EP2364818B1 - Handheld power tool - Google Patents

Handheld power tool Download PDF

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Publication number
EP2364818B1
EP2364818B1 EP10155791.6A EP10155791A EP2364818B1 EP 2364818 B1 EP2364818 B1 EP 2364818B1 EP 10155791 A EP10155791 A EP 10155791A EP 2364818 B1 EP2364818 B1 EP 2364818B1
Authority
EP
European Patent Office
Prior art keywords
hand
housing
plane
thumb
contact surface
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.)
Active
Application number
EP10155791.6A
Other languages
German (de)
French (fr)
Other versions
EP2364818A1 (en
Inventor
Valentin Keller
Bastian Roll
Tobias Grieger
Rony Meier
Ross Chen
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.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to EP10155791.6A priority Critical patent/EP2364818B1/en
Priority to JP2011049335A priority patent/JP5822490B2/en
Priority to US13/041,673 priority patent/US8714282B2/en
Publication of EP2364818A1 publication Critical patent/EP2364818A1/en
Application granted granted Critical
Publication of EP2364818B1 publication Critical patent/EP2364818B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the present invention relates to a hand tool, in particular an electric screwdriver, as shown in EP 2 147 754 A1 or DE 102008003111 U1 and the preamble of claim 1.
  • Electric wrenches can be operated with one hand in most applications.
  • a torque to be applied by the user and a contact pressure are typically low.
  • a pistol grip meets these applications and allows a compact and lightweight design.
  • a high contact pressure is required.
  • the user can hold the power wrenches with a second hand on a detachable auxiliary handle, which the user can attach near the tool holder.
  • the hand tool of the invention e.g. An electric screwdriver has a tool holder for holding a tool along an axis.
  • a housing has a grip area for a first hand.
  • the grip portion has a thumb and forefinger rest portion in a plane with the shaft and a shaft portion for grasping on one side of the plane.
  • An abutment surface for a second hand which is remote from the tool holder and disposed on another side of the plane, is inclined between 80 degrees and 100 degrees to the plane.
  • the contact surface allows a user to exert an additional pressure on the tool, for example by the palm of the hand of the second hand pressed against the contact surface.
  • an additional pressure on the tool for example by the palm of the hand of the second hand pressed against the contact surface.
  • the contact surface has a dimension of at least 1.2 cm perpendicular to the plane.
  • the support section for thumb and index finger is arranged in a recess of the housing.
  • Fig. 1 shows an electric screwdriver 10 as an exemplary hand tool in a side view; Fig. 2 in cross-section in the plane II-II.
  • the electric screwdriver 10 has an angled housing 11, in which a motor 12 is coupled by a drive train 13 with a tool holder 14 .
  • the powertrain 13 may include at least one spindle, a transmission, an overload clutch, a tangential impactor, and the like.
  • a power supply of the electric screwdriver 10, in particular of the motor 12, is effected by an accumulator 15, which is detachably fastened to a foot 16 of the housing 11 .
  • the tool holder 14 defines a working axis 17 of the electric screwdriver 10 by aligning a tool 18 along the working axis 17 .
  • the user exerts along the working axis 17 a contact pressure to screw a screw into a workpiece.
  • the housing 11 is substantially mirror-symmetrical to a plane of symmetry 20, in which the working axis 17 extends. A user can equally guide the electric screwdriver 10 with his left hand or right hand.
  • the user can create a remote from the tool holder 14 back 21 of the housing 11 .
  • Thumb and forefinger are on the side of the housing 11 on both sides of the plane of symmetry 20 in a support area 22 at.
  • the support region 22 begins at the rear side 21 of the housing 11 and has two legs 23, which extend in the direction of the tool holder 14 and enclose the housing 11 in a U-shaped manner between them.
  • the legs 23 of the support portion 22 define a guide plane 24, in which also the working axis 17 is located and which is perpendicular to the plane of symmetry 20 .
  • the legs 23 are about as long as a pointer finger.
  • the angled housing 11 has a shaft 25.
  • An inclination 26 of a longitudinal axis 27 of the shaft 25 to the working axis 17 may be between 70 degrees and 90 degrees.
  • the shaft 25 forms together with the support area 22 a handle 28. The leading hand can grip the shaft with the remaining fingers.
  • An operating button 30 which is used to activate the electric screwdriver 10, in particular the motor 12, is provided on a front side 29 of the shaft 25 facing the tool holder 14 . The user can operate the operation button 30 with the remaining fingers.
  • a contact surface 31 is provided for a second hand.
  • the contact surface 31 is arranged on the side opposite the shaft 25 of the guide plane 24 and approximately in extension of the shaft 25.
  • the contact surface 31 is perpendicular or an inclination 32 between 80 degrees and 100 degrees to the working axis 17.
  • the inclination 32 of the contact surface 31 is preferably closer to 90 degrees to the working axis 17 than the inclination 26 of the longitudinal axis 27 of the shaft 25.
  • the height 33, ie dimension perpendicular to the guide plane 24, the contact surface 31 is preferably in the range between 1.2 cm and 2.0 cm.
  • the back side 21 preferably has, in a section along the symmetry axis 17 in the support area 22 has a recessed grip 34, the next to the tool holder 14 point, measured parallel to the working axis 17, lying on the working axis 17th
  • the user intuitively places the span between thumb and forefinger of his hand in the recessed grip 34 and initiates the force along this working area along the working axis 17 .
  • the support portion 22 for thumb and forefinger of the guide hand may be recessed into the housing 11 to facilitate holding the guide hand in the ergonomically favorable attitude.
  • the recessed bearing area 22 has along the legs 23 elongated groove-shaped recess 35, which in the direction of the working axis 17 for example, 0.5 cm to 1 cm are sunk.
  • a width, ie dimension perpendicular to the guide plane 24 of the recess 35 corresponds approximately to the width of a thumb.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Sawing (AREA)

