EP3389942B1 - 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-striking operating mode, the drive unit having a striking mechanism for driving the insert tool in an assigned striking mode, and the drive unit having an actuatable switching ring for switching the drive unit between the at least one non-striking operating mode and the assigned striking mode is assigned.

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

A handheld machine tool with a striking mode and a non-striking operating mode is in DE 10 2012 208 913 A1 disclosed.

Disclosure of the invention

The present invention relates to a new hand-held power tool with a drive unit for driving an insert tool in at least one non-striking operating mode, the drive unit being a striking mechanism for driving the insert tool in an assigned striking mode and the drive unit is assigned an actuatable switching ring for switching the drive unit between the at least one non-striking operating mode and the assigned striking mode. An actuator is provided, which is designed to actuate the actuatable switching ring for switching the drive unit between the at least one non-striking operating mode and the assigned striking mode when activated.

The invention thus makes it possible to provide a hand-held power tool, in which at least the striking mechanism can be comfortably activated or deactivated by a user, whereby further ease of use may possibly be facilitated. A fully automatic activation or deactivation can also be implemented depending on an application scenario of the handheld power tool.

According to one embodiment, the actuatable shift ring is assigned a position detection unit which is designed to detect a respectively current switching position of the actuatable shift ring.

This allows the current switching position of the switching ring e.g. can be recorded and evaluated by complex electronics or at least displayed to a user.

The actuatable switching ring can preferably be rotated at least between a first and a second switching position, the first switching position being assigned to the at least one non-striking operating mode and the second switching position being assigned to the associated striking mode, and the position detection unit being axially displaceable at least between a first and a second detection position is, wherein the first detection position for the detection of the first switching position and the second detection position is designed for the detection of the second switching position.

As a result, a reliable switching process between the non-striking operating mode and the striking mode is possible by means of a simple rotational movement of the switching ring.

The actuatable switching ring preferably has a link path connected to the position detection unit, which is designed for the axial displacement of the position detection unit when the actuatable switching ring is actuated.

As a result, there is a structurally simple, purely mechanical coupling between the switching ring and the position detection unit, which enables reliable position detection of the switching ring.

The position detection unit preferably has a guide element and a display element, the guide element engaging at least in sections in the link path and the display element being designed to display a respectively detected switching position of the actuatable switching ring.

On the basis of the display element, the current switching position of the switching ring detected by the position detection unit can be visually output to a user in a simple manner.

A linear sensor is preferably assigned to the position detection unit and is designed to detect a respectively current detection position of the position detection unit.

As a result, the respective detection position of the position detection unit can also be electronically processed in addition to the visual output to the user. The further processing can take place digitally and / or analogously.

An angle sensor is preferably assigned to the position detection unit for detecting a current switching position of the actuatable switching ring.

In this way, a current rotational or angular position of the switching ring can be recorded directly.

The actuatable switching ring preferably has deactivation elements for deactivating the striking mechanism in the at least one non-striking operating mode.

This provides a structurally simple, mechanically reliable switchover between the at least one non-striking operating mode and the striking mode.

According to one embodiment, a blocking element is provided which can be blocked in at least one predetermined blocking position, wherein blocking the blocking element in the at least one predetermined blocking position corresponds to deactivating the assigned beat mode.

As a result, the switchability between the different operating modes of the handheld power tool can be achieved with a comparatively low design effort.

The deactivation elements are preferably designed to apply the blocking member in the at least one non-striking operating mode to the at least one predetermined blocking position in order to block the blocking member in the at least one predetermined blocking position in the at least one non-striking operating mode to deactivate the assigned striking mode to enable.

This ensures that the handheld power tool is reliably locked in the at least one non-striking operating mode and thus prevents the uncontrolled activation of the striking mode.

According to one embodiment, the blocking member is movable in the assigned striking mode between the predetermined blocking position and at least one limiting position, so that release of the blocking member blocked in the predetermined blocking position corresponds to activation of the assigned striking mode.

This provides reliable activation and maintenance of the striking mode until the operating mode of the handheld power tool changes.

The striking mechanism is preferably designed in the manner of a latch mechanism.

This gives the striking mechanism a compact, robust construction.

According to one embodiment, an operating unit is provided for switching between the at least one non-striking operating mode and the assigned striking mode.

In this way, at least manual switching between the non-striking operating mode and the striking mode can be implemented.

