EP1319477A1 - Electrical hand tool with axial percussion - Google Patents

Electrical hand tool with axial percussion Download PDF

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Publication number
EP1319477A1
EP1319477A1 EP02406048A EP02406048A EP1319477A1 EP 1319477 A1 EP1319477 A1 EP 1319477A1 EP 02406048 A EP02406048 A EP 02406048A EP 02406048 A EP02406048 A EP 02406048A EP 1319477 A1 EP1319477 A1 EP 1319477A1
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EP
European Patent Office
Prior art keywords
handle
hand tool
electric hand
tool device
force sensor
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Granted
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EP02406048A
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German (de)
French (fr)
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EP1319477B1 (en
Inventor
Hans Böni
Orestis Voulkidis
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Hilti AG
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Hilti AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/003—Crossed drill and motor spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/221—Sensors

Definitions

  • the invention describes an at least partially axially striking Electric hand tool device such as a drill bit or chisel device for dismantling Rock.
  • Performance parameters for the mining performance are in particular Impact strength, impact frequency and optionally the speed of the impact tool.
  • control functions of the electric hand tool device are in the Guide handle or arranged in the auxiliary handle.
  • the grinderless potentiometer in the actuator between the pressure plate and the sensor compressible medium arranged in the form of a fluid for pressure transmission.
  • US4250434 is an electro-pneumatic sensor used to control a machine designed as an elastic pressure hose.
  • DE19703746 is on the rear Handle shell on the handle of an electric hand tool device a damping element arranged.
  • a fluid-padded handle has a pressure sensor on which to control the pump to generate the vibration damping filling pressure serves.
  • the axial impact energy is one with an actuator on the housing Infinitely adjustable hammer drill.
  • DE4231986 there is a mechanical Control of the coupling of the hammer mechanism of a rotary hammer via the contact pressure of the Electric hand tool device to the workpiece. The necessary to each other reduce moving parts sliding in the rough environment of the Construction industry, for example, by registered dust, the reliability of the Electric power tool.
  • the object of the invention is a sliding movement-free implementation for intuitive Control of the performance parameters, especially the axial impact energy, one at least partially axially striking electric hand tool device.
  • Another aspect consists in reducing the vibrations transmitted to the user's hand.
  • an at least partially axially striking electric hand tool device a handle and an electronic control means for at least one performance parameter on which is from a flat force sensor, which is between two, at least partially transversely arranged to the flapping axis, assigned to each other pressing surfaces and the contact pressure exerted by the user on the handle in the direction of the workpiece is recorded without sliding movement, is controllable.
  • the flat force sensor is advantageously designed as an electropneumatic sensor, which is a hollow pneumatic between a pressure surface and the force sensor element Has power transmission link, which is very simple, sensitive and robust.
  • the force transmission member with an easily deformable or fluid is advantageous Pressure transmission medium filled, for example a pneumatic oil, a gel or a high viscoelastic solid, which is free of evaporation and not freely flowable.
  • the hollow pneumatic force transmission element is advantageous as a cushion or hose formed, the cross sections of which are compressed by the contact pressure and thereby be deformed such that the hydrostatic pressure of the pressure transmission medium increases.
  • the flat force sensor at the front in the electric hand tool device is advantageous below the axial one Storage of the tool holder, for example, the spindle ball bearing arranged, whereby the total contact pressure is measured.
  • the power transmission member is advantageously extended to the handle, which makes the measurement the total contact pressure on the force sensor element in the handle is possible.
  • the press surfaces are advantageous with regard to the flow of force between the striking mechanism and arranged the grip surface of the handle, further advantageously on the tool-side axial Fixing the striking mechanism to the outer housing shell with the handle or on the Modular definition of the drive module for the handle module with the handle.
  • the force transmission member is advantageously flat and transverse to the axis of impact further advantageous between the handle and a vibration-dampened handle shell arranged, which dampens vibrations within the pressure transmission medium and are therefore only transferred to the hand of the user to a reduced extent.
  • the side handle with such a force transmission element is also advantageous Formation of a flat force sensor designed which with another Force sensor element provided and electrically via signal lines with the Force sensor element of the handle is connected, which in total the contact forces both the handle and the side handle can be used for control.
  • the force transmission element of the side handle is advantageous directly via a Pneumatic connection hose with the power transmission element of the handle connected, whereby a common force sensor element is sufficient and none in the live part of the front part of the hand tool device are necessary, thereby avoiding security problems in this regard.
  • the flat force sensor via a low-pass filter with a cutoff frequency is advantageous less than 30 Hz connected to the control means, which the low-frequency control signals filtered out and suppressed the higher-frequency vibrations.
  • FIG. 1 shows an axially striking electric hand tool device 1 with one Striking mechanism 2 driving electric motor 3 a handle 4 and a Phase angle control trained electronic control means 5, which with a flat force sensor 6 arranged perpendicular to the flapping axis A, which detects the User exerted contact force F on the handle 4 in the direction of the workpiece is recorded without sliding movement, is controllably connected.
  • the force sensor 6 is located without sliding movement between two mutually associated pressing surfaces 7a, 7b, which are arrange between the striking mechanism 2 and the grip surface 8 of the handle 4. schematically the advantageous pressing surfaces 7a, 7b and.
  • Force sensor 6 each at I on the axial fixation of the striking mechanism 2 on the tool side to the outer housing shell 9 the handle 4, at II on the modular definition of the drive module 10 to the handle module 11 with the handle 4 (force sensor 6 "') and at III between the handle 4 and one arranged by the flat force sensor 6 vibration-dampened handle 12.
  • On Force sensor 6 'in the side handle 13 is direct via the connecting hose 14 pneumatically connected to the handle 4.
  • the annular force sensor 6 is at the front in the electric hand tool device 1 in the area of the axial mounting of a tool holder 20 arranged in the spindle ball bearing 21 and with the connecting hose 14 to Handle 4 extended, or connected to the sensor 6.
  • the force sensor 6 is in the exit
  • a low-pass filter 19 is connected downstream of the control means 5 (FIG. 1).
  • the flat force sensor 6 is designed as an electropneumatic sensor, which is a hollow between a pressure surface 15 and the force sensor element 16 has pneumatic power transmission member 17, which with an easily deformable Pressure transmission medium 18 is filled and formed as a flat hose is.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

