EP0474591B1 - Tige encastrée avec prise centrale d'un foret - Google Patents

Tige encastrée avec prise centrale d'un foret Download PDF

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Publication number
EP0474591B1
EP0474591B1 EP91810638A EP91810638A EP0474591B1 EP 0474591 B1 EP0474591 B1 EP 0474591B1 EP 91810638 A EP91810638 A EP 91810638A EP 91810638 A EP91810638 A EP 91810638A EP 0474591 B1 EP0474591 B1 EP 0474591B1
Authority
EP
European Patent Office
Prior art keywords
central opening
tool
cutout
drill
opening
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
EP91810638A
Other languages
German (de)
English (en)
Other versions
EP0474591A3 (en
EP0474591A2 (fr
Inventor
Werner Bogner
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 EP0474591A2 publication Critical patent/EP0474591A2/fr
Publication of EP0474591A3 publication Critical patent/EP0474591A3/de
Application granted granted Critical
Publication of EP0474591B1 publication Critical patent/EP0474591B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • 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
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
    • 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
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0042—Ball-shaped locking members
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S279/00—Chucks or sockets
    • Y10S279/904—Quick change socket
    • Y10S279/905—Quick change socket with ball detent
    • 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
    • Y10T279/17128—Self-grasping
    • Y10T279/17136—Yielding grasping jaws
    • Y10T279/17145—Ball or roller
    • 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
    • Y10T279/17761—Side detent
    • Y10T279/17786—Spring
    • 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
    • Y10T408/895—Having axial, core-receiving central portion
    • Y10T408/8957—Having axial, core-receiving central portion and having stepped cutting edges
    • 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 with an insertion shaft for tool holders of drilling and chiseling devices, wherein the insertion shaft has a central opening that is open in the drilling direction and has at least one opening that is open toward the central opening, wherein an essentially radially and limitedly displaceable locking element is mounted in at least one opening whose radial extent exceeds the wall thickness of the insertion shaft through the opening area.
  • a tool of the aforementioned type is known from DE-A 3029101, which is provided with an insertion shaft for tool holders of drilling and chiseling devices.
  • the insertion shaft has a central opening which is open in the drilling direction and into which an opening opens, an essentially radially displaceable locking element being mounted in the opening.
  • This locking element is designed as an adjusting screw, the threaded area of this adjusting screw exceeding the radial extent of the wall thickness of the insertion shaft in the opening area.
  • the tool is automatically centered without play when supported by the conical receiving opening when inserted from the wall of the receiving opening.
  • the tools are rotated by means of driver strips on the tool holder, which engage in grooves on the tool side.
  • the tools are held axially by means of essentially radially displaceable pins which are arranged tangentially to the receiving opening and which engage in corresponding recesses, in particular in an annular groove of the tool.
  • Corresponding openings in the walls have to be made mainly for electrical or sanitary installations in buildings. This can be done through holes e.g. for pipes or corresponding recesses in walls in which e.g. Flush-mounted boxes for switches or sockets can be attached.
  • Such works are essentially openings that have a larger diameter.
  • larger drilling rigs are used for such work.
  • These devices are attached to the component using a base plate, vacuum or anchor fixings. The actual device is fastened to the base plate with the drill bit.
  • the difficulty with the use of a hand-held drill is the running of the drill bit when it is placed on a component. Precise positioning with such a drill bit cannot be achieved.
  • the prior art known from DE-A-30 29 101 relates to a hollow core bit with a center drill, the core bit having diamond grinding segments on the end face.
  • the center drill is clamped in a rear extension of the carrier body within a hole by means of a clamping screw.
  • the spiral part of the center drill extends at least over the entire length of the drill body of the hollow drill bit.
  • the center drill always remains clamped in the tool during the entire drilling process.
  • the disadvantage is that abrupt torques of different sizes can act on the center drill.
  • a screw pressing radially on the smooth, cylindrical shaft of the center drill With a screw pressing radially on the smooth, cylindrical shaft of the center drill, a secure, non-slip clamping of the center drill in the carrier body cannot be guaranteed. If the drill slides, no further immersion can take place in the component to be machined.
  • the invention has for its object to provide a way to quickly and easily attach and remove a drill used to center the tool in the shank area of the tool in order to achieve a precise placement of a hand-held drill bit.
  • the object is achieved in that an annular groove is provided on the insertion shaft for engaging tangentially extending cylindrical locking elements of the tool holder, the opening being open towards the ring groove and the opening of the opening towards the central opening having a smaller cross section than the radial projection of the Locking element that a spring element is provided in the area of the annular groove to prevent the locking element from falling out, and that the insertion shaft for driving the rotation has at least one driver strip in the central opening and grooves distributed externally over the circumference.
  • the opening of the opening has a smaller cross section towards the central opening than the radial projection of the locking element.
  • the opening can be largely cylindrical over its entire length, having a conical narrowing.
  • the narrowing of the opening has the task of preventing the locking element from falling out of the opening into the central opening.
  • the locking element can have different shapes.
  • the cross section of the locking element can be polygonal or rounded.
  • a locking element in the form of a ball is preferably used.
  • a spring element is provided, which serves to prevent the locking element from falling out in the opposite direction to the central opening.
  • This element can e.g. consist of metal, plastic or rubber and can be designed as a compression or leaf spring.
  • a spring element is used, which is designed as an elastic ring.
  • This elastic ring can be made of metal, plastic or rubber.
  • the cross section can have different shapes, e.g. round or polygonal.
  • one or more driver strips are arranged for rotary driving.
  • the flanks of the driver strips are designed radially and protrude into the central recess.
  • a further advantageous embodiment of the invention is that the locking elements are held in the position protruding into the central opening by the locking elements which are inserted into the annular groove.
  • the tool can be designed, for example, in two parts, a hollow cylinder being connected to the insert shaft by means of a releasable connection, in particular a thread.
  • a releasable connection in particular a thread.
  • the hollow cylinder can have the external thread and the drill bit the matching internal thread.
  • Another embodiment is the arrangement of the external thread on the hollow cylinder and an adapter with the appropriate internal thread.
  • the tool can be put together appropriately.
  • FIG. 1 shows a tool 1 with a drill bit 15 having diamond grains.
  • An insertion shaft 2 is connected at the end to a hollow cylinder (14) provided with thread 10.
  • the insertion shank 2 essentially has a conical contour corresponding to the receiving opening of a suitable tool holder, known per se and therefore not shown, with a control angle A, which is preferably designed at 25 °.
  • a cylindrical, free end section 12 of the insertion shaft 2 corresponds in diameter E to a bore section, likewise not shown, in the receiving sleeve of a tool holder.
  • an annular groove 3 is provided in the region of the tapered contour of the insertion shaft 2, the bottom of which is formed by a flank B on the insertion side and a flank C opposite this.
  • the flank B is inclined at an angle D of 30 ° to the tool axis, while the opposite flank C is essentially perpendicular to the tool axis.
  • the insertion shaft 2 has a central opening 4 which is open in the drilling direction and has an opening 5 which is open from the annular groove 3 to the central opening 4.
  • an essentially radially displaceable locking element 6 is mounted, the radial extent of which exceeds the wall thickness F in the opening area.
  • two driver strips 9 are arranged in the central opening 4. It is thus possible to fasten a center drill 13 with a corresponding shaft centrally within a drill bit.
  • the grooves located on the shaft which are open to the rear, align with the driver strips 9, after which the latter can be inserted.
  • the locking element 6 arranged in the area of the annular groove 3 engages through the opening 5 running towards the central opening 4 into engagement with the recess 16, which is further arranged on the shaft of the center drill 13 and is closed on both sides.
  • This recess 16 serves only for the axial locking the center drill 13 in the shank 2.
  • the opening 5 has a cross-sectional constriction at the mouth 7 towards the central opening 4, which prevents the locking element 6 from falling out.
  • a spring element 8 is provided which is designed as an elastic ring. This can be made of metal, plastic or rubber.
  • the cross section can have different shapes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
  • Soil Working Implements (AREA)
  • Surgical Instruments (AREA)
  • Gripping On Spindles (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)

