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EP1652631B1 - Motor driven power tool - Google Patents

Motor driven power tool Download PDF

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Publication number
EP1652631B1
EP1652631B1 EP05023364A EP05023364A EP1652631B1 EP 1652631 B1 EP1652631 B1 EP 1652631B1 EP 05023364 A EP05023364 A EP 05023364A EP 05023364 A EP05023364 A EP 05023364A EP 1652631 B1 EP1652631 B1 EP 1652631B1
Authority
EP
European Patent Office
Prior art keywords
spindle
tool according
spindle shaft
locking mechanism
axially
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.)
Expired - Lifetime
Application number
EP05023364A
Other languages
German (de)
French (fr)
Other versions
EP1652631A1 (en
Inventor
Jan-Simon Blind
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP1652631A1 publication Critical patent/EP1652631A1/en
Application granted granted Critical
Publication of EP1652631B1 publication Critical patent/EP1652631B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • 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

Definitions

  • the invention relates to a power tool, in particular electric motor drivable tool device, in particular hand tool, with an axially adjustable spindle shaft, a switchable gear assembly, which is arranged axially movable with respect to the spindle shaft, and with an automatically activatable Spindelarretier till.
  • Such a tool device is known from DE 100 37 808 Al.
  • the power tool with or without impact function is operable.
  • the automatically activatable Spindelarretier founded is arranged on a separate shaft from the spindle shaft intermediate shaft.
  • EP 1 083 029 A1 which is regarded as the closest prior art, shows the preamble of independent claim 1. Again, the spindle locking device is arranged on an intermediate shaft.
  • the present invention has for its object to form a hand tool of the type mentioned space saving and with as few power transmissions.
  • the spindle shaft is axially movable relative to a drive-side component of the spindle locking, this drive-side component and with her further components, in particular a radially outer housing body of Spindelarretier adopted axially fixed and defined defined with respect to the machine housing of the power tool.
  • the spindle shaft is driven by a rotary coupling between the gear unit and the drive-side component of the spindle locking device.
  • the drive-side component of the spindle locking device then acts on a driven-side component, which is rotationally fixed or integrally formed with the spindle shaft.
  • the spindle shaft is also axially movable relative to the output-side component.
  • the gear assembly is axially displaceable relative to the rotary coupling means.
  • the rotational coupling means is axially displaceable relative to the drive-side component of the spindle locking device.
  • the rotary coupling means is axially displaceable together with the spindle shaft.
  • the rotary coupling means comprises a sleeve surrounding the spindle shaft, which is rotatably connected to the gear assembly. In this way, a very space-saving design of the rotary coupling means can be achieved, nevertheless a very uniform force or torque transmission is achieved.
  • the sleeve can be pushed onto the spindle shaft and is preferably in axial driving connection with the sleeve. This can be done for example by means of a Fuse element happen.
  • the spindle shaft can for this purpose have an axial stop for the sleeve and the other end of the sleeve, the securing element, for example in the form of a snap ring, be mounted.
  • the rotary coupling means as such is not directly rotationally fixed to the spindle shaft.
  • the sleeve has an external toothing.
  • the length of the sleeve is 30-80 mm, in particular 40-60 mm in the axial direction.
  • a locking inducing, ie force-absorbing component of the spindle locking device which is usually formed in the form of a cylindrical body or comprises a cylindrical component, rotationally fixed and axially immovable in the machine housing can be arranged.
  • the axially movable spindle shaft is arranged to be axially movable also with respect to the spindle locking device.
  • the spindle locking device comprises a housing component which radially surrounds its other components and which is preferably formed by the aforementioned force-absorbing component.
  • the spindle locking device may comprise a resilient securing element, which axially closes the spindle locking device and its movable components, ie in particular the drive-side component, axially fixed in position.
  • the Spindelarretier nails can be arranged in an advantageous manner in a gradation of the machine housing and thereby be at least one side axially supported against the machine housing.
  • the axially displaceable spindle shaft can cooperate advantageously with a toothed disk arrangement or a detent disk arrangement for carrying out a striking function or a percussion drilling operation.
  • a switching device is provided at the motor end of the spindle shaft, which adjusts the spindle shaft by axial displacement between a first axial position and a second axial position.
  • the first axial position can lead to an engagement of the detent disk arrangement or pulley arrangement, so that a striking function is performed, and the second axial position can thereby cause a shutdown or inactivation of the impact function.
  • FIG. 1 shows a sectional view of a partial area of a handheld power tool 2 according to the invention, which partial area surrounds a spindle shaft 4.
  • the spindle shaft 4 extends continuously to a projecting from a machine housing 6 and a threaded portion 8 bearing free end to which a chuck body can be fastened.
  • the spindle shaft 4 is drivable by an electric motor, not shown, which is engageable via a not shown pinion with a gear assembly 10 in drive connection.
  • the gear assembly 10 is movable in the axial direction 11, but even closer to descriptive manner rotatably connected to a rotary coupling element 12.
  • the rotary coupling element 12 is formed as a sleeve 14 and is connected via an external toothing 18 in drive connection with a drive-side component 20 of a spindle locking device designated overall by the reference numeral 22.
  • the drive-side component 20 also has, as shown in FIG. 2, axial driving extensions 24, which bring about drive of the spindle shaft 4 via clamping bodies 26 and radially extended drive cams 28 of a driven-side component 29 of the spindle locking device 22.
  • the spindle shaft 4 cooperates with a detent disc assembly 30 for performing a percussion drilling operation, wherein a detent disc 32 is rotatably connected to the spindle shaft 4 and the other detent disc 34 is fixed to the machine housing fixed.
  • a detent disc 32 is rotatably connected to the spindle shaft 4 and the other detent disc 34 is fixed to the machine housing fixed.
  • the detent disks 32, 34 are disengaged, so that the Schlagbohrfunktion is turned off.
  • a switching device 47 is provided, by means of which the spindle shaft 4 is axially adjustable, so starting from the position shown in Figure 1 is moved to the left, in which the detent disks 32, 34 cooperate and rotatory drive the spindle shaft 4 exercise a Schlagbohrfunktion.
  • the spindle locking device 22 which can also be seen in section from FIG. 2, is surrounded or delimited by an outer component 35 in the form of a cylindrical housing component 36, which in turn preferably presses into a graduation of the machine housing 6 of FIG Hand tool is used.
  • This cylindrical housing member 36 at the same time forms those component 35, which in the exercise of Spindelarretmaschine derives the forces occurring in this case on the machine housing 6 or transmits to this. He must be stably taken up in the machine housing 6 for this purpose. It is intended in the position shown in Figure 1 set.
  • the sectional plane II-II in Figure 2 is such that of the drive-side component 20 only the axial driving extensions 24 are visible.
  • the clamping bodies 26 are pressed against spring preload by spring means 38 in the release position shown in FIG.
  • the torque transmission takes place via these axial driving extensions 24 on the clamping body 26 and from there to the radial cam 28 of the output-side component 29 of the spindle locking device 22, which is in rotational connection with the spindle shaft 4 via the toothing 31.
  • the drive of the drive-side component 20 via the rotary coupling means 12 takes place in the form of the sleeve 14.
  • This sleeve 14 is pushed onto the spindle shaft 4 and as such relative to the spindle shaft 4 rotatable.
  • the sleeve 14 is supported on an axial collar 42 of the spindle shaft 4.
  • the sleeve 14 is held in the illustrated axial position with respect to the spindle shaft 4 by a retaining ring-like securing element 44.
  • the sleeve 14 is thus movable together with the spindle shaft 4 in the axial direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The tool e.g. hand tool (2) can be driven by motor, has a spindle shaft, which is axially adjustable with respect to drive side component (20) of spindle locking mechanism (22) in the axial direction (11). The drive side component is fixed in axial direction with respect to machine housing (6). The gear construction unit (10) lies over the turning coupler (12).