The power sensor (6'') has hydraulic fluid between two plates (7a,7b) connected by tubing (14) to cushion elements (6,6',6''') in the hand held grip parts (8,13) of the tool.

Description

Die Erfindung bezeichnet ein zumindest teilweise axial schlagendes Elektrohandwerkzeuggerät wie ein Bohrmeisselgerät oder Meisselgerät zum Abbau von Gestein.The invention describes an at least partially axially striking Electric hand tool device such as a drill bit or chisel device for dismantling Rock.

Bei derartigen schlagenden Elektrohandwerkzeuggeräten wird die in einem Schlagwerk erzeugte, axiale Schlagenergie über das Schlagwerkzeug zur Bearbeitung eines Werkstücks verwendet, wobei ein Teil dieser Energie über den Handgriff auf den Nutzer zurückwirkt und in der Hand störende Vibrationen verursacht.With such striking electric hand tool devices, it is in a striking mechanism generated axial impact energy via the impact tool for machining a workpiece used, with some of this energy acting back on the handle on the user and causes disturbing vibrations in the hand.

Mit einer höheren Anpresskraft am Handgriff ist bei axial schlagenden Handwerkzeuggeräten der intuitive Wunsch nach einer höheren Abbauleistung verbunden, im Gegensatz zu rein drehenden Handwerkzeuggeräten, welche teilweise bei hoher Anpresskraft extra langsam drehen sollen. Leistungsparameter für die Abbauleistung sind insbesondere die Schlagstärke, Schlagfrequenz und optional die Drehzahl des Schlagwerkzeuges.With a higher contact pressure on the handle is for axially striking hand tools the intuitive desire for higher mining performance combined as opposed to pure rotating hand tools, which are sometimes extra slow with high contact pressure should turn. Performance parameters for the mining performance are in particular Impact strength, impact frequency and optionally the speed of the impact tool.

