EP3389943B1 - Hand-held power tool comprising a percussion mechanism - Google Patents

Description

State of the art

The present invention relates to a hand-held power tool with a drive unit for driving an insert tool in at least one non-percussion operating mode, the drive unit having a percussion mechanism for percussively driving the insert tool in an associated percussion mode.

Drills and hammer drills are known from the prior art which have a drive unit with a hammer mechanism for driving an associated tool in a corresponding hammer mode, the drive unit having an actuatable switching ring for switching the drive unit between at least one non-hammering operating mode and the corresponding one Impact mode is assigned. In addition, from the EP 2 848 371 A1 a drill / driver is known in which an automatic gear change of a planetary gear assigned to a drive unit takes place by means of an electric servomotor. However, this drill / driver has no hammer mechanism.

A hand machine tool with a striking mechanism is off WO 2015/061370 A1 known.

Disclosure of the invention

The invention relates to a new handheld power tool according to claim 1.

The invention thus makes it possible to reduce the likelihood of operating errors on the part of the user. For example, depending on a specific application scenario, such as drilling in concrete, stone or wood, the hammer mechanism can either be activated or deactivated without the user becoming active. In addition, an increase in the general ease of use can be achieved.

According to the invention, the user guidance unit is at least partially integrated into the handheld power tool and is at least partially designed as an external, separate component.

As a result, for example, a convenient, complete remote control of the handheld power tool is possible.

The user guidance unit preferably has a mobile computer, in particular a mobile computer designed in the manner of a smartphone or tablet computer. Alternatively, other so-called "smart devices" such as. B. a watch, glasses, etc. can be used as a mobile computer.

This enables extensive control processes of the handheld power tool to be implemented with the aid of the user guidance unit.

The user guidance unit preferably has an interactive program for communication with the communication interface, in particular a smartphone app.

As a result, complex operating processes of the handheld power tool can also run under program control or automatically, that is to say without user intervention.

According to the invention, the user guidance unit has at least one operating element for initiating a switchover process for switching the drive unit between the at least one non-striking operating mode and the associated impact mode, the communication interface being designed to send a control signal to the at least one operating element in order to generate a To enable switching instruction or a request to initiate a switching process for switching the drive unit between the at least one non-striking operating mode and the associated striking mode by the at least one operating element.

As a result, a device-side switching instruction or a request can be issued to the user in order to induce the user to switch between the at least one non-impacting operating mode and the impact mode.

The at least one operating element is preferably provided with a lighting means and the control signal is designed to activate the lighting means for visualizing the switching instruction to initiate a switching process for switching the drive unit between the at least one non-impacting operating mode and the associated impact mode.

With the help of the at least one luminaire, an urgent, active user guidance can be implemented to facilitate the operability of the handheld power tool.

In an advantageous embodiment, the at least one operating element is designed as a switch or button.

As a result, various haptic actuation options can be implemented for the user.

The at least one operating element preferably has a display and the control signal is designed to display a display on the display for visualizing the switching instruction for initiating a switching process for switching of the drive unit between the at least one non-striking operating mode and the associated striking mode.

In this way, a switching instruction or a request with a higher information content, for example a plain text instruction and / or a graphic symbol or a pictogram, can be transmitted to the user.

According to a technically advantageous embodiment, the display is designed in the manner of a touchscreen.

This results in a further increased functionality of the display, since it also enables user inputs in addition to its display functionality. In addition, the user experience is more intuitive, since the symbols or icons shown on the display can be selected directly by touching them with the finger and the process logically linked to them can be triggered by means of the (control) electronics.

Preferably, the at least one operating element can be actuated to initiate a switching process for switching the drive unit between the at least one non-impact operating mode and the associated impact mode and has a sensor which is designed to assign an actuation signal to the communication interface when the at least one operating element is actuated to transfer.

As a result, electronic feedback on the presence of an active user input to the electronics is possible.

According to one embodiment, a servomotor is provided which is designed to switch the drive unit between the at least one non-impact operating mode and the associated impact mode when activated.

As a result, a motorized switchover between the non-striking operating mode and the striking mode, independent of the active activity of the user, is possibly also possible. In addition, constant, minimal actuation forces can always be achieved by the servomotor for the user, which are independent of a respective mechanical switching state of the transmission, the torque clutch and / or the hammer mechanism of the handheld power tool.

The servomotor can preferably be activated by actuating the at least one operating element.

As a result, the servomotor can be activated directly, independently of the mobile computer or complex (control) electronics, solely through active user intervention.

The communication interface is preferably designed to transmit a control signal to the servomotor for activating the servomotor.

As a result, the communication interface can control the servomotor automatically, i.e. detached from an active actuation of the at least one operating element on the part of the user.

The communication interface is preferably designed to transmit a control signal to actuators of the handheld power tool, at least one actuator being designed to switch the drive unit between the at least one non-striking operating mode and the associated impact mode when activated by the communication interface.

As a result of the at least one actuator, a complete control of the control mechanism of the handheld power tool can possibly be implemented by means of the communication interface, for example in order to switch between the at least one non-striking operating mode and the striking mode.

The communication interface is preferably designed in the manner of a wireless transmission module, in particular as a radio module for wireless communication using the Bluetooth standard.

As a result, the remote control of the handheld power tool or a tool system that exists with it and the mobile computer can be used standardized, interference-free and highly compatible radio standards can be implemented.

Brief description of the drawings

Fig. 1

eine perspektivische Ansicht einer Handwerkzeugmaschine,

Fig. 2

einen Teillängsschnitt der Handwerkzeugmaschine von Fig. 1 gemäß der Schnittlinie II-II von Fig. 1,

Fig. 3

eine perspektivische Ansicht eines Schaltrings der Handwerkzeugmaschine von Fig. 2,

Fig. 4

eine Draufsicht auf einen vergrößerten Längsschnitt der Handwerkzeugmaschine von Fig. 1 gemäß der Schnittlinie IV-IV von Fig. 1,

Fig. 5

eine perspektivische Ansicht eines Werkzeugsystems bestehend aus der Handwerkzeugmaschine von Fig. 1 und einer Bedieneinheit gemäß einer ersten Ausführungsform,

Fig. 6

eine perspektivische Detailansicht der Bedieneinheit von Fig. 5 und der Stelleinheit von Fig. 2,

Fig. 7

eine perspektivische Teilansicht der Handwerkzeugmaschine von Fig. 1 mit einer Bedieneinheit gemäß einer zweiten Ausführungsform,

Fig. 8

ein Blockdiagramm des Werkzeugsystems von Fig. 5 mit der Handwerkzeugmaschine und dem mobilen Computer von Fig. 5,

Fig. 9

eine Teilseitenansicht der Handwerkzeugmaschine von Fig. 1 mit einer Bedieneinheit gemäß einer dritten Ausführungsform, und

Fig. 10

eine vergrößerte Ansicht des mobilen Computers des Werkzeugsystems von Fig. 5.

