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EP0988134B1 - Clamping chuck for bits or the like - Google Patents

Clamping chuck for bits or the like Download PDF

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Publication number
EP0988134B1
EP0988134B1 EP98928315A EP98928315A EP0988134B1 EP 0988134 B1 EP0988134 B1 EP 0988134B1 EP 98928315 A EP98928315 A EP 98928315A EP 98928315 A EP98928315 A EP 98928315A EP 0988134 B1 EP0988134 B1 EP 0988134B1
Authority
EP
European Patent Office
Prior art keywords
section
sleeve
torsion
sections
allocated
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
EP98928315A
Other languages
German (de)
French (fr)
Other versions
EP0988134A1 (en
Inventor
Martin Strauch
Sylvester Rosanwo
André Müller
Werner Tretbar
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.)
Wera Werk Hermann Werner GmbH and Co KG
Original Assignee
Wera Werk Hermann Werner GmbH and Co KG
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
Priority claimed from DE19804081.4A external-priority patent/DE19804081B4/en
Application filed by Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Publication of EP0988134A1 publication Critical patent/EP0988134A1/en
Application granted granted Critical
Publication of EP0988134B1 publication Critical patent/EP0988134B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00Screwdrivers
    • B25B15/001Screwdrivers characterised by material or shape of the tool bit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007Connections or joints between tool parts
    • B25B23/0035Connection means between socket or screwdriver bit and tool

Definitions

  • the invention relates to a chuck according to the generic term of claim 1 BZW 2.
  • US Pat. No. 3,744,350 discloses a generic type in FIGS. 1 to 3 Chuck. There can be two pods twist against each other. There is an elastic in each sleeve Element in the form of a ring with its External surface is connected to the sleeve wall and in whose ring opening is a cylindrical element, which the two sleeve sections so together that couples when applying a torque the two sleeves are limited against the restoring force of the elastic elements twisted against each other become.
  • This font shows another in Figures 4 and 5 Embodiment in which a clamping end and an output end via a spiral spring together are connected that when a torque is applied the clamping end is opposite the output end can twist.
  • the invention has for its object a generic Functionally improve chuck.
  • the torsion section is assigned to the chuck. at the same time it is ensured that the elastic Can only be twisted over a predetermined angular range takes place, so that damage to the torsion member is prevented.
  • the torsion link couples two axially one behind the other Sleeve sections. These sleeve sections can reach a limit torque twist against each other. There are attacks which are spaced from each other by a gap.
  • the Sleeve sections preferably consist of one behind the other Sleeve sections. In the profile cavities these sleeve sections are the two profiles of preferably dumbbell-shaped torsion member on.
  • the stops are formed by the two sleeve sections his.
  • the torsion section of the torsion link is cylindrical.
  • a sleeve can also be provided be the connecting joint between the two Covered sleeve sections.
  • the one support for the spring of an actuating sleeve forming sleeve for capturing the two shaft sections in the axial direction allows a relative rotation of the two sleeve sections against each other, the angular amount the rotatability through the gap width between the two stops.
  • Another Variants of the invention can also two sleeve sections until the limit torque is reached twist against each other.
  • the attacks are there but from one directly to the torsion zone subsequent profile section formed, which with Undersize in a corresponding profiling of the Torsion section surrounding sleeve engages so that the sleeve - as in the first embodiment - only then is a torque applied, when the limit torque is reached and the two Profile sections by a corresponding angle have twisted against each other.
  • This variant is the torsion section is a material-uniform extension of the clamping section.
  • the torsion section can extend to one material material Fastening section with which the clamping section trained core rotatably with a tool holder forming shaft section is connected.
  • the two sleeve-like shaft sections can under Form a circumferential joint. This joint can have sloping faces.
  • the Chuck can also be used with an actuating sleeve be provided, which covers the sleeve.
  • an actuating sleeve which covers the sleeve.
  • the two Sleeves are in one by means of the torsion link such an angular position to each other that a elastic evasibility in both left and in Legal direction is possible. It is bilateral Movement game before. During the movement of the two The torsion link is twisted against each other. This is the case up to a first limit torque Chuck like a quasi rigid body.
  • the first Limit torque is determined by the dimensioning and Pretreatment of the torsion section of the torsion link Are defined.
  • the torsion link yields resiliently, the torsion section twisted until the two Butts against each other. Between the two The two shaft sections can have limiting torques to twist the movement game against each other. As soon as the attacks collide, that works Chuck again as a quasi rigid body.
  • the chuck of the first embodiment has a polygonal, especially hexagonal Clamping section 1, by means of which the chuck in a drive element, for example a drilling machine can be clamped.
  • the end of the clamping section sits positively both in the direction of rotation and also secured in the axial direction in one end of one Sleeve section 6.
  • the other end of the sleeve section 6 has one Profile cavity 11, which is a polygonal, in particular has a hexagonal profile.
  • a second sleeve section 5 is provided, which also has such a profile cavity 10, which lies opposite the profile cavity 11.
  • the Sleeve section 5 has a tool holder 2, which is also a polygonal profile, especially a hexagonal profile has to insert a bit 18.
  • the Bit 18 has corner recesses on its polygonal section, in which a ball 17 presses to bit 18 to keep in a tied position in the chuck.
  • the ball 17 can be moved by moving an actuating sleeve 16 be relocated to a release point.
  • the actuating sleeve 16 is actuated by axial displacement the same against the pressure of a spring 19th
  • the actuating sleeve 16 overlaps a sleeve 15, which the joint of the two sleeve sections 5, 6 overlaps.
  • a sleeve 15 which the joint of the two sleeve sections 5, 6 overlaps.
  • extensions 12, 13 equipped, which with the formation of a Intermesh gap 14 claw-shaped, so that one Relative rotation of the two shaft sections 5, 6 by approx. 10 ° in both directions is possible.
  • a dumbbell-shaped torsion member 7 is inserted in the profile cavities 10, 11 of the two shaft sections 5, 6, a dumbbell-shaped torsion member 7 is inserted.
  • the torsion link is in the middle 7 a cylindrical torsion section 3, which can twist when torque is applied.
  • the Ends 8, 9 of the torsion member 7 are with a hexagonal profile equipped, which is essentially free of play engages in the profile cavities 10, 11 so that the torsion member 7 as a rotary driving member between the two shaft sections 5, 6 acts.
  • the resilient behavior between the angles a and b below the second limit torque becomes essentially due to the geometry and the material of the torsion section 3 determined. It is possible to use chucks with different torsion properties, by using the different chucks with different Torsion links are provided.
  • the tool holder 2 has a cavity on the bottom side forms a shoulder 21 on which a Edge portion of the end face of bit 18 rest can. This shoulder is constricted by the Cavity 10 of the shaft section 5 is formed.
  • the clamping section 1 and the A magnet 9 is provided at the end 9 of the torsion element 7, which, for example, glued to the torsion member 7, soldered or otherwise attached.
  • the magnetic force on bit 18 can be the face of the bit flat on the other end 8 of the Rest torsion 7.
  • the torsion section 3 lies in the area of the parting line of the two sleeve sections 5, 6. Also in this area the cavity has a hexagonal profile.
  • the Diameter of the torsion section which is circular in cross section 3 is less than the clear distance of the Hexagonal surfaces, so that free twisting is possible is.
  • the second embodiment also has one Insert section 1, however, this is made of the same material in the torsion section 3 and further in a profile section 26, by means of which the thus formed core rotatably in a cavity 10 of the shank section 5 forming the tool holder 2 rests.
  • the shaft section 5 is of a sleeve formed, which also carries a magnet 24, which forms the bottom of the tool holder 2.
  • the Locking of the tool 18 via ball 17 and actuating sleeves 16 takes place as in the first embodiment.
  • the actuating sleeve 16 has none on the outside Corrugation, but circumferential grooves.
  • the sleeve 5 is non-rotatable with a material-uniform Extension of the insertion section 1 connected.
  • a further sleeve 6 In an axial position between the insertion section 1 and shaft section 5 is a further sleeve 6.
  • This section 6 has a profile cavity 11, which directly to the insertion section 1 adjacent. In this profile cavity 11 sits with little Play according to the insertion section 1
  • Das Torsion member 7 has as in the first embodiment a torsion section 3 in the form of a constriction. Beyond the constriction 3, the torsion section has 7 a profile section 22, which is undersized in a corresponding hollow profile 23 Sleeve 6 lies with greater play. 9 is shown how the hexagonal profile 22 in one also designed hexagonal with oversize Recess 23 of section 6 lies.
  • the two Profiles 22, 23 enter a torque-transmitting Attachment if you previously have a certain angular amount have been twisted against each other.
  • the profile-identical extension 26 of the profile section 22 is rotatably coupled to the sleeve 5.
  • the two shaft sections 5, 6 meet in the form of a circumferential joint 25 provided with oblique front edges to each other so that the two sections 5, 6 can twist against each other.
  • a core part which on the one hand forms the clamping section 1 and with its other end rotatably with the tool holder 2 is connected.
  • This core is designed that he - for example, by a cross-sectional taper Zone - forms a torsion section 3.
  • the torsion section 3 is made of hexagon profiles of the same design limited so that the core is made from a hexagonal strand material can be manufactured.
  • the clamping section side profile section adjacent to the torsion zone 3 9 is in a corresponding game with less play Profile cavity 11 of a sleeve 6 as the profile section 22 lying beyond the torsion zone 3 lies in a profile cavity 23.
  • the sleeve 6 is used therefore only when a limit torque is exceeded as a torque-transmitting organ.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Description

