Then the controller switches 51 , as in 6 (e) shown, the reverse rotation LED 65c and leaves the three LEDs of the speed indicator section 64 , the special mode LED 65a and the forward turn LED 65b to shine. This indicates that the operation mode is in the special mode and that the special forward rotation control is activated and the special reverse rotation control is disabled. The deactivated state of the special reverse rotation control is a state in which, as the control executed in the second special mode, the reverse rotation control is selected and set.

At this time, as the speed set value, the high speed set value is selected, the controller drives 51 the engine 4 in the reverse rotation control with the high speed set value in the reverse direction. The reverse rotation control is a control in which the engine 4 is driven in accordance with the Drehzahleinstellwert, wherein the speed setting is not as in the case of the normal mode according to an operation of the selection switch 63 is changed by the user, but the speed setting is fixed.

Then the controller judges 51 at S140 whether the selector switch 63 briefly pressed by the user. When the controller 51 at S140 judges that a short press has occurred, it terminates the special mode setting processing and returns S10 back, and if she judges that no short press has occurred, she goes with S150 continued.

at S150 judges the controller 51 whether the selector switch 63 long pressed by the user. When the controller 51 at S150 judges that no long press has occurred, she returns S130 back, and when she judges that a long press has been made, she drives away S160 continued.

at S160 deactivates the controller 51 the special forward rotation control as the control executed in the first special mode, and activates the special reverse rotation control as the control executed in the second special mode. Then the controller switches 51 , as in 6 (f) shown, the forward turn LED 65b off, leaves the reverse rotation LED 65c light up and leave the three LEDs of the speed indicator section 64 , the special mode LED 65a and the reverse rotation LED 65c to shine. This indicates that the operation mode is in the special mode and that the special forward rotation control is disabled and the special reverse rotation control is activated. The deactivated state of the special forward rotation control is a state in which, as the control executed in the first special mode, the forward rotation control is selected and set.

At this time, as the speed set value, the high speed set value is selected, the controller drives 51 the engine 4 in the forward rotation control with the high speed set value in the forward rotation direction. The forward rotation control is a control in which the engine 4 is driven in accordance with the Drehzahleinstellwert, wherein the speed setting is not as in the case of the normal mode according to an operation of the selection switch 63 is changed by the user, but the speed setting is fixed.

Then the controller judges 51 at S170 whether the selector switch 63 briefly pressed by the user. When the controller 51 at S170 judges that a short press has occurred, it terminates the special mode setting processing and returns S10 back, and if she judges that no short press has occurred, she goes with S180 continued.

at S180 judges the controller 51 whether the selector switch 63 long pressed by the user. When the controller 51 at S180 judges that no long press has occurred, she returns S160 back, and when she judges that a long press has occurred, she returns S100 back.

As described above, when the operation mode is switched to the normal mode, by briefly pressing the selection switch 63 by the user the speed setting of the motor 4 and the operating mode is switched from normal mode to special mode. When the operation mode is in the special mode and the user selects the selector switch 63 short press, the operating mode is switched from the special mode to the normal mode. When the operation mode is in the special mode and the user selects the selector switch 63 long press, the setting of the control executed in the first special mode and the setting of the control executed in the second special mode are executed. The setting state of the forward rotation control and the setting state of the reverse rotation control are displayed simultaneously.

Special reverse rotation motor drive processing

Hereinafter, with reference to the flowchart 7 one from the controller 51 is executed by the case where the direction of rotation is set in the reverse direction and the special reverse rotation control is activated. Since the motor drive processing by the control device 51 in the case where the operation mode is set to the normal mode, and when the control executed in the second special mode is set to the reverse rotation control, its description will be omitted. In the 7 shown special reverse rotation motor drive processing is a processing that the controller 51 performs, for example, if with a at the attachment portion 19 attached nut a tightening element is released. The control device 51 starts with the present processing when the direction of rotation is set in the reverse direction and the special reverse rotation control is activated, and repeatedly executes the present processing in a set cycle.

First, the controller judges 51 at S200 whether the trigger switch 21 is operated by the user and is turned on or not. When the controller 51 at S200 judges that the trigger switch 21 is turned on, it assesses S210 Whether a brake command flag is detected or not.

When the controller 51 at S210 judges that no brake command flag is detected, it drives with S220 continued. The brake command flag means that the engine 4 is immediately stopped, and is set by means of an auto stop detection processing described below. Detecting the flag means detecting a value other than "0" for the flag.

at S220 judges the controller 51 Whether a reverse-rotation auto-stop flag is detected, and if it judges that the reverse-rotation auto-stop flag is not detected, drives with it S230 continued. The reverse rotation auto-stop flag means that during a reverse rotation of the engine 4 an auto stop operation (ie, an automatic stop operation) is executed, and it is set in the auto stop detection processing described below.

at S230 calculates the controller 51 the duty cycle of the six switching elements of the three-phase converter 52 , Then the controller gives 51 the control signals corresponding to the calculated duty cycle to the three-phase converter 52 off and drives the engine 4 on. In the present embodiment, the speed setting value of the motor is 4 in the special reverse rotation control until the tightening element is released, the high speed setting value. Therefore, the controller calculates 51 the duty DU1 according to the high speed setting. When the duty cycle is long, that takes the motor 4 supplied electric power to and the output power of the engine 4 rises. After running from S230 ends the control device 51 the present processing.

When the controller 51 at S220 judges that the reverse rotation auto-stop flag is detected, it goes along S240 continued. at S240 holds the control device 51 the supply of electrical energy to the engine 4 and puts the engine 4 in a freewheeling state. Specifically, all six switching elements of the three-phase converter 52 switched off. This reduces the speed of the motor 4 , After running from S160 ends the control device 51 the present processing.

When the controller 51 at S210 judges that the brake command flag is detected, and at S200 judges that the trigger switch 21 is not switched on (that is, switched off), it moves on S250 continued. at S250 guides the controller 51 a brake control off to the engine 4 slow down, so the engine 4 stops. Specifically, it controls the switching on / off of the six switching elements of the three-phase converter 52 so that the engine 4 works as a generator. After running from S250 ends the control device 51 the present processing.

Auto Stop detection processing

Next, referring to the flowchart of FIG 8th one from the controller 51 Auto stop detection processing is described based on the case where the direction of rotation is set in the reverse direction and the special reverse rotation control is activated. The control device 51 starts with the present processing when the direction of rotation is set in the reverse direction and the special reverse rotation control is activated, and repeatedly executes the present processing in a set cycle. The control device 51 performs in parallel with the special reverse rotation motor drive processing 7 for example, in the form of multitasking the present processing.

First, the controller judges 51 at S300 whether the trigger switch 21 is operated by the user and is turned on or not. When the controller 51 at S300 judges that the trigger switch 21 not switched on, that is switched off, it drives with S310 continued. at S310 raises the control device 51 the reverse rotation auto-stop flag and the brake command flag. After running from S310 ends the control device 51 the present processing.

When the controller 51 at S300 however, judges that the trigger switch 21 is switched on, it drives with S320 continued. at S320 judges the controller 51 , whether within a specified start evaluation period T1 since the start of the engine 4 , So since the beginning of the drive a speed change of the engine 4 was recorded. In the present embodiment, the start judgment period is T1 100 ms. Specifically, the controller performs 51 at S320 a processing for detecting a speed change by observing the engine speed (ie, a processing for detecting an extreme value of the engine speed) and judges whether this speed change within the start judgment period T1 since the start of the engine 4 was recorded. The speed change includes both a decreasing change and an increasing change.

