EP3238880A1 - Machine-outil manuelle comprenant une unité de limitation de couple électronique - Google Patents

Machine-outil manuelle comprenant une unité de limitation de couple électronique Download PDF

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Publication number
EP3238880A1
EP3238880A1 EP17161283.1A EP17161283A EP3238880A1 EP 3238880 A1 EP3238880 A1 EP 3238880A1 EP 17161283 A EP17161283 A EP 17161283A EP 3238880 A1 EP3238880 A1 EP 3238880A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
torque
user
tool according
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17161283.1A
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German (de)
English (en)
Other versions
EP3238880B1 (fr
Inventor
Florian Bantle
Thomas Duerr
Istvan SZELL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP3238880A1 publication Critical patent/EP3238880A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor

Definitions

  • the present invention relates to a power tool with a drive unit for driving an insert tool in at least one non-impact mode, wherein by means of an electronic torque limiting unit a plurality of torque levels of the drive unit in the at least one non-impact mode of operation is adjustable.
  • an electric hand tool machine for screwing, drilling and impact drilling known.
  • this hand tool machine in addition to an electronic speed control and a direction of rotation switching the possibility of limiting a respective deliverable torque is given to a user-definable value.
  • a circuit used in the form of an electronic module in a corresponding tool housing of the power tool compares for this purpose a currently recorded by a corresponding electric drive motor current, each of which increases proportionally with a respective output torque, with a setpoint potentiometer by means of a setpoint current value. If the current absorbed by the drive motor and thus the torque applied to an output spindle of the handheld power tool exceeds this preset nominal current value, then the circuit of the drive motor is interrupted and the power tool is turned off.
  • the invention relates to a power tool with a drive unit for driving an insert tool in at least one non-impact mode, wherein by means of an electronic torque limiting unit a plurality of torque levels of the drive unit in the at least one non-impact mode of operation is adjustable.
  • a communication interface is provided for communicating with a user-operable user guidance unit and adapted to receive from the user guidance unit switching instructions for application-specific torque level adjustment by the electronic torque limiting unit, wherein the user guidance unit is associated with at least one mechanical control element for manually setting a torque level via the communication interface ,
  • the invention thus enables a precise adjustment of a torque which is deliverable from the hand tool machine maximum of the insert tool, wherein at the same time a high repeat accuracy and safe reproducibility of each preselected torque is given.
  • the insertion tool may be, for example, a screwdriver bit, a drill, a tap or the like.
  • the electronic torque limiting unit may be configured to automatically preset the lowest torque level when changing to the at least one non-impact mode of operation, such as a screw or drill mode.
  • the user guidance unit is at least partially integrated into the handheld power tool and / or at least partially designed as an external, separate component.
  • the user guidance unit preferably has a mobile computer, in particular a mobile computer designed in the manner of a smartphone or tablet computer.
  • the user guidance unit preferably has at least one interactive program, in particular a smartphone app, for communication with the communication interface.
  • the communication interface is preferably designed to transmit a first control signal predetermined via the mechanical operating element to the electronic torque limiting unit for setting a torque step.
  • the at least one mechanical operating element with a rotary encoder is formed.
  • the rotary encoder which may for example be designed in the manner of a disc-shaped knurled, a particularly ergonomic and intuitive setting of the torque level is possible.
  • the rotary encoder is preferably provided with a fine-stage detent to prevent uncontrolled rotation.
  • the at least one mechanical operating element is formed with a ring key, a rocker switch or at least one key.
  • the user guidance unit is associated with at least one optical display which is designed to generate a display for the user for the visualization of a current torque level.
  • the optical display as an analog bar graph and / or a numerical digital display, in particular as a segment display is formed.
  • a sequential increase or decrease in the torque level is preferably accompanied.
  • the communication interface is preferably designed to transmit a second control signal, which is independent of the first control signal, for setting the torque stage to the electronic torque limiting unit.
  • the communication interface is preferably designed in the manner of a wireless transmission module, in particular as a radio module, for wireless communication by means of a Bluetooth standard.
  • the mobile computer has at least one electronic control element, in particular at least one icon displayed on a touch-sensitive screen, which is designed to cause the delivery of the second control signal from the communication interface to the electronic torque limiting unit.
