EP3389943A1

EP3389943A1 - Hand-held power tool comprising a percussion mechanism

Info

Publication number: EP3389943A1
Application number: EP16809003.3A
Authority: EP
Inventors: Florian Bantle; Thomas Duerr; Juergen Gairing
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2015-12-18
Filing date: 2016-12-07
Publication date: 2018-10-24
Anticipated expiration: 2036-12-07
Also published as: US11679484B2; CN108367422A; DE102015226090A1; EP3389943B1; CN108367422B; US20180361559A1; WO2017102514A1

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, a communication interface (400) is provided for communication with a guide unit (60) operable by a user and is designed to receive from the guide unit (60) switching instructions for switching the drive unit (20) according to the specific use 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 hand tool with a drive unit for driving an insert tool in at least one non-impact mode of operation, wherein the drive unit has a percussion mechanism for the striking drive of the insert tool in an associated impact mode.

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 invention relates to a new hand tool machine with a drive unit for driving an insert tool in at least one non-impact mode of operation, wherein the drive unit has a percussion mechanism for striking the insert tool in an associated impact mode. A communication interface is provided, which is provided for communication with a user-operable user guidance unit and which is adapted to receive from the user guidance unit switching instructions for application-specific switching of the drive unit between the at least one non-impacting operating mode and the associated impact mode.

The invention thus makes it possible to reduce the likelihood of operator errors on the part of the user. For example, the percussion can be varied depending on a particular application scenario, such as Drilling in concrete, stone or wood, without activating the user either enable or disable. In addition, an increase in the general operating convenience can be realized.

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

As a result, for example, a comfortable, complete control of the power tool from a distance is possible.

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

As a result, extensive control operations of the power tool using the user guidance unit can be realized.

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

As a result, complex operating processes of the power tool can also be program-controlled or automatic, ie without user intervention. Preferably, the user guidance unit has at least one operating element for initiating a switching operation for switching over the drive unit between the at least one non-impact operating mode and the associated impact mode, wherein the communication interface is adapted to send a control signal to the at least one control element to generate a Switching instruction or a request to initiate a switching operation for switching the drive unit between the at least one non-impacting operating mode and the associated impact mode by the at least one control element to enable.

As a result, a device-side switching instruction or a request to the user may be made to cause it to switch between the at least one non-beating operating mode and the beat mode.

Preferably, the at least one control element is provided with a lighting means and the control signal is adapted to activate the lighting means for visualizing the switching instruction for initiating a switching operation for switching the drive unit between the at least one non-impacting operation mode and the associated impact mode.

With the aid of the at least one illumination means, a haunting, active user guidance can be realized to facilitate the operability of the handheld power tool.

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

As a result, various haptic actuation possibilities for the user can be realized.

Preferably, the at least one operating element has a display and the control signal is designed to display on the display a display for visualizing the switching instruction for initiating a switching process for conversion. switching the drive unit between the at least one non-impact mode of operation and the associated beat mode.

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

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

This results in a further increased functionality of the display, since this also allows user input in addition to its display functionality. It also provides a more intuitive user experience, as the icons or icons displayed on the display can be selected directly by touching with a finger, and the logical process associated with them can be triggered by the (control) electronics.

Preferably, the at least one operating element for initiating a switching operation for switching the drive unit between the at least one non-impacting operating mode and the associated impact mode can be actuated and has a sensor which is adapted to the communication interface upon actuation of the at least one control element to an actuation signal to transfer.

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

According to one embodiment, a servomotor is provided, which is designed to switch the drive unit between the at least one non-striking operating mode and the associated beat mode upon activation.

In this way, if necessary, a motor-independent switching between the non-beating operating mode and the beating mode is also possible, independent of the active action of the user. In addition, constant, minimal actuation forces can always be achieved by the servomotor for the user. range, which are independent of a respective mechanical switching state of the transmission, the torque coupling and / or the striking mechanism of the power tool.

Preferably, the servomotor can be activated by an actuation of the at least one operating element.

As a result, direct activation of the servomotor, regardless of the mobile computer or complex (control) electronics, is possible only through active user intervention.

Preferably, the communication interface is adapted to transmit a control signal to the servomotor for activating the servomotor.