When the controller 51 at S320 judges that the speed change within the start judgment period T1 since the start of the engine 4 is detected, it detects the generation of a strike and drives with S330 continued. at S330 judges the controller 51 , whether within a defined evaluation period T2 Since the last detection of a speed change, a change in the speed of 100 rpm or more has taken place. In the present embodiment, the evaluation period is T2 shorter than the start evaluation period T1 and is 50 ms. Specifically, the controller performs 51 at S330 processing to detect a decreasing change of 100 rpm or more or an increasing change of 100 rpm or more, and judged whether within the evaluation period T2 a speed change has been detected since the last acquisition.

When the controller 51 at S330 judges that within the assessment period T2 a speed change has been detected, it ends the present processing. When the controller 51 at S330 judges that no speed change within the evaluation period T2 was recorded, so that despite the lapse of the evaluation period T2 No speed change has occurred, it detects that no impact by the working section 6 took place and thus solved the previously fixed tightening element, and drives with S340 continued. A strike in the present embodiment is a hammer strike 14 on the anvil 15 ,

at S340 sets the controller 51 the reverse rotation auto-stop flag. Then, at S350 , counts the controller 51 the edges of the Hall sensor signal H. Concretely increases the control device 51 with each occurrence of an edge of the Hall sensor signals H, the Hall sensor count, which is a count value for the edges of the Hall sensor signals H.

Then the controller judges 51 at S360 Whether the Hall sensor count has reached a preset setpoint Ns or not. When the controller 51 at S360 judges that the Hall sensor count has not reached the target value Ns, it ends the present processing. When the controller 51 at S360 on the other hand, judges that the Hall sensor count has reached the set value Ns, it will go with it S370 continued. When the controller 51 at S320 judges that no speed change within the start judgment period since the start of the engine 4 she is also driving along S370 continued.

at S370 sets the controller 51 the brake command flag and then terminates the present processing.

Operation of the special reverse rotation control

Next, referring to 9 the effect described by performing the special reverse rotation control by the controller 51 is achieved. When the controller 51 the processing of S230 performs the drive of the engine 4 started. Since the tightening element is fixed to the tightening object, at the beginning of the drive of the motor 4 at a time t1, the first strike by the working section 6 generated. When the flip tab sections 17 . 17 of the hammer 14 on the beater arms 18 . 18 of the anvil 15 meet, start, the bats 18 . 18 to overcome (ie at the beginning of the first stroke), the engine speed reaches a maximum value. When the flip tab sections 17 . 17 the beating arms 18 . 18 overcome (ie at the end of the first stroke), the engine speed reaches its lowest value. When the flip tab sections 17 . 17 that the beating arms 18 . 18 have overcome, again on the beating arms 18 . 18 hit (ie at the beginning of the next stroke), the engine speed reaches its maximum again. This process is repeated between time t1 and time t2, a period of time that lasts until the tightening element has released and stops bouncing, with the maximum engine speed within each assessment period T2 occurs.

Where is the start evaluation period T1 set to a slightly longer time (for example 100 ms) than for the time from the start of the engine 4 to is expected for the first time reaching the maximum value of the engine speed (ie until the beginning of the first beat). The expected value is a design-based expected value. The evaluation period T2 is set to a slightly longer time (for example, 50 ms) than the time interval expected for repeated beats between engine speed maximums (ie the time interval between engine speed changes).

If, at time t2, the tightening element has released and no more bumps occur, the reverse rotation auto-stop flag is set. When the reverse rotation auto-stop flag is set, the engine enters 4 in the freewheeling state, and the Hall sensor count is started. While the engine 4 in the freewheeling state, the tightening element is due to the inertial rotation of the motor 4 further resolved. Therefore, the user does not need to solve the tightening element by hand.

When the Hall sensor count reaches the set value Ns at time t3, the brake command flag is set, the brake control is executed, and the engine 4 is stopped. The target value Ns is set to a value at which the brake control started and the engine 4 is stopped before the tightening element such as a nut falls from a screw. Therefore, the user does not have to pay attention to a possible drop of the tightening element while working.

In addition, the control device 51 be designed such that they the start judgment period T1 and the assessment period T2 in each case, for example, according to the battery voltage, that is, the voltage of the power source, variably sets. For example, the control device 51 the start evaluation period T1 and the assessment period T2 The lower the battery voltage, the smaller (shorter) the setting.

Special forward rotation motor drive processing

Next, referring to the flowchart of FIG 10 one from the controller 51 is executed by the case where the direction of rotation is set in the forward direction of rotation and the special forward rotation control is activated. As the motor drive processing, by control device 51 in the case where the operation mode is set to the normal mode, and when the control executed in the first special mode is set to the forward rotation control, its description will be omitted. In the 10 shown special forward rotation motor drive processing is a processing that the controller 51 performs, for example, if with a at the attachment portion 19 attached nut a suit element is attracted to a suit object. The control device 51 starts with the present processing when the direction of rotation is set in the forward direction of rotation and the special forward rotation control is activated, and repeatedly executes the present processing in a set cycle.

First, the controller judges 51 at S400 whether the trigger switch 21 is operated by the user and is turned on or not. When the controller 51 at S400 judges that the trigger switch 21 is switched on, it drives with S410 continued.

at S410 judges the controller 51 Whether a touch detection flag is detected or not. When the controller 51 judges that no tag detection flag is detected, it goes along S420 and, if it judges that a touch detection flag is detected, it will continue S430 continued. The touch detection flag means that touchdown of the tightening member on the tightening object is detected, and it is set in a touch detection processing described below.

at S420 calculates the controller 51 the duty cycle of the six switching elements of the three-phase converter 52 , Then the controller gives 51 the control signals corresponding to the calculated duty cycle to the three-phase converter 52 off and drives the engine 4 on. In the present embodiment, in the special forward rotation control, the speed setting value of the motor is 4 until detection of the setting of the high-speed set value. Therefore, the controller calculates 51 the duty DU1 according to the high speed setting.

at S430 however, the controller calculates 51 a duty ratio DU2 which is shorter than the duty ratio DU1, and outputs the control signals corresponding to the calculated duty ratio to the three-phase inverter 52 off and drives the engine 4 on. In the present embodiment, in the special forward rotation control, the speed setting value of the motor is 4 after detecting the setting of the set value for medium speed. Therefore, the controller calculates 51 the duty DU2 according to the set value for medium speed.

When the controller 51 at S400 judges that the trigger switch 21 is switched off, she goes with S440 continued. at S440 guides the controller 51 the brake control stops and stops the engine 4 and ends the present processing.

Bouncing identification processing

Next, referring to the flowchart of FIG 11 that of the controller 51 described landing recognition processing is described based on the case that the rotation direction is set to the forward rotation direction and the special forward rotation control is activated. The control device 51 starts with the present processing when the direction of rotation is set in the forward direction of rotation and the special forward rotation control is activated, and repeatedly executes the present processing in a set cycle. The control device 51 performs in parallel with the special forward rotation motor drive processing 10 for example, in the form of multitasking the present processing.