The invention is explained in more detail in the following description on the basis of exemplary embodiments shown in the drawings. In the drawings, the same structural elements with identical functionalities each have the same reference numbers and are generally only described once. Show it:

Fig. 1

a perspective view of a hand machine tool,

Fig. 2

a partial longitudinal section of the hand machine tool from Fig. 1 according to the section line II-II of Fig. 1 ,

Fig. 3

a perspective view of a switching ring of the handheld power tool from FIG Fig. 2 ,

Fig. 4

a plan view of an enlarged longitudinal section of the handheld power tool from FIG Fig. 1 according to section line IV-IV of Fig. 1 ,

Fig. 5

a perspective view of a tool system consisting of the hand tool of FIG Fig. 1 and a control unit according to a first embodiment,

Fig. 6

a perspective detailed view of the control unit of Fig. 5 and the setting unit of Fig. 2 ,

Fig. 7

a perspective partial view of the hand tool of FIG Fig. 1 with an operating unit according to a second embodiment,

Fig. 8

FIG. 3 is a block diagram of the tool system of FIG Fig. 5 with the hand machine tool and the mobile computer from Fig. 5 ,

Fig. 9

a partial side view of the hand tool of FIG Fig. 1 with an operating unit according to a third embodiment, and

Fig. 10

FIG. 8 is an enlarged view of the mobile computer of the tool system of FIG Fig. 5 .

Description of the exemplary embodiments

Fig. 1 shows a handheld power tool 10 with a tool housing 12 and an impact mechanism 30, which is exemplarily designed as a cordless hammer drill, which can preferably be mechanically and electrically connected to a battery pack 80 for mains-independent power supply. It should be pointed out, however, that the present invention is not to be seen as being limited to cordless hammer drills, but rather can be used with different handheld power tools in which the hammer mechanism 30 can be used, such as an impact wrench or a hammer drill. This is also independent of whether the handheld power tool 10 can be operated non-electrically or electrically, that is, network-dependent or network-independent or battery-powered.

A drive unit 20 for driving an insert tool 42 in at least one non-impact operating mode is preferably arranged in the tool housing 12, at least in sections. The drive unit 20 has, for example, an electric drive motor 22, a preferably switchable gear (90 in FIG Fig. 2 ), a percussion mechanism 30, only indicated here, for percussively driving the insert tool 42, which is accommodated in a tool holder 40 by way of example, in a percussion mode of the handheld power tool 10 and an optional torque coupling (72 in FIG Fig. 2 ) on. The drive motor 22, the switchable gearbox (90 in Fig. 2 ), the optional torque coupling (72 in Fig. 2 ), the hammer mechanism 30 and the tool holder 40 are illustratively arranged rotationally symmetrically to a longitudinal center axis 50 of the drive unit 20. The striking mechanism 30 is preferably constructed as a so-called detent striking mechanism 32. The optional torque coupling (72 in Fig. 2 ) adjustable in steps so that a maximum available torque at the tool holder 40 can be limited to a maximum value is. The tool holder 40 is designed here merely as an example as a quick-release clamping device 44 with a rotatable clamping ring 46 for radial clamping of the insert tool 42 with the aid of three clamping jaws 48, for example. The preferably exchangeable insert tool 42 can be, for example, a drill or a bit holder with a screwdriver bit.

The tool housing 12 also has an ergonomically shaped handle 14 with a hand switch 16 for switching on / off and for preferably continuously variable speed control of the electric drive motor 22. Furthermore, an optional, preferably radiating in the direction of the tool holder 40, on and off is on the handle 14 Illumination device 18, which can be switched off, is provided for illuminating a working field located in the region of the tool holder 40 of the handheld power tool 10. Furthermore, there is preferably a direction of rotation switch 24 on the handle 14 for changing the direction of rotation of the drive motor 22 in order to allow reversing operation of the handheld power tool 10. The direction of rotation switch 24 is preferably accommodated in the tool housing 12 such that it can be displaced transversely to the longitudinal center axis 50 for actuation.

The shiftable gearbox (90 in Fig. 2 ) The handheld power tool 10 can be switched between at least a first and a second gear stage. The first, preferably slow gear step is preferably assigned to the non-hammering operating mode, for example a screwdriving mode, and the second, preferably faster gear step is assigned to a drilling mode and / or the hammering mode. However, other gear steps can also be implemented so that, for example, the drilling mode is assigned to the second gear step and the impact mode is assigned to a third gear step, etc.

According to one embodiment, at least one user guidance unit 60 is provided, which serves at least to switch between the non-striking operating mode and the striking mode. The user guidance unit 60 can be designed for active and / or passive user guidance. In the case of active user guidance, a user of the hand-held power tool 10 is preferably given visual, auditory and / or haptic instructions, instructions or switchover instructions for switching between the non-striking ones Operating mode and the impact mode are guided, while with passive user guidance a corresponding switching process is carried out automatically by the handheld power tool 10 and this is preferably only displayed to the user. Exemplary realizations of active and passive user guidance are described in more detail below. For example, a vibration element, such as an electric motor with an eccentric or the like, can be provided in order to obtain feedback that the user can also perceive haptically as to whether the handheld power tool 10 is in the non-impact operating mode or in the impact mode.