Description

GEBIET DER ERFINDUNGFIELD OF THE INVENTION

Die vorliegende Erfindung betrifft eine Handwerkzeugmaschine, insbesondere einen Elektroschrauber, wie aus der EP 2 147 754 A1 oder DE 102008003111 U1 und dem Oberbegriff von Anspruch 1 bekannt.The present invention relates to a hand tool, in particular an electric screwdriver, as shown in EP 2 147 754 A1 or DE 102008003111 U1 and the preamble of claim 1.

Elektroschrauber können in den meisten Anwendungen mit einer Hand geführt werden. Ein von dem Anwender aufzubringendes Drehmoment und ein Anpressdruck sind typischerweise gering. Ein Pistolengriff genügt diesen Anwendungen und erlaubt eine kompakte und leichte Bauform. In einzelnen Anwendungsfällen, z.B. bei einer Befestigung von Blechen mittels Schrauben, ist ein hoher Anpressdruck erforderlich. Für solche Anwendungen kann der Anwender die Elektroschrauber mit einer zweiten Hand an einem lösbaren Zusatzhandgriff halten, den der Anwender nahe der Werkzeugaufnahme befestigen kann.Electric wrenches can be operated with one hand in most applications. A torque to be applied by the user and a contact pressure are typically low. A pistol grip meets these applications and allows a compact and lightweight design. In individual applications, e.g. in a mounting of sheets by means of screws, a high contact pressure is required. For such applications, the user can hold the power wrenches with a second hand on a detachable auxiliary handle, which the user can attach near the tool holder.

OFFENBARUNG DER ERFINDUNGDISCLOSURE OF THE INVENTION

Die erfindungsgemäße Handwerkzeugmaschine, z.B. ein Elektroschrauber hat eine Werkzeugaufnahme zum Haltern eines Werkzeuges längs einer Achse. Ein Gehäuse hat einen Griffbereich für eine erste Hand. Der Griffbereich hat einen Auflageabschnitt für Daumen und Zeigefinger in einer Ebene mit der Achse und einen Schaftabschnitt zum Umgreifen auf einer Seite der Ebene. Eine Anlagefläche für eine zweite Hand, die abgewandt von der Werkzeugaufnahme und auf einer anderen Seite der Ebene angeordnet ist, ist zwischen 80 Grad und 100 Grad zur Ebene geneigt.The hand tool of the invention, e.g. An electric screwdriver has a tool holder for holding a tool along an axis. A housing has a grip area for a first hand. The grip portion has a thumb and forefinger rest portion in a plane with the shaft and a shaft portion for grasping on one side of the plane. An abutment surface for a second hand, which is remote from the tool holder and disposed on another side of the plane, is inclined between 80 degrees and 100 degrees to the plane.

