EP0141903B1 - Perceuse à percussion - Google Patents

Perceuse à percussion Download PDF

Info

Publication number
EP0141903B1
EP0141903B1 EP84107973A EP84107973A EP0141903B1 EP 0141903 B1 EP0141903 B1 EP 0141903B1 EP 84107973 A EP84107973 A EP 84107973A EP 84107973 A EP84107973 A EP 84107973A EP 0141903 B1 EP0141903 B1 EP 0141903B1
Authority
EP
European Patent Office
Prior art keywords
tool
clamping
shank
guide
hammer drill
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
Application number
EP84107973A
Other languages
German (de)
English (en)
Other versions
EP0141903A1 (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 percussion mechanism and a guide tube for an anvil acting on the end of a tool shaft 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 has at least three threads has displaceable clamping jaws on a clamping cone, at least with clamping surfaces for the tool shank formed by a connecting rounding of two further surfaces running at an angle to one another and a rotary drive for the guide tube at least for percussion drilling.
  • the drill chuck is arranged firmly 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, proper clamping and good concentricity are no longer guaranteed.
  • a drill chuck is known with which rotary drills with a cylindrical shank and hammer drills with a special shank with a profile cross section can be clamped.
  • 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 moved in the axial direction, but can be interchangeably secured against rotation, but only tools can be used can be clamped with a certain shaft diameter.
  • a tool holder according to DE-OS-16 52 684 and 25 51 125 is known, in which tools with a specially designed shank can be moved in the axial direction, but can be interchangeably secured against rotation, but only tools can be used can be clamped with a certain shaft diameter.
  • shaft ends of tools such as drills, reamers and thread cutters are known which are provided with surfaces or with grooves for better transmission of the working torque. Due to the shape of the shaft, the torque does not have to be transmitted by pure frictional force, but by positive locking. The profiled shaft end is firmly clamped for torque transmission. An axial movement of the tool shank on the chuck is not provided and is to be prevented, so that an impact drilling operation using a striker acting on the tool shank is not possible.
  • the object of the present invention is to improve a rotary hammer of the type mentioned in such a way that rotary bores with cylindrical shanks can be securely and firmly clamped for pure drilling, as well as hammer drills with profile shafts which are longitudinally displaceable for percussion drilling but secured against rotation by the Drill chucks are held.
  • the invention provides that the jaws of the drill chuck have axially extending guide surfaces in addition to the clamping surfaces for the radial clamping of the cylindrical tool shank, and that the further surfaces run parallel and offset to the surfaces of the additional guide surfaces.
  • the other surfaces, with their connecting roundings forming the clamping surfaces, can be easily manufactured so that they are set back in parallel with the surfaces of the additional guide surfaces.
  • 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 then centered over the guide grooves and axially displaceable but non-rotatably guided.
  • the angle between the surfaces can be approximately 90 °, which is particularly advantageous and for the transmission of high torques and nevertheless reliable longitudinal guidance, the guide grooves of the tool shank then being corresponding triangular grooves.
  • 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 displaceably guided 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, one end of the longitudinal groove then releasing the stop can.
  • 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 is fixedly connected to the guide cylinder 2 and led out of the housing 5, in which a striker 7 is displaceably guided and which can be acted upon in the axial direction by the striking mechanism 3.
  • 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 are approximately triangular in cross-section and thus form a guide surface 17 over surfaces 16 running at an angle of approximately 90 ° to one another, 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 do not rest on the bottom of the groove 18 in hammer drills and are therefore not subject to wear during percussion drilling operation. 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 adaptation, 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 hammer drilling the shank 13 'of the tool 14 in Axial direction in the sleeve 23 is movable so that the blows of the striker 7 can not act on the drill 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 arranged in a transverse bore 29 of the adapter sleeve 23 and secured against falling out by caulking the ends of the transverse bore.
  • 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 which is 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 pull-out is at its 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 suitably received in the bore 11 of the chuck body 10, is clamped 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 embossed symmetrically on each side in the wall of the adapter sleeve 23, which cam forms the counter-stop 28 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)

Claims (13)