Description

Die Erfindung betrifft ein motorisch, insbesondere elektromotorisch antreibbares Werkzeuggerät, insbesondere Handwerkzeuggerät, mit einer axial verstellbaren Spindelwelle, einer umschaltbaren Getriebebaugruppe, die bezüglich der Spindelwelle axial bewegbar angeordnet ist, und mit einer selbsttätig aktivierbaren Spindelarretiereinrichtung.The invention relates to a power tool, in particular electric motor drivable tool device, in particular hand tool, with an axially adjustable spindle shaft, a switchable gear assembly, which is arranged axially movable with respect to the spindle shaft, and with an automatically activatable Spindelarretiereinrichtung.

Ein derartiges Werkzeuggerät ist bekannt aus DE 100 37 808 Al. Durch axiales Verstellen der Spindelwelle ist das Werkzeuggerät mit oder ohne Schlagfunktion betreibbar. Die selbsttätig aktivierbare Spindelarretiereinrichtung ist auf einer von der Spindelwelle getrennten Zwischenwelle angeordnet.Such a tool device is known from DE 100 37 808 Al. By axial adjustment of the spindle shaft, the power tool with or without impact function is operable. The automatically activatable Spindelarretiereinrichtung is arranged on a separate shaft from the spindle shaft intermediate shaft.

Aufgrund der Verwendung zweier Wellen ist die Ausbildung des bekannten Handwerkzeuggeräts aufwendig und erfordert entsprechend großen Bauraum.Due to the use of two waves, the design of the known hand tool device is complicated and requires correspondingly large space.

DE 200 05 923 U1 offenbart ein gattungsfremdes Handwerkzeuggerät mit einer einzigen feststehenden Spindelwelle, auf der eine Getriebebaugruppe in axialer Richtung verstellbar angeordnet ist. Außerdem ist eine Spindelarretiervorrichtung in axial unveränderlicher Anordnung bezüglich der Spindelwelle und des Maschinengehäuses vorgesehen.DE 200 05 923 U1 discloses a non-generic hand tool with a single fixed spindle shaft on which a gear assembly is arranged to be adjustable in the axial direction. In addition, a Spindelarretiervorrichtung is provided in an axially fixed arrangement with respect to the spindle shaft and the machine housing.

