EP0999921B1 - Spannfutter mit bogenstück - Google Patents
Spannfutter mit bogenstück Download PDFInfo
- Publication number
- EP0999921B1 EP0999921B1 EP97936598A EP97936598A EP0999921B1 EP 0999921 B1 EP0999921 B1 EP 0999921B1 EP 97936598 A EP97936598 A EP 97936598A EP 97936598 A EP97936598 A EP 97936598A EP 0999921 B1 EP0999921 B1 EP 0999921B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bushing
- shaft end
- chuck according
- clamping chuck
- curved piece
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B15/00—Screwdrivers
- B25B15/001—Screwdrivers characterised by material or shape of the tool bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/0007—Connections or joints between tool parts
- B25B23/0035—Connection means between socket or screwdriver bit and tool
Definitions
- the invention relates to a chuck for shaft ends of Tool bits, especially hexagon screwdriver bits with corner cut-outs on the shaft or all around Engagement grooves, with a receiving the shaft end Bushing, the inner cross section of which is the cross section of the shaft end corresponds and at least one to the shaft end by the movement of a sleeve seated on the socket, limited movable locking device that in one Wall opening of the socket is arranged, the sleeve movable in the longitudinal and / or circumferential direction of the socket and with at least one clamping surface against the locking member Action on the shaft end can be applied.
- Such chucks are for example from DE 29 34 428, DE-PS 32 43 389, DE-PS 33 30 486, the EP 0 462 257, DE-OS 42 43 650 or DE-OS 43 36 376.
- a locking device is used in one Wall bore of the socket seated ball used by the system against the clamping surface of the sleeve against the shaft end the screwdriver bit on the surface or a corner presses and this against an unintentional Falling locked out of the chuck.
- the wall hole in the socket must be very precise be carried out, because on the inner wall of the socket shoulders must stop, the ball falling out into the Prevent the inside of the socket when the shaft end is not inserted. Problems can already arise in this context come when the drilling tool used is different Operating temperatures or wear. In the Practice is therefore in the manufacture of such chucks to expect an increased committee.
- a chuck according to the preamble of claim 1 is for Example known from DE-U-9 403 686.
- the invention has for its object a generic To create a chuck where the use of balls as a locking member acting on the shaft end can be.
- the socket transverse to its longitudinal direction to the desired one Saw depth, whereby here the manufacturing tolerances without adverse effects on the functioning many times over can be larger.
- the width of the wall slot becomes determined by the choice of an appropriate saw blade, the slot width being slightly larger than the maximum Width of the bow piece is.
- the bow piece used is in terms of its curvature and its Dimensions designed so that it with its ends End faces without bit inserted into the socket on the Cut surfaces of the wall slot rests and its outer Circumference slightly below the outer circumference of the socket comes to lie.
- the elbow is pressed in the radial direction to the outside, where it is then through the Movement of the sleeve is applied against the clamping surface the bow piece in turn against the shaft or its corner recesses or presses engagement grooves and locks them.
- the chuck Sleeve in the longitudinal direction of the bush against the force of a coil spring movable.
- the inner diameter of the sleeve has one the conical taper forming the clamping surface under the action of the spring force automatically against the bow piece sets. This is a final locking of the used Bits only possible through a deliberate shift of the sleeve.
- Chucks can totally depend on the use of a spring to be dispensed with.
- the sleeve is in the circumferential direction the socket is rotatable and has an eccentric cross-sectional widening their inner cross-section. Through a this cross-sectional widening comes about by correspondingly turning the sleeve to lie over the arch piece so that it retreat can and an insertion or removal of the bit is possible.
- the arc piece can be made part-circular be so that it is inexpensive made of spring steel Tension rings can be made and a circular Has cross section.
- the chucks according to the invention are extremely durable because the bow piece used can deform elastically and there is practically no wear.
- the manufacturing tolerances too with regard to the clamping surface to be trained are in contrast essential to chucks with balls as thrust pieces easier to adhere to.
- the bend is preferably in two-point system the prism-like surfaces of the corner recesses of the shaft end in a C version of the bit. Since the length of the arch piece or the wall slot is preferred is chosen so that the arch piece at least two Overlapping edges of the shaft end results in an excellent Locking and centering effect in the socket.
- the elbow is included an E version in a line or area system on the rotating one Engaging groove of the shaft end.