Nach der DE19649468 sind Steuerfunktionen des Elektrohandwerkzeuggerätes im Führungshandgriff oder im Hilfshandgriff angeordnet. Nach der DE3843960 wird die Steuerelektronik eines Elektrohandwerkzeuggerätes über ein schleiferloses Potentiometer mit einem Druckpolster gesteuert. Nach der DE19510365 ist bei einem derartigen schleiferlosen Potentiometer im Stellglied zwischen der Druckplatte und dem Sensor ein komprimierbares Medium in Form eines Fluids zur Druckübertragung angeordnet. Nach der US4250434 ist ein, zur Steuerung einer Maschine dienender, elektropneumatischer Sensor als elastischer Druckschlauch ausgebildet. Nach der DE19703746 ist an der hinteren Griffschale am Handgriff eines Elektrohandwerkzeuggerätes ein Dämpfungselement angeordnet. Nach der US5987705 weist ein fluidgepolsterter Handgriff einen Drucksensor auf, welcher zur Regelung der Pumpe zur Erzeugung des vibrationsdämpfenden Fülldrucks dient.According to DE19649468 control functions of the electric hand tool device are in the Guide handle or arranged in the auxiliary handle. According to DE3843960 the Control electronics of an electric hand tool device via a grinderless potentiometer controlled with a pressure pad. According to DE19510365 is one of such grinderless potentiometer in the actuator between the pressure plate and the sensor compressible medium arranged in the form of a fluid for pressure transmission. After US4250434 is an electro-pneumatic sensor used to control a machine designed as an elastic pressure hose. According to DE19703746 is on the rear Handle shell on the handle of an electric hand tool device a damping element arranged. According to US5987705, a fluid-padded handle has a pressure sensor on which to control the pump to generate the vibration damping filling pressure serves.

Nach der DE3316013 ist mit einem Stellglied am Gehäuse die axiale Schlagenergie eines Bohrhammers stufenlos einstellbar. Nach der DE4231986 erfolgt eine mechanische Steuerung der Kupplung des Schlagwerks eines Bohrhammers über die Anpresskraft des Elektrohandwerkzeuggerätes an das Werkstück. Die dazu erforderlichen, zueinander beweglich aneinander abgleitenden Teile vermindern im rauhen Umfeld des Bauhauptgewerbes bspw. durch eingetragenen Staub, die Ausfallsicherheit des Elektrohandwerkzeuggerätes.According to DE3316013, the axial impact energy is one with an actuator on the housing Infinitely adjustable hammer drill. According to DE4231986 there is a mechanical Control of the coupling of the hammer mechanism of a rotary hammer via the contact pressure of the Electric hand tool device to the workpiece. The necessary to each other reduce moving parts sliding in the rough environment of the Construction industry, for example, by registered dust, the reliability of the Electric power tool.

Die Aufgabe der Erfindung besteht in einer gleitbewegungsfreien Realisierung zur intuitiven Steuerung der Leistungsparameter, insbesondere der axialen Schlagenergie, eines zumindest teilweise axial schlagenden Elektrohandwerkzeuggerätes. Ein weiterer Aspekt besteht in der Verminderung der auf die Hand des Nutzers übertragenen Vibrationen.The object of the invention is a sliding movement-free implementation for intuitive Control of the performance parameters, especially the axial impact energy, one at least partially axially striking electric hand tool device. Another aspect consists in reducing the vibrations transmitted to the user's hand.

Die Aufgabe wird im wesentlichen durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The task is essentially solved by the features of the independent claims. Advantageous further developments result from the subclaims.

Im wesentlichen weist ein zumindest teilweise axial schlagendes Elektrohandwerkzeuggerät einen Handgriff und für zumindest einen Leistungsparameter ein elektronisches Steuermittel auf, welches von einem flächigen Kraftsensor, der zwischen zwei, zumindest teilweise quer zur Schlagachse angeordneten, einander zugeordneten Pressflächen angeordnet ist und die vom Nutzer auf den Handgriff in Richtung auf das Werkstück ausgeübte Anpresskraft gleitbewegungsfrei erfasst, steuerbar ist.Essentially, an at least partially axially striking electric hand tool device a handle and an electronic control means for at least one performance parameter on which is from a flat force sensor, which is between two, at least partially transversely arranged to the flapping axis, assigned to each other pressing surfaces and the contact pressure exerted by the user on the handle in the direction of the workpiece is recorded without sliding movement, is controllable.