The user guidance unit 60 preferably has at least one manually operable operating unit 62 with at least one, but here illustratively a first and second manually operable operating element 64, 66, the operating elements 64, 66 for initiating a switching process for switching between the non-impacting operating mode and the impact mode are formed. The two operating elements 64, 66 can be implemented as electrical switches, buttons, latching switches, buttons, pushbuttons, for gesture control and / or with a touch-sensitive display, such as a touch-sensitive screen or a touchscreen, which the better graphic overview is not here are shown. Furthermore, optical display elements or lighting elements (cf. in particular 520, 521, 522 in FIG Fig. 6 ) be assigned to display the respectively set operating mode of the handheld power tool 10, the display elements preferably being constructed with colored or white LEDs. The user guidance unit 60 preferably also has a mobile computer, for example a smartphone and / or a tablet computer and / or the operating elements 64, 66 are themselves designed as a display. Alternatively, other so-called "smart devices" such as. B. a watch, glasses, etc. can be used as a mobile computer.

According to one embodiment, the user guidance unit 60 is at least partially integrated into the handheld power tool 10 and / or at least partially as an external, separate component (300 in Fig. 5 ) designed. The display can be integrated into the handheld power tool 10 and / or arranged externally. Switching instructions can preferably be shown on the display in order to make it easier for a user of the handheld power tool 10 to operate and / or set, for example, an application-specific operating mode of the handheld power tool 10 in order to achieve optimal work results.

Furthermore, the handheld power tool 10 preferably has a bidirectional communication interface 400, which is preferably provided for communication with the user guidance unit 60, which can preferably be operated interactively by the user, but can alternatively also be a component of the user guidance unit 60. The communication interface 400 is preferably designed to receive switching instructions for application-specific switching of the handheld power tool 10 between the non-impact operating mode and the impact mode at least from the user guidance unit 60 or the operating unit 62. The communication interface 400 is designed at least to send at least one control signal to at least one of the operating elements 64, 66 or to automatically trigger a switchover process. In addition, it can be provided that the operating elements 64, 66, conversely, transmit an actuation signal to the communication interface 400 or to (control) electronics (not shown here) to notify that the user has actually made the corresponding application-specific switchover. The generation of a switchover instruction for initiating a switchover process between the impact mode and the non-impact operating mode is preferably enabled, e.g. by at least one of the two operating elements 64, 66.

According to one embodiment, the communication interface 400 is designed in the manner of a wireless transmission module 401, in particular as a radio module 405 for wireless communication by means of the Bluetooth standard. However, the transmission module 401 can also be designed for any other wireless and / or wired communication, e.g. via WLAN, WiFi and / or LAN.

Fig. 2 FIG. 10 shows the handheld power tool 10 of FIG Fig. 1 with the tool housing 12, in which the drive motor 22 is arranged as part of the drive unit 20 in a rear section 28 of the tool housing 12 facing away from the tool holder 40 with the three clamping jaws 48. The jaws 48 can be moved radially by means of the clamping ring 46 of the quick-release clamping device 44, which can be rotated about the longitudinal center axis 50. In the handle 14 of the tool housing 12 there is the manual switch 16 for actuating an electrical on / off switch 17. A drive shaft 34 of the drive motor 22 drives a switchable gear 90 for torque and speed adjustment, which is preferably designed as a planetary gear 92 and which has, for example, an at least approximately cylindrical gear housing 94. With the aid of the setting ring 70, the maximum torque that can be transmitted by an optional torque coupling 72 and that can be called up on the tool holder 40 can be set. The drive motor 22, the gearbox 90, the optional torque clutch 72 and the hammer mechanism hidden here (30 in Fig. 1 and Fig. 4 ) are arranged, for example, rotationally symmetrical to the longitudinal center axis 50 and axially offset to one another within the tool housing 12 of the handheld power tool 10.

A switching ring 100 which is rotatably arranged in the tool housing 12 by means of an actuating unit 102 is preferably provided coaxially to the longitudinal center axis 50 in the area of the torque coupling 70. This is preferably ring-shaped, i.e. at least approximately hollow-cylindrical, but can alternatively also be, for example, in the shape of a segment of a circle or an arc.

The actuating unit 102 preferably comprises an electric servomotor 104 and an actuating gear 106 which is driven in rotation by this and has a pinion 108 or a small gearwheel with a small number of teeth. The actuating gear 106 preferably has a high reduction ratio to increase the torque output by the servomotor 104 while at the same time reducing the speed of the pinion 108.

The switching ring 100 preferably has, on an underside 110 facing the handle 14, a radially outwardly directed toothing 114, which is preferably in constant engagement with the pinion 108 of the actuating unit 102. The underside toothing 114 of the switching ring 100 extends here preferably only in a circular arc section 115 of the switching ring 100 with an opening angle of preferably up to 90 °. The switching ring 100 is thus with the aid of the actuating unit 102 or the servomotor 104 according to an embodiment in an angular range of up to 90 °, or ± 45 ° around the longitudinal center axis 50, Can be pivoted or rotated by motor. As an alternative to this, a larger angular range can also be implemented with the correspondingly adapted toothing 114, for example. For example, the toothing 114 can completely encompass the switching ring 100, ie in the manner of a 360 ° toothing, and thus enable an unlimited angular range.

The switching ring 100 preferably has a first slide track 116 on the circumferential side, which is illustratively ramp-shaped and in which a switching rod 118 is guided. A shift bracket 120 made of a bent wire, which is preferably coupled to a shift ring gear of the transmission 90, which is concealed here, is preferably articulated to the shift rod 118. Therefore, by energizing the servomotor 104 with a specific direction of rotation, a motorized gear change of the shiftable transmission 90 can be brought about. Furthermore, at least one and here by way of example three deactivation elements 122, preferably evenly spaced from one another on the circumference, are formed on the switching ring 100, of which only two deactivation elements are visible here. The deactivation elements 122 are exemplarily designed as cams 124 formed integrally with the switching ring 100, which are directed axially in the direction of the tool holder 40 and which are used to activate or deactivate the percussion mode or to switch the percussion mechanism 30 (not visible here) on or off by means of a blocking element hidden here (200, in Fig. 4 ) to serve.

According to one embodiment, the switching ring 100 can be rotated at least into a first and second switching position about the longitudinal center axis 50, the first switching position or angle of rotation position being assigned to the non-impact operating mode and the second switching position to the impact mode of the handheld power tool 10, for example. The switching position of the switching ring 100 shown here as an example is the first switching position in which the striking mechanism 30 is switched off or the striking mode is deactivated.

