EP0579580A1 - Outil et mandrin pour outil portatif - Google Patents

Outil et mandrin pour outil portatif Download PDF

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Publication number
EP0579580A1
EP0579580A1 EP93810491A EP93810491A EP0579580A1 EP 0579580 A1 EP0579580 A1 EP 0579580A1 EP 93810491 A EP93810491 A EP 93810491A EP 93810491 A EP93810491 A EP 93810491A EP 0579580 A1 EP0579580 A1 EP 0579580A1
Authority
EP
European Patent Office
Prior art keywords
tool
flanks
towards
central axis
driving groove
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
EP93810491A
Other languages
German (de)
English (en)
Other versions
EP0579580B1 (fr
Inventor
Reinhard Dr. Schulz
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 EP0579580A1 publication Critical patent/EP0579580A1/fr
Application granted granted Critical
Publication of EP0579580B1 publication Critical patent/EP0579580B1/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

Definitions

  • the invention relates to a tool for insertion into a tool holder for chiselling and / or impact drilling hand tool devices with a clamping shank which has at least one axially closed locking groove and at least one rotational driving groove open axially towards the free end of the clamping shaft with two essentially radially extending flanks.
  • 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 which serves to hold these tools, has, according to the number of locking grooves present, radially displaceable locking elements, which in the present case are in the form of balls. Instead of such balls, it is also known to design the locking elements in the form of rollers. The interaction of these locking elements with the axially closed locking grooves results in a positive connection between the tool and the tool holder. By radially disengaging the locking elements, this positive connection can be canceled so that the tools can be removed from the tool holder.
  • the above-mentioned locking grooves, together with the locking elements interacting with them, are not subject to particularly high stresses, since in operation the tool located in the tool holder is practically floating relative to the locking elements, ie the locking elements cooperate with the Locking grooves to transmit no significant forces during operation. Only when pulling the tool out of a hole in components are certain axial forces to be transmitted via the locking grooves in cooperation with the locking elements to ensure that the connection between the tool and the tool holder remains.
  • the invention has for its object to provide a tool which, in particular in cooperation with a suitable tool holder, is not susceptible to wear and tear in such a way that reliable torque transmission is ensured over a longer period of time.
  • the object is achieved in that at least the drive-side flank of the rotary driving groove unites to the free end of the clamping shaft has increasing distance from the central axis of the rotary driving groove.
  • the design according to the invention leads to the fact that the rotary driving groove of the clamping shaft has a clear width that widens towards the free end. It can be an extension of any kind, i.e. it can run continuously or in stages. The only decisive factor is that the resulting contour of the driving groove represents an extension towards the free end of the clamping shank.
  • both flanks of the rotary driving groove have a distance from the central axis of the rotating driving groove that increases towards the free end of the clamping shaft. This makes it possible to form the rotary driving groove symmetrically with respect to its central axis. The expansion can in turn proceed in any way.
  • a practical design of the rotary driving groove can be found if the flanks run rectilinearly and at an angle that opens towards the free end of the clamping shaft, which leads to the fact that ultimately the distance between the flanks and the central axis of the rotating driving groove increases evenly.
  • the amounts of these angles can preferably range between 1 ° and 10 °.
  • the tool holder has at least one radially displaceable locking element which interacts with the locking groove and at least one driving bar which interacts with the rotary driving groove and projects into the receiving opening, the driving-side flank of which leads to the mouth of the Receiving opening has a decreasing distance from the central axis of the driving bar.
  • the width of the driving ledges towards the receiving opening can be reduced as desired, ie continuously or also gradually.
  • the resulting contour ultimately results in a reduction in the width of the carrier strips towards the mouth of the receiving opening.
  • both flanks of the carrier strips have a distance from the central axis of the carrier strips that decreases towards the mouth of the receiving opening. In a way, this creates a symmetrical profile of the carrier bars.
  • flanks of the carrier strips can run in a straight line at an angle that closes toward the mouth of the receiving opening, which means that the distance between the flanks and the central axis of the carrier strips decreases evenly towards the mouth of the receiving opening.
  • either only the flank on the driving side or both flanks of the driving ledges can run at the angle described.
  • both flanks of the carrier strips run at the same angle, the amount of the angle between the flank and the central axis again being able to move in the range between 1 ° and 10 °.
  • FIGS 1 and 2 show a clamping shank 1 of a tool according to the invention.
  • This clamping shaft 1 has two locking grooves 2 and two rotational driving grooves 3 which are open axially towards the free end of the clamping shaft 1.
  • the rotary driving grooves 3 have essentially radially extending flanks 3a.
  • the flanks 3a of the rotary driving groove 3 are inclined at an angle a to the central axis m of the rotating driving groove 3.
  • the angles a are open towards the free end of the clamping shaft, so that the clear width of the rotary driving groove 3 increases towards the free end of the clamping shaft 1.
  • the amount of both angles a can be the same, so that the rotary driving groove 3, as in the example shown, has a symmetrical shape, the size of the angles a being able to vary between 1 ° and 10 °.
  • Figures 3 and 4 show a guide 4 of a tool holder, not shown.
  • the guide 4 forms the direct connecting part of the tool holder towards the clamping shank of the tools to be used.
  • the guide 4 has driver strips 5 which protrude into the receiving opening 4a.
  • the flanks 5a of the driving bars 5 are each inclined at an angle b to the central axis M of the driving bars 5. These angles b close to the mouth of the receiving opening 4a. This results in driver strips 5, the width of which decreases towards the mouth of the receiving opening 4a.
  • FIGS. 3 and 4 also show how the guide 4 is penetrated by through openings 6.
  • These passage openings 6 serve the passage of known per se and therefore here not shown in the drawing, assigned to the tool holder locking elements which come into engagement with the locking grooves 2 of the clamping shaft 1 in order to fix the tool axially.
  • the passage openings 6 and the carrier strips 5 are arranged approximately diametrically opposite one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
EP19930810491 1992-07-10 1993-07-08 Outil et mandrin pour outil portatif Expired - Lifetime EP0579580B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924222743 DE4222743A1 (de) 1992-07-10 1992-07-10 Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte
DE4222743 1992-07-10

