EP0655299B1 - Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen - Google Patents
Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen Download PDFInfo
- Publication number
- EP0655299B1 EP0655299B1 EP94117161A EP94117161A EP0655299B1 EP 0655299 B1 EP0655299 B1 EP 0655299B1 EP 94117161 A EP94117161 A EP 94117161A EP 94117161 A EP94117161 A EP 94117161A EP 0655299 B1 EP0655299 B1 EP 0655299B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- locking
- locking body
- tool holder
- depth
- 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
- 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
- B25D2222/00—Materials of the tool or the workpiece
- B25D2222/54—Plastics
- B25D2222/57—Elastomers, e.g. rubber
-
- 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
- B25D2250/221—Sensors
-
- 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
- Y10T279/17085—Key retainer
-
- 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
- Y10T279/17761—Side detent
- Y10T279/17811—Reciprocating sleeve
-
- 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 is based on a device Hand machine tools for the rotary driving of striking and / or drilling tools according to the preamble of claim 1 as well as a tool and tool holder used.
- Such a device is known from DE-OS 25 51 125, wherein the mounting hole of the tool holder two each other has opposite rotary drive bars, which in corresponding Driving grooves in the shank of the tools used here intervention. There are also two of them there opposite, but to the rotary driving bars by about 90 ° staggered locking body provided in accordingly Snap the arranged, elongated troughs radially into the tool shank and the axially displaceable tool e.g. a hammer drill or chisel Secure against falling out or unintentional pulling out.
- a hammer drill or chisel Secure against falling out or unintentional pulling out.
- the axial locking of the tools is not adversely affected by the improved Drebmitglazed and so that it remains fully effective.
- the greater axial engagement length of the at least one Locking body in the locking recess of the tool shank compared to the locking balls used so far Tool guidance improved, especially with a lateral Pushing away or levering the tool is an advantage.
- FIG. 1 a tool holder of a hammer drill with inserted tool in longitudinal section in an enlarged view
- Figure 2 a Cross section of the tool holder according to II-II from Figure 1.
- Figure 3 shows as a further embodiment a cross section through a Tool shank according to III-III from Figure 4, which together with Figure 5 the insertion end of a tool shank with linear to the front represent increasing depth of the locking troughs.
- Figure 6 shows a longitudinal section through an appropriately trained Locking body including the tool holder.
- Figure 7 shows as Another embodiment is a cross section through a Tool holder with inserted tool shaft and Figure 8 shows a tool shank with a graduated depth of the locking recesses.
- the device according to the invention on machine tools Rotary driving of striking and / or drilling tools, especially on impact drills and hammer drills or Impact devices essentially consist of a tool holder 10 and a tool shaft 11 inserted therein for drilling and / or hitting the tool used 12.
- the tool holder 10 is seated non-rotatably at the end of a driven, hollow cylindrical Tool spindle 13 of a hammer drill 14.
- a striker 15 is added, which in known, not shown cyclically from a percussion mechanism to the Face of the tool shaft 11 is struck.
- Tool holder 10 consists essentially of a tubular tool holder 16 with a receiving bore 17 for the tool shank 11 and two openings 18 in the Tool holder 16 inserted locking bodies 19.
- Above the locking body 19 is concentric with the tool holder 16 a locking sleeve 20 arranged by a compression spring 21 Locking body 19 locked in the rest position shown.
- a sliding sleeve 22 firmly connected to the locking sleeve 20 Plastic, which the locking sleeve 20 and the compression spring 21st concentrically surrounds, is by hand against the force of the compression spring 21 axially displaceable backwards, whereby the locking body 19 are released in their radial movement, so that they Slide the tool shank 11 radially outwards can.
- the tool 12 is on the tool shaft 11 with two each other opposite rotary driving grooves 23 open towards the shaft end provided, in which two in the receiving bore 17 to the inside protruding, axially extending rotary driver 24 (see FIG. 6) intervention.
- the rotary drivers 24 are among the Locking body 19 on the circumference of the tool holder 16 by 90 ° arranged.
- Corresponding to the rotary driving grooves 23 the tool shank 11 two opposite, axially extending locking troughs 25 on the circumference of the tool shank 11 attached by 90 °.
- the locking troughs 25 already end in front of the rear end of the tool shank 11 so that the inside engaging locking body 19, the axial movement of the Limit tool 12 in tool holder 16.