Die Erfindung betrifft ein Spannutter gemäß Gattungsbegriff des Anspruches 1 BZW 2.The invention relates to a chuck according to the generic term of claim 1 BZW 2.

US 3,744,350 offenbart in den Figuren 1 bis 3 ein gattungsgemäßes Spannfutter. Dort können sich zwei Hülsen gegeneinander verdrehen. In jeder Hülse sitzt ein elastisches Element in Form eines Ringes, der mit seiner Außenfläche mit der Hülsenwandung verbunden ist und in dessen Ringöffnung ein zylindrisches Element steckt, welches die beiden Hülsenabschnitte derartig miteinander drehkoppelt, dass bei Ausübung eines Drehmomentes die beiden Hülsen anschlagbegrenzt gegen die Rückstellkraft der elastischen Elemente gegeneinander verdreht werden.US Pat. No. 3,744,350 discloses a generic type in FIGS. 1 to 3 Chuck. There can be two pods twist against each other. There is an elastic in each sleeve Element in the form of a ring with its External surface is connected to the sleeve wall and in whose ring opening is a cylindrical element, which the two sleeve sections so together that couples when applying a torque the two sleeves are limited against the restoring force of the elastic elements twisted against each other become.

Diese Schrift zeigt in ihren Figuren 4 und 5 ein weiteres Ausführungsbeispiel, bei dem ein Einspannende und ein Abtriebsende über eine Spiralfeder derart miteinander verbunden sind, dass bei Beaufschlagung eines Drehmomentes das Einspannende sich gegenüber dem Abtriebsende verdrehen kann.This font shows another in Figures 4 and 5 Embodiment in which a clamping end and an output end via a spiral spring together are connected that when a torque is applied the clamping end is opposite the output end can twist.

Aus der DE 41 43 218 sind verschiedene Ausführungsformen von Halterungen für Schraubendrehereinsätze bekannt, bei denen sich der Einspannabschnitt gegenüber der Werkzeugaufnahme gegen die Rückstellkraft einer Feder verdrehen kann. Die Feder wird dort von einem Tellerfederpaket gebildet. Ein anderes Ausführungsbeispiel dieser Schrift zeigt ein nicht anschlagbegrenztes Spannfutter, bei dem eine Torsionszone von einem endseitig gerändelten Stift ausgebildet ist. Various embodiments are known from DE 41 43 218 known from holders for screwdriver bits, where the clamping section is opposite the tool holder against the restoring force of a Spring can twist. The feather is there by one Disc spring assembly formed. Another embodiment this document shows a non-stroke-limited Chuck, in which a torsion zone from one end knurled pin is formed.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Spannfuter funktionell zu verbessern.The invention has for its object a generic Functionally improve chuck.

Gelöst wird die Aufgabe durch die in den Ansprüchen 1 und 2 angegebene Erfindung. Die Unteransprüche stellen vorteilhafte Weiterbildungen dar.The problem is solved by the in claims 1 and 2 specified invention. Make the subclaims advantageous further developments.

Der Torsionsabschnitt ist dem Spannfutter zugeordnet. gleichzeitig ist sichergestellt, dass die elastische Tordierbarkeit nur über einen vorbestimmten Winkelbereich erfolgt, so dass eine Schädigung des Torsionsgliedes verhindert wird. In einer ersten Variante der Erfindung koppelt das Torsionsglied zwei axial hintereinanderliegende Hülsenabschnitte. Diese Hülsenabschnitte können sich bis zum Erreichen eines Grenzdrehmomentes gegeneinander verdrehen. Es sind Anschläge vorgeshen, die durch einen Spalt voneinander beabstandet sind. Die Hülsenabschnitte bestehen vorzugsweise aus hintereinanderliegenden Hülsenabschnitten. In den Profilhöhlungen dieser Hülsenabschnitte liegen die beiden Profile des vorzugsweise hantelförmigen Torsionsgliedes formschlüssig ein. In der ersten Variante der Erfindung können die Anschläge von den beiden Hülsenabschnitten ausgebildet sein. Vorzugsweise werde diese Anschläge von mit Bewegungsspiel ineinandergreifenden Hülsenrandabschnitten ausgebildet. Der Torsionsabschnitt des Torsionsgliedes ist zylinderförmig. Ferner kann eine Muffe vorgesehen sein, die die Verbindungsfuge zwischen den beiden Hülsenabschnitten überfängt. Die eine Abstützung für die Feder einer Betätigungshülse bildende Muffe sorgt für eine Fesselung der beiden Schaftabschnitte in Axialrichtung, erlaubt jedoch eine relative Drehbarkeit der beiden Hülsenabschnitte gegeneinander, wobei der Winkelbetrag der Drehbarkeit durch die Spaltweite zwischen den beiden Anschlägen festgelegt wird. Bei einer weiteren Variante der Erfindung können sich ebenfalls die beiden Hülsenabschnitte bis zum Erreichen des Grenzdrehmomentes gegeneinander verdrehen. Die Anschläge sind dort aber von einem sich unmittelbar an die Torsionszone anschließenden Profilabschnitt gebildet, welcher mit Untermaß in eine entsprechende Profilierung der den Torsionsabschnitt umgebenden Hülse eingreift, so dass die Hülse - ebenso wie beim ersten Ausführungsbeispiel - erst dann mit einem Drehmoment beaufschlagt wird, wenn das Grenzdrehmoment erreicht ist und die beiden Profilabschnitte sich um ein entsprechendes Winkelmaß gegeneinander verdreht