EP3581332B1 - Electric tool, in particular drill driver - Google Patents

Electric tool, in particular drill driver Download PDF

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Publication number
EP3581332B1
EP3581332B1 EP18197884.2A EP18197884A EP3581332B1 EP 3581332 B1 EP3581332 B1 EP 3581332B1 EP 18197884 A EP18197884 A EP 18197884A EP 3581332 B1 EP3581332 B1 EP 3581332B1
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EP
European Patent Office
Prior art keywords
actuating element
power tool
adjusting
electric power
tool according
Prior art date
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Application number
EP18197884.2A
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German (de)
French (fr)
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EP3581332A1 (en
Inventor
Gabor Papp
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
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Robert Bosch GmbH
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Publication date
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Publication of EP3581332A1 publication Critical patent/EP3581332A1/en
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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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose

Definitions

  • the invention relates to a power tool, in particular a drill driver, according to the preamble of claim 1.
  • a power tool is out of the DE 10 2004 051 911 A1 known to the applicant.
  • the well-known power tool has two adjusting rings designed as separate actuating elements, the first adjusting ring being used for the "drilling" and “screwdriving" operating modes with the possibility of setting a maximum torque to be transmitted, and the other adjusting ring for setting a percussion drilling function.
  • the operator In order to set and change operating parameters in different operating modes, the operator therefore has to operate two separate actuating elements or adjusting rings, with only one of the actuating elements being active in each case. The operation therefore requires knowledge of the functionality of the two operating elements.
  • the well-known power tool has a relatively complex structure due to the two adjusting rings and the arrangement of the two actuating elements requires a relatively large amount of space.
  • EP 1 857 228 A1 is a power tool, according to the preamble of claim 1, known with several operating modes and a clutch for adjusting a torque.
  • the invention is based on the object of further developing a power tool, in particular a drill/driver, according to the preamble of claim 1 in such a way that its construction is simplified by reducing the number of adjustment elements and at the same time the operator is able to operate it in a relatively simple manner .
  • This task is achieved with a power tool, in particular a drill/driver, with the features of claim 1.
  • the invention is based on the idea of actuating the two adjusting devices for the respective operating modes via a common actuating element. In other words, this means that two adjusting devices can be actuated in different operating modes by means of a single actuating element.
  • the invention also has the advantage that the savings in operating elements make it possible to have a particularly compact design of the power tool, since only one installation space is required for a single actuating element.
  • the actuating element be designed as a mechanical actuating element in the form of a slide or rotary switch.
  • the actuating element have a first adjustment range in which the actuating element can only be used with the first adjustment device interacts, and with a second adjustment area adjoining the first adjustment area, in which the actuating element interacts exclusively with the second adjustment device.
  • the first adjusting device for torque setting has a potentiometer for detecting the position of the actuating element, the resistance value of which can be changed by means of a contact element which is arranged on the actuating element and acts as a bridge between conductor tracks.
  • an embodiment in which the position of the actuating element is shown by means of an optical display.
  • an optical display can be detected relatively easily by an operator and thus enables the desired switching position of the actuating element to be set particularly precisely.
  • the visual display is arranged in the area of the adjustment path of a control element of the actuating element.
  • a power tool 10 according to the invention in the form of a battery-operated drill driver 1 is shown.
  • the power tool 10 has, in a manner known per se, a drive motor 11 which acts on a drive spindle 13 via a gear 12 .
  • the transmission 12 of the power tool 10 has at least two gear stages (not shown), of which the first gear stage, which has a higher reduction than the second gear stage, is used for screwdriving, while the second gear stage is suitable for drilling. It is also important that the maximum torque to be transmitted from the drive motor 11 to the drive spindle 13 can be set for the screwing function.
  • actuating element 15 is implemented as a slide switch designed as a rotary ring 16 in the exemplary embodiment shown.
  • the actuating element 15 could also be designed as a rotary switch instead of as a rotating ring 16 .
  • the rotary ring 16 can be adjusted in the housing of the drill/screwdriver 1 within a specific rotary angle range.
  • a control element 17 that can be actuated from the outside by the operator and that is within the adjustment range or the rotation angle range is used for this purpose of the rotary ring 16 is preferably continuously adjustable.
  • the respective position of the operating element 17 or the rotating ring 16 is displayed via a visual display 18 .
  • the optical display 18 comprises two display fields 19, 20 which are arranged separately from one another and in which, in particular, a large number of LEDs are arranged. It is essential here that in one display field 19 the actuating element 15 is in the first operating mode mentioned, in which the drill driver 1 enables screwing operation, while the second display field 20 is used to display the drilling operation.
  • the display panels 19, 20 are arranged in such a way that the LEDs that are lit in each case correlate with the position of the operating element 17 or are aligned.
  • the rotating ring 16 has an electrically acting contact element 22 on its one end face, which is received in a form-fitting manner on the rotating ring 16 in a preferably injection-molded recess.
  • the contact element 22 is part of a potentiometer 25 which is formed on a circuit board 26 in the form of an arc.
  • the circuit board 26 is in turn connected to a circuit carrier 27 on which evaluation means 28 are arranged, which are suitable for detecting the position of the contact element 22 relative to the circuit board 26 .
  • the circuit board 26 has two conductor tracks 29, 30 which are arranged at a distance from one another and are electrically bridged by means of the contact element 22.
  • the setting or position of the contact element 22, and thus the angular position of the rotating ring 16, is detected in that, corresponding to the position of the rotating ring 16, the contact element 22 also assumes a unique position associated with the position of the rotating ring 16.
  • the contact element 22 bridges the two conductor tracks 29, 30 on the circuit board 26, so that the potentiometer 25 generates a very specific resistance value, which is detected by the evaluation means 28.
  • This detected value of the rotary angle position of rotary ring 16 is sent by evaluation means 28 as an input value to a control device (not shown in the figures) of power tool 10, which, based on the position of rotary ring 16 and possibly other additional input variables, determines the maximum torque to be transmitted of the Drive motor 1 by limiting the current of the drive motor 11 sets.
  • latching cams 31 are formed on the rotary ring 16, which interact with corresponding counter-means, for example in the housing, when the rotary ring 16 is rotated and on the one hand generate a haptically perceptible latching by the operator when turning the rotary ring 16 and on the other hand a corresponding noise which can be perceived by the operator.
  • an adjustment element in the form of an adjustment pin 33 is integrally formed on the rotating ring 16 .
  • the adjusting pin 33 is part of a gear selector switch 34, which corresponds to the Figures 7 to 9 a stationary guide housing 35 arranged in the power tool 10, in which a transmission plate 37 arranged to slide according to the double arrow 36 perpendicular to the direction of rotation of the rotating ring 16, whose direction of rotation is indicated by the double arrow 32, is arranged.
  • a guide groove 38 for the adjustment pin 33 is formed in the transmission plate 37 and is open at one end 39 .
  • the transmission plate 37 has on its upper side a latching cam 40 which interacts with two latching brackets 44 , 45 integrally formed on the guide housing 35 .
  • the locking cam 40 takes according to the position in the transmission plate 37 two, in the Figures 8 and 9 positions shown, in which the transmission plate 37, by means of a shift lever 41 coupled to the transmission plate 37, sets the transmission 12 of the power tool 10 either in first gear, which is intended for screwdriving, or in second gear, which is suitable for drilling.
  • the adjustment between the two positions, ie the respective overcoming of the latching brackets 44, 45 by the latching cam 40 can be perceived by the operator both haptically and acoustically.
  • the mode of operation of the gear selector switch 34 is as follows: in the position of the rotary ring 16 in which the contact element 22 is in the area of the conductor tracks 29, 30 of the potentiometer 25, which is equivalent to a first adjustment range 42 ( 2 ) of the rotary ring 16 for the screwing mode, the adjusting pin 33 is disengaged from the guide groove 38 of the transmission plate 37. This means that the shift lever 41 assumes a position in which the gear 12 of the power tool 10 is in first gear. Upon rotation of the rotary ring 16 over the range of the potentiometer 25 addition, which is equivalent to a second adjustment range 43, the adjustment pin 33 engages with the guide groove 38 of the transmission plate 37.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Elektrowerkzeug, insbesondere einen Bohrschrauber, nach dem Oberbegriff des Anspruchs 1.The invention relates to a power tool, in particular a drill driver, according to the preamble of claim 1.