  • Fig. 1 shows a hand tool 10 with a tool housing 12, which is designed for example as a cordless combi drill, preferably for mains-independent power supply mechanically and electrically with a battery pack 85 is connectable.
  • a cordless combi drill preferably for mains-independent power supply mechanically and electrically with a battery pack 85 is connectable.
  • the present invention is not limited to cordless impact drivers, but rather in different hand tool machines, such as a Impact wrench or a percussion drill, can be used. This is also independent of whether the power tool 10 is non-electrically or electrically operated, ie network-dependent or network-independent or battery-powered.
  • a drive unit 20 is preferably arranged for the rotating drive of an insertion tool 42 in at least one non-impact mode of operation.
  • the drive unit 20 has, by way of example, an electric drive motor 22, a preferably switchable transmission 90, an optional percussion mechanism 30 for the striking drive of the insert tool 42 received by way of example in a tool holder 40 in a striking mode of the handheld power tool 10, and an electronic torque limiting unit 70.
  • the drive motor 22, the shiftable transmission 90, the optional impact mechanism 30 and the tool holder 40 are illustratively arranged rotationally symmetrical to a longitudinal central axis 50 of the drive unit 20.
  • the tool holder 40 is merely exemplarily designed as a quick-release device 44 with a tool-free rotatable clamping ring 46 for radial clamping of the insert tool 42 by means of three clamping jaws 48 by way of example.
  • the preferably replaceable insert tool 42 may be e.g. to trade a drill or a bit holder with a screwdriver bit.
  • the tool housing 12 further has an ergonomically shaped handle 14 with an integrated handset 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 emitting 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 located on the handle 14 preferably a direction of rotation switch 24 for changing the direction of rotation of the drive motor 22 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 preferably electrically operated drive motor 22 is positioned in a rear portion 28 of the tool housing 12, resulting in a stable equilibrium position of the power tool 10 around the handle 14 around.
  • the switchable and preferably designed in the manner of a spatially compact design planetary gear transmission 90 of the power tool 10 is preferably switchable at least between a first and second gear.
  • the first, preferably slow, gear ratio is the non-impact mode of operation, e.g. a screwing mode assigned and assigned the second, preferably faster gear stage a drilling mode and / or the beat mode.
  • 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.
  • the handheld power tool 10 has a preferably bidirectional communication interface 100, 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 100 is preferably configured to receive from the user guidance unit 60 switching instructions 72 for application-specific setting of a torque stage by means of the electronic torque limiting unit 70.
  • the communication interface is in the embodiment shown here by way of a wireless transmission module 102, in particular as a radio module 104 for wireless communication by means of Bluetooth ® standard is executed.
  • the user guide unit 60 positioned here by way of example on the upper side 36 of the tool housing 12 merely exemplarily has two manually operable operating elements 62, 64 which are designed to selectively increase or decrease the torque applied to the tool holder 40 in the at least one non-impact operating mode.
  • the torque applied to the tool holder 40 can be increased by one step by pressure-wise actuation of the mechanical operating element 62 on the part of the user, and lowered by one step by actuating the mechanical operating element 64 again.
  • the two mechanical operating elements 62, 64 can be realized, for example, as electrical switches, buttons or membrane keys.
  • the two mechanical operating elements 62, 64 are also assigned an optical display 66 for visualizing the height of the torque currently being applied to the tool holder 40 or can be tapped off.
  • the optical display 66 is realized here merely by way of example with an analog bar graph 68 with six colored light-emitting diodes.
  • the communication interface 100 is preferably configured to process the switching instructions 72 prescribed by the two mechanical operating elements 62, 64 and to generate a first control signal 74, which is transmitted to the electronic torque limiting unit 70 for setting the torque level selected by the user.
  • the analog bar display 68 of the optical display 66 is also activated, thus giving the user an optical-visual feedback about the currently active torque step.
  • the optical display 66 as an analog bar display 68, which is merely shown here by way of illustration, this can also be designed, for example, with a numerical digital display, in particular a segment display or a dot-matrix display.
  • the communication interface 100 is preferably designed to transmit a second control signal 76 independent of the first control signal 74 for adjusting the torque level to the electronic torque limiting unit 70.