First, the controller judges 51 at S500 whether the trigger switch 21 is operated by the user and is turned on or not. When the controller 51 at S500 judges that the trigger switch 21 is switched off, she goes with S510 continued. at S510 raises the control device 51 the touch detection flag. After running from S510 ends the control device 51 the present processing.

When the controller 51 at S500 however, judges that the trigger switch 21 is switched on, it drives with S520 continued. at S520 judges the controller 51 , whether within the evaluation period T2 a change in speed of 100 rpm or more has taken place. In the present embodiment, the evaluation period is T2 50 ms. Specifically, the controller performs 51 at S520 as well as at S330 out 8th processing to detect the speed change and judges whether within the judgment period T2 a speed change was detected.

When the controller 51 at S520 judges that within the assessment period T2 no speed change has been detected, it ends the present processing. When the controller 51 against it S520 judges that within the assessment period T2 a speed change was detected, it detects that a blow through the working section 6 was generated, so the tightening element has placed on the suit object, and drives with S530 continued.

at S530 sets the controller 51 the touch detection flag and ends the present processing.

Operation of the special forward rotation control

Next, referring to 12 the operation described when the special forward rotation control by means of the control device 51 is performed. When the controller 51 the processing of S420 performs the drive of the engine 4 started with the duty cycle DU1. At the time t11 By applying the tightening element, a load acts on the motor 4 on, so that the engine speed decreases. If the tightening element at the time t12 on the tightening object, a torque is applied to the anvil 15 that is equal to or greater than the specified value, which causes the first strike of the work section 6 starts.

At the time t13 ends the stroke of the work section 6 , and generating the beat by the working section 6 is recorded. Then the duty cycle is reduced to DU2 and the engine speed decreases. Until the user releases the trigger 21 turns off, becomes the engine 4 driven with the duty cycle DU2. When the tightening element has been placed on the tightening object, the engine speed is automatically reduced to prevent excessive tightening of the tightening element. Therefore, the user can comfortably carry out the tightening work.

effect

1. (1) Die Betriebsmodi des Motors 4 umfassen einen Spezialmodus und einen Normalmodus, wobei der Spezialmodus einen ersten Spezialmodus, der selektiv eine Spezialvorwärtsdrehungssteuerung oder eine Vorwärtsdrehungssteuerung ausführen kann, und einen zweiten Spezialmodus umfasst, der selektiv eine Spezialrückwärtsdrehungssteuerung oder eine Rückwärtsdrehungssteuerung ausführen kann. Die Spezialvorwärtsdrehungssteuerung ist eine Steuerung, bei welcher der Motor bis zum Aufsetzen des Anzugselements auf dem Aufsetzobjekt mit relativ hoher Drehzahl angetrieben wird und nach dem Aufsetzen mit relativ niedriger Drehzahl angetrieben wird. Dadurch kann der Anziehvorgang des Anzugselements gleichmäßig durchgeführt werden, und ein übermäßiges Anziehen des Anzugselements kann unterbunden werden. Die Spezialrückwärtsdrehungssteuerung ist eine Steuerung, bei welcher der Motor bis zum Lösen des Anzugselements mit relativ hoher Drehzahl angetrieben wird und nach dem Lösen mit relativ niedriger Drehzahl angetrieben wird. Dadurch kann der Lösevorgang des Anzugselements gleichmäßig durchgeführt werden, und ein übermäßiges Lösen des Anzugselements kann unterbunden werden. Daher kann durch das elektrisch angetriebene Werkzeug 1 eine ausgezeichnete Benutzungsfreundlichkeit in einer Arbeitsumgebung erreicht werden, in der Anzugselemente sowohl gelöst als auch angezogen werden.
2. (2) Da bei dem elektrisch angetriebenen Werkzeug 1 die Benutzung unter Umschalten zwischen dem Normalmodus und dem Spezialmodus möglich ist, kann eine noch höhere Benutzungsfreundlichkeit erreicht werden.
3. (3) Mit dem elektrisch angetriebenen Werkzeug 1 können, wenn der Betriebsmodus in den Spezialmodus geschaltet ist, die im ersten Spezialmodus ausgeführte Steuerung und die im zweiten Spezialmodus ausgeführte Steuerung separat ausgewählt und eingestellt werden. Daher ist auch eine geeignete Anpassung an eine Arbeitsumgebung möglich, bei der nur eins von einem übermäßigen Anziehen und übermäßigen Lösen des Anzugselements unterbunden werden soll. Gemäß dem elektrisch angetriebenen Werkzeug 1 kann somit in verschiedenen Arbeitsumgebungen eine ausgezeichnete Benutzungsfreundlichkeit erreicht werden.
4. (4) Gemäß dem elektrisch angetriebenen Werkzeug 1 kann, wenn der Betriebsmodus in den Spezialmodus geschaltet ist, entsprechend der durch den Vorwärts/Rückwärts-Schalter 22 festgelegten Drehrichtung die für den ersten Spezialmodus ausgewählte Steuerung oder die für den zweiten Spezialmodus ausgewählte Steuerung ausgeführt werden.
5. (5) Da der Einstellungszustand der für den ersten Spezialmodus und für den zweiten Spezialmodus ausgewählten Steuerung gleichzeitig angezeigt wird, kann der Benutzer das elektrisch angetriebene Werkzeug unter Prüfung beider Einstellungszustände zugleich benutzen.
6. (6) Der Auswahlschalter 63 kann sowohl zum Auswählen des Drehzahleinstellwerts, wenn der Betriebsmodus in den Normalmodus geschaltet ist, als auch zum Auswählen der im ersten Spezialmodus und im zweiten Spezialmodus ausgeführten Steuerung verwendet werden, wenn der Betriebsmodus in den Spezialmodus geschaltet ist. Dies reduziert die Anzahl der Schalter und spart somit Installationsraum für den Einstellabschnitt 24 am elektrisch angetriebenen Werkzeug 1.
7. (7) Der Auswahlschalter 63 dient auch zum Umschalten des Betriebsmodus. Daher muss kein gesonderter Schalter zum Umschalten des Betriebsmodus vorgesehen sein. Somit kann an dem elektrisch angetriebenen Werkzeug 1 weiterer Installationsraum für den Einstellabschnitt 24 eingespart werden.
8. (8) Indem der Benutzer die Betätigungsdauer des Auswahlschalters 63 ändert, kann er zwischen der Benutzungen des Auswahlschalters 63 zum Auswählen des Drehzahleinstellwert, zum Auswählen der im ersten Spezialmodus und im zweiten Spezialmodus ausgeführten Steuerung und zum Umschalten des Betriebsmodus unterscheiden.

According to the first embodiment described above, the following effects can be obtained.