According to one embodiment, the switching ring 100 also interacts with a position detection unit 130, which is designed, among other things, to precisely detect the current switching position of the switching ring 100 and to visualize it for the user. For this purpose, a second link track 132 is preferably introduced into the switching ring 100 on the circumferential side, which illustratively is at least approximately rectilinear and transverse to a cross section of the switching ring 100 runs. A peg-like guide element 134, which is only indicated by dashed lines, engages in the slide track 132 of the switching ring 100 on the underside of a plate-shaped base body 133 of the position detection unit 130. As a result, every change in the current angle of rotation or the switching position of the switching ring 100 is transformed into a proportional axial displacement of a pointer-like display element 136 of the position detection unit 130 directed away from the guide element 134. The pointer-like display element 136 allows, for example in connection with a scale element, which is attached in the vicinity of the display element 136 in the area of the tool housing 12 and is not shown for a better graphic overview, then at least a purely mechanical display for the user as to whether the handheld power tool 10 is in the non- beating operating mode or in the beating mode.

In the axial position of the position detection unit 130 symbolized by a solid black line, it is in a first axial detection position, while the position detection unit 130 is in the position indicated by a dashed line in a second axial detection position. The first detection position corresponds to the first switching position of the switching ring 100 shown here and the non-striking operating mode, while the second detection position corresponds to the second switching position of the switching ring 100 in which the striking mode is active.

Furthermore, an electronic linear sensor 138 is preferably arranged in the area of a circuit board 139 of complex electronics 140 assigned to the position detection unit 130 and is designed to detect the current axial detection position of the position detection unit 130. The linear sensor 138 preferably detects the linear movement of the pointer-like display element 136 of the position detection unit 130, which is oriented perpendicular to the longitudinal center axis 50, and thus indirectly the respective switching or rotational position of the actuatable switching ring 100 an exact mechanical transformation of the rotary movement of the switching ring 100 into a proportional linear position of the display element 136 is guaranteed.

For this purpose, at least one sensor element is preferably assigned to the linear sensor 138. Illustratively, however, the linear sensor 138 here has three sensor elements 142, 143, 144 for better path resolution. Alternatively, an angle sensor 145 can also be used to detect a respective angle of rotation position of the switching ring 100, which allows a direct scanning of the respective switching or rotational position of the switching ring 100, whereby a backlash-free detection of the switching or the rotational position of the switching ring 100 with a higher Measurement accuracy is made possible.

With the preferably non-contact, electronic linear sensor 138 and / or the angle sensor 145, it is possible to electronically detect the switching position of the switching ring 100 with high accuracy, e.g. to process it further using the electronics 140 and thus to process complex, automatically running control and / or regulation processes to be implemented with the aid of the actuating unit 102. The electronics 140 preferably at the same time control the drive motor 22 and / or the lighting device 18 of Fig. 1 , wherein the drive motor 22 is preferably dependent on one of the direction of rotation switch (24, in Fig. 1 ) transmitted direction of rotation signal is controlled. The manual switch 16 preferably has a lock, which is preferably designed as a mechanical and / or electrical lock. Furthermore, the on / off switch 17 and / or the electronics 140 are connected to the battery pack (80, in Fig. 1 ) powered.

Fig. 3 FIG. 10 shows the switching ring 100 of the handheld power tool 10 from FIG Fig. 2 that is in the area of his in Fig. 2 the pinion 108 of the actuator 102 of Fig. 2 facing underside 110 has the radially outwardly directed toothing 114, which is preferably formed in one piece with switching ring 100 and extends here only as an example circumferentially over an angle α of about 60 °, thus pivoting the switching ring by ± 30 ° starting from the illustrated here Position to allow. In the area of one of the tool receptacles 40 from Fig. 2 facing end face 125 of switching ring 100, the three deactivating elements 122, exemplarily designed as cams 124, are formed, preferably in one piece with switching ring 100, and preferably evenly offset from one another by 120 ° circumferentially. By way of illustration, the cams 124 each have a base surface, for example in the shape of a circular ring sector, which is preferably parallel to the end face 125.

A tab-like extension 127 is preferably formed at least approximately diametrically to the toothing 114 on a circumferential section of a rear side 126 of the switching ring 100. Its curvature preferably corresponds to that of the switching ring 100 and its shape corresponds, for example, approximately to that of a rectangular section from a hollow cylinder. In the extension 127 are the two slide tracks 116, 132, which preferably extend radially completely through it and run approximately transversely to the longitudinal center axis 50 Fig. 2 brought in.

Illustratively, three adjusting cams 129 are also formed in the area of an example of an approximately cylindrical inner surface 128 of the switching ring 100, which are used to adjust one of the optional torque coupling (72 from FIG Fig. 2 ) serve the maximum transmittable torque or a response torque of the torque clutch. Of the total of three setting cams 129, only a single setting cam is visible here. The setting cams 129 axially adjoin the cams 124 for activating or deactivating the impact mode, but are preferably positioned offset on the circumferential side and point towards the rear side 126 of the switching ring 100. Furthermore, the setting cams 129 close flush with the cams in the radial direction 124 at.

Fig. 4 FIG. 10 shows the preferred shiftable transmission 90 of FIG Fig. 2 , which is preferably designed in the manner of a reduction gear with at least two switchable gear stages. Illustratively, the switchable gear 90 is designed here as a planetary gear 92 with three planetary stages arranged in the gear housing 94: a front planetary stage 160 on the drive motor side, a middle planetary stage 162 and one of the tool holder 40 from FIG Fig. 2 closest rear planetary stage 164.