EP 1 083 029 A1 das als nächstliegender Stand der Technik angesehen wird, zeigt den Oberbegriff des unabhängigen Anspruchs 1. Wiederum ist die Spindelarretiereinrichtung auf einer Zwischenwelle angeordnet.EP 1 083 029 A1, which is regarded as the closest prior art, shows the preamble of independent claim 1. Again, the spindle locking device is arranged on an intermediate shaft.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Handwerkzeuggerät der eingangs genannten Art platzsparend und mit möglichst wenigen Kraftübertragungen auszubilden.The present invention has for its object to form a hand tool of the type mentioned space saving and with as few power transmissions.

Diese Aufgabe wird bei einem gattungsgemäßen Werkzeuggerät erfindungsgemäß dadurch gelöst, dass die Spindelarretiereinrichtung auf der Spindelwelle angeordnet ist und dass die Spindelwelle gegenüber einer antriebsseitigen Komponente der Spindelarretiereinrichtung axial bewegbar und die antriebsseitige Komponente der Spindelarretiereinrichtung in axialer Richtung bezüglich eines Maschinengehäuses fest angeordnet ist und dass die Getriebebaugruppe über ein Drehkopplungsmittel in Drehmitnahmeverbindung mit der antriebsseitigen Komponente der Spindelarretiereinrichtung steht.This object is achieved in a generic tool device according to the invention in that the spindle locking is arranged on the spindle shaft and that the spindle shaft against a drive-side component of the spindle locking axially movable and the drive-side component of Spindelarretiereinrichtung in the axial direction with respect to a machine housing is fixed and that the transmission assembly is in rotational drive connection with the drive-side component of Spindelarretiereinrichtung via a rotary coupling means.

Es wird also erfindungsgemäß vorgeschlagen, die Spindelarretiereinrichtung auf der Spindelwelle anzuordnen. Dadurch, dass die Spindelwelle gegenüber einer antriebsseitigen Komponente der Spindelarretiereinrichtung axial bewegbar ist, kann diese antriebsseitige Komponente und mit ihr weitere Bestandteile, insbesondere ein radial äußerer Gehäusekörper der Spindelarretiereinrichtung axial fest und definiert bezüglich dem Maschinengehäuse des Werkzeuggeräts festgelegt werden. Der Antrieb der Spindelwelle erfolgt durch eine Drehkopplung zwischen der Getriebebaugruppe und der antriebsseitigen Komponente der Spindelarretiereinrichtung. Die antriebsseitige Komponente der Spindelarretiereinrichtung wirkt dann auf eine abtriebsseitige Komponente, die drehfest oder einstückig mit der Spindelwelle ausgebildet ist. Im ersteren Fall erweist es sich als vorteilhaft, wenn die Spindelwelle auch gegenüber der abtriebsseitigen Komponente axial bewegbar ist.It is therefore proposed according to the invention to arrange the Spindelarretiereinrichtung on the spindle shaft. Characterized in that the spindle shaft is axially movable relative to a drive-side component of the spindle locking, this drive-side component and with her further components, in particular a radially outer housing body of Spindelarretiereinrichtung axially fixed and defined defined with respect to the machine housing of the power tool. The spindle shaft is driven by a rotary coupling between the gear unit and the drive-side component of the spindle locking device. The drive-side component of the spindle locking device then acts on a driven-side component, which is rotationally fixed or integrally formed with the spindle shaft. In the former case, it proves to be advantageous if the spindle shaft is also axially movable relative to the output-side component.

Des Weiteren erweist es sich als vorteilhaft, dass die Getriebebaugruppe gegenüber dem Drehkopplungsmittel axial verschieblich ist.Furthermore, it proves to be advantageous that the gear assembly is axially displaceable relative to the rotary coupling means.

Nach einem weiteren Erfindungsgedanken ist das Drehkopplungsmittel gegenüber der antriebsseitigen Komponente der Spindelarretiereinrichtung axial verschieblich.According to a further concept of the invention, the rotational coupling means is axially displaceable relative to the drive-side component of the spindle locking device.

In noch weitergehender Ausbildung der Erfindung ist das Drehkopplungsmittel zusammen mit der Spindelwelle axial verlagerbar. Nach einer bevorzugten Ausführungsform umfasst das Drehkopplungsmittel eine die Spindelwelle umgebende Hülse, die drehfest mit der Getriebebaugruppe verbunden ist. Auf diese Weise kann eine sehr raumsparende Ausbildung des Drehkopplungsmittels erreicht werden, wobei gleichwohl eine sehr gleichmäßige Kraft- bzw. Drehmomentübertragung erzielt ist.
Die Hülse lässt sich auf die Spindelwelle aufschieben und steht vorzugsweise in axialer Mitnahmeverbindung mit der Hülse. Dies kann beispielsweise mittels eines Sicherungselements geschehen. Die Spindelwelle kann hierfür einen axialen Anschlag für die Hülse aufweisen und anderenends der Hülse kann das Sicherungselement, beispielsweise in Form eines Sprengrings, montierbar sein. Trotz der axialen Mitnahmeverbindung ist das Drehkopplungsmittel als solches nicht unmittelbar drehfest zur Spindelwelle.In still further embodiment of the invention, the rotary coupling means is axially displaceable together with the spindle shaft. According to a preferred embodiment, the rotary coupling means comprises a sleeve surrounding the spindle shaft, which is rotatably connected to the gear assembly. In this way, a very space-saving design of the rotary coupling means can be achieved, nevertheless a very uniform force or torque transmission is achieved.
The sleeve can be pushed onto the spindle shaft and is preferably in axial driving connection with the sleeve. This can be done for example by means of a Fuse element happen. The spindle shaft can for this purpose have an axial stop for the sleeve and the other end of the sleeve, the securing element, for example in the form of a snap ring, be mounted. Despite the axial driving connection, the rotary coupling means as such is not directly rotationally fixed to the spindle shaft.