haben. Bei dieser Variante ist der Torsionsabschnitt eine materialeinheitliche Verlängerung des Einspannabschnittes. Der Torsionsabschnitt kann sich materialeinheitlich verlängern bis in einen Befestigungsabschnitt, mit welchem der den Einspannsabschnitt ausbildene Kern drehfest mit einem die Werkzeugaufnahme ausbildenden Schaftabschnitt verbunden ist. Die beiden hülsenartigen Schaftabschnitte können unter Ausbildung einer umlaufenden Fuge gegeneinanderstoßen. Diese Fuge kann schräge Stirnflächen besitzen. Das Spannfutter kann ferner mit einer Betätigungshülse versehen sein, welche die Muffe überfängt. Hinsichtlich der Funktionsweise der Betätigungshülse und des Klemmittels, welches als Kugel ausgebildet ist, wird auf die Gebrauchsmusterschrift 90 00 245.8 verwiesen. Die beiden Hülsen werden mittels des Torsionsgliedes in einer derartigen Winkellage zueinander gehalten, dass eine elastische Ausweichbarkeit sowohl in Links- als auch in Rechtsrichtung möglich ist. Es liegt ein beidseitiges Bewegungsspiel vor. Während der Bewegung der beiden Hülsen gegeneinander wird das Torsionsglied tordiert. Bis zu einem ersten Grenzdrehmoment verhält sich das Spannfutter wie ein quasi starrer Körper. Das erste Grenzdrehmoment wird durch die Dimensionierung und die Vorbehandlung des Torsionsabschnites des Torsionsgliedes definiert. Bei Überschreitung des ersten Grenzdrehmomentes gibt das Torsionsglied federelastisch nach, wobei der Torsionsabschnitt tordiert, bis die beiden Anschläge gegeneinander stoßen. Zwischen den beiden Grenzdrehmomenten können sich die beiden Schaftabschnitte um das Bewegungsspiel gegeneinander verdrehen. Sobald die Anschläge gegeneinander stoßen, wirkt das Spannfutter wieder als quasi starrer Körper. The torsion section is assigned to the chuck. at the same time it is ensured that the elastic Can only be twisted over a predetermined angular range takes place, so that damage to the torsion member is prevented. In a first variant of the invention the torsion link couples two axially one behind the other Sleeve sections. These sleeve sections can reach a limit torque twist against each other. There are attacks which are spaced from each other by a gap. The Sleeve sections preferably consist of one behind the other Sleeve sections. In the profile cavities these sleeve sections are the two profiles of preferably dumbbell-shaped torsion member on. In the first variant of the invention the stops are formed by the two sleeve sections his. These attacks are preferably carried out by Movement play in interlocking sleeve edge sections educated. The torsion section of the torsion link is cylindrical. A sleeve can also be provided be the connecting joint between the two Covered sleeve sections. The one support for the spring of an actuating sleeve forming sleeve for capturing the two shaft sections in the axial direction, however allows a relative rotation of the two sleeve sections against each other, the angular amount the rotatability through the gap width between the two stops. Another Variants of the invention can also two sleeve sections until the limit torque is reached twist against each other. The attacks are there but from one directly to the torsion zone subsequent profile section formed, which with Undersize in a corresponding profiling of the Torsion section surrounding sleeve engages so that the sleeve - as in the first embodiment - only then is a torque applied, when the limit torque is reached and the two Profile sections by a corresponding angle have twisted against each other. This variant is the torsion section is a material-uniform extension of the clamping section. The torsion section can extend to one material material Fastening section with which the clamping section trained core rotatably with a tool holder forming shaft section is connected. The two sleeve-like shaft sections can under Form a circumferential joint. This joint can have sloping faces. The Chuck can also be used with an actuating sleeve be provided, which covers the sleeve. Regarding the functioning of the actuating sleeve and the clamping means, which is designed as a ball is on the Utility model specification 90 00 245.8. The two Sleeves are in one by means of the torsion link such an angular position to each other that a elastic evasibility in both left and in Legal direction is possible. It is bilateral Movement game before. During the movement of the two The torsion link is twisted against each other. This is the case up to a first limit torque Chuck like a quasi rigid body. The first Limit torque is determined by the dimensioning and Pretreatment of the torsion section of the torsion link Are defined. If the first limit torque is exceeded the torsion link yields resiliently, the torsion section twisted until the two Butts against each other. Between the two The two shaft sections can have limiting torques to twist the movement game against each other. As soon as the attacks collide, that works Chuck again as a quasi rigid body.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand beigefügter Figuren erläutert. Es zeigt:

Fig. 1
ein erfindungsgemäßes Spannfutter eines ersten Ausführungsbeispiels in der Ansicht,
Fig. 2
einen Schnitt gemäß der Linie II-II in Fig. 1,
Fig. 3
einen Schnitt gemäß der Linie III-III in Fig. 2,
Fig. 4
eine Explosivdarstellung der beiden Schaftabschnitte und des Torsionsgliedes,
Fig. 5
eine schematische Darstellung des Drehmoments/Torsionsverlaufs,
Fig. 6
eine Darstellung eines zweiten Ausführungsbeispieles gemäß Fig. 1,
Fig. 7
einen Schnitt gemäß der Linie VII-VII in Fig. 6,
Fig. 8
einen Schnitt gemäß der Linie VIII-VIII in Fig. 7 und
Fig. 9
einen Schnitt gemäß der Linie IX-IX in Fig. 7.
Exemplary embodiments of the invention are explained below with reference to the attached figures. It shows:
Fig. 1
an inventive chuck of a first embodiment in the view,
Fig. 2
2 shows a section along the line II-II in FIG. 1,
Fig. 3
2 shows a section along the line III-III in FIG. 2,
Fig. 4
an exploded view of the two shaft sections and the torsion member,
Fig. 5
a schematic representation of the torque / torsion curve,
Fig. 6
1 shows a representation of a second exemplary embodiment according to FIG. 1,
Fig. 7
6 shows a section along the line VII-VII in FIG. 6,
Fig. 8
a section along the line VIII-VIII in Fig. 7 and
Fig. 9
a section along the line IX-IX in Fig. 7.

Das Spannfutter des ersten Ausführungsbeispieles besitzt einen mehrkantförmigen, insbesondere sechskantförmigen Einspannabschnitt 1, mittels welchem das Spannfutter in ein Antriebsorgan, beispielsweise eine Bohrmaschine einspannbar ist. Das Ende des Einspannabschnittes sitzt formschlüssig sowohl in Drehrichtung, als auch in Achsrichtung gesichert in dem einen Ende eines Hülsenabschnittes 6. The chuck of the first embodiment has a polygonal, especially hexagonal Clamping section 1, by means of which the chuck in a drive element, for example a drilling machine can be clamped. The end of the clamping section sits positively both in the direction of rotation and also secured in the axial direction in one end of one Sleeve section 6.

