WO2017102513A1

WO2017102513A1 - Hand-held power tool comprising a percussion mechanism

Info

Publication number: WO2017102513A1
Application number: PCT/EP2016/080123
Authority: WO
Inventors: Florian Bantle; Thomas Duerr; Juergen Gairing
Original assignee: Robert Bosch Gmbh
Priority date: 2015-12-18
Filing date: 2016-12-07
Publication date: 2017-06-22
Also published as: DE102015226091A1; EP3389942A1; EP3389942B1

Abstract

In a hand-held power tool (10) comprising a drive unit (20) for driving a working tool (42) in at least one non-percussive mode of operation, wherein the drive unit (20) comprises a percussion mechanism (30) for the percussive operation of the working tool (42) in an associated percussion mode, and wherein the drive unit (20) comprises a actuatable switching ring for switching the drive unit (20) between the at least one non-percussive mode of operation and the associated percussion mode, a servomotor is provided to actuate upon activation the actuatable switching ring for switching the drive unit (20) between the at least one non-percussive mode of operation and the associated percussion mode.

Description

description

title

Hand tool with a percussion state of the art

The present invention relates to a power tool with a drive unit for driving an insert tool in at least one non-impact mode of operation, wherein the drive unit comprises a striking mechanism for beating drive the insert tool in an associated impact mode, and wherein the drive unit is an operable switching ring for switching the drive unit between the at least one non-beating operating mode and the associated beat mode is assigned.

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

Disclosure of the invention

The present invention relates to a novel hand tool with a drive unit for driving an insert tool in at least one non-impact mode of operation, wherein the drive unit is a striking mechanism for striking the insert tool in an associated impact mode. and wherein the drive unit is associated with an operable switching ring for switching the drive unit between the at least one non-impacting operating mode and the associated impact mode. A servomotor is provided which is adapted to actuate the operable switching ring for switching the drive unit between the at least one non-striking operating mode and the associated beat mode upon activation.

The invention thus makes it possible to provide a portable power tool, in which at least the percussion mechanism can be activated or deactivated in a comfortable way by a motor for a user, the device further facilitating the

Operability if necessary. also a fully automatic activation or deactivation depending on a deployment scenario of the power tool can be realized.

According to one embodiment, a position detection unit is assigned to the operable switching ring, which is adapted to detect a respective current switching position of the operable switching ring.

As a result, the respective current switching position of the switching ring, e.g. be detected and evaluated by a complex electronics or at least brought to a user for display.

The operable switching ring is preferably rotatable at least between a first and a second switching position, wherein the first switching position is assigned to the at least one non-impact operating mode and the second switching position is assigned to the associated impact mode, and wherein the position detection unit is at least between a first and a second detection position is axially displaceable, wherein the first detection position for detecting the first switching position and the second detection position for detecting the second switching position is formed.

As a result, by means of a simple rotational movement of the switching ring, a reliable switching operation between the non-striking operating mode and the beat mode is possible. Preferably, the actuatable switching ring has a link path connected to the position detection unit, which is designed for the axial displacement of the position detection unit upon actuation of the operable switching ring.

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

Preferably, the position detection unit has a guide element and a display element, wherein the guide element engages at least partially in the slide track and the display element is adapted to display a respectively detected switching position of the operable switching ring.

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

Preferably, the position detection unit is assigned a linear sensor, which is designed to detect a respectively current detection position of the position detection unit.

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

Preferably, the position detection unit for detecting a respective current switching position of the operable switching ring is associated with an angle sensor.

As a result, a current rotational or angular position of the switching ring can be detected directly.

The actuatable switching ring preferably has deactivating elements for deactivating the percussion mechanism in the at least one non-striking operating mode. As a result, a structurally simple construction, mechanically reliable switching between the at least one non-impacting operating mode and the impact mode is given. According to one embodiment, a blocking member is provided, which is blockable in at least one predetermined blocking position, wherein a blocking of the blocking member in the at least one predetermined blocking position corresponds to a deactivation of the associated beat mode. As a result, the switchability between the various operating modes of the power tool is achievable with a comparatively simple design effort.

Preferably, the deactivation elements are configured to act on the blocking member in the at least one non-impacting mode of operation in the at least one predetermined blocking position to block in the at least one non-impact mode of operation blocking of the blocking member in the at least one predetermined blocking position to deactivate the associated beat mode to enable.

As a result, a reliable locking of the power tool is ensured in the at least one non-impact mode of operation, thus excluding the uncontrolled activation of the beat mode.

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

As a result, a reliable activation and maintenance of the impact mode is given up to a change of the operating mode of the power tool.

Preferably, the hammer mechanism is designed in the manner of a catch impact mechanism. As a result, a compact, robust construction of the impact mechanism is given.

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

As a result, at least a manual switching between the non-impact operating mode and the impact mode can be realized.

The operating unit preferably has a switch, a button and / or a touch-sensitive screen for switching between the at least one non-impacting operating mode and the associated impact mode. There are many possible ways of interacting with the user

Hand tool given.

