EP1293305B1 - Toolholder for Portable Percussion Tool - Google Patents

Toolholder for Portable Percussion Tool Download PDF

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Publication number
EP1293305B1
EP1293305B1 EP20020405708 EP02405708A EP1293305B1 EP 1293305 B1 EP1293305 B1 EP 1293305B1 EP 20020405708 EP20020405708 EP 20020405708 EP 02405708 A EP02405708 A EP 02405708A EP 1293305 B1 EP1293305 B1 EP 1293305B1
Authority
EP
European Patent Office
Prior art keywords
locking
axially
tool
arresting
radial
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
EP20020405708
Other languages
German (de)
French (fr)
Other versions
EP1293305A1 (en
Inventor
Rory Britz
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
Publication of EP1293305A1 publication Critical patent/EP1293305A1/en
Application granted granted Critical
Publication of EP1293305B1 publication Critical patent/EP1293305B1/en
Anticipated expiration legal-status Critical
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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0042—Ball-shaped locking members

Definitions

  • the invention relates to a tool holder for an at least partially punching hand tool such as a chisel hammer or a drill bit for receiving partially impacted tools such as percussion drill bit or chisel according to the preamble and as from EP 1 157 790 A1 , of the JP 2000 117662 and the DE 34 21 811 A1 known.
  • Such impacted tools usually have at least one axially limited on both sides locking groove in the tool shank, which allows for impact stress limited axial mobility of the tool within the tool holder as a clamping end.
  • DE3205063 engages an associated tool holder in this Verregelungsnut with radially displaceable locking elements and locks them via a user-friendly axially movable locking sleeve.
  • the locking elements are temporarily offset radially outward and release the tool shank for axial removal.
  • To remove the tool both hands of the user are required, whereby the hand tool, usually on the knee, must be discontinued.
  • DE3421811 is an axially movable VerriegelungshülsE about a hemversetzbares locking element axially locked and is locked automatically when inserting the replaced tool. In rotating hand tool devices, it can come with a lubversetzbaren locking element by engaging the tool holder to unintentional release of the lock.
  • the object of the invention is the realization of a tool holder for an at least partially rotating and beating hand tool, which securely locks the tool even with a rotating movement and allows the removal of the tool with one hand.
  • a tool holder for an at least partially rotating and beating hand tool for receiving a tool having a clamping end, which has at least one axially on both sides limited locking groove for radial engagement of a locking element, an axially displaceable locking sleeve for radial locking of the locking groove engaging in the locking elements and the locking sleeve on an axially lockable locking element.
  • the axially displaceable locking sleeve with two axially spaced disengagement positions for the temporary recording of the locking elements which are further advantageously designed as balls, executed during the removal or insertion of the tool, whereby without actuation of the sliding sleeve by hand insertion of the tool is made possible ,
  • each locking element located in the drive-side disengagement position is assigned a radially prestressed segment of the detent element, which causes each locking element to be pushed back into the locking groove after insertion of the insertion end into the tool receptacle.
  • the locking element is radially biased on a locking means axially latched, wherein further advantageously the locking element is designed as a leaf spring, which engages behind a racial locking lug as a locking means axially.
  • the locking element has a drive side inwardly angled nose, which displace the locking elements axially into the locking groove upon insertion of the changed tool, whereby the tool locks automatically.
  • the locking sleeve is axially positively connected to an axially displaceable by hand, freely rotatable sliding sleeve, whereby a torque transmission when attacking the tool holder is prevented.
  • a radially biased radial spring is advantageously arranged in the tool-side disengagement position, whereby after removal of the tool, the locking elements are pushed back radially inward.
  • FIG. 1 has a tool holder 1 for a rotating and beating hand tool 2 for receiving a tool 3 with a clamping end, which has two axially on both sides limited locking grooves 4.
  • the tool holder 1 also has an axially displaceable locking sleeve 5 for radially engaging in the locking groove 4 locking elements 6 in the form of balls and for the locking sleeve 5 an axially lockable latching element 7.
  • the designed as a leaf spring, radially biased locking element 7 engages behind an axially latchable designed as a radial locking lug locking means 8.
  • the locking sleeve 5 is axially positively connected to an axially displaceable by hand, freely rotatable sliding sleeve 9, which offset against the force of a spring 10 on the drive side.
  • Fig. 2 is the previously by hand by means of the sliding sleeve 9 against the force of the spring 10 drive side offset locking sleeve 5 locked in this position by the Ralstelement 7 axially on the locking means 8 by running the leaf spring Rastele nent 7 axially behind the locking means designed as a detent 8 eir engaged.
  • the locking elements 6 are temporarily displaced in the axial tool-side removal of the tool 3 by the drive-side boundary of the locking groove 4 in the tool-side disengaged position 11a of the locking sleeve 5 and press outward against a radially biased radial spring 12th

