EP0605602B1 - Dispositif monte sur des outils a main mecaniques - Google Patents

Dispositif monte sur des outils a main mecaniques Download PDF

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Publication number
EP0605602B1
EP0605602B1 EP92920854A EP92920854A EP0605602B1 EP 0605602 B1 EP0605602 B1 EP 0605602B1 EP 92920854 A EP92920854 A EP 92920854A EP 92920854 A EP92920854 A EP 92920854A EP 0605602 B1 EP0605602 B1 EP 0605602B1
Authority
EP
European Patent Office
Prior art keywords
tool
shank
grooves
tool holder
locking bodies
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
EP92920854A
Other languages
German (de)
English (en)
Other versions
EP0605602A1 (fr
Inventor
Alfred Odendahl
Karl Wanner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0605602A1 publication Critical patent/EP0605602A1/fr
Application granted granted Critical
Publication of EP0605602B1 publication Critical patent/EP0605602B1/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
    • 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
    • B25D2217/0003—Details of shafts of percussive tool bits
    • 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
    • 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
    • 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
    • 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

Definitions

  • the invention is based on a device on handheld power tools according to the preamble of claim 1.
  • a tool holder designed as a drill chuck is known, the rotary driving elements of which are formed by a plurality of gripping segments lying one above the other.
  • the gripping segments have an approximately trapezoidal or circular cross-sectional shape, are curved in profile and merge into curves.
  • the side surfaces of the rotary drivers are therefore uneven and are unfavorable for the transmission of a torque relative to the direction of force application.
  • the device according to the invention with the characterizing features of claim 1 has the advantage that the rotary drivers are both optimally aligned to the requirements for effective torque transmission and also offer reliable guidance and centering of the drilling tool.
  • the device has the further advantage that, despite the possibility of accommodating tool shanks of different thicknesses, the weakening of the tool shank is kept as small as possible for a large torque transmission by the rotary drivers fixedly arranged in the receiving bore.
  • the rotary drivers have guide sections which are at a distance of 4, 5 or approximately 6 mm from the central axis of the receiving bore. This means that tools with 8, 10 or 12 mm shanks can be optimally guided, which ensures excellent concentricity.
  • the arrangement of locking bodies in the area of the rotary drivers is also particularly advantageous. As a result, a weakening of the tool shank is kept within narrow limits. Elastic, flexibly mounted locking bodies automatically withdraw when a tool is inserted and then snap into the tool's axial locking grooves. This increases the ease of use.
  • the axial locking bodies engage in the receiving bore to different extents depending on the shank diameter of the tool used, this can advantageously be used to scan the diameter of the drilling tool and the speed can be set accordingly. It is particularly advantageous here that the scanning takes place purely mechanically and the information obtained is also mechanically passed on via a sleeve, so that the scanning device is insensitive to contamination and remains functional even in rough construction site operation.
  • Tools according to claims 7 ff have the particular advantage that not a unitary shank is required, but depending on the diameter of the tool head, thinner and thicker tool shanks can be inserted into the same tool holder. This is achieved by means of stepped rotary driving grooves, the more steps have to be provided, the greater the difference in diameter of the tools.
  • Figure 1 shows a device on hand machine tools in cross section with a tool shaft of small diameter used.
  • Figures 2 and 3 show the same device with different sized tool shanks.
  • FIG. 4 shows a device with two rotary drivers in a further exemplary embodiment.
  • FIG. 5 shows a longitudinal section through a tool holder according to FIG. 2.
  • the device according to the invention essentially consists of a tool holder 10 and a tool 22 held therein.
  • a basic body 11 with a receiving bore 12 is shown in section of the tool holder 10.
  • three uniformly designed immovable rotary drivers 14 protrude into the receiving bore 12.
  • the rotary drivers 14 are of stepped design, with plane flank portions 16 running radially with respect to a central axis 15 of the tool holder 10 alternating with guide sections 17 which are formed in the circumferential direction in the form of a cylinder jacket.
  • the locating bore 12 itself acts as a guide section.
  • the stepped design of the rotary driver 14 is selected so that the guide sections 17 are located coaxially to the central axis 15 on a cylinder jacket surface with a diameter of 6, 8 and 10 mm.
  • the receiving bore 12 has a diameter of 12 mm.
  • the rotary drivers 14 extend along the receiving bore 12 over a certain distance. Approximately in the middle of this distance, the rotary drivers 14 are penetrated by an opening 19, which also penetrates the base body 11. Locking bodies 20 are inserted into the openings 19, which project beyond the projection surface of the rotary drivers 14 by a certain amount.