Das andere Ende des Hülsenabschnittes 6 besitzt eine Profilhöhlung 11, welche ein mehrkantförmiges, insbesondere sechskantförmiges Profil aufweist. Daran anschließend ist ein zweiter Hülsenabschnitt 5 vorgesehen, welcher ebenfalls eine derartige Profilhöhlung 10 aufweist, die der Profilhöhlung 11 gegenüberliegt. Der Hülsenabschnitt 5 besitzt eine Werkzeugaufnahme 2, welche ebenfalls ein Mehrkantprofil, insbesondere Sechskantprofil aufweist zum Einstecken eines Bits 18. Der Bit 18 besitzt an seinem Mehrkantabschnitt Eckausnehmungen, in welche eine Kugel 17 drückt, um den Bit 18 in einer gefesselten Lage im Spannfutter zu halten.The other end of the sleeve section 6 has one Profile cavity 11, which is a polygonal, in particular has a hexagonal profile. After that a second sleeve section 5 is provided, which also has such a profile cavity 10, which lies opposite the profile cavity 11. The Sleeve section 5 has a tool holder 2, which is also a polygonal profile, especially a hexagonal profile has to insert a bit 18. The Bit 18 has corner recesses on its polygonal section, in which a ball 17 presses to bit 18 to keep in a tied position in the chuck.

Die Kugel 17 kann durch Verschieben einer Betätigungshülse 16 in eine Freigabestelle verlagert werden. Die Betätigung der Betätigungshülse 16 erfolgt durch Axialverlagerung derselben gegen den Druck einer Feder 19.The ball 17 can be moved by moving an actuating sleeve 16 be relocated to a release point. The The actuating sleeve 16 is actuated by axial displacement the same against the pressure of a spring 19th

Die Betätigungshülse 16 überfängt eine Muffe 15, welche die Trennfuge der beiden Hülsenabschnitte 5, 6 überfängt. Im Bereich der Trennfuge der Hülsenabschnitte 5, 6 sind die Enden der Hülsenabschnitte 5, 6 mit Fortsätzen 12, 13 ausgestattet, welche unter Ausbildung eines Spaltes 14 klauenförmig ineinandergreifen, so daß eine Relativverdrehung der beiden Schaftabschnitte 5, 6 um ca. 10° in beiden Richtungen möglich ist.The actuating sleeve 16 overlaps a sleeve 15, which the joint of the two sleeve sections 5, 6 overlaps. In the area of the joint of the sleeve sections 5, 6 are the ends of the sleeve sections 5, 6 with extensions 12, 13 equipped, which with the formation of a Intermesh gap 14 claw-shaped, so that one Relative rotation of the two shaft sections 5, 6 by approx. 10 ° in both directions is possible.

In die Profilhöhlungen 10, 11 der beiden Schaftabschnitte 5, 6 ist ein hantelförmiges Torsionsglied 7 eingesteckt. Im mittleren Bereich besitzt das Torsionsglied 7 einen zylinderförmigen Torsionsabschnitt 3, welcher sich bei Drehmomentbeaufschlagung verdrehen kann. Die Enden 8, 9 des Torsionsgliedes 7 sind mit einem Sechskantprofil ausgestattet, welches im wesentlichen spielfrei in die Profilhöhlungen 10, 11 eingreift, so daß das Torsionsglied 7 als Drehmitnahmeglied zwischen den beiden Schaftabschnitten 5, 6 wirkt.In the profile cavities 10, 11 of the two shaft sections 5, 6, a dumbbell-shaped torsion member 7 is inserted. The torsion link is in the middle 7 a cylindrical torsion section 3, which can twist when torque is applied. The Ends 8, 9 of the torsion member 7 are with a hexagonal profile equipped, which is essentially free of play engages in the profile cavities 10, 11 so that the torsion member 7 as a rotary driving member between the two shaft sections 5, 6 acts.

Da die Muffe 15 über Halteringe 20 mit den beiden Schaftabschnitten 5, 6 verbunden ist, sind die beiden Hülsenabschnitte axial zueinander gefesselt, können sich aber gegeneinander um den durch die Spaltweite definierten Winkelbetrag verdrehen.Since the sleeve 15 via retaining rings 20 with the two Shaft sections 5, 6 are connected, are the two Sleeve sections axially tied to each other, can but against each other by the gap width turn the defined angular amount.

Um die beiden Hülsenabschnitte 5, 6 gegeneinander verdrehen zu können, muß ein gewisses Drehmoment aufgewandt werden, welches ggf. ein erstes Drehmoment M1 überschreitet. Dieses erste Drehmoment M1 wird durch den Härteverlauf bzw. die Vorbehandlung des Torsionsgliedes bestimmt. Bis dahin tordiert das Spannfutter nur geringfügig um den Winkel a. Bei Steigerung des Drehmomentes verdrehen sich die beiden Schaftabschnitte 5, 6 um den Winkel W, bis das zweite Grenzdrehmoment M2 bei einer Winkelstellung b erreicht wird. Dann stoßen die beiden Anschläge 4, welche von den Fortsätzen 12, 13 gebildet werden, gegeneinander, so daß eine unmittelbare Drehmomentmitnahme der beiden Hülsenabschnitte 5, 6 gegeben ist. Wie aus der Fig. 5 ersichtlich ist, verhält sich das Spannfutter dann ähnlich wie im Bereich geringer Drehmomente wie ein quasi starrer Körper. Nur im Bereich zwischen den beiden Grenzdrehmomenten M1 und M2 können sich die beiden Schaftabschnitte 5, 6 durch elastische Verformung des Torsionsabschnittes 3 gegeneinander verdrehen.Twist the two sleeve sections 5, 6 against each other To be able to use a certain torque which may have a first torque M1 exceeds. This first torque M1 is through the course of hardness or the pretreatment of the torsion link certainly. Until then, the chuck twists only slightly by the angle a. When increasing the The two shaft sections twist 5, 6 through the angle W until the second limit torque M2 is reached at an angular position b. Then come across the two stops 4, which of the extensions 12, 13 are formed against each other, so that an immediate Torque entrainment of the two sleeve sections 5, 6 is given. As can be seen from FIG. 5, the chuck behaves similarly to the area lower torques like a quasi rigid body. Only in the area between the two limit torques M1 and M2 can be the two shaft sections 5, 6 by elastic deformation of the torsion section 3 turn against each other.