Ein Elektrowerkzeug ist aus der DE 10 2004 051 911 A1 der Anmelderin bekannt. Das bekannte Elektrowerkzeug weist dabei zwei als separate Betätigungselemente ausgebildete Stellringe auf, wobei der erste Stellring für den Betriebsmodus "Bohren" und "Schrauben" mit der Möglichkeit der Einstellung eines maximal zu übertragenden Drehmoments, und der andere Stellring zum Einstellen einer Schlagbohrfunktion dient. Vom Bediener sind somit zum Einstellen und Wechseln von Betriebsparametern in unterschiedlichen Betriebsarten zwei voneinander getrennte Betätigungselemente bzw. Stellringe zu bedienen, wobei jeweils nur eines der Betätigungselemente wirksam ist. Die Bedienung erfordert daher die Kenntnis der Funktionalität der beiden Betätigungselemente. Weiterhin ist das bekannte Elektrowerkzeug durch die beiden Stellringe relativ aufwändig aufgebaut und die Anordnung der beiden Betätigungselemente benötigt einen relativ großen Bauraum.A power tool is out of the DE 10 2004 051 911 A1 known to the applicant. The well-known power tool has two adjusting rings designed as separate actuating elements, the first adjusting ring being used for the "drilling" and "screwdriving" operating modes with the possibility of setting a maximum torque to be transmitted, and the other adjusting ring for setting a percussion drilling function. In order to set and change operating parameters in different operating modes, the operator therefore has to operate two separate actuating elements or adjusting rings, with only one of the actuating elements being active in each case. The operation therefore requires knowledge of the functionality of the two operating elements. Furthermore, the well-known power tool has a relatively complex structure due to the two adjusting rings and the arrangement of the two actuating elements requires a relatively large amount of space.