1. (1) The operating modes of the engine 4 include a special mode and a normal mode, wherein the special mode includes a first special mode that can selectively perform a special forward rotation control or a forward rotation control, and a second special mode that can selectively perform a special reverse rotation control or a reverse rotation control. The special forward rotation control is a control in which the motor is driven at a relatively high speed until the tightening element is set on the landing gear and driven at relatively low speed after landing. This allows the Tightening operation of the tightening element can be performed evenly, and excessive tightening of the tightening element can be suppressed. The special reverse rotation control is a control in which the motor is driven at a relatively high speed until the tightening member is released and driven at a relatively low speed after being released. Thereby, the releasing operation of the tightening member can be smoothly performed, and excessive loosening of the tightening member can be suppressed. Therefore, by the electrically driven tool 1 excellent user-friendliness can be achieved in a work environment in which tightening elements are both loosened and tightened.
2. (2) Since the electrically driven tool 1 the use of switching between the normal mode and the special mode is possible, an even greater user-friendliness can be achieved.
3. (3) With the electrically driven tool 1 When the operation mode is set to the special mode, the control performed in the first special mode and the control executed in the second special mode can be separately selected and set. Therefore, a suitable adaptation to a work environment is possible in which only one of an excessive tightening and excessive release of the tightening element should be prevented. According to the electrically driven tool 1 Thus, excellent user-friendliness can be achieved in various work environments.
4. (4) According to the electrically driven tool 1 can, when the operation mode is switched to the special mode, according to the by the forward / reverse switch 22 the direction selected for the first special mode or the control selected for the second special mode.
5. (5) Since the setting state of the control selected for the first special mode and for the second special mode is displayed at the same time, the user can simultaneously use the power tool while checking both setting states.
6. (6) The selector switch 63 may be used both for selecting the speed setting value when the operation mode is switched to the normal mode and for selecting the control executed in the first special mode and the second special mode when the operation mode is in the special mode. This reduces the number of switches and thus saves installation space for the adjustment section 24 on the electrically driven tool 1 ,
7. (7) The selector switch 63 also serves to switch the operating mode. Therefore, no separate switch for switching the operating mode must be provided. Thus, on the electrically powered tool 1 additional installation space for the adjustment section 24 be saved.
8. (8) By the user, the operation time of the selection switch 63 he can switch between the uses of the selector switch 63 to select the speed set value, to select the control executed in the first special mode and in the second special mode, and to switch the operating mode.

Second embodiment

Differences from the first embodiment

The basic structure of the second embodiment is the same as that of the first embodiment, therefore, the description of the same elements is omitted and the description focuses on the differences. The same reference numerals as in the first embodiment denote the same elements, and their description can be found in the foregoing.

In the first embodiment described above, at the lower portion of the grip portion 3 the adjustment section 24 intended. The second embodiment, however, differs from the first embodiment in that at the lower portion of the handle portion 3 an adjustment section 24A is provided.

The adjustment section 24A includes, as in 13 shown the selector switch 63 , a quick switch 66 , the speed display section 64 and a special mode display section 69 , The quick switch 66 is as well as the selector switch 63 a key-type switch adapted to be press-operated by the user. As in 2 Shown by the broken line is the quick switch 66 with the control device 51 connected. The special mode display section 69 includes a first forward turn LED 67a , a second forward turn LED 67b , a first reverse rotation LED 68a and a second reverse rotation LED 68b ,

That is, the adjustment section 24A includes differently than the adjustment section 24 the first embodiment, which includes a switch, two switches. In the second embodiment, therefore, a setting processing that differentiates the control device 51 in response to the switch operation by the user, from the setting processing performed by the controller 51 in the first embodiment in response to the switch operation by the user. The following is a description of the setting processing according to the second embodiment. In the present embodiment, the selection switch corresponds 63 the Selection control section and the quick switch 66 the mode control section. The special mode display section 69 corresponds to the setting display section and the information display section.

processing

setting processing

Next, referring to the flowchart of FIG 14 one from the controller 51 executed setting processing described. The control device 51 begins with the execution of the adjustment processing when the trigger switch 21 is turned on.

at S600 guides the controller 51 first, a normal mode setting processing. The normal mode setting processing will be described in detail below. Upon completion of the normal mode setting processing, the controller moves 51 With S610 continued.

at S610 the controller judges 51 whether by the operation of the forward-backward switch 22 the direction of rotation of the motor 4 was set in the forward direction of rotation or the reverse direction of rotation. When the direction of rotation of the motor 4 was set in the forward direction of rotation, the controller moves 51 With S620 continued. at S620 guides the controller 51 a first special mode setting processing. Upon completion of the first special mode setting processing, the controller returns 51 to S600 back. The first special mode setting processing will be described in detail below.

When the direction of rotation of the motor 4 on the other hand, it has been set to the reverse direction, the controller moves 51 With S630 continued. at S630 guides the controller 51 a second special mode setting processing. Upon completion of the second special mode setting processing, the controller returns 51 to S600 back. The second special mode setting processing will be described in detail below.

Normalmoduseinstellverarbeitung

Next, referring to the flowchart of FIG 15 that of the controller 51 executed Normalmoduseinstellverarbeitung described.

at S700 turns on the controller 51 First change the operating mode to normal mode and set the speed mode to L mode. That is, the controller 51 selects as the speed setting of the motor 4 the low speed setpoint. The control device 51 leaves the L-speed LED 64a come on.

Then the controller judges 51 at S710 , whether an operation of the quick switch 66 is done by the user, so whether the user the quick switch 66 pressed or not. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S720 continued.

at S720 judges the controller 51 then, whether an operation of the selection switch 63 is done by the user, so whether the user select the switch 63 pressed or not. When the selector switch 63 has not been pressed, the controller returns 51 to S700 back. When the selector switch 63 on the other hand, the control device moves 51 With S730 continued.

at S730 represents the controller 51 set the speed mode to M mode. That is, the controller 51 selects as the speed setting of the motor 4 the set value for medium speed off. The control device 51 leaves in addition to the L-speed LED 64a the M-speed LED 64b come on.

Then, at S740 , judges the controller 51 , whether an operation of the quick switch 66 done by the user. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S750 continued.

at S750 judges the controller 51 whether an operation of the selector switch 63 done by the user. When the selector switch 63 has not been pressed, the controller returns 51 to S730 back. When the selector switch 63 on the other hand, the control device moves 51 With S760 continued.

In S760 represents the controller 51 set the speed mode to H mode. That is, the controller 51 selects as the speed setting of the motor 4 the set value for high speed off. The control device 51 leaves in addition to the L-speed LED 64a and to the M-speed LED 64b the H-speed LED 64c come on.

Then, at S770 , judges the controller 51 , whether an operation of the quick switch 66 done by the user. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S780 continued.

at S780 judges the controller 51 whether an operation of the selector switch 63 done by the user. When the selector switch 63 has not been pressed, the controller returns 51 to S760 back. When the selector switch 63 on the other hand, the control device returns 51 to S700 back.

As described above, when the operation mode is switched to the normal mode, by operation of the selection switch 63 changed by the user of the speed setting. When the operation mode is set to the normal mode, pressing the quick switch 66 the normal mode setting processing is ended by the user and the first special mode setting processing or the second special mode setting processing is started. When the operation mode is switched to the normal mode, thus, by operating the quick switch 66 switched by the user from the operating mode from the normal mode to the special mode.

First special mode setting processing

Next, referring to the flowchart of FIG 16 that of the controller 51 executed first Spezialmoduseinstellverarbeitung described.

First, the controller switches 51 at S800 sets the operation mode to special mode and, as the control executed in the first special mode, activates the special forward rotation control. Then the controller selects 51 as the speed setting value after the touch detection of putting on of the tightening element on the tightening object, the low speed setting value, and sets the speed setting value in calculating the duty ratio S430 in 10 to the set value for low speed. In the first embodiment, the speed set value after the touch detection is fixed to the middle speed set value, but in the second embodiment, the speed set value after the touch detection becomes the operation of the selection switch 63 changed by the user.

