EP0141903A1 - Perceuse à percussion - Google Patents

Perceuse à percussion Download PDF

Info

Publication number
EP0141903A1
EP0141903A1 EP84107973A EP84107973A EP0141903A1 EP 0141903 A1 EP0141903 A1 EP 0141903A1 EP 84107973 A EP84107973 A EP 84107973A EP 84107973 A EP84107973 A EP 84107973A EP 0141903 A1 EP0141903 A1 EP 0141903A1
Authority
EP
European Patent Office
Prior art keywords
tool
clamping
shaft
guide
shank
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
EP84107973A
Other languages
German (de)
English (en)
Other versions
EP0141903B1 (fr
Inventor
Albrecht Schnizler
Manfred Dipl.-Ing. Schulz
Klaus Bartmann
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Priority to AT84107973T priority Critical patent/ATE31887T1/de
Publication of EP0141903A1 publication Critical patent/EP0141903A1/fr
Application granted granted Critical
Publication of EP0141903B1 publication Critical patent/EP0141903B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E21B1/12—Percussion drilling with a reciprocating impulse member
    • E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
    • E21B1/30—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure

Definitions

  • the invention relates to a hammer drill with a guide cylinder for a striking mechanism and a guide tube for a striker acting on the end of a tool shank of a tool designed as a rotary drill, on the end of the guide tube protruding from the housing, a drill chuck is held, which at least for the radial clamping of the tool shank has three clamping jaws which can be displaced via a thread on a clamping cone, at least with clamping surfaces for the tool shank and a rotary drive for the guide tube at least for percussion drilling.
  • the drill chuck is firmly arranged on the guide tube.
  • the drill bits used in the drill chuck must have an exact diameter in order to achieve perfect clamping, since during the percussion drilling operation the striking head hits both the tool end and the clamping jaws. Even with little wear or larger manufacturing tolerances, a perfect clamping and a good concentricity is no longer guaranteed.
  • a drill chuck is known, can be clamped with the rotary drill with a cylindrical shaft and hammer drill with a special shaft with a profile cross section.
  • the hammer drills are not fully tightened due to the axial mobility required to transmit the blows.
  • This known chuck is used by means of its special shank in the usual tool holder of a rotary hammer, which is fraught with a lot of play and therefore cannot guarantee the exact concentricity required for rotary drills.
  • a hammer drill for drilling and percussion drilling is known, in which tools with a specially designed shank can be displaced in the axial direction, but can be interchangeably secured against rotation, but only Tools with a certain shank diameter can be clamped.
  • tools with a specially designed shank can be displaced in the axial direction, but can be interchangeably secured against rotation, but only Tools with a certain shank diameter can be clamped.
  • the same also applies to a tool holder according to the DE-OS 16 52 684 and 25 51 125.
  • the object of the present invention is to improve a rotary hammer of the type mentioned in such a way that rotary bores with a cylindrical shaft can be securely and firmly clamped for pure drilling, as well as hammer drills with a profile shaft that can be moved longitudinally for percussion drilling, but secured against rotation by the drill chuck are held.
  • the invention provides that the clamping jaws, in addition to the clamping surfaces for the radial clamping of a cylindrical tool shank, have direct or indirect additional axially extending guide surfaces for only axially rotationally secured holding and guiding the shank of a tool, this shank with corresponding axially parallel directly or indirectly has the guide grooves assigned to the jaws.
  • the clamping surfaces of the clamping jaws can be set off particularly advantageously in such a way that they are not on the shank of the tool having guide grooves apply and that the radial, an axial displacement but no relative rotation allows clamping and guiding of the shaft through the mutually adapted surfaces of the jaws and the guide grooves.
