EP0542683A1 - Outil pour forage de frappe et porte-outil pour les outils de forage de frappe - Google Patents

Outil pour forage de frappe et porte-outil pour les outils de forage de frappe Download PDF

Info

Publication number
EP0542683A1
EP0542683A1 EP92810850A EP92810850A EP0542683A1 EP 0542683 A1 EP0542683 A1 EP 0542683A1 EP 92810850 A EP92810850 A EP 92810850A EP 92810850 A EP92810850 A EP 92810850A EP 0542683 A1 EP0542683 A1 EP 0542683A1
Authority
EP
European Patent Office
Prior art keywords
tool
grooves
locking
cross
rotary
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
EP92810850A
Other languages
German (de)
English (en)
Other versions
EP0542683B1 (fr
Inventor
Christian Kleine
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 EP0542683A1 publication Critical patent/EP0542683A1/fr
Application granted granted Critical
Publication of EP0542683B1 publication Critical patent/EP0542683B1/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
    • 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
    • Y10T279/17076—Spreading elements
    • 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

Definitions

  • the invention relates to a tool which has an essentially circular clamping shaft for insertion into a tool holder of a hand-held power tool intended for impact drilling, which is provided with at least two rotary driving grooves, the lateral flanks of which are loaded when drilling are not diametrically opposed to one another and which are used for the axial insertion of Rotary drivers of the tool holder open into the free end face of the clamping shank and two locking grooves, which are closed for receiving at least one locking body of the tool holder at least at their ends adjacent to the end face of the clamping shank to limit the axial movement of the tool or are reduced in cross section.
  • Tools of this type are known for example from DE-PS 3716915 and D-PA 3941646. Tools of this type are designed so that they can only be inserted into a tool holder in a very specific angular position.
  • the invention has for its object to design tools according to the type of the main claim so that the clamping shank is weakened less by the necessary locking grooves and rotary driving grooves.
  • the two locking grooves are not diametrically opposed to one another.
  • the two locking grooves advantageously enclose the smaller of the rotary driving grooves at an angle of less than 180 °. This design reduces the stress peaks that occur during impact drilling within the cross section of the clamping shank.
  • Another object of the invention is to design the clamping shank of the tool in such a way that the tool holder of the machine brings about a permanent and secure locking with only one locking body.
  • the tool must be designed in such a way that it can also be used in the most widely used heavy rotary hammer.
  • This hammer has two diametrically opposed locking bodies in the form of cylindrical rollers which also serve to transmit torque to the tool.
  • This double task is achieved according to the invention in a tool mentioned at the outset in that the locking grooves have different cross-sections and, in an advantageous embodiment, the areas of the lead which advance during drilling and which adjoin the circular clamping shank Locking grooves extend approximately point-symmetrically to one another at least over a part of the cross-sectional area.
  • the larger of the two locking grooves preferably has a cross-sectional shape that is not part of a circle.
  • the tool according to the invention with the enlarged cross-sectional area can thus be locked sufficiently securely in a newly developed, modern rotary hammer with the cost-saving solution of only one locking body and nevertheless be used in the aforementioned rotary hammers which are frequently found on the market.
