EP1881883B1 - Motor-driven machine-tool with a locking/releasing device for the spindle - Google Patents

Motor-driven machine-tool with a locking/releasing device for the spindle Download PDF

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Publication number
EP1881883B1
EP1881883B1 EP05750161A EP05750161A EP1881883B1 EP 1881883 B1 EP1881883 B1 EP 1881883B1 EP 05750161 A EP05750161 A EP 05750161A EP 05750161 A EP05750161 A EP 05750161A EP 1881883 B1 EP1881883 B1 EP 1881883B1
Authority
EP
European Patent Office
Prior art keywords
component
machine housing
tool
spindle
shaft
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.)
Not-in-force
Application number
EP05750161A
Other languages
German (de)
French (fr)
Other versions
EP1881883A1 (en
Inventor
Jörg Seyerle
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 EP1881883A1 publication Critical patent/EP1881883A1/en
Application granted granted Critical
Publication of EP1881883B1 publication Critical patent/EP1881883B1/en
Not-in-force 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools

Definitions

  • the invention relates to a motor-driven tool device, in particular hand tool, also battery-operated, such as drill, percussion drill, hammer drill or screwdriver, with the features of the preamble of claim 1.
  • Such a tool device is known from US 2002/0130007 A1.
  • Tool devices with a locking / releasing device for the spindle have become widely known, for example by DE 199 42 271 A1 .
  • EP 0 982 103 B1
  • the locking / releasing device If when switching off the motor drive of these tool devices by running the tool chuck with tool inserted therein the locking / releasing device is activated, so goes with the setting of the spindle, that the clamping body is brought into a blocking clamping position, a noise and a shock load, which is disadvantageously audible but noticeable to the user.
  • the present invention has set itself the task of countering this and to further improve the generic tool device.
  • the component comprises at least one radially extending approach, which projects into a slightly larger in the circumferential direction recess of the machine housing and rotatably cooperating with the machine housing and a circumferentially effective hard stop forms, which limited by conditioning against the machine housing mobility of the component.
  • the clamping body does not start directly against an absolutely fixed housing component and is suddenly fixed, or abruptly the drive spindle or the output part relative to the machine housing sets, but it is a relation to the machine housing with interposition the damper limited movable member provided opposite to the clamping body starts.
  • the component is limited rotatable relative to the machine housing, preferably in both directions of rotation. It is especially annular. It is further proposed that the component of the machine housing or a component of the machine housing (limited) is rotatably mounted.
  • the damping means may be formed in any desired manner. It could be a spring device.
  • an elastic material in particular a rubber body is used.
  • the damping means may advantageously have a Shore hardness of 30 to 80 Shore A.
  • the coupling of the component to the machine housing by the mentioned damping means may be formed in any desired manner, with an arrangement of the damping means in the radial direction between the component and the machine housing has proven to be expedient. It is also conceivable and advantageous that a plurality of damping means are provided at different locations, such as at diametrically opposite locations or offset by 120 ° in the circumferential direction points.
  • the invention proves to be particularly advantageous in battery-operated electric hand tool devices, in particular those with a planetary gear, since the problem described at the outset is particularly pronounced here.
  • the single figure illustrates schematically the principle of the inventively embodied locking / releasing device (spindle lock) in a hand tool.
  • a spindle 2 on which a tool chuck, not shown, for receiving a tool can be arranged rotationally fixed.
  • the spindle 2 is a spindle-side driven part or is rotatably and rigidly connected to such a spindle-side driven part 4.
  • a clamping body 6 is provided which is received in a space between the spindle 2 and a circumferentially closed component 8, which forms a machine-fixed brake ring 10.
  • Reference numeral 12 designates a machine housing or a component of the machine housing of the tool device.
  • the component 8, which acts as a brake ring 10, comprises a radial projection 14 which is somewhat larger in a circumferential direction formed recess 16 of the machine housing 12 protrudes.
  • a damping means 18 of an elastomeric material 20 is provided in the radial direction between the projection 14 and the machine housing 12.
  • the damping means 18 is received in complementary shaped recesses 22 in the projection 20, and 24 in the machine housing 12. It forms a limited deformable coupling between the component 8 and the machine housing 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Springs (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Braking Arrangements (AREA)
  • Drilling And Boring (AREA)