The operating unit preferably has a switch, a key and / or a touch-sensitive screen for switching between the at least one non-striking operating mode and the assigned striking mode.

As a result, there are many possible types of interaction of a user with the handheld power tool.

The control unit preferably has at least one display element for displaying a respectively set operating mode.

As a result, a feedback of a current operating status to the user is possible.

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 with reference to 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 tool from Fig. 1 according to section line II-II of Fig. 1 ,

Fig. 3

a perspective view of a switching ring of the hand tool from Fig. 2 ,

Fig. 4

a plan view of an enlarged longitudinal section of the hand machine tool of Fig. 1 according to the section line IV-IV of Fig. 1 ,

Fig. 5

a perspective view of a tool system consisting of the hand machine tool of Fig. 1 and an operating unit according to a first embodiment,

Fig. 6

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

Fig. 7

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

Fig. 8

a block diagram of the tool system of Fig. 5 with the handheld power tool and the mobile computer from Fig. 5 ,

Fig. 9

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

Fig. 10

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

Description of the embodiments

Fig. 1 shows a hand-held power tool 10 with a tool housing 12 and a striking mechanism 30, which is designed as an example as a cordless hammer drill screwdriver, which can preferably be mechanically and electrically connected to a battery pack 80 for mains-independent power supply. However, it should be pointed out that the present invention is not to be seen as a cordless hammer drill, but rather can be used with different hand-held machine tools in which the hammer mechanism 30 can be used, such as an impact screwdriver or an impact drill. This is also irrespective of whether the hand machine tool 10 is non-electrically or electrically operable, ie network-dependent or network-independent or battery-powered.

A drive unit 20 for driving an insert tool 42 in at least one non-striking 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 transmission (90 in. Not shown here) Fig. 2 ), a striking mechanism 30 merely indicated here for the striking drive of the insert tool 42, for example accommodated in a tool holder 40, in a striking mode of the hand-held power tool 10 and an optional torque clutch (72 in Fig. 2 ) on. The drive motor 22, the switchable transmission (90 in Fig. 2 ), the optional torque coupling (72 in Fig. 2 ), the striking mechanism 30 and the tool holder 40 are illustratively arranged rotationally symmetrically to a longitudinal central axis 50 of the drive unit 20. The striking mechanism 30 is preferably constructed as a so-called latch mechanism 32. The optional torque clutch (72 in.) Is preferably provided by means of a setting ring 70 that can preferably be rotated about the longitudinal central axis 50 Fig. 2 ) adjustable in steps so that a maximum available torque on the tool holder 40 can be limited to a maximum value. The tool holder 40 is here only exemplarily designed as a quick-action clamping device 44 with a rotatable clamping ring 46 for the radial clamping of the insert tool 42 with the aid of three clamping jaws 48 as an example. The preferably replaceable 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 stepless speed control of the electric drive motor 22. Furthermore, an optional, preferably radiating in the direction of the tool holder 40, on and off Switchable lighting device 18 is provided for illuminating a working field located in the area 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 hand power tool 10. The direction of rotation switch 24 is preferred for actuation transversely displaceable to the longitudinal central axis 50 in the tool housing 12.

The switchable transmission (90 in Fig. 2 ) of the handheld power tool 10 can be switched between at least a first and a second gear stage. The first, preferably slow gear stage is preferably assigned to the non-striking operating mode, for example a screwing mode, and the second, preferably faster gear stage is assigned to a drilling mode and / or the striking mode. However, further gear steps can also be realized, so that, for example, the drilling mode is assigned to the second gear step and the impact mode to a third gear step, etc.

According to one embodiment, at least one user guidance unit 60 is provided, which is used 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. With active user guidance, a user of handheld power tool 10 is preferably guided by visual, auditory and / or haptic instructions, notes or switching instructions for switching between the non-striking operating mode and the striking mode, while with passive user guidance, a corresponding switching operation is carried out automatically by the handheld power tool 10 is carried out and this is preferably only displayed to the user. Exemplary implementations of active and passive user guidance are described in more detail below. For example, a vibration element, such as, for example, an electric motor with an eccentric or the like, can be provided in order to achieve feedback that the user can also perceive haptically as to whether the handheld power tool 10 is in the non-striking operating mode or in the striking mode.

