EP0655299A2 - Dispositif pour des outils à main pour l'entrainement des outils - Google Patents

Dispositif pour des outils à main pour l'entrainement des outils Download PDF

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Publication number
EP0655299A2
EP0655299A2 EP94117161A EP94117161A EP0655299A2 EP 0655299 A2 EP0655299 A2 EP 0655299A2 EP 94117161 A EP94117161 A EP 94117161A EP 94117161 A EP94117161 A EP 94117161A EP 0655299 A2 EP0655299 A2 EP 0655299A2
Authority
EP
European Patent Office
Prior art keywords
locking
tool
tool holder
locking body
depth
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
EP94117161A
Other languages
German (de)
English (en)
Other versions
EP0655299B1 (fr
EP0655299A3 (fr
Inventor
Alfred Dipl.-Ing. Odendahl
Heinz Dipl.-Ing. Neubert
Hans-Peter Dipl.-Ing. Meyen
Horst Sigg
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 EP0655299A2 publication Critical patent/EP0655299A2/fr
Publication of EP0655299A3 publication Critical patent/EP0655299A3/fr
Application granted granted Critical
Publication of EP0655299B1 publication Critical patent/EP0655299B1/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
    • B25D2217/003—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
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/221—Sensors
    • 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
    • Y10T279/17085—Key retainer
    • 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
    • Y10T279/17811—Reciprocating sleeve
    • 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