  • the guide surfaces can each be formed by two surfaces running at an angle to one another, through which the shank of the tool is centered over its guide grooves and guided axially displaceably, but secured against rotation.
  • the angle between the surfaces can be approximately 90 °, the guide grooves of the tool shank then being corresponding triangular grooves.
  • the clamping surface of a clamping jaw can be formed by a connection rounding of two further surfaces running at an angle to one another.
  • the further surfaces are advantageously arranged parallel to the surfaces of the additional guide surfaces and offset with respect to them.
  • the recessed arrangement protects the guide surfaces. Small deformations of the clamping surfaces when clamping a cylindrical shaft have no influence on the guide surfaces, so that a reliable longitudinal displacement of the tool is guaranteed when hammer drilling.
  • the tool shank can advantageously have a profile cross section on which an adapter sleeve with a corresponding inner cross section and cylindrical outer surface is arranged so as to be axially displaceable.
  • the adapter sleeve can then be firmly clamped in the drill chuck.
  • the blows acting in the axial direction do not act on the chuck.
  • the latter can advantageously be guided displaceably between two stops of the tool shaft, a usual displacement path of approximately 10 to 15 mm being sufficient for percussion drilling operation.
  • At least one of the stops is a clamping ring inserted in a circumferential groove, which is particularly simple in design with easy interchangeability.
  • the stops can be formed particularly advantageously by the ends of the guide grooves which do not extend to the end of the shaft.
  • a ball can be provided in a transverse bore to form counter-stops in the adapter sleeve, which ball engages in a longitudinal groove of the shaft and is held in engagement by the wall of the bore of the chuck body, in which case one end of the longitudinal groove can release the stop.
  • the ball can be secured against falling out by caulking the ends of the transverse bore.
  • At least one guide groove which extends through to the end of the shaft and is adapted in cross-section to project inwardly projecting webs in the adapter sleeve.
  • at least one cam stamped into the sleeve wall can serve as a counterstop instead of the transverse bore and the ball.
  • the tool shaft can be displaceably guided in an adapter sleeve which can be clamped between the clamping jaws, the tool shaft having a profile cross section at least at its end region and a driving profile adapted to the profile cross section of the tool shaft being provided in the chuck body at the end of the bore, which axially displacing the Tool allows, but no rotation relative to the chuck body.
  • the hammer drill 1 which is only partially shown, has a guide cylinder 2 of a striking mechanism 3, which can be rotated via a rotary drive 4.
  • a guide tube 6, in which a striker 7 is displaceably guided, is firmly connected to the guide cylinder 2 and led out of the housing 5 and which can be acted upon by the striking mechanism 3 in the axial direction.
  • the end of the guide tube 6 protruding from the housing 5 has a thread 8 on which a drill chuck 9 is screwed.
  • the drill chuck body 10 of the drill chuck 9 has an axially running bore 11, in which a sealing ring 12 is inserted in order to prevent dirt from entering, through which the shaft 13 of a tool 14 is sealed.
  • the tool 14 is held centered in the chuck 9 via three clamping jaws 15 distributed over the circumference.
  • the shaft 13 can be displaced by a certain amount in the axial direction, but rotation in the direction of rotation is impossible by the clamping jaws 15.
  • the clamping jaws have an approximately triangular cross-section and thus form surfaces 16, which extend at an angle of approximately 90 ° to one another, a guide surface 17 which are guided in corresponding guide grooves 18 of the tool 14, as can be seen in particular from FIG. 3.
