EP0551795B1 - Werkzeug zum Schlagbohren und Meisseln und Werkzeugaufnahme für diese Werkzeuge - Google Patents

Werkzeug zum Schlagbohren und Meisseln und Werkzeugaufnahme für diese Werkzeuge Download PDF

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Publication number
EP0551795B1
EP0551795B1 EP92811004A EP92811004A EP0551795B1 EP 0551795 B1 EP0551795 B1 EP 0551795B1 EP 92811004 A EP92811004 A EP 92811004A EP 92811004 A EP92811004 A EP 92811004A EP 0551795 B1 EP0551795 B1 EP 0551795B1
Authority
EP
European Patent Office
Prior art keywords
tool
rotary
rotary drive
largest
smallest
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
Application number
EP92811004A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0551795A1 (de
Inventor
Werner Dipl.-Ing. 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 EP0551795A1 publication Critical patent/EP0551795A1/de
Application granted granted Critical
Publication of EP0551795B1 publication Critical patent/EP0551795B1/de
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
    • B25D17/02—Percussive tool bits
    • 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 which has a clamping shank for insertion into a tool holder of a hand-held power tool intended for chiselling and / or drilling and / or impact drilling, which is provided with at least three rotary driving grooves of different cross-section, which are used for the axial insertion of rotating drivers of the tool holder in the free end surface of the clamping shaft open, and with a locking groove which is closed for receiving a locking body of the tool holder at least at its end adjacent to the end surface of the clamping shaft to limit the axial movement of the tool.
  • Tools of this type are known, for example, from DE-PA 3941646 and the unpublished DE-PA 4141846.
  • the rotary driving grooves or surfaces are arranged in accordance with the size of their radially outward opening surfaces in the order from the largest to the smallest opening surface and the locking groove the rotary driving grooves with the largest and smallest Opening area is adjacent. It is advantageous here if the rotary driving grooves or surfaces are arranged in the direction of rotation, according to the size of their radially outward opening surfaces, in the order from the largest to the smallest opening surface. This is advantageous because the flanks of the rotary driving grooves leading in the direction of rotation are also the flanks loaded by the drilling torque.
  • a perpendicular bisector erected on the secant of the locking groove forms an angle greater than 90 ° with the perpendicular bisector erected on the secant of the largest driving surface leading it in the direction of rotation of the tool.
  • the locking groove and rotary driving grooves are arranged on the clamping shaft in such a way that the edge surfaces remaining between them are of the same size, a further reduction in the stress peaks and thus the risk of breakage is achieved.
  • This is also served by the convex design of the bottom surfaces of the rotary driving grooves, since this increases the cross-sectional area of the clamping shaft without reducing the contact area between the rotating driver flanks and the rotary driving groove flanks, which is decisive for the transmission of the torque.
  • the rotary driving grooves of the largest and smallest opening area are diametrically opposite one another and a third rotary driving groove is preferably arranged at an angle of 90 ° to them.
  • the in the FIG. 1 and 2 shown clamping shaft 11 has a locking groove 12 and three rotary driving grooves 13, 14, 15.
  • the direction of rotation during drilling is shown in FIG. 2 indicated by an arrow.
  • the rotary driving grooves 13, 14, 15 are arranged in the direction of rotation according to the size of their radial opening area from the locking groove 12 so that this opening area becomes smaller.
  • the locking groove 12 is located between the largest rotary driving groove 13 and the smallest rotating driving groove 15.
  • the edge surfaces 17, 18, 19, 20 of the clamping shaft 11 between the grooves 12, 13, 14, 15 are approximately the same size. As shown in FIG.
  • the rotary driving grooves 13, 14, 15 open into the free end surface 16 of the clamping shaft, so that the tool shaft can be inserted axially into a tool holder which has strip-shaped rotary drivers adapted to the grooves 13, 14, 15. It is obvious that despite the very differently sized rotary driving grooves, which are due to the fact that the tool should only be inserted into the tool holder in one position, the arrangement of the rotating driving grooves and the locking groove described above result in a favorable distribution of the loads which occur due to the uniform distribution the cross-sectional area is achieved.
  • the in the FIG. 3 and 4 shown clamping shaft has the three rotational driving grooves 23, 24, 25 arranged at right angles to each other.
  • the locking groove 22 is arranged to the largest rotary driving groove 23 at an angle ⁇ greater than 90 °. With the smallest rotary driving groove 25, the locking groove 22 forms an angle ⁇ of less than 90 °. This results in a better division of the cross-sectional area.
  • the two locking bodies 27 and 28 of the best-selling heavy rotary hammer are indicated by dashed lines and shown that the tool according to the invention can also be used in this rotary hammer machine in that the cross-sectional shape 30 of the locking groove 22 and the cross-sectional shape 31 of the rotary driving groove 24 are designed accordingly. Due to the right-angled arrangement of the rotary driving grooves, the one shown in FIG. 4 clamping shank shown is particularly good for mechanical production. The bottom surface 29 of the locking groove 23 is convexly curved and thereby increases the cross-sectional area.
  • FIG. 5 and 6 illustrated embodiment differs from the embodiment in FIG. 3 and 4 in that the rotary driving groove 35 has a larger radial opening area and is asymmetrical.
  • the rectangular coordinate axes in FIG. 6 divide the opening areas of the rotary driving grooves into sections, the sections 37, 38, 39 which advance in the direction of rotation relative to the coordinate axes becoming smaller as seen from the locking groove.
  • FIG. 7 shows the tool holder 40 of a rotary hammer in cross section. It has the rotary drivers 43, 44, 45 adapted to the rotary driving grooves 23, 24, 25 of the tool.
  • the locking body 49 is guided in the recess 41 of the tool holder 40 and engages in the locking groove 22 of the tool.
  • the locking body is offset by an angle ⁇ , which is greater than 90 °, with respect to the larger rotary driver 43 and an angle ⁇ , which is less than 90 °, with respect to the smallest rotary driver 45.
  • the foot cross sections 46, 47, 48 of the rotary drivers 43, 44, 45 are smaller as seen from the locking body 49.
  • the tools and tool holders according to the invention reduce wear and tear in a surprisingly simple manner Fatigue problems. There are no additional costs compared to the tools of the generic term. It can be produced on existing manufacturing facilities.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Drilling Tools (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP92811004A 1992-01-13 1992-12-15 Werkzeug zum Schlagbohren und Meisseln und Werkzeugaufnahme für diese Werkzeuge Expired - Lifetime EP0551795B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4200643 1992-01-13
DE4200643A DE4200643A1 (de) 1992-01-13 1992-01-13 Werkzeug zum schlagbohren und meisseln und werkzeugaufnahme fuer diese werkzeuge