Claims (4)

  1. Outil avec manchon de montage (2) pour porte-outil d'appareils de perçage et de burinage, le manchon de montage (2) comportant une ouverture centrale (4) qui est ouverte dans la direction de perçage et qui comprend au moins une découpe (5) ouverte en direction de l'ouverture centrale (4), dans lequel dans au moins une découpe (5) est logé un élément de verrouillage (6) qui peut se déplacer sensiblement radialement ainsi que de manière limitée et dont l'extension radiale est supérieure à l'épaisseur de paroi (F) du manchon de montage (2) dans la zone de la découpe, caractérisé en ce qu'une rainure annulaire (3) est ménagée dans le manchon de montage (2) pour recevoir des éléments d'arrêt cylindriques orientés tangentiellement du porte-outil, la découpe (5) étant ouverte en direction de la rainure annulaire (3), et l'orifice débouchant (7) de la découpe (5) dans l'ouverture centrale (4) possédant une section inférieure à la projection radiale de l'élément de verrouillage (6), en ce qu'un élément élastique (8) est prévu dans la zone de la rainure annulaire (3) pour empêcher l'élément de verrouillage (6) de s'échapper, et en ce que, pour l'entraînement en rotation, le manchon de montage (2) comporte, dans l'ouverture centrale (4), au moins une nervure d'entraînement (9) ainsi que des rainures extérieures (11) réparties sur la périphérie.
  2. Outil selon la revendication 1, caractérisé en ce que l'élément élastique (8) est conçu sous la forme d'un anneau élastique.
  3. Outil selon la revendication 1 ou 2, caractérisé en ce que l'élément de verrouillage (6) est de forme sphérique.
  4. Outil selon l'une des revendications 1 à 3, caractérisé en ce que l'élément de verrouillage (6) est maintenu dans la position en saillie dans l'ouverture centrale (4) par les éléments d'arrêt du porte-outil logés dans la rainure annulaire (3).
EP91810638A 1990-09-01 1991-08-13 Tige encastrée avec prise centrale d'un foret Expired - Lifetime EP0474591B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4027820A DE4027820A1 (de) 1990-09-01 1990-09-01 Einsteckschaft mit zentraler bohreraufnahme
DE4027820 1990-09-01