  • a tool 22 is clamped in the tool receptacle 10 and has grooves 23 which open out towards its shaft end and extend along the shaft for rotational driving.
  • these are in each case simple, non-stepped grooves with flat side walls 25 arranged radially to the tool axis 24 and an approximately flat base surface 26 connecting the side walls 25.
  • the tool 22 has three troughs 28, one each Represent expansion of the grooves 23.
  • the troughs 28 are advantageously elongated in the axial direction of the tool 22 and are longer than the locking body 20 by the idle travel of the tool.
  • the tool holder 10 has a sliding sleeve 29 which surrounds the base body 11 and the locking body 20 and is longitudinally displaceable within limits (see also FIG. 5). It contains a thickening or a retaining ring 30, which holds the locking body 20 in the troughs 28. On the holding ring 30 there is a sheet metal ring 31 on the side, which has extensions 32 in the area of the locking body 20. The sheet metal ring 31 is pressed by a compression spring 33 onto the sliding sleeve 29 or onto the retaining ring 30.
  • Retaining ring 30 and sheet metal ring 31 can be matched to the locking body 20 so that the position of the sheet metal ring 31 indicates the depth of penetration of the locking body 20 and thus the shank diameter of the inserted tool.
  • the position of the sheet metal ring 31 or a corresponding sleeve can then be used to adjust the speed of the drive motor.
  • the troughs 28, contrary to the illustration in FIGS. 1 to 4, would have to be of different depths depending on the shaft diameter.
  • FIG. 2 shows the same tool holder 10 as shown in FIG. 1, with the only difference that a tool shaft 30 with a larger diameter is now used.
  • the tool 30 also has longitudinal grooves 33, which are each formed from two pairs of side walls 35 offset in the circumferential direction.
  • the grooves 33 are thus stepped, with radial sections 37 being formed between the side walls 35.
  • the radial sections 37 are adapted to the guide sections 17 of the tool holder 10 and extend along a cylindrical surface.
  • FIG. 3 shows a third tool 40 in the tool holder 10 which has remained unchanged.
  • the shank of the tool 40 has a diameter of 12 mm and lies against the receiving bore 12.
  • the grooves 43 are now designed in two stages instead of two stages as in the previous figure. Three pairs of side walls 45 alternate with radial sections 47. Otherwise, the tool 40 corresponds to the tools 22 and 30 previously shown.
  • the second exemplary embodiment according to FIG. 4 differs from the first exemplary embodiment only in that two rotary drivers 14 are formed on the tool holder 10 ′ and only two grooves 33 on the tool 50. It has the particular advantage that tools with two or four grooves can be clamped on the shank.
  • the rotary drivers 14 are brought into register with the grooves 23 and the tool 22 is inserted into the receiving bore 12.
  • the locking bodies 20 When the end of the tool shank reaches the locking bodies 20, they preferably deflect radially outward and snap back into the troughs 28 when the tool is pushed further. It is not readily possible to pull out the tool 23 because the locking bodies 20 are prevented from evading in this direction, for example by a sleeve.
  • this sleeve must first be operated by the operator.
  • the tool 22 is centered and guided on the rotary drivers 14 by the guide sections 17. Despite the immovable rotary driver 14, this results in good concentricity properties.
  • either the rotary drivers can be chamfered on their front edge or the grooves 23 can be chamfered at the shaft end.
  • the centering and guiding is improved by further guide sections 17.
  • the device according to the invention for the transmission of a rotary and / or impact movement to a tool is suitable for its stepped design of the rotary drivers 14 for different shank diameters, without having to change anything on the tool holder 10.
  • Drilling tools with drilling diameters between 4 and 8 mm have a shank diameter of 8 mm and are inserted into the tool holder 10 according to FIG. 1.
  • Tools with a Drill diameters between 8 and 12 mm are given a 10 mm shank according to FIG. 2.
  • Tools with drill diameters greater than 12 mm are equipped with a shank diameter of 12 mm and fit into the tool holder 10 according to the invention according to FIG. 3.
  • the device according to the invention can also be used for mechanical scanning of the size of the tool used.
  • the troughs 28 are designed to be more or less deep with respect to the receiving bore 17. Accordingly, the locking bodies 20 engage in different degrees.
  • the end position of the locking body 20 determines the position of a scanning sleeve within the tool holder, as described in DE 35 06 008 A1 (GB 21 71 340 B), which becomes the content of this document.
  • the speed of the drill is set correctly according to the drill diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Jigs For Machine Tools (AREA)
  • Telephone Function (AREA)
  • Surgical Instruments (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Manipulator (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Drilling Tools (AREA)