Nach einem weiteren Erfindungsgedanken weist die Hülse eine Außenverzahnung auf. Dies eröffnet die Möglichkeit, dass die Getriebebaugruppe über diese Außenverzahnung drehfest mit der Hülse als Drehkopplungsmittel verbunden ist. Es eröffnet aber außerdem die Möglichkeit, eine axiale Verschieblichkeit zwischen Getriebebaugruppe und Hülse vorzusehen. Entsprechendes gilt für die Funktionsverbindung zwischen Drehkopplungsmittel oder Hülse und der antriebsseitigen Komponente der Spindelarretiereinrichtung. Auch hier kann über eine Außenverzahnung einerseits eine drehfeste Verbindung, andererseits aber eine axiale Bewegbarkeit der Bestandteile erreicht werden.According to a further inventive concept, the sleeve has an external toothing. This opens up the possibility that the gear assembly is rotatably connected via this external toothing with the sleeve as a rotary coupling means. However, it also offers the possibility of providing axial displaceability between the gear assembly and sleeve. The same applies to the functional connection between the rotary coupling means or sleeve and the drive-side component of the spindle locking device. Here, too, can be achieved via an external toothing on the one hand a rotationally fixed connection, on the other hand, however, an axial mobility of the components.

Die Länge der Hülse beträgt 30 - 80 mm, insbesondere 40 - 60 mm in der axialen Richtung.The length of the sleeve is 30-80 mm, in particular 40-60 mm in the axial direction.

Es erweist sich als besonders vorteilhaft, dass ein die Arretierung herbeiführender, also kraftaufnehmender Bestandteil der Spindelarretiereinrichtung, der zumeist in Form eines zylindrischen Körpers ausgebildet ist oder eine zylindrische Komponente umfasst, drehfest und axial unverschieblich im Maschinengehäuse angeordnet werden kann. Dies ist möglich, weil die axial bewegbare Spindelwelle auch bezüglich der Spindelarretiereinrichtung axial bewegbar angeordnet ist. Die für ein Funktionieren der Spindelarretiereinrichtung wichtige Festlegung der kraftaufnehmenden Bestandteile zum Maschinengehäuse wird dadurch möglich, und zwar obwohl die antriebsseitige Komponente der Spindelarretiereinrichtung in einer drehmomentübertragenden Antriebsverbindung mit der Getriebebaugruppe steht.It proves to be particularly advantageous that a locking inducing, ie force-absorbing component of the spindle locking device, which is usually formed in the form of a cylindrical body or comprises a cylindrical component, rotationally fixed and axially immovable in the machine housing can be arranged. This is possible because the axially movable spindle shaft is arranged to be axially movable also with respect to the spindle locking device. The important for a functioning of Spindelarretiereinrichtung determination of the force-absorbing components to the machine housing is thereby possible, although the drive-side component of the spindle locking device is in a torque-transmitting drive connection with the gear assembly.

In vorteilhafter Weise umfasst die Spindelarretiereinrichtung ein ihre übrigen Komponenten radial umgebendes Gehäusebauteil, das vorzugsweise von dem vorerwähnten kraftaufnehmenden Bestandteil gebildet ist. In weiterer Ausbildung der Erfindung kann die Spindelarretiereinrichtung ein federndes Sicherungselement umfassen, welches die Spindelarretiereinrichtung axial abschließt und deren bewegbare Komponenten, also insbesondere die antriebsseitige Komponente, axial lagefixiert.Advantageously, the spindle locking device comprises a housing component which radially surrounds its other components and which is preferably formed by the aforementioned force-absorbing component. In a further embodiment of the invention, the spindle locking device may comprise a resilient securing element, which axially closes the spindle locking device and its movable components, ie in particular the drive-side component, axially fixed in position.

Die Spindelarretiereinrichtung kann in vorteilhafter Weise in einer Abstufung des Maschinengehäuses angeordnet sein und dadurch zumindest einseitig axial gegen das Maschinengehäuse abgestützt sein.The Spindelarretiereinrichtung can be arranged in an advantageous manner in a gradation of the machine housing and thereby be at least one side axially supported against the machine housing.

Die axial verschiebbare Spindelwelle kann in vorteilhafter Weise mit einer Zahnscheibenanordnung oder einer Rastenscheibenanordnung zur Ausführung einer Schlagfunktion oder eines Schlagbohrbetriebs zusammenwirken.The axially displaceable spindle shaft can cooperate advantageously with a toothed disk arrangement or a detent disk arrangement for carrying out a striking function or a percussion drilling operation.