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

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

Brief description of the drawings

The invention is explained in more detail in the following description with reference to exemplary embodiments illustrated in the drawings. In the drawings, the same constructive elements with identical functionalities each have the same reference numerals and are usually described only once. Show it:

1 is a perspective view of a hand tool,

2 is a partial longitudinal section of the hand tool of FIG. 1 according to the section line II-II of Fig. 1, 2 is a perspective view of a switching ring of the hand tool of FIG. 2, a plan view of an enlarged longitudinal section of the power tool of FIG. 1 according to the section line IV-IV of FIG.

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

6 is a perspective detail view of the control unit of FIG. 5 and the control unit of FIG. 2,

7 is a partial perspective view of the hand tool of FIG. 1 with a control unit according to a second embodiment, a block diagram of the tool system of FIG. 5 with the power tool and the mobile computer of FIG. 5; FIG.

9 is a partial side view of the hand tool of FIG. 1 with a control unit according to a third embodiment, and an enlarged view of the mobile computer of the tool system of FIG. 5.

Description of the embodiments

1 shows a hand tool 10 having a tool housing 12 and a percussion mechanism 30, which is exemplarily designed as a cordless impact driver, which is preferably mechanically and electrically connected to a battery pack 80 for mains-independent power supply. It should be understood, however, that the present invention is not limited to cordless impact drivers, but rather may be used with various hand tooling machines in which the striking mechanism 30 may be used, such as an impact wrench or percussion drill. This is also independent of whether the hand tools machine 10 is non-electrically or electrically operable, ie network-dependent o- independent of the mains or battery power.

A drive unit 20 for driving an insert tool 42 in at least one non-impact operating mode is preferably arranged at least in sections in the tool housing 12. The drive unit 20 has, by way of example, an electric drive motor 22, a preferably switchable transmission (not shown here) (90 in FIG. 2), a percussion mechanism 30 for striking drive of the insert tool 42 received in a tool holder 40 in a striking mode of the handheld power tool 10 and an optional torque coupling (72 in FIG. 2). The drive motor 22, the shiftable transmission (90 in FIG. 2), the optional torque coupling (72 in FIG. 2), the percussion mechanism 30 and the tool holder 40 are illustratively arranged rotationally symmetrical to a longitudinal central axis 50 of the drive unit 20. The Schlagwerk 30 is preferred as a s.g. Rastenschlagwerk 32 constructed. By means of a preferably locking about the longitudinal central axis 50 rotatable adjusting ring 70 is preferably the optional torque clutch (72 in Fig. 2) adjustable in steps, so that a maximum on the tool holder 40 available torque can be limited to a maximum value. The tool holder 40 is here only exemplarily designed as a quick-release device 44 with a rotatable clamping ring 46 for radial clamping of the insert tool 42 with the aid of exemplarily three clamping jaws 48. The preferably replaceable insert tool 42 may be, for example, a drill or a bit holder with a screwdriver bit.

The tool housing 12 further has an ergonomically shaped handle 14 with a manual 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 the handle 14 a - And switchable illumination device 18 for illuminating a lying in the region of the tool holder 40 of the power tool 10 working field provided. Further, a direction of rotation switch 24 is preferably located on the handle 14 for changing the direction of rotation of the drive motor 22 in order to allow a reversing operation of the power tool 10. The direction of rotation switch 24 is preferred zugt transversely slidably received for actuation to the longitudinal central axis 50 in the tool housing 12.

The shiftable transmission (90 in FIG. 2) of the handheld power tool 10 can be switched over at least between a first and second gear stage. Preferably, the first, preferably slow, gear ratio is the non-impact mode of operation, e.g. a screwing mode, assigned and the second, preferably faster gear stage a Bohrmodus and / or the beat mode. However, other gear ratios can be realized so that e.g. the second-speed drilling mode and the third-speed stepping mode are assigned, and so on.

According to one embodiment, at least one user guidance unit 60 is provided, which serves at least for switching between the non-beating operating mode and the beating mode. The user guidance unit 60 may be designed for active and / or passive user guidance. In active user guidance, a user of the handheld power tool 10 is preferably directed by visual, auditory, and / or haptic instructions, cues to switch between the non-beating mode of operation and the beat mode, while passive user

User guide a corresponding switching operation is performed automatically by the power tool 10 and this is preferably only displayed to the user. Exemplary implementations of active and passive user guides will be described in more detail below. For example, to achieve a haptic perceptible for the user

Feedback on whether the power tool 10 is in the non-impact mode or in the impact mode, a vibration element, such as an electric motor with an eccentric or the like, be provided.

Preferably, the user guide unit 60 at least one manually operable control unit 62 with at least one, here illustratively, however, a first and second, manually operable control element 64, 66, wherein the controls 64, 66 for initiating a switching to switch between see the non-beating Operating mode and the beat mode are formed. The two operating elements 64, 66 can be used, for example, as electrical switches, Button, detent switch, buttons, pushbuttons, for gesture control and / or with a touch-sensitive display, such as a touch-sensitive screen or a touchscreen, be realized, which are not shown the better graphical overview here. Furthermore, the two operating elements 64, 66 can be assigned optical display elements or lighting elements (cf., in particular, 520, 521, 522 in FIG. 6) for displaying the respectively set operating mode of the handheld power tool 10, the display elements preferably having colored or white LED's are constructed. 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 themselves are in the form of a display. Alternatively, other so-called "smart devices" such as 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 configured as an external, separate component (300 in FIG. 5). In this case, the display can be integrated into the handheld power tool 10 and / or arranged externally. Preferably, switching instructions may be displayed on the display to allow a user of the handheld power tool 10 to operate and / or adjust, e.g., for optimum performance. an application-specific operating mode of the power tool 10 to facilitate.