Definitions

  • the invention relates to a device on hand-held power tools for the rotary driving of striking and / or drilling tools according to the preamble of claim 1 and a tool and tool holder used in the process.
  • Such a device is known from DE-OS 25 51 125, the receiving bore of the tool holder having two mutually opposite rotary drive bars which engage in corresponding rotary drive grooves in the shank of the tools used here.
  • the device according to the invention for the driving of striking and / or drilling tools the characterizing features of claim 1 the advantage that the rotary driving is considerably improved by the at least one locking body, which now engages deeper in the working position at the front end of the locking troughs, so that the wear of the rotary driver is reduced even in the case of powerful machines and tools.
  • the improved tool shank with the characterizing features of claim 5 can be used not only for a tool holder with the characterizing features of claim 9 but also for machines with an "SDS-plus" tool holder without their impairment, i.e. is compatible. It is also advantageous that the axial locking of the tools is not impaired by the improved rotary driving and thus remains fully effective. In addition, the greater axial engagement length of the at least one locking body in the locking recess of the tool shaft compared to the locking balls used to date improves the tool guide, which is particularly advantageous when the tool is pushed away or levered sideways.
  • FIG. 1 shows a tool holder of a hammer drill with inserted tool in longitudinal section in an enlarged view
  • FIG. 2 shows a cross section of the tool holder according to 11-11 from FIG. 1.
  • FIG. 3 shows a cross section through a tool shaft according to 111-111 from FIG. 4 which together with FIG. 5 represent the insertion end of a tool shank with the depth of the locking recesses increasing linearly towards the front.
  • Figure 6 shows a longitudinal section through an appropriately designed locking body together with the tool holder.
  • FIG. 7 shows, as a further exemplary embodiment, a cross section through a tool holder with an inserted tool shaft
  • FIG. 8 shows a tool shaft with a stepped depth of the locking recesses.
  • the device according to the invention on machine tools for the rotary driving of striking and / or drilling tools, in particular on impact drills and hammer drills or impact devices essentially consists of a tool holder 10 and a tool shaft 11 inserted therein of a tool 12 used for drilling and / or striking.
  • the tool holder 10 is non-rotatably seated at the end of a driven, hollow cylindrical tool Spindle 13 of a hammer drill 14.
  • a striker 15 is axially movably guided in the tool spindle and is cyclically struck on the end face of the tool shank 11 by a striking mechanism in a known manner, not shown.
  • the tool holder 10 consists essentially of a tubular tool holder 16 with a receiving bore 17 for the tool shank 11 and two locking bodies 19 inserted into openings 18 of the tool holder 16.
  • a locking sleeve 20 is arranged concentrically to the tool holder 16, which is arranged by a Compression spring 21 locks the locking body 19 in the rest position shown.
  • the tool 12 is provided on the tool shank 11 with two mutually opposite rotary driving grooves 23 which are open towards the shaft end and into which two axially extending rotary drivers 24 projecting inward in the receiving bore 17 (see FIG. 6) engage.
  • the rotary drivers 24 are arranged 90 to the locking body 19 on the circumference of the tool holder 16.
  • two mutually opposite, axially extending locking troughs 25 on the circumference of the tool shaft 11 are offset by 90 to the rotary driving grooves 23 of the tool shaft 11.
  • the locking troughs 25 already end in front of the rear end of the tool shaft 11, so that the locking bodies 19 engaging therein limit the axial movement of the tool 12 in the tool holder 16.
  • the sliding sleeve 22 is released again and the compression spring 21 now presses the locking sleeve 20 with the sliding sleeve 22 axially forward, so that the locking bodies 19 engage radially in the locking recesses 25 and from the locking sleeve 20 are locked in this position so that they secure the tool 12 against falling out.
  • the locking troughs 25 of the tool shank 11 are designed in their axial course such that they are deeper in the front area than in the rear area.
  • the locking bodies 19 assigned to them are arranged radially displaceably in the tool holder 16 in such a way that they engage deeper into the locking troughs 25 at the front area of the locking troughs 25 - and thus in the working position of the tool 12 - than in the rear area, i.e. in the idle position.
  • the locking bodies 19 are in their locked position by the locking sleeve 20 radially yielding out in the opening 18 of the tool holder 16 by a spring element 26 is arranged between a locking body 19 and the locking sleeve 20, which the locking body 19 radially pushes inwards.
  • the locking troughs 25 are made flatter in their rear area, which is used in the idle position, ie less deep than in their front area, which is used in the working position.
  • the depth of the locking troughs 25 increases only in the rear area, approximately up to half of their axial length and remains the same depth in the front area. Furthermore, it can be seen that the locking bodies 19 are longer than wide or approximately half as long as the locking troughs 25 and, viewed in the axial direction, are of the same height and the same thickness except for the rounded ends. From Figure 2 it can be seen that the locking troughs have an axially extending flat flank 27 with increasing depth on their long sides, which with a corresponding axially extending flat flank 28 on the long sides of the locking body 19 to form the additional rotation take along. This increases the area or flank for the additional rotary drive compared to previously used locking balls or rollers not only by a deeper immersion, but also by the length of the contact shoulder, so that the pressure on the rotary driving surfaces is reduced.
  • such a flank is only required on the side of the locking troughs 25 and the locking body 19 lying in the direction of rotation.
  • a different design is possible both in this and in the other exemplary embodiments, provided that the engagement of the locking bodies 19 in their locking recesses 25 is not hindered thereby.