  • the communication interface 100 for the bidirectional data exchange by means of the switching instructions 72 with the communication interface 100 preferably at least one interactive, in the figures not shown program, in particular a smartphone app, deposited.
  • the drive motor 22 is preferably controlled by the electronic torque limiting unit 70 with the aid of a control signal 80 in such a way that the torque level predetermined by a user is always active.
  • the detection of the currently output by the drive motor 22 each torque can, for example, indirectly via a recorded by the drive motor 22 electrical (supply) power and / or directly by means of a suitable torque sensor, in particular a force measuring sensor optionally incorporating data of a speed sensor for detecting the current Speed of the tool holder 40, done.
  • the user guidance unit 60 may, according to a further embodiment of the invention, be at least partially integrated into the tool housing 12 of the handheld power tool 10 and / or at least partially as an external, separate component (302 in FIG Fig. 3 ) be configured.
  • Fig. 2 shows the hand tool of Fig. 1 with a user guide unit 200, which according to a second embodiment, in contrast to the first embodiment of Fig. 1 a mechanical operating element 202, which is preferably realized with a rotary encoder 204.
  • the rotary encoder 204 has a ribbed and freely rotatable rotary wheel 206 arranged transversely to the longitudinal center axis 50 for setting a torque step by the user.
  • the preferably peripherally operable by the user on all sides rotary knob 206 is illustratively positioned in the region of a neck 38 of the tool holder 40 of the tool housing 12 and corresponds approximately to its diameter, for example, by the rotation of the rotary knob 206 in the clockwise direction increases the torque level of the power tool 10 successively. Conversely, the torque step gradually decreases by rotating the rotary knob 206 in the counterclockwise direction.
  • the rotary wheel 206 has a locking unit in order to avoid an uncontrolled adjustment of the torque level of the hand tool 10.
  • the rotary wheel 206 is preferably provided with a corrugation to increase the ease of use.
  • the user guidance unit 200 preferably further comprises a second mechanical operating element 208, a third mechanical operating element 210 and a fourth mechanical operating element 212, each of which has a key-like design.
  • the control elements 208, 210, 212 are preferably associated with an analog bar display 214 extending transversely to the longitudinal central axis 50 for displaying the respective active torque step of the handheld power tool 10.
  • the operating elements 208, 210, 212 is in each case an unrepresented light source for optically displaying the respective active operating mode of the handheld power tool 10.
  • the analog bar display 214 the shape of which approximately corresponds here to that of a rectangular trapezoid, serves to display the respectively active.
  • the three mechanical, key-like controls 208, 210, 212 and the analog bar display 214 are summarized in a raised relative to the top 36 of the tool housing 12, rectangular control panel 216 of the user guide unit 200.
  • one of the smaller turning wheels 218, 220, 222 may be inserted parallel or transverse to the longitudinal central axis 50, adjacent to the control panel 216 and partially into the upper side 36 of the tool housing 12, whereby the Rotary wheels 216, 218, 220 are accessible to the user single top side and at the same time protected against unintentional twisting.
  • the second operating element 208, the third operating element 210 and the fourth mechanical operating element 212 are preferably designed in each case as a first (foil) button, a second (foil) button and as a third (foil) button, which are preferably largely pollution-resistant and also easy to clean.
  • Fig. 3 shows the power tool 10 of Fig. 1 with a third embodiment of a user guidance unit 300, which preferably has a mobile computer 302 as an external component 150.
  • the mobile computer 302 or the external component 150 is embodied here in the manner of a smartphone 304 or a tablet computer 306 with a touch-sensitive screen 308 or with a touchscreen.
  • the user guide unit 300 of the hand tool 10 is also equipped with the rotary wheel 206 and the control panel 216 for setting a torque level and for selecting an operating mode and its visual display, so that in terms of further constructive details - to avoid repetitive content - at this point to their description in Frame of Fig. 2 can be referenced.
  • the screen 308 has, for example, five electronic control elements 310 to 318, which are illustratively formed here with five icons 322, 324, 326, 328, 330. Furthermore, on the screen 308 there is an analog bar display 320 with a circumferential contour, which for example corresponds to that of a rectangular trapezoid.
  • the first icon 322 is for user-selecting the screw mode
  • the second icon 324 is for turning on the Bohrmodus
  • the third icon 326 is provided for activating the beat mode, each with a short tap of the icon 322, 324, 326 by the user with the finger is sufficient to activate the desired operating mode of the power tool 10.