Die Anlagefläche ermöglicht einem Anwender einen zusätzlichen Anpressdruck auf das Werkzeug auszuüben, z.B. indem der Handballen der zweiten Hand gegen die Anlagefläche presst. Obwohl mit dem Handballen eine höhere Kraft als mit der Handspanne zwischen Daumen und Zeigerfinger eingeleitet werden kann, zeigten überraschend Studien, dass die Anordnung der Anlagefläche versetzt zu der Achse und der Griffbereich für Handspanne in der Ebene mit der Achse bei einem langen Einsatz als ergonomischer wahrgenommen werden. Mit der gewählten Neigung wird ein Abrutschen der Hand von dem Gerät oder ein Rutschen der zweiten Hand gegen die erste Hand vermieden.The contact surface allows a user to exert an additional pressure on the tool, for example by the palm of the hand of the second hand pressed against the contact surface. Although a greater force can be introduced with the heel of the hand than with the hand span between the thumb and the index finger, studies have surprisingly shown that the disposition of the abutment surface offset from the axis and the hand grip in the plane with the axis are more ergonomic during long use become. With the selected inclination slipping the hand of the device or slipping the second hand is avoided against the first hand.

Erfindungsgemäß hat die Anlagefläche eine Abmessung von wenigstens 1,2 cm senkrecht zu der Ebene.According to the invention, the contact surface has a dimension of at least 1.2 cm perpendicular to the plane.

Erfindungsgemäß ist der Auflageabschnitt für Daumen und Zeigerfinger in einer Vertiefung des Gehäuses angeordnet.According to the invention, the support section for thumb and index finger is arranged in a recess of the housing.

KURZE BESCHREIBUNG DER FIGURENBRIEF DESCRIPTION OF THE FIGURES

Die nachfolgende Beschreibung erläutert die Erfindung anhand von exemplarischen Ausführungsformen und Figuren. In den Figuren zeigen:

Fig. 1
einen Elektroschrauber;
Fig. 2
einen Querschnitt durch den Elektroschrauber.
The following description explains the invention with reference to exemplary embodiments and figures. In the figures show:
Fig. 1
an electric screwdriver;
Fig. 2
a cross section through the electric screwdriver.

Gleiche oder funktionsgleiche Elemente werden durch gleiche Bezugszeichen in den Figuren indiziert, soweit nicht anders angegeben.Identical or functionally identical elements are indicated by the same reference numerals in the figures, unless stated otherwise.

AUSFÜHRUNGSFORMEN DER ERFINDUNGEMBODIMENTS OF THE INVENTION

Fig. 1 zeigt einen Elektroschrauber 10 als exemplarische Handwerkzeugmaschine in einer Seitenansicht; Fig. 2 im Querschnitt in der Ebene II-II. Der Elektroschrauber 10 hat ein gewinkeltes Gehäuse 11, in dem ein Motor 12 durch einen Antriebsstrang 13 mit einer Werkzeugaufnahme 14 gekoppelt ist. Der Antriebsstrang 13 kann beispielsweise wenigstens eine Spindel, ein Getriebe, eine Überlastkupplung, ein Tangentialschlagwerk etc. enthalten. Eine Energieversorgung des Elektroschraubers 10, insbesondere des Motors 12, erfolgt durch einen Akkumulator 15, welcher an einem Fuß 16 des Gehäuses 11 lösbar befestigt ist. Fig. 1 shows an electric screwdriver 10 as an exemplary hand tool in a side view; Fig. 2 in cross-section in the plane II-II. The electric screwdriver 10 has an angled housing 11, in which a motor 12 is coupled by a drive train 13 with a tool holder 14 . For example, the powertrain 13 may include at least one spindle, a transmission, an overload clutch, a tangential impactor, and the like. A power supply of the electric screwdriver 10, in particular of the motor 12, is effected by an accumulator 15, which is detachably fastened to a foot 16 of the housing 11 .

Die Werkzeugaufnahme 14 legt eine Arbeitsachse 17 des Elektroschraubers 10 fest, indem es ein Werkzeug 18 längs der Arbeitsachse 17 ausrichtet. Der Anwender übt längs der Arbeitsachse 17 einen Anpressdruck aus, um eine Schraube in ein Werkstück zu schrauben.The tool holder 14 defines a working axis 17 of the electric screwdriver 10 by aligning a tool 18 along the working axis 17 . The user exerts along the working axis 17 a contact pressure to screw a screw into a workpiece.