The user guidance unit 60 preferably has at least one manually operable operating unit 62 with at least one, here illustratively, however, 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-striking operating mode and the beat mode are trained. The two operating elements 64, 66 can be used, for example, as electrical switches, Pushbuttons, latching switches, keys, pushbuttons, for gesture control and / or with a touch-sensitive display, such as a touch-sensitive screen or a touchscreen, which are not shown here for the better graphic overview. Furthermore, the two control elements 64, 66 can have optical display elements or lighting elements (cf. in particular 520, 521, 522 in Fig. 6 ) to be assigned to the display of the respectively set operating mode of the hand-held 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 displays. 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 in 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 optimum 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 alternatively can also be a component of the user guidance unit 60. The communication interface 400 is preferably designed to receive switching instructions for the application-specific switching of the handheld power tool 10 between the non-striking operating mode and the striking mode, at least from the user guidance unit 60 or the operating unit 62. In this case, the communication interface 400 is at least designed 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 control elements 64, 66 conversely transmit an actuation signal to the communication interface 400 or to (control) electronics, not shown here, to inform that the user has actually carried out the corresponding application-specific switchover. Preferably, the generation of a switching instruction for initiating a switching process between the striking mode and the non-striking operating mode is made possible, for example, 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 using the Bluetooth standard. However, the transmission module 401 can also be used for any other wireless and / or wired communication, e.g. via WLAN, WiFi and / or LAN.

Fig. 2 shows the hand machine tool 10 of 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 clamping jaws 48 can be moved radially by means of the clamping ring 46 of the quick-action clamping device 44 which can be rotated about the longitudinal central axis 50. The hand switch 16 for actuating an electrical on / off switch 17 is located in the handle 14 of the tool housing 12. A drive shaft 34 of the drive motor 22 illustratively 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 gear 90, the optional torque clutch 72 and the striking mechanism (30 in Fig. 1 and Fig. 4 ) are arranged, for example, rotationally symmetrically to the longitudinal center axis 50 and axially offset from one another within the tool housing 12 of the handheld power tool 10.

Preferably, coaxial to the longitudinal center axis 50 in the area of the torque clutch 70 is rotatable in the tool housing 12 by means of an actuating unit 102 arranged switching ring 100 is provided. This is preferably ring-shaped, that is to say at least approximately hollow-cylindrical, but can alternatively also be designed, for example, in the form of a segment of a circle or an arc.

The actuating unit 102 preferably comprises an electric servomotor 104 and an actuating gear 106 driven by the latter with 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 simultaneously reducing the speed of the pinion 108.

The switching ring 100 preferably has a radially outward toothing 114 on an underside 110 facing the handle 14, which is preferably in constant engagement with the pinion 108 of the actuating unit 102. The underside toothing 114 of the switching ring 100 preferably extends 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 can thus be rotated or rotated by motor with the help of the actuating unit 102 or the servomotor 104 according to one embodiment in an angular range of up to 90 ° or ± 45 ° about the longitudinal central axis 50. Alternatively, e.g. a larger angular range can be realized with the correspondingly adapted toothing 114. For example, the toothing 114 can completely encompass the switching ring 100, i.e. in the manner of a 360 ° interlocking, and thus allow an unlimited angular range.

The switching ring 100 preferably has a circumferential first link track 116, which is illustratively designed in the form of a ramp and in which a switching rod 118 is guided. A shift bracket 120 made of a bent wire is preferably articulated to the shift rod 118 and is preferably coupled to a shift ring gear of the transmission 90 which is concealed here. Therefore, by energizing the servomotor 104 with a certain direction of rotation, a motorized gear change of the switchable transmission 90 can be effected. Furthermore, at least one and here exemplarily three, preferably evenly spaced deactivation elements 122 are formed on the switching ring 100, of which only two deactivation elements are visible here. The deactivation elements 122 are exemplary as integral to the switching ring 100 molded cams 124, which are directed axially in the direction of the tool holder 40 and which are used to activate or deactivate the striking mode or to switch the striking mechanism 30, which is not visible here, by means of a blocking element (200, in Fig. 4 ) serve.