Abstract

The invention relates to a motor-driven or battery-powered machine-tool, in particular a hand machine-tool, such as a drill, a percussion drill, a hammer drill or a screwdriver. Said machine-tool comprises a machine casing, a driving motor, a spindle (2) which can be driven by the driving motor, whereby a locking/releasing device is provided between the driving motor and the spindle (2), which comprises a motor-sided driving element, a spindle-sided driven element (4), rotationally fixed to or integrally joined to said spindle (2) and at least one clamping body (6), and said machine-tool comprises a chuck for clamping a tool, which can be connected to the spindle (2), whereby said spindle (2) can be locked in relation to the machine casing (12) by application of a torque, acting from the chuck in the direction of the driving motor and can rotate freely in relation to the machine casing (12) by application of a torque, acting from the driving motor in the direction of the spindle (2). In order to make said machine-tool more convenient to operate, the clamping body (6) abuts against a component (8) during locking of the spindle (2), which is connected to the machine casing (2) through a damping means (18) with limited deformation.

Description

Die Erfindung betrifft ein motorbetriebenes Werkzeuggerät, insbesondere Handwerkzeuggerät, auch akkubetrieben, wie Bohrmaschine, Schlagbohrmaschine, Bohrhammer oder Schrauber, mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a motor-driven tool device, in particular hand tool, also battery-operated, such as drill, percussion drill, hammer drill or screwdriver, with the features of the preamble of claim 1.

Ein derartiges Werkzeuggerät ist bekannt aus US 2002/0130007 A1.Such a tool device is known from US 2002/0130007 A1.

Werkzeuggeräte mit einer Sperr-/Freigabeeinrichtung für die Spindel (automatischer Spindelstopp) sind vielfach bekannt geworden, beispielsweise durch DE 199 42 271 A1 , DE 103 38 608 B , DE 103 36 637 B , DE 103 16 889 , DE 196 08 499 A1 , EP 0 982 103 B1 .Tool devices with a locking / releasing device for the spindle (automatic spindle stop) have become widely known, for example by DE 199 42 271 A1 . DE 103 38 608 B . DE 103 36 637 B . DE 103 16 889 . DE 196 08 499 A1 . EP 0 982 103 B1 ,

Wenn beim Abschalten des motorischen Antriebs dieser Werkzeuggeräte durch Nachlaufen des Werkzeugfutters mit darin eingesetztem Werkzeug die Sperr-/Freigabeeinrichtung aktiviert wird, so geht mit dem Festsetzen der Spindel dadurch, dass der Klemmkörper in eine blockierende Klemmlage gebracht wird, eine Geräuschentwicklung und eine Stoßbelastung einher, die für den Benutzer in nachteiliger Weise hörbar aber auch spürbar ist.If when switching off the motor drive of these tool devices by running the tool chuck with tool inserted therein the locking / releasing device is activated, so goes with the setting of the spindle, that the clamping body is brought into a blocking clamping position, a noise and a shock load, which is disadvantageously audible but noticeable to the user.

Die vorliegende Erfindung hat sich zur Aufgabe gesetzt, dem zu begegnen und das gattungsgemäße Werkzeuggerät weiter zu verbessern.The present invention has set itself the task of countering this and to further improve the generic tool device.

Diese Aufgabe wird bei einem Werkzeuggerät der genannten Art erfindungsgemäß dadurch gelöst, dass das Bauteil wenigstens einen in radialer Richtung erstreckten Ansatz umfasst, der in eine in Umfangsrichtung etwas größer ausgebildete Ausnehmung des Maschinengehäuses einragt und drehbegrenzend mit dem Maschinengehäuse zusammenwirkt und einen in Umfangsrichtung wirksamen harten Anschlag bildet, der durch Anlage gegen das Maschinengehäuse eine Bewegbarkeit des Bauteils begrenzt.This object is achieved in a tool device of the type mentioned according to the invention that the component comprises at least one radially extending approach, which projects into a slightly larger in the circumferential direction recess of the machine housing and rotatably cooperating with the machine housing and a circumferentially effective hard stop forms, which limited by conditioning against the machine housing mobility of the component.

Es wird also erfindungsgemäß vorgeschlagen, dass der Klemmkörper nicht direkt gegen ein absolut gehäusefestes Bauteil anläuft und schlagartig festgesetzt wird, bzw. schlagartig die Antriebsspindel bzw. deren Abtriebsteil gegenüber dem Maschinengehäuse festsetzt, sondern es wird ein gegenüber dem Maschinengehäuse unter Zwischenordnung des Dämpfungsmittels begrenzt bewegliches Bauteil vorgesehen, gegenüber dem der Klemmkörper anläuft.It is therefore proposed according to the invention that the clamping body does not start directly against an absolutely fixed housing component and is suddenly fixed, or abruptly the drive spindle or the output part relative to the machine housing sets, but it is a relation to the machine housing with interposition the damper limited movable member provided opposite to the clamping body starts.