- the chuck according to the invention can therefore be used for all commercially available Bits, of course also for those without an engagement groove or corner cutouts.
- the socket also has the definition of the height of the Shaft end preferably an inner permanent magnet, whose magnetic force is transferred to the screw head via the bit transmits, which then no longer drops from the bit in the loose state.
- the chuck according to the invention can also be used for tool applications can be used as z. B. from German Utility model 295 01 859.3 are known.
- the inner recording 6 the cross-sectional area of the socket 2 corresponds to the cross-section of the shaft 3, which is designed as a hexagon.
- the bow piece 9 has a circular cross section and is with respect to its arc length or curvature chosen so that it If the screwdriver bit 4 is not inserted, do not insert it into the holder 6 of the socket 2 can fall.
- the compression spring 12 is arranged in a circumferential spring groove 13, by an upper shoulder 14 and a lower one. Shoulder 15 is limited.
- the z. B. is designed as a 0-ring or snap ring, the Sleeve 5 additionally secured.
- FIG. 2 illustrates like the bow piece 9 under the action of the clamping surface 11 in the corner recesses of the shaft end 3 of the screwdriver bit 4 engages.
- the bow piece 9 has with respect to the shaft end 3 in the illustrated Position has a locking effect since it is in two engages adjacent corner recesses of the shaft end 3.
- a spring can be dispensed with.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Description
- Fig. 1
- einen Längsschnitt durch ein erfindungsgemäßes Spannfutter mit konischer Spannfläche,
- Fig. 2
- einen Schnitt durch das Spannfutter gem. Fig. 1 in Richtung I-I,
- Fig. 3
- einen Längsschnitt durch ein Spannfutter, dessen Spannhülse eine exzenterartige Querschnittsaufweitung aufweist und
- Fig. 4
- einen Schnitt durch die Spannhülse gem. Fig. 3.
- 1
- Spannfutter
- 2
- Buchse
- 3
- Schaftende
- 4
- Schraubendreherbit
- 5
- Hülse, Spannhülse
- 6
- Aufnahme
- 7
- Wandung
- 8
- Schlitz
- 9
- Bogenstück
- 10
- Außenumfang
- 11
- Spannfläche
- 12
- Feder
- 13
- Federnut
- 14
- obere Schulter
- 15
- untere Schulter
- 16
- Schulter
- 17
- Nut
- 18
- Sicherungsring
- 19
- Spannfutter
- 20
- Spannhülse
- 21
- Querschnittsaufweitung
- 22
- Bogenstück
- 23
- Buchse
Claims (12)
- Spannfutter für Schaftenden von Werkzeugeinsatzstücken, insbesondere von sechskantigen Schraubendreherbits mit schaftseitigen Eckaussparungen oder umlaufenden Eingriffsnuten, mit einer das Schaftende (3) aufnehmenden Buchse (2), deren innerer Querschnitt dem Querschnitt des Schaftendes (3) entspricht und mindestens einem auf das Schaftende (3) durch die Bewegung einer auf der Buchse (2) sitzenden Hülse (5) einwirkenden, begrenzt bewegbarem Arretierorgan (9,22), das in einem Wandungsdurchbruch (8) der Buchse (2) angeordnet ist, wobei die Hülse (5) in Längs- und/oder Umfangsrichtung der Buchse (2) bewegbar und mit mindestens einer Spannfläche (11) gegen das Arretierorgan (9,22) zu dessen Einwirkung auf das Schaftende (3) anlegbar ist, wobei der Wandungsdurchbruch zur Aufnahme des Arretierorgans als quer zur Längsrichtung der Buchse (2, 23) ausgebildeter Schlitz (8) ausgebildet ist, dadurch gekennzeichnet, daß das Arretierorgan als im Schlitz (8) der Buchse (2, 23) sitzendes Bogenstück (9, 22) ausgebildet ist.
- Spannfutter nach Anspruch 1, dadurch gekennzeichnet, daß die Hülse (5) in Längsrichtung der Buchse (2) gegen die Kraft einer Spiralfeder (12) begrenzt bewegbar ist und sich der innere Durchmesser der Hülse (5) über mindestens einen Teilbereich ihrer Längserstreckung zur Bildung der Spannfläche (11) konisch verjüngt, wobei sich die Spannfläche (11) unter der Wirkung der Federkraft der Spiralfeder (12) selbsttätig gegen das Bogenstück (9) anlegt.