By at S800 The speed setting value is set to the low speed set value S430 a duty cycle DU3 calculated shorter than the duty cycle DU2 is. By setting the speed input value after the touch detection to the low speed set value, the tightening force of the tightening element after the touch detection becomes lower than the speed setting value in comparison with the setting of the rotation speed setting value.

The control device 51 leaves, as in 18 (a) shown, the first forward turn LED 67a and the second forward turn LED 67b come on. This indicates that the operation mode is in the special mode, the special forward rotation control is activated, and the tightening force of the tightening member after the touch detection is comparatively small.

Then the controller judges 51 at S810 , whether an operation of the quick switch 66 done by the user. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S820 continued.

at S820 judges the controller 51 whether an operation of the selector switch 63 done by the user. When the selector switch 63 has not been pressed, the controller returns 51 to S800 back. When the selector switch 63 on the other hand, the control device moves 51 With S830 continued.

at S830 chooses the controller 51 as the speed setting value after the touch detection of putting the tightening element on the tightening object, the set value for medium speed. Thus, the speed setting value in calculating the duty ratio becomes S430 out 10 the set value for medium speed. This will be added S430 as well as in the first embodiment, the duty cycle DU2 calculated according to the set value for medium speed. In this case, the tightening force of the tightening element after the attachment detection is higher than at S800 with the low speed set value as the speed setting value.

The control device 51 leaves, as in 18 (b) shown, the first forward turn LED 67a light up and switch on the second forward turn LED 67b out. This indicates that the operation mode is in the special mode, the special forward rotation control is activated, and the tightening force of the tightening member after the touch detection is comparatively high.

Then the controller judges 51 at S840 , whether an operation of the quick switch 66 done by the user. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S850 continued.

at S850 judges the controller 51 whether an operation of the selector switch 63 done by the user. When the selector switch 63 has not been pressed, the controller returns 51 to S830 back. When the selector switch 63 on the other hand, the control device moves 51 With S860 continued.

at S860 deactivates the controller 51 the special forward rotation control. That is, the controller 51 The control executed in the first special mode selects and sets the forward rotation control. The control device 51 switches, as in 18 (c) shown, the first forward turn LED 67a and leaves the first forward turn LED 67a and the second forward turn LED 67b switched off. This indicates that the special forward rotation control is disabled.

In the forward rotation control, the controller drives 51 the engine 4 according to the speed set value in the forward rotation direction selected in the normal mode setting processing. At this time, the speed setting value depends on which processing stage the normal mode setting processing has been completed and a transition to the first special mode setting processing has been made.

Then the controller judges 51 at S870 , whether an operation of the quick switch 66 done by the user. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S880 continued.

at S880 judges the controller 51 whether an operation of the selector switch 63 done by the user. When the selector switch 63 has not been pressed, the controller returns 51 to S860 back. When the selector switch 63 on the other hand, the control device returns 51 to S800 back.

As described above, when the direction of rotation of the motor 4 is set to the forward direction of rotation and the operation mode is switched to the special mode by operating the selection switch 63 changed by the user of the speed setting after the landing detection and changed the tightening force of the tightening element after the landing detection. When the direction of rotation of the motor 4 is set to the forward direction of rotation and the operating mode is set to the special mode, is activated by operating the quick switch 66 switched by the user from the operating mode from the special mode to the normal mode.

Second special mode setting processing

Next, referring to the flowchart of FIG 17 that of the controller 51 executed second Spezialmoduseinstellverarbeitung described.

First, the controller switches 51 at S900 sets the operation mode to special mode and activates the special reverse rotation control as the control executed in the second special mode. The control device 51 Sets the free-running time of the engine 4 after detecting the release of the tightening element comparatively short. That is, the controller 51 sets the setpoint Ns for S360 in 8th to a relatively small value. In the first embodiment, the free running time of the engine 4 set to a fixed value, but in the second embodiment, the free-running time of the engine 4 according to an operation of the selection switch 63 changed by the user.

By at S900 the free-running time of the engine 4 is set comparatively short, reduces the amount of movement of the tightening element after detecting the release of the tightening element in comparison to setting the comparatively long freewheeling duration.

The control device 51 leaves, as in 19 (a) shown the first reverse rotation LED 68a and the second reverse rotation LED 68b come on. This indicates that the operation mode is in the special mode, the special reverse rotation control is activated, and the amount of movement of the tightening member after detecting release of the tightening member is comparatively small.

Then the controller judges 51 at S910 , whether an operation of the quick switch 66 done by the user. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S920 continued.

at S920 judges the controller 51 whether an operation of the selector switch 63 done by the user. When the selector switch 63 has not been pressed, the controller returns 51 to S900 back. When the selector switch 63 on the other hand, the control device moves 51 With S930 continued.

at S930 represents the controller 51 the free-running time of the engine 4 after detecting the release of the tightening element comparatively long. That is, the controller 51 put that Setpoint Ns for S360 in 8th to a comparatively large value. Compared to setting a comparatively short freewheeling duration thereby increases the amount of movement of the tightening element after detecting the release of the tightening element.

The control device 51 leaves, as in 19 (b) shown the first reverse rotation LED 68a light up and switch on the second reverse rotation LED 68b out. This indicates that the operation mode is in the special mode, the special control is activated, and the amount of movement of the tightening member after detecting release of the tightening member is comparatively high.

Then the controller judges 51 at S940 , whether an operation of the quick switch 66 done by the user. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S950 continued.

at S950 judges the controller 51 whether an operation of the selector switch 63 done by the user. When the selector switch 63 has not been pressed, the controller returns 51 to S930 back. When the selector switch 63 on the other hand, the control device moves 51 With S960 continued.

at S960 deactivates the controller 51 the special reverse rotation control. That is, the controller 51 As the controller executed in the second special mode, selects and sets the reverse rotation control. The control device 51 switches, as in 19 (c) shown the first reverse rotation LED 68a and leaves the first reverse rotation LED 68a and the second reverse rotation LED 68b switched off. This indicates that the reverse rotation control is disabled.

In the reverse rotation control, the controller drives 51 the engine 4 according to the speed set value in the reverse direction selected in the normal mode setting processing. At this time, the speed setting value depends on which processing stage the normal mode setting processing has been completed and a transition to the second special mode setting processing has been made.

Then the controller judges 51 at S970 , whether an operation of the quick switch 66 done by the user. When the quick switch 66 has been pressed, terminates the control device 51 the present processing. When the quick switch 66 on the other hand, has not been pressed, drives the controller 51 With S980 continued.

at S980 judges the controller 51 whether an operation of the selector switch 63 done by the user. When the selector switch 63 has not been pressed, the controller returns 51 to S960 back. When the selector switch 63 on the other hand, the control device returns 51 to S900 back.

As described above, when the direction of rotation of the motor 4 is set in the reverse direction and the operation mode is switched to the special mode by operating the selection switch 63 changed by the user, the free-running time after detecting the release of the tightening element and changed the amount of movement of the tightening element after detecting the release of the tightening element. When the direction of rotation of the motor 4 is set to the reverse direction and the operation mode is set to the special mode, by operating the quick switch 66 switched by the user from the operating mode from the special mode to the normal mode.