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)

Description

Die Erfindung bezeichnet eine Werkzeugaufnahme für ein zumindest teilweise chlagendes Handwerkzeuggerät wie einen Meisselhammer oder einen Bohrmeissel zur Aufnahme von teilweise schlagend beanspruchten Werkzeugen wie Schlagbohrmeissel oder Meissel gemäß dem Oberbegriff und wie aus der EP 1 157 790 A1 , der JP 2000 117662 und der DE 34 21 811 A1 bekannt.The invention relates to a tool holder for an at least partially punching hand tool such as a chisel hammer or a drill bit for receiving partially impacted tools such as percussion drill bit or chisel according to the preamble and as from EP 1 157 790 A1 , of the JP 2000 117662 and the DE 34 21 811 A1 known.

Derartige schlagend beanspruchte Werkzeuge weisen als Einspannende üblicherweise zumindest eine axial beidseitig begrenzte Verriegelungsnut im Werkzeugschaft auf, welche bei Schlagbeanspruchung eine begrenzte axiale Beweglichkeit des Werkzeuges innerhalb der Werkzeugaufnahme ermöglicht.Such impacted tools usually have at least one axially limited on both sides locking groove in the tool shank, which allows for impact stress limited axial mobility of the tool within the tool holder as a clamping end.

Nach der DE3205063 greift eine zugeordnete Werkzeugaufnahme in diese Verregelungsnut mit radial versetzbaren Verriegelungselementen ein und verriegelt diese über eine nutzerfreundlich axial bewegliche Verriegelungshülse. Zum Werkzeugwechsel werden die Verriegelungselemente temporär radial nach aussen versetzt und geben den Werkzeugschaft zur axialen Entnahme frei. Zur Entnahme des Werkzeugs werden beide Hände des Nutzers benötigt, wodurch das Handwerkzeuggerät, zumeist auf dem Knie, abgesetzt werden muss.After DE3205063 engages an associated tool holder in this Verregelungsnut with radially displaceable locking elements and locks them via a user-friendly axially movable locking sleeve. For tool change, the locking elements are temporarily offset radially outward and release the tool shank for axial removal. To remove the tool both hands of the user are required, whereby the hand tool, usually on the knee, must be discontinued.

Nach der DE19827172 werden die Verriegelungselemente mit einer axial gegen die Kraft einer Feder mittels einer frei drehbaren Schiebehülse axial versetzbaren Verriegelungshülse mit zwei axial beabstandeten Ausrückpositionen verriegelt, in welche die Verriegelungselemente versetzbar sind. Zur Werkzeugentnahme werden beide Hände des Nutzers benötigt.After DE19827172 the locking elements are locked with a axially against the force of a spring by means of a freely rotatable sliding sleeve axially displaceable locking sleeve with two axially spaced disengaging positions, in which the locking elements are displaceable. For tool removal both hands of the user are needed.

Nach der DE3421811 ist eine axial bewegliche VerriegelungshülsE über ein drehversetzbares Rastelement axial arretierbar und wird beim Einsetzen des gewechselten Werkzeugs selbsttätig verriegelt. Bei drehenden Handwerkzeuggeräten kann es bei einem drehversetzbaren Rastelement durch ein Angreifen an der Werkzeugaufnahme zu einem unbeabsichtigten Lösen der Arretierung kommen.After DE3421811 is an axially movable VerriegelungshülsE about a drehversetzbares locking element axially locked and is locked automatically when inserting the replaced tool. In rotating hand tool devices, it can come with a drehversetzbaren locking element by engaging the tool holder to unintentional release of the lock.

Die Aufgabe der Erfindung besteht in der Realisierung einer Werkzeugaufnahme für ein zumindest teilweise drehendes und schlagendes Handwerkzeuggerät, welche das Werkzeug auch bei drehender Bewegung sicher verriegelt sowie mit einer Hand die Entnahme des Werkzeuges ermöglicht.The object of the invention is the realization of a tool holder for an at least partially rotating and beating hand tool, which securely locks the tool even with a rotating movement and allows the removal of the tool with one hand.