- Spannfutter nach Anspruch 1, dadurch gekennzeichnet, daß die in Umfangsrichtung der Buchse (23) bewegbare Spannhülse (20) mindestens eine exzenterartige Querschnittsaufweitung (21) ihres inneren Querschnittes aufweist, die ein Zurückweichen des Bogenstückes (22) ermöglicht.
- Spannfutter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die umfängliche Länge des Schlitzes (8) größer als die Bogenlänge des Bogenstückes (9, 22) ist.
- Spannfutter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Bogenlänge des Bogenstückes (9, 22) derart gewählt ist, daß es mindestens zwei Eckkanten des Schaftendes (3) übergreift.
- Spannfutter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Bogenstück (9, 22) teilkreisförmig ausgebildet ist.
- Spannfutter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Bogenstück (9, 22) aus Federstahl besteht.
- Spannfutter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Bogenstück (9, 22) einen kreisförmigen Querschnitt aufweist.
- Spannfutter nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Bogenstück (9, 22) in Zweipunktanlage zu den prismenartig zueinander stehenden Flächen der Eckaussparungen des Schaftendes (3) liegt.
- Spannfutter nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Bogenstück (9, 22) in Linien- oder Flächenanlage liegt an der umlaufenden Eingriffsnut des Schaftendes.
- Spannfutter nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß im Inneren der Buchse ein die Höhenlage des Werkzeugeinsatzstückes bzw. des Schaftendes festlegender Permanentmagnet vorgesehen ist.
- Spannfutter nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Buchse eine über die Aufnahme (6) für das Schaftende (3) hinausgehende, gegenüber der Aufnahme (6) querschnittsverengte mittige Bohrung aufweist.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE1997/001650 WO1999006187A1 (de) | 1997-07-31 | 1997-07-31 | Spannfutter mit bogenstück |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0999921A1 EP0999921A1 (de) | 2000-05-17 |
EP0999921B1 true EP0999921B1 (de) | 2002-02-20 |
Family
ID=6918526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97936598A Expired - Lifetime EP0999921B1 (de) | 1997-07-31 | 1997-07-31 | Spannfutter mit bogenstück |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0999921B1 (de) |
DE (1) | DE59706467D1 (de) |
DK (1) | DK0999921T3 (de) |
WO (1) | WO1999006187A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50015267D1 (de) * | 2000-04-05 | 2008-08-28 | Infineon Technologies Ag | Verfahren zur störanteilsfreien Bilderfassung mittels eines elektronischen Sensors |
DE102012103678B4 (de) * | 2012-04-26 | 2019-10-10 | Wera Werkzeuge Gmbh | Futter zur Aufnahme eines Schraubendrehereinsatzes |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4207337C1 (de) * | 1992-03-07 | 1993-06-09 | Helfer & Co Kg, 3260 Rinteln, De | |
DE4336376C2 (de) * | 1992-10-24 | 1997-08-07 | Schmidt Ulrich Ush Schraubwerk | Spannfutter für Werkzeug-Einsatzstücke |
DE4243650C2 (de) * | 1992-12-23 | 1996-07-25 | Schmidt Ulrich Ush Schraubwerk | Spannfutter für Werkzeug-Einsatzstücke |
DE9403686U1 (de) * | 1994-03-04 | 1994-06-09 | Fa. Robert Schröder, 42369 Wuppertal | Einsteckhalterung für Werkzeugeinsätze, insbesondere Schraubendreherbits |
DE29501859U1 (de) * | 1995-02-06 | 1995-03-23 | Ush Schraubwerkzeugfabrik Ulrich Schmidt, 57271 Hilchenbach | Drehantreibbarer Werkzeugeinsatz |
US5722805A (en) * | 1995-12-08 | 1998-03-03 | Giffin; Brian K. | Drill bit adaptor tool |
-
1997
- 1997-07-31 DE DE59706467T patent/DE59706467D1/de not_active Expired - Fee Related
- 1997-07-31 DK DK97936598T patent/DK0999921T3/da active
- 1997-07-31 WO PCT/DE1997/001650 patent/WO1999006187A1/de active IP Right Grant
- 1997-07-31 EP EP97936598A patent/EP0999921B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59706467D1 (de) | 2002-03-28 |
EP0999921A1 (de) | 2000-05-17 |
DK0999921T3 (da) | 2002-05-27 |
WO1999006187A1 (de) | 1999-02-11 |
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