According to one embodiment, the switching ring 100 can be rotated about the longitudinal central axis 50 at least into a first and a second switching position, the first switching position or angle of rotation position being e.g. the non-striking operating mode and the second switching position is assigned to the striking mode of the hand power tool 10. 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 sliding track 132 is preferably introduced circumferentially into the switching ring 100, which illustratively runs at least approximately rectilinearly and transversely to a cross section of the switching ring 100. A pin-like guide element 134, which is formed on the underside of a plate-shaped base body 133 of the position detection unit 130 and engages in the link path 132 of the switching ring 100. As a result, any 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 which is directed away from the guide element 134. The pointer-like display element 136 allows e.g. in connection with a scale element attached in the vicinity of the display element 136 in the area of the tool housing 12, which is not shown in the better graphic overview, then at least a purely mechanical display for the user whether the handheld power tool 10 is in the non-striking operating mode or in the striking mode located.

In the axial position of the position detection unit 130, symbolized by a solid black line, the position detection unit 130 is in a first axial detection position, while the position detection unit 130 is in the position with a Dashed line indicated position is 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 designed to detect the current axial detection position of the position detection unit 130. In this case, the linear sensor 138 preferably detects the linear movement of the pointer-like display element 136 of the position detection unit 130 oriented perpendicular to the longitudinal central axis 50 and thus indirectly the respective switching or rotating 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 ensured.

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

The preferably non-contact, electronic linear sensor 138 and / or the angle sensor 145 make it possible to detect the switching position of the switching ring 100 electronically with high accuracy, for example to process it further by means of the electronics 140, and thus complex, automatically running control and / or regulation processes with the help of the actuating unit 102. The electronics 140 preferably control the drive motor 22 and / or the lighting device 18 of FIG Fig. 1 , The drive motor 22 preferably depending on a direction of rotation switch (24, in Fig. 1 ) transmitted direction signal is controlled. Prefers the hand switch 16 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 removed from the battery pack (80, in Fig. 1 ) powered.

Fig. 3 shows the switching ring 100 of the hand machine tool 10 of Fig. 2 who 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 outward toothing 114, which is preferably formed in one piece with the switching ring 100 and here extends only by way of example on the circumference over an angle α of approximately 60 °, in order to thus pivot the switching ring by ± 30 ° starting from the one illustrated here Allow position. In the area of one of the tool holders 40 of Fig. 2 facing end 125 of the switching ring 100, the three deactivation elements 122, which are designed as cams 124 by way of example, are preferably formed in one piece with the switching ring 100, and are preferably arranged at 120 ° circumferentially evenly offset from one another. Illustratively, the cams 124 each have a base area, for example an annular sector-shaped base, 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 peripheral 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 approximately corresponds, by way of example, to that of a rectangular section from a hollow cylinder. In the extension 127 are the two, preferably radially completely penetrating this and running approximately transverse to the longitudinal central axis 50 guide paths 116, 132 of Fig. 2 brought in.

Illustratively, three setting cams 129 are also formed in the area of an approximately cylindrical inner surface 128 of the switching ring 100, which are used to set one of the optional torque clutch (72 of Fig. 2 ) maximum transferable torque or a response torque of the torque clutch. Of the three adjustment cams 129, only a single adjustment cam is visible here. The setting cams 129 connect axially to the cams 124 for activating or deactivating the striking mode, but are preferably offset circumferentially to these and point in FIG Direction of the rear side 126 of the switching ring 100. Furthermore, the setting cams 129 are flush with the cams 124 in the radial direction.

Fig. 4 shows the preferably switchable transmission 90 from 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 transmission housing 94: a front planetary stage 160 on the drive motor side, a middle planetary stage 162 and one of the tool holder 40 of Fig. 2 closest planetary stage 164.

The front planetary stage 160 has, by way of example, a sun gear 166, at least two planet gears which are not designated for the sake of a better overview of the drawing, a planet carrier 168, and a ring gear 170 which is axially immovable and non-rotatably arranged in the gear housing 94. The sun gear 166 is the rotating drive for the planetary gear 92 front planetary stage 160 at least rotatably, for example by a positive connection or the like, connected to the armature shaft 34 of the drive motor 22, or designed as an output pinion 171 of the armature shaft 34. Correspondingly, the middle planetary stage 162 has, for example, a sun gear 172 - which is formed in one piece on the planet carrier 168 of the front planetary stage 160 - at least two planet gears (not designated), a planet carrier 174 and the peripheral, axially displaceable ring gear 176. The rear planetary stage 164 has, for example, a central one 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 one planet carrier 180. In addition, in the area of the rear planetary stage 164, an axially immovable and non-rotatable ring gear 182 is shown in the gear housing 94, one of which Slip clutch not described is assigned. The switching bracket 120 preferably engages in the switching ring gear 176 Fig. 2 so that by means of the actuating unit 102 of Fig. 2 rotatable switching ring 100 (see esp. Fig. 2 ) A motor-driven gear change, for example between at least one fast and one slow gear stage of the switchable transmission 90, can be brought about by axially displacing the switching ring gear 176 of the middle planetary stage 162.