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

The communication interface is preferably designed to transmit a control signal to actuators of the handheld power tool, wherein at least one actuator is designed to switch the drive unit between the at least one non-impact operating mode and the assigned beat mode upon activation by the communication interface.

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

Preferably, the communication interface is designed in the manner of a wireless transmission module, in particular as a wireless module for wireless communication by means of Bluetooth standard.

As a result, the remote control of the handheld power tool or of a tool system with this and the mobile computer is used. standardized, fail-safe and highly compatible radio standards.

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,

3 is a perspective view of a switching ring of the power tool of FIG. 2,

4 is a plan view of an enlarged longitudinal section of the portable power tool of FIG. 1 according to the section line IV-IV of FIG. 1, 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,

FIG. 8 is a block diagram of the tooling system of FIG. 5 with the portable 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

FIG. 10 is an enlarged view of the mobile computer of the tooling system of FIG. 5. FIG.

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 noted, however, that the present invention is not limited to cordless impact drills, but rather to various hand-held power tools in which impactor 30 may be used, such as e.g. an impact wrench or a percussion drill, can be used. This is also independent of whether the power tool 10 is non-electrically or electrically operable, i. depending on the mains or mains-independent or battery-powered.

A drive unit 20 for driving an insert tool 42 in at least one non-impact operating mode is preferably arranged at least in sections in the tool housing 12. By way of example, the drive unit 20 has an electric drive motor 22, which is not shown here, preferably a shiftable transmission (90 in FIG. 2), here merely indicated

Impact mechanism 30 for the striking drive of the exemplary recorded in a tool holder 40 insert tool 42 in a striking mode of the power tool 10 and an optional torque coupling (72 in Fig. 2) on. 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. Impact mechanism 30 is preferably constructed as a so-called detent impact mechanism 32. The optional torque clutch (72 in FIG. 2) is preferably adjustable in steps by means of a preferably annular latching ring 70 which rotates about the longitudinal center axis 50, so that a maximum available torque at the tool holder 40 is limited to a maximum value. is borderline. 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

Act screwdriver bit.

The tool housing 12 further has an ergonomically shaped handle 14 with a manual switch 16 for switching on / off and preferably continuously variable speed control of the electric drive motor 22. Furthermore, on the handle 14 an optional, preferably in the direction of the tool holder 40 radiating, on 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 preferably received transversely displaceable for actuation to the longitudinal central axis 50 in the tool housing 12.

The switchable transmission (90 in FIG. 2) of the handheld power tool 10 is switchable at least between a first and second gear stage. Preferably, the first, preferably slow gear is the non-beating operating mode, such as a screw mode assigned, and the second, preferably faster gear a Bohrmodus and / or the beat mode. However, other gear ratios can be realized, such that, for example, the second-speed drilling mode and the percussion mode are associated with a third-speed stage, etc. According to one embodiment, at least one user guidance unit 60 is provided, at least for switching between the non-impact mode of operation and the impact mode serves. 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 preferred by visual, auditory, and / or haptic instructions, cues, to switch between the non-beating Operating mode and the beat mode instructed, while in a passive 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 to the user feedback on whether the hand tool 10 is in non-impact mode or in impact mode, a vibrating element, such as an electric motor with an eccentric or the like may 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 control elements 64, 66 for initiating a switching operation for switching between the non-impacting operating mode and the impact mode are formed. The two controls 64, 66 may be e.g. as electrical switches, pushbuttons, detent switches, buttons, pushbuttons, gesture control and / or with a touch-sensitive display, e.g. a touch-sensitive screen or a touch screen, be realized, which are not shown the better graphical overview here. Furthermore, the two operating elements 64, 66 optical display elements or lighting elements (see, in particular, 520, 521, 522 in Fig. 6) for displaying the respectively set operating mode of the power tool 10 may be assigned, wherein the display elements preferably constructed with colored or white LEDs are. Preferably, the user guidance unit 60 further comprises a mobile computer, e.g. a smartphone and / or a tablet computer and / or the operating elements 64, 66 are themselves configured as 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. Switching instructions may be preferred on the display. be shown to facilitate a user of the power tool 10 to achieve optimal results, the operation and / or adjustment, for example, an application-specific operating mode of the power tool 10.