Aus der EP 1 857 228 A1 ist ein Elektrowerkzeug, gemäß dem Oberbegriff des Patentanspruchs 1, mit mehreren Betriebsmodi und einer Kupplung zum Einstellen eines Drehmoments bekannt.From the EP 1 857 228 A1 is a power tool, according to the preamble of claim 1, known with several operating modes and a clutch for adjusting a torque.

Offenbarung der ErfindungDisclosure of Invention

Ausgehend von dem dargestellten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Elektrowerkzeug, insbesondere einen Bohrschrauber, nach dem Oberbegriff des Anspruchs 1 derart weiterzubilden, dass dessen Aufbau durch eine Reduzierung von Verstellelementen vereinfacht wird und dem Bediener gleichzeitig eine relativ einfache Bedienung ermöglicht wird. Diese Aufgabe wird bei einem Elektrowerkzeug, insbesondere einem Bohrschrauber, mit den Merkmalen des Anspruchs 1 gelöst. Der Erfindung liegt dabei die Idee zugrunde, die beiden Verstelleinrichtungen für die jeweiligen Betriebsmodi über ein gemeinsames Betätigungselement zu betätigen. Mit anderen Worten gesagt bedeutet dies, dass mittels eines einzigen Betätigungselements zwei Verstelleinrichtungen in unterschiedlichen Betriebsmodi betätigbar sind. Dadurch wird gegenüber dem Stand der Technik ein vereinfachter Aufbau durch eine reduzierte Bauteileanzahl ermöglicht. Gleichzeitig wird die Bedienung der beiden Verstelleinrichtungen vereinfacht. Die Erfindung hat darüber den Vorteil, dass durch die Einsparung von Bedienungselementen sich ein besonders kompakter Aufbau des Elektrowerkzeugs ermöglichen lässt, da lediglich Bauraum für ein einziges Betätigungselement benötigt wird.Proceeding from the prior art presented, the invention is based on the object of further developing a power tool, in particular a drill/driver, according to the preamble of claim 1 in such a way that its construction is simplified by reducing the number of adjustment elements and at the same time the operator is able to operate it in a relatively simple manner . This task is achieved with a power tool, in particular a drill/driver, with the features of claim 1. The invention is based on the idea of actuating the two adjusting devices for the respective operating modes via a common actuating element. In other words, this means that two adjusting devices can be actuated in different operating modes by means of a single actuating element. As a result, compared to the prior art, a simplified structure is made possible by a reduced number of components. At the same time, the operation of the two adjustment devices is simplified. The invention also has the advantage that the savings in operating elements make it possible to have a particularly compact design of the power tool, since only one installation space is required for a single actuating element.

Vorteilhafte Weiterbildungen des erfindungsgemäßen Elektrowerkzeugs sind in den Unteransprüchen angegeben.Advantageous developments of the power tool according to the invention are specified in the dependent claims.

In einer konstruktiven Umsetzung der Erfindung, die eine hohe Robustheit des Elektrowerkzeugs, insbesondere des Betätigungselements, ermöglicht wird vorgeschlagen, dass das Betätigungselement als mechanisches Betätigungselement in Form eines Schiebe- oder Drehschalters ausgebildet ist.In a constructive implementation of the invention, which enables a high degree of robustness of the power tool, in particular of the actuating element, it is proposed that the actuating element be designed as a mechanical actuating element in the form of a slide or rotary switch.

Um einerseits eine eindeutige Zuordnung bei der Betätigung des Betätigungselements zu den einzelnen Verstelleinrichtungen zu ermöglichen, die darüber hinaus durch einen Bediener einfach zu verstehen ist, wird darüber hinaus vorgeschlagen, dass das Betätigungselement einen ersten Verstellbereich aufweist, in der das Betätigungselement ausschließlich mit der ersten Verstelleinrichtung zusammenwirkt, und mit einem sich an dem ersten Verstellbereich anschließenden zweiten Verstellbereich, in der das Betätigungselement ausschließlich mit der zweiten Verstelleinrichtung zusammenwirkt.On the one hand, in order to enable a clear assignment when actuating the actuating element to the individual adjustment devices, which is also easy for an operator to understand, it is also proposed that the actuating element have a first adjustment range in which the actuating element can only be used with the first adjustment device interacts, and with a second adjustment area adjoining the first adjustment area, in which the actuating element interacts exclusively with the second adjustment device.