Claims (10)

  1. Support d'outil pour machine-outil à main, notamment perceuse ou perforateur à main et comportant, pour transmettre un mouvement de rotation et/ou un mouvement de percussion à un outil (22), plusieurs rainures (23) ouvertes vers l'extrémité de la tige de l'outil pour assurer l'entraînement en rotation et comportant un perçage de réception (12) muni de manière fixe d'organes d'entraînement en rotation (14) en saillie vers l'intérieur, ces organes d'entraînement en rotation venant prendre dans des rainures (23) de l'outil (22), caractérisé en ce que les organes d'entraînement (14) comportent, au moins sur un côté, des flancs (16) étagés dans la direction périphérique, et qui sont dirigés de manière plane et radiale et sont chaque fois reliés par des segments de guidage (17) formés par des segments ayant une forme de bande, dirigés dans la direction longitudinale du perçage de réception (12).
  2. Support d'outil selon la revendication 1, caractérisé en ce que les segments de guidage (17) des organes d'entraînement (14) ont une surface enveloppe cylindrique à la distance de 4, 5 ou 12 mm de l'axe géométrique (15) du perçage de réception (12), pour centrer les tiges d'outils (22a, 30a, 40a) à recevoir.
  3. Support d'outil selon l'une des revendications 1 ou 2, caractérisé en ce qu'au moins deux organes d'entraînement (14) sont disposés en regard l'un de l'autre dans le perçage de réception (12).
  4. Support d'outil selon l'une des revendications précédentes, caractérisé en ce que les organes de verrouillage (20) sont prévus dans la zone de l'extension axiale des organes d'entraînement en rotation (14), ces organes de verrouillage dépassant d'un segment de section (x) la surface de projection des organes d'entraînement en rotation (14), lorsque ces organes sont en position de verrouillage, cette surface de projection étant vue dans la direction axiale du perçage de réception.
  5. Support d'outil selon l'une des revendications précédentes, caractérisé en ce que les organes de verrouillage (20) sont montés de manière souple élastique par rapport à l'action d'une tige d'outil (22) introduite par l'extrémité ouverte du support d'outil (10).
  6. Support d'outil selon l'une des revendications précédentes, caractérisé en ce que les organes de verrouillage axial (20) pénètrent à une profondeur différente dans le perçage de réception (12) suivant le diamètre de la tige de l'outil (22, 30, 40, 50) mise en place.
  7. Support d'outil selon la revendication 6, caractérisé en ce que la position des organes de verrouillage axial (20) est détectée par un manchon ou une bague en tôle (31) et sa position détectée est utilisée pour régler la vitesse de rotation du moteur entraînant la machine-outil à main.
  8. Outil applicable à des mandrins ou à des supports d'outil de perceuses ou de perforateurs à main, notamment selon la revendication 1, comprenant une tige (22a, 30a, 40a), une tête d'outil quelconque et une extrémité d'outil, la tige ayant à sa périphérie des rainures (23, 33, 43) réparties de manière équiangulaire et ouvertes en direction de l'extrémité de la tige, caractérisé en ce que les rainures (23, 33, 43) comportent au moins sur un côté plusieurs parois latérales planes (25, 35, 45) dirigées sensiblement radialement et de manière étagée par rapport à l'axe (24) de l'outil, ces parois étant reliées par des segments en forme de bandes (37, 47) dirigées dans la direction longitudinale de la tige.
  9. Outil selon la revendication 8, caractérisé en ce que les rainures (33, 43) sont plusieurs fois étagées, les parois latérales (35, 45) et les segments, de préférence en forme d'enveloppes cylindriques (37, 47) qui les relient, sont réalisés de manière étagée.
  10. Outil selon la revendication 8 ou 9, caractérisé en ce que dans la zone de l'extension axiale des rainures (23, 33, 43) il y a des gorges (28) pour recevoir les organes de verrouillage (20), ces gorges représentant une extension des rainures (23, 33, 43).
EP92920854A 1991-09-26 1992-09-24 Dispositif monte sur des outils a main mecaniques Expired - Lifetime EP0605602B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4132023 1991-09-26
DE4132023A DE4132023A1 (de) 1991-09-26 1991-09-26 Einrichtung an handwerkzeugmaschinen
PCT/DE1992/000820 WO1993005929A1 (fr) 1991-09-26 1992-09-24 Dispositif monte sur des outils a main mecaniques

Publications (2)

Publication Number Publication Date
EP0605602A1 EP0605602A1 (fr) 1994-07-13
EP0605602B1 true EP0605602B1 (fr) 1996-07-17