Das Gehäuse 11 ist im Wesentlichen spiegelsymmetrisch zu einer Symmetrieebene 20, in welcher die Arbeitsachse 17 verläuft. Ein Anwender kann den Elektroschrauber 10 gleichermaßen mit der linken Hand oder der rechten Hand führen.The housing 11 is substantially mirror-symmetrical to a plane of symmetry 20, in which the working axis 17 extends. A user can equally guide the electric screwdriver 10 with his left hand or right hand.

Eine führende Hand kann der Anwender an eine von der Werkzeugaufnahme 14 abgewandte Rückseite 21 des Gehäuses 11 anlegen. Daumen und Zeigefinger liegen seitlich an dem Gehäuse 11 beidseitig der Symmetrieebene 20 in einem Auflagebereich 22 an. Der Auflagebereich 22 beginnt an der Rückseite 21 des Gehäuses 11 und hat zwei Schenkel 23, welche in Richtung zur Werkzeugaufnahme 14 verlaufen und U-förmig das Gehäuse 11 zwischen sich einschließen. Die Schenkel 23 des Auflagenbereichs 22 definieren eine Führungsebene 24, in welcher auch die Arbeitsachse 17 liegt und welche senkrecht zur Symmetrieebene 20 ist. Die Schenkel 23 sind etwa so lang wie ein Zeigerfinger.A leading hand, the user can create a remote from the tool holder 14 back 21 of the housing 11 . Thumb and forefinger are on the side of the housing 11 on both sides of the plane of symmetry 20 in a support area 22 at. The support region 22 begins at the rear side 21 of the housing 11 and has two legs 23, which extend in the direction of the tool holder 14 and enclose the housing 11 in a U-shaped manner between them. The legs 23 of the support portion 22 define a guide plane 24, in which also the working axis 17 is located and which is perpendicular to the plane of symmetry 20 . The legs 23 are about as long as a pointer finger.

Geneigt zur Arbeitsachse 17 hat das gewinkelte Gehäuse 11 einen Schaft 25. Eine Neigung 26 einer Längsachse 27 des Schafts 25 zur Arbeitsachse 17 kann zwischen 70 Grad und 90 Grad liegen. Der Schaft 25 bildet zusammen mit dem Auflagebereich 22 einen Handgriff 28. Die führende Hand kann den Schaft mit den verbleibenden Fingern umgreifen. An einer zur Werkzeugaufnahme 14 weisenden Vorderseite 29 des Schafts 25 ist ein Betriebstaster 30 vorgesehen, der zum Aktivieren des Elektroschraubers 10, insbesondere des Motors 12 ist. Der Anwender kann den Betriebstaster 30 mit den verbleibenden Fingern betätigen.Tilted to the working axis 17 , the angled housing 11 has a shaft 25. An inclination 26 of a longitudinal axis 27 of the shaft 25 to the working axis 17 may be between 70 degrees and 90 degrees. The shaft 25 forms together with the support area 22 a handle 28. The leading hand can grip the shaft with the remaining fingers. An operating button 30 , which is used to activate the electric screwdriver 10, in particular the motor 12, is provided on a front side 29 of the shaft 25 facing the tool holder 14 . The user can operate the operation button 30 with the remaining fingers.

An der Rückseite 21 des Gehäuses 11 ist eine Anlagefläche 31 für eine zweite Hand vorgesehen. Die Anlagefläche 31 ist auf der dem Schaft 25 gegenüberliegenden Seite der Führungsebene 24 angeordnet und in etwa in Verlängerung des Schafts 25. Die Anlagefläche 31 ist verläuft senkrecht oder einer Neigung 32 zwischen 80 Grad und 100 Grad zu der Arbeitsachse 17. Die Neigung 32 der Anlagefläche 31 ist vorzugsweise näher an 90 Grad zur Arbeitsachse 17 als die Neigung 26 der Längsachse 27 des Schafts 25. Die Höhe 33, d.h. Abmessung senkrecht zur Führungsebene 24, der Anlagefläche 31 liegt vorzugsweise im Bereich zwischen 1,2 cm und 2,0 cm.At the back 21 of the housing 11 , a contact surface 31 is provided for a second hand. The contact surface 31 is arranged on the side opposite the shaft 25 of the guide plane 24 and approximately in extension of the shaft 25. The contact surface 31 is perpendicular or an inclination 32 between 80 degrees and 100 degrees to the working axis 17. The inclination 32 of the contact surface 31 is preferably closer to 90 degrees to the working axis 17 than the inclination 26 of the longitudinal axis 27 of the shaft 25. The height 33, ie dimension perpendicular to the guide plane 24, the contact surface 31 is preferably in the range between 1.2 cm and 2.0 cm.