Um eine einfache und stufenlose Erkennung der Position des Betätigungselements für die erste Verstelleinrichtung zu ermöglichen, wird es in einer bevorzugten Ausführungsform der Erfindung vorgeschlagen, dass die erste Verstelleinrichtung zur Drehmomenteinstellung ein Potentiometer zur Erkennung der Position des Betätigungselements umfasst, dessen Widerstandswert mittels eines am Betätigungselement angeordneten, als Überbrückung zwischen Leiterbahnen wirkenden Kontaktelements veränderbar ist.In order to enable a simple and stepless detection of the position of the actuating element for the first adjusting device, it is proposed in a preferred embodiment of the invention that the first adjusting device for torque setting has a potentiometer for detecting the position of the actuating element, the resistance value of which can be changed by means of a contact element which is arranged on the actuating element and acts as a bridge between conductor tracks.

Bevorzugt ist weiterhin eine Ausführungsform, bei der die Stellung des Betätigungselements mittels einer optischen Anzeige dargestellt ist. Eine derartige optische Anzeige ist von einem Bediener relativ leicht erfassbar und ermöglicht somit eine besonders genaue Einstellung der gewünschten Schaltstellung des Betätigungselements.Also preferred is an embodiment in which the position of the actuating element is shown by means of an optical display. Such an optical display can be detected relatively easily by an operator and thus enables the desired switching position of the actuating element to be set particularly precisely.

Besonders bevorzugt ist es hierbei, wenn die optische Anzeige im Bereich des Verstellwegs eines Bedienelements des Betätigungselements angeordnet ist.It is particularly preferred here if the visual display is arranged in the area of the adjustment path of a control element of the actuating element.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnungen.Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawings.

Diese zeigen in:

Fig. 1
eine perspektivische Ansicht auf ein erfindungsgemäßes Elektrowerkzeug in Form eines Bohrschraubers,
Fig. 2
eine perspektivische Teilansicht auf den Bohrschrauber gemäß Fig. 1 im Bereich dessen Betätigungselements,
Fig. 3 und Fig. 4
eine perspektivische, teilweise geschnittene Ansicht des Elektrowerkzeugs im Bereich der ersten Verstelleinrichtung aus unterschiedlichen Perspektiven,
Fig. 5
einen Längsschnitt durch das Elektrowerkzeug im Bereich der Verstelleinrichtungen,
Fig. 6
eine perspektivische Ansicht eines Teils des als Verstellring ausgebildeten Betätigungselements,
Fig. 7
Einzelteile der zweiten Verstelleinrichtung in perspektivischer Ansicht,
Fig. 8 und Fig. 9
die zweite Verstelleinrichtung in moniertem Zustand in unterschiedlichen Betriebsstellungen und
Fig. 10
das Elektrowerkzeug im Bereich des Betätigungselements in der Bohrstellung des Betätigungselements in perspektivischer Ansicht.
These show in:
1
a perspective view of a power tool according to the invention in the form of a drill driver,
2
a perspective partial view of the drill according to 1 in the area of its actuating element,
3 and 4
a perspective, partially sectioned view of the power tool in the area of the first adjustment device from different perspectives,
figure 5
a longitudinal section through the power tool in the area of the adjustment devices,
6
a perspective view of part of the actuating element designed as an adjusting ring,
7
Individual parts of the second adjustment device in a perspective view,
8 and 9
the second adjusting device in mounted condition in different operating positions and
10
the power tool in the area of the actuating element in the drilling position of the actuating element in a perspective view.

In den Figuren sind gleiche Bauteile bzw. Bauteile mit gleicher Funktion mit jeweils identischen Bezugsziffern versehen.In the figures, the same components or components with the same function are each provided with identical reference numbers.

In der Fig. 1 ist ein erfindungsgemäßes Elektrowerkzeug 10 in Form eines akkubetriebenen Bohrschraubers 1 dargestellt. Das Elektrowerkzeug 10 weist in an sich bekannter Art und Weise einen Antriebsmotor 11 auf, der über ein Getriebe 12 auf eine Antriebsspindel 13 wirkt. Ferner weist das Getriebe 12 des Elektrowerkzeugs 10 wenigstens zwei Getriebestufen (nicht dargestellt) auf, wovon die erste Getriebestufe, welche eine höhere Untersetzung aufweist als die zweite Getriebestufe, zum Schrauben Verwendung findet, während die zweite Getriebestufe zum Bohren geeignet ist. Wesentlich ist noch, dass für die Schraubfunktion das maximal zu übertragende Drehmoment des Antriebsmotors 11 auf die Antriebsspindel 13 einstellbar ist.In the 1 a power tool 10 according to the invention in the form of a battery-operated drill driver 1 is shown. The power tool 10 has, in a manner known per se, a drive motor 11 which acts on a drive spindle 13 via a gear 12 . Furthermore, the transmission 12 of the power tool 10 has at least two gear stages (not shown), of which the first gear stage, which has a higher reduction than the second gear stage, is used for screwdriving, while the second gear stage is suitable for drilling. It is also important that the maximum torque to be transmitted from the drive motor 11 to the drive spindle 13 can be set for the screwing function.