The front planetary stage 160 has, for example, a sun gear 166, at least two planet gears not designated for the sake of better graphic clarity, a planet carrier 168, and an axially immovable and rotationally fixed ring gear 170 arranged in the gear housing 94. For the rotating drive of the planetary gear 92, the sun gear 166 is the front planetary stage 160 at least non-rotatably, for example by a form-fitting connection or the like, connected to the armature shaft 34 of the drive motor 22, or as an output pinion 171 of the armature shaft 34 executed. The middle planetary stage 162 has, for example, a sun gear 172 - which is formed in one piece on the planetary carrier 168 of the front planetary stage 160 - at least two planetary gears (not designated), a planetary carrier 174 and the peripheral, axially displaceable switching ring gear 176 Sun gear 178 - which is integrally formed on the planet carrier 174 of the upstream middle planetary stage 162 -, two planet gears (not designated) and a planet carrier 180. In addition, in the area of the rear planetary stage 164, an axially immovable and non-rotatably received ring gear 182 in the transmission housing 94 is shown not further described slip clutch is assigned. The switching bracket 120 of preferably engages in the switching ring gear 176 Fig. 2 a, so that by means of the actuator 102 of Fig. 2 rotatable switching ring 100 (cf. esp. Fig. 2 ) a motorized gear change, for example between at least one fast and one slow gear stage of the shiftable transmission 90, can be effected by axially displacing the switching ring gear 176 of the middle planetary stage 162.

One preferably rotatable in a first and a second bearing 52, 54 in the tool housing 12 of FIG Fig. 2 The output spindle 150 is supported by means of the switchable planetary gear 92 and the optional torque clutch 72 that follows it Fig. 2 can be driven in rotation. The two bearing points 52, 54 are preferably constructed with radial ball bearings. The tool holder 40 of Fig. 2 with the two clamping jaws 48 visible here, the output spindle 150 is preferably arranged non-rotatably on a threaded section 152. The clamping jaws 48 are clamped radially inwards with the aid of the clamping ring 46 of the quick-release clamping device 44 of FIG Fig. 2 . An end section 154 of the output spindle 150 directed away from the threaded section 152 engages in the planet carrier 180 of the rear planetary stage 164 and is connected to it in a rotationally fixed manner.

The level of a maximum torque that can be transmitted by the optional torque coupling 72 is by means of the setting ring 70 from Fig. 1 adjustable by the user. The detailed structural design of such a torque coupling is a matter of skill in the field of handheld power tools Sufficiently familiar from the prior art, so that a more detailed description can be dispensed with at this point.

According to one embodiment, a blocking member 200 is provided. This is configured here as an example of a bearing bracket 202 with an approximately S-shaped cross section and a first and a second leg 204, 206. The legs 204, 206 preferably run parallel to one another and in each case transversely to the longitudinal center axis 50 and between the legs 204, 206 there is preferably a straight central section, which is not designated for the sake of better graphic clarity and which runs parallel to the longitudinal center axis 50.

In the rotational position or rotational angle position of the switching ring 100 illustrated here, the handheld power tool 10 is located in FIG Fig. 1 in the non-hitting mode of operation. In this, the first leg 204 of the bearing bracket 202 rests axially against the cam 124 or the deactivation element of the switching ring 100, while the second bearing 54 is axially fixed on both sides between the second leg 206 of the bearing bracket 202 and a shoulder 156 of the output spindle 150 . The blocking member 200 or the bearing bracket 202 is in its illustrated position in a blocking position 208 and the impact mode is deactivated or the non-impact operating mode of the handheld power tool 10 is active.

If the switching ring 100 by means of the actuating unit 102 of Fig. 2 or the servomotor 104 of Fig. 2 rotated, the bearing bracket 202, as indicated by an arrow 210, can move axially to a limit position 212, so that the second bearing 54 and with it the output spindle 150 against the force of a spring 214 axially periodically oscillating about an axial path 216 or a distance between the blocking position 208 and the limiting position 212 on the drive motor side can spring in and out and thus the striking mode of the handheld power tool 10 or the striking mechanism 30, which is preferably designed as a detent striking mechanism 32, is activated. The detailed structure of such a striking or detent striking mechanism 30, 32 is also sufficiently known to the person skilled in the art from the prior art, so that a more detailed description of the same can be dispensed with at this point.

Fig. 5 FIG. 1 shows a tool system 1000 that includes the handheld power tool 10 of FIG Fig. 1 having. The handheld power tool 10 is connected to the user guidance unit 60 of FIG Fig. 1 provided, which here preferably has an operating unit 500 for manual setting of the non-striking operating mode and the striking mode. In the tool housing 12 of the handheld power tool 10 there are, inter alia, the electric drive motor 22 and the switchable gear 90 for the rotating drive of the tool holder 40.

The operating unit 500 is preferably equipped with at least one, but here illustratively three operating elements 502, 504, 506 for switching between the non-striking operating mode and the striking mode of the handheld power tool 10. As an example, the operating element 502 is provided for activating the screwdriving mode, the operating element 504 for setting a drilling mode and the operating element 506 for selecting the impact mode, the operating elements 502, 504, 506 having, for example, graphic symbols or pictograms corresponding to the operating modes. The operating elements 502, 504, 506 are preferably arranged on a circuit board 508 or printed circuit board. The operating unit 500 is preferably at least partially integrated into the handheld power tool 100. Furthermore, the operating unit 500 can be equipped with an (LC) display 530, indicated here only by dashed lines, the control signal described above being designed, for example, to display a display on the display 530 for visualizing a switchover instruction or a request to initiate a switchover process for To generate switching of the drive unit 22 from the non-striking operating mode to the striking mode.

According to one embodiment, the user guidance unit 60 is at least partially designed as an external, separate component 300, as described above. In this case, as shown here, the external component 300 preferably has a mobile computer 600 as a further user guidance unit, which is designed in particular in the manner of a smartphone and / or tablet computer. Alternatively, other so-called "smart devices" such as. B. a watch, glasses, etc. can be used as a mobile computer. Under certain circumstances, as explained above, the provision of the operating unit 500 can be dispensed with, in particular if this can be implemented by the mobile computer 600. To display a set operating mode, the Handheld power tool 10 preferably also has display 530, user guidance unit 60 forming tool system 1000 together with handheld power tool 100.

The mobile computer 600 preferably has at least one electronic display 601, which is preferably designed in the manner of a touch-sensitive screen or a touchscreen. For inputting at least one operating mode of handheld power tool 10, display 601 preferably has at least one, but here illustratively three operating elements 602, 604, 606. Examples are in Fig. 5 the operating elements 602, 604, 606 shown on the display 601 as operating fields or icons or pictograms, but could also be designed as switches and / or buttons.