Wesentlich ist, daß das Spannfutter oberhalb des zweiten Grenzdrehmomentes steifer wirkt, als unterhalb des zweiten Grenzdrehmomentes, wo es federelastisch Torsion ausweichen kann. It is essential that the chuck is above the second Limit torque acts stiffer than below the second limit torque where there is spring elastic torsion can dodge.

Das federnde Verhalten zwischen den Winkel a und b unterhalb des zweiten Grenzdrehmomentes wird im wesentlichen durch die Geometrie und den Werkstoff des Torsionsabschnittes 3 bestimmt. Es ist möglich, Spannfutter mit verschiedenen Torsionseigenschaften herzustellen, indem die verschiedenen Spannfutter mit unterschiedlichen Torsionsgliedern versehen werden.The resilient behavior between the angles a and b below the second limit torque becomes essentially due to the geometry and the material of the torsion section 3 determined. It is possible to use chucks with different torsion properties, by using the different chucks with different Torsion links are provided.

Die Werkzeugaufnahme 2 besitzt eine Höhlung, die bodenseitig eine Schulter 21 ausbildet, auf welcher ein Randabschnitt der Stirnfläche des Bits 18 aufliegen kann. Diese Schulter wird von einer Einschnürung der Höhlung 10 des Schaftabschnittes 5 ausgebildet.The tool holder 2 has a cavity on the bottom side forms a shoulder 21 on which a Edge portion of the end face of bit 18 rest can. This shoulder is constricted by the Cavity 10 of the shaft section 5 is formed.

In einer nicht dargestellten Ausführungsform ist vorgesehen, daß zwischen dem Einspannabschnitt 1 und dem Ende 9 des Torsionsgliedes 7 ein Magnet vorgesehen ist, welcher bspw. mit dem Torsionsglied 7 verklebt, verlötet oder anderweitig befestigt ist. Zur optimalen Übertragung der Magnetkraft auf den Bit 18 kann die Stirnfläche des Bits flächig auf dem anderen Ende 8 des Torsionsgliedes 7 aufliegen.In an embodiment, not shown, it is provided that that between the clamping section 1 and the A magnet 9 is provided at the end 9 of the torsion element 7, which, for example, glued to the torsion member 7, soldered or otherwise attached. For optimal transmission the magnetic force on bit 18 can be the face of the bit flat on the other end 8 of the Rest torsion 7.

Der Torsionsabschnitt 3 liegt im Bereich der Trennfuge der beiden Hülsenabschnitte 5, 6. Auch in diesem Bereich besitzt die Höhlung ein Sechskantprofil. Der Durchmesser des im Querschnitt kreisrunden Torsionsabschnittes 3 ist geringer, als der lichte Abstand der Sechskantflächen, so daß eine freie Tordierung möglich ist.The torsion section 3 lies in the area of the parting line of the two sleeve sections 5, 6. Also in this area the cavity has a hexagonal profile. The Diameter of the torsion section which is circular in cross section 3 is less than the clear distance of the Hexagonal surfaces, so that free twisting is possible is.

Das zweite Ausführungsbeispiel besitzt ebenfalls einen Einsteckabschnitt 1, dieser setzt sich allerdings materialeinheitlich in den Torsionsabschnitt 3 und weiter in einem Profilabschnitt 26 fort, mittels welchem der so ausgebildete Kern drehfest in einer Höhlung 10 des die Werkzeugaufnahme 2 ausbildenden Schaftabschnittes 5 einliegt. Der Schaftabschnitt 5 wird von einer Hülse ausgebildet, welche ebenfalls einen Magneten 24 trägt, welcher den Boden der Werkzeugaufnahme 2 ausbildet. Die Verrastung des Werkzeuges 18 über Kugel 17 und Betätigungshülsen 16 erfolgt wie beim ersten Ausführungsbeispiel. Die Betätigungshülse 16 besitzt äußerlich keine Riffelung, sondern umlaufende Rillen.The second embodiment also has one Insert section 1, however, this is made of the same material in the torsion section 3 and further in a profile section 26, by means of which the thus formed core rotatably in a cavity 10 of the shank section 5 forming the tool holder 2 rests. The shaft section 5 is of a sleeve formed, which also carries a magnet 24, which forms the bottom of the tool holder 2. The Locking of the tool 18 via ball 17 and actuating sleeves 16 takes place as in the first embodiment. The actuating sleeve 16 has none on the outside Corrugation, but circumferential grooves.