One preferably rotatable in a first and a second bearing point 52, 54 in the tool housing 12 of Fig. 2 The driven spindle 150 is supported by means of the switchable planetary gear 92 and the optional torque clutch 72 following 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 from Fig. 2 with the two clamping jaws 48 visible here, the output spindle 150 is preferably arranged in a rotationally fixed manner on a threaded section 152. The clamping jaws 48 are directed radially inward by means of the clamping ring 46 of the quick-clamping device 44 of 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 the latter in a rotationally fixed manner.

The amount of a maximum torque that can be transmitted by the optional torque clutch 72 is set by means of the adjusting ring 70 Fig. 1 adjustable by the user. The detailed structural design of such a torque clutch is sufficiently familiar to the person skilled in the art from the prior art, so that a more detailed description can be dispensed with here.

According to one embodiment, a blocking member 200 is provided. This is exemplarily configured as a bearing bridge 202 with an approximately S-shaped cross section with 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 central axis 50 and between the legs 204, 206 there is preferably a straight central section, which is not shown for the sake of clarity in the drawing and runs parallel to the longitudinal central axis 50.

The hand-held power tool 10 from is in the rotational position or rotational angle position of the switching ring 100 illustrated here Fig. 1 in the non-striking mode of operation. In this, the first leg 204 of the bearing bracket 202 preferably axially abuts the cam 124 or the deactivation element of the switching ring 100, while the second bearing point 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 thus in a blocking position in the position shown 208 and the striking mode is deactivated or the non-striking operating mode of the hand power tool 10 is active.

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

Fig. 5 FIG. 12 shows a tool system 1000 that the handheld power tool 10 of FIG Fig. 1 having. The handheld power tool 10 is connected to the user guidance unit 60 from Fig. 1 provided, which here preferably has an operating unit 500 for manually setting the non-striking operating mode and the striking mode. The tool housing 12 of the handheld power tool 10 contains, among other things, the electric drive motor 22 and the switchable gear 90 for rotatingly driving the tool holder 40.

The control unit 500 is preferably equipped with at least one, but illustratively three control elements 502, 504, 506 for switching between the non-striking operating mode and the striking mode of the hand tool 10. As an example, the control element 502 is provided for activating the screwing mode, the control element 504 for setting a drilling mode and the control element 506 for selecting the impact mode, the control elements 502, 504, 506 having, for example, graphic symbols or pictograms corresponding to the operating modes. The control elements 502, 504, 506 are preferably arranged on a circuit board 508 or printed circuit board. The control unit 500 is preferably at least partially integrated into the handheld power tool 100. Furthermore, the control unit 500 can only use one here be equipped with dashed lines (LC) display 530, the control signal described above being designed, for example, to display 530 a display to visualize a switching instruction or a request to initiate a switching process for switching the drive unit 22 from the non-striking Operating mode to generate the beat 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, the operating unit 500 can be dispensed with, as explained above, in particular if this can be implemented by the mobile computer 600. To display a set operating mode, the handheld power tool 10 preferably additionally has the display 530, the user guidance unit 60 forming the tool system 1000 together with the 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. The display 601 preferably has at least one, but here illustratively three control elements 602, 604, 606 for entering at least one operating mode of the hand power tool 10. Are exemplary in Fig. 5 The control elements 602, 604, 606 are shown on the display 601 as control panels or icons or pictograms, but could also be implemented as switches and / or buttons.