Publications (2)

Publication Number Publication Date
EP0551795A1 EP0551795A1 (de) 1993-07-21
EP0551795B1 true EP0551795B1 (de) 1995-03-01

Family

ID=6449431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92811004A Expired - Lifetime EP0551795B1 (de) 1992-01-13 1992-12-15 Werkzeug zum Schlagbohren und Meisseln und Werkzeugaufnahme für diese Werkzeuge

Country Status (7)

Country Link
US (1) US5320459A (fi)
EP (1) EP0551795B1 (fi)
JP (1) JPH05305576A (fi)
KR (1) KR100273081B1 (fi)
DE (2) DE4200643A1 (fi)
DK (1) DK0551795T3 (fi)
FI (1) FI102817B (fi)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4227949A1 (de) * 1992-08-22 1994-02-24 Bosch Gmbh Robert Werkzeug für Handwerkzeugmaschinen
DE4313580A1 (de) * 1993-04-26 1994-10-27 Hilti Ag Werkzeugeinspannschaft
DE4338818A1 (de) * 1993-11-13 1995-05-18 Hawera Probst Kg Hartmetall Einrichtung an Handwerkzeugmaschinen zur Drehmomentübertragung
DE4340728C1 (de) * 1993-11-30 1995-01-26 Bosch Gmbh Robert Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen
DE4341970A1 (de) * 1993-12-09 1995-06-14 Hilti Ag Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte
DE4400969A1 (de) * 1994-01-14 1995-07-20 Bosch Gmbh Robert Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen
US6089798A (en) * 1994-01-14 2000-07-18 Robert Bosch Gmbh Device for coupling a tool to a hand-held tool-driving device
DE4403303A1 (de) * 1994-02-03 1995-08-10 Hilti Ag Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte
DE19507567A1 (de) * 1995-03-03 1996-09-05 Drebo Werkzeugfab Gmbh Bohrer
DE19537561A1 (de) * 1995-10-09 1997-04-10 Hilti Ag Werkzeughalter
DE19734140A1 (de) * 1997-08-07 1999-02-11 Hawera Probst Gmbh Bohrwerkzeug
DE20204416U1 (de) * 2002-03-19 2002-07-11 Gebrüder Heller Dinklage GmbH, 49413 Dinklage Werkzeug für eine Handwerkzeugmaschine
ATE460255T1 (de) * 2003-11-26 2010-03-15 Hilti Ag Werkzeugaufnahme für ein drehendes und schlagendes werkzeug
DE102004026850A1 (de) * 2004-06-02 2005-12-29 Hilti Ag Einsteckende für ein drehendes und/oder schlagendes Werkzeug
KR101795138B1 (ko) 2015-07-03 2017-11-08 경북대학교 산학협력단 부산물 사료 발효 저장 시스템

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716915A1 (de) * 1987-05-20 1988-12-08 Bosch Gmbh Robert Einrichtung an handwerkzeugmaschinen zur drehmomentuebertragung
DE3824894A1 (de) * 1988-07-22 1990-01-25 Bosch Gmbh Robert Einrichtung an handwerkzeugmaschinen zur drehmomentuebertragung
DE3941646A1 (de) * 1989-12-16 1991-06-20 Heller Werkzeug Gmbh Geb Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
DE9013190U1 (de) * 1990-09-17 1992-01-23 Drebo Werkzeugfabrik GmbH, 7963 Altshausen Bohrer
DE4032739A1 (de) * 1990-10-16 1992-04-23 Bosch Gmbh Robert Werkzeug

Also Published As

Publication number Publication date
FI930104A (fi) 1993-07-14
DE59201545D1 (de) 1995-04-06
FI102817B1 (fi) 1999-02-26
US5320459A (en) 1994-06-14
FI102817B (fi) 1999-02-26
KR930016201A (ko) 1993-08-26
FI930104A0 (fi) 1993-01-12
DE4200643A1 (de) 1993-07-15
KR100273081B1 (ko) 2000-12-01
DK0551795T3 (da) 1995-07-24
EP0551795A1 (de) 1993-07-21
JPH05305576A (ja) 1993-11-19

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