  • At least the three icons 322, 324, 326 can visually display the respectively active operating mode of the handheld power tool 10 to the user by means of visual highlighting, for example by means of a frame.
  • the user may preferably increase or decrease the torque level of the handheld power tool 10.
  • the bar display 320 serves only for visual display of the currently set torque level of the power tool 10 and preferably has no actuation function or touch functionality held.
  • the setting of the torque level of the power tool 10 by means of a sixth electronic control element 332 done, which is realized here only by way of example with a dotted-hinted, slide-like icon 334.
  • the inputs thus made by the user are transmitted as wireless switching instructions 78 from the mobile computer 302 to the communication interface 100 and therein at least for generating the second control signal (76, FIG. Fig. 1 ) for driving the electronic torque limiting unit (70, Fig. 1 ) of the hand tool 10.
  • the torque stage of the handheld power tool 10 can also be adjusted easily and intuitively by means of the rotary wheel 206 arranged on the handheld power tool 10.
  • the rotary wheel 206 of the user guidance unit 300 again switching instructions (72, Fig. 1 ) and supplied to the wireless communication interface 100 and in this for generating the first control signal (74, Fig. 1 ) which then passes to the torque limiting unit (70, Fig. 1 ) for setting the desired torque level of the drive motor (22, Fig. 1 ) is supplied to the power tool 10.
  • the transmission of the wireless escape sequences 78 may, for example, by means of the known radio transmission standards Bluetooth ®, carried WLAN or WiFi, or other transmission standards.
  • Fig. 4 shows a rotary wheel 400, which for the realization of the rotary wheel 206 of Fig. 2 can be used.
  • the rotary wheel 400 is preferably - as indicated by the double arrow 402 - both clockwise and counterclockwise about its longitudinal center axis 404 freely rotatable, ie the rotary wheel 400 can rotate stop-free clockwise or counterclockwise about the longitudinal central axis 50.
  • the longitudinal center axis 404 may be connected to the longitudinal center axis of the hand tool 10 of Fig. 1 and Fig. 2 coincide.
  • a preferably at least substantially hollow-cylindrical main body 406 of the rotary wheel 400 has a first and a second end face 408, 410, which are each formed in an annular shape.
  • an example, incremental, optically scannable pattern 412 is provided by means of a sensor element 414, in particular by means of a photoelectric reflex sensor, for detecting the respective angular position and the direction of rotation of the rotary wheel 400 without contact and can be scanned with high accuracy and resolution.
  • a locking device may be provided.
  • the rotary wheel 400 preferably on the periphery of a corrugation 416 and / or a rubber coating, if necessary. together with a not shown detent spring can represent the locking device.
  • the current rotational angle position determined by means of the sensor element 414 and the direction of rotation or the direction of rotation of the rotary wheel 400 are used as switching instructions to the communication interface 100 of FIG Fig. 1 and there to the first control signal to control the electronic torque limiter 70 of Fig. 1 the hand tool 10 of Fig. 1 processed.
  • the non-contact rotary wheel 400 can thus take the place of the mechanical operating elements of the first embodiment of the user guide unit of the handheld power tool realized only by way of example with the (foil) buttons (cf., in particular, FIG. Fig.1 ).
  • Fig. 5 shows a rotary wheel 450, which also for the realization of the rotary wheel 206 of Fig. 2 can be used.
  • the rotary wheel 450 is preferably in turn - as indicated by a double arrow 452 - both clockwise and counterclockwise designed around its associated longitudinal central axis 454 freely rotatable.
  • the determination of the current angle of rotation and the direction of rotation of the rotary wheel 450 in relation to the longitudinal central axis 454 takes place deviating from the first embodiment of the rotary wheel 400 of FIG Fig. 4 preferably by means of a non-contact magnetic sensor element 456 and a plurality of non-consistently designated, as well as peripherally suitably spaced from each other arranged on the base body 458 permanent magnet 460th
  • the permanent magnets 460 are preferably embedded in an end face 462 of the rotary wheel 450 facing the sensor element 456. Instead of discrete permanent magnets 460, a suitable magnetization pattern may also be formed in the region of the front side 462 of the rotary wheel 450.