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 is preferably interactively 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 parts 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, provision may be made for the operating elements 64, 66 to conversely transmit an actuation signal to the communication interface 400 or to (control) electronics not shown here, for the notification that the user has actually carried out the corresponding application-specific switching. It is preferred to generate a switching instruction for initiating a switching operation between the beat mode and the non-beat mode of operation, e.g. by at least one of the two control elements 64, 66 allows.

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 Wi-Fi, WiFi and / or

LAN, be trained.

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 jaws 48 are radially movable by means of the rotatable around the longitudinal center axis 50 clamping ring 46 of the quick-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, it is possible to set the maximum torque that can be transmitted by an optional torque coupling 72 and can be called off from the tool holder 40. 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.

Preferably, coaxially to the longitudinal center axis 50 in the region of the torque coupling 70, a switching ring 100 arranged rotatably in the tool housing 12 by means of an actuating unit 102 is provided. This is preferably annular, i. at least approximately hollow cylindrical, formed, but may alternatively also e.g. be formed 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 underside toothing 1 14 of the switching ring 100 extends here preferably only in a circular arc portion 1 15 of the switching ring 100 with an opening angle of preferably up to 90 °. The switching ring 100 is thus in an angular range of up to 90 °, or ± 45 ° about the longitudinal center axis 50, with the aid of the setting unit 102 or the servo motor 104, according to one embodiment. motorized pivotable or rotatable. Alternatively, for example, a larger angle range with the correspondingly adapted teeth 1 14 can be realized. For example, the teeth 1 14 completely comprise the switching ring 100, ie in the manner of a 360 ° toothing, and thus allow 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, a switch bracket 120 is hinged to the shift rod 1 18 from a bent wire, which preferably with a hidden here

Shift ring gear of the transmission 90 is coupled. Therefore, by energizing the servomotor 104 with a certain direction of rotation, a motor-speed changeover of the shiftable transmission 90 can be effected. 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 deactivating elements 122 are exemplarily embodied as cams 124 which are formed integrally with the switching ring 100 and are directed axially in the direction of the tool holder 40 and which activate or deactivate the striking mode or switch on or off the percussion mechanism 30 which is not visible here by means of a blocking element concealed here (200, in Fig. 4) serve.

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 provided peripherally for this purpose, which illustratively at least approximately rectilinearly and transversely 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, for example, in conjunction with a mounted in the vicinity of 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-illustrated beating operating 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 located in a first axial detection position, while the position detection unit 130 is in a second axial detection position in the position indicated by a dashed line. 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 respectively 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, perpendicular to the longitudinal central axis 50 oriented 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 is in this case ensures an exact mechanical transformation of the rotational movement of the switching ring 100 in a proportional linear position of the display element 136. Preferably, at least one sensor element is associated with 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 may be used to detect a respective rotational angular position of the switching ring 100, which is a direct sampling of the respective

Switching or rotational position of the switching ring 100 allows, whereby a play-free detection of the switching or the rotational position of the switching ring 100 is made possible with a higher accuracy. 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. be further processed by means of the electronics 140 and thus to realize complex, automatically running control and / or control processes using the actuator 102. The electronics 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 direction-of-rotation switch (not shown) (FIG. 1). 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 only by way of example peripherally over an angle α of about 60 °, so as to allow a pivoting of the switching ring by ± 30 ° starting from the here illus- trated position. In the area of a tool holder 40 of

2 facing end side 125 of the switching ring 100, the three exemplary designed as a cam 124 deactivation elements 122 are formed, preferably integrally with the switching ring 100, and preferably arranged circumferentially uniformly offset by 120 ° to each other. 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 adjusting cams 129 are also provided, which serve to set a maximum torque that can be transmitted by the optional torque coupling (72 of FIG. 2) or a torque of the torque coupling. Of the total of three adjusting cam 129 only a single Einstellnocken is visible here. The adjusting cams 129 connect axially to the cams 124 for activating or deactivating the impact mode, but are preferably positioned circumferentially offset therefrom and toward the rear 126 of the switching ring 100. Further, the adjusting cams 129 close flush in the radial direction the cam 124 on.