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 that is preferably operable by the user, but alternatively may 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-beating operating mode and the beat mode at least by the user guidance unit 60 or the operating unit 62. In this case, the communication interface 400 is at least configured to send at least one control signal to at least one of the operating elements 64, 66 or to automatically initiate a switching process. In addition, it may be provided that the operating elements 64, 66 conversely transmit an actuation signal to the communication interface 400 or a (control) electronics, not shown here, to notify that the user has actually made the appropriate application-specific switching. In this case, the generation of a switchover instruction for initiating a switchover operation between the beat mode and the non-beating operating mode is preferably made possible, for example, by at least one of the two control 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 wireless module 405 for wireless communication by means of the Bluetooth standard. However, the transmission module 401 may also be used for any other wireless and / or wireline communication, e.g. via WLAN, WiFi and / or LAN.

FIG. 2 shows the handheld power tool 10 of FIG. 1 with the tool housing 12, in which the drive motor 22 is arranged as a 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 are radially displaceable by means of the clamping ring 46, which can be rotated about the longitudinal central axis 50, of the quick-action clamping device 44. In the handle 14 of the tool housing 12 is the manual switch 16 for actuating an electric on / off switch 17. A drive shaft 34 of the drive motor 22 drives illustratively rotating a shiftable transmission 90 for torque and speed adjustment, which preferably designed as a planetary gear 92 and which by way of example has an at least approximately cylindrical gear housing 94. With the aid of the adjusting ring 70, the torque which can be transmitted by an optional torque clutch 72 and which can be called up on the tool holder 40 can be adjusted. The drive motor 22, the gear 90, the optional torque coupling 72 and the here concealed percussion (30 in Fig. 1 and Fig. 4) are exemplary rotationally symmetrical to the longitudinal central axis 50 and axially offset from each other within the tool housing 12 of the power tool 10. Coaxially to the longitudinal central axis 50 in the region of the torque coupling 70, it is preferable to be able to rotate in the tool housing 12 by means of an actuating unit 102 arranged switching ring 100 is provided. This is preferably ring-shaped, ie, at least approximately hollow cylindrical, formed, but may alternatively also be formed eg kreissegment- or arcuate. The adjusting unit 102 preferably comprises an electric servomotor 104 and a rotationally driven actuating gear 106 with a pinion 108 or a small gear with a small number of teeth. The adjusting gear 106 preferably has a high reduction in order to increase the torque output by the servomotor 104 while at the same time lowering the rotational speed of the pinion 108.

The switching ring 100 preferably has on a side facing the handle 14 underside 1 10 via a radially outwardly directed teeth 1 14, which is preferably in constant engagement with the pinion 108 of the actuator 102. The lower-side toothing 14 of the switching ring 100 preferably extends in this case only in a circular arc section 15 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 actuator 102 and the servo motor 104 according to an embodiment in an angular range of up to 90 °, or ± 45 ° about the longitudinal center axis 50, motorized pivotable or rotatable. Alternatively, it is also e.g. a larger angular range with the appropriately adapted teeth 1 14 feasible. For example, the gearing 1 14 may completely comprise the switching ring 100, i. in the manner of a 360 ° toothing, thus allowing an unlimited angular range.

The switching ring 100 preferably has circumferentially on a first slide track 1 16, which is illustratively ramped and in which a shift rod 1 18 is guided. Preferably, to the shift rod 1 18, a switch bracket 120 is articulated from a bent wire, which is preferably coupled to a hidden here cogwheel of the transmission 90. Therefore, can be through the

Bestromen of the servomotor 104 with a certain direction of rotation cause a motor speed changeover of the shiftable transmission 90. Furthermore, at least one and here exemplarily three, circumferentially 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 formed cam 124 executed, which are directed axially in the direction of the tool holder 40 and serve to activate or deactivate the impact mode or the switching on or off of the not visible here impact mechanism 30 by means of a blocking element here hidden (200, in Fig. 4) ,

The switching ring 100 is, according to one embodiment, rotatable about the longitudinal central axis 50 at least into a first and a second switching position, wherein the first switching position or rotational angular position, for example, is rotatable. the non-impact mode of operation and the second switching position associated with the impact mode of the power tool 10. The switching position of the switching ring 100 shown here by way of example is the first switching position in which the percussion mechanism 30 is switched off or the beat mode is deactivated.

According to one embodiment, the switching ring 100 also cooperates with a position detection unit 130, which is designed, inter alia, to precisely detect the current switching position of the switching ring 100 and to visualize it for the user. In the switching ring 100, a second slide track 132 is preferably peripherally introduced for this purpose, the illustratively at least approximately rectilinear and transverse to a cross section of the switching ring 100 runs. In the slide track 132 of the switching ring 100 engages a lower side on a plate-shaped base body 133 of the position detection unit 130 formed, pin-like and only dashed lines indicated guide member 134 a. As a result, each change of the current rotation angle 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 e.g. in conjunction with an attached near the display element 136 in the tool housing 12, the better graphic overview not shown scale element, then at least a purely mechanical display for the user, whether the hand tool 10 in the non-impact mode or in the

Beat mode is located.