  • the magnetic Sensor element 456 can be realized, for example, with a Hall sensor, with a reed contact or the like. Furthermore, a corrugation 464 and / or a rubber coating of the rotary wheel 450 may be provided on the circumference.
  • Fig. 6 shows a rotary 500, which also for the realization of the rotary wheel 206 of Fig. 2 can be used.
  • the rotary wheel 500 is also - as indicated by the double arrow 502 - both in a clockwise and counterclockwise direction freely rotatable about a longitudinal center axis 504.
  • a hollow cylindrical main body 506 of the rotary wheel 500 has a first and a second annular end face 508, 510.
  • the main body 506 is preferably provided with a peripherally formed corrugation 512 and / or rubber coating.
  • An annular disk 514 which is non-rotatable with respect to the rotary wheel 500 is preferably covered with a self-contained, likewise annular resistance track 516 positioned concentrically with the disk 514.
  • On the first end face 508 of the rotary wheel 500 is preferably a sliding contact 518, the spring-loaded against the resistance path 516 is applied.
  • An ohmic resistor 522 which can be tapped off between an electrical terminal contact 520 of the resistance track 516 and the sliding contact 518 is preferably proportional to the absolute rotational angle of the rotary wheel 500 when the resistance track 516 is designed to be linear, similar to a sliding potentiometer.
  • the ohmic resistance 522 measured between the sliding contact 518 and the terminal contact 520 of the resistance track 516, it is possible, for example, to increase or decrease the resistance. It can be easily determined whether the rotary wheel 500 has rotated clockwise or counterclockwise relative to the longitudinal central axis 504. For example, the total number of full 360 ° revolutions made by the dial 500 can be easily determined from the number of minimum values of the resistor 522.
  • the control of the electronic torque limiting unit of the power tool is analogous to the first embodiment of the rotary of Fig. 4 ,
  • Fig. 7 shows a ring button 550, according to one embodiment, the two mechanical controls of Fig. 1 replace, for example, instead of the above-described wheels.
  • the ring button 550 preferably has an approximately cylindrical main body 552 with an opening 554, wherein the main body 552 and the opening 554 are preferably each rotationally symmetrical to a longitudinal central axis 556 are formed.
  • a radially outwardly directed, cuboid projection 558 is integrally formed for actuating the ring button 550 by a finger or the thumb of the user.
  • a first and a second, cuboid switching cam 560, 562 are preferably integrally formed to the main body 552, which serve to actuate a first and a second, eg electromechanical switching contact 564, 566.
  • ring switch 550 In the in Fig. 7 illustrated position is the ring switch 550 in its rest or center position, in which the two switching contacts 564, 566 are unconfirmed and therefore electrically open. Since both switching cam 560, 562 by means of spring elements 568, 570 are biased opposite to each other in relation to the longitudinal center axis 556, the ring button 550 remains in the unactuated or released by the user state permanently in the rest position shown or stable equilibrium position.
  • the first switching contact 564 is electrically closed against the force action of the first spring element 568.
  • the second switching contact 566 is electrically closed against the force of the second spring element 570 when the user pivots the projection 558 and thus the ring button 550 in a direction "-" about the longitudinal central axis 556 around.
  • electromechanical switch contacts 564, 566 non-contact, electronic and therefore wear-free switch can be provided.
  • the switching instructions thus generated by the electrical switch contacts 564, 566 are in turn connected to the communication interface 100 of FIG Fig. 1 the hand tool 10 of Fig. 1 forwarded and there to the processed first control signal, which in turn for driving the electronic torque limiting unit 70 of Fig. 1 serves.
  • a user can conveniently and intuitively by two-sided pivoting of the particularly ergonomic Ringtaster 550, the torque level of the power tool 10 of Fig. 1 increase or decrease.
  • the ring button 550 is preferably so far in the tool housing 12 of the power tool 10 of Fig. 1 let in that the projection 558, in particular to reliably prevent inadvertent actuation of the ring button 550 by the user, substantially flush with the tool housing 12.
  • Fig. 8 shows a rocker switch 600, which can replace the above-described rotary wheels according to one embodiment.
  • the rocker button 600 is preferably - as indicated by a double arrow 604 - about a tilt axis 602 tilted in the tool housing 12 of the power tool 10 of Fig. 1 added.