Das Bauteil ist gegenüber dem Maschinengehäuse begrenzt verdrehbar und zwar vorzugsweise in beide Drehrichtungen. Es ist insbesondere ringförmig. Weiter wird vorgeschlagen, dass das Bauteil von dem Maschinengehäuse oder einer Komponente des Maschinengehäuses (begrenzt) drehbar gelagert ist.The component is limited rotatable relative to the machine housing, preferably in both directions of rotation. It is especially annular. It is further proposed that the component of the machine housing or a component of the machine housing (limited) is rotatably mounted.

Das Dämpfungsmittel kann in an sich beliebiger Weise ausgebildet sein. Es könnte sich hierbei um ein Federmittel handeln. Vorteilhafter Weise wird ein elastisches Material, insbesondere ein Gummikörper verwandt. Das Dämpfungsmittel kann vorteilhafter Weise eine Shore-Härte von 30 bis 80 Shore A aufweisen.The damping means may be formed in any desired manner. It could be a spring device. Advantageously, an elastic material, in particular a rubber body is used. The damping means may advantageously have a Shore hardness of 30 to 80 Shore A.

Die Kopplung des Bauteils mit dem Maschinengehäuse durch das erwähnte Dämpfungsmittel kann in an sich beliebiger Weise ausgebildet sein, wobei sich eine Anordnung des Dämpfungsmittels in radialer Richtung zwischen dem Bauteil und dem Maschinengehäuse als zweckmäßig erwiesen hat. Es ist auch denkbar und vorteilhaft, dass mehrere Dämpfungsmittel an verschiedenen Stellen, etwa an diametral gegenüberliegenden Stellen oder an um 120° in Umfangsrichtung versetzten Stellen vorgesehen sind.The coupling of the component to the machine housing by the mentioned damping means may be formed in any desired manner, with an arrangement of the damping means in the radial direction between the component and the machine housing has proven to be expedient. It is also conceivable and advantageous that a plurality of damping means are provided at different locations, such as at diametrically opposite locations or offset by 120 ° in the circumferential direction points.

Es können auch mehrere Anschläge zur gleichmäßigen Einleitung von Kräften vorgesehen werden.It can too several stops are provided for the uniform introduction of forces.

Insgesamt kann bei einer erfindungsgemäßen Ausbildung eine harte Stillsetzung der Werkzeugspindel, die als laut und unangenehm empfunden werden kann, durch eine kaum mehr spür- und hörbare gedämpfte Stillsetzung der Spindel ersetzt werden. Damit wird auch das Risiko verringert, dass sich ein Werkzeugfutter unbeabsichtigt löst.Overall, in a design according to the invention, a hard shutdown of the tool spindle, which can be perceived as loud and unpleasant, by a barely perceptible and audible damped shutdown of the spindle be replaced. This also reduces the risk of a tool chuck unintentionally releasing.

Es sei auch darauf hingewiesen, dass sich die Erfindung gerade bei akkubetriebenen Elektrohandwerkzeuggeräten, insbesondere bei solchen mit einem Planetengetriebe, als besonders vorteilhaft erweist, da sich das eingangs beschriebene Problem hier besonders äußert.It should also be noted that the invention proves to be particularly advantageous in battery-operated electric hand tool devices, in particular those with a planetary gear, since the problem described at the outset is particularly pronounced here.

Weitere Merkmale, Einzelheiten der Vorteile der Erfindung ergeben sich aus den beigefügten Patentansprüchen und aus der zeichnerischen Darstellung und nachfolgenden Beschreibung der Erfindung. In der Zeichnung zeigt

die Figur
eine schematische Darstellung einer erfindungsgemäß ausgebildeten Sperr-/Freigabeeinrichtung für ein Handwerkzeuggerät.
Further features, details of the advantages of the invention will become apparent from the appended claims and from the drawings and the following description of the invention. In the drawing shows
The figure
a schematic representation of an inventively designed lock / release device for a hand tool.