  • the flat flanks 27 and 28 of the two long sides of the locking troughs 25 and the locking body 19 each run parallel to one another.
  • the locking bodies 19 have a hump-shaped, radially inner side that extends in the axial direction and is delimited by the flanks 28 running parallel to one another on the long sides of the locking bodies 19.
  • FIGS. 3 to 6 show a further exemplary embodiment of a device according to the invention for a rotary hammer for the rotary driving of percussion drilling tools.
  • FIG. 3 shows a cross section through the tool shaft 11 of a tool 12a in the rear end region of the locking recesses 25a.
  • the depth of the locking recesses 25 a increases linearly from the rear to the front end in this exemplary embodiment.
  • the tool shank 11 shown rotated by 90 in FIG. 5 also shows that the locking troughs 25a remain the same width over their entire axial length, so that flanks 27a for an additional turning take place also with increasing depth of the locking troughs.
  • the locking body 19a is designed here or arranged in the tool holder 16a in such a way that the area of the locking body 19a engaging in the locking troughs 25a protrudes axially towards the inside to an increasing extent from the receiving bore 17a as the depth the locking troughs 25 increases.
  • the locking body 19a in the position shown, locked by the locking sleeve 20 is guided by the spring element 26 radially outward in the opening 18 to the extent that the locking body 19a as the tool shaft slides forward from the (rising in the axial direction) bottom of the locking trough 25a is pressed radially outward until it finally abuts the locking sleeve 20 in the end region of the locking recess 25a.
  • the rotary drivers 24 and the locking bodies 19 and 19a Start at the same height in the receiving bore 17 or 17a of the tool holder and engage in the rotary driving grooves 23 and locking recesses 25 which also start at the same height of the tool shank 11 or 11.
  • the locking bodies 19 and 19a can be selected considerably longer than in the previous tool holders, but at least half as long as the locking troughs 25 and 25a.
  • FIG. 7 shows a cross section through a tool holder 10b with a tool shank 11 of a tool inserted therein.
  • a longitudinal groove 29 is also incorporated here, into which a strip 30 engages as an additional rotary drive on the inwardly directed end face of the locking body 19b projecting further inwards according to FIG. 6 .
  • the locking bodies 19b are each seated in a radial opening 18 in the tool holder 16, which is concentrically surrounded by a locking sleeve 20a.
  • a solid body 26a is provided in the opening 18 of the tool holder 16, which is made of an elastically deformable material such as rubber, plastic and the like.
  • the locking bodies 19b are thus also locked radially elastically in the working position shown via the solid bodies 26a.
  • the locking bodies 19b rest against the shaft 11b of the tool inserted into the tool holder 16 with a defined pressure by means of the compressed solid body 26a. This pressure dampens the relative movement of the tool when idling.
  • the solid body 26a thus simultaneously serves as a damping body for the axial forward movement of the tool when the machine is idling.
  • the locking sleeve is rotated in the direction of the arrow, preferably in the direction of rotation of the tool, relative to the tool holder 16 until a correspondingly wide and deep recess 31 on the inside of the locking sleeve 20a passes over the respective solid body 26a, so that the latter can escape to the outside and release the locking body 19b.
  • the tool shank 11 b can be pushed into the tool holder 16 or pushed out of it.
  • the radial immersion movement of the locking bodies when engaging in the tool shank can also be used to control the impact performance of the hammer drill depending on the tool type, in that the locking recesses are designed to have different depths depending on the tool type.
  • Either the immersion depth of a locking body can be sensed by a sensor or, as in the exemplary embodiment according to FIG. 7, the pressure of the spring element designed as a solid body 26a on the locking body 19b for controlling the impact strength of the machine tool can be recorded by a sensor 32, which is shown, for example, in FIG 7 is attached to the inside of the locking sleeve 20a.
  • the sensor 32 acts on the impact strength of the machine tool via electronics, not shown.
  • the solution principle realized with the solid bodies 26a can of course also be implemented with an axially displaceable locking sleeve 20 with a corresponding axial arrangement of the recesses 31.
  • the longitudinal axis of the locking troughs 25a is inclined relative to the axis of rotation of the tool 12a, i.e. towards the front, the locking troughs 25a become deeper.
  • the locking troughs can also be divided into sections of different depths.
  • the locking troughs 25c of the tool shank 11 have two sections of different depths, the rear, flat section 33 smoothly merging into the front, lower section 34 by means of an inclined ramp 35. The work intervention of the tool is coded via these stages.
  • the locking body 19 engages in the deeper section 34 in the working position of the tool and thus ensures better rotational driving.
  • the impact performance of the machine tool can be adjusted by the immersion depth of the locking body as described in FIG. 7.
  • the constructive design of the ramp at the step transition of the locking recess 25c between the idle position and the working position ensures a smooth transition to impact operation.
  • the ramp can also be designed in the form of a curve.
  • the invention is not restricted to the exemplary embodiments shown.
  • Essential to the invention is an improved rotational driving by a locking body 19, 19a, 19b engaging deeper in the front section of the locking troughs 25, 25a, 25b, 25c; the flanks 27 and 28 can also be formed radially or wedge-shaped on their sides or curved according to FIG. 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Drilling Tools (AREA)
EP94117161A 1993-11-30 1994-10-31 Dispositif pour des outils à main pour l'entrainement des outils Expired - Lifetime EP0655299B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4340728 1993-11-30
DE4340728A DE4340728C1 (de) 1993-11-30 1993-11-30 Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen

Publications (3)

Publication Number Publication Date
EP0655299A2 true EP0655299A2 (fr) 1995-05-31
EP0655299A3 EP0655299A3 (fr) 1995-09-06
EP0655299B1 EP0655299B1 (fr) 1999-04-28

Family

ID=6503774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117161A Expired - Lifetime EP0655299B1 (fr) 1993-11-30 1994-10-31 Dispositif pour des outils à main pour l'entrainement des outils

Country Status (6)

Country Link
US (1) US5558478A (fr)
EP (1) EP0655299B1 (fr)
JP (1) JPH07185913A (fr)
CN (1) CN1046879C (fr)
DE (2) DE4340728C1 (fr)
DK (1) DK0655299T3 (fr)

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DE19604282A1 (de) * 1996-02-07 1997-08-14 Bosch Gmbh Robert Werkzeughalter mit Aufnahme für verschiedene Werkzeugsysteme
JP3359288B2 (ja) * 1998-06-30 2002-12-24 政人 石井 チャック
US6261035B1 (en) * 1998-11-12 2001-07-17 Black & Decker Inc. Chuck, bit, assembly thereof and methods of mounting
EP1769868B1 (fr) * 1998-11-12 2012-08-01 Black & Decker, Inc. Mandrin et procédé d'assemblage de ce dernier
ATE270598T1 (de) 1999-07-21 2004-07-15 Black & Decker Inc Angetriebenes futter
US6474656B1 (en) * 1999-07-21 2002-11-05 Black & Decker Inc. Power drivable chuck
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DE10043416A1 (de) * 2000-09-04 2002-03-14 Hilti Ag Schlagendes Handwerkzeuggerät mit Werkzeugaufnahme
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US6533291B2 (en) 2001-02-14 2003-03-18 Power Tool Holders Incorporated Chuck having quick change mechanism
GB0105547D0 (en) 2001-03-07 2001-04-25 Black & Decker Inc Tool holder for a rotary hammer or a chisel hammer
US6702090B2 (en) 2001-03-14 2004-03-09 Milwaukee Electric Tool Corporation Power tool and spindle lock system
US6651990B2 (en) * 2001-08-06 2003-11-25 Ryobi Ltd. Tool holder
GB0121947D0 (en) 2001-09-12 2001-10-31 Black & Decker Inc Tool holder for hammer
US6834864B2 (en) * 2001-10-24 2004-12-28 Power Tool Holders Incorporated Chuck having quick change mechanism
US7063201B2 (en) * 2001-11-27 2006-06-20 Milwaukee Electric Tool Corporation Power tool and spindle lock system
US6929266B2 (en) * 2002-06-18 2005-08-16 Black & Decker Inc. Bit holder
DE10241054A1 (de) * 2002-09-05 2004-03-18 Robert Bosch Gmbh Werkzeug und Werkzeughalter für eine Handwerkzeugmaschine
DE10243288B4 (de) * 2002-09-18 2013-02-21 Robert Bosch Gmbh Werkzeugaufnahme
GB2393931A (en) * 2002-10-10 2004-04-14 Black & Decker Inc Tool for a rotary hammer
DE10357380A1 (de) * 2003-12-05 2005-06-30 Hilti Ag Einsteckende für ein drehendes und/oder schlagendes Werkzeug
GB2414701A (en) * 2004-06-05 2005-12-07 Black & Decker Inc Rotary spindle for a power tool
DE102004054685A1 (de) * 2004-11-12 2006-05-18 Hilti Ag Werkzeugaufnahme
JP4621489B2 (ja) * 2004-12-09 2011-01-26 株式会社マキタ 工具保持装置
DE102005000097A1 (de) * 2005-07-28 2007-02-01 Hilti Ag Schlagwerkzeugaufnahme
JP4552843B2 (ja) * 2005-12-09 2010-09-29 パナソニック電工株式会社 打撃工具用アダプター
DE102006036955A1 (de) * 2006-08-08 2008-02-14 Robert Bosch Gmbh Werkzeugaufnahme
SE531224C2 (sv) * 2007-03-30 2009-01-20 Seco Tools Ab Verktyg med utbytbar spets
US7770660B2 (en) 2007-11-21 2010-08-10 Black & Decker Inc. Mid-handle drill construction and assembly process
US7798245B2 (en) 2007-11-21 2010-09-21 Black & Decker Inc. Multi-mode drill with an electronic switching arrangement
US7762349B2 (en) 2007-11-21 2010-07-27 Black & Decker Inc. Multi-speed drill and transmission with low gear only clutch
US7717191B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode hammer drill with shift lock
US7735575B2 (en) 2007-11-21 2010-06-15 Black & Decker Inc. Hammer drill with hard hammer support structure
US7854274B2 (en) 2007-11-21 2010-12-21 Black & Decker Inc. Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing
US7717192B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode drill with mode collar
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EP0272209A2 (fr) * 1986-12-17 1988-06-22 HILTI Aktiengesellschaft Outil à main

Also Published As

Publication number Publication date
EP0655299B1 (fr) 1999-04-28
DK0655299T3 (da) 1999-11-08
CN1046879C (zh) 1999-12-01
CN1107768A (zh) 1995-09-06
DE59408169D1 (de) 1999-06-02
DE4340728C1 (de) 1995-01-26
US5558478A (en) 1996-09-24
JPH07185913A (ja) 1995-07-25
EP0655299A3 (fr) 1995-09-06

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