EP0614731A1 - Outil et mandrin pour outil à main - Google Patents

Outil et mandrin pour outil à main Download PDF

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Publication number
EP0614731A1
EP0614731A1 EP93810892A EP93810892A EP0614731A1 EP 0614731 A1 EP0614731 A1 EP 0614731A1 EP 93810892 A EP93810892 A EP 93810892A EP 93810892 A EP93810892 A EP 93810892A EP 0614731 A1 EP0614731 A1 EP 0614731A1
Authority
EP
European Patent Office
Prior art keywords
tool
rotary driving
tool holder
rotary
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.)
Granted
Application number
EP93810892A
Other languages
German (de)
English (en)
Other versions
EP0614731B1 (fr
Inventor
Michael Selb
Heinrich Pauli
Axel Neukirchen
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 EP0614731A1 publication Critical patent/EP0614731A1/fr
Application granted granted Critical
Publication of EP0614731B1 publication Critical patent/EP0614731B1/fr
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
    • 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
    • Y10T279/17068—Rotary socket
    • 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
    • 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
    • Y10T408/94—Tool-support
    • Y10T408/95—Tool-support with tool-retaining means
    • Y10T408/953—Clamping jaws

Definitions

  • the invention relates to a tool for inserting into a tool holder for chiseling, rotary drilling and / or rotary impact drilling hand tool devices with a circular clamping shank, which has at least one axially closed locking groove and at least one rotational driving groove open axially towards the free end.
  • Tools and tool holder for hand tools are known from DE-PS 25 51 125, the clamping shank of these tools having one or two axially closed locking grooves and one or two rotational driving grooves open axially towards the free end of the clamping shaft.
  • the tool holder serves to hold these tools and, according to the number of locking grooves, has locking bodies which can be displaced radially and which are designed, for example, in the form of balls.
  • the locking bodies serve to prevent the tools from falling out of the tool holder.
  • the locking bodies can be displaced radially in such a way that they disengage from the locking grooves.
  • the axial driving grooves which are open towards the free end of the clamping shaft, into the corresponding rotating driving bars are subject to very high loads of the tool holder. These rotary driving grooves together with the rotating driving bars are responsible for the entire torque transmission during the operation of the tool.
  • the weakness of the known tools and tool holders lies in the wear of the turning driver grooves and the turning driver bars. Particularly on the flank on the entraining side, ie on the flank which is upstream in the direction of rotation but faces away from the direction of rotation, an extraordinarily high degree of wear occurs.
  • the reason for this wear and tear is the high torque to be transmitted and the constant relative displacement of the flanks of the rotary driving grooves with respect to the flanks of the rotating driving bars.
  • This relative offset arises in particular from the action of an impact load on the tool during measurement or rotary impact drilling.
  • the wear on the rotary driving grooves on a tool is deflected to such an extent that reliable torque transmission is no longer possible even before the actual operating wear of the tool's working area. This inevitably leads to an expensive replacement of such a tool.
  • the invention has for its object to provide a tool that shows no harmful wear when interacting with a suitable tool holder, so that a reliable torque transmission is guaranteed.
  • the object is achieved in that the clamping shaft has, at least in the peripheral region of the locking groove, a rotary driving surface which is open towards the free end of the clamping shaft and runs parallel to the longitudinal axis of the clamping shaft.
  • the rotary driving surface according to the invention forms an additional transmission surface for the transmission of the torque while avoiding a cross-sectional weakening which has a detrimental effect on the strength of the tool. Because the circumferential area of the clamping shaft, in which the locking groove is located, is essentially overlaid by the rotary driving surface, there is no reduction in the rotary driving groove. The essentially radially running flanks of the rotary driving grooves, which serve for torque transmission, are retained in their full size. At least part of the locking groove remains obtained by arranging the rotary driving surface on the clamping shaft.