- the locking troughs 25 of the tool shank 11 in its axial course, that they are deeper in the front area than in the rear area.
- the locking bodies 19 assigned to them are shown in FIG Tool holder 16 arranged radially displaceable such that it at the front of the locking troughs 25 - and thus in the Working position of the tool 12 - deeper into the Interlocking recesses 25 engage than in the rear area, i.e. in the idle position.
- the locking body 19 radially in its locked position by the locking sleeve 20 yielding to the outside in each case in the opening 18 of the Tool holder 16 guided by one between each Locking body 19 and the locking sleeve 20, a spring element 26 is arranged, which the locking body 19 radially inwards presses.
- the locking body 19 longer than wide or about half as much long as the locking troughs 25 are formed and in Viewed in axial direction except for the rounded ends, it is the same height and are of the same thickness. From Figure 2 it can be seen that the Locking troughs with increasing depth on their long sides have axially extending flat flank 27, which with a corresponding axially extending flat flank 28 on the long sides the locking body 19 to form the additional rotary drive work together. This increases the area or flank for the additional rotary driving compared to previously used Locking balls or rollers not only through a deeper one Immersion, but also by the length of the shoulder, so that the pressure on the rotary driving surfaces is reduced.
- FIGS device shows one Cross section through the tool shank 11a of a tool 12a in rear end region of the locking troughs 25a.
- FIG. 4 shows breakout of the tool shank 11a can be seen that the depth of the locking troughs 25a in this embodiment increases linearly from the rear to the front end.
- the one in Figure 5 by 90 ° Tool shaft 11a shown rotated also shows that the locking troughs 25a are the same over their entire axial length remain wide, so that here too with increasing depth of the Locking grooves flanks 27a for additional turning driving surrender.
- FIG Tool holder 16a only one locking body 19a provided what may be sufficient for weaker machine tools, especially since this solution is cheaper.
- the locking body 19a here formed or arranged in the tool holder 16a that the in the area of the locking troughs 25a engaging Locking body 19a axially increasing to the same extent to the front protrudes inward from the receiving bore 17a, like the depth of the Locking troughs 25 increases.
- the Shank length of the tool 12 is not to be increased as a result provided that the rotary driver 24 and the locking body 19th or 19a at the same height in the receiving bore 17 or 17a Start the tool holder and also in the same level of the Tool shank 11 and 11a starting rotary driving grooves 23 and Intervene locking troughs 25.
- FIG 7 is a cross section through a Tool holder 10b with a tool shaft 11b inserted therein Tool shows.
- a longitudinal groove 29 incorporated, in each of which a strip 30 on the 6 towards the front inwardly projecting locking body 19b as an additional Turning drive engages.
- the locking bodies 19b each sit in one radial opening 18 of the tool holder 16 by a Locking sleeve 20a is bordered concentrically.
- Locking body 19b As a spring element between locking body 19b and locking sleeve 20a is here one inserted in the opening 18 of the tool holder 16
- Full body 26a is provided, which consists of an elastically deformable Material such as rubber, plastic and the like is made.
- the Locking body 19b are located by means of the compressed Solid body 26a with a defined pressure on the shaft 11b in the Tool holder 16 inserted tool. About this pressure the relative movement of the tool is damped when idling. Of the Solid body 26a thus simultaneously serves as a damping body for the axial forward movement of the tool with so-called idle strokes Machine.
- Locking sleeve in the direction of the arrow preferably in the direction of rotation of the Tool, rotated so far relative to the tool holder 16 until each have a correspondingly wide and deep recess 31 on the Inside of the locking sleeve 20a over the respective solid body 26a arrives so that it can escape to the outside and the Locking body 19b releases.
- the Tool shaft 11b inserted or withdrawn into the tool holder 16 her be pushed out.
- the radial diving movement of the locking body when engaging in the tool shank can also be used to Controlling the impact performance of the hammer drill depending on the type of tool the locking recesses according to the type of tool are of different depths.
- Either the Immersion depth of a locking body by a sensor can be scanned or as in the exemplary embodiment according to FIG. 7 the pressure of the spring element designed as a solid body 26a the locking body 19b to control the impact strength of the Machine tool can be recorded by a sensor 32, the for example in the working position shown in FIG the inside of the locking sleeve 20a is attached.
- the sensor 32 acts on electronics, not shown Impact strength of the machine tool.