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

Furthermore, an electronic linear sensor 138 is preferably arranged in the region of a circuit board 139 of a complex electronic unit 140 assigned to the position detection unit 130 and designed to detect the respective current axial detection position of the position detection unit 130. This covers the

Linear sensor 138 preferably the linear movement of the pointer-like, oriented perpendicular to the longitudinal central axis 50 display element 136 of the position detection unit 130 and thus indirectly the respective switching or rotational position of the actuatable switching ring 100. By mechanically coupled to the second slide track 132 position detection unit 130 here is an exact mechanical Transformation of the rotational movement of the switching ring 100 is ensured in a proportional linear position of the display element 136.

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

The preferably non-contact electronic linear sensor 138 and / or the angle sensor 145 makes it possible to detect the switching position of the switching ring 100 electronically with high accuracy, e.g. by means of the electronics

140 to process further and thus complex, automatically running control and / or control processes using the actuator 102 to realize. The electronic unit 140 preferably controls the drive motor 22 and / or the illumination device 18 of FIG. 1 at the same time, the drive motor 22 preferably being actuated as a function of a direction of rotation signal transmitted by the reversing switch (24, not shown in FIG. 1) , loading Preferably, the handset 16 has a lock, which is preferably designed as a mechanical and / or electrical locking. Furthermore, the on / off switch 17 and / or the electronics 140 are powered by the battery pack (80, in FIG. 1).

Fig. 3 shows the switching ring 100 of the power tool 10 of FIG. 2, in the region of its in Fig. 2 the pinion 108 of the actuator 102 of FIG. 2 facing underside 1 10, the radially outwardly facing teeth 1 14 which preferably integrally with Switching ring 100 is formed and extends here only by way of example circumferentially over an angle α of about 60 °, so as to allow a pivoting of the switching ring by ± 30 ° starting from the position illustrated here. In the region of an end face 125 of the switching ring 100 facing the tool holder 40 of FIG. 2, the three deactivation elements 122 are designed as exemplarily cams 124, preferably integrally with the switching ring 100, and preferably uniformly offset from each other by 120 ° circumferentially. The cams 124 illustratively each have a preferably circular-sector-shaped base surface lying parallel to the end face 125. Preferably, at least approximately diametrically to the toothing 14 at a peripheral portion of a rear side 126 of the switching ring 100, a lug-like extension 127 is formed. Its curvature preferably corresponds to that of the switching ring 100 and its shape corresponds to an example approximately that of a rectangular section of a hollow cylinder. In the extension 127, the two, preferably this radially completely passing through and extending approximately transversely to the longitudinal center axis 50 slide tracks 1 16, 132 of FIG. 2 are introduced.

Illustratively, in the region of an exemplary approximately cylindrical inner surface 128 of the switching ring 100 three Einstellnocken 129 are further formed, which serve to set one of the optional torque clutch (72 of Fig. 2) maximum transferable torque or a Ansprechmoments the torque coupling. Of the total of three adjusting cam 129 only a single Einstellnocken is visible here. The adjustment cams 129 are axially connected to the cams 124 for activating and deactivating the impact mode, respectively, but are preferably positioned circumferentially offset therefrom and facing inwardly Direction of the back 126 of the switching ring 100. Furthermore, the adjusting cam 129 close in the radial direction flush with the cam 124.

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

The front planetary stage 160 has, by way of example, a sun gear 166, at least two planetary gears (not shown) for better clarity of the drawing, a planetary carrier 168, as well as a ring gear 170 axially immovable and rotationally fixed in the gearbox 94. The sun gear is for rotating drive of the planetary gear 92 166 of the front planetary stage 160 at least rotationally fixed, 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 gear 171 of the armature shaft 34. The middle planetary stage 162 has, for example, a sun gear 172 - which is integrally formed on the planet carrier 168 of the front planetary stage 160 - at least two non-designated planet gears, a planet carrier 174 and the peripheral axially displaceable Schalthohlrad 176. The rear planetary stage 164 has an example a central sun gear 178 - which is integrally formed on the planet carrier 174 of the upstream central planetary stage 162 -, two non-designated planetary gears and a planet carrier 180. In addition, in the region of the rear planetary stage 164, an axially fixed and non-rotatably received in the gear housing 94 ring gear 182 shown which is associated with a friction clutch not further described. The shift lever 120 of FIG. 2 preferably intervenes in the shift ring gear 176, so that a motor speed changeover, for example between at least one fast shift and one shift shift, can be achieved by the shift ring 100 (see in particular FIG. 2) that can be rotated by means of the set unit 102 of FIG slow gear stage of the shiftable transmission 90, by axial displacement of the switching ring gear 176 of the central planetary stage 162 can be effected. A preferably rotatably mounted in a first and a second bearing 52, 54 in the tool housing 12 of FIG. 2 output spindle 150 is rotatably driven by means of the switchable planetary gear 92 and this subsequent, optional torque coupling 72 of FIG. The two bearings 52, 54 are preferably constructed with radial ball bearings. The tool holder

40 of Fig. 2 with the two visible clamping jaws 48 is preferably rotatably disposed on a threaded portion 152 of the output spindle 150. The radially inwardly directed clamping of the clamping jaws 48 takes place with the aid of the clamping ring 46 of the quick-action 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 rotatably connected thereto.