  • the decreasing stop surface of the locking groove for the axial holding of the tool due to the arrangement of the rotary driving surface is nevertheless so large that the connection between the tool and the tool holder is ensured when the tool is pulled out of a bore in a component through the interaction of the locking body and locking groove.
  • the rotary driving surface is preferably designed to be flat.
  • Flat surfaces have the advantage that they are easy and economical to manufacture.
  • the rotating driving surface is convex.
  • the cross section of a clamping shank is only slightly weakened by the arrangement of a convexly designed rotary driving surface and the stop surface of the locking groove for the axial holding of the tool is only slightly smaller.
  • Another possibility is to make the rotary driving surface concave. The forces acting on a convex or concave rotary driving surface, which are necessary to set the tool in rotary motion, thus act on a larger surface. This results in a lower surface pressure, which has an extremely positive effect on the wear behavior of the clamping shank.
  • the rotating driving surface preferably consists of two partial surfaces that extend in the manner of a roof. An optimal size of these areas is achieved when the apex of the partial areas is expediently on the circumference of the clamping shaft.
  • the partial areas can have different sizes and different apex angles.
  • an apex angle which is expediently 120 ° to 150 °, has proven itself.
  • the required rotary driving grooves and the locking grooves are to some extent a cross-sectional weakening of the clamping shaft.
  • the rotary driving surface is opposite the locking groove is arranged such that the locking groove and the rotary driving surface have overlapping axes of symmetry.
  • the clamping shaft expediently has two diametrically opposed locking grooves and two rotary driving surfaces.
  • the rotary driving surfaces run parallel to each other.
  • the torque transmission thus serve two rotary driving surfaces and the driving flanks of the rotary driving grooves, which run essentially radially.
  • the rotary driving surfaces are symmetrical.
  • the rotary driving surfaces are preferably designed such that the length of the rotating driving surface is greater than the length of the locking groove. The entire surface of those areas of the rotary driving surface which project beyond the locking groove serve for torque transmission.
  • the above-mentioned trained tools have the advantage that they can be used in a conventional tool holder, for example in accordance with DE-PS 25 51 125. In this case, a loss must be accepted, since higher proportions of torques are not transferable, and the rotary driving surfaces remain without function.
  • the circular receiving opening of such a tool holder has at least one rotary driving bar for a rotating driving groove and at least one radially displaceable locking body for a locking groove of the tool.
  • the torque to be transmitted can be increased if the tool is inserted into a tool holder according to the invention with a receiving opening which preferably has at least one counter surface for the rotary driving surface of the tool in the area of the locking body.
  • An additional torque transmission from the tool holder to the clamping shank of the tool is achieved by means of a corresponding counter surface of the tool holder which is matched to the rotary driving surface of the tool not only possible via the rotary drive bar in connection with the rotary drive groove, but also via the counter surface in connection with the rotary drive surface.
  • the counter surface is advantageously designed to be flat.
  • Flat surfaces have the advantage that they are easy and economical to manufacture.
  • this is preferably concave.
  • the cross section of the receiving opening is reduced by the arrangement of a concave counter surface and the wall thickness of the tool holder increases in the area of the counter surfaces. In this way, an overall stable tool holder is achieved.
  • the receiving opening can also be designed such that the counter surface of the receiving opening is advantageously convex. Both concave and convex counterparts are particularly well suited for the transmission of large forces which are necessary to set the tool in rotary motion, since the forces are distributed over a larger area. This results in a lower surface pressure, which has a positive effect on the wear behavior of the tool holder.
  • the counter surface preferably consists of two partial surfaces running in the shape of a roof. This provides a sufficiently large stop for the locking body of the tool holder.
  • the apex of the partial surfaces preferably lies on the circular contour of the receiving opening, an apex angle of 120 ° to 150 ° having also proven particularly useful.
  • the guide of the tool holder has an essentially radially extending through hole, which serves to receive the locking body and in which the locking body can be displaced essentially radially.