- the one with the full body 26a realized solution principle can of course also with an axially displaceable locking sleeve 20 with a corresponding Realize the axial arrangement of the recesses 31.
- the invention is not based on the illustrated embodiments limited.
- An improved is essential to the invention Rotational entrainment in the front section of the Interlocking recesses 25, 25a, 25b, 25c engaging deeper Locking body 19, 19a, 19b; the edges 27 and 28 on the sides of which are also radial or wedge-shaped or curved according to FIG. 7 can be trained.
Description
Claims (14)
- Aus einem Werkzeughalter (10) und einem darin eingesetzten Werkzeugschaft (11) bestehende Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von schlagenden und/oder bohrenden Werkzeugen, die zu ihrem Schaftende hin offene Nuten (23) zur Drehmitnahme aufweisen, in welche mindestens zwei in einer Aufnahmebohrung (17) des Werkzeughalters (10) nach innen vorstehende, axial verlaufende, vorzugsweise einander diametral gegenüberliegende Drehmitnehmer (24) eingreifen, wobei in einem zu den Drehmitnehmern (24) versetzten Umfangsbereich der Aufnahmebohrung (17) mindestens ein in einem radialen Durchbruch der Werkzeugaufnahme (16) nach außen nachgebend geführter Verriegelungskörper (19) in eine längliche, die Axialbewegung des Werkzeugs in der Werkzeugaufnahme begrenzende Verriegelungsmulde (25) im Werkzeugschaft eingreift und in dieser Position arretierbar ist, dadurch gekennzeichnet, daß die mindestens eine Verriegelungsmulde (25) des Werkzeugschaftes (11) in ihrer Axialerstreckung derart ausgebildet ist, daß sie im vorderen Bereich tiefer ist als im hinteren Bereich, so daß in der Arbeitsstellung des Werkzeugs (12) der ihr zugeordnete Verriegelungskörper (19) der Werkzeugaufnahme (16) in dem vorderen Bereich der Verriegelungsmulde (25) tiefer eingreift als in der Leerlaufstellung im hinteren Bereich.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Tiefe der mindestens einen Verriegelungsmulde (25) vom hinteren zum vorderen Ende hin linear zunimmt und daß der darin eingreifende Bereich des Verriegelungskörpers (19) in gleichem Maße nach vorn axial zunehmend aus der Aufnahmebohrung (17) radial nach innen vorsteht.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Tiefe der mindestens einen Verriegelungsmulde (25) nur im hinteren Bereich, vorzugsweise bis zur Hälfte der axialen Länge nach vorn hin zunimmt und im vorderen Bereich gleichbleibt, und daß der mindestens eine Verriegelungskörper (19) in Axialrichtung gesehen bis auf seine abgerundeten Enden gleich hoch und gleich breit bemessen ist.
- Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die mindestens eine Verriegelungsmulde (25) mit zunehmender Tiefe an ihren Längsseiten in Drehrichtung eine zumindest annähernd axial verlaufende ebene Flanke (27) aufweist, welche mit einer entsprechend axial verlaufenden ebenen Flanke (28) an den Längsseiten des Verriegelungskörpers (19) zur Bildung einer zusätzlichen Drehmitnahme zusammenwirkt.
- Werkzeug für eine Einrichtung nach dem Oberbegriff des Anspruchs 1, dadurch gekennzeichnet, daß die Tiefe der mindestens einen Verriegelungsmulde (25) des Werkzeugschaftes (11) vom hinteren zum vorderen Ende hin zunimmt und an ihrer insbesondere in Drehrichtung liegenden Längsseite mit zunehmender Tiefe eine zumindest annähernd axial verlaufende ebene Flanke (27) für eine zusätzliche Drehmitnahme aufweist.
- Werkzeug nach Anspruch 5, dadurch gekennzeichnet, daß zwei ebene Flanken (27) zu beiden Längsseiten der mindestens einen Verriegelungsmulde (25) parallel zueinander verlaufen.
- Werkzeug nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Tiefe der mindestens einen Verriegelungsmulde (25) vom hinteren Ende vorzugsweise bis zur Mitte zunimmt und von dort bis zum vorderen Ende gleichbleibt.
- Werkzeug nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Verriegelungsmulde (25c) mindestens zwei unterschiedlich tiefe Abschnitte aufweist, wobei der hintere flache Abschnitt (33) in den vorderen tieferen Abschnitt (34) weich übergeht.