Vorzugsweise ist am motorseitigen Ende der Spindelwelle eine Umschaltvorrichtung vorgesehen, welche die Spindelwelle durch axiale Verlagerung zwischen einer ersten axialen Stellung und einer zweiten axialen Stellung verstellt. Die erste axiale Stellung kann dabei zu einem Eingriff der Rastenscheibenanordnung oder Zahnscheibenanordnung führen, so dass eine Schlagfunktion ausgeführt wird, und die zweite axiale Stellung kann dabei eine Abschaltung oder Inaktivierung der Schlagfunktion bewirken.Preferably, a switching device is provided at the motor end of the spindle shaft, which adjusts the spindle shaft by axial displacement between a first axial position and a second axial position. The first axial position can lead to an engagement of the detent disk arrangement or pulley arrangement, so that a striking function is performed, and the second axial position can thereby cause a shutdown or inactivation of the impact function.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den beigefügten Patentansprüchen und aus der zeichnerischen Darstellung und nachfolgenden Beschreibung einer bevorzugten Ausführungsform des erfindungsgemäßen Werkzeuggeräts. In der Zeichnung zeigt:

Figur 1
eine Schnittansicht eines die Spindelwelle umfassenden Teils eines erfindungsgemäßen Handwerkzeuggeräts;
Figur 2
eine Schnittansicht durch das Handwerkzeuggerät im Bereich der Spindelarretiereinrichtung mit Schnittebene A-A;
Figur 3
eine perspektivische Darstellung der abtriebsseitigen Komponente der Spindelarretiereinrichtung, und
Figur 4
eine perspektivische Darstellung der auf der Spindelwelle angeordneten Komponenten.
Further features, details and advantages of the invention will become apparent from the appended claims and from the drawings and the following description of a preferred embodiment of the inventive tooling device. In the drawing shows:
FIG. 1
a sectional view of a part of the spindle shaft of a hand tool according to the invention;
FIG. 2
a sectional view through the hand tool in the range of Spindelarretiereinrichtung with sectional plane AA;
FIG. 3
a perspective view of the output-side component of Spindelarretiereinrichtung, and
FIG. 4
a perspective view of the arranged on the spindle shaft components.

Figur 1 zeigt eine Schnittansicht eines Teilbereichs eines erfindungsgemäßen Handwerkzeuggeräts 2, welcher Teilbereich eine Spindelwelle 4 umgibt. Die Spindelwelle 4 erstreckt sich durchgehend bis zu einem aus einem Maschinengehäuse 6 vorstehenden und einen Gewindeabschnitt 8 tragenden freien Ende, an dem ein Futterkörper befestigbar ist. Die Spindelwelle 4 ist von einem nicht dargestellten Elektromotor antreibbar, der über ein nicht dargestelltes Ritzel mit einer Getriebebaugruppe 10 in Antriebsverbindung bringbar ist. Die Getriebebaugruppe 10 ist in axialer Richtung 11 beweglich, jedoch auf noch näher zu beschreibende Weise drehfest mit einem Drehkopplungselement 12 verbunden. Das Drehkopplungselement 12 ist als Hülse 14 ausgebildet und steht über eine Außenverzahnung 18 in Antriebsverbindung mit einer antriebsseitigen Komponente 20 einer insgesamt mit dem Bezugszeichen 22 bezeichneten Spindelarretiereinrichtung. Die antriebsseitige Komponente 20 weist auch aus Figur 2 ersichtliche axiale Mitnahmefortsätze 24 auf, die über Klemmkörper 26 und radial erstreckte Antriebsnocken 28 einer abtriebsseitigen Komponente 29 der Spindelarretiereinrichtung 22 einen Antrieb der Spindelwelle 4 bewirken. Die Drehverbindung zwischen der abtriebsseitigen Komponente 29 der Spindelarretiereinrichtung 22 und der Spindelwelle erfolgt über eine Verzahnung 31 (siehe Figur 3).FIG. 1 shows a sectional view of a partial area of a handheld power tool 2 according to the invention, which partial area surrounds a spindle shaft 4. The spindle shaft 4 extends continuously to a projecting from a machine housing 6 and a threaded portion 8 bearing free end to which a chuck body can be fastened. The spindle shaft 4 is drivable by an electric motor, not shown, which is engageable via a not shown pinion with a gear assembly 10 in drive connection. The gear assembly 10 is movable in the axial direction 11, but even closer to descriptive manner rotatably connected to a rotary coupling element 12. The rotary coupling element 12 is formed as a sleeve 14 and is connected via an external toothing 18 in drive connection with a drive-side component 20 of a spindle locking device designated overall by the reference numeral 22. The drive-side component 20 also has, as shown in FIG. 2, axial driving extensions 24, which bring about drive of the spindle shaft 4 via clamping bodies 26 and radially extended drive cams 28 of a driven-side component 29 of the spindle locking device 22. The rotational connection between the output-side component 29 of the spindle locking device 22 and the spindle shaft via a toothing 31 (see Figure 3).