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

Im wesentlichen weist eine Werkzeugaufnahme für ein zumindest teilweise drehendes und schlagendes Handwerkzeuggerät zur Aufnahme eines Werkzeugs mit einem Einspannende, welches zumindest eine axial beidseitig begrenzte Verriegelungsnut zum radialen Eingriff eines Verriegelungselements aufweist, eine axial versetzbare Verriegelungsshülse zur radialen Verriegelung der in die Verriegelungsnut eingreifenden Verriegelungselemente sowie für die Verriegelungshülse ein axial arretierbares Rastelement auf.Essentially, a tool holder for an at least partially rotating and beating hand tool for receiving a tool having a clamping end, which has at least one axially on both sides limited locking groove for radial engagement of a locking element, an axially displaceable locking sleeve for radial locking of the locking groove engaging in the locking elements and the locking sleeve on an axially lockable locking element.

Durch diesen axial bistabilen Klick-Klack-Mechanismus für die Verriegelungshülse wird stets nur eine Hand zum Wechsel der axialen Position der Verriegelungshülse benötigt, wodurch diese zwischenzeitlich zur Entnahme des Werkzeugs zur Verfügung steht.Due to this axially bistable click-click mechanism for the locking sleeve, only one hand is always required to change the axial position of the locking sleeve, whereby it is temporarily available for removal of the tool.

Erfindungsgemäß ist die axial versetzbare Verriegelungshülse mit zwei axial beabstandeten Ausrückpositionen für die temporäre Aufnahme der Verriegelungselemente, welche weiter vorteilhaft als Kugeln ausgebildet sind, bei der Entnahme bzw. dem Einsetzen des Werkzeugs ausgeführt, wodurch ohne Betätigung der Schiebehülse von Hand ein Einsetzen des Werkzeugs ermöglicht wird.According to the invention, the axially displaceable locking sleeve with two axially spaced disengagement positions for the temporary recording of the locking elements, which are further advantageously designed as balls, executed during the removal or insertion of the tool, whereby without actuation of the sliding sleeve by hand insertion of the tool is made possible ,

Erfindungsgemäß ist jedem in der antriebsseitigen Ausrückposition befindlichen Verriegelungselement ein radial vorgespanntes Segment des Rastelements zugeordnet, wodurch nach dem Einsetzen des Einsteckendes in die Werkzeugaufnahme jedes Verriegelungselement zurück in die Verriegelungsnut gedrängt wird.According to the invention, each locking element located in the drive-side disengagement position is assigned a radially prestressed segment of the detent element, which causes each locking element to be pushed back into the locking groove after insertion of the insertion end into the tool receptacle.

Vorteilhaft ist das Rastelement radial vorgespannt an einem Rastmittel axial rastbar, wobei weiter vorteilhaft das Rastelement als Blattfeder ausgeführt ist, welche eine racial Rastnase als Rastmittel axial hintergreift.Advantageously, the locking element is radially biased on a locking means axially latched, wherein further advantageously the locking element is designed as a leaf spring, which engages behind a racial locking lug as a locking means axially.

Vorteilhaft weist das Rastelement eine antriebsseitig nach innen abgewinkelte Nase auf, welche beim Einsetzen des gewechselten Werkzeugs die Verriegelungselemente axial in die Verriegelungsnut verdrängen, wodurch sich das Werkzeug selbsttätig verriegelt.Advantageously, the locking element has a drive side inwardly angled nose, which displace the locking elements axially into the locking groove upon insertion of the changed tool, whereby the tool locks automatically.

Vorteilhaft ist die Verriegelungshülse axial formschlüssig mit einer axial von Hand versetzbaren, frei drehbaren Schiebehülse verbunden, wodurch eine Drehmomentübertragung beim Angreifen an der Werkzeugaufnahme verhindert wird.Advantageously, the locking sleeve is axially positively connected to an axially displaceable by hand, freely rotatable sliding sleeve, whereby a torque transmission when attacking the tool holder is prevented.