Family

ID=6441528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92920854A Expired - Lifetime EP0605602B1 (fr) 1991-09-26 1992-09-24 Dispositif monte sur des outils a main mecaniques

Country Status (8)

Country Link
US (2) US5474139A (fr)
EP (1) EP0605602B1 (fr)
JP (1) JP3253618B2 (fr)
AT (1) ATE140414T1 (fr)
DE (2) DE4132023A1 (fr)
DK (1) DK0605602T3 (fr)
ES (1) ES2090693T3 (fr)
WO (1) WO1993005929A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE4210451A1 (de) * 1992-03-30 1993-10-07 Plica Werkzeugfabrik Ag Mollis Einrichtung zur Drehmomentübertragung
DE4317273A1 (de) * 1993-05-25 1994-12-01 Bosch Gmbh Robert Werkzeugaufnahme für Handbohr- und Schlaggeräte mit SDS-Zusatznut
DE4338818A1 (de) * 1993-11-13 1995-05-18 Hawera Probst Kg Hartmetall Einrichtung an Handwerkzeugmaschinen zur Drehmomentübertragung
GB0105547D0 (en) 2001-03-07 2001-04-25 Black & Decker Inc Tool holder for a rotary hammer or a chisel hammer
GB0121947D0 (en) * 2001-09-12 2001-10-31 Black & Decker Inc Tool holder for hammer
DE10151894A1 (de) * 2001-10-24 2003-05-08 Schmidt Ulrich Ush Schraubwerk Spannfutter zum vereinfachten Einsetzen eines Werkzeugschaftes
ATE460255T1 (de) * 2003-11-26 2010-03-15 Hilti Ag Werkzeugaufnahme für ein drehendes und schlagendes werkzeug
DE10360008B4 (de) * 2003-12-19 2006-04-06 Wacker Construction Equipment Ag Vorrichtung für einen Bohr- oder Schlaghammer mit Werkzeugaufnahme
GB2414701A (en) * 2004-06-05 2005-12-07 Black & Decker Inc Rotary spindle for a power tool
DE102005010265A1 (de) * 2005-03-07 2006-09-14 Robert Bosch Gmbh Werkzeughalter und Handwerkzeugmaschine
DE102006000168A1 (de) * 2006-04-10 2008-01-03 Hilti Ag Werkzeugaufnahme
CN201664908U (zh) 2007-06-15 2010-12-08 布莱克和戴克公司 混合冲击工具
DE102007048262A1 (de) * 2007-10-08 2009-04-09 Robert Bosch Gmbh Handwerkzeugmaschine
US9193053B2 (en) 2008-09-25 2015-11-24 Black & Decker Inc. Hybrid impact tool
US8631880B2 (en) * 2009-04-30 2014-01-21 Black & Decker Inc. Power tool with impact mechanism
US8460153B2 (en) 2009-12-23 2013-06-11 Black & Decker Inc. Hybrid impact tool with two-speed transmission
EP2537611A4 (fr) * 2010-02-15 2014-07-09 Miyanaga Kk Dispositif d'installation et de retrait d'outil de rotation et outil de rotation
US8584770B2 (en) 2010-03-23 2013-11-19 Black & Decker Inc. Spindle bearing arrangement for a power tool
DE102010029609A1 (de) * 2010-06-02 2011-12-08 Hilti Aktiengesellschaft Staubabweisende Werkzeugbremse, Werkzeugeinführteil, Werkzeugaufnahme, Handwerkzeugmaschine
US11007631B2 (en) * 2014-01-15 2021-05-18 Milwaukee Electric Tool Corporation Bit retention assembly for rotary hammer
EP3834968A1 (fr) * 2019-12-11 2021-06-16 Hilti Aktiengesellschaft Dispositif de transmission d'un couple de rotation d'un appareil de forage à une couronne de forage

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DE4210451A1 (de) * 1992-03-30 1993-10-07 Plica Werkzeugfabrik Ag Mollis Einrichtung zur Drehmomentübertragung

Also Published As

Publication number Publication date
US5474139A (en) 1995-12-12
JP3253618B2 (ja) 2002-02-04
ES2090693T3 (es) 1996-10-16
EP0605602A1 (fr) 1994-07-13
ATE140414T1 (de) 1996-08-15
DE59206789D1 (de) 1996-08-22
DE4132023A1 (de) 1993-04-01
DK0605602T3 (da) 1996-11-25
WO1993005929A1 (fr) 1993-04-01
US5706903A (en) 1998-01-13
JPH06510710A (ja) 1994-12-01

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