In the event that the user guidance unit 60 comprises 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-striking operating mode on the display 601 and generate or display the beat mode. Here, concrete (action) instructions are preferred The display 601 shows, for example, an instruction as to which operating mode is to be set for a given operation, which a user of the handheld power tool 10 can then subsequently set, for example via the control unit 500 on the handheld power tool 10. Here, the control elements 502, 504, 506 on the handheld 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. 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 a setting of the respective operating mode in such a constellation then preferably in each case automatically, preferably via the electromotive actuating unit 102 or the servomotor 104 of Fig. 2 , is made. It should also be noted that the in Fig. 5 described, exemplary implementations of the user guidance unit 60 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 control unit 500 of Fig. 5 with the controls 502, 504, 506, and the actuator 102 from Fig. 2 . The control unit 500 preferably has at least one, but here, by way of example, three electrical switching elements 535, 536, 537. Three lighting elements 520, 521, 522 are preferably provided to display a respectively set operating mode (cf. Fig. 5 ). In this case, 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, switching element 535 and lighting element 520 are assigned to control element 502 (screw mode), switching element 536 and lighting element 521 are assigned to control element 504 (drilling mode), and switching element 537 and lighting element 522 are assigned to control 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 a (LC) display, preferably with touchscreen functionality, and / or in the manner of a mobile computer, with a symbol to be actuated by the user lighting up on the display or icon and / or can blink.

The operating unit 500 preferably interacts with the actuating unit 102 constructed from the servomotor 104 and the servomotor gear 106, which in turn has the rotatable or pivotable switching ring 100 (cf. 2 to 4 ) is mechanically connected, so that the user can use a finger 1200 to conveniently operate an operating mode of the handheld power tool 10 from Fig. 1 can adjust. The current position of the switching ring 100 is in each case determined by the position detection unit (cf. in particular Fig. 2 ) recorded, which shifts axially proportional to the current (rotation) angle of the switching ring 100 along a double arrow 1201.

The electrical circuit board 508 of the operating unit 500 preferably has an elastic film cover 540 in the manner of a membrane keyboard for protection 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 below it to be actuated smoothly . The lighting elements 520, 521, 522 can also be placed directly below the control elements 502, 504, 506 and the symbols or pictograms respectively 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 hand-held power tool in order to achieve optimal work results in a specific application scenario can be visualized by lighting up the corresponding symbol.

Fig. 7 shows the control unit 500 of Fig. 5 which, according to one embodiment, has an adjusting element 700 for manual selection of the respective operating mode. The tool housing 12 from Fig. 2 includes, among other things, the drive motor 22, the hand switch 16, the switchable gear 90, the rotatable switching ring 100, the tool holder 40 and the communication interface 400 integrated into the tool housing 12 in the region of the handle 14.

A lever-like setting element 700 is preferably integral to the actuatable switching ring 100 of 2 to 4 formed and protrudes radially in relation to the longitudinal center axis 50 from a recess 702 in the control unit 500. By pivoting the setting element 700 in the direction of a double arrow 704, the switching ring 100 is preferably rotated, as a result of which the respective operating mode can be set directly. Analogous to Fig. 5 and Fig. 6 the control elements 502, 504, 506, which preferably do not have any switching functionality here, 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 an example of a non-striking operating mode of the hand power tool 10 of FIG Fig. 1 , especially the screw mode.

Fig. 8 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 in turn comprises, among other things, the drive unit 20, which has the drive motor 22, the gear 90, the striking mechanism 30 and the optional torque coupling 72.

Electronics 140 from 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, for changing gear of the transmission 90, the actuator 802 for activating / deactivating the striking mechanism 30 and the actuator 803 for setting a torque M which can be transmitted by the optional torque clutch 72, preferably When one of the three actuators 801, 802, 803 is activated, the electronics 140 emits an activation signal to an associated lighting means 510, 512, 514 or at least one of the lighting elements 520, 521, 522 (cf. in particular Fig. 5 and Fig. 6 ) further. Alternatively or in addition, the activation signal can also be designed as a signal tone or 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 hand tool 10. The first program 806 is preferably designed to set special applications, e.g. to screw a screw into a softwood or hardwood. In this case, the program 806 preferably determines the operating parameters that are most suitable for the respective application, in order to achieve optimal work results, e.g. a rotational speed, a direction of rotation, a torque, a gear stage and / or an impact operation requirement, and forwards these to the communication interface 400 of the handheld power tool 10.

In this case, the communication interface 400 is preferably designed to transmit a control signal to the actuators 801, 802, 803 of the hand power tool 10, at least one actuator 801 being designed to switch the switchable transmission 90 between at least two gear stages when activated by the communication interface 400 . Furthermore, for example, the actuator 802 is designed 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. Correspondingly, 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 activates or controls the respective assigned actuators 801, 802, 803.