In the event that the user guidance unit 60 includes both the operating unit 500 and the mobile computer 600, the control signal is preferably designed to display a switchover instruction or a request to initiate a switchover process to switch between the non-impacting operating mode on the display 601 and to generate or display the beat mode. In this case, specific (action) instructions are preferably displayed via the display 601, e.g. an instruction as to which operating mode should be set for a given work step, which a user of the handheld power tool 10 can then subsequently set, e.g. via the operating unit 500 on the handheld power tool 10. The operating elements 502, 504, 506 on the hand-held power tool 10 can be provided with light-emitting lighting means 510, 512, 514, the control signal in this constellation being designed to switch on the corresponding lighting means 510, 512, 514 in each case. The lighting means 510, 512, 514 are preferably implemented with spatially compact lighting elements 520, 521, 522, such as colored or white LEDs.

In addition, the mobile computer 600 can also be at least partially integrated into the handheld power tool 10, with the respective operating mode being set in such a constellation then preferably automatically in each case, preferably via the electromotive actuating unit 102 or the servomotor 104 from Fig. 2 , is made. It should also be noted that the in Fig. 5 The exemplary implementations of the user guidance unit 60 described can be combined with one another as desired and that, for example, the communication interface 400 can also take over the functionality of the user guidance unit 60.

Fig. 6 shows the operating unit 500 of Fig. 5 with the operating elements 502, 504, 506, as well as the actuating unit 102 of Fig. 2 . The operating unit 500 preferably has at least one, but here by way of example three electrical switching elements 535, 536, 537. To display a respectively set operating mode, three lighting elements 520, 521, 522 are preferably provided (cf. Fig. 5 ). Here, one of the electrical switching elements 535, 536, 537 is uniquely assigned to one of the lighting elements 520, 521, 522 and one of the operating elements 502, 504, 506. Illustratively, the switching element 535 and the lighting element 520 are assigned to the operating element 502 (screwing mode), the switching element 536 and the lighting element 521 are assigned to the operating element 504 (drilling mode) and the switching element 537 and the lighting element 522 are assigned to the operating element 506 (impact mode).

The three lighting elements 520, 521, 522 are preferred, at least for the automatic display of the switching instruction for initiating a switching process for switching the striking mechanism (30, 32 in Fig. 2 ) can be activated between the non-striking operating mode and the striking mode. The electrical switching elements 535, 536, 537 are preferably designed as switches or buttons and / or the lighting elements 520, 521, 522 are implemented with colored or white LEDs. Alternatively, the operating unit 500 can also be designed in the manner of an (LC) display, preferably with touchscreen functionality, and / or in the manner of a mobile computer, with a symbol to be actuated by the user on the display or icon respectively lighting up and / or can blink.

The operating unit 500 preferably interacts with the actuating unit 102 made up of the servomotor 104 and the servomotor gearbox 106, which in turn interacts with the rotatable or pivotable switching ring 100 (cf. Figs. 2 to 4 ) is mechanically connected, so that the user can easily select an operating mode of the handheld power tool 10 from by means of a finger 1200 Fig. 1 can adjust. The current position of the switching ring 100 is in each case by the position detection unit (cf. esp. Fig. 2 ), which is axially displaced along a double arrow 1201 in proportion to the current (rotational) angle of the switching ring 100.

The electrical circuit board 508 of the operating unit 500 preferably has an elastic foil cover 540 in the manner of a foil keyboard to protect against contamination, which is translucent at least in the area of the lighting elements 520, 521, 522 and enables the switching elements 535, 566, 537 underneath to be operated smoothly . The lighting elements 520, 521, 522 can also be placed directly below the operating elements 502, 504, 506 and the symbols or pictograms assigned to them for the screwing mode, the drilling mode and the impact mode. In this way, an operating mode to be actively set by the user or an operating mode selected automatically by the handheld power tool to achieve optimal work results in a specific application scenario can be visualized by the corresponding symbol lighting up.

Fig. 7 shows the operating unit 500 of Fig. 5 which, according to one embodiment, has a setting element 700 for manually selecting the respective operating mode. The tool housing 12 of Fig. 2 includes, inter alia, the drive motor 22, the manual switch 16, the switchable gear 90, the rotatable switching ring 100, the tool holder 40 and the communication interface 400 integrated in the tool housing 12 in the area of the handle 14.

A lever-like adjusting element 700 is preferably integral to the actuatable switching ring 100 of FIG FIGS. 2 to 4 and protrudes in relation to the longitudinal center axis 50 radially out of a recess 702 in the operating unit 500. By pivoting the setting element 700 in the direction of a double arrow 704, the switching ring 100 is preferably rotated, whereby the respective operating mode can be set directly. Analogous to Fig. 5 and Fig. 6 the operating elements 502, 504, 506, which here preferably have no switching functionality, have graphic symbols or pictograms corresponding to the respective operating modes (screwing mode, drilling mode, impact mode). In the in Fig. 7 The pivot position of the setting element 700 shown is exemplary a non-striking operating mode of the handheld power tool 10 from FIG Fig. 1 , in particular the tightening mode, selected.

Fig. 8 FIG. 13 shows a block diagram of the tool system 1000 of FIG Fig. 5 with the handheld power tool 10 and the mobile computer 600. Accordingly, the handheld power tool 10 again includes, inter alia, the drive unit 20, which has the drive motor 22, the gear 90, the hammer mechanism 30 and the optional torque clutch 72.

The electronics 140 of Fig. 2 preferably controls at least one actuator 801, 802, 803. Examples are in Fig. 8 three actuators 801, 802, 803 are provided, the actuator 801 being designed, for example, to change gears of the transmission 90, the actuator 802 to activate / deactivate the hammer mechanism 30 and the actuator 803 to set a maximum torque M that can be transmitted by the optional torque clutch 72. Preferably When one of the three actuators 801, 802, 803 is activated, the electronics 140 give an activation signal to an assigned lighting means 510, 512, 514 or at least one of the lighting elements 520, 521, 522 (cf. in particular Fig. 5 and Fig. 6 ) continue. Alternatively or additionally, the activation signal can also be designed as a signal tone or a haptically perceptible (vibration) signal.