  • the rocker button 600 preferably has a main body 606 with a first and a second cuboid rocker arm 608, 610, which abut one another at the obtuse angle in the region of the tilt axis 602.
  • the rocker button 600 in turn has a first and a second electrical switching contact 612, 614, which in the in Fig. 8 illustrated resting or equilibrium position of the rocker switch 600 are preferably unconfirmed.
  • switching instructions are generated, which in turn communicate with the communication interface 100 of FIG Fig. 1 the hand tool 10 of Fig. 1 supplied and further processed to the first control signal which, in turn, for driving the electronic torque limiting unit 70 of Fig. 1 serves.
  • Fig. 9 shows a user guide unit 650 according to another embodiment.
  • This preferably comprises a first mechanical operating element 652, which in turn is preferably designed as a freely rotatable rotary wheel 654 and for the user-side adjustment of a torque level of the power tool 10 of Fig. 1 serves.
  • the user-reachable rotary wheel 654 is transverse to the longitudinal central axis 50 in the region of the conical neck 38 of the tool housing 12 of the power tool 10 of Fig. 1 arranged and in this case includes the neck 38 completely.
  • the user guidance unit 650 preferably further comprises three mechanical, key-like operating elements 656, 658, 660, which are realized here by way of example as dust-tight as well as easy-to-clean (foil) buttons and which, for the sake of clarity, do not bear any reference numerals.
  • the user guidance unit 650 preferably includes an optical display 662, which in turn is embodied here in an exemplary manner as an analog bar graph 664.
  • the three operating elements 656, 658, 660 are preferably in turn combined in a quadrangular control panel 666 of the user guidance unit 650 raised in relation to the upper side 36 of the tool housing 12.
  • the analog bar graph 664 for displaying the currently active torque step of the power tool 10 of Fig.
  • thirteen comprises luminous elements which are not designated for the sake of better graphical clarity and which are preferably realized with colored light-emitting diodes.
  • Each luminous element can, for example, a torque level of the power tool 10 of Fig. 1
  • the analog bar graph 664 in its entirety, has by way of example a rectangular peripheral contour.
  • the analog bar graph 664 here outside of the control panel 666 or is not integrated into this.
  • the second mechanical operating element 656 preferably serves to activate the screwing mode of the handheld power tool 10 of FIG Fig .1
  • the third mechanical operating element 658 is preferred for activating the drilling mode of the handheld power tool 10 of FIG Fig. 1 provided and by means of the fourth mechanical Control element 660 is preferably the impact mode of the power tool 10 of Fig. 1 switched on.
  • the currently active operating mode of the power tool 10 of Fig. 1 This is preferably effected by the lighting up of the associated control element 656, 658, 680 or of an icon 668, 670, 672 respectively associated therewith.
  • light sources in particular light-emitting diodes, respectively below the arranged here as (foil) button controls 656 to 660 are arranged.
  • the first icon 668 represents a screw for indicating the active screwing mode
  • the second icon 670 symbolizes a drill for visualizing the active drilling mode
  • the third icon 672 represents a hammer for displaying the Impact mode of hand tool 10 of Fig. 1
  • Fig. 9 is exemplary of the screwing mode of the power tool 10 of Fig. 1 activated, which is indicated by the plurality of outwardly directed radially with respect to the first icon 668 strokes.
  • Fig. 10 shows a user guide unit 700 according to another embodiment.
  • this preferably comprises a first mechanical operating element 702, which in turn is designed as a rotary wheel 704 and which serves for the user-side adjustment of a torque level of the handheld power tool.
  • a display 710 designed as an analog bar graph 708 is integrated to visualize the respectively active torque stage.
  • the analog bar graph 708 has, by way of example, nine light elements realized by way of example with light-emitting diodes.
  • the analog bar display 708 runs parallel to the longitudinal central axis 50 of the tool housing 12 of the portable power tool 10 of FIG Fig. 1 and is preferably adjacent to a second mechanical operating element 712 configured in the manner of a (foil) button for activating the screwing mode arranged, which has an icon 714 in the form of a screw.
  • Fig. 10 is the screwing mode of the power tool 10 of Fig. 1 activated, which is illustrated by the flashing screw symbol.
