EP2532486B1 - Porte outil - Google Patents

Porte outil Download PDF

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Publication number
EP2532486B1
EP2532486B1 EP12168787.5A EP12168787A EP2532486B1 EP 2532486 B1 EP2532486 B1 EP 2532486B1 EP 12168787 A EP12168787 A EP 12168787A EP 2532486 B1 EP2532486 B1 EP 2532486B1
Authority
EP
European Patent Office
Prior art keywords
spring
tool holder
tool
output side
radial
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.)
Active
Application number
EP12168787.5A
Other languages
German (de)
English (en)
Other versions
EP2532486A1 (fr
Inventor
Aaron Wiedner
Markus Hartmann
Udo Hauptmann
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 EP2532486A1 publication Critical patent/EP2532486A1/fr
Application granted granted Critical
Publication of EP2532486B1 publication Critical patent/EP2532486B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0042—Ball-shaped locking members
    • 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
    • B25D2250/371—Use of springs
    • 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
    • Y10T279/17042—Lost motion
    • Y10T279/17076—Spreading elements
    • 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

Definitions

  • the present invention relates to a tool holder, in particular for a chiseling, purely chiseling and / or drill-drilling machine tool.
  • the tool holder is particularly designed for chiselling and turning tools having an elongated locking groove on the shaft end, as shown in FIG EP 1 790 424 A1 or EP 0 668 127 A1 and the preamble of claim 1.
  • the tool holder according to the invention has a spindle which has a working axis oriented along an output side open, cylindrical or prismatic receiving space for receiving a tool in the insertion direction and a piercing into the receiving space in the radial direction slot.
  • the spindle can be permanently or detachably connected to a drive of a hand-held power tool, eg a hammer drill.
  • a blocking body for example a ball, protrudes into the slot in the receiving space and is movable between a driven-side end of the slot and a drive-side end of the slot.
  • the number of elongated holes and locking body is not limited to exactly one, it can also be provided a plurality of slots, in each of which exactly one locking body are arranged.
  • a slider is used to push the locking body to the output side end of the slot, wherein the slider is overlapped in the radial direction with the locking body and is acted upon by a first spring against the insertion direction.
  • a radial stop forces the locking body against it in the radial direction to engage in the receiving space.
  • the radial stopper overlaps in a locking position with the driven side end of the slot, whereby the locking body located in the driven side end is prevented from radial movement, and the radial stop is in the insertion direction against the spring force of the first spring for releasing a radial movement of the locking body from the engagement with the receiving space displaceable.
  • a second spring is supported in the insertion direction on the slide and acts on the radial stop against the insertion direction with a spring force.
  • the radial stop overlaps in the basic position in the axial direction with the locking body, whereby the locking body is held engaging in the basic position in the receiving space.
  • the basic position corresponds to a locking position of the tool holder.
  • a user can move the radial stop against the first spring to the drive-side end, after which the blocking body can emerge completely in the radial direction from the receiving space. A lying in the tool holder tool is released by this.
  • the second spring facilitates insertion of the tool when the tool holder is held vertically.
  • the second spring holds the radial stop without actuation of the user overlapping with the output side end of the slot.
  • the user moves when inserting the tool, the locking body including the slider towards the drive end. At the drive end, the locking body can freely deflect radially through the radial stop and release the receiving space.
  • the two springs may be disposed on opposite sides of the slider.
  • Fig. 1 schematically shows a hammer drill 1 as an example of a chiseling hand tool .
  • the hammer drill 1 has a tool holder 2, in which a shank end 3 of a tool, for example one of the drill bit 4, can be used.
  • a primary drive of the hammer drill 1 is a motor 5, which drives a striking mechanism 6 and an output shaft 7 .
  • a user can guide the hammer drill 1 by means of a handle 8 and take means of a system switch 9, the hammer drill 1 is in operation.
  • the hammer drill 1 rotates the drill bit 4 continuously about a working axis 10 and can beat the drill bit 4 in the direction of impact 11 along the working axis 10 in a substrate.
  • the percussion 6 is, for example, a pneumatic percussion 6.
  • a pathogen 12 and a racket 13 are guided in the percussion 6 along the working axis 10 movable.
  • the exciter 12 is coupled via an eccentric 14 or a wobble finger to the motor 5 and forced to a periodic, linear movement.
  • An air spring formed by a pneumatic chamber 15 between exciter 12 and racket 13 couples a movement of the racket 13 to the movement of the exciter 12 at.
  • the racket 13 can strike directly on a rear end of the drill bit 4 or indirectly transfer part of its pulse to the drill bit 4 via a substantially resting intermediate racket 16 .
  • the striking mechanism 6 and preferably the further drive components are arranged within a machine housing 17 .