The height of a maximum of the optional torque clutch 72 transmissible torque is adjustable by means of the adjustment ring 70 of FIG. 1 by the user. The detailed structural design of such a torque coupling is sufficiently familiar to the expert in the field of hand tool machines 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 exemplified here as a cross-sectionally approximately S-shaped bearing bracket 202 with a first and a second leg 204, 206 configured. The legs 204, 206 preferably extend 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 center section which is not designated and which extends parallel to the longitudinal central axis 50 for better clarity of the drawings.

In the illustrated here rotary position or angular position of the switching ring 100 is the hand tool 10 of FIG. 1 in the non-impact mode of operation. In this, the first leg 204 of the bearing bridge 202 is preferably axially on the cam 124 or on the deactivation element of the switching ring 100, while the second bearing 54 between the second leg 206 of the bearing bridge 202 and a shoulder 156 of the output spindle 150 axially on both sides is fixed. Thus, the blocking member 200 or the bearing bridge 202 is in its position shown in a bioburden ckierposition 208 and the impact mode is deactivated or the non-impact mode of operation of the power tool 10 is active.

If the switching ring 100 is rotated by means of the setting unit 102 of FIG. 2 or the actuator 104 of FIG. 2, then the bearing bridge 202, as with a

Arrow 210, axially displaced to a limiting 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 and a distance between the blocking position 208 and the drive motor side Limiting position 212 can spring in and rebound and thus the impact mode of the power tool 10 and preferably designed as a detent impact mechanism 32 impact mechanism 30 is activated. The detailed structure of such a percussion striking device 30, 32 is likewise well 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 shows a tooling system 1000 having the handheld power tool 10 of FIG. 1. The handheld power tool 10 is provided with the user guidance unit 60 of FIG. 1, which here preferably has an operating unit 500 for manually setting the non-striking operating mode and the striking mode. In the tool housing 12 of the power tool 10 are, inter alia, the electric drive motor 22 and the switchable gear 90 for the rotary drive of the tool holder 40th

Preferably, the operating unit 500 is equipped with at least one, but here illustratively three operating elements 502, 504, 506 for switching between the non-impact operating mode and the impact mode of the power tool 10. By way of example, the operating element 502 is provided for activating the screwing mode, the operating element 504 for setting a drilling mode and the operating element 506 for selecting the striking mode, the operating elements 502, 504, 506 having graphical symbols or pictograms corresponding to the operating modes. Preferably, the operating elements 502, 504, 506 are 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 a Lich dashboard indicated (LC) display 530 be equipped, the control signal described above, for example, is designed to display on the display 530 a display for visualization of a switching instruction or a request to initiate a switching operation for switching the drive unit 22 of the to generate non-beating mode of operation in the beat mode.

According to one embodiment, the user guidance unit 60 is, as described above, at least partially designed as an external, separate component 300. In this case, as shown here, the external component 300 preferably has a mobile computer 600 as a further user guidance unit, which is embodied in particular in the manner of a smartphone and / or tablet computer. Alternatively, other so-called "smart devices" such as a watch, glasses, etc., may be used as a mobile computer, and may, as stated above, rely on the provision of the operating unit

500 are omitted, especially if it can be realized by the mobile computer 600. In order to display a set operating mode, the handheld power tool 10 preferably additionally has the display 530, wherein the user guidance unit 60 forms 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 operating elements 602, 604, 606 for inputting at least one operating mode of the handheld power tool 10. As an example, in FIG. 5, the operating elements 602, 604, 606 are shown on the display 601 as control panels or icons or pictograms, but could also be designed as switches and / or keys.

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 on the display 601 a switching command or a request to initiate a switching process for switching between the non-beating operating mode and the beat mode to generate or display. Here, concrete (action ) Instructions on the display 601 displayed, for example, an instruction which operating mode is to be set for a given operation, which can then set a user of the power tool 10, for example via the control unit 500 on the power tool 10. In this case, the operating elements 502, 504, 506 on the handheld power tool 10 can be provided with light-emitting illumination means 510, 512, 514, the control signal in this constellation being designed to respectively switch on the corresponding illumination means 510, 512, 514. The illumination means 510, 512, 514 are preferably realized with spatially-compact illumination elements 520, 521, 522, such as, for example, colored or white LEDs.

In addition, the mobile computer 600 can also be at least partially integrated in the handheld power tool 10, wherein an adjustment of the respective operating mode in such a constellation then preferably each automatically, preferably via the electromotive actuator 102 and the servo motor 104 of FIG. 2, made becomes. It should also be noted that the exemplary implementations of the user guidance unit 60 described in FIG. 5 can be combined with one another in any desired way and the e.g. The communication interface 400 can also take over the functionality of the user guidance unit 60.