At this time, the setting state of the controller executed in the first special mode and the setting state of the controller executed in the second special mode are simultaneously displayed. In addition, when the special forward rotation control is activated, information on the tightening force of the tightening element is displayed, and when the special reverse rotation control is activated, information about the movement amount of the tightening element is also displayed.

effect

According to the second embodiment described above, in addition to the effects ( 1 ) to ( 8th ) of the first embodiment achieves the following effects.

(9) The electrically driven tool 1 has two switches, namely the selector switch 63 and the quick switch 66 , By operating the two switches, the user can thus easily select the speed setting, select the controls executed in the first special mode and the second special mode and switch the operating mode.

(10) Since according to an operation of the selector switch 63 can be changed by the user, the tightening force of the tightening element according to the Aufsetzerkennung and the value in relation to the amount of movement of the tightening element after detecting the release of the tightening element can the ease of use of the electrically powered tool 1 be further increased.

(11) Information about the tightening force of the tightening element after the landing detection and information about the moving amount of the tightening element can be displayed after detecting the detachment of the tightening element. Therefore, the user can use the electrically powered tool 1 check the tightening force and the movement dimension.

Third embodiment

Differences from the first embodiment

The basic structure of the third embodiment is the same as that of the first embodiment, therefore, the description of the same elements will be omitted and the description will focus on the differences. The same reference numerals as in the first embodiment denote the same elements, and their description can be found in the foregoing.

In the above-described first embodiment, when the rotational direction is set in the forward rotational direction and the special forward rotation control is activated, the touch detection processing is performed in parallel with the special forward rotation motor drive processing, but the third embodiment is different in that stroke detection processing is performed in parallel with the special forward rotation motor drive processing. Hereinafter, the special forward rotation motor drive processing and the stroke detection processing described in the third embodiment by the control device will be described 51 be executed.

processing

Special forward rotation motor drive processing

First, referring to the flowchart 20 that of the controller 51 is executed by the case where the direction of rotation is set in the forward direction of rotation and the special forward rotation control is activated. In the 20 shown special forward rotation motor drive processing is a processing that the controller 51 performs, for example, if with a at the attachment portion 19 attached nut a suit element is attracted to a suit object. The control device 51 starts with the present processing when the direction of rotation is set in the forward direction of rotation and the special forward rotation control is activated, and repeatedly executes the present processing in a set cycle.

First, the controller performs 51 at S15 and S55 the same processing as at S400 and S440 out 10 out. Then the controller judges 51 at S25 whether a stroke detection flag is detected or not. When the controller 51 judges that no stroke detection flag is detected, it goes along S35 and if she judges that a stroke detection flag is detected, she goes along S45 continued. The stroke detection flag means that the tightening load increases and a stroke of the work section 6 is detected, and it is set in the stroke recognition processing described below.

at S35 calculates the controller 51 the duty cycle of the six switching elements of the three-phase converter 52 and outputs the control signals corresponding to the calculated duty cycle to the three-phase converter 52 off and drives the engine 4 on. In the present embodiment, in the special forward rotation control, until the detection of a shock as the speed setting value, the low speed set value or the middle speed set value is selected. Therefore, the controller calculates 51 the duty cycle DUA according to the low speed set value or the middle speed set value. After the processing of S35 ends the control device 51 the present processing.

at S45 however, the controller calculates 51 a duty ratio DUB which is longer than the duty DUA, and outputs the duty signals corresponding to the duty ratio to the three-phase inverter 52 off and drives the engine 4 on. When the controller 51 at S35 has calculated duty cycle DUA corresponding to the low-speed set value, it calculates duty ratio DUB corresponding to the middle-speed set value or the high-speed set value. When the controller 51 at S35 has calculated duty cycle DUA corresponding to the average speed set value, it calculates duty ratio DUB corresponding to the high speed set value. Thus, while in the first embodiment the tightening force is reduced in response to the increase in the tightening load, the tightening force in the third embodiment is increased in response to the increase in the tightening load. After the processing of S45 ends the control device 51 the present processing.

Breakdown detection processing

Next, referring to the flowchart of FIG 21 the of the control device 51 is performed based on the case where the direction of rotation is set in the forward direction and the special forward rotation control is activated. The control device 51 starts with the present processing when the direction of rotation is set in the forward direction of rotation and the special forward rotation control is activated, and repeatedly executes the present processing in a set cycle. The control device 51 performs in parallel with the special forward rotation motor drive processing 20 for example, in the form of multitasking the present processing.

First, the controller performs 51 at S105 the same processing as at S500 out 11 out. When the controller 51 at S105 judges that the trigger switch 21 is switched off, she goes with S115 continue, cancel the stroke detection flag and complete the present processing.

When the controller 51 at S105 however, judges that the trigger switch 21 is switched on, it drives with S125 and performs the same processing as in S520 out 11 out.

When the controller 51 at S125 judges that within the assessment period T2 No speed change has occurred, it ends the present processing. When the controller 51 against it S125 judges that within the assessment period T2 a speed change is made, it detects that a stroke of the working section 6 took place and drives away S135 continued. at S135 sets the controller 51 the stroke detection flag and ends the present processing.

Operation of the special forward rotation control

Next, referring to 22 the operation described when the special forward rotation control by means of the control device 51 is performed. 22 Fig. 15 shows an operation in the case where the stroke detection flag is set by detecting a beat twice. When the controller 51 the processing of S35 performs the drive of the engine 4 started with the duty cycle DUA. At the time t21 By applying the tightening element, a load acts on the motor 4 on, so that the engine speed decreases. At the time t22 increases the tightening load of the tightening element, and on the anvil 15 a torque is applied which is equal to or greater than the predetermined value, whereby the first stroke of the working section 6 starts.

At the time t23 the second stroke ends, the duty cycle increases from DUA to DUB and the engine speed increases. Until the user releases the trigger 21 turns off, becomes the engine 4 driven by the duty cycle DUB. That is, until the increase in the starting load at a comparatively low engine speed, the engine 4 driven, and in response to the increase in the starting load is the engine 4 automatically driven at a comparatively high engine speed. Thus, in a situation where attention is not paid to over-tightening, the user can conveniently perform the tightening of the tightening element by the control device 51 performs the special forward rotation control of the third embodiment.

In the third embodiment, instead of the adjustment section 24 also the adjustment section 24A be selected in the second embodiment. In this case, in the special control controller, the tightening force after the shock detection can be changed in accordance with an operation of the selector switch 63 be changed by the user.