  • the locking body and the counter surface are arranged in such a way that they have overlapping axes of symmetry.
  • the tool holder expediently has two locking bodies diametrically opposite one another and two diametrically opposite one another arranged counter surfaces.
  • Such a tool holder is particularly well suited for the transmission of high torques, since two counter surfaces are arranged in addition to the rotary driver. This divides the force that occurs so that there is less surface pressure between the individual, interacting surfaces.
  • the counter surfaces of the tool holder are designed symmetrically so that the forces generated during the torque transmission can act in a substantially uniformly distributed manner on the circumference of the insert shaft of the tool.
  • the torque is thus transmitted via the rotary drive bars in connection with the rotary drive grooves and the counter surfaces in connection with the rotary drive surfaces.
  • 1 to 4 and 6, 7 each show a clamping shank A, B, C, D of a tool.
  • the clamping shaft A, B, C, D has two axially closed locking grooves 1, 11, 21, 31 and two rotary driving grooves 2, 12, 22, 32 which are open axially towards the free end of the clamping shaft A, B, C, D. How in particular 2, 3, 4 and 7 show, the flanks 2a, 2b, 12a, 12b, 22a, 22b, 32a, 32b of the rotary driving grooves 2, 12, 22, 32 run essentially radially.
  • FIG. 1 shows a length ratio between the length L of the rotary driving surface 3 and the length V of the locking groove 1. Those areas of the rotating driving surface 3 which project beyond the locking groove 1 serve with their entire surface for torque transmission.
  • the clamping shank A is provided with two symmetrically designed rotary driving surfaces 3 that run parallel to one another. These rotary driving surfaces 3 are flat and extend in the longitudinal direction of the clamping shaft A.
  • the clamping shaft B shown in FIG. 3 shows two symmetrical, convexly designed rotary driving surfaces 13. These rotating driving surfaces 13 extend in the longitudinal direction of the clamping shaft.
  • the locking grooves 11 and the rotary driving surfaces 13 have overlapping axes of symmetry.
  • FIG. 4 shows a clamping shaft C with two symmetrical, concave rotary driving surfaces 23 which extend in the longitudinal direction of the clamping shaft C.
  • the locking grooves 21 and the rotary driving surfaces 23 have overlapping axes of symmetry.
  • FIG. 5 schematically shows a section through a tool holder into which the clamping shank A of the tool according to FIGS. 1 and 2 with locking grooves 1, rotary driving grooves 2 and rotating driving surfaces 3 is inserted.
  • the tool holder has a guide 7, an actuating sleeve 8 and a cage 9 encompassing the actuating sleeve 8.
  • a recess By displacing the actuating sleeve 8, either axially or in the circumferential direction, a recess, not shown in the example shown, can be brought into a radial projection of the locking body 5, so that the in a radially extending through bore 10 displaceable locking body 5 can disengage from the locking groove 1 and thereby releases the clamping shaft A, so that the clamping shaft A of the tool can be removed from the guide 7 and thus the tool from the tool holder.
  • the guide 7 has rotary driving bars 4 which are provided with essentially radially extending flanks 4a, 4b.
  • the clamping shank D shown in FIG. 6 shows a rotary driving surface 33, which consists of two partial surfaces 33a, 33b arranged in a roof-like manner with respect to one another.
  • the length of the partial surfaces 33a, 33b project beyond the locking groove 31 in the longitudinal direction of the clamping shaft D in both directions. That part, the partial surfaces 33a, 33b, which projects axially beyond the locking groove serves with its entire surface for torque transmission.
  • the partial surfaces 33a, 33b of the rotary driving surface 33 extend over part of the length of the clamping shank D.
  • the angle W of the partial surfaces 33a, 33b arranged in a roof shape relative to one another is 120 ° to 150 °.
  • the partial surfaces 33a, 33b are formed symmetrically to one another.
  • the locking grooves 31 and the rotary driving surfaces 33 have covering axes of symmetry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Jigs For Machine Tools (AREA)
  • Drilling Tools (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Fats And Perfumes (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Manipulator (AREA)
EP93810892A 1993-03-06 1993-12-20 Outil et mandrin pour outil à main Expired - Lifetime EP0614731B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4307161 1993-03-06
DE4307161 1993-03-06
DE4313578 1993-04-26
DE4313578A DE4313578A1 (de) 1993-03-06 1993-04-26 Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte

Publications (2)

Publication Number Publication Date
EP0614731A1 true EP0614731A1 (fr) 1994-09-14
EP0614731B1 EP0614731B1 (fr) 1997-03-05

Family

ID=25923718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810892A Expired - Lifetime EP0614731B1 (fr) 1993-03-06 1993-12-20 Outil et mandrin pour outil à main

Country Status (14)

Country Link
US (1) US5427481A (fr)
EP (1) EP0614731B1 (fr)
JP (1) JPH06297218A (fr)
KR (1) KR100287511B1 (fr)
CN (1) CN1041697C (fr)
AT (1) ATE149404T1 (fr)
CA (1) CA2116936A1 (fr)
DE (2) DE4313578A1 (fr)
DK (1) DK0614731T3 (fr)
ES (1) ES2098018T3 (fr)
FI (1) FI941038A (fr)
HU (1) HU216755B (fr)
PL (1) PL172785B1 (fr)
TW (1) TW229171B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4338953A1 (de) * 1993-11-15 1995-05-18 Krupp Widia Gmbh Spannvorrichtung zur Verbindung eines Werkzeugkopfes und eines Werkzeughalters an Werkzeugmaschinen
DE4400969A1 (de) * 1994-01-14 1995-07-20 Bosch Gmbh Robert Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen
DE19507567A1 (de) * 1995-03-03 1996-09-05 Drebo Werkzeugfab Gmbh Bohrer
DE19537561A1 (de) * 1995-10-09 1997-04-10 Hilti Ag Werkzeughalter
US5984596A (en) * 1995-10-12 1999-11-16 Robert Bosch Gmbh Insertable tool and tool holder for drilling and/or impacting electric machines
DE10311455B3 (de) * 2003-03-15 2004-09-16 Aesculap Ag & Co. Kg Kupplung für ein chirurgisches Drehantriebs-Handstück
DE10338640A1 (de) * 2003-08-22 2005-03-17 Hilti Ag Einsteckende für ein drehendes und schlagendes Werkzeug
EP1535704B1 (fr) * 2003-11-26 2010-03-10 HILTI Aktiengesellschaft Porte-outil pour un outil rotatif à percussion
DE10357380A1 (de) * 2003-12-05 2005-06-30 Hilti Ag Einsteckende für ein drehendes und/oder schlagendes Werkzeug
US20050285355A1 (en) * 2004-06-24 2005-12-29 Yuan-Ho Lin Quick removable chuck assembly and its cutting tool
DE102013100104B4 (de) 2013-01-08 2022-08-11 Kennametal Inc. Rotations-Schneidwerkzeug und Werkzeugeinheit
PL424162A1 (pl) * 2018-01-03 2019-07-15 Przedsiębiorstwo Produkcyjno-Handlowo-Usługowe Raf Spółka Cywilna Chwyt do mocowania zwłaszcza wierteł w systemie SDS

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2551125A1 (de) * 1975-11-14 1977-05-26 Bosch Gmbh Robert Einrichtung zur drehmomentuebertragung
EP0195260A2 (fr) * 1985-03-20 1986-09-24 Röhm GmbH Mandrin et outil de forage pour forage à rotation et rotation-percussion
US4900202A (en) * 1988-09-08 1990-02-13 Wienhold James L Chuck assembly for tool bits
EP0500489A2 (fr) * 1991-02-21 1992-08-26 HILTI Aktiengesellschaft Outil et porte-outil pour machine à main

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2393424A (en) * 1945-01-11 1946-01-22 Howard I Selch Boring or like tool
DE4137120A1 (de) * 1991-11-12 1993-05-13 Hilti Ag Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
DE4141846A1 (de) * 1991-12-18 1993-06-24 Hilti Ag Werkzeug zum schlagbohren und meisseln und werkzeugaufnahme fuer diese werkzeuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2551125A1 (de) * 1975-11-14 1977-05-26 Bosch Gmbh Robert Einrichtung zur drehmomentuebertragung
EP0195260A2 (fr) * 1985-03-20 1986-09-24 Röhm GmbH Mandrin et outil de forage pour forage à rotation et rotation-percussion
US4900202A (en) * 1988-09-08 1990-02-13 Wienhold James L Chuck assembly for tool bits
EP0500489A2 (fr) * 1991-02-21 1992-08-26 HILTI Aktiengesellschaft Outil et porte-outil pour machine à main

Also Published As

Publication number Publication date
JPH06297218A (ja) 1994-10-25
ATE149404T1 (de) 1997-03-15
ES2098018T3 (es) 1997-04-16
CN1107404A (zh) 1995-08-30
TW229171B (en) 1994-09-01
CN1041697C (zh) 1999-01-20
EP0614731B1 (fr) 1997-03-05
DE59305635D1 (de) 1997-04-10
HU216755B (hu) 1999-08-30
CA2116936A1 (fr) 1994-09-07
HUT69233A (en) 1995-08-28
PL172785B1 (pl) 1997-11-28
KR100287511B1 (ko) 2001-04-16
FI941038A (fi) 1994-09-07
US5427481A (en) 1995-06-27
FI941038A0 (fi) 1994-03-04
KR940021163A (ko) 1994-10-17
DK0614731T3 (da) 1997-09-15
HU9400663D0 (en) 1994-05-30
DE4313578A1 (de) 1994-09-08

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