EP0768150B1 - Tool holder - Google Patents

Tool holder Download PDF

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Publication number
EP0768150B1
EP0768150B1 EP96810256A EP96810256A EP0768150B1 EP 0768150 B1 EP0768150 B1 EP 0768150B1 EP 96810256 A EP96810256 A EP 96810256A EP 96810256 A EP96810256 A EP 96810256A EP 0768150 B1 EP0768150 B1 EP 0768150B1
Authority
EP
European Patent Office
Prior art keywords
tool
tool holder
toolholder
tools
locking
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
EP96810256A
Other languages
German (de)
French (fr)
Other versions
EP0768150A1 (en
Inventor
Hans-Werner Bongers-Ambrosius
Jörg Eichhorn
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 EP0768150A1 publication Critical patent/EP0768150A1/en
Application granted granted Critical
Publication of EP0768150B1 publication Critical patent/EP0768150B1/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
    • B25D2217/0034—Details of shank profiles
    • 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
    • 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
    • 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
    • B25D2217/0049—Roll-shaped locking members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/355—Use of rolls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y10T279/17076—Spreading elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17666—Radially reciprocating jaws
    • Y10T279/17692—Moving-cam actuator
    • Y10T279/17743—Reciprocating cam sleeve
    • Y10T279/17752—Ball or roller jaws
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank

Definitions

  • the invention relates to a tool holder for tools that have at least one axially closed locking groove and at least one towards the rear end have open rotary driving groove, with at least one in a receiving sleeve Locking element for the locking groove mounted radially and at least one driver is arranged for the rotary driving groove.
  • a tool holder for Hand-held machine tools are known, with tools in the tool holder Let insert, for example, two axially closed locking grooves and have two rotary driving grooves open towards the rear face.
  • This Hand machine tools thus transfer to that used in the tool holder Tools such as drills or chisels usually both turn and one Stroke movement.
  • the tool holder must therefore be designed so that it on the one hand can transfer torques to the tool and on the other hand that Tool axially displaceable, but in such a way that it does not come out of the Tool holder falls out.
  • the known tool holder for the axial holding of the tools in a receptacle radially displaceable Locking elements on which in the axially closed locking grooves Intervene tools.
  • two are diametrically opposed to each other opposing locking elements provided in the form of balls. Because of the length of the locking grooves exceeding the locking elements is the limited axial displacement of the tools while rolling the balls in the Locking grooves ensured.
  • drivers are provided in the receiving sleeve, for example in the form of two opposite strips. These carriers reach into the rotary driving grooves in the Tools.
  • Tool holder for tools the two diametrically opposite, axially have closed locking grooves are from DE-A-28 34 991 and from DE-A-33 28 886 known. At least one ball protrudes into each of these locking grooves a receiving sleeve is arranged radially displaceable. These balls serve the axial Holder of the tool in the tool holder and the torque transmission.
  • the object is achieved in that the driver of at least a cylindrical roller body is formed during an axial displacement a tool in the tool holder, along a parallel to the main axis of the Rolls receptacle extending level.
  • the number of rolling elements to be provided depends in particular on the dimensioning of Tool and tool holder.
  • the rolling elements can be loose in the Receiving sleeve of the tool holder, or it can - like this from the area of rolling bearings is known - a cage for holding and mutual Distance arrangement of the rolling elements may be provided.
  • a tool 1 which two each other diametrically opposite, axially closed locking grooves 2 and two diametrically opposite, open towards the rear end Has rotary driving grooves 3.
  • the axial holding of the tool 1 serve locking elements 4 in the form of Balls, which are arranged radially displaceably in a receiving sleeve 5.
  • Means of a sliding actuating ring 6, for example, which in turn is driven by a Cage 7 is surrounded, can be niches in the radial projection range Bring locking elements 4 so that to remove the tool 1 Locking elements 4 can move out of the locking grooves 2.
  • the radial displaceability of the locking elements 4 is ensured by the in the openings 5a provided in the receiving sleeve 5.
  • Carriers 8 are used for the transmission of the torque in the form of cylinders, which are stored in recesses 5b of the receiving sleeve 5.
  • the drivers 8 engage in the Driving grooves 3 of the tool 1.
  • a tool 11 is inserted in the tool holder according to FIG diametrically opposite two axially closed locking grooves 12 and two diametrically opposed to each other, open towards the rear side of the voice Has rotary driving grooves 13.
  • the axial holding of the tool 11 serve in Locking elements 14 present in the form of balls, which in openings 15a Receiving sleeve 15 are mounted radially.
  • an actuating sleeve 1b surrounding the receiving sleeve 15, which in turn is provided by is surrounded by a cage 17, niches in the radial projection area of the Bring locking elements 14, in which the locking elements 14 to Removal of the tool 11 can avoid.
  • drivers 18 For the transmission of torque to the tool 11 are drivers 18 in the form of Bullets provided.
  • the drivers 18 act with the towards the rear end side open rotary driving grooves 13 together and are mounted in recesses 15b. Due to the friction-reducing rolling of the driver 18 to the for Torque transmission relevant areas will become harmful effective wear both on the tool 11 and on parts of the Tool holder avoided.