Further embodiments

1. (a) In den oben beschriebenen Ausführungsformen wird ein Schlag des Arbeitsabschnitts 6 anhand einer Veränderung der Motordrehzahl erfasst, doch ist die vorliegende Offenbarung nicht darauf beschränkt. Beispielsweise kann ein Schlag des Arbeitsabschnitts 6 anhand einer Veränderung des im Motor 4 fließenden Stroms erfasst werden, oder ein Schlag kann unter Verwendung eines Schlagsensors wie etwa eines Spannungssensors oder Beschleunigungssensors oder dergleichen erfasst werden. Ein Schlag kann auch unter Verwendung eines Mikrofons oder dergleichen zum Erfassen eines Schlaggeräuschs erfasst werden.
2. (b) In den oben beschriebenen Ausführungsformen wird bei der Spezialrückwärtsdrehungssteuerung der Motor 4 nach dem Erfassen des Lösens des Anzugselements über einen Freilauf angehalten, doch kann der Motor 4 auch ohne Durchlaufen eines Freilaufs angehalten werden. In den oben beschriebenen Ausführungsformen wird bei der Spezialvorwärtsdrehungssteuerung der Motor 4 nach dem Erfassen des Aufsetzens oder eines Schlags angetrieben, bis der Benutzer den Abzugsschalter 21 ausschaltet, doch kann der Motor 4 auch angehalten werden, nachdem er für eine festgelegte Zeit angetrieben wurde.
3. (c) In den oben beschriebenen Ausführungsformen werden am Einstellabschnitt 24, 24A Informationen zu der im ersten Spezialmodus ausgewählten Steuerung und Informationen zu der im zweiten Spezialmodus ausgewählten Steuerung gleichzeitig angezeigt, doch ist es auch möglich, entsprechend der festgelegten Drehrichtung des Motors 4 nur die Informationen zu der im ersten Spezialmodus ausgewählten Steuerung oder nur die Informationen zu der im zweiten Spezialmodus ausgewählten Steuerung anzuzeigen. Dadurch werden LEDs eingespart und es wird Anzeigeplatz eingespart.
4. (d) In der oben beschriebenen ersten Ausführungsform liegen die Anzugskraft nach der Aufsetzerkennung bei der Spezialvorwärtsdrehungssteuerung und das Bewegungsmaß des Anzugselements nach dem Erfassen des Lösens bei der Spezialrückwärtsdrehungssteuerung fest, doch können sie auch wie in der zweiten Ausführungsform gemäß einem Befehl des Benutzers geändert werden. In diesem Fall können die Anzugskraft und das Bewegungsmaß durch ein langes Drücken des Auswahlschalters 63 geändert werden.
5. (e) Der Arbeitsabschnitt 6 ist nicht darauf beschränkt, dass ein Hammer auf einen Amboss trifft, um einen Schlag zu erzeugen, und es kann sich auch um eine so genannte Öleinheit handeln, die derart aufgebaut ist, dass mithilfe von Hydraulikdruck, der durch eine relative Drehung des Gehäuses und der Spindel aufgebaut wird, ein Schlag auf die als Ausgabeabschnitt dienende Spindel ausgeübt wird. Der Schlag, den der Arbeitsabschnitt 6 auf den Ausgabeabschnitt ausübt, kann auch als Momentandrehmoment bezeichnet werden. Eine solche Öleinheit ist unter anderem in den ungeprüften japanischen Patentanmeldungen Nr. 2006-289596 , Nr. 2005-219139 und Nr. 2002-59371 offenbart.
6. (f) Das elektrisch angetriebene Werkzeug 1 ist nicht auf einen wiederaufladbaren Impulsschrauber beschränkt, und es kann sich beispielsweise auch um einen Schlagschrauber handeln, solange ein durch einen Motor angetriebener Arbeitsabschnitt 6 vorliegt. Der Motor 4 wurde als bürstenloser Drehstrommotor beschrieben, doch reicht es aus, wenn es sich um einen Motor handelt, mit dem der Arbeitsabschnitt 6 angetrieben werden kann. Das elektrisch angetriebene Werkzeug 1 ist nicht auf ein wiederaufladbares Werkzeug beschränkt und kann auch über ein Kabel mit elektrischer Energie versorgt werden.
7. (g) Mehrere Funktionen eines einzelnen Aufbauelements in den oben beschriebenen Ausführungsformen können auch durch mehrere Aufbauelemente erzielt werden, und eine einzelne Funktion eines einzelnen Aufbauelements kann auch durch mehrere Aufbauelemente erzielt werden. Auch können mehrere Funktionen, die durch mehrere Aufbauelemente erzielt werden, durch ein einzelnes Aufbauelement erzielt werden, und eine einzelne Funktion, die durch mehrere Aufbauelemente erzielt wird, kann durch ein einzelnes Aufbauelement erzielt werden. Auch kann ein Teil der Aufbauelemente der oben beschriebenen Ausführungsformen wegfallen. Auch kann wenigstens ein Teil des Aufbaus einer oben beschriebenen Ausführungsform den Aufbaue einer anderen oben beschriebenen Ausführungsform ergänzen oder ersetzen. Verschiedene Ausführungsformen, die ebenfalls innerhalb des technischen Gedankens liegen, der allein durch den Wortlaut der Patentansprüche bestimmt ist, gelten ebenfalls als Ausführungsformen der vorliegenden Offenbarung.
8. (h) Die vorliegende Offenbarung kann neben dem oben beschriebenen elektrisch angetriebenen Werkzeug auch in verschiedenen anderen Ausführungsformen umgesetzt werden, etwa durch ein System mit den Aufbauelementen des elektrisch angetriebenen Werkzeugs, ein Programm, das einen Computer, der eine Motorsteuerungsvorrichtung des elektrisch angetriebenen Werkzeugs bildet, Funktionen ausführen lässt, ein nicht transitorisches greifbares Speichermedium wie etwa ein Halbleiterspeicher, auf dem das Programm aufgezeichnet ist, ein Motorsteuerungsverfahren des elektrisch angetriebenen Werkzeugs oder dergleichen.

While embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, but may be variously modified.

1. (a) In the above-described embodiments, a stroke of the working portion 6 detected by a change in the engine speed, but the present disclosure is not limited thereto. For example, a strike of the work section 6 based on a change in the engine 4 flowing current, or a shock can be detected using a shock sensor such as a voltage sensor or acceleration sensor or the like. A shock may also be detected by using a microphone or the like for detecting a striking sound.
2. (b) In the above-described embodiments, in the special reverse rotation control, the motor becomes 4 stopped after detecting the release of the tightening element via a freewheel, but the engine can 4 be stopped without running through a freewheel. In the above-described embodiments, in the special forward rotation control, the motor becomes 4 driven after detecting the touch down or a blow until the user releases the trigger switch 21 turns off, but the engine can 4 also after being driven for a set time.
3. (c) In the above-described embodiments, at the setting section 24 . 24A Information about the controller selected in the first special mode and information on the controller selected in the second special mode is displayed simultaneously, but it is also possible according to the set direction of rotation of the motor 4 display only the information about the controller selected in the first special mode, or only the information of the controller selected in the second special mode. As a result, LEDs are saved and display space is saved.
4. (d) In the above-described first embodiment, the tightening force after the touch detection in the special forward rotation control and the movement amount of the tightening member are fixed after the release in the special reverse rotation control, but they can also be changed according to a command of the user as in the second embodiment. In this case, the tightening force and the movement amount can be achieved by a long press on the selector switch 63 be changed.
5. (e) The working section 6 is not limited to a hammer striking an anvil to produce a shock, and it may also be a so-called oil unit constructed by using hydraulic pressure generated by relative rotation of the housing and the housing Spindle is constructed, a blow is applied to the serving as an output section spindle. The blow that the working section 6 exerts on the output section, may also be referred to as immediate torque. One such oil equivalent is among others in the unaudited Japanese Patent Application No. 2006-289596 , No. 2005-219139 and no. 2,002 to 59,371 disclosed.
6. (f) The electrically driven tool 1 is not limited to a rechargeable pulse wrench, and it may, for example, also be an impact wrench, as long as a working section driven by a motor 6 is present. The motor 4 was described as a brushless three-phase motor, but it is sufficient, if it is a motor, with the working section 6 can be driven. The electrically powered tool 1 is not limited to a rechargeable tool and can also be powered by a cable with electrical energy.
7. (g) Multiple functions of a single constituent element in the above-described embodiments can also be achieved by a plurality of constituent elements, and a single function of a single constituent element can also be achieved by a plurality of constituent elements. Also, multiple functions achieved by a plurality of constituent elements can be achieved by a single constituent element, and a single function achieved by a plurality of constituent elements can be achieved by a single constituent element. Also, a part of the constituent elements of the above-described embodiments may be omitted. Also, at least part of the structure of an embodiment described above may supplement or replace the structure of another embodiment described above. Various embodiments, which are also within the technical scope of the invention, to be determined solely by the terms of the claims, are also considered to be embodiments of the present disclosure.
8. (h) The present disclosure may be implemented in various other embodiments in addition to the electrically driven tool described above, such as a system including the constitution members of the power tool, a program that includes a computer constituting a motor control apparatus of the power tool. Perform functions, a non-transitory tangible storage medium such as a semiconductor memory on which the program is recorded, a motor control method of the electrically driven tool or the like.