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

Alternatively or additionally, the manual power tool 10 can be used to manually set a gear stage and / or an operating mode or for manually setting operating parameters, at least one signal generator 814, 815, 816 or at least one of the operating elements 502, 504, 506 (cf. Fig. 5 and Fig. 6 ) exhibit. It can be provided here that at least one signal generator 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 generators 814, 815, 816 are shown. The signal generator 814 is designed, for example, to change gear, the signal generator 815 serves to activate and / or deactivate the striking mechanism 30, and the signal generator 816 has the function of adjusting the torque of the optional torque clutch 72.

The respective signal generator 814, 815, 816 is preferably designed to send a control signal to the electronics 140, depending on the application or input, so that the electronics 140 can activate and / or control the respective actuators 801, 802, 803 accordingly. The signal generators 814, 815, 816 are preferably designed as electrical signal generators, in particular as switches or buttons, but can also be used as any other signal generators, e.g. be designed 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 - shows switching instructions or requests for application-specific switching between the non-striking operating mode and the striking 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 control 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 communicate interface 400 and / or the mobile computer 600 (cf. in particular Fig. 6 ) to transmit an actuation signal as a feedback or as feedback to the electronics 140 when the at least one control element 64, 66 is actuated by the user, 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 configured as a temperature sensor, acceleration sensor, magnetic field sensor, 3D position sensor, etc. A further program or software or smartphone app can be stored, which is designed to check the settings of the electronics 140 or the handheld power tool 10 and, if necessary, to adapt them. For example, in the event of thermal overheating of the drive motor 22, a warning signal can be issued and / or the impact mode can be deactivated. Furthermore, in the event of a thermal overload of the drive motor 22, an automatic gear shift can be triggered due to an excessive torque at the tool holder.

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, for example, a torque, a speed, an electrical voltage, an electrical Current and / or other data to the handheld power tool 10 is formed. In the case of an adapter interface 826 designed 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 rangefinder and transmit measured values or parameters 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, and this or the display can 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, wherein the drive motor 22 is preferably controlled as a function of a direction of rotation signal transmitted by the direction of rotation switch 24. The hand 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 is supplied with current by the battery pack 80.

Fig. 9 shows the hand machine tool 10 of Fig. 1 with the tool housing 12 and the handle 14 integrally molded thereon on the underside and the optional communication interface 400 positioned therein, the hand switch 16, the direction of rotation switch 24 and the tool holder 40. The handheld power tool 10 here has, for example, an operating unit 900 which is at least for switching between the non-striking operating mode and the striking mode, deviating from all the embodiments described above, has a toggle-type rotary switch 902.

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

By turning 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 have a maximum angle of rotation of e.g. Execute 180 °. The lighting means 904, 906, 908 can if necessary. serve to directly illuminate translucent graphic symbols for the screwing mode, drilling mode and impact mode at least in certain 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, for example by means of electronics 140 and / or communication interface 400, that lighting means 904, 906, 908 are activated, which indicates the operating mode that differs from the current operating mode, is currently preset on the machine side and therefore must be set, in which the user uses the hand-held power tool 10 to achieve the best possible results in a specific application by turning the rotary switch 902 in one of the two Switch directions of the double arrow 910. In addition, a further lighting means 912 can be integrated in the at least partially transparent rotation direction switch 24, in order to signal the user, for example, the need to change the direction of rotation of the tool holder 40 and thus of the insert tool. This can be the case, for example, if the electronics 140 detects a rapid increase in torque, which indicates, for example, a drill which is stuck or seized in the workpiece and which can preferably be remedied by at least a brief change in the direction of rotation of the tool holder 40.

Thus, the four lighting means 904, 906, 908, 912 of the hand power tool 10 serve to initiate a complex user action on the part of the user in the context of passive user guidance, while at the same time the type of actuation required and / or the operating element itself to be actuated, here, for example, turning the Rotary switch 902 or the transverse axial displacement of the direction of rotation switch 24 with respect to the longitudinal center axis 50 is conveyed to the user in a simple, intuitively perceptible manner.

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 exemplarily illustrated and textually by means of one of the programs (806, 808 in Fig. 8 ) or a smartphone app or a tablet app.

The first switchover instruction 608 or prompt should, for example, cause the user to deactivate the striking mode or to switch to the at least one non-striking 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 clarification by a symbol 612 or a pictogram and / or an arrow 614, which gives the user a clear indication of the operating element 64, 66 to be operated on the handheld power tool 10 in the specific application.