6 shows the operating unit 500 of FIG. 5 with the operating elements 502, 504, 506 and the setting 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 on. For displaying a respectively set operating mode, three illumination elements 520, 521, 522 are preferably provided (compare FIG. 5). In this case, in each case one of the electrical switching elements 535, 536, 537 is 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). Preferably, the three lighting elements 520, 521, 522 can be activated at least for the automatic display of the switching instruction for initiating a switching operation for switching over the impact mechanism (30, 32 in FIG. 2) between the non-impacting operating mode and the impact mode. Preferably, the electrical switching elements 535, 536, 537 are formed as switches or buttons and / or the lighting elements 520, 521, 522 are realized with colored or white LEDs. Alternatively, the operating unit 500 may also be designed in the manner of an (LC) display, preferably with touchscreen functionality, and / or in the manner of a mobile computer, with an icon to be actuated by the user on the display or icon respectively lighting up and / or or can blink.

The operating unit 500 preferably interacts with the adjusting unit 102 constructed from the servo motor 104 and the servo motor gear 106, which in turn can be connected to the rotatable or pivotable switching ring 100 (see FIG.

2 to 4) is mechanically connected, so that the user can set a mode of operation of the power tool 10 of FIG. 1 in a comfortable manner by means of a finger 1200. In this case, the current position of the switching ring 100 is respectively detected by the position detection unit (cf., in particular, FIG. 2), which moves axially in proportion to the current (rotational) angle of the switching ring 100 along a double arrow 1201.

The electrical board 508 of the operating unit 500 preferably has an elastic foil cover 540 in the manner of a foil keyboard, at least in the area of the lighting elements 520, 521, for protection against contamination.

522 is translucent and a smooth operation of the underlying switching elements 535, 566, 537 allows. The lighting elements 520, 521, 522 can also be placed directly below the operating elements 502, 504, 506 and the respectively associated symbols or pictograms for the screw mode, the drilling mode and the beat mode. In this way, an operating mode to be actively set by the user or an operating mode automatically selected by the handheld power tool to achieve optimum work results in a particular application scenario can be visualized by the illumination of the corresponding symbol. FIG. 7 shows the operating unit 500 of FIG. 5, which according to one embodiment has an adjusting element 700 for the manual selection of the respective operating mode. The tool housing 12 of FIG. 2 includes, among other things, the drive motor 22, the manual switch 16, switchable gears 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-type adjusting element 700 is preferably formed integrally with the actuatable switching ring 100 of FIGS. 2 to 4 and protrudes in relation to FIG

Longitudinal axis 50 radially out of a recess 702 in the control unit 500 out. By pivoting the adjusting 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. Analogously to FIGS. 5 and 6, the operating elements 502, 504, 506, which preferably have no switching functionality here, have the respective operating modes (screwing mode, drilling mode, beat mode) corresponding graphical symbols or pictograms. In the swivel position of the setting element 700 shown in FIG. 7, a non-striking operating mode of the handheld power tool 10 of FIG. 1, in particular the screwing mode, is selected by way of example.

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

The electronics 140 of FIG. 2 preferably controls at least one actuator 801, 802, 803. By way of example, three actuators 801, 802, 803 are provided in FIG. 8, wherein the actuator 801 is designed, for example, to change gears of the transmission 90, the actuator 802 to activate / deactivate the percussion mechanism 30 and the actuator 803 to set one of the optional ones Torque clutch 72 maximum transmissible torque M. Preferably, the electronics 140 when activating one of the three actuators 801, 802, 803 an activation signal to an associated illumination means 510, 512, 514 or at least one of the illumination elements 520, 521, 522 (see. Fig. 5 and Fig. 6) on. alternative or in addition, the activation signal can also be formed as a signal tone or haptic 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 communicating with the communication interface 400 of the handheld power tool 10. In this case, the first program 806 is preferably designed for setting special applications, e.g. to screw a screw into a soft or hardwood. In this case, the program 806 preferably determines, for the respective application, the operating parameters which are most suitable for achieving optimal work results, e.g. a speed, a direction of rotation, a torque, a gear and / or a Schlagbetriebersfordernis, and passes them to the communication interface 400 of the power tool 10 on.

In this case, the communication interface 400 is preferably designed to transmit a control signal to the actuators 801, 802, 803 of the handheld power tool 10, wherein at least one actuator 801 is configured to switch the switchable transmission 90 between at least two speed stages when activated by the communication interface 400 , Further, for example, the actuator 802 is configured to switch between the non-impact mode of operation and the percussion mode of the percussion mechanism 30 of the power tool 10 upon activation by the communication interface 400. Correspondingly, for example, the third actuator 803 serves to change the maximum torque M which 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 activates the respective associated actuators 801, 802, 803. Alternatively or additionally, the second program 808 is provided, which is designed to set at least one specific operating parameter, for example a rotational speed, a direction of rotation, a torque, a gear stage and / or a striking operation requirement. In this constellation, a user of the power tool 10 directly dictates the desired operating parameters via the program 808. These are then transmitted to the communication interface 400 of the handheld power tool 10, wherein the communication Communication interface 400 as described above, a corresponding control signal forwards.