According to one embodiment, the mobile computer 600 has an interactive first and second program 806, 808, in particular a smartphone app, for communication with the communication interface 400 of the handheld power tool 10. The first program 806 is preferably designed for setting special applications, e.g. to screw a screw into soft or hard wood. Here, the program 806 preferably determines the most suitable operating parameters to achieve optimal work results for the respective application, e.g. a speed, a direction of rotation, a torque, a gear step and / or an impact operation requirement, and forwards these to the communication interface 400 of the handheld power tool 10.

The communication interface 400 is preferably designed to transmit a control signal to the actuators 801, 802, 803 of the handheld power tool 10, at least one actuator 801 being designed to respond when activated to switch the shiftable transmission 90 between at least two gear steps through the communication interface 400. Furthermore, the actuator 802 is designed, for example, to switch between the non-striking operating mode and the striking mode of the striking mechanism 30 of the handheld power tool 10 when activated by the communication interface 400. Accordingly, the third actuator 803 is used, for example, to change the maximum torque M that can be transmitted by the optional torque clutch 72. The communication interface 400 preferably forwards the control signal to the electronics 140, which then activate or control the respective assigned actuators 801, 802, 803.

Alternatively or additionally, the second program 808 is provided, which is designed to set at least one specific operating parameter, e.g. a speed, a direction of rotation, a torque, a gear step and / or an impact operation requirement. In this constellation, a user of the handheld power tool 10 specifies the desired operating parameters directly via the program 808. These are then transmitted to the communication interface 400 of the handheld power tool 10, the communication interface 400 forwarding a corresponding control signal as described above.

As an alternative or in addition, the handheld power tool 10 can have at least one signal transmitter 814, 815, 816 or at least one of the operating elements 502, 504, 506 (cf. in particular. Fig. 5 and Fig. 6 ) exhibit. It can be provided here that at least one signal transmitter 814, 815, 816 sends an actuation signal to the communication interface 400 and / or the electronics 140. Examples are in the Fig. 8 three signal transmitters 814, 815, 816 are shown. The signal transmitter 814 is designed, for example, for gear shifting, the signal transmitter 815 is used to activate and / or deactivate the percussion mechanism 30, and the signal transmitter 816 has the function of setting the torque of the optional torque clutch 72.

The respective signal transmitter 814, 815, 816 is preferably designed to send an application-specific or input-dependent control signal to the electronics 140, so that the electronics 140 control the respective actuators 801, 802, 803 can activate and / or control accordingly. The signal generators 814, 815, 816 are preferably designed as electrical signal generators, in particular as switches or buttons, but can also be designed as any other signal generators, for example as a mechanically displaceable lever arm or the like.

In addition, the user guidance unit 60 comprising the operating unit 62 (cf. in particular Fig. 1 , Fig. 5 and Fig. 6 ) a display and / or the mobile computer 600 can be assigned, which - as described above - displays switching instructions or requests for application-specific switching between the non-impact operating mode and the impact mode of the handheld power tool 10. The switching instructions can be visualized on the display and / or the mobile computer 600 with symbolic and / or text-based step-by-step instructions, with pictograms or the like. Here, the at least one operating element 64, 66 (cf. in particular Fig. 1 ) to initiate a switching process for switching between the non-striking operating mode and the striking mode, preferably a sensor 820 which is designed to connect the communication interface 400 and / or the mobile computer 600 (cf. in particular. Fig. 6 ) when the user actuates the at least one operating element 64, 66, to transmit an actuation signal as an acknowledgment or feedback to the electronics 140, so that a respective next step of the switchover instruction can be displayed.

Furthermore, the sensor 820 can also be designed as an internal and / or external sensor for monitoring and / or optimizing the work processes of the handheld power tool 10. For example, the sensor 820 can be designed as a temperature sensor, acceleration sensor, magnetic field sensor, 3D position sensor, etc. Another program or software or smartphone app can be stored, which is designed to check the settings of the electronics 140 or of the handheld power tool 10 and, if necessary, to adjust them. For example, in the event of thermal overheating of the drive motor 22, a warning signal can be output and / or the impact mode can be deactivated. Furthermore, in the event of a thermal overload of the drive motor 22 due to an excessive torque applied to the tool holder, an automatic gear change can be triggered.

Furthermore, an adapter interface 826 can be provided for connection to at least one adapter 830. The adapter interface 826 can be designed in the manner of a mechanical interface, an electrical interface and / or an electronic data interface, the adapter 830 for transmitting information and / or control signals, such as a torque, a speed, an electrical voltage, an electrical one Current and / or further data to the handheld power tool 10 is formed. In the case of an adapter interface 826 embodied as a data interface, the adapter 830 preferably has a transmission unit (not shown). The adapter 830 can preferably be designed, for example, as a range finder and transmit measured values or parameters that have been determined to the electronics 140 of the handheld power tool 10 via the adapter interface 826. Here, the adapter 830 can be used with and / or without a drive unit 22. The adapter 830 can preferably be activated via the mobile computer 600, it or the display being able to visualize activation of the adapter 830. Furthermore, the electronics 140 preferably controls the drive motor 22 and / or the lighting device 18 of the handheld power tool 10, the drive motor 22 preferably being controlled as a function of a direction of rotation signal transmitted by the direction of rotation switch 24. The manual switch 16 preferably has a (safety) lock 832, which is preferably designed as a mechanical and / or electrical lock. Furthermore, the electrical on / off switch 17 and / or the electronics 140 are supplied with current from the battery pack 80.

Fig. 9 FIG. 10 shows the handheld power tool 10 of FIG Fig. 1 with the tool housing 12 and the handle 14 integrally formed thereon on the underside and the optional communication interface 400 positioned therein, the manual switch 16, the rotational direction switch 24 and the tool holder 40 has a toggle-type rotary switch 902 in the non-striking operating mode and the striking mode, which differs from all of the embodiments described above.

The rotary switch 902 is preferably one lighting means 904, 906, 908 or on for the non-striking operating mode and the striking mode Assigned lighting element. For example, the lighting means 904, 906 are preferably assigned two non-impact operating modes, for example a screwing mode and a drilling mode, while the lighting means 908 is assigned, for example, the impact mode. The circularly positioned lighting means 904, 906, 908 are preferably implemented with colored LEDs or white LEDs.