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

Description

Die Erfindung betrifft einen Werkzeughalter für Werkzeuge, die wenigstens eine axial geschlossene Verriegelungsnut und wenigstens eine zur rückwärtigen Stimseite hin offene Drehmitnahmenut aufweisen, wobei in einer Aufnahmehülse wenigstens ein Verriegelungselement für die Verriegelungsnut radial verschiebbar gelagert und wenigstens ein Mitnehmer für die Drehmitnahmenut angeordnet ist.The invention relates to a tool holder for tools that have at least one axially closed locking groove and at least one towards the rear end have open rotary driving groove, with at least one in a receiving sleeve Locking element for the locking groove mounted radially and at least one driver is arranged for the rotary driving groove.

Beispielsweise aus der DE-PS 25 51 125 ist ein Werkzeughalter für Handwerkzeugmaschinen bekannt, wobei sich in den Werkzeughalter Werkzeuge einsetzen lassen, die beispielsweise zwei axial geschlossene Verriegelungsnuten und zwei zur rückwärtigen Stimseite hin offene Drehmitnahmenuten aufweisen. Bei den hier vor allem in Betracht kommenden Handwerkzeugmaschinen handelt es sich überwiegend um Bohrhämmer, Kombihämmer und Meisselhämmer. Diese Handwerkzeugmaschinen übertragen damit auf das im Werkzeughalter eingesetzte Werkzeug wie Bohrer oder Meissel zumeist sowohl eine Dreh- als auch eine Schlagbewegung. Der Werkzeughalter muss damit derart ausgelegt sein, dass er einerseits Drehmomente auf das Werkzeug übertragen kann und andererseits das Werkzeug axial verschieblich aufnimmt, aber derart, dass es nicht aus der Werkzeugaufnahme herausfällt.For example from DE-PS 25 51 125 is a tool holder for Hand-held machine tools are known, with tools in the tool holder Let insert, for example, two axially closed locking grooves and have two rotary driving grooves open towards the rear face. The ones here it is mainly considered handheld machine tools mainly around rotary hammers, combination hammers and chisel hammers. This Hand machine tools thus transfer to that used in the tool holder Tools such as drills or chisels usually both turn and one Stroke movement. The tool holder must therefore be designed so that it on the one hand can transfer torques to the tool and on the other hand that Tool axially displaceable, but in such a way that it does not come out of the Tool holder falls out.

Um die obigen Anforderungen zu erfüllen, weist der bekannte Werkzeughalter für die axiale Halterung der Werkzeuge in einer Aufnahmehülse radial verschiebbare Verriegelungselemente auf, welche in die axial geschlossenen Verriegelungsnuten der Werkzeuge eingreifen. Im vorliegenden bekannten Beispiel sind zwei einander diametral gegenüberliegende Verriegelungselemente in Form von Kugeln vorgesehen. Aufgrund der die Verriegelungselemente übersteigenden Länge der Verriegelungsnuten ist die begrenzte axiale Verschiebbarkeit der Werkzeuge unter Abwälzen der Kugeln in den Verriegelungsnuten sichergestellt.In order to meet the above requirements, the known tool holder for the axial holding of the tools in a receptacle radially displaceable Locking elements on which in the axially closed locking grooves Intervene tools. In the present known example, two are diametrically opposed to each other opposing locking elements provided in the form of balls. Because of the length of the locking grooves exceeding the locking elements is the limited axial displacement of the tools while rolling the balls in the Locking grooves ensured.

Zur Übertragung des Drehmomentes sind in der Aufnahmehülse Mitnehmer vorgesehen, beispielsweise in Form von zwei einander gegenüberliegenden Leisten. Diese Mitnehmer greifen in die zur rückwärtigen Stimseite hin offenen Drehmitnahmenuten in den Werkzeugen ein.To transmit the torque, drivers are provided in the receiving sleeve, for example in the form of two opposite strips. These carriers reach into the rotary driving grooves in the Tools.