Erfindungsgemäß ist es vorgesehen, dass sowohl die Einstellung des zu übertragenden, maximalen Drehmoments während des Schraubbetriebs, als auch der Gangwechsel, der zum Umstellen vom Schraub- in den Bohrbetrieb erforderlich ist, mittels eines einzigen Betätigungselements 15 erfolgt. Das Betätigungselement 15 ist hierbei im dargestellten Ausführungsbeispiel als ein als Drehring 16 ausgebildeter Schiebeschalter realisiert. Ergänzend wird erwähnt, dass das Betätigungselement 15 anstelle als Drehring 16 auch als Drehschalter ausgebildet sein könnte.According to the invention, it is provided that both the setting of the maximum torque to be transmitted during the screwing operation and the gear change, which is required for switching from screwing to drilling operation, take place by means of a single actuating element 15 . The actuating element 15 is implemented as a slide switch designed as a rotary ring 16 in the exemplary embodiment shown. In addition, it is mentioned that the actuating element 15 could also be designed as a rotary switch instead of as a rotating ring 16 .

Der Drehring 16 ist im Gehäuse des Bohrschraubers 1 innerhalb eines bestimmten Drehwinkelbereichs verstellbar. Hierzu dient ein von außen vom Bediener betätigbares Bedienelement 17, das innerhalb des Verstellbereichs bzw. des Drehwinkelbereichs des Drehrings 16 vorzugsweise stufenlos verstellbar ist. Die jeweilige Stellung des Bedienelements 17 bzw. des Drehrings 16 wird über eine optische Anzeige 18 angezeigt. Dabei umfasst die optische Anzeige 18 zwei voneinander getrennt angeordnete Anzeigefelder 19, 20, in denen insbesondere eine Vielzahl von LEDs angeordnet sind. Wesentlich hierbei ist, dass in dem einen Anzeigefeld 19 sich das Betätigungselement 15 im angesprochenen ersten Betriebsmodus befindet, in der der Bohrschrauber 1 einen Schraubbetrieb ermöglicht, während das zweite Anzeigefeld 20 zur Anzeige des Bohrbetriebs dient. Die Anordnung der Anzeigefelder 19, 20 ist derart, dass die jeweils leuchtenden LEDs mit der Stellung des Bedienelements 17 korrelieren bzw. ausgerichtet sind.The rotary ring 16 can be adjusted in the housing of the drill/screwdriver 1 within a specific rotary angle range. A control element 17 that can be actuated from the outside by the operator and that is within the adjustment range or the rotation angle range is used for this purpose of the rotary ring 16 is preferably continuously adjustable. The respective position of the operating element 17 or the rotating ring 16 is displayed via a visual display 18 . In this case, the optical display 18 comprises two display fields 19, 20 which are arranged separately from one another and in which, in particular, a large number of LEDs are arranged. It is essential here that in one display field 19 the actuating element 15 is in the first operating mode mentioned, in which the drill driver 1 enables screwing operation, while the second display field 20 is used to display the drilling operation. The display panels 19, 20 are arranged in such a way that the LEDs that are lit in each case correlate with the position of the operating element 17 or are aligned.