The second switchover instruction 610 or request is sent to the user, for example to induce the user to insert a specific insert tool 42, which is optimally suited for the application process currently pending, such as a wood drill, a metal drill or a stone drill or the like, into the tool holder 40 of the handheld power tool 10 from 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 case or the work task to be processed, so that a suitable switchover instruction 610 or request then follows it can pass, which, for example, specifies the type of insert tool to be inserted in the tool holder.

Claims (15)

1. Handheld power tool (10) comprising a drive unit (20) for driving an insert tool (42) in at least one non-percussive operating mode, wherein the drive unit (20) has a percussion mechanism (30) for percussively driving the insert tool (42) in an associated percussion mode, and wherein the drive unit (20) has an associated operable switching ring (100) for switching over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode, characterized in that an actuating motor (104) is provided, which is designed to operate the operable switching ring (100) for switching over the drive unit (20) between the at least one non-percussive operating mode and the associated percussion mode in the event of activation.
2. Handheld power tool according to Claim 1, characterized in that the operable switching ring has an associated position detection unit (130) which is designed to detect a respectively current switching position of the operable switching ring (100).
3. Handheld power tool according to Claim 2, characterized in that the operable switching ring (100) can be rotated at least between a first and a second switching position, wherein the first switching position is associated with the at least one non-percussive operating mode and the second switching position is associated with the associated percussion mode, and wherein the position detection unit (130) is axially displaceable at least between a first and a second detection position, wherein the first detection position is designed for detecting the first switching position and the second detection position is designed for detecting the second switching position.
4. Handheld power tool according to Claim 2 or 3, characterized in that the operable switching ring (100) has a slotted link path (132) which is connected to the position detection unit (130) and is designed for axially displacing the position detection unit (130) when the operable switching ring (100) is operated.
5. Handheld power tool according to Claim 4, characterized in that the position detection unit (130) has a guide element (134) and a display element (136), wherein the guide element (134) engages into the slotted link path (132) at least in sections, and the display element (136) is designed to display a respectively detected switching position of the operable switching ring (100).
6. Handheld power tool according to one of Claims 2 to 5, characterized in that the position detection unit (130) has an associated linear sensor (138) which is designed to detect a respectively current detection position of the position detection unit (130).
7. Handheld power tool according to one of Claims 2 to 5, characterized in that the position detection unit (130) for detecting a respectively current switching position of the operable switching ring (100) has an associated angle sensor (145).
8. Handheld power tool according to one of the preceding claims, characterized in that the operable switching ring (100) has deactivation elements (122) for deactivating the percussion mechanism (30) in the at least one non-percussive operating mode.
9. Handheld power tool according to one of the preceding claims, characterized in that a blocking element (200) which can be blocked in at least one prespecified blocking position (208) is provided, wherein blocking of the blocking element (200) in the at least one prespecified blocking position (208) corresponds to deactivation of the associated percussion mode.
10. Handheld power tool according to Claim 8 and 9, characterized in that the deactivation elements (122) are designed to act on the blocking element (200) in the at least one non-percussive operating mode in the at least one prespecified blocking position (208) in order to allow blocking of the blocking element (200) in the at least one prespecified blocking position (208) for deactivating the associated percussion mode in the at least one non-percussive operating mode.
11. Handheld power tool according to Claim 9 or 10, characterized in that the blocking element (200) can be moved between the prespecified blocking position (208) and at least one limiting position (212) in the associated percussion mode, so that releasing of the blocking element (200) which is blocked in the prespecified blocking position (208) corresponds to activation of the associated percussion mode.
12. Handheld power tool according to one of the preceding claims, characterized in that the percussion mechanism (30) is designed in the manner of a latching percussion mechanism (32).
13. Handheld power tool according to one of the preceding claims, characterized in that an operator control unit (62) for switching over between the at least one non-percussive operating mode and the associated percussion mode is provided.
14. Handheld power tool according to one of the preceding claims, characterized in that the operator control unit (62) has a switch, a pushbutton and/or a touch-sensitive screen for switching over between the at least one non-percussive operating mode and the associated percussion mode.
15. Handheld power tool according to Claim 13 or 14, characterized in that the operator control unit (62) has at least one display element for displaying a respectively set operating mode.

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