Die Spindelwelle 4 wirkt mit einer Rastenscheibenanordnung 30 zur Ausführung eines Schlagbohrbetriebs zusammen, wobei eine Rastenscheibe 32 drehfest mit der Spindelwelle 4 verbunden ist und die andere Rastenscheibe 34 maschinengehäusefest angeordnet ist. In der in Figur 1 dargestellten axialen Stellung der Spindelwelle 4 sind die Rastenscheiben 32, 34 außer Eingriff, so dass die Schlagbohrfunktion ausgeschaltet ist. Am motorseitigen Ende der Spindelwelle 4 ist jedoch eine Umschaltvorrichtung 47 vorgesehen, mittels derer die Spindelwelle 4 axial verstellbar ist, also ausgehend von der in Figur 1 dargestellten Stellung nach links bewegbar ist, in der die Rastenscheiben 32, 34 zusammenwirken und bei rotatorischem Antrieb der Spindelwelle 4 eine Schlagbohrfunktion ausüben.The spindle shaft 4 cooperates with a detent disc assembly 30 for performing a percussion drilling operation, wherein a detent disc 32 is rotatably connected to the spindle shaft 4 and the other detent disc 34 is fixed to the machine housing fixed. In the axial position of the spindle shaft 4 shown in Figure 1, the detent disks 32, 34 are disengaged, so that the Schlagbohrfunktion is turned off. At the motor end of the spindle shaft 4, however, a switching device 47 is provided, by means of which the spindle shaft 4 is axially adjustable, so starting from the position shown in Figure 1 is moved to the left, in which the detent disks 32, 34 cooperate and rotatory drive the spindle shaft 4 exercise a Schlagbohrfunktion.

Die Spindelarretiereinrichtung 22, die im Schnitt auch aus Figur 2 ersichtlich ist, ist von einem äußeren Bestandteil 35 in Form eines zylindrischen Gehäusebauteils 36 umgeben oder begrenzt, welches seinerseits vorzugsweise im Presssitz in eine Abstufung des Maschinengehäuses 6 des Handwerkzeuggeräts eingesetzt ist. Dieses zylindrische Gehäusebauteil 36 bildet zugleich denjenigen Bestandteil 35, welcher bei der Ausübung der Spindelarretierung die hierbei auftretenden Kräfte auf das Maschinengehäuse 6 ableitet oder auf dieses überträgt. Er muss hierfür stabil in dem Maschinengehäuse 6 aufgenommen sein. Er ist bestimmungsgemäß in der dargestellten Position in Figur 1 festgelegt.The spindle locking device 22, which can also be seen in section from FIG. 2, is surrounded or delimited by an outer component 35 in the form of a cylindrical housing component 36, which in turn preferably presses into a graduation of the machine housing 6 of FIG Hand tool is used. This cylindrical housing member 36 at the same time forms those component 35, which in the exercise of Spindelarretierung derives the forces occurring in this case on the machine housing 6 or transmits to this. He must be stably taken up in the machine housing 6 for this purpose. It is intended in the position shown in Figure 1 set.

Innerhalb des zylindrischen Gehäusebauteils 36 sind die aus Figur 2 ersichtlichen Komponenten angeordnet. Die Schnittebene II-II in Figur 2 ist derart, dass von der antriebsseitigen Komponente 20 nur deren axiale Mitnahmefortsätze 24 ersichtlich sind. Über diese axialen Mitnahmefortsätze 24 werden bei einem vom Motor ausgehenden Antrieb die Klemmkörper 26 in die in Figur 2 dargestellte Freigabestellung entgegen einer Federvorspannung durch Federmittel 38 gedrückt. Dabei erfolgt die Drehmomentübertragung über diese axialen Mitnahmefortsätze 24 auf die Klemmkörper 26 und von dort auf die radialen Nocken 28 der abtriebsseitigen Komponente 29 der Spindelarretiereinrichtung 22, die über die Verzahnung 31 in Drehverbindung mit der Spindelwelle 4 steht.Within the cylindrical housing member 36, the apparent from Figure 2 components are arranged. The sectional plane II-II in Figure 2 is such that of the drive-side component 20 only the axial driving extensions 24 are visible. By means of these axial driving extensions 24, the clamping bodies 26 are pressed against spring preload by spring means 38 in the release position shown in FIG. In this case, the torque transmission takes place via these axial driving extensions 24 on the clamping body 26 and from there to the radial cam 28 of the output-side component 29 of the spindle locking device 22, which is in rotational connection with the spindle shaft 4 via the toothing 31.