Die Hülse 5 ist wie gesagt drehfest mit einer materialeinheitlichen Verlängerung des Einsteckabschnittes 1 verbunden. In einer axialen Position zwischen Einsteckabschnitt 1 und Schaftabschnitt 5 befindet sich eine weitere Hülse 6. Dieser Abschnitt 6 besitzt eine Profilhöhlung 11, welche unmittelbar an den Einsteckabschnitt 1 angrenzt. In dieser Profilhöhlung 11 sitzt mit geringem Spiel ein entsprechend dem Einsteckabschnitt 1 Mehrkantprofilabschnitt 9 des Torsionsgliedes 7. Das Torsionsglied 7 besitzt wie beim ersten Ausführungsbeispiel einen Torsionabschnitt 3 in Form einer Einschnürung. Jenseits der Einschnürung 3 besitzt der Torsionabschnitt 7 einen Profilabschnitt 22, welcher mit Untermaß in einer entsprechenden Hohlprofilierung 23 der Hülse 6 mit größerem Spiel einliegt. In Fig. 9 ist dargestellt, wie das sechseckförmige Profil 22 in einer mit Übermaß gestalteten ebenfalls sechseckförmigen Aussparung 23 des Abschnittes 6 einliegt. Die beiden Profile 22, 23 treten in eine drehmomentübertragende Anlage, wenn Sie zuvor um einen gewissen Winkelbetrag gegeneinander verdreht worden sind.As said, the sleeve 5 is non-rotatable with a material-uniform Extension of the insertion section 1 connected. In an axial position between the insertion section 1 and shaft section 5 is a further sleeve 6. This section 6 has a profile cavity 11, which directly to the insertion section 1 adjacent. In this profile cavity 11 sits with little Play according to the insertion section 1 Polygonal profile section 9 of the torsion member 7. Das Torsion member 7 has as in the first embodiment a torsion section 3 in the form of a constriction. Beyond the constriction 3, the torsion section has 7 a profile section 22, which is undersized in a corresponding hollow profile 23 Sleeve 6 lies with greater play. 9 is shown how the hexagonal profile 22 in one also designed hexagonal with oversize Recess 23 of section 6 lies. The two Profiles 22, 23 enter a torque-transmitting Attachment if you previously have a certain angular amount have been twisted against each other.

Die profilidentische Verlängerung 26 des Profilabschnittes 22 ist drehfest mit der Hülse 5 gekuppelt. Die beiden Schaftabschnitte 5, 6 stoßen in Form einer mit schrägen Stirnkanten versehenen umlaufenden Fuge 25 aneinander, so daß sich die beiden Abschnitte 5, 6 gegeneinander verdrehen können.The profile-identical extension 26 of the profile section 22 is rotatably coupled to the sleeve 5. The two shaft sections 5, 6 meet in the form of a circumferential joint 25 provided with oblique front edges to each other so that the two sections 5, 6 can twist against each other.

Beim zweiten Ausführungsbeispiel wird es als vorteilhaft angesehen, daß nur ein Kernteil vorgesehen ist, welches einerseits den Einspannabschnitt 1 ausbildet und mit seinem anderen Ende drehfest mit der Werkzeugaufnahme 2 verbunden ist. Dieser Kern ist so ausgebildet, daß er - bspw. durch eine querschnittsverjüngte Zone - einen Torsionsabschnitt 3 ausbildet. Der Torsionsabschnitt 3 wird von gleichgestalteten Sechskantprofilen begrenzt, so daß der Kern aus einem Sechskant-Strangmaterial hergestellt werden kann. Der einspannabschnittseitig an die Torsionszone 3 angrenzende Profilabschnitt 9 steckt mit geringerem Spiel in einer entsprechenden Profilhöhlung 11 einer Hülse 6, als der jenseits der Torsionszone 3 liegende Profilabschnitt 22 in einer Profilhöhlung 23 liegt. Die Hülse 6 dient daher lediglich bei Überschreiten eines Grenzdrehmomentes als drehmomentübertragendes Organ.In the second embodiment, it becomes advantageous viewed that only a core part is provided, which on the one hand forms the clamping section 1 and with its other end rotatably with the tool holder 2 is connected. This core is designed that he - for example, by a cross-sectional taper Zone - forms a torsion section 3. The torsion section 3 is made of hexagon profiles of the same design limited so that the core is made from a hexagonal strand material can be manufactured. The clamping section side profile section adjacent to the torsion zone 3 9 is in a corresponding game with less play Profile cavity 11 of a sleeve 6 as the profile section 22 lying beyond the torsion zone 3 lies in a profile cavity 23. The sleeve 6 is used therefore only when a limit torque is exceeded as a torque-transmitting organ.

Claims (11)