Vorteilhaft ist in der werkzeugseitigen Ausrückposition eine radial vorgespannte Radialfeder angeordnet, wodurch nach der Entnahme des Werkzeuges die Verriegelungselemente zurück nach radial innen gedrängt werden.A radially biased radial spring is advantageously arranged in the tool-side disengagement position, whereby after removal of the tool, the locking elements are pushed back radially inward.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit:

  • Fig. 1 als Werkzeugaufnahme im Winkelschnitt
  • Fig. 2 als Detail bei der Entnahme des Werkzeugs
  • Fig. 3 als Detail beim Einsetzen des Werkzeugs
The invention will be explained in more detail with respect to an advantageous embodiment with:
  • Fig. 1 as a tool holder in angled section
  • Fig. 2 as a detail when removing the tool
  • Fig. 3 as a detail when inserting the tool

Nach Fig. 1 weist eine Werkzeugaufnahme 1 für ein drehendes und schlagendes Handwerkzeuggerät 2 zur Aufnahme eines Werkzeugs 3 mit einem Einspannende, welches zwei axial beidseitig begrenzte Verriegelungsnuten 4 aufweist. Die Werkzeugaufnahme 1 weist zudem eine axial versetzbare Verriegelungshülse 5 für radial in die Verriegelungsnut 4 eingreifende Verriegelungselemente 6 in Form von Kugeln sowie für die Verriegelungshülse 5 ein axial arretierbares Rastelement 7 auf. Das als Blattfeder ausgeführte, radial vorgespannte Rastelement 7 hintergreift axial rastbar ein als radiale Rastnase ausgeführtes Rastmittel 8. Die Verriegelungshülse 5 ist axial formschlüssig mit einer axial von Hand versetzbaren, frei drehbaren Schiebehülse 9 verbunden, welche gegen die Kraf einer Feder 10 antriebsseitig versetzt.To Fig. 1 has a tool holder 1 for a rotating and beating hand tool 2 for receiving a tool 3 with a clamping end, which has two axially on both sides limited locking grooves 4. The tool holder 1 also has an axially displaceable locking sleeve 5 for radially engaging in the locking groove 4 locking elements 6 in the form of balls and for the locking sleeve 5 an axially lockable latching element 7. The designed as a leaf spring, radially biased locking element 7 engages behind an axially latchable designed as a radial locking lug locking means 8. The locking sleeve 5 is axially positively connected to an axially displaceable by hand, freely rotatable sliding sleeve 9, which offset against the force of a spring 10 on the drive side.

Nach Fig. 2 ist die zuvor von Hand mittels der Schiebehülse 9 gegen die Kraft der Feder 10 antriebsseitig versetzte Verriegelungshülse 5 in dieser Position durch das Ralstelement 7 axial am Rastmittel 8 arretiert, indem das als Blattfeder ausgeführte Rastele nent 7 axial hinter dem als radiale Rastnase ausgeführten Rastmittel 8 eir rastet. Die Verriegelungselemente 6 werden bei der axialen werkzeugseitigen Entnahme des Werkzeuges 3 durch die antriebsseitige Begrenzung der Verriegelungsnut 4 temporär in die werkzeugseitige Ausrückposition 11a der Verriegelungshülse 5 verdrängt und drücken nach aussen gegen eine radial vorgespannte Radialfeder 12.To Fig. 2 is the previously by hand by means of the sliding sleeve 9 against the force of the spring 10 drive side offset locking sleeve 5 locked in this position by the Ralstelement 7 axially on the locking means 8 by running the leaf spring Rastele nent 7 axially behind the locking means designed as a detent 8 eir engaged. The locking elements 6 are temporarily displaced in the axial tool-side removal of the tool 3 by the drive-side boundary of the locking groove 4 in the tool-side disengaged position 11a of the locking sleeve 5 and press outward against a radially biased radial spring 12th

Nach Fig. 3 verdrängt beim Einsetzen die antriebsseitige Begrenzung des Werkzeuges 3 die Verriegelungselemente 6 temporär in die antriebsseitige Ausrückposition 11b der Verriegelungshülse 5. Jedes einzelne Verriegelungselement 6 drückt gegen die radiale Vorspannung eines radial vorgespannten Segments 13 des Rastelements 7, hebt das Rastelement 7 radial über das Rastmittel 8 hinaus und entarretiert die Verriegelungshülse 5, welche selbsttätig durch die Feder 10 werkzeugseitig versetzt wird. Eine antriebsseitig nach innen abgewinkelte Nase 14 drängt das Verriegelungselement 6 werkzeugseitig axial in die Verriegelungsnut 4.To Fig. 3 displaced when inserting the drive-side boundary of the tool 3, the locking elements 6 temporarily in the drive-side disengagement position 11b of the locking sleeve 5. Each locking element 6 presses against the radial Preload a radially biased segment 13 of the locking element 7, the locking element 7 lifts radially beyond the locking means 8 and unlocks the locking sleeve 5, which is automatically offset by the tool 10 on the tool side. A drive side inwardly angled nose 14 urges the locking element 6 tool side axially into the locking groove 4th