Durch die vom flächigen Kraftsensor zwischen den einander zugeordneten Pressflächen gleitbewegungsfreie Erfassung der Anpresskraft zur elektronischen Steuerung der Leistungsparameter ist diese auch im rauhen Umfeld ausfallsicher.Because of the flat force sensor between the press surfaces assigned to each other Sliding movement-free detection of the contact pressure for electronic control of the Performance parameters, this is fail-safe even in harsh environments.

Vorteilhaft ist der flächige Kraftsensor als ein elektropneumatischer Sensor ausgebildet, welcher zwischen einer Druckfläche und dem Kraftsensorelement ein hohles pneumatisches Kraftübertragungsglied aufweist, wodurch dieser sehr einfach, sensibel und robust ist.The flat force sensor is advantageously designed as an electropneumatic sensor, which is a hollow pneumatic between a pressure surface and the force sensor element Has power transmission link, which is very simple, sensitive and robust.

Vorteilhaft ist das Kraftübertragungsglied mit einem leicht deformierbaren oder fluiden Druckübertragungsmedium gefüllt, bspw. einem Pneumatiköl, einem Gel oder einem hoch viscoelastischen Festkörper, welcher verdunstungsfrei und nicht frei fliessfähig ist.The force transmission member with an easily deformable or fluid is advantageous Pressure transmission medium filled, for example a pneumatic oil, a gel or a high viscoelastic solid, which is free of evaporation and not freely flowable.

Vorteilhaft ist das hohle pneumatische Kraftübertragungsglied als Kissen oder Schlauch ausgebildet, deren Querschnitte durch die Anpresskraft zusammengedrückt und dadurch derart deformiert werden, dass der hydrostatische Druck des Druckübertragungsmediums steigt. The hollow pneumatic force transmission element is advantageous as a cushion or hose formed, the cross sections of which are compressed by the contact pressure and thereby be deformed such that the hydrostatic pressure of the pressure transmission medium increases.

Vorteilhaft ist der flächige Kraftsensor vorne im Elektrohandwerkzeuggerät unter der axialen Lagerung der Werkzeugaufnahme bspw. dem Spindel-Kugellager angeordnet, wodurch die gesamte Anpresskraft gemessen wird.The flat force sensor at the front in the electric hand tool device is advantageous below the axial one Storage of the tool holder, for example, the spindle ball bearing arranged, whereby the total contact pressure is measured.

Vorteilhaft ist das Kraftübertragungsglied bis zum Handgriff verlängert, wodurch die Messung der gesamten Anpresskraft am Kraftsensorelement im Handgriff möglich ist.The power transmission member is advantageously extended to the handle, which makes the measurement the total contact pressure on the force sensor element in the handle is possible.

Vorteilhaft sind die Pressflächen bezüglich des Kraftflusses zwischen dem Schlagwerk und der Grifffläche des Handgriffs angeordnet, weiter vorteilhaft an der werkzeugseitigen axialen Festlegung des Schlagwerks zur äusseren Gehäuseschale mit dem Handgriff oder an der modularen Festlegung des Antriebsmoduls zum Griffmodul mit dem Handgriff.The press surfaces are advantageous with regard to the flow of force between the striking mechanism and arranged the grip surface of the handle, further advantageously on the tool-side axial Fixing the striking mechanism to the outer housing shell with the handle or on the Modular definition of the drive module for the handle module with the handle.

Vorteilhaft ist das Kraftübertragungsglied quer zur Schlagachse flächig ausgebildet und weiter vorteilhaft zwischen dem Handgriff und einer vibrationsgedämpften Griffschale angeordnet, wodurch Vibrationen innerhalb des Druckübertragungsmediums gedämpft und somit nur vermindert auf die Hand des Nutzers übertragen werden.The force transmission member is advantageously flat and transverse to the axis of impact further advantageous between the handle and a vibration-dampened handle shell arranged, which dampens vibrations within the pressure transmission medium and are therefore only transferred to the hand of the user to a reduced extent.