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 embodied here as a planetary gear 92 with three planetary stages arranged in the gearbox 94: a front planetary gear stage 160, a middle planetary stage 162 and a rear planetary stage 164 closest to the tool holder 40 of FIG Front planetary stage 160 has, for example, a sun gear 166, at least two of the better diagrammed overview not designated planetary gears, a planet carrier 168, as well as an axially immovable and rotationally fixed in the gear housing 94 arranged ring gear 170. For rotating drive of the planetary gear 92, the sun gear 166 of the front Planet 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 as a Abtriebsrit- zel 171 of the armature shaft 34 executed. By way of example, the middle planetary stage 162 has a sun gear 172-which is integrally formed on the planet carrier 168 of the front planetary stage 160-at least two planetary gears not designated, a planet carrier 174 and the peripheral axially displaceable switching 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 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 immovable and rotationally fixed in the gear housing 94 recorded ring gear 182 shown that a not further described slip clutch is assigned. 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 clamping jaws 48 visible here is preferably arranged rotatably 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 planetary carrier 180 of the rear planetary stage 164 and is connected with it in a torque-proof manner.

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 the person working in the field of hand tool machines From the prior art sufficiently familiar, so that can be dispensed with a more detailed description 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 preferably lies 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 150th axially fixed on both sides. Thus, the blocking member 200 or the bearing bridge 202 is in its illustrated position in a blocking position 208 and the beat mode is deactivated or the non-beat

Operating mode 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 servomotor 104 of FIG. 2, then the bearing bridge 202, as indicated by an arrow 210, move axially into a limiting position 212, so that the second bearing 54th 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 the preferably as

Rastenschlagwerk 32 trained Schlagwerk 30 is activated. The detailed structure of such a percussion striking device 30, 32 is also well known to the skilled person from the prior art, so that it can be dispensed with a more detailed description of the same at this point. FIG. 5 shows a tool system 1000 having the hand tool 10 of FIG. 1. The handheld power tool 10 is provided with the user guidance unit 60 of FIG. 1, which preferably has an operating unit 500 for manually setting the non-impacting operating mode and the impact 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 hand tool 100. Furthermore, the operating unit 500 can be equipped with an (LC) display 530, indicated only by dashed lines, wherein the control signal described above is used, for example. is adapted to generate on the display 530 a display for visualizing a switching instruction or a request for initiating a switching operation for switching the drive unit 22 from the non-impacting operation mode to the impact 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, the external component 300, as shown here, 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 also be used as a mobile computer. <br/><br/> Under certain circumstances, as stated above, the provision of the operating unit 500 may be dispensed with, in particular in the case of the latter mobile computer 600. To indicate a set operating mode, the Hand tool 10 preferably additionally on the display 530, wherein the user guide unit 60 together with the power tool 100, the tool system 1000 is formed. Preferably, the mobile computer 600 has at least one electronic display

601, which is preferably designed in the manner of a touch-sensitive screen or a touch screen. 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 are preferably displayed via the display 601, e.g. an instruction as to which operating mode is to be set for a given operation, which a user of the handheld power tool 10 then subsequently, e.g. can adjust on the hand tool 10 via the operating unit 500. 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 colored or white LEDs.

In addition, the mobile computer 600 may 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, is made. It should also be noted that the in 5, exemplary implementations of the user guidance unit 60 are arbitrarily combinable with one another and that, for example, the communication interface 400 can also take over the functionality of the user guidance unit 60.

FIG. 6 shows the operating unit 500 of FIG. 5 with the operating elements 502, 504, 506 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. For displaying a respectively set operating mode, preferably three lighting elements 520, 521, 522 are 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 process for switching over the impact mechanism (30, 32 in FIG. 2) between the non-impact 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 servomotor 104 and the servomotor gear 106, which in turn is mechanically connected to the rotatable or pivotable switching ring 100 (see FIGS. 2 to 4), so that the user uses a finger 1200 can set a mode of operation of the power tool 10 of FIG. 1 in a comfortable manner. The current position of the switching ring 100 is in each case detected by the position detection unit (cf., in particular, FIG. 2), which moves proportionally 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 film cover 540 in the manner of a membrane keyboard, which is transparent at least in the area of the lighting elements 520, 521, 522 and enables a smooth operation of the underlying switching elements 535, 566, 537 , The lighting elements 520, 521, 522 can also be placed directly below the controls 502, 504, 506 and their respective associated symbols or icons for the screwing 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 optimal 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, the shiftable transmission 90, the rotatable shift 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 projects radially out of a recess 702 in the operating unit 500 in relation to the longitudinal central axis 50. 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. 7, the pivoting position of the adjusting element 700 shown in FIG. a non-impact mode of operation of the power tool 10 of FIG. 1, in particular the screw mode selected.