  • a number of the respectively active light elements of the analog bar display 708 is preferably proportional to the torque level of the handheld power tool 10 of each activated by the user Fig. 1 ,
  • the structure of the user guide unit 700 corresponds to that of the embodiment of FIG Fig. 9 At this point, in order to avoid content repetition, to the explanations in the description of the Fig. 9 referenced.
  • Fig. 11 shows a rotary wheel 800, which according to an embodiment instead of the rotary wheel 206 of Fig. 2 Can be used.
  • the rotary wheel 800 is preferably - as indicated by a double arrow 802 - both the clockwise and counterclockwise by the user freely rotatable about a longitudinal central axis 804.
  • An illustratively at least substantially hollow-cylindrical main body 806 of the rotary wheel 800 preferably has a first and a second, respectively approximately annular end face 808, 810.
  • the main body 806 is preferably provided with a peripherally formed corrugation 812 and / or a rubber coating.
  • a triangular toothing 814 with a multiplicity of triangular teeth 816, not indicated continuously, is formed.
  • a coupling element 820 designed here by way of example as a two-sided lever is provided, which preferably has a cylindrical bearing journal 822.
  • the lever-like coupling element 820 is preferably pivotable in the tool housing 12 of the handheld power tool 12 by means of the bearing pin 822 running perpendicular to the longitudinal central axis 804 Fig. 1 added.
  • a first and a second lever arm 824, 826 are formed by way of example, wherein the two lever arms 824, 826 are preferably radially offset from each other and extend in a rest position of the coupling element 820 shown here in each case parallel to the longitudinal central axis 804.
  • the first lever arm 824 illustratively points in the direction of the drive unit 20 of the handheld power tool 10 of FIG Fig. 1 while the second lever arm 826 in the direction of the rotary wheel 800 and the tool holder 40 of the power tool 10 of Fig. 1 is directed.
  • the first lever arm 824 preferably has at its end a fork 828 into which an actuating cam 830 of an electrical switching element 832 engages.
  • This electrical switching element 832 is executed here only by way of example in the manner of an electromechanical changeover switch with a stable central position in the unactuated state.
  • the electrical switching element 832 preferably has a first, a second and a third terminal 836, 838, 840. Between the first and the second electrical connection 836, 838 is preferably a first closer 842, while between the second and the third electrical connection 838, 840, a second closer 844 is present.
  • the two make 842, 844 are each exemplified as a button, i. they automatically return to the opened switching state in the unactuated state. In the rest position of the electrical switching element 832 shown here, i. with unactuated actuation cam 830, both make contacts 842, 844 are in the open state, i.
  • the second lever arm 826 is in the rest position illustrated here preferably between two circumferentially immediately adjacent teeth 816 of the triangular gearing 814 and in a valley of the triangular gearing 814, of which only one valley 846 is representative of all the rest.
  • the second lever arm 826 is preferably overrun by at least one tooth 816 of the triangular toothing 814 and the coupling element 820 pivots about the bearing pin 822 far enough that the fork 828 on the first lever arm 824 the actuating cam 830 of the electric switching element 832 tilted sideways and / or axially depresses and in consequence the second closer 844 is closed.
  • the second closer 844 is opened again when a valley of the triangular toothing 814 passes through the second lever arm 826 of the coupling element 820.
  • the first closer 842 of the switching element 832 is opened and closed at least once by means of the second lever arm 826 that can be overrun by the triangular toothing 814, whereby the torque step of the electronic torque limiting unit 70 of FIG Fig. 1 preferably again reduced by one level.
  • the latching in the triangular gearing 814 recorded second lever arm 826 of the coupling element 820 gives the user a haptic intuitive and clearly perceptible feedback about any increase or decrease in the torque level of the electronic torque limiting unit 70 of the power tool 10 of Fig. 1 , wherein at the same time in the illustrated here rest position of the rotary wheel 800 due to the locking action of the coupling element 820 in conjunction with the triangular teeth 814 unwanted or uncontrolled rotational movement of the rotary wheel 800 is reliably excluded.
  • the coupling element 820 allows an optimal adjustment of an actuating travel of the actuating cam 830 of the switching element 832 to a axial toothing depth 850 of the triangular toothing 814 between the teeth and the valleys or a toothing geometry of the triangular toothing 814.