Vorteilhaft ist zusätzlich der Seitenhandgriff mit einem derartigen Kraftübertragungsglied zur Ausbildung eines flächigen Kraftsensors ausgebildet, welches mit einem weiteren Kraftsensorelement versehen und über Signalleitungen elektrisch mit dem Kraftsensorelement des Handgriffs verbunden ist, wodurch in Summe die Anpresskräfte sowohl des Handgriffs als auch des Seitenhandgriffs zur Steuerung benutzt werden.The side handle with such a force transmission element is also advantageous Formation of a flat force sensor designed which with another Force sensor element provided and electrically via signal lines with the Force sensor element of the handle is connected, which in total the contact forces both the handle and the side handle can be used for control.

Alternativ vorteilhaft ist das Kraftübertragungsglied des Seitenhandgriffs direkt über einen Verbindungsschlauch pneumatisch mit dem Kraftübertragungsglied des Handgriffs verbunden, wodurch ein gemeinsames Kraftsensorelement ausreichend ist und keine, in den vorderen Teil des Handwerkzeuggerätes hineinführende, spannungsführenden Leitungen notwendig sind, wodurch diesbezügliche Sicherheitsprobleme vermieden werden.As an alternative, the force transmission element of the side handle is advantageous directly via a Pneumatic connection hose with the power transmission element of the handle connected, whereby a common force sensor element is sufficient and none in the live part of the front part of the hand tool device are necessary, thereby avoiding security problems in this regard.

Vorteilhaft ist der flächige Kraftsensor über einen Tiefpassfilter mit einer Grenzfrequenz kleiner 30 Hz mit dem Steuermittel verbunden, welche die niederfrequenten Steuersignale herausfiltert und die höherfrequenten Vibrationen unterdrückt.The flat force sensor via a low-pass filter with a cutoff frequency is advantageous less than 30 Hz connected to the control means, which the low-frequency control signals filtered out and suppressed the higher-frequency vibrations.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit

  • Fig. 1 als Elektrohandwerkzeuggerät
  • Fig. 2 als Kraftsensor
    • The invention is explained in more detail with respect to an advantageous embodiment
  • Fig. 1 as an electric hand tool device
  • Fig. 2 as a force sensor

    • Nach Fig. 1 weist ein axial schlagendes Elektrohandwerkzeuggerät 1 mit einem ein Schlagwerk 2 antreibenden Elektromotor 3 einen Handgriff 4 und ein als Phasenanschnittssteuerung ausgebildetes elektronisches Steuermittel 5 auf, welches mit einem senkrecht zur Schlagachse A angeordneten, flächigen Kraftsensor 6, der die vom Nutzer in Richtung auf das Werkstück ausgeübte Anpresskraft F auf den Handgriff 4 gleitbewegungsfrei erfasst, steuerbar verbunden ist. Der Kraftsensor 6 befindet sich gleitbewegungsfrei zwischen zwei einander zugeordneten Pressflächen 7a, 7b, welche sich zwischen dem Schlagwerk 2 und der Grifffläche 8 des Handgriffs 4 anordnen. Schematisch dargestellt sind die vorteilhaften Pressflächen 7a, 7b resp. Kraftsensor 6" jeweils bei I an der werkzeugseitigen axialen Festlegung des Schlagwerks 2 zur äusseren Gehäuseschale 9 mit dem Handgriff 4, bei II an der modularen Festlegung des Antriebsmoduls 10 zum Griffmodul 11 mit dem Handgriff 4 (Kraftsensor 6"') und bei III zwischen dem Handgriff 4 und einer durch den flächigen Kraftsensor 6 vibrationsgedämpften Griffschale 12 angeordnet. Ein Kraftsensor 6' im Seitenhandgriff 13 ist über den Verbindungsschlauch 14 direkt pneumatisch mit dem Handgriff 4 verbunden. Der kreisringförmige Kraftsensor 6" ist vorne im Elektrohandwerkzeuggerät 1 im Bereich der axialen Lagerung einer Werkzeugaufnahme 20 im Spindel-Kugellager 21 angeordnet und mit dem Verbindungsschlauch 14 bis zum Handgriff 4 verlängert, bzw. mit dem Sensor 6 verbunden. Dem Kraftsensor 6 ist im Ausgang zum Steuermittel 5 ein Tiefpassfilter 19 nachgeschaltet (Fig. 1).1 shows an axially striking electric hand tool device 1 with one Striking mechanism 2 driving electric motor 3 a handle 4 and a Phase angle control trained electronic control means 5, which with a flat force sensor 6 arranged perpendicular to the flapping axis A, which detects the User exerted contact force F on the handle 4 in the direction of the workpiece is recorded without sliding movement, is controllably connected. The force sensor 6 is located without sliding movement between two mutually associated pressing surfaces 7a, 7b, which are arrange between the striking mechanism 2 and the grip surface 8 of the handle 4. schematically the advantageous pressing surfaces 7a, 7b and. Force sensor 6 "each at I on the axial fixation of the striking mechanism 2 on the tool side to the outer housing shell 9 the handle 4, at II on the modular definition of the drive module 10 to the handle module 11 with the handle 4 (force sensor 6 "') and at III between the handle 4 and one arranged by the flat force sensor 6 vibration-dampened handle 12. On Force sensor 6 'in the side handle 13 is direct via the connecting hose 14 pneumatically connected to the handle 4. The annular force sensor 6 "is at the front in the electric hand tool device 1 in the area of the axial mounting of a tool holder 20 arranged in the spindle ball bearing 21 and with the connecting hose 14 to Handle 4 extended, or connected to the sensor 6. The force sensor 6 is in the exit A low-pass filter 19 is connected downstream of the control means 5 (FIG. 1).