Die Rückseite 21 hat vorzugsweise in einem Schnitt entlang der Symmetrieachse 17 im Auflagebereich 22 eine Griffmulde 34, deren zur Werkzeugaufnahme 14 nächster Punkt, gemessen parallel zur Arbeitsachse 17, auf der Arbeitsachse 17 liegt. Der Anwender legt intuitiv die Spanne zwischen Daumen und Zeigerfinger seiner Hand in die Griffmulde 34 und leitet die Kraft über diesen Handbereich längs der Arbeitsachse 17 ein.The back side 21 preferably has, in a section along the symmetry axis 17 in the support area 22 has a recessed grip 34, the next to the tool holder 14 point, measured parallel to the working axis 17, lying on the working axis 17th The user intuitively places the span between thumb and forefinger of his hand in the recessed grip 34 and initiates the force along this working area along the working axis 17 .

Der Auflagebereich 22 für Daumen und Zeigefinger der Führhand kann in das Gehäuse 11 eingesenkt sein, um ein Halten der Führhand in der ergonomisch günstigen Haltung zu erleichtern. Der eingesenkte Auflagebereich 22 hat entlang der Schenkel 23 längliche nutenförmige Vertiefung 35, welche in Richtung zu der Arbeitsachse 17 für z.B. 0,5 cm bis 1 cm eingesenkt sind. Eine Breite, d.h. Abmessung senkrecht zur Führungsebene 24 der Vertiefung 35 entspricht etwa der Breite eines Daumens.The support portion 22 for thumb and forefinger of the guide hand may be recessed into the housing 11 to facilitate holding the guide hand in the ergonomically favorable attitude. The recessed bearing area 22 has along the legs 23 elongated groove-shaped recess 35, which in the direction of the working axis 17 for example, 0.5 cm to 1 cm are sunk. A width, ie dimension perpendicular to the guide plane 24 of the recess 35 corresponds approximately to the width of a thumb.

Claims (2)

  1. Hand-held power tool (10), in particular an electric screwdriver, comprising
    a tool holder (14) for supporting a tool (18) along a working axis (17),
    a motor (12) coupled to the tool holder (14) by a drive train (13),
    a housing (11) and
    a grip area for a first hand, wherein the grip area has a bearing portion (22) for the thumb and index finger in a guide plane (24) with the working axis (17) and a shaft portion designed to be grasped on one side of the guide plane (24), wherein the bearing portion for the thumb and index finger has a recessed grip (34) on a rear face of the housing (11) and wherein the deepest point of the recessed grip (34) is situated in the guide plane (24), characterised by
    a contact surface (31) for a second hand, wherein the contact surface (31), which is directed away from the tool holder (14) and arranged on another side of the guide plane (24), is inclined at an angle of between 80 degrees and 100 degrees relative to the plane and wherein the contact surface (31) has dimensions of at least 1.2 cm perpendicular to the guide plane (24).
  2. Hand-held power tool according to claim 1, characterised in that the bearing portion (22) for the thumb and index finger is sunk into the housing (11).
EP10155791.6A 2010-03-08 2010-03-08 Handheld power tool Active EP2364818B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10155791.6A EP2364818B1 (en) 2010-03-08 2010-03-08 Handheld power tool
JP2011049335A JP5822490B2 (en) 2010-03-08 2011-03-07 Hand-held tool device
US13/041,673 US8714282B2 (en) 2010-03-08 2011-03-07 Hand-held power tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10155791.6A EP2364818B1 (en) 2010-03-08 2010-03-08 Handheld power tool

Publications (2)

Publication Number Publication Date
EP2364818A1 EP2364818A1 (en) 2011-09-14
EP2364818B1 true EP2364818B1 (en) 2017-08-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10155791.6A Active EP2364818B1 (en) 2010-03-08 2010-03-08 Handheld power tool

Country Status (3)

Country Link
US (1) US8714282B2 (en)
EP (1) EP2364818B1 (en)
JP (1) JP5822490B2 (en)

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JP2011183546A (en) 2011-09-22
EP2364818A1 (en) 2011-09-14
US8714282B2 (en) 2014-05-06
JP5822490B2 (en) 2015-11-24
US20110297409A1 (en) 2011-12-08

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