Bei Abschalten des Motorantriebs bzw. Antrieb der Spindelwelle 4 ausgehend von deren futterseitigem Ende oder bei Nachlauf der Spindelwelle 4 werden die Klemmkörper 26 unter der Wirkung der Federmittel 38 oder durch die radialen Nocken 28 in eine Klemmstellung zwischen der Spindelwelle 4 und dem zylindrischen feststehenden Gehäusebauteil 36 bewegt, so dass die Spindelwelle 4 schlagartig festgesetzt wird. Die vorstehend beschriebenen Komponenten sind in axialer Richtung durch ein Sicherungselement 40 in Form einer Sprengringscheibe abgeschlossen bzw. in ihrer dargestellten axialen Position bezüglich dem zylindrischen Gehäusebauteil 36 und damit bezüglich dem Maschinengehäuse 6 fixiert.When switching off the motor drive or drive the spindle shaft 4, starting from the futterseitigem end or at caster of the spindle shaft 4, the clamping body 26 under the action of the spring means 38 or by the radial cam 28 in a clamping position between the spindle shaft 4 and the cylindrical fixed housing member 36th moves, so that the spindle shaft 4 is fixed abruptly. The components described above are completed in the axial direction by a securing element 40 in the form of a snap ring disc or in its illustrated axial position with respect to the cylindrical housing member 36 and thus fixed with respect to the machine housing 6.

Wie bereits erwähnt, erfolgt der Antrieb der antriebsseitigen Komponente 20 über das Drehkopplungsmittel 12 in Form der Hülse 14. Diese Hülse 14 ist auf die Spindelwelle 4 aufgeschoben und als solches gegenüber der Spindelwelle 4 drehbar. Die Hülse 14 stützt sich an einem axialen Bund 42 der Spindelwelle 4 ab. Anderenends ist die Hülse 14 durch ein sprengringartiges Sicherungselement 44 in der dargestellten axialen Position bezüglich der Spindelwelle 4 gehalten. Die Hülse 14 ist also zusammen mit der Spindelwelle 4 in axialer Richtung bewegbar. Über die Außenverzahnung 18 der Hülse 14 ist auch die Getriebebaugruppe 10 zwar drehfest mit der Hülse 14 verbunden, jedoch axial verschieblich gegenüber dieser. Desgleichen ist die Hülse 14 über ihre Außenverzahnung 18 mit einem Innenabschnitt 46 der antriebsseitigen Komponente 20 der Spindelarretiereinrichtung 22 drehfest verbunden, jedoch axial verschieblich zu dieser.As already mentioned, the drive of the drive-side component 20 via the rotary coupling means 12 takes place in the form of the sleeve 14. This sleeve 14 is pushed onto the spindle shaft 4 and as such relative to the spindle shaft 4 rotatable. The sleeve 14 is supported on an axial collar 42 of the spindle shaft 4. At the other end, the sleeve 14 is held in the illustrated axial position with respect to the spindle shaft 4 by a retaining ring-like securing element 44. The sleeve 14 is thus movable together with the spindle shaft 4 in the axial direction. About the outer teeth 18 of the sleeve 14 and the transmission assembly 10 is indeed rotatably connected to the sleeve 14, but axially displaceable with respect to this. Similarly, the sleeve 14 is rotatably connected via its outer teeth 18 with an inner portion 46 of the drive-side component 20 of the spindle locking device 22, but axially displaceable to this.

Wie vorausgehend beschrieben, eröffnet dies die Möglichkeit, einerseits eine axial verschiebbare Spindelwelle zur Ausführung eines Schlagbohrbetriebs vorzusehen, andererseits jedoch die Komponenten der Spindelarretiereinrichtung 22 in axialer Richtung bezüglich dem Maschinengehäuse 6 zu fixieren. Dadurch, dass der Antriebsstrang ausgehend von der Getriebebaugruppe 10 auf das Drehkopplungselement 12 in Form der Hülse 14 und von dort über die Außenverzahnung 18 auf die antriebsseitige Komponente 20 der Spindelarretiereinrichtung 22 führt, ist eine gleichmäßige, direkte und verlustarme Drehmomentübertragung gewährleistet, was ebenfalls als vorteilhaft angesehen wird.As described above, this opens up the possibility, on the one hand, of providing an axially displaceable spindle shaft for executing a percussion drilling operation, and, on the other hand, of fixing the components of the spindle locking device 22 in the axial direction with respect to the machine housing 6. Because the drive train, starting from the transmission assembly 10, leads to the rotary coupling element 12 in the form of the sleeve 14 and from there via the external teeth 18 to the drive-side component 20 of the spindle locking device 22, a uniform, direct and low-loss torque transmission is ensured, which is also advantageous is seen.

Claims (18)