- Werkzeughalter für eine Einrichtung nach dem Oberbegriff des Anspruchs 1, dadurch gekennzeichnet, daß der mindestens eine Verriegelungskörper (19) in seiner arretierten Position radial nach außen nachgebend in einer Ausnehmung (18) der Werkzeugaufnahme (16) geführt ist.
- Werkzeughalter nach Anspruch 9, dadurch gekennzeichnet, daß der mindestens eine Verriegelungskörper (19) in Axialrichtung länger als breit ist, wobei dessen Längsseiten als zueinander parallel verlaufende Flanken (28) in eine buckelförmig gewölbte radiale Innenseite übergehen.
- Werkzeughalter nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß zwischen dem mindestens einen Verriegelungskörper (19) und einer Arretierung (20) ein Federelement (26) angeordnet ist, welches den Verriegelungskörper (19) radial nach innen drückt.
- Werkzeughalter nach Anspruch 11, dadurch gekennzeichnet, daß das Federelement (26a) ein Vollkörper aus Gummi, Kunststoff oder einem ählich elastisch verformbaren Material besteht.
- Werkzeughalter nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, daß die Eintauchtiefe des mindestens einen Verriegelungskörpers (19) zur Steuerung der Schlagstärke der Werkzeugmaschine (14) abfühlbar ist.
- Werkzeughalter nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß der Druck des Federelementes (26a) auf den Verriegelungskörper (19b) zur Steuerung der Schlagstärke der Werkzeugmaschine von einem Sensor (32) aufnehmbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4340728 | 1993-11-30 | ||
DE4340728A DE4340728C1 (de) | 1993-11-30 | 1993-11-30 | Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0655299A2 EP0655299A2 (de) | 1995-05-31 |
EP0655299A3 EP0655299A3 (de) | 1995-09-06 |
EP0655299B1 true EP0655299B1 (de) | 1999-04-28 |
Family
ID=6503774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94117161A Expired - Lifetime EP0655299B1 (de) | 1993-11-30 | 1994-10-31 | Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen |
Country Status (6)
Country | Link |
---|---|
US (1) | US5558478A (de) |
EP (1) | EP0655299B1 (de) |
JP (1) | JPH07185913A (de) |
CN (1) | CN1046879C (de) |
DE (2) | DE4340728C1 (de) |
DK (1) | DK0655299T3 (de) |
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DE2811328C2 (de) * | 1978-03-16 | 1986-09-25 | Robert Bosch Gmbh, 7000 Stuttgart | Bohrfutter |
US4290720A (en) * | 1979-12-17 | 1981-09-22 | R. F. B. Engineering Inc. | Quick self-release and reload tooling device |
AT377459B (de) * | 1981-06-29 | 1985-03-25 | Siderurgie Fse Inst Rech | Verfahren zum koninuierlichen vergiessen von in einer kokille rotierendem schmelzfluessigem metall und vorrichtung zur durchfuehrung des verfahrens |
ES2026199T3 (es) * | 1986-12-17 | 1992-04-16 | Hilti Aktiengesellschaft | Aparato manual. |
DE4200643A1 (de) * | 1992-01-13 | 1993-07-15 | Hilti Ag | Werkzeug zum schlagbohren und meisseln und werkzeugaufnahme fuer diese werkzeuge |
-
1993
- 1993-11-30 DE DE4340728A patent/DE4340728C1/de not_active Expired - Fee Related
-
1994
- 1994-10-27 US US08/331,344 patent/US5558478A/en not_active Expired - Fee Related
- 1994-10-31 DK DK94117161T patent/DK0655299T3/da active
- 1994-10-31 EP EP94117161A patent/EP0655299B1/de not_active Expired - Lifetime
- 1994-10-31 DE DE59408169T patent/DE59408169D1/de not_active Expired - Fee Related
- 1994-11-21 JP JP6286916A patent/JPH07185913A/ja not_active Ceased
- 1994-11-29 CN CN94118967A patent/CN1046879C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59408169D1 (de) | 1999-06-02 |
JPH07185913A (ja) | 1995-07-25 |
US5558478A (en) | 1996-09-24 |
EP0655299A2 (de) | 1995-05-31 |
DK0655299T3 (da) | 1999-11-08 |
EP0655299A3 (de) | 1995-09-06 |
DE4340728C1 (de) | 1995-01-26 |
CN1046879C (zh) | 1999-12-01 |
CN1107768A (zh) | 1995-09-06 |
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