Wie bereits darauf hingewiesen, ist es insbesondere im Zusammenhang mit der von den Handwerkzeugmaschinen auf die Werkzeuge abgegebenen Schlagbewegungen erforderlich, dass die Werkzeuge im Werkheughalter begrenzt axial verschiebbar gelagert sind. Im Betrieb erfolgt somit eine laufende Relatiwerschiebung zwischen Werkzeug und Werkzeughalter. Nachdem die für die Übertragung des Drehmomentes massgebenden Mitnehmer Teil der Aufnahmehülse sind, erfolgt eine Relatiwerschiebung zwischen dem Werkzeug und den Mitnehmem, wobei zusätzlich noch das Drehmoment auf die Mitnehmer einwirkt. Somit entsteht an den Berührungsflächen zwischen Mitnehmer und Werkzeug eine ausserordentlich hohe Reibung, welche zu einem starken Verschleiss sowohl der Mitnehmer als auch der entsprechenden Bereiche am Werkzeug führt. Ein vorzeitiger Ausfall des Werkzeuges sowie ein unverhältnismässig grosser Verschleiss am Werkzeughalter ist die Folge davon.As already pointed out, it is particularly in connection with that of the Hand machine tools on the tools emitted blows required that the tools in the tool holder can be moved axially to a limited extent are stored. During operation, there is a constant shift in the relativity between Tool and tool holder. After that for the transmission of the torque decisive drivers are part of the receiving sleeve, there is a Relative shift between the tool and the drivers, with additional the torque still acts on the drivers. Thus arises at the Contact areas between the driver and the tool are extremely high Friction, which leads to heavy wear on both the driver and the corresponding areas on the tool. An early failure of the tool as well as a disproportionate amount of wear on the tool holder from that.

Aus der DE-A-37 14 679 ist ein Werkzeughalter für Werkzeuge mit zwei axial geschlossenen Verriegelungsnuten und zwei Drehmitnahmenuten, die zu einem rückwärtigen Ende des Werkzeuges hin offen ausgebildet sind, bekannt. In einer Aufnahmehülse sind zwei einander diametral gegenüberliegende Verriegelungselemente und zwei einander ebenfalls diameteral gegenüberliegende Mitnehmer radial versetzbar angeordnet. Sowohl die Verriegelungselemente als auch die Mitnehmer weisen eine zylindrische Aussenkontur auf und sind in der Aufnahmehülse in der Weise angeordnet, dass deren Längsachsen parallel zur Längsachse des Werkzeughalters verläuft.From DE-A-37 14 679 is a tool holder for tools with two axially closed Locking grooves and two rotary driving grooves that lead to a rear end of the Tool open are known. In a receptacle, two are each other diametrically opposite locking elements and two diametrically opposed to each other opposite drivers arranged radially displaceable. Both the Locking elements as well as the drivers have a cylindrical outer contour and are arranged in the receiving sleeve in such a way that their longitudinal axes are parallel runs to the longitudinal axis of the tool holder.

Werkzeughalter für Werkzeuge, die zwei einander diametral gegenüberliegende, axial geschlossene Verriegelungsnuten aufweisen, sind aus der DE-A-28 34 991 und aus der DE-A-33 28 886 bekannt. In jede dieser Verriegelungsnuten ragt wenigstens eine Kugel, die in einer Aufnahmehülse radial versetzbar angeordnet ist. Diese Kugeln dienen der axialen Halterung des Werkzeuges in dem Werkzeughalter und der Drehmomentübertragung.Tool holder for tools, the two diametrically opposite, axially have closed locking grooves are from DE-A-28 34 991 and from DE-A-33 28 886 known. At least one ball protrudes into each of these locking grooves a receiving sleeve is arranged radially displaceable. These balls serve the axial Holder of the tool in the tool holder and the torque transmission.

Es ist demnach Aufgabe der vorliegenden Erfindung, einen Werkzeughalter für Handwerkzeugmaschinen der genannten Art zu schaffen, mit welchem ein schädlicher Verschleiss sowohl am Werkzeug als auch am Werkzeughalter vermeidbar ist.It is therefore an object of the present invention to provide a tool holder for To create hand tools of the type mentioned, with which a harmful Wear on both the tool and the tool holder can be avoided.

Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass der Mitnehmer von wenigstens einem zylindrischen Wälzkörper gebildet ist der sich, während einer axialen Verschiebung eines Werkzeugs im Werkzeughalter, entlang einer sich parallel zur Hauptachse der Aufnahmehülse verlaufenden Ebene abwälzt.According to the invention the object is achieved in that the driver of at least a cylindrical roller body is formed during an axial displacement a tool in the tool holder, along a parallel to the main axis of the Rolls receptacle extending level.

Mit einem als Wälzkörper ausgebildeten Mitnehmer wird einerseits die Übertragung des Drehmomentes sichergestellt, andererseits aber jegliche zu einem Verschleiss führende Reibung bei der Relatiwerschiebung zwischen Werkzeug und Werkzeughalter Vermindert Sowohl am Werkzeug als auch am Werkzeughalter tritt damit der nachteilige, reibungsbedingte Verschleiss nicht auf.With a driver designed as a rolling element, the transmission of the Torque ensured, but on the other hand any lead to wear Friction during the relative shift between tool and tool holder The disadvantageous, both on the tool and on the tool holder frictional wear does not show up.

Insbesondere im Zusammenhang mit der Übertragung grösserer Drehmomente bietet sich die Ausbildung der Wälzkörper als Zylinder an. Auch hier besteht die Möglichkeit, mehrere solcher als Zylinder ausgebildeter Wälzkörper hintereinander anzuordnen.Especially in Training is offered in connection with the transmission of higher torques the rolling element as a cylinder. There is also the possibility of several such as Arrange cylinders of trained rolling elements one behind the other.

Insbesondere im Zusammenhang mit der Übertragung grösserer Drehmomente wirkt es sich vorteilhaft aus, wenn als Mitnehmer mehrere Wälzkörper hintereinander entlang der parallel zur Aufnahmehülse verlaufenden Ebene angeordnet sind. Die Anzahl der vorzusehenden Wälzkörper richtet sich insbesondere nach der Dimensionierung von Werkzeug und Werkzeughalter. Dabei können die Wälzkörper lose in der Aufnahmehülse des Werkzeughalters aufgenommen sein, oder es kann - wie dies aus dem Gebiet der Wälzlager bekannt ist - ein Käfig zur Halterung und gegenseitigen Abstandanordnung der Wälzkörper vorgesehen sein.It works particularly in connection with the transmission of higher torques is advantageous if several rolling elements in succession along the are arranged parallel to the receiving sleeve plane. The number of rolling elements to be provided depends in particular on the dimensioning of Tool and tool holder. The rolling elements can be loose in the Receiving sleeve of the tool holder, or it can - like this from the area of rolling bearings is known - a cage for holding and mutual Distance arrangement of the rolling elements may be provided.

Im Hinblick auf die weit verbreitete Art der Werkzeuge, wo diametral zwei einander gegenüberliegende Drehmitnahmenuten vorgesehen sind, kann zweckmässigerweise der Werkzeughalter im wesentlichen diametral gegenüberliegend zwei von wenigstens einem Wälzkörper gebildete Mitnehmer aufweisen. Dabei können die Mitnehmer wiederum von einem oder von mehreren hintereinander angeordneten Wälzkörpem gebildet sein.

Fig. 1
einen Schnitt durch einen schematisch dargestellten Werkzeughalter mit Wälzkörpern in Form von Zylindern;
Fig. 2
einen Schnitt durch einen schematisch dargestellten Werkzeughalter mit Wälzkörpern in Form von Kugeln. Figur 2 stellt keine Ausführungsform der Erfindung dar.
In view of the widespread type of tools, where diametrically opposed two rotary driving grooves are provided, the tool holder can expediently have two drivers formed by at least one rolling element, essentially diametrically opposite. The drivers can in turn be formed by one or more rolling elements arranged one behind the other.
Fig. 1
a section through a schematically illustrated tool holder with rolling elements in the form of cylinders;
Fig. 2
a section through a schematically illustrated tool holder with rolling elements in the form of balls. Figure 2 does not represent an embodiment of the invention.

Im Werkzeughalter gemäss Fig. 1 ist ein Werkzeug 1 eingesetzt, welches zwei einander diametral gegenüberliegende, axial geschlossene Verriegelungsnuten 2 und zwei einander diametral gegenüberliegende, zur rückwärtigen Stirnseite hin offene Drehmitnahmenuten 3 aufweist.1, a tool 1 is used, which two each other diametrically opposite, axially closed locking grooves 2 and two diametrically opposite, open towards the rear end Has rotary driving grooves 3.