Claims (4)

  1. A toolholder for an at least partially rotating and percussive hand tool device (2) for receiving a tool (3) with a clamping end, which has at least one locking nut (4) axially limited on both sides for the radial engagement of a locking element (6), with an axially displaceable locking sleeve (5) for the radial locking of the locking element (6) engaging in the locking groove (4), wherein the locking sleeve (5) has an axially lockable stop element (7), characterised in that
    the axially displaceable locking sleeve (5) is constructed with two axially spaced disengagement positions (11a; 11b) for the temporary receiving of the locking element (6), in that a radially pretensioned segment (13) of the arresting element (7) is assigned to each locking element (6) that is in the drive-side disengagement position (11b), and in that the arresting element (7), radially pretensioned, can be axially engaged on an arresting means (8) and optionally axially undercuts a radial arresting nose as a leaf spring.
  2. The toolholder according to Claim 1, characterised in that the arresting element 97) has at least one axially resilient nose (14) that is inwardly angled on the drive side, which nose is assigned to the locking element (6).
  3. The toolholder according to any one of Claims 1 or 2, characterised in that the locking sleeve (5) is connected axially and positively to a freely rotatable sliding sleave (9) that is axially displaceable by hand.
  4. The toolholder according to Claim 3, characterised in that a radially pretensioned radial spring (12) is assigned to the tool-side disengaging position (11a).
EP20020405708 2001-08-31 2002-08-20 Toolholder for Portable Percussion Tool Expired - Lifetime EP1293305B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001142729 DE10142729A1 (en) 2001-08-31 2001-08-31 Tool holder for striking hand tool device
DE10142729 2001-08-31

Publications (2)

Publication Number Publication Date
EP1293305A1 EP1293305A1 (en) 2003-03-19
EP1293305B1 true EP1293305B1 (en) 2010-04-28

Family

ID=7697279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020405708 Expired - Lifetime EP1293305B1 (en) 2001-08-31 2002-08-20 Toolholder for Portable Percussion Tool

Country Status (2)

Country Link
EP (1) EP1293305B1 (en)
DE (2) DE10142729A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020213165A1 (en) 2020-10-19 2022-04-21 Robert Bosch Gesellschaft mit beschränkter Haftung Hand tool machine with a locking device
DE102021203063A1 (en) * 2021-03-26 2022-09-29 Robert Bosch Gesellschaft mit beschränkter Haftung Hand tool machine with a locking device
DE102021203064A1 (en) * 2021-03-26 2022-09-29 Robert Bosch Gesellschaft mit beschränkter Haftung Hand tool machine with a locking device

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788658A (en) * 1972-08-14 1974-01-29 Erickson Tool Co Instant change tool holder
DE2618596C2 (en) * 1976-04-28 1984-05-17 Robert Bosch Gmbh, 7000 Stuttgart Tool holder
DE3205063C2 (en) 1981-04-03 1986-10-09 Robert Bosch Gmbh, 7000 Stuttgart Tool holder
DE3421811C2 (en) 1984-06-12 1995-11-16 Hilti Ag Tool holder for drilling and chiseling tools
DE4136608A1 (en) * 1991-11-07 1993-05-13 Licentia Gmbh TOOL RECEIVER FOR A HAND MACHINE TOOL
DE19525915B4 (en) * 1995-07-04 2004-10-28 Black & Decker Inc., Newark Rotary Hammer
JP3423497B2 (en) * 1995-09-06 2003-07-07 株式会社マキタ Bit mounting device for portable tools
DE19827172B4 (en) 1998-06-18 2006-11-09 Robert Bosch Gmbh Tool holders, in particular for drills or impact hammers
JP3759322B2 (en) 1998-10-08 2006-03-22 株式会社マキタ Bit mounting device for portable tools
DE19950393B4 (en) * 1999-10-12 2013-07-11 Black & Decker, Inc. Tool holder for a drill or chisel hammer
DE10001193B4 (en) * 2000-01-14 2005-10-20 Bosch Gmbh Robert Hand tool with a tool holder for fixing the tool in the direction of rotation
DE10026021A1 (en) 2000-05-25 2001-11-29 Hilti Ag Tool holder for a drill bit

Also Published As

Publication number Publication date
DE50214394D1 (en) 2010-06-10
EP1293305A1 (en) 2003-03-19
DE10142729A1 (en) 2003-03-20

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