Die einzige Figur verdeutlicht schematisch das Prinzip der erfindungsgemäß ausgebildeten Sperr-/Freigabeeinrichtung (Spindelarretierung) bei einem Handwerkzeuggerät. Schematisch angedeutet ist eine Spindel 2, an der ein nicht dargestelltes Werkzeugfutter zur Aufnahme eines Werkzeugs drehfest angeordnet werden kann. Die Spindel 2 stellt ein spindelseitiges Abtriebsteil dar oder ist drehfest und starr mit einem solchen spindelseitigen Abtriebsteil 4 verbunden. Zwischen Spindel 2 bzw. spindelseitigem Abtriebsteil 4 ist ein Klemmkörper 6 vorgesehen, der in einem Raum zwischen Spindel 2 und einem in Umfangsrichtung geschlossenen Bauteil 8, welches einen maschinenfesten Bremsring 10 bildet, aufgenommen ist. Mit dem Bezugszeichen 12 ist ein Maschinengehäuse oder eine Komponente des Maschinengehäuses des Werkzeuggeräts bezeichnet. Das als Bremsring 10 wirkende Bauteil 8 umfasst einen radialen Vorsprung 14, der in eine in Umfangsrichtung etwas größer ausgebildete Ausnehmung 16 des Maschinengehäuses 12 einragt. In radialer Richtung zwischen dem Vorsprung 14 und dem Maschinengehäuse 12 ist ein Dämpfungsmittel 18 aus einem elastomeren Material 20 vorgesehen. Das Dämpfungsmittel 18 ist in komplementär ausgeformten Ausnehmungen 22 in dem Vorsprung 20, bzw. 24 in dem Maschinengehäuse 12 aufgenommen. Es bildet eine beschränkt verformbare Kopplung zwischen dem Bauteil 8 und dem Maschinengehäuse 12. Wenn durch Anlaufen des Klemmkörpers 6 bei Einleitung eines Drehmoments von der Spindel 2 in Richtung auf den nicht dargestellten Antriebsmotor (Pfeil 26) ein Drehmoment auf das Bauteil 8 in Richtung des Pfeils 28 ausgeübt wird, so wird das Dämpfungsmittel 18 verformt und dabei auch auf Scherung beansprucht. Es lässt jedoch eine geringfügige Bewegung des Bauteils 28 in Richtung des Pfeils 28 zu. Eine solche geringfügige Bewegung wird jedoch durch in Umfangsrichtung wirksame Anschlagsflächen 30 zwischen dem Vorsprung 14 und der Ausnehmung 16 definitiv begrenzt.The single figure illustrates schematically the principle of the inventively embodied locking / releasing device (spindle lock) in a hand tool. Schematically indicated is a spindle 2, on which a tool chuck, not shown, for receiving a tool can be arranged rotationally fixed. The spindle 2 is a spindle-side driven part or is rotatably and rigidly connected to such a spindle-side driven part 4. Between spindle 2 and spindle-side output part 4, a clamping body 6 is provided which is received in a space between the spindle 2 and a circumferentially closed component 8, which forms a machine-fixed brake ring 10. Reference numeral 12 designates a machine housing or a component of the machine housing of the tool device. The component 8, which acts as a brake ring 10, comprises a radial projection 14 which is somewhat larger in a circumferential direction formed recess 16 of the machine housing 12 protrudes. In the radial direction between the projection 14 and the machine housing 12, a damping means 18 of an elastomeric material 20 is provided. The damping means 18 is received in complementary shaped recesses 22 in the projection 20, and 24 in the machine housing 12. It forms a limited deformable coupling between the component 8 and the machine housing 12. If by starting the clamping body 6 upon initiation of torque from the spindle 2 in the direction of the drive motor, not shown (arrow 26), a torque on the component 8 in the direction of the arrow 28 is exercised, the damping means 18 is deformed and thereby subjected to shear. However, it allows for a slight movement of the component 28 in the direction of the arrow 28. However, such slight movement is definitely limited by circumferentially effective abutment surfaces 30 between the projection 14 and the recess 16.

Durch die Vorsehung des Dämpfungsmittels 18 kann eine geräuscharme und weitgehend stoßfreie, jedoch gleichwohl sehr rasche Stillsetzung der Spindel erreicht werden.By the provision of the damping means 18, a quiet and largely shock-free, but nevertheless very rapid shutdown of the spindle can be achieved.