Der axialen Halterung des Werkzeuges 1 dienen Verriegelungselemente 4 in Form von Kugeln, welche radial verschiebbar in einer Aufnahmehülse 5 angeordnet sind. Mittels eines beispielsweise verschiebbaren Betätigungsringes 6, der seinerseits von einem Käfig 7 umgeben ist, lassen sich Nischen in den radialen Projektionsbereich der Verriegelungselemente 4 bringen, so dass zum Entfernen des Werkzeuges 1 die Verriegelungselemente 4 aus den Verriegelungsnuten 2 herausrücken können. Sichergestellt wird die radiale Verschiebbarkeit der Verriegelungselemente 4 durch die in der Aufnahmehülse 5 vorgesehenen Durchbrüche 5a. The axial holding of the tool 1 serve locking elements 4 in the form of Balls, which are arranged radially displaceably in a receiving sleeve 5. Means of a sliding actuating ring 6, for example, which in turn is driven by a Cage 7 is surrounded, can be niches in the radial projection range Bring locking elements 4 so that to remove the tool 1 Locking elements 4 can move out of the locking grooves 2. The radial displaceability of the locking elements 4 is ensured by the in the openings 5a provided in the receiving sleeve 5.

Der Übertragung des Drehmomentes dienen Mitnehmer 8 in Form von Zylindern, welche in Ausnehmungen 5b der Aufnahmehülse 5 gelagert sind. Die Mitnehmer 8 greifen in die Drehmitnahmenuten 3 des Werkzeuges 1 ein.Carriers 8 are used for the transmission of the torque in the form of cylinders, which are stored in recesses 5b of the receiving sleeve 5. The drivers 8 engage in the Driving grooves 3 of the tool 1.

Aufgrund der Ausbildung der Mitnehmer 8 als Zylinder erfolgt an den für die Übertragung des Drehmomentes massgebenden Bereichen eine Verringerung der Reibung durch ein Abrollen der Mitnehmer 8 an den entsprechenden Bereichen.Due to the design of the driver 8 as a cylinder takes place for the transmission of the torque-determining areas, a reduction in friction by rolling off the Driver 8 at the corresponding areas.

Im Werkzeughalter entsprechend Fig. 2 ist ein Werkzeug 11 eingesetzt, welches diametral gegenüberliegend zwei axial geschlossene Verriegelungsnuten 12 und zwei einander diametral gegenüberliegende, zur rückwärtigen Stimseite hin offene Drehmitnahmenuten 13 aufweist. Der axialen Halterung des Werkzeuges 11 dienen in Form von Kugeln vorliegende Verriegelungselemente 14, die in Durchbrüchen 15a einer Aufnahmehülse 15 radial verschiebbar gelagert sind. Beispielsweise durch Verschieben einer die Aufnahmehülse 15 umgebenden Betätigungshülse 1b, welche ihrerseits von einem Käfig 17 umgeben ist, lassen sich Nischen in den radialen Projektionsbereich der Verriegelungselemente 14 bringen, in welche die Verriegelungselemente 14 zur Entnahme des Werkzeuges 11 ausweichen können.A tool 11 is inserted in the tool holder according to FIG diametrically opposite two axially closed locking grooves 12 and two diametrically opposed to each other, open towards the rear side of the voice Has rotary driving grooves 13. The axial holding of the tool 11 serve in Locking elements 14 present in the form of balls, which in openings 15a Receiving sleeve 15 are mounted radially. For example, by moving it an actuating sleeve 1b surrounding the receiving sleeve 15, which in turn is provided by is surrounded by a cage 17, niches in the radial projection area of the Bring locking elements 14, in which the locking elements 14 to Removal of the tool 11 can avoid.

Zur Drehmomentübertragung auf das Werkzeug 11 sind Mitnehmer 18 in Form von Kugeln vorgesehen. Die Mitnehmer 18 wirken mit den zur rückwärtigen Stimseite hin offenen Drehmitnahmenuten 13 zusammen und sind in Ausnehmungen 15b gelagert. Aufgrund des eine Reibung Vermindernden Abwälzens der Mitnehmer 18 an den für die Drehmomentübertragung massgebenden Bereichen wird ein sich schädlich auswirkender Verschleiss sowohl am Werkzeug 11 als auch an Teilen des Werkzeughalters vermieden.For the transmission of torque to the tool 11 are drivers 18 in the form of Bullets provided. The drivers 18 act with the towards the rear end side open rotary driving grooves 13 together and are mounted in recesses 15b. Due to the friction-reducing rolling of the driver 18 to the for Torque transmission relevant areas will become harmful effective wear both on the tool 11 and on parts of the Tool holder avoided.