Alternatively or additionally, the hand tool 10 for manually setting a gear and / or an operating mode or manual

Setting of operating parameters at least one signal generator 814, 815, 816 or at least one of the controls 502, 504, 506 (see, in particular, Fig. 5 and Fig. 6). It can be provided that at least one signal generator 814, 815, 816 sends an actuating signal to the communication interface 400 and / or the electronics 140. By way of example, in FIG. 8, three signal transmitters 814, 815, 816 are shown. In this case, the signal generator 814 is designed as an example for gear change, the signal generator 815 serves to activate and / or deactivate the percussion mechanism 30, and the signal generator 816 has the function of the torque adjustment of the optional torque coupling 72.

The respective signal generator 814, 815, 816 is preferably designed to send a control signal to the electronics 140 in an application-specific or input-dependent manner, so that the electronics 140 can correspondingly activate and / or control the respective actuators 801, 802, 803. In this case, the signal generators 814, 815, 816 are preferably designed as electrical signal transmitters, in particular as switches or as pushbuttons, but may also be designed as any other signal generator, e.g. be designed as a mechanically movable lever arm or the like. In addition, the user control unit 60 comprising the operating unit 62 (cf., in particular, FIGS. 1, 5 and 6) may be assigned a display and / or the mobile computer 600 which, as described above, has switching commands or prompts for the user indicating application specific switching between the non-impact mode of operation and the impact mode of the hand machine tool 10. The switching instructions on the

Display and / or the mobile computer 600 with symbolic and / or text-based step-by-step instructions, with pictograms or the like be visualized. In this case, the at least one operating element 64, 66 (cf., in particular, FIG. 1) for initiating a switching process for switching between the non-impacting operating mode and the impact mode preferably has a sensor 820, which is designed for communication interface 400 and / or the mobile computer 600 (see Fig. 6 in particular) upon actuation of the at least one control element 64, 66 by the user to transmit an actuation signal as a feedback or as feedback to the electronics 140, so that each one next Step of the switching 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. In this case, a further program or a software or smartphone app can be stored, which is adapted to check the settings of the electronics 140 and the hand tool 10 and adjust if necessary. For example, in the case of thermal overheating of the drive motor 22, a warning signal may be output and / or the beat mode may be deactivated. Furthermore, in the case of a thermal overload of the drive motor 22 due to a high torque applied to the tool holder an automatic gear shift can be triggered. Furthermore, an adapter interface 826 for connection to at least one

Adapter 830 may be provided. In this case, the adapter interface 826 may be designed in the manner of a mechanical interface, an electrical interface and / or an electronic data interface, wherein the adapter 830 may be used for the transmission of information and / or control signals, such as e.g. a torque, a speed, an electrical voltage, an electrical

Current and / or other data to the power tool 10 is formed. The adapter 830 preferably has a transmission unit (not illustrated) in the case of an adapter interface 826 designed as a data interface. Preferably, the adapter 830 may be e.g. be formed as a rangefinder and transmit measured values or parameters via the adapter interface 826 to the electronics 140 of the power tool 10. In this case, the adapter 830 can be used with and / or without drive unit 22. Preferably, the adapter 830 can be activated via the mobile computer 600, wherein this or the display can visualize an activation of the adapter 830.

Furthermore, the electronics 140 preferably control the drive motor 22 and / or the illumination device 18 of the handheld power tool 10, wherein the drive motor 22 is preferably controlled in response to a transmitted from the direction of rotation switch 24 direction of rotation signal. Preferably, the manual switch 16 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 powered by the battery pack 80 with power.

9 shows the handheld power tool 10 of FIG. 1 with the tool housing 12 and the handle 14 integrally formed thereon on the underside, and the optional communication interface 400, the manual switch 16, the reversing switch 24 and the tool holder 40. The handheld power tool 10 has an example here via an operating unit 900, which has a toggle-type rotary switch 902, at least for switching over between the non-striking operating mode and the striking mode, differing from all the embodiments described above.

The rotary switch 902 is preferably assigned an illumination means 904, 906, 908 or a lighting element, respectively, for the non-striking operating mode as well as the impact mode. For example, the illumination means 904, 906 are preferably two non-striking modes of operation, e.g. a screwing mode and a drilling mode, while the lighting means 908 is e.g. assigned to the beat mode. The circularly positioned illumination means 904, 906, 908 are preferably realized 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 perform a maximum rotation angle of, for example, 180 °. The illumination means 904, 906, 908 can ggfls. serve to illuminate at least partially translucent graphical symbols for the screw mode, drilling mode and the impact mode directly to further optimize the ease of use of the power tool 10. As already explained in the context of the description of FIG. 8, for example by means of the electronics 140 and / or the communication interface 400, that lighting means 904, 906, 908 are activated, which indicates the mode of operation deviating from the current operating mode and therefore to be set operating mode, in which the user, the hand tool 10 to achieve optimum working results in a specific application by turning the rotary switch 902 in one of to switch both directions of the double arrow 910. In addition, in the at least partially transparent designed direction of rotation switch 24, a further illumination means 912 be integrated to the user, for example, the requirement of reversing the direction of the tool holder 40 and thus the insert tool to signal. This may be the case, for example, when the electronics 140 detects a rapid increase in torque, indicating, for example, a drill stuck in the workpiece, which is preferably recoverable by an at least short-term change in the direction of rotation of the tool holder 40.