Claims (9)

  1. Motor-powered, including battery-powered, tool, in particular a hand tool, such as a drill, percussion drill, hammer drill or screwdriver, comprising a machine housing, a drive motor, and a shaft (2) which can be driven by the drive motor, a locking/release means being provided between the drive motor and the shaft (2) and comprising a drive component on the motor side, an output component (4) on the shaft side which component is connected integrally with or so as to be rotationally engaged with the shaft (2), and at least one clamp member (6), and comprising a chuck which can be connected to the shaft (2) for clamping a tool, the shaft (2) being able to be fixed relative to the machine housing (12) upon the introduction of a torque acting from the chuck in the direction towards the drive motor and being able to rotate freely relative to the machine housing (12) upon the introduction of a torque from the drive motor in the direction towards the shaft (2), the clamp member (6) running against a component (8) when the shaft (2) is fixed, said component being connected to the machine housing (12) via a damping means (18) which is deformable to a limited extent, characterised in that the component (8) comprises at least one shoulder (14), which extends in the radial direction, projects into a recess (16), formed so as to be slightly larger in the circumferential direction, of the machine housing (12), cooperates with the machine housing (12) in such a way as to delimit the rotation, and forms a hard stop (30) which acts in the circumferential direction and delimits the motion of the component (8) by coming into contact with the machine housing (12).
  2. Tool according to claim 1, characterised in that the component (8) can be rotated relative to the machine housing (12) in a delimited manner.
  3. Tool according to claim 2, characterised in that the component (8) can be rotated relative to the machine housing (12) in a manner delimited in both directions.
  4. Tool according to any one of claims 1 to 3, characterised in that the component (8) is annular.
  5. Tool according to any one of claims 2 to 4, characterised in that the component (8) is mounted in such a way as to be able to rotate in a manner delimited by the machine housing or a component of the machine housing (12).
  6. Tool according to any one of the preceding claims, characterised in that the damping means (18) comprises a rubber member (20).
  7. Tool according to any one of the preceding claims, characterised in that the damping means (18) has a Shore hardness of 30-80 Shore A.
  8. Tool according to any one of the preceding claims, characterised in that the damping means (18) is placed under shear strain during fixing.
  9. Tool according to any one of the preceding claims, characterised in that the damping means (18) is arranged between the component (8) and the machine housing (12) in a radial direction.
EP05750161A 2005-05-14 2005-05-14 Motor-driven machine-tool with a locking/releasing device for the spindle Not-in-force EP1881883B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/005308 WO2006122571A1 (en) 2005-05-14 2005-05-14 Motor-driven machine-tool with a locking/releasing device for the spindle

Publications (2)

Publication Number Publication Date
EP1881883A1 EP1881883A1 (en) 2008-01-30
EP1881883B1 true EP1881883B1 (en) 2009-04-29

Family

ID=35976773

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05750161A Not-in-force EP1881883B1 (en) 2005-05-14 2005-05-14 Motor-driven machine-tool with a locking/releasing device for the spindle

Country Status (6)

Country Link
EP (1) EP1881883B1 (en)
CN (1) CN101175610A (en)
AT (1) ATE430000T1 (en)
DE (1) DE502005007214D1 (en)
ES (1) ES2323426T3 (en)
WO (1) WO2006122571A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009060203A1 (en) * 2009-12-23 2011-06-30 Lucas Automotive GmbH, 56070 Assembly for an electromechanical brake actuator
DE102010043182A1 (en) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Portable machine tool
DE102011005812A1 (en) * 2011-03-18 2012-09-20 Robert Bosch Gmbh Machine tool braking device
CN104416545B (en) * 2013-08-23 2016-08-10 苏州宝时得电动工具有限公司 Electric tool termination connects adnexa and electric tool
EP3083156A4 (en) * 2013-12-20 2018-04-25 Black & Decker, Inc. Spindle lock assembly for power tool
CN105500296A (en) * 2015-12-31 2016-04-20 宁波中旺工具有限公司 Electric screw driver with vibration reduction separating piece

Family Cites Families (3)

* 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
JP2002137179A (en) * 2000-08-04 2002-05-14 Hitachi Koki Co Ltd Electric tool
US6702090B2 (en) * 2001-03-14 2004-03-09 Milwaukee Electric Tool Corporation Power tool and spindle lock system

Also Published As

Publication number Publication date
CN101175610A (en) 2008-05-07
ES2323426T3 (en) 2009-07-15
EP1881883A1 (en) 2008-01-30
ATE430000T1 (en) 2009-05-15
WO2006122571A1 (en) 2006-11-23
DE502005007214D1 (en) 2009-06-10

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