Claims (3)

  1. Toolholder for tools (1, 11) having at least one axially closed locking groove (2, 12) and at least one rotary slaving groove (3, 13) open towards the rear end face, at least one locking element (4, 14) for the locking groove (2, 12) being mounted in a locator sleeve (5, 15) in a radially displaceable manner and at least one driving dog (8, 18) for the rotary slaving groove (3, 13) being disposed, the locking element (4, 14) and the driving dog (8, 18) being different components of the toolholder,
    characterised in that the driving dog (8, 18) is constituted by at least one cylindrical rolling member which, during an axial displacement of a tool in the toolholder, rolls off along a plane running parallel to the principal axis of the locator sleeve (5, 15).
  2. Toolholder according to claim 1, characterised in that as driving dogs (8, 18) a plurality of rolling members are arranged one behind the other along the plane running parallel to the principal axis of the locator sleeve (5, 15).
  3. Toolholder according to claim 1 or 2, characterised by providing, substantially diametrically opposed to one another, two driving dogs (8, 18) constituted by at least one rolling member.
EP96810256A 1995-10-09 1996-04-22 Tool holder Expired - Lifetime EP0768150B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19537560A DE19537560A1 (en) 1995-10-09 1995-10-09 Tool holder
DE19537560 1995-10-09

Publications (2)

Publication Number Publication Date
EP0768150A1 EP0768150A1 (en) 1997-04-16
EP0768150B1 true EP0768150B1 (en) 2001-04-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810256A Expired - Lifetime EP0768150B1 (en) 1995-10-09 1996-04-22 Tool holder

Country Status (6)

Country Link
US (1) US5700018A (en)
EP (1) EP0768150B1 (en)
JP (1) JP4025381B2 (en)
CN (1) CN1067931C (en)
DE (2) DE19537560A1 (en)
DK (1) DK0768150T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19958342C2 (en) * 1999-12-03 2001-10-18 Bosch Gmbh Robert Rotating tool holder
US6688610B2 (en) 2000-05-12 2004-02-10 Power Tool Holders Incorporated Chuck with quick change
US6533291B2 (en) 2001-02-14 2003-03-18 Power Tool Holders Incorporated Chuck having quick change mechanism
US6834864B2 (en) 2001-10-24 2004-12-28 Power Tool Holders Incorporated Chuck having quick change mechanism
GB2395158B (en) * 2002-11-14 2005-11-16 Black & Decker Inc Tool holder for a rotary hammer
ATE460255T1 (en) * 2003-11-26 2010-03-15 Hilti Ag TOOL HOLDER FOR A ROTATING AND IMPACTING TOOL
DE102004054685A1 (en) * 2004-11-12 2006-05-18 Hilti Ag tool holder

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834991A1 (en) * 1978-08-10 1980-02-14 Joran Bor A S Hammer or percussion drill type tool holder - has interfacing coupling balls engaging pressure face in peripheral groove
SU1010262A1 (en) * 1981-03-11 1983-04-07 Кыштымский машиностроительный завод им.М.И.Калинина Apparatus for coupling drill crown with submersible percussive mechanism
SU985274A1 (en) * 1981-08-03 1982-12-30 Кыштымский машиностроительный завод им.М.И.Калинина Apparatus for connecting crown bit with submersible percussive mechanism
JPS5930607A (en) * 1982-08-12 1984-02-18 Hitachi Koki Co Ltd Electric hammer drill
DE3539912A1 (en) * 1985-11-11 1987-05-14 Hilti Ag TOOL HOLDER FOR DRILLING AND CHISEL TOOLS
DE3714679A1 (en) * 1985-11-11 1988-11-10 Hilti Ag Tool holder
SU1488426A1 (en) * 1987-10-29 1989-06-23 Kyshtymskij Mashinostroitelnyj Drilling tool
DE4341969A1 (en) * 1993-12-09 1995-06-14 Hilti Ag Tool and tool holder for hand tools

Also Published As

Publication number Publication date
US5700018A (en) 1997-12-23
CN1147994A (en) 1997-04-23
DK0768150T3 (en) 2001-05-07
EP0768150A1 (en) 1997-04-16
CN1067931C (en) 2001-07-04
DE59606752D1 (en) 2001-05-17
JPH09117810A (en) 1997-05-06
DE19537560A1 (en) 1997-04-10
JP4025381B2 (en) 2007-12-19

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