  • Fig. 2 shows an exemplary embodiment of the tool holder 2.
  • the tool holder 2 has a driven by the output shaft 7 hollow spindle 20 with a receiving space 21 for the tool 4.
  • the tool 4 can through an output-side opening 22 in the insertion direction 23 (opposite to the direction of impact 11 ) in the Recording room 21 are used.
  • the receiving space 21 is preferably complementary to the shaft end 3, for example cylindrical.
  • the balls 24 are inserted into slots 25 in a wall 26 of the hollow spindle 20 .
  • a radial inhibition of the balls 24 takes place by a locking ring 27, on which the balls 24 partially project from the radially inner side into the receiving space 21 .
  • the projecting into the receiving space 21 part of the balls 24 can engage in the locking groove of the tool 4 .
  • a spring loaded slide 28 keeps the balls 24 within the locking ring 27, ie axially overlapping with the locking ring 27th When inserting the tool 24 , the balls are moved against the spring-loaded slide 28 and get out of engagement with the locking ring 27.
  • the balls 24 can dodge radially and release the receiving space 21 .
  • the locking ring 27 can be moved by an actuating sleeve 29 against the spring-loaded slide 28 , whereby the radial inhibition of the balls 24 is released and an inserted tool can be removed.
  • the exemplary spindle 20 has two opposite slots 25 in its shell-shaped wall 26.
  • the slots 25 are aligned parallel to the working axis 10 , a distance of a driven-side end 30 of a drive-side end 31 is preferably greater than a width of the slots 25.
  • a distance of a driven-side end 30 of a drive-side end 31 is preferably greater than a width of the slots 25.
  • one of the balls 24 is inserted.
  • a diameter of the balls 24 is larger than a wall thickness of spindle 20, whereby the balls 24 partly protrude into the receiving chamber 21 and partly project beyond the spindle 20th
  • balls, rollers, rollers, etc. can be used as a blocking body.
  • the locking ring 27 has a radially inwardly facing stop surface 32.
  • the stop surface 32 is preferably cylindrical.
  • a radial distance of the stop surface of the working axis 10 is dimensioned such that the balls 24, the stop surface 32 in contact with the receiving space 21 protrude.
  • An axial dimension of the abutment surface 32 is less than a length of the elongated holes 25 whose distance from the output side end 30 to the drive side end 31.
  • the stop surface 32 and the output side end 30 of the elongated hole 25 overlap along the working axis 10 at a locking position of the locking ring 27, which is also the basic position. In the basic position, there is no axial overlap of the abutment surface 32 with the drive end 31 of the slot 25.
  • For an unlocking position of the locking ring 27 is at least offset axially relative to the output side end 30 that the balls 24 radially escape completely from the receiving space 21 .
  • the exemplary locking ring 27 is material and / or positively connected to the actuating sleeve 29 .
  • the actuating sleeve 29 has a freely accessible outer surface on which the user can grasp it.
  • the actuating sleeve 29 including the locking ring 27 are displaceable by a user from a basic position to the unlocking position.
  • the slider 28 is arranged on the drive side of the balls 24 .
  • the exemplary slider 28 is an annular disc which is slid onto the spindle 20 .
  • the slider 28 is along the working axis 10 relative to the spindle 20, the balls 24 and the locking ring 27 axially movable.
  • the balls 24 and the slider 28 overlap in the radial direction 33, whereby the slider 28 can abut the drive side 24 on the balls.
  • a first spring 34 acts in the direction of impact 11 on the slider 28.
  • the loaded by the first spring 34 slider 28 holds the balls 24 at or near the output side end 30 of the slot 25, whereby the balls 24 are in engagement with the radial stop surface 32 .
  • the locking ring 27 or the actuating sleeve 29 form a driven-side stop for the slider 28, whereby the first spring 34 can act indirectly on the locking ring 27 .
  • the actuating sleeve 29 counteracts the first spring 34 when moving from the basic position to the unlocking position.
  • a second spring 35 is biased between the actuating sleeve 29 and the slider 28 .
  • the second spring 35 contacts the opposite the locking ring 27 axially movable slide 28.
  • the slider 28 solubilisation of the locking ring 27 and the actuating sleeve 29.
  • the second spring 35 acts on the locking ring 27 in the direction of impact 11 and thus holds the locking ring 27 in its normal position near the output-side end 30 of the elongated hole 25th
  • the actuating sleeve 29 has an axial first drive-side contact surface 36 on which the slider 28 rests in the basic position. Along the working axis 10, offset in the direction of impact 11 to the first contact surface 36 , a second drive-side abutment surface 37 is provided. The second spring 35 is applied to this second abutment surface 37 .
  • the two springs 34, 35 may be formed, for example, as coil springs.
  • the first spring 34 exerts a greater force on the slider 28 than the second spring 35.
  • Fig. 3 shows a modification of the tool holder 2, in which the second spring 35 ' and the second bearing surface 37' are varied.
  • the actuating sleeve 29 has a pocket 38, the axial end of the second bearing surface 37 'is formed and in which the second spring 35' is arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (7)