  1. Tool (2) that can be driven by a motor, in particular a hand tool, comprising a spindle shaft (4) that is axially adjustable, a switchable gear assembly (10) which is arranged so as to be axially movable relative to the spindle shaft (4) and comprising a spindle locking mechanism (22) which can be activated automatically characterised in that the spindle locking mechanism (22) is arranged on the spindle shaft (4) and in that the spindle shaft (4) is arranged so as to be axially movable relative to a drive-side component (20) of the spindle locking mechanism (22) and the drive-side component (20) of the spindle locking mechanism (22) is securely arranged in an axial direction (11) relative to a machine housing (6), and in that the gear assembly (10) is connected by rotational entrainment to the drive-side component (20) of the spindle locking mechanism (22) via a rotational coupling means (12).
  2. Tool according to claim 1, characterised in that the gear assembly (10) is axially movable relative to the rotational coupling means (12).
  3. Tool according to either claim 1 or claim 2, characterised in that the rotational coupling means (12) is axially movable relative to the drive-side component (20) of the spindle locking mechanism (22).
  4. Tool according to claim 1, claim 2 or claim 3, characterised in that the spindle shaft (4) is axially movable relative to the driven-side component (29) of the spindle locking mechanism (22).
  5. Tool according to one or more of the preceding claims, characterised in that the rotational coupling means (12) is axially displaceable together with the spindle shaft (4).
  6. Tool according to one or more of the preceding claims, characterised in that the rotational coupling means (12) comprises a casing (14) surrounding the spindle shaft (4), which casing is rotationally engaged with the gear assembly (10).
  7. Tool according to claim 6, characterised in that the casing (14) is pushed onto the spindle shaft (4) and is connected to the spindle shaft (4) with axial entrainment.
  8. Tool according to either claim 6 or claim 7, characterised in that the casing (14) is connected to the spindle shaft (4) with axial entrainment using a securing element (44).
  9. Tool according to claim 6, claim 7 or claim 8, characterised in that the casing (14) has external teeth (18).
  10. Tool according to any one of claims 6 to 9, characterised in that the gear assembly (10) is rotationally engaged with the casing (14) via these external teeth (18).
  11. Tool according to any one of claims 6 to 10, characterised in that the drive-side component (20) of the spindle locking mechanism (22) is rotationally engaged with the casing (14) via these external teeth (18).
  12. Tool according to any one of claims 6 to 11, characterised in that the casing (14) has an axial length of from 30 to 80 mm, in particular from 40 to 60 mm.
  13. Tool according to one or more of the preceding claims, characterised in that a radially outer component (35) of the spindle locking mechanism (22) is arranged non-rotationally and such that it cannot move axially in the machine housing (6).
  14. Tool according to claim 13, characterised in that the radially outer component (35) forms a housing part (36) radially surrounding the components of the spindle locking mechanism (22).
  15. Tool according to one or more of the preceding claims, characterised in that a resilient securing element (40), in particular a snap ring, axially closes the spindle locking mechanism (22) and axially fixes the position of the components thereof.
  16. Tool according to one or more of the preceding claims, characterised in that the spindle locking mechanism (22) is arranged in a stepped portion of the machine housing (6), and thus is axially supported on one side.
  17. Tool according to one or more of the preceding claims, characterised in that the spindle shaft (4) cooperates with a toothed disc arrangement or a locking disc arrangement (30) for performing an impact function or an impact drilling operation.
  18. Tool according to one or more of the preceding claims, characterised in that a switching device (34) is provided on the motor-side end of the spindle shaft (4), which switching device adjusts the spindle shaft (4) between a first axial position and a second axial position by axial displacement.
EP05023364A 2004-10-27 2005-10-26 Motor driven power tool Expired - Lifetime EP1652631B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004052124A DE102004052124B3 (en) 2004-10-27 2004-10-27 Tool e.g. hand tool which can be driven by motor, has axially adjustable spindle shaft of gear arrangement which is movable axially with respect to spindle shaft and self actuating spindle locking mechanism

Publications (2)

Publication Number Publication Date
EP1652631A1 EP1652631A1 (en) 2006-05-03
EP1652631B1 true EP1652631B1 (en) 2007-02-14

Family

ID=35929713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05023364A Expired - Lifetime EP1652631B1 (en) 2004-10-27 2005-10-26 Motor driven power tool

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Country Link
EP (1) EP1652631B1 (en)
AT (1) ATE353741T1 (en)
DE (2) DE102004052124B3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007734A1 (en) * 2007-02-09 2008-08-14 C. & E. Fein Gmbh Machine tool with spindle lock
DE102008061183B4 (en) 2008-12-09 2011-03-03 Aeg Electric Tools Gmbh Hand-held rotary hammer and adapter
DE102009000065A1 (en) 2009-01-08 2010-07-15 Robert Bosch Gmbh Tool device with a spindle driven by a drive device
DE102009054929B4 (en) * 2009-12-18 2022-08-11 Robert Bosch Gmbh Hand tool device
US12496682B2 (en) 2022-08-15 2025-12-16 Techtronic Cordless Gp Die grinder with an offset gear transmission
CN119501619B (en) * 2025-01-16 2025-03-21 宁波海天精工股份有限公司 A turning and milling compound spindle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19942271C2 (en) * 1999-09-04 2002-01-31 Metabowerke Kg Power tool with a locking mechanism and a safety coupling
DE20005923U1 (en) * 2000-03-30 2000-06-29 Narex Česká Lípa a.s., Česká Lípa Hand machine tool with a blocker device for blocking the drive shaft
DE10037808A1 (en) * 2000-08-03 2002-02-14 Bosch Gmbh Robert Hand tool
DE10316889B4 (en) * 2003-04-12 2007-06-06 Metabowerke Gmbh Electric hand tool with a Klemmgesperre

Also Published As

Publication number Publication date
EP1652631A1 (en) 2006-05-03
DE102004052124B3 (en) 2006-04-27
DE502005000380D1 (en) 2007-03-29
ATE353741T1 (en) 2007-03-15

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