  1. Perceuse à percussion comportant un cylindre de guidage (2) pour une pièce de percussion (3) et un tube de guidage (6) pour une bouterolle (7) agissant sur la queue (13') d'un outil du genre outil de perçage (14) à monter, sur laquelle un porte foret (9) est tenu par l'extrémité du tube de guidage (6) saillante hors du corps (5), qui présente au moins trois mors de serrage (15) mobiles le long d'un cône de serrage (19) par l'intermédiaire d'un filetage (20), au moins des surfaces de serrage (21) de la queue d'outil (13) formées par un congé de raccordement de deux surfaces extrêmes (22) concourantes, et un mécanisme d'entraînement (4) du tube de guidage (6), pour du perçage à percussion, caractérisée en ce que les mors de serrage (15) du porte foret (9), outre les surfaces de serrage (21) pour le serrage radial de la queue cylindrique d'outil (13, 13'), comportent des surfaces additionnelles de guidage (17), et en ce que les surfaces (22) extrêmes sont parallèles aux faces (16) des surfaces additionnelles de guidage (17), et decalées.
  2. 2. Perceuse à percussion selon la revendication 1 caractérisée en ce que les surfaces extrêmes (22), avec leur congé de raccordement qui forment la surface de serrage (21), sont en retrait et parallèles par rapport aux faces (16) des surfaces additionnelles de guidage (17).
  3. 3. Perceuse à percussion selon la revendication 1 ou la revendication 2 caractérisée en ce que les surfaces de guidage (17) sont formées par deux faces concourantes (16).
  4. 4. Perceuse à percussion selon la revendication 3 caractérisée en ce que l'angle entre les faces (16) est d'environ 90°.
  5. 5. Perceuse à percussion selon l'une quelconque des revendications 1 à 4 dont le corps porte foret (10) comporte un alésage (11), caractérisée en ce que l'extrémité de l'alésage (11) est équipée d'un profil d'entraînement (nervure 30).
  6. 6. Outil pour perceuse à percussion, en particulier selon l'une ou plusieurs des revendications 1 à 5, caractérisé en ce que la queue d'outil (13') présente un profil en coupe transversale sur lequel est agencée une douille l'adaptation (23) mobile axialement, possédant un profil intérieur correspondant et une surface cylindrique extérieure, en ce que la surface cylindrique extérieure est fermement maintenue par les surfaces de serrage (21) des mors de serrage (15), et en ce que le profil en coupe transversale d'au moins les rainures de guidage (18) s'adapte aux faces de guidage (17) saillantes vers l'intérieur de la douille d'adaptation (23).
  7. 7. Outil selon la revendication 6, caractérisé en ce que la douille d'adaptation (23) est mobile entre deux butées (24) de la queue d'outil (13').
  8. 8. Outil selon la revendication 7 caractérisé en ce que au moins l'une des butées (24) est un anneau de serrage monté dans une rainure circulaire (25).
  9. 9. Outil selon la revendication 7 caractérisé en ce que les butées (24) sont constituées par les rainures de guidage (18) qui ne s'étendent pas jusqu'à l'extrémité de la queue d'outil.
  10. 10. Outil selon la revendication 7 caractérisé en ce qu'une bille (28) est prévue dans un perçage transversal (31) de la douille d'adaptation (23) pour former au moins une butée (28), cette bille se logeant dans une cannelure longitudinale (26) d'une queue d'outil (13') et étant maintenue en prise par la paroi de l'alésage (11) d'un corps lisse de porte foret, une extrémité de la cannelure longitudinale (26) correspondant à la butée (24).
  11. 11. Outil selon la revendication 10 caractérisé en ce qu'en plus d'au moins une cannelure longitudinale (26) il comporte des rainures de guidage (18) s'étendant jusqu'à l'extremité de la queue d'outil et, dans la douille d'adaptation (23), en coupe transversale, des nervures (30) adaptées saillantes vers l'intérieur.
  12. 12. Outil selon la revendication 10 caractérisé en ce qu'au lieu du perçage transversal (31) et de la bille (27), des empreintes (29) sur la paroi de la douille forment des butées (28).
  13. 13. Outil pour une perceuse à percussion selon la revendication 5 caractérisé en ce que la queue d'outil (13') est guidée coulissante dans une douille d'adaptation (23) maintenue par les mors (15) et en ce qu'en outre la queue d'outil (13) présente, au moins sur sa partie terminale, un profil de section transversale tel qu'il permet un glissement axial sans rotation de l'outil (14) par rapport à la douille d'adaptation (23).
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
DE3331866 1983-09-03
DE3331866A DE3331866A1 (de) 1983-09-03 1983-09-03 Bohrhammer

Publications (2)

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

Families Citing this family (15)

* 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
DE3443138A1 (de) * 1984-11-27 1986-06-05 Metabowerke GmbH & Co, 7440 Nürtingen Werkzeughalter
DE9013083U1 (de) * 1990-09-14 1992-01-16 Robert Bosch Gmbh, 7000 Stuttgart Mitnahmehülse
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
US6261035B1 (en) 1998-11-12 2001-07-17 Black & Decker Inc. Chuck, bit, assembly thereof and methods of mounting
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

Family Cites Families (8)

* 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
US1894515A (en) * 1931-08-25 1933-01-17 Minott P Hubbell Chuck
US2956783A (en) * 1956-10-13 1960-10-18 Sandvikens Jernverks Ab Percussion drill
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
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

Also Published As

Publication number Publication date
DE3331866A1 (de) 1985-03-21
US4690226A (en) 1987-09-01
EP0141903A1 (fr) 1985-05-22
DE3468637D1 (en) 1988-02-18
ATE31887T1 (de) 1988-01-15

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