It is explicitly pointed out that all features disclosed in the description and / or the claims are considered separate and independent of each other for the purpose of original disclosure as well as for the purpose of limiting the claimed invention independently of the feature combinations in the embodiments and / or the claims should. It is explicitly stated that all range indications or indications of groups of units disclose every possible intermediate value or subgroup of units for the purpose of the original disclosure as well as for the purpose of restricting the claimed invention, in particular also as the limit of a range indication.

LIST OF REFERENCE NUMBERS

1:

electrically powered tool

2:

casing

3:

handle portion

4:

engine

5:

hammer housing

6:

working section

7:

spindle

8th:

ball-bearing

9:

Planetary gear mechanism

10:

Tool main body

11:

ring gear

12:

output shaft

13:

pinion

14:

hammer

15:

anvil

16:

spiral spring

17:

Shot lead section

18:

beater

19:

mounting portion

20:

shaft bearing

21:

trigger switch

22:

Forward-reverse switch

23:

Illumination LED

24, 24A:

adjusting

30:

battery Pack

40:

Motor driving device

51:

control device

52:

three-phase inverter

53:

Measuring resistive element

54:

amplifier

56:

Hall sensor

63:

selector switch

64:

Speed display section

64a:

L-speed LED

64b:

M-speed LED

64c:

H-speed LED

65, 69:

Special mode display section

65a:

Special Mode LED

65b:

Forward rotation LED

65c:

Reverse rotation LED

66:

Quick switch

67a:

first forward turn LED

67b:

second forward turn LED

68a:

first reverse rotation LED

68b:

second reverse rotation LED

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 3660554 [0003]
• JP 2006289596 [0183]
• JP 2005219139 [0183]
• JP 200259371 [0183]

Claims (12)

Electrically powered tool (1), comprising: a motor (4) adapted to rotate forwards and backwards, a power transmission portion configured to transmit the rotational force of the motor (4) to a tightening member; a front end work holding portion configured to hold the tightening member to an output shaft of the power transmission portion, and a control section (51) configured to control the rotation of the motor (4), wherein the control section (51) has a special mode as an operation mode for controlling the rotation of the motor (4), which is a first special mode, which is an operation mode in which the motor (4) is driven in a forward rotation direction, in which the tightening element is attracted to an object and includes a second special mode which is an operation mode in which the motor (4) is driven in a reverse direction opposite to the forward direction of rotation, and is adapted to perform at least one special forward rotation control in the first special mode the speed of the motor (4) is changed in response to an increase in the apply load, and in the second special mode, at least one special reverse rotation control can be performed in which the speed of the motor (4) is changed in response to the release of the tightened tightening element. Electrically driven tool (1) after Claim 1 wherein the control section (51) further comprises, as the operation mode, a normal mode that is an operation mode in which the motor (4) is driven according to a selected speed set value, and configured to switch the operation mode between the normal mode and the special mode. Electrically driven tool (1) after Claim 1 or 2 wherein, in the first special mode, the control section (51) can selectively execute one of the special forward rotation control and forward rotation control in which the motor (4) is driven in the forward direction according to a selected speed set value and selectively execute one of the special reverse rotation control and the reverse rotation control in the second special mode can be, in which the motor (4) is driven in the reverse direction in accordance with a selected Drehsaheinstellwert, and is designed for separate execution, such that when the operating mode is switched to the special mode, one of the special forward rotation control and the forward rotation control than that in the first special mode is selected and set, and separately selects and inputs one of the special reverse rotation control and the reverse rotation control as the control executed in the second special mode is estellt. Electrically driven tool (1) after Claim 3 comprising a forward / reverse switching section (22) for setting the direction of rotation of the motor, wherein the control section (51) is arranged to switch to the special mode when the operation mode is switched to an operation of the forward / reverse switching section (22 ) is set to the forward rotation direction, performs a control set as the control executed in the first special mode, and when the operation mode is switched to the special mode and the reverse direction is set in accordance with an operation of the forward / reverse switching section (22), performs a control , which is set as the control executed in the second special mode. Electrically driven tool (1) after Claim 3 or 4 comprising a setting display section (65, 69) configured to display the setting state of the control selected for the first special mode and the setting state of the control selected for the second special mode. Electrically driven tool (1) after Claim 5 wherein the adjustment display section is configured to simultaneously display the two adjustment states. Electrically driven tool (1) according to one of Claims 3 to 6 comprising a selection operation section (63) for selecting the speed set value and the control executed in the first special mode and the second special mode, wherein the control section (51) is configured so that when the operation mode is switched to the normal mode, the speed setting value is selected according to an operation of the selection operation section (63), and when the operation mode is switched to the special mode, according to an operation of the selection operation section (63), the control executed in the first special mode and the second special mode is selected. Electrically driven tool (1) after Claim 7 wherein the selection operation section (63) is also for switching the operation mode, wherein the control section (51) is adapted to switch the operation mode according to an operation of the selection operation section between to switch to normal mode and special mode. Electrically driven tool (1) after Claim 7 or 8th wherein the control section (51) is arranged such that upon depression of the selection operation section (63) shorter than a preset threshold duration, the rotation amount setting value is selected and when the selection operation section (63) is pressed longer than that Threshold duration is the one selected in the first special mode and in the second special mode. Electrically driven tool (1) according to one of Claims 2 to 6 comprising a selection operation section for selecting the speed setting value and a mode operation section for switching between the normal mode and the special mode, wherein the control section (51) is arranged such that when the operation mode is switched to the normal mode, the speed setting value is selected according to an operation of the selection operation section , Electrically driven tool (1) according to one of Claims 7 to 10 wherein the selection operation section (63) also serves to adjust the tightening force after an increase in the tightening load and a value with respect to the amount of movement of the tightening element after releasing the tightening element, wherein the control section (51) is formed such that, if in the first Special mode, the special forward rotation control is performed, the tightening force of the tightening member is set after the rise of the tightening load according to an operation of the selection operation section (63), and when the special backward rotation control is executed in the second special mode, the value with respect to the moving amount of the tightening element after releasing the tightening member Tightening element is set according to an operation of the selection operation section (63). Electrically driven tool (1) after Claim 11 , comprising an information display section configured to display tightening force information when the special forward rotation control is executed in the first special mode and to display movement amount information when the special reverse rotation control is performed in the second special mode.

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