  • the invention therefore also relates to a tool holder for percussion drilling tools with two diametrically opposite rotary drivers of different cross-section, which are provided for axial insertion in rotary driver grooves of tools and with at least one locking body which is guided in a recess in the tool holder and which is for insertion into one of the two locking grooves of the tool is provided.
  • the tool holder according to the invention is achieved in that an intermediate perpendicular established on the secant of the opening surface of the recess for the locking body directed towards the tool forms an angle unequal, preferably less than 90 °, with the intermediate perpendicular established on the secant of the smaller rotary driver.
  • the in the FIG. 1 and 2 shown clamping shaft 11 has two diametrically opposite rotary driving grooves 14, 15 with the loaded flanks 16, 17 of the rotary driving grooves 14, 15 and the offset locking grooves 12, 13.
  • the two locking grooves 12, 13 are not diametrically opposed .
  • the perpendicular bisectors built on the secants of the locking grooves 12, 13 enclose the smaller of the two rotary driving grooves 15 at an angle ⁇ that is less than 180 °.
  • the rotary driving grooves 14, 15 open into the free end surface 18 of the clamping shaft, so that the tool shaft can be axially inserted into a tool holder which has strip-shaped rotary drivers adapted to the grooves 14, 15. It is obvious that even with the greatest loads and heavy wear, the arrangement of the locking grooves 12, 13 shown leads to a more uniform distribution of the cross-sectional area and thus to a reduction in the voltage peaks and the risk of fatigue failure.
  • FIG. 3 and 4 differs from the first exemplary embodiment in that the locking groove 22 has a larger cross-sectional area than the locking groove 23.
  • FIG. 5 and 6 shown embodiment differs from that shown in FIG. 1-4 illustrated embodiments in that the locking groove 32 has a cross-sectional contour 39 which is not part of a circle, and whose regions 37, 38 of the locking grooves 32, 33 adjoining the circular clamping shaft run approximately point-symmetrically to one another at least over part of the cross-sectional area, so that this tool can also be used in a known rotary hammer machine in which the torque transmission can only take place by means of two cylindrical rollers, as is shown by the method shown in FIG. 6 can be seen from the circles indicated.
  • FIG. 7 shows the tool holder 40 of a rotary hammer in cross section. It has the rotary drivers 44, 45 adapted to the rotary driving grooves 34, 35 of the tool.
  • the locking body 49 is guided in the recess 41 of the tool holder 40 and engages in the locking groove 32 of the tool.
  • the locking body is offset by an angle ⁇ which is less than 90 ° with respect to the smaller rotary driver.
  • the tools according to the invention can be manufactured at the same time with greater fatigue strength at no additional cost on the existing production facilities, while in the tool holder even the manufacturing costs have been reduced by only one locking body and, accordingly, only one breakthrough in the tool holder for the locking body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Drilling Tools (AREA)
EP92810850A 1991-11-12 1992-11-04 Outil pour forage de frappe et porte-outil pour les outils de forage de frappe Expired - Lifetime EP0542683B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4137120A DE4137120A1 (de) 1991-11-12 1991-11-12 Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
DE4137120 1991-11-12