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 on. By way of example, three actuators 801, 802, 803 are provided in FIG. 8, wherein the actuator 801 is designed as an example for the gear change of the transmission 90, the actuator 802 for activating / deactivating the striking mechanism 30 and the actuator 803 for setting one of the optional torque coupling 72 maximum transmissible torque M. Preferably, the electronics 140 assists

Activation of 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, in particular, Fig. 5 and Fig. 6) on. Alternatively or additionally, 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 communication 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. Here, program 806 preferably determines, for the particular application, the most suitable operating parameters for achieving optimal work results, e.g. a rotational speed, a rotational direction, a torque, a gear ratio 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 designed to operate in the event of an activation. 4 through the communication interface 400 to switch the switchable transmission 90 between at least two gear ratios. 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 is used 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 the respective associated actuators 801, 802, 803. controls.

Alternatively or additionally, the second program 808 is provided, which is used to set at least one specific operating parameter, e.g. a rotational speed, a direction of rotation, a torque, a gear ratio and / or a striking operation requirement is formed. In this constellation, a user of the handheld power tool 10 presets the desired operating parameters directly through the program 808. These are then transmitted to the communication interface 400 of the handheld power tool 10, wherein the communication interface 400, as described above, forwards a corresponding control signal.

Alternatively or additionally, the manual power tool 10 for manual adjustment of a gear stage and / or an operating mode or for manual adjustment of operating parameters at least one signal generator 814, 815, 816 or at least one of the controls 502, 504, 506 (see. 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 changing gear, the signal generator 815 serves to activate and / or

Deactivation of percussion mechanism 30 and signalers 816 has the function of torque adjustment of optional torque clutch 72.

The respective signal transmitter 814, 815, 816 is preferably designed for application-specific or input-dependent control signal to the electronics

140, so that the electronics 140, the respective actuators 801, 802, 803 activate and / or control accordingly. Preferably, the signal transmitters 814, 815, 816 are designed as electrical signal transmitters, in particular as switches or as pushbuttons, but may also be designed as any other signal transmitter, for example as a mechanically displaceable 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 instructions or Displays prompts for application specific switching between the non-impact mode of operation and the impact mode of the hand tool 10. In this case, 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. In this case, the at least one operating element 64, 66 (see in particular.

1) for initiating a switching operation for switching between the non-beating operating mode and the beating mode preferably includes a sensor 820 adapted to communicate with the communication interface 400 and / or the mobile computer 600 (see, in particular, FIG an actuation of the at least one operating element 64, 66 by the user to transmit an actuation signal as a feedback or as a feedback to the electronics 140 so that a respective 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 may be configured as a temperature sensor, acceleration sensor, magnetic field sensor, 3D position sensor, etc. In this case, another program or a software or smartphone app can be deposited, which is adapted to the settings of

To check electronics 140 and the power 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 may be provided for connection to at least one adapter 830. 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 for transmitting information and / or control signals, such as a torque, a rotational speed, an electrical voltage, an electric 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. For example, the adapter 830 can preferably be designed as a rangefinder and transmit measured values or parameters via the adapter interface 826 to the electronics 140 of the handheld 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 direction of rotation switch 24 transmitted 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 a lighting means 904, 906, 908 or for the non-impact mode of operation and the impact mode respectively Associated lighting element. For example, the illumination means 904, 906 are preferably assigned two non-impact modes of operation, eg, a screw mode and a drilling mode, while the illumination means 908 is associated, for example, with 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 may have a maximum rotation angle of e.g. 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 description of Fig. 8, e.g. by means of the electronics 140 and / or the communication interface 400 those lighting means 904, 906, 908 are activated, which indicates the current operating mode deviating, machine side currently preset and therefore to be set operating mode, in which the user, the power tool 10 to achieve the best possible work results in one concrete application to switch by turning the rotary switch 902 in one of the two directions of the double arrow 910. In addition, in the at least partially transparent designed direction of rotation switch 24, a further lighting means 912 may be integrated to signal the user, for example, the need for a reversal of the tool holder 40 and thus the insert tool. 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 Art the necessary operation and / or the operating element itself to be actuated, here exemplarily the rotation of the rotary switch 902 or the transverse axis relative to the longitudinal central axis 50 shifting 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, a first and a second switchover instruction 608, 610 or a request to initiate an intervention on the part of the user are shown here by way of example 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 to change to 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 of the operating unit 62. For this purpose, a graphic clarification is provided 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 actuated in the specific application on the handheld power tool 10.