  • Fig. 12 shows a rotary wheel 900, which according to an embodiment also instead of the rotary wheel 206 of Fig. 2 Can be used and, as indicated by a double arrow 902, preferably freely rotatable about its longitudinal center axis 904 by the user.
  • the rotary knob 900 preferably also has a substantially hollow cylindrical base body 906 with a first and a second end face 908, 910. On the circumference, a corrugation 912 and / or a rubber coating for ease of operation is provided on the base body 906 by way of example.
  • triangular toothing 914 is again preferably formed with a multiplicity of circumferentially alternating teeth and valleys, of which only one tooth 916 and one valley 918 are representatively provided with a reference numeral for all others. Both the valleys and the teeth each have an approximately triangular cross-sectional geometry.
  • an actuating cam 830 of the electrical switching element 832 of Fig. 11 directly with the triangular teeth 914 of the rotary wheel 900 together, resulting in a structurally simplified structure.
  • the actuating cam 830 preferably has an approximately triangular cross-sectional geometry such that the teeth and valleys of the triangular gearing 914 override the actuating cam 830 in a user-defined rotation of the rotary wheel 900 for alternately opening and closing the two shutters 842, 844 of the electrical switching element 832.
  • the mode of operation of the embodiment shown here follows the rotary wheel 800 of FIG Fig. 11 , so that at this point - to avoid repetition of content - on the relevant parts of FIG. 11 referenced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Portable Power Tools In General (AREA)
EP17161283.1A 2016-04-12 2017-03-16 Machine-outil manuelle comprenant une unité de limitation de couple électronique Active EP3238880B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016206050.3A DE102016206050A1 (de) 2016-04-12 2016-04-12 Handwerkzeugmaschine mit einer elektronischen Drehmomentbegrenzungseinheit

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EP3238880A1 true EP3238880A1 (fr) 2017-11-01
EP3238880B1 EP3238880B1 (fr) 2021-12-22

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Cited By (3)

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AT523566A1 (de) * 2020-03-10 2021-09-15 Weber Hyraulik Gmbh Verfahren zum Betreiben eines Rettungssystems mit einem mobilen Rettungsgerät
WO2022247813A1 (fr) * 2021-05-11 2022-12-01 苏州宝时得电动工具有限公司 Outil électrique et son procédé de commande
EP4219080A1 (fr) * 2022-01-28 2023-08-02 Black & Decker Inc. Outil électrique muni d'un embrayage électronique

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DE102018201090A1 (de) * 2018-01-24 2019-07-25 Robert Bosch Gmbh Haltevorrichtung für eine Handwerkzeugmaschine
DE102018208048A1 (de) 2018-05-23 2019-11-28 Robert Bosch Gmbh Handwerkzeugmaschine
DE102018217152A1 (de) * 2018-10-08 2020-04-09 Robert Bosch Gmbh Handwerkzeugmaschine
DE102019209851A1 (de) * 2019-07-04 2021-01-07 Robert Bosch Gmbh Handwerkzeugmaschine mit einem elektronisch kommutierten Motor
DE102020211889A1 (de) 2020-09-23 2022-03-24 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine
DE102020212708A1 (de) 2020-10-08 2022-04-14 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine
DE102022207599A1 (de) 2022-07-26 2024-02-01 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine

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AT523566A1 (de) * 2020-03-10 2021-09-15 Weber Hyraulik Gmbh Verfahren zum Betreiben eines Rettungssystems mit einem mobilen Rettungsgerät
AT523566A8 (de) * 2020-03-10 2022-03-15 Weber Hydraulik Gmbh Verfahren zum Betreiben eines Rettungssystems mit einem mobilen Rettungsgerät
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WO2022247813A1 (fr) * 2021-05-11 2022-12-01 苏州宝时得电动工具有限公司 Outil électrique et son procédé de commande
EP4219080A1 (fr) * 2022-01-28 2023-08-02 Black & Decker Inc. Outil électrique muni d'un embrayage électronique

Also Published As

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DE102016206050A1 (de) 2017-10-12
CN107283369A (zh) 2017-10-24
CN107283369B (zh) 2022-09-23
EP3238880B1 (fr) 2021-12-22

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