Thus, the four lighting means 904, 906, 908, 912 of the power tool 10 are used to initiate a complex use action on the part of the user in the context of passive user guidance, at the same time the type of operation required and / or the operating element itself, here exemplary turning the Rotary switch 902 or in relation to

Longitudinal axis 50 transverse axial displacement of the direction of rotation switch 24, the user is taught in a simple, intuitively perceptible manner. FIG. 10 shows the mobile computer 600 of the tool system 1000 of FIG. 5.

On the display 601 of the mobile computer 600 is exemplarily a first and a second switching instruction 608, 610 or a request to initiate an intervention on the part of the user 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 should, for example, cause the user to deactivate the beat mode or into the at least one non-beating operating mode of the handheld power tool 10, for example by actuating one of the two operating elements 64, 66

Control unit 62 to change. For this purpose, a graphic clarification is 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 actuated in the specific application case on the handheld power tool 10.

The second switching instruction 610 or request is issued to the user to request this e.g. to cause a particular, for the currently pending application process respectively optimally suited insert tool 42, such as a wood drill, a metal drill or a stone drill or the like, in the tool holder 40 of the power tool 10 of FIG. 1 insert and tighten. In order to make this possible, the user can be queried by means of another interactive program or program module running on the mobile computer 600 with regard to the details of the application case or work task to be processed by it, so that subsequently a suitable switchover instruction 610 or request to he can, for example, specify the type of insert tool to be inserted into the tool holder.

Claims

claims

1 . A hand tool (10) having a drive unit (20) for driving an insert tool (42) in at least one non-impact mode of operation, the drive unit (20) having a percussion mechanism (30) for strikingly driving the insert tool (42) in an associated impact mode, and wherein the drive unit (20) is associated with an actuatable switching ring (100) for switching the drive unit (20) between the at least one non-impact mode of operation and the associated impact mode, characterized in that a servomotor (104) is provided which is adapted thereto is, upon activation, the actuatable switching ring (100) for switching the drive unit (20) between the at least one non-impacting operating mode and the associated impact mode to operate.

2. Hand tool according to Claim 1, characterized in that the operable switching ring is associated with a position detection unit (130) which is adapted to detect a respective current switching position of the operable switching ring (100).

3. Hand tool according to Claim 2, characterized in that the operable switching ring (100) is rotatable at least between a first and a second switching position, wherein the first switching position is assigned to the at least one non-impact mode and the second switching position associated with the impact 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 for detecting the first switching position and the second detection position for detecting the second switching position is formed.

4. Hand tool according to Claim 2 or 3, characterized in that the operable switching ring (100) one with the position detection unit (130) connected to the slide track (132), which is designed for the axial displacement of the position detection unit (130) upon actuation of the operable switching ring (100).

Powered hand 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) at least partially engages in the slide track (132) and the display element (136) formed thereto is to display a respectively detected switching position of the operable switching ring (100).

Powered hand tool according to one of claims 2 to 5, characterized in that the position detection unit (130) is associated with a linear sensor (138) which is adapted to detect a respective current detection position of the position detection unit (130).

Powered hand tool according to one of claims 2 to 5, characterized in that the position detection unit (130) for detecting a respective current switching position of the operable switching ring (100) is associated with an angle sensor (145).

Powered hand tool according to one of the preceding claims, characterized in that the operable switching ring (100) deactivation elements (122) for deactivating the percussion mechanism (30) in the at least one non-impacting operating mode.

Hand tool according to one of the preceding claims, characterized in that a blocking member (200) is provided, which is blockable in at least one predetermined blocking position (208), wherein a blocking of the blocking member (200) in the at least one predetermined blocking position (208) of a deactivation corresponds to the assigned beat mode.

0. Hand tool according to claim 8 and 9, characterized in that the deactivating elements (122) are adapted to the blocking member (200) in the at least one non-impacting operating mode in to bias the at least one predetermined blocking position (208) to allow blocking of the blocking member (200) in the at least one predetermined blocking position (208) to deactivate the associated beat mode in the at least one non-striking mode of operation.

1 1. Hand tool according to claim 9 or 10, characterized in that the blocking member (200) in the associated impact mode between the predetermined blocking position (208) and at least one limiting position (212) is movable, so that a release of the blocked in the predetermined blocking position (208) blocking member ( 200) corresponds to activation of the associated beat mode.

12. Hand tool according to one of the preceding claims,

characterized in that the striking mechanism (30) is designed in the manner of a catch impact mechanism (32).

13. Hand tool according to one of the preceding claims,

characterized in that an operating unit (62) is provided for switching between the at least one non-impacting operating mode and the associated impact mode.

14. Hand tool according to one of the preceding claims,

characterized in that the operating unit (62) comprises a switch, a button and / or a touch-sensitive screen for switching between the at least one non-impact mode of operation and the associated beat mode.

15. Hand tool according to Claim 13 or 14, characterized in that the operating unit (62) for displaying a respectively set operating mode has at least one display element.