Publications (2)

Publication Number Publication Date
EP0579580A1 true EP0579580A1 (fr) 1994-01-19
EP0579580B1 EP0579580B1 (fr) 1996-05-22

Family

ID=6462949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930810491 Expired - Lifetime EP0579580B1 (fr) 1992-07-10 1993-07-08 Outil et mandrin pour outil portatif

Country Status (3)

Country Link
EP (1) EP0579580B1 (fr)
DE (2) DE4222743A1 (fr)
DK (1) DK0579580T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2537611A1 (fr) * 2010-02-15 2012-12-26 Kabushiki Kaisha Miyanaga Dispositif d'installation et de retrait d'outil de rotation et outil de rotation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19507567A1 (de) * 1995-03-03 1996-09-05 Drebo Werkzeugfab Gmbh Bohrer
DE10061071C1 (de) * 2000-11-20 2002-04-25 Hubert Drohmann Einrichtung zur Einführhilfe für bohrende Werkzeuge sowie Verfahren und Werkzeug zur Herstellung einer Einführhilfe

Citations (2)

* 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
FR2562969A1 (fr) * 1984-04-11 1985-10-18 Peugeot Dispositif de liaison coulissante a cannelures et application de ce dispositif a un embrayage

Patent Citations (2)

* 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
FR2562969A1 (fr) * 1984-04-11 1985-10-18 Peugeot Dispositif de liaison coulissante a cannelures et application de ce dispositif a un embrayage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2537611A1 (fr) * 2010-02-15 2012-12-26 Kabushiki Kaisha Miyanaga Dispositif d'installation et de retrait d'outil de rotation et outil de rotation
EP2537611A4 (fr) * 2010-02-15 2014-07-09 Miyanaga Kk Dispositif d'installation et de retrait d'outil de rotation et outil de rotation

Also Published As

Publication number Publication date
DK0579580T3 (da) 1996-10-07
DE4222743A1 (de) 1994-01-13
EP0579580B1 (fr) 1996-05-22
DE59302662D1 (de) 1996-06-27

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