By rotating the rotary switch 902 in the direction of a double arrow 910, the user can easily switch between the mentioned operating modes of the handheld power tool 10. Here, the rotary switch 902 can perform a maximum angle of rotation of e.g. 180 °. The lighting means 904, 906, 908 can, if necessary. serve to directly light up translucent graphic symbols for the screwing mode, drilling mode and impact mode, at least in areas, in order to further optimize the ease of use of the handheld power tool 10.

As already described in the description of Fig. 8 explained, the lighting means 904, 906, 908 can be activated, for example, by means of the electronics 140 and / or the communication interface 400, which displays the operating mode currently specified on the machine side and therefore to be set, which deviates from the current operating mode and in which the user can use the handheld power tool 10 to achieve optimum work results in a specific application by turning the rotary switch 902 in one of the two directions of the double arrow 910. In addition, a further lighting means 912 can be integrated into the at least partially transparent direction of rotation switch 24 in order to signal to the user, for example, the need to reverse the direction of rotation of the tool holder 40 and thus of the insert tool. This can be the case, for example, when the electronics 140 detects a rapid increase in torque, which indicates, for example, a drill stuck or seized in the workpiece, which can preferably be remedied by changing the direction of rotation of the tool holder 40 at least for a short time.

The four lighting means 904, 906, 908, 912 of the handheld power tool 10 are thus used to initiate a complex act of use on the part of the user in the context of passive user guidance, whereby Art the necessary actuation and / or the control element to be actuated itself, here as an example the turning of the rotary switch 902 or the transverse axial displacement of the direction of rotation switch 24 in relation to the longitudinal center axis 50, is conveyed to the user in a simple, intuitively perceptible manner.

Fig. 10 FIG. 10 shows the mobile computer 600 of the tool system 1000 of FIG Fig. 5 . On the display 601 of the mobile computer 600, a first and a second switchover instruction 608, 610 or a request to initiate an intervention on the part of the user is shown visually and textually by means of one of the programs (806, 808 in Fig. 8 ) or a smartphone app or a tablet app.

The first switching instruction 608 or request is intended, for example, to prompt the user to deactivate the impact mode or to switch to the at least one non-impact operating mode of the handheld power tool 10, for example by actuating one of the two operating elements 64, 66 of the operating unit 62. For this purpose, there is a graphic illustration by means of a symbol 612 or a pictogram and / or an arrow 614, which gives the user a clear indication of the operating element 64, 66 on the handheld power tool 10 to be actuated in the specific application.

The second switching instruction 610 or request is sent to the user in order, for example, to induce him to insert a specific insert tool 42, which is optimally suited for the currently pending application process, such as a wood drill, a metal drill or a masonry drill or the like, into the tool holder 40 of the handheld power tool 10 of Fig. 1 insert and clamp. In order to make this possible, the user can be queried by means of a further interactive program or program module running on the mobile computer 600 with regard to the details of the application or work task to be processed by him, so that a suitable switchover instruction 610 or request is then issued it can endure, which specifies, for example, the type of an insert tool to be inserted into the tool holder.

Claims (13)

1. Hand-held power tool (10) having a drive unit (20) for driving an insertion tool (42) in at least one non-percussive operating mode, wherein the drive unit (20) has a percussion mechanism (30) for the percussive driving of the insertion tool (42) in an associated percussion mode, and having a communication interface (400) which is provided for the purpose of communicating with a user guidance unit (60), which can be actuated by a user, and is designed to receive, from the user guidance unit (60), changeover instructions (608, 610) for changing over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode in an applicationspecific manner, wherein the user guidance unit (60) is at least partially integrated in the hand-held power tool (10) and is at least partially in the form of an external separate component (300), characterized in that the user guidance unit (60) has at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) on the hand-held power tool (10) for initiating a changeover operation for changing over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode, wherein the communication interface (400) is designed to transmit a control signal to the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) in order to make it possible for the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) to generate a changeover instruction (608, 610) for initiating a changeover operation for changing over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode.
2. Hand-held power tool according to Claim 1, characterized in that the user guidance unit (60) has a mobile computer (600), in particular a mobile computer (600) in the form of a smartphone or a tablet computer.
3. Hand-held power tool according to either of the preceding claims, characterized in that the user guidance unit (60) has an interactive program (806, 808), in particular a smartphone app, for communicating with the communication interface (400).
4. Hand-held power tool according to one of the preceding claims, characterized in that the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) is provided with an illumination means (510, 512, 514), and the control signal is designed to activate the illumination means (510, 512, 514) to visualize the changeover instruction (608, 610) for initiating a changeover operation for changing over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode.
5. Hand-held power tool according to one of the preceding claims, characterized in that the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) is in the form of a switch or button.
6. Hand-held power tool according to one of the preceding claims, characterized in that the at least one operating element (64, 66, 502, 504, 506) has a display (530), and the control signal is designed to generate an indication for visualizing the changeover instruction (608, 610) for initiating a changeover operation for changing over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode on the display.
7. Hand-held power tool according to Claim 6, characterized in that the display (530) is in the form of a touchscreen.
8. Hand-held power tool according to one of the preceding claims, characterized in that the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) can be actuated to initiate a changeover operation for changing over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode and has a sensor (820) which is designed to transmit an actuation signal (817) to the communication interface (400) when the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) is actuated.
9. Hand-held power tool according to one of the preceding claims, characterized in that an actuating motor (104) is provided and is designed to change over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode when activated.
10. Hand-held power tool according to Claim 9, characterized in that the actuating motor (104) can be activated by actuating the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606).
11. Hand-held power tool according to Claim 10, characterized in that the communication interface (400) is designed to transmit a control signal to the actuating motor (104) for the purpose of activating the actuating motor (104).
12. Hand-held power tool according to one of the preceding claims, characterized in that the communication interface (400) is designed to transmit a control signal to actuators (801, 802, 803) of the hand-held power tool (10), wherein at least one actuator (801, 802, 803) is designed to change over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode when activated by the communication interface (400).
13. Hand-held power tool according to one of the preceding claims, characterized in that the communication interface (400) is in the form of a wireless transmission module (401), in particular in the form of a radio module (405) for wireless communication by means of the Bluetooth standard.

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