  1. Chuck with a shank, comprising two sleeve-shaped sections (5, 6), wherein a clamping section (1) for clamping into a driving mechanism is allocated to one sleeve-shaped section (6) on the end face and a tool receiver (2) for receiving a tool, in particular a screwdriver bit (18), is allocated to the other sleeve-shaped section (5) on the end face and the two sleeve-shaped shank sections (5, 6), in accordance with a torsion section (3) constructed from a torsion member (7) allocated to their cavities, can be twisted with respect to one another about an angle amount (a-b) limited by a stop, characterised in that the torsion zone (3) is arranged between two hexagonal sections of the torsion member (7), with which the torsion member is inserted into hexagonal sections free from backlash in the cavities (10, 11) of the sleeves (5, 6) and the torsion member is continued into the plug-in section (1) with uniformity of material.
  2. Chuck with a shank comprising two sleeve-shaped sections (5, 6), wherein a clamping section (1) for clamping into a driving mechanism is allocated to one sleeve-shaped section (6) on the end face and a tool receiver (2) for receiving a tool, in particular a screwdriver bit (18) is allocated to the other sleeve-shaped section (5) on the end face and the two sleeve-shaped shank sections (5, 6), in accordance with a torsion section (3) constructed from a torsion member (7) allocated to their cavities can be twisted with respect to one another about an angle amount (a-b) limited by a stop, characterised in that the torsion zone (3) is arranged between two hexagonal sections of the torsion member (7), with which the torsion member is inserted into hexagonal sections free of backlash in the cavities (10, 11) of the sleeves (5, 6), wherein the stop limit allocated to the area of the dividing line between the two sleeves (5, 6) is gripped by a bush (15) axially anchoring the sleeves (5, 6).
  3. Chuck according to Claim 1 or 2, characterised in that the torsion section (3) is a cylindrical section with reduced diameter.
  4. Chuck according to one of the preceding claims, characterised in that the stops are constructed from sleeve sections (12, 13) of the shaft section (5, 6) engaging in one another with play of movement.
  5. Chuck according to one of Claims 1, 3 or 4, characterised by an actuating sleeve (16), axially displaceable against the force of a spring (19) supported on the bush (15) and gripping the bush (15), for the detachable holding of a clamping means (17) for holding the tool.
  6. Chuck according to one of Claims 2, 3 or 4, characterised in that the stops are constructed from a profile section (22) of the torsion member (7) located in a hollow profile section (23) of the sleeve (6) with play of movement.
  7. Chuck according to one of Claims 2, 3, 4 or 6, characterised in that an extension (26) of the torsion section, with uniformity of material, is firmly inserted in the sleeve (5) allocated to the tool receiver (2).
  8. Chuck according to one of Claims 6 or 7, characterised in that the profile section (22) located in the hollow profile (23) with play of movement has the same hexagonal profile as the profile section (26) which is in fixed mutual rotation with the shank section (5).
  9. Chuck according to one of Claims 6 to 8, characterised in that the two sleeves (5, 6) abut against one another, constructing an oblique, circulating dividing line (25).
  10. Chuck according to one of Claims 2, 3, 4, 6 to 9, characterised in that the core forming the clamping section (1), the torsion zone (3) and the mounting section (26) is made of a hexagonal profile.
  11. Chuck according to one of Claims 2, 3, 4, 6 to 9, characterised in that the sleeve (6) is impacted with torque only after torsion of the torsion section and exceeding of the limit torque.
EP98928315A 1997-06-02 1998-05-23 Clamping chuck for bits or the like Expired - Lifetime EP0988134B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19722776 1997-06-02
DE19722776 1997-06-02
DE19804081 1998-02-03
DE19804081.4A DE19804081B4 (en) 1997-06-02 1998-02-03 Chuck for bits or the like
PCT/EP1998/003058 WO1998055268A1 (en) 1997-06-02 1998-05-23 Clamping chuck for bits or the like

Publications (2)

Publication Number Publication Date
EP0988134A1 EP0988134A1 (en) 2000-03-29
EP0988134B1 true EP0988134B1 (en) 2002-01-09

Family

ID=26037010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98928315A Expired - Lifetime EP0988134B1 (en) 1997-06-02 1998-05-23 Clamping chuck for bits or the like

Country Status (5)

Country Link
US (1) US6345560B1 (en)
EP (1) EP0988134B1 (en)
CN (1) CN1072546C (en)
AU (1) AU8020098A (en)
WO (1) WO1998055268A1 (en)

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EP2098336A2 (en) 2008-03-05 2009-09-09 Felo-Werkzeugfabrik Holland-Letz Gmbh Holder for screwdriver inserts
DE102010038210A1 (en) 2010-10-15 2012-04-19 Wera-Werk Hermann Werner Gmbh & Co. Kg Torque transmission device for use with a rotary impact driver
DE102010038211A1 (en) 2010-10-15 2012-04-19 Wera-Werk Hermann Werner Gmbh & Co. Kg Torque transmission device, in particular in the form of a chuck for bits
DE102011000710A1 (en) 2011-02-14 2012-08-16 Wera-Werk Hermann Werner Gmbh & Co. Kg Torque transmission device in the form of a bit lining

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Publication number Priority date Publication date Assignee Title
EP2098336A2 (en) 2008-03-05 2009-09-09 Felo-Werkzeugfabrik Holland-Letz Gmbh Holder for screwdriver inserts
DE102010038210A1 (en) 2010-10-15 2012-04-19 Wera-Werk Hermann Werner Gmbh & Co. Kg Torque transmission device for use with a rotary impact driver
DE102010038211A1 (en) 2010-10-15 2012-04-19 Wera-Werk Hermann Werner Gmbh & Co. Kg Torque transmission device, in particular in the form of a chuck for bits
WO2012049078A1 (en) 2010-10-15 2012-04-19 Wera - Werk Hermann Werner Gmbh & Co. Kg Torque transmission device for use with a rotary impact screwdriver
WO2012049079A1 (en) 2010-10-15 2012-04-19 Wera - Werk Hermann Werner Gmbh & Co. Kg Torque transmission device, in particular in the form of a chuck for a bit
DE102011000710A1 (en) 2011-02-14 2012-08-16 Wera-Werk Hermann Werner Gmbh & Co. Kg Torque transmission device in the form of a bit lining
WO2012110453A1 (en) 2011-02-14 2012-08-23 Wera - Werk Hermann Werner Gmbh & Co. Kg Torque transmission device in the form of a bit chuck

Also Published As

Publication number Publication date
CN1259068A (en) 2000-07-05
US6345560B1 (en) 2002-02-12
CN1072546C (en) 2001-10-10
WO1998055268A1 (en) 1998-12-10
EP0988134A1 (en) 2000-03-29
AU8020098A (en) 1998-12-21

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