Publications (3)

Publication Number Publication Date
EP0474591A2 EP0474591A2 (fr) 1992-03-11
EP0474591A3 EP0474591A3 (en) 1993-02-10
EP0474591B1 true EP0474591B1 (fr) 1995-12-27

Family

ID=6413448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810638A Expired - Lifetime EP0474591B1 (fr) 1990-09-01 1991-08-13 Tige encastrée avec prise centrale d'un foret

Country Status (8)

Country Link
US (1) US5174696A (fr)
EP (1) EP0474591B1 (fr)
JP (1) JPH06198637A (fr)
KR (1) KR920006084A (fr)
AT (1) ATE132066T1 (fr)
DE (2) DE4027820A1 (fr)
DK (1) DK0474591T3 (fr)
ES (1) ES2080935T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4223518A1 (de) * 1992-07-17 1994-01-20 Hilti Ag Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte
EP0732164B1 (fr) * 1995-03-17 1999-08-25 Hawera Probst GmbH Outil de perçage, en particulier pour le perçage par percussion de la pierre
US5951026A (en) * 1997-12-12 1999-09-14 Black & Decker Inc. Removable chuck
US6079716A (en) * 1997-12-12 2000-06-27 Black & Decker Inc. Removable chuck
US6000888A (en) * 1999-02-12 1999-12-14 Snap-On Tools Company Quick coupler mechanism for power tool bits
ES2294398T3 (es) * 2000-09-01 2008-04-01 Credo Technology Corporation Disposicion de mandril de cambio rapido, para sierra de perforacion y broca de perforacion.
DE10101451B4 (de) * 2001-01-15 2010-04-01 Robert Bosch Gmbh Schneidewerkzeug
JP4363019B2 (ja) * 2002-09-20 2009-11-11 マックス株式会社 コアビット
DE10324426A1 (de) * 2003-05-30 2004-12-16 Robert Bosch Gmbh Handwerkzeugmaschine
DE102005015100A1 (de) * 2005-04-01 2006-10-05 Robert Bosch Gmbh Einsatzwerkzeug und Werkzeughalter für eine Handwerkzeugmaschine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1858276A (en) * 1930-04-18 1932-05-17 Millers Falls Co Hand tool
US1862337A (en) * 1931-01-28 1932-06-07 George W Emrick Tap, drill, and similar tool
DE891043C (de) * 1951-10-23 1953-09-24 Rehbein Geb Zentrierbohrer fuer Anbohrfraeser
US3243924A (en) * 1964-01-06 1966-04-05 Wheel Trueing Tool Co Diamond drill bit
US3398965A (en) * 1966-05-26 1968-08-27 Balas Collet Company Quick change tool holder
FR2193681A1 (fr) * 1972-07-25 1974-02-22 Bosch Gmbh Robert
DE2621898A1 (de) * 1976-05-17 1977-12-01 Rolf Krage Spannvorrichtung fuer praezisionswerkzeuge mit konstantem schaftdurchmesser
DE3205063C2 (de) * 1981-04-03 1986-10-09 Robert Bosch Gmbh, 7000 Stuttgart Werkzeughalter
JPS6047044B2 (ja) * 1981-07-14 1985-10-19 萬デザイン株式会社 電磁式ドリルスタンドの芯出し装置
DE3220794C2 (de) * 1982-06-03 1986-10-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Hülsenförmige Werkzeugaufnahme für Bohrhämmer
DE3434076A1 (de) * 1984-09-17 1986-04-17 Hilti Ag, Schaan Werkzeughalter fuer bohr- und meisselwerkzeuge
US4900202A (en) * 1988-09-08 1990-02-13 Wienhold James L Chuck assembly for tool bits

Also Published As

Publication number Publication date
EP0474591A3 (en) 1993-02-10
EP0474591A2 (fr) 1992-03-11
DK0474591T3 (da) 1996-04-09
KR920006084A (ko) 1992-04-27
ES2080935T3 (es) 1996-02-16
DE4027820A1 (de) 1992-03-05
ATE132066T1 (de) 1996-01-15
DE59107142D1 (de) 1996-02-08
JPH06198637A (ja) 1994-07-19
US5174696A (en) 1992-12-29

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