  • the tool 14 is a hammer drill, which is driven in the percussion drilling operation by the striking block 7 in the axial direction with rotation via the rotary drive 4 by strikes of the striking mechanism 3, by this striking the Increase drilling capacity in a known manner.
  • the clamping jaws 15, which can be moved by a thread 20 via a clamping cone 19, are only tightened just enough that axial displacement is still possible during percussion drilling operation, but axial guidance is ensured.
  • the clamping jaws 15 In order to be able to clamp normal rotary drills with a cylindrical shaft, the clamping jaws 15 have clamping surfaces 21 which are formed by the rounded transition from two further surfaces 22 arranged at an angle to one another. These further surfaces 22 are set back from the surfaces 16, but run parallel, so that the clamping surfaces 21 are not in hammer drills rest against the bottom of the groove 18 and are therefore not subject to wear during impact drilling. Furthermore, damage to the clamping surface 16 cannot lead to damage to the groove 18 and imprecise axial guidance.
  • a sleeve 23 is arranged axially displaceably with a corresponding cross-sectional adjustment, the axial displaceability being limited by stops 24 in the form of clamping rings arranged in grooves 25.
  • the sleeve 23 is held firmly by the clamping jaws 15, while for the percussion drilling the shaft 13 'of the tool 14 can be moved in the axial direction in the sleeve 23, so that the blows of the striker 7 cannot act on the chuck 9.
  • the stroke of the striker 7 is limited so that when the stop 24 bears against the inner side of the sleeve 23, no more blows can be transmitted.
  • the guide grooves 18 are adapted to the triangular shape of the guide surfaces 17, while in the embodiment of FIGS. 4 and 5 there is a trapezoidal design of the guide surfaces 17 and guide grooves 18.
  • both rotary drill and hammer drill can be clamped as tools 14 and it is thus possible to carry out flush drilling and the usual hammer drilling with a single tool designed as a hammer drill. This simplifies tooling on construction sites.
  • the shaft 13 'of the tool 14 has two guide grooves 18 and two longitudinal grooves 26 symmetrically, these longitudinal grooves 26 not being guided all the way to the end of the shaft, so that in the end region through these longitudinal grooves 26 the stop 14 is formed for a ball 27 of a counter stop 28.
  • the ball 27 is in a transverse bore 29 Adapter sleeve 23 arranged and secured against falling out by caulking the cross bore ends.
  • the diameter of the ball 27, the adapter sleeve thickness and the depth of the longitudinal groove 26 is dimensioned such that the ball 27 is held in engagement in the longitudinal groove 26 by the bore wall in the adapter sleeve 23 inserted into the bore 11 of the drill chuck, so that the tool 14 cannot be pulled axially out of the adapter sleeve 23, but the ball 27 comes to rest against the stop 24 when the pulling is done to the maximum.
  • the axial displaceability is so great, however, that the striker 7 can cooperate with the shaft 13 'in its full functional range.
  • the adapter sleeve 23, which is accommodated in the bore 11 of the chuck body 10, is clamped tightly over the clamping jaws 15 without the axial movement of the tool 14 being hindered in the stroke area of the longitudinal grooves 26.
  • a cam 29 is stamped symmetrically on each side in the wall of the adapter sleeve 23, which cam counterstop 28 forms together with the longitudinal grooves 26.
  • the end of the longitudinal groove 26 on the chuck side again forms the stop 24, which interacts with the cam 29 and prevents the adapter sleeve 23 held between the clamping jaws 15 from falling out.
  • the sleeve 23 in this exemplary embodiment cannot be plugged onto the clamping shank of the tool, it must be divided in the middle in order to insert the cams 29 into the longitudinal grooves 26 transversely to the plane of the cams.
  • the rotationally fixed entrainment of the tool takes place by a direct positive connection 30 between the shaft end of the tool and the chuck body (FIGS. 10 and 11).