The second switch 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, characterized by a communication interface (400) provided for communicating with a user operable user guidance unit (60) and adapted to receive, from the user guidance unit (60), switching instructions (608, 610) for application specific switching of the drive unit (20) between the to receive at least one non-impact mode of operation and the associated beat mode.

2. Hand tool according to Claim 1, characterized in that the user guide unit (60) is at least partially integrated into the hand tool (10) and / or at least partially as an external, separa te component (300) is formed.

3. Hand tool according to claim 1 or 2, characterized in that the user guide unit (60) comprises a mobile computer (600), in particular a designed like a smartphone or tablet computer mobile computer (600).

4. Hand tool according to one of the preceding claims, characterized in that the user guide unit (60) for communication with the communication interface (400) has an interactive program (806, 808), in particular a smartphone app.

5. Hand tool according to one of the preceding claims, characterized in that the user guide unit (60) at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) for initiating a Nes switching operation for switching the drive unit (20) between the at least one non-impact mode and the associated impact mode, wherein the communication interface (400) is adapted to a control signal to the at least one control element (64, 66, 502, 504, 506 , 602, 604, 606) for generating a switching instruction (608, 610) for initiating a switching operation for switching the drive unit (20) between the at least one non-impact operating mode and the associated impact mode by the at least one control element (64, 66 , 502, 504, 506, 602, 604, 606).

Powered hand tool according to claim 5, characterized in that the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) with a lighting means (510, 512, 514) is provided and the control signal is adapted to the Illuminating means (510, 512, 514) for visualizing the switching instruction (608, 610) for initiating a switching operation for switching the drive unit (20) between the at least one non-impact mode of operation and the associated beat mode.

Powered hand tool according to claim 5 or 6, characterized in that the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) is designed as a switch or key.

Powered hand tool according to one of claims 5 to 7, characterized in that the at least one operating element (64, 66, 502, 504, 506) has a display (530) and the control signal is adapted to display on the display for visualization of the switching instruction (608, 610) for initiating a switching operation for switching the drive unit (20) between the at least one non-impact mode of operation and the associated beat mode.

Powered hand tool according to claim 8, characterized in that the display (530) is designed in the manner of a touch screen.

10. Hand tool according to one of claims 5 to 9, characterized in that the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) for initiating a switching operation for switching the drive unit (20) between the at least a non-impact operating mode and the associated impact mode is actuated and a sensor (820) which is adapted to the communication interface (400) upon actuation of the at least one operating element (64, 66, 502, 504, 506, 602, 604 , 606) to transmit an actuation signal (817).

Powered hand tool according to one of the preceding claims, characterized in that a servomotor (104) is provided, which is adapted to switch on activation, the drive unit (20) between the at least one non-impacting operating mode and the associated impact mode.

Powered hand tool according to one of claims 5 to 10 and 1 1, characterized in that the servomotor (104) by actuation of the at least one operating element (64, 66, 502, 504, 506, 602, 604, 606) can be activated.

Powered hand tool according to claim 1 1, characterized in that the communication interface (400) is adapted to transmit a control signal to the servo motor (104) for activating the servomotor (104).

Hand tool according to one of the preceding claims, characterized in that the communication interface (400) is adapted to transmit a control signal to actuators (801, 802, 803) of the power tool (10), wherein at least one actuator (801, 802, 803) is configured to switch the drive unit (20) between the at least one non-impacting operating mode and the associated impact mode upon activation by the communication interface (400). 15. Hand tool according to one of the preceding claims,

characterized in that the communication interface (400) according to Type of wireless transmission module (401) is formed, in particular as a radio module (405) for wireless communication via Bluetooth standard.