Wie insbesondere aus den Fig. 3 und 4 erkennbar ist, weist der Drehring 16 an seiner einen Stirnseite ein elektrisch wirkendes Kontaktelement 22 auf, das an dem Drehring 16 in einer vorzugsweise angespritzten Aussparung formschlüssig aufgenommen ist. Das Kontaktelement 22 ist Bestandteil eines Potentiometers 25, das an einer bogenförmigen Schaltplatine 26 ausgebildet ist. Die Schaltplatine 26 ist wiederum mit einem Schaltungsträger 27 verbunden, auf dem Auswertemittel 28 angeordnet sind, die dazu geeignet sind, die Stellung des Kontaktelements 22 relativ zur Schaltplatine 26 zu erfassen. Hierzu weist die Schaltplatine 26 zwei Leiterbahnen 29, 30 auf, die beabstandet zueinander angeordnet sind und mittels des Kontaktelements 22 elektrisch überbrückt werden. Die Stellung bzw. Position des Kontaktelements 22, und somit die Drehwinkelposition des Drehrings 16, wird dadurch erfasst, dass entsprechend der Position des Drehrings 16 das Kontaktelement 22 ebenfalls eine der Position des Drehrings 16 zugeordnete eindeutige Position einnimmt. Dabei überbrückt das Kontaktelement 22 die beiden Leiterbahnen 29, 30 an der Schaltplatine 26, so dass das Potentiometer 25 einen ganz bestimmten Widerstandswert erzeugt, der mittels der Auswertemittel 28 erfasst wird. Dieser erfasste Wert der Drehwinkelstellung des Drehrings 16 wird von den Auswertemitteln 28 an eine in den Figuren nicht dargestellte Steuereinrichtung des Elektrowerkzeugs 10 als Eingangswert zugeführt, welche aufgrund der Position des Drehrings 16, sowie ggf. anhand anderer zusätzlicher Eingangsgrößen, das maximal zu übertragene Drehmoment des Antriebsmotors 1 durch eine Begrenzung des Stromes des Antriebsmotors 11 einstellt.As in particular from the 3 and 4 As can be seen, the rotating ring 16 has an electrically acting contact element 22 on its one end face, which is received in a form-fitting manner on the rotating ring 16 in a preferably injection-molded recess. The contact element 22 is part of a potentiometer 25 which is formed on a circuit board 26 in the form of an arc. The circuit board 26 is in turn connected to a circuit carrier 27 on which evaluation means 28 are arranged, which are suitable for detecting the position of the contact element 22 relative to the circuit board 26 . For this purpose, the circuit board 26 has two conductor tracks 29, 30 which are arranged at a distance from one another and are electrically bridged by means of the contact element 22. The setting or position of the contact element 22, and thus the angular position of the rotating ring 16, is detected in that, corresponding to the position of the rotating ring 16, the contact element 22 also assumes a unique position associated with the position of the rotating ring 16. In this case, the contact element 22 bridges the two conductor tracks 29, 30 on the circuit board 26, so that the potentiometer 25 generates a very specific resistance value, which is detected by the evaluation means 28. This detected value of the rotary angle position of rotary ring 16 is sent by evaluation means 28 as an input value to a control device (not shown in the figures) of power tool 10, which, based on the position of rotary ring 16 and possibly other additional input variables, determines the maximum torque to be transmitted of the Drive motor 1 by limiting the current of the drive motor 11 sets.

In der Fig. 6 erkennt man die dem Kontaktelement 22 gegenüberliegende Stirnseite des Drehrings 16. Hierbei sind Rastnocken 31 am Drehring 16 angeformt, die bei einer Drehung des Drehrings 16 mit entsprechenden Gegenmitteln zum Beispiel im Gehäuse zusammenwirken und beim Bediener einerseits ein haptisch fühlbares Einrasten beim Drehen des Drehrings 16 erzeugen und zum anderen ein entsprechendes Geräusch, welches vom Bediener wahrgenommen werden kann.In the 6 one can see the end face of the rotary ring 16 opposite the contact element 22. Here, latching cams 31 are formed on the rotary ring 16, which interact with corresponding counter-means, for example in the housing, when the rotary ring 16 is rotated and on the one hand generate a haptically perceptible latching by the operator when turning the rotary ring 16 and on the other hand a corresponding noise which can be perceived by the operator.

Darüber hinaus erkennt man, dass an dem Drehring 16 ein Verstellelement in Form eines Verstellzapfens 33 angeformt ist. Der Verstellzapfen 33 ist Bestandteil eines Gangvorwahlschalters 34, der entsprechend den Fig. 7 bis 9 ein ortsfest im Elektrowerkzeug 10 angeordnetes Führungsgehäuse 35 umfasst, in dem eine entsprechend des Doppelpfeils 36 senkrecht zur Drehrichtung des Drehrings 16, dessen Drehrichtung durch den Doppelpfeil 32 bezeichnet ist, gleitend angeordnete Übertragungsplatte 37 angeordnet ist. In der Übertragungsplatte 37 ist eine Führungsnut 38 für den Verstellzapfen 33 ausgebildet, welche an ihrem einen Ende 39 offen ausgebildet ist. Die Übertragungsplatte 37 weist an ihrer Oberseite einen Rastnocken 40 auf, der mit zwei, an dem Führungsgehäuse 35 einstückig angeformten Rastbügeln 44, 45 zusammenwirkt. Dabei nimmt der Rastnocken 40 entsprechend der Position in der Übertragungsplatte 37 zwei, in den Fig. 8 und 9 dargestellte Positionen ein, in der die Übertragungsplatte 37 mittels eines mit der Übertragungsplatte 37 gekoppelten Schalthebels 41 das Getriebe 12 des Elektrowerkzeugs 10 entweder in dem ersten Gang, welcher zum Schrauben vorgesehen ist, oder in dem zweiten Gang, welcher zum Bohren geeignet ist, einstellt. Dabei ist die Verstellung zwischen den beiden Positionen, das heißt das jeweilige Überwinden der Rastbügel 44, 45 durch den Rastnocken 40, vom Bediener sowohl haptisch als auch akustisch wahrnehmbar.In addition, it can be seen that an adjustment element in the form of an adjustment pin 33 is integrally formed on the rotating ring 16 . The adjusting pin 33 is part of a gear selector switch 34, which corresponds to the Figures 7 to 9 a stationary guide housing 35 arranged in the power tool 10, in which a transmission plate 37 arranged to slide according to the double arrow 36 perpendicular to the direction of rotation of the rotating ring 16, whose direction of rotation is indicated by the double arrow 32, is arranged. A guide groove 38 for the adjustment pin 33 is formed in the transmission plate 37 and is open at one end 39 . The transmission plate 37 has on its upper side a latching cam 40 which interacts with two latching brackets 44 , 45 integrally formed on the guide housing 35 . The locking cam 40 takes according to the position in the transmission plate 37 two, in the Figures 8 and 9 positions shown, in which the transmission plate 37, by means of a shift lever 41 coupled to the transmission plate 37, sets the transmission 12 of the power tool 10 either in first gear, which is intended for screwdriving, or in second gear, which is suitable for drilling. The adjustment between the two positions, ie the respective overcoming of the latching brackets 44, 45 by the latching cam 40, can be perceived by the operator both haptically and acoustically.