Publications (2)

Publication Number Publication Date
EP0542683A1 true EP0542683A1 (fr) 1993-05-19
EP0542683B1 EP0542683B1 (fr) 1995-07-19

Family

ID=6444580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810850A Expired - Lifetime EP0542683B1 (fr) 1991-11-12 1992-11-04 Outil pour forage de frappe et porte-outil pour les outils de forage de frappe

Country Status (7)

Country Link
US (1) US5286145A (fr)
EP (1) EP0542683B1 (fr)
JP (1) JP3119954B2 (fr)
KR (1) KR100201177B1 (fr)
DE (2) DE4137120A1 (fr)
DK (1) DK0542683T3 (fr)
FI (1) FI97705C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0584706A2 (fr) * 1992-08-22 1994-03-02 Robert Bosch Gmbh Outil pour outils à main

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313578A1 (de) * 1993-03-06 1994-09-08 Hilti Ag Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte
DE4313580A1 (de) * 1993-04-26 1994-10-27 Hilti Ag Werkzeugeinspannschaft
DE4403303A1 (de) * 1994-02-03 1995-08-10 Hilti Ag Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte
DE10058587A1 (de) * 2000-11-25 2002-05-29 Hilti Ag Vorrichtung zur Drehmomentübertragung
DE10241054A1 (de) * 2002-09-05 2004-03-18 Robert Bosch Gmbh Werkzeug und Werkzeughalter für eine Handwerkzeugmaschine
GB2395158B (en) * 2002-11-14 2005-11-16 Black & Decker Inc Tool holder for a rotary hammer
US20040127150A1 (en) * 2002-12-30 2004-07-01 Jih-Ming Chen Slip proof device in combination with a bit for a hand drill chuck
EP1535704B1 (fr) * 2003-11-26 2010-03-10 HILTI Aktiengesellschaft Porte-outil pour un outil rotatif à percussion
KR100809474B1 (ko) 2006-12-29 2008-03-03 위니아만도 주식회사 디스크 어셈블리
US9180528B2 (en) * 2011-09-30 2015-11-10 The United States Of America As Represented By The Secretary Of The Navy Extraction device and method
USD800906S1 (en) 2015-03-25 2017-10-24 Medtronic Ps Medical, Inc. Surgical tool
US10080579B2 (en) 2015-03-25 2018-09-25 Medtronic Ps Medical, Inc. Pin drive rotary surgical cutting tools and powered handpieces
USD800907S1 (en) 2015-03-25 2017-10-24 Medtronic Ps Medical, Inc. Surgical tool
USD782042S1 (en) 2015-03-25 2017-03-21 Medtronic Ps Medical, Inc. Surgical tool
US10314610B2 (en) 2015-03-25 2019-06-11 Medtronic Ps Medical, Inc. Slanted drive axis rotary surgical cutting tools and powered handpieces
USD790699S1 (en) 2015-03-25 2017-06-27 Medtronic Ps Medical, Inc. Surgical tool
USD800903S1 (en) 2016-02-09 2017-10-24 Medtronic Ps Medical, Inc. Surgical tool
US10849634B2 (en) 2018-06-20 2020-12-01 Medtronic Xomed, Inc. Coupling portion for rotary surgical cutting systems

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2331410A1 (fr) * 1975-11-14 1977-06-10 Bosch Gmbh Robert Dispositif pour la transmission de couples de rotation
WO1988009245A1 (fr) * 1987-05-20 1988-12-01 Robert Bosch Gmbh Dispositif de transmission de couple pour outillage electrique a main
EP0433876A1 (fr) * 1989-12-16 1991-06-26 HILTI Aktiengesellschaft Outil pour le forage à percussion et porte-outil pour outil de forage à percussion

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8425400D0 (en) * 1984-10-08 1984-11-14 Dom Holdings Plc Tool
DE3539912A1 (de) * 1985-11-11 1987-05-14 Hilti Ag Werkzeughalter fuer bohr- und meisselwerkzeuge
DE3824894A1 (de) * 1988-07-22 1990-01-25 Bosch Gmbh Robert Einrichtung an handwerkzeugmaschinen zur drehmomentuebertragung
FR2635039B1 (fr) * 1988-08-05 1990-11-02 Prospection & Inventions Foret comprenant une queue avec des rainures
DE4105414A1 (de) * 1991-02-21 1992-08-27 Hilti Ag Werkzeug und werkzeughalter fuer handwerkzeuggeraete

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2331410A1 (fr) * 1975-11-14 1977-06-10 Bosch Gmbh Robert Dispositif pour la transmission de couples de rotation
WO1988009245A1 (fr) * 1987-05-20 1988-12-01 Robert Bosch Gmbh Dispositif de transmission de couple pour outillage electrique a main
EP0433876A1 (fr) * 1989-12-16 1991-06-26 HILTI Aktiengesellschaft Outil pour le forage à percussion et porte-outil pour outil de forage à percussion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0584706A2 (fr) * 1992-08-22 1994-03-02 Robert Bosch Gmbh Outil pour outils à main
EP0584706A3 (en) * 1992-08-22 1994-08-10 Bosch Gmbh Robert Tool for portable handtools

Also Published As

Publication number Publication date
JPH05277820A (ja) 1993-10-26
FI97705B (fi) 1996-10-31
DK0542683T3 (da) 1995-11-27
DE4137120A1 (de) 1993-05-13
FI97705C (fi) 1997-02-10
JP3119954B2 (ja) 2000-12-25
FI925110A0 (fi) 1992-11-11
KR100201177B1 (ko) 1999-06-15
US5286145A (en) 1994-02-15
EP0542683B1 (fr) 1995-07-19
FI925110A (fi) 1993-05-13
DE59202948D1 (de) 1995-08-24
KR930009716A (ko) 1993-06-21

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