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Earth Drilling (AREA)
  • Electrophonic Musical Instruments (AREA)
EP84107973A 1983-09-03 1984-07-07 Perceuse à percussion Expired EP0141903B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84107973T ATE31887T1 (de) 1983-09-03 1984-07-07 Bohrhammer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3331866A DE3331866A1 (de) 1983-09-03 1983-09-03 Bohrhammer
DE3331866 1983-09-05

Publications (2)

Publication Number Publication Date
EP0141903A1 true EP0141903A1 (fr) 1985-05-22
EP0141903B1 EP0141903B1 (fr) 1988-01-13

Family

ID=6208189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107973A Expired EP0141903B1 (fr) 1983-09-03 1984-07-07 Perceuse à percussion

Country Status (4)

Country Link
US (1) US4690226A (fr)
EP (1) EP0141903B1 (fr)
AT (1) ATE31887T1 (fr)
DE (2) DE3331866A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3443138A1 (de) * 1984-11-27 1986-06-05 Metabowerke GmbH & Co, 7440 Nürtingen Werkzeughalter
EP0476387A1 (fr) * 1990-09-14 1992-03-25 Robert Bosch Gmbh Douille d'entraînement

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413005C2 (de) * 1984-04-06 1986-04-17 Röhm GmbH, 7927 Sontheim Werkzeugschaft mit mehreren axial verlaufenden Nuten
US5305835A (en) * 1992-09-23 1994-04-26 Ingersoll-Rand Company Nonrotary piston for jackhammer and removable splined nut therefor
US5398772A (en) * 1993-07-01 1995-03-21 Reedrill, Inc. Impact hammer
DE19645222C2 (de) * 1996-11-02 2000-11-09 Tracto Technik Vorrichtung zum horizontalen Schlagbohren
US5816584A (en) * 1997-01-02 1998-10-06 Power Tool Holders, Inc. Chuck with improved jaw bite
WO2000027574A1 (fr) 1998-11-12 2000-05-18 Black & Decker Inc. Mandrin, meche, assemblage de ces derniers et procedes de montage
US6354605B1 (en) 2000-03-10 2002-03-12 Power Tool Holders Incorporated Chuck with improved jaw
EP1535704B1 (fr) * 2003-11-26 2010-03-10 HILTI Aktiengesellschaft Porte-outil pour un outil rotatif à percussion
DE10360008B4 (de) * 2003-12-19 2006-04-06 Wacker Construction Equipment Ag Vorrichtung für einen Bohr- oder Schlaghammer mit Werkzeugaufnahme
DE102004054685A1 (de) * 2004-11-12 2006-05-18 Hilti Ag Werkzeugaufnahme
US8403339B2 (en) * 2008-06-18 2013-03-26 Jacobs Chuck Manufacturing Company Self tightening chuck with an axial lock
CN102233563B (zh) * 2010-04-30 2014-06-11 南京德朔实业有限公司 电动榔头快夹装置
EP3081340A1 (fr) * 2015-04-13 2016-10-19 HILTI Aktiengesellschaft Machine-outil portative

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1894515A (en) * 1931-08-25 1933-01-17 Minott P Hubbell Chuck
FR1330849A (fr) * 1962-05-16 1963-06-28 Perfectionnements aux outils de coupe à mouvement combiné radial et axial et outils munis de ces perfectionnements

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1511784A (en) * 1922-10-31 1924-10-14 Elek Zitatswerk Lonza Soc Plastic composition
US2956783A (en) * 1956-10-13 1960-10-18 Sandvikens Jernverks Ab Percussion drill
US3865198A (en) * 1972-12-08 1975-02-11 Vernon L Price Adapter assembly having wedge head with saddle fit latch for impact tool units
DE2335865C3 (de) * 1973-07-14 1975-12-18 Metabowerke Kg, Closs, Rauch & Schnizler, 7440 Nuertingen Futter für Schlagbohrmaschinen oder Bohrhammer
DE2618596C2 (de) * 1976-04-28 1984-05-17 Robert Bosch Gmbh, 7000 Stuttgart Werkzeughalter
DD202818A1 (de) * 1981-12-21 1983-10-05 Zella Mehlis August Bebel Werk Sicherheitseinrichtung an bohrfuttern, insbesondere fuer schlagbohrbetrieb

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1894515A (en) * 1931-08-25 1933-01-17 Minott P Hubbell Chuck
FR1330849A (fr) * 1962-05-16 1963-06-28 Perfectionnements aux outils de coupe à mouvement combiné radial et axial et outils munis de ces perfectionnements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3443138A1 (de) * 1984-11-27 1986-06-05 Metabowerke GmbH & Co, 7440 Nürtingen Werkzeughalter
EP0476387A1 (fr) * 1990-09-14 1992-03-25 Robert Bosch Gmbh Douille d'entraînement

Also Published As

Publication number Publication date
DE3468637D1 (en) 1988-02-18
EP0141903B1 (fr) 1988-01-13
ATE31887T1 (de) 1988-01-15
DE3331866A1 (de) 1985-03-21
US4690226A (en) 1987-09-01

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