    Nach Fig. 2 ist der flächige Kraftsensor 6 als ein elektropneumatischer Sensor ausgebildet, welcher zwischen einer Druckfläche 15 und dem Kraftsensorelement 16 ein hohles pneumatisches Kraftübertragungsglied 17 aufweist, welches mit einem leicht deformierbaren Druckübertragungsmedium 18 gefüllt ist und als flächig verlaufender Schlauch ausgebildet ist.2, the flat force sensor 6 is designed as an electropneumatic sensor, which is a hollow between a pressure surface 15 and the force sensor element 16 has pneumatic power transmission member 17, which with an easily deformable Pressure transmission medium 18 is filled and formed as a flat hose is.

    Claims (11)

    Elektrohandwerkzeuggerät zur zumindest teilweise axial schlagenden Bearbeitung eines Werkstücks mit einem Schlagwerk (2), mit einem Handgriff (4) und mit einem elektronischen Steuermittel (5) für zumindest einen Leistungsparameter des Elektrohandwerkzeuggerätes, dadurch gekennzeichnet, dass ein flächiger Kraftsensor (6", 6"') zwischen zumindest zwei, zumindest teilweise quer zur Schlagachse (A) orientierten, einander zugeordneten Pressflächen (7a, 7b) zur gleitbewegungsfreien Erfassung der vom Nutzer in Richtung auf das Werkstück ausgeübten Anpresskraft (F, F') angeordnet ist und dass das Steuermittel (5) mit dem Kraftsensor (6", 6"') steuerbar verbunden ist.Electric hand tool device for at least partially axially striking machining of a workpiece with an impact mechanism (2), with a handle (4) and with an electronic control means (5) for at least one performance parameter of the electric hand tool device, characterized in that a flat force sensor (6 ", 6"') between at least two, at least partially transverse to the impact axis (A) oriented, mutually associated pressing surfaces (7a, 7b) for sliding movement-free detection of the contact pressure exerted by the user in the direction of the workpiece (F, F') and that the control means ( 5) is controllably connected to the force sensor (6 ", 6"'). Elektrohandwerkzeuggerät nach Anspruch 1, dadurch gekennzeichnet, dass der flächige Kraftsensor (6) als ein elektropneumatischer Sensor ausgebildet ist, welcher zwischen einer Druckfläche (15) und dem Kraftsensorelement (16) ein hohles pneumatisches Kraftübertragungsglied (17) aufweist.Electric hand tool device according to claim 1, characterized in that the flat force sensor (6) is designed as an electropneumatic sensor which has a hollow pneumatic force transmission member (17) between a pressure surface (15) and the force sensor element (16). Elektrohandwerkzeuggerät nach Anspruch 2, dadurch gekennzeichnet, dass das Kraftübertragungsglied (17) mit einem leicht deformierbaren oder fluiden Druckübertragungsmedium (18) gefüllt ist.Electric hand tool device according to claim 2, characterized in that the force transmission member (17) is filled with an easily deformable or fluid pressure transmission medium (18). Elektrohandwerkzeuggerät nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Kraftübertragungsglied (17) als Kissen oder Schlauch ausgebildet ist.Electric hand tool device according to claim 2 or 3, characterized in that the force transmission member (17) is designed as a cushion or hose. Elektrohandwerkzeuggerät nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass zusätzlich ein Seitenhandgriff (13) mit einem weiteren Kraftübertragungsglied zur Ausbildung eines weiteren flächigen Kraftsensors (6') ausgebildet ist.Electric hand tool device according to one of the preceding claims, characterized in that in addition a side handle (13) is formed with a further force transmission member to form a further flat force sensor (6 '). Elektrohandwerkzeuggerät nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der flächige Kraftsensor (6") vorne im Elektrohandwerkzeuggerät unter der axialen Lagerung einer Werkzeugaufnahme angeordnet ist.Electric hand tool device according to one of the preceding claims, characterized in that the flat force sensor (6 ") is arranged at the front in the electric hand tool device under the axial bearing of a tool holder. Elektrohandwerkzeuggerät nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Kraftübertragungsglied (17) bis zum Handgriff (4) verlängert ist.Electric hand tool device according to one of the preceding claims, characterized in that the force transmission member (17) is extended to the handle (4). Elektrohandwerkzeuggerät nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Pressflächen (7a, 7b) bezüglich des Kraftflusses zwischen dem Schlagwerk (2) und der Grifffläche des Handgriffs (4) angeordnet sind, weiter optional an der werkzeugseitigen axialen Festlegung des Schlagwerks (2) zu einer äusseren Gehäuseschale (9) mit dem Handgriff (4) oder an der modularen Festlegung des Antriebsmoduls (10) zu einem Griffmodul (11) mit dem Handgriff (4).Electric hand tool device according to one of the preceding claims, characterized in that the pressing surfaces (7a, 7b) are arranged with respect to the force flow between the striking mechanism (2) and the gripping surface of the handle (4), further optionally on the tool-side axial fixing of the striking mechanism (2) to an outer housing shell (9) with the handle (4) or on the modular fixing of the drive module (10) to a handle module (11) with the handle (4). Elektrohandwerkzeuggerät nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Pressflächen (7a, 7b) zwischen einem Handgriff (4) und einer vibrationsgedämpften Griffschale (12) angeordnet sind.Electric hand tool device according to one of the preceding claims, characterized in that the pressing surfaces (7a, 7b) are arranged between a handle (4) and a vibration-dampened handle shell (12). Elektrohandwerkzeuggerät nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Kraftübertragungsglied (17) eines Seitenhandgriffs (13) direkt über einen Verbindungsschlauch (14) pneumatisch mit dem Kraftübertragungsglied (17) des Handgriffs (4) verbunden ist.Electric hand tool device according to one of the preceding claims, characterized in that the force transmission member (17) of a side handle (13) is pneumatically connected directly to the force transmission member (17) of the handle (4) via a connecting hose (14). Elektrohandwerkzeuggerät nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der flächige Kraftsensor (6", 6"') über einen Tiefpassfilter (19) mit einer Grenzfrequenz kleiner 30 Hz mit dem Steuermittel (5) verbunden ist.Electric hand tool device according to one of the preceding claims, characterized in that the flat force sensor (6 ", 6"') is connected to the control means (5) via a low-pass filter (19) with a cutoff frequency less than 30 Hz.
    EP02406048A 2001-12-12 2002-12-03 Electrical hand tool with axial percussion Expired - Lifetime EP1319477B1 (en)

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    DE10160864A DE10160864A1 (en) 2001-12-12 2001-12-12 Axial striking electric hand tool device

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    Also Published As

    Publication number Publication date
    CN1298471C (en) 2007-02-07
    CN1424166A (en) 2003-06-18
    EP1319477B1 (en) 2010-04-14
    DE50214358D1 (en) 2010-05-27
    JP2003191178A (en) 2003-07-08
    US20030116333A1 (en) 2003-06-26
    DE10160864A1 (en) 2003-06-26
    US6799643B2 (en) 2004-10-05

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