Die Funktionsweise des Gangvorwahlschalters 34 ist wie folgt: in der Position des Drehrings 16, in der sich das Kontaktelement 22 im Bereich der Leiterbahnen 29, 30 des Potentiometers 25 befindet, welches gleichbedeutend mit einem ersten Verstellbereich 42 (Fig. 2) des Drehrings 16 für den Schraubmodus ist, befindet sich der Verstellzapfen 33 außer Eingriff mit der Führungsnut 38 der Übertragungsplatte 37. Das bedeutet, dass der Schalthebel 41 eine Position einnimmt, in der das Getriebe 12 des Elektrowerkzeugs 10 sich im ersten Gang befindet. Bei einer Drehung des Drehrings 16 über den Bereich des Potentiometers 25 hinaus, welches gleichbedeutend mit einem zweiten Verstellbereich 43 ist, gelangt der Verstellzapfen 33 in Eingriff mit der Führungsnut 38 der Übertragungsplatte 37. Hierbei ist die Bewegungsrichtung des Verstellzapfens 33 in der Fig. 7 wie die Bewegungsrichtung des Drehrings 16 durch den Doppelpfeil 32 bezeichnet. Sobald der Verstellzapfen 33 in Eingriff mit der Führungsnut 38 der Übertragungsplatte 37 ist, wird diese aus dem Führungsgehäuse 35 heraus bewegt, so dass der Rastnocken 40 und der mit der Übertragungsplatte 37 gekoppelte Schalthebel 41 ihre in der Fig. 9 dargestellte zweite Position einnehmen, bei der die Übertragungsplatte 37 über den Schalthebel 41 das Getriebe 12 des Elektrowerkzeugs 10 in den zweiten Gang schaltet. Dadurch wird die Drehzahl erhöht, so dass das Elektrowerkzeug 10 im Bohrbetriebmodus ist. Bei einer Bewegung des Verstellrings 16 aus dem zweiten Verstellbereich 43 zurück in den ersten Verstellbereich 42 erfolgt wiederum eine Verstellung des Getriebes 12 vom zweiten Gang in den ersten Gang durch den Schalthebel 41.The mode of operation of the gear selector switch 34 is as follows: in the position of the rotary ring 16 in which the contact element 22 is in the area of the conductor tracks 29, 30 of the potentiometer 25, which is equivalent to a first adjustment range 42 ( 2 ) of the rotary ring 16 for the screwing mode, the adjusting pin 33 is disengaged from the guide groove 38 of the transmission plate 37. This means that the shift lever 41 assumes a position in which the gear 12 of the power tool 10 is in first gear. Upon rotation of the rotary ring 16 over the range of the potentiometer 25 addition, which is equivalent to a second adjustment range 43, the adjustment pin 33 engages with the guide groove 38 of the transmission plate 37. Here is the direction of movement of the adjustment pin 33 in the 7 as the direction of movement of the rotating ring 16 is indicated by the double arrow 32 . As soon as the adjusting pin 33 is in engagement with the guide groove 38 of the transmission plate 37, it is moved out of the guide housing 35, so that the locking cam 40 and the shift lever 41 coupled to the transmission plate 37 are in the 9 assume the second position shown, in which the transmission plate 37 switches the transmission 12 of the power tool 10 to the second gear via the shift lever 41 . This increases the speed, so that the power tool 10 is in drilling mode. When the adjustment ring 16 moves from the second adjustment range 43 back into the first adjustment range 42, the transmission 12 is in turn shifted from the second gear to the first gear by the shift lever 41.

Das soweit beschriebene Elektrowerkzeug 10 kann in vielfältiger Art und Weise abgewandelt bzw. modifiziert werden, ohne den in den Ansprüchen definierten Schutzumfang der Erfindung zu verlassen.The power tool 10 described so far can be altered or modified in many ways without departing from the protective scope of the invention defined in the claims.

Claims (9)

  1. Electric power tool (10), in particular drill driver (1), comprising a drive motor (11) which is coupled to an output element (13), in particular to a drive spindle, via a transmission (12) having a plurality of transmission gear ratios, wherein the torque generated by the drive motor (11) can be set by means of a first adjusting device (25) which can be actuated manually, and by means of a second adjusting device (34) which can be actuated manually, in particular for the purpose of setting the transmission gear ratio of the transmission (12), wherein both adjusting devices (25, 34) can be actuated via a common actuating element (15), characterized in that the first adjusting device comprises, for the purpose of torque setting, a potentiometer (25) for identifying the position of the actuating element (15), the resistance value of which potentiometer can be varied by means of a contact element (22) which is arranged on the actuating element (15) and which acts as a bridge between conductor tracks (29, 30).
  2. Electric power tool according to Claim 1,
    characterized
    in that the actuating element (15) is configured as a mechanical actuating element (15) in the form of a sliding switch (16) or rotary switch.
  3. Electric power tool according to Claim 2,
    characterized
    in that the actuating element (15) has a first adjustment range (42), in which the actuating element (15) cooperates exclusively with the first adjusting device (25), and has a second adjustment range (43), which adjoins the first adjustment range (42) and in which the actuating element (15) cooperates exclusively with the second adjusting device (34).
  4. Electric power tool according to one of Claims 1 to 3,
    characterized
    in that the potentiometer (25) is arranged on a circuit carrier (27), in that the circuit carrier (27) has evaluating means (28) for identifying the position of the actuating element (15) on the basis of the resistance value of the potentiometer (25), and in that the circuit carrier (27) is connected to a control device for controlling the drive motor (11) with respect to the transmittable torque thereof.
  5. Electric power tool according to Claim 3 or 4,
    characterized
    in that an adjusting element (33) is arranged on the actuating element (15), said adjusting element cooperating with a gear adjusting element (37) in the second adjustment range (43) of the actuating element (15).
  6. Electric power tool according to Claim 5,
    characterized
    in that the adjusting element cooperates with a gear preselector switch (34) and is configured as an adjusting pin (33), in that the gear adjusting element is configured as a sliding switch (37), and in that the sliding switch (37) has a cutout in the form of a guide slot (38), with which the adjusting pin (33) comes into operative connection at the start of the second adjustment range (43) of the actuating element (15).
  7. Electric power tool according to Claim 6,
    characterized
    in that the sliding switch (37) is coupled to a shift lever (41) which, in the case of a particular position of the adjusting pin (33) in the guide slot (38), shifts the transmission (12) from a first gear to a second gear.
  8. Electric power tool according to one of Claims 1 to 7,
    characterized
    in that the position of the actuating element (15) is represented by means of an optical indicator (18) .
  9. Electric power tool according to Claim 8,
    characterized
    in that the optical indicator (18) is arranged in the region of the adjustment path of an operator control element (17) of the actuating element (15).
EP18197884.2A 2010-05-25 2011-04-15 Electric tool, in particular drill driver Active EP3581332B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010029267A DE102010029267A1 (en) 2010-05-25 2010-05-25 Power tool, in particular drill driver
EP11715503.6A EP2576144B1 (en) 2010-05-25 2011-04-15 Electric power tool, in particular screwdriver
PCT/EP2011/056029 WO2011147641A1 (en) 2010-05-25 2011-04-15 Electric power tool, in particular screw driller

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP11715503.6A Division EP2576144B1 (en) 2010-05-25 2011-04-15 Electric power tool, in particular screwdriver
EP11715503.6A Division-Into EP2576144B1 (en) 2010-05-25 2011-04-15 Electric power tool, in particular screwdriver

Publications (2)

Publication Number Publication Date
EP3581332A1 EP3581332A1 (en) 2019-12-18
EP3581332B1 true EP3581332B1 (en) 2023-03-01

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EP11715503.6A Active EP2576144B1 (en) 2010-05-25 2011-04-15 Electric power tool, in particular screwdriver
EP18197884.2A Active EP3581332B1 (en) 2010-05-25 2011-04-15 Electric tool, in particular drill driver

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US (1) US9687977B2 (en)
EP (2) EP2576144B1 (en)
CN (2) CN102892555B (en)
DE (1) DE102010029267A1 (en)
WO (1) WO2011147641A1 (en)

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Also Published As

Publication number Publication date
EP3581332A1 (en) 2019-12-18
US9687977B2 (en) 2017-06-27
DE102010029267A1 (en) 2011-12-01
WO2011147641A1 (en) 2011-12-01
US20130206435A1 (en) 2013-08-15
CN102892555B (en) 2016-03-30
CN105345751A (en) 2016-02-24
CN102892555A (en) 2013-01-23
EP2576144A1 (en) 2013-04-10
EP2576144B1 (en) 2018-12-12
CN105345751B (en) 2018-06-19

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