  1. Porte-outil comportant :
    une broche (20) qui a un espace de réception (21) cylindrique ou prismatique, orienté le long d'un axe de travail (10), ouvert côté mené, pour recevoir un outil (4) dans une direction de mise en place (23), et un trou longitudinal (25), débouchant dans l'espace de réception (21) dans une direction radiale (33),
    un corps d'arrêt (24), qui, situé dans le trou longitudinal (25), fait saillie dans l'espace de réception (21), et est mobile entre une extrémité (30) côté mené du trou longitudinal (25) et une extrémité côté menant (31) du trou longitudinal (25),
    un coulisseau (28) pour faire coulisser le corps d'arrêt (24) jusqu'à l'extrémité (30) côté mené du trou longitudinal (25), le coulisseau (28) chevauchant le corps d'arrêt (24) dans la direction radiale (33) et étant sollicité par une force appliquée par un premier ressort (34), contre le direction de mise en place (23),
    une butée radiale (27, 32), contre laquelle le corps d'arrêt (24), adjacent dans la direction radiale (33), est contraint à venir en prise dans l'espace de réception (21) et qui, dans une position bloquante, chevauche l'extrémité (30) côté mené du trou longitudinal (25) et qui peut être déplacée dans la direction de mise en place (23), à l'encontre d'une force élastique du premier ressort (34) pour libérer un mouvement radial du corps d'arrêt (24) hors de prise avec l'espace de réception (21), et caractérisé par
    un second ressort (35), qui est soutenu par le coulisseau (28), dans la direction de mise en place (23), et qui sollicite par une force la butée radiale (27, 32), à l'encontre de la direction de mise en place (23).
  2. Porte-outil selon la revendication 1, caractérisé par une douille d'actionnement (29) pouvant être commandée par un utilisateur pour débloquer l'outil (4), laquelle douille d'actionnement comporte une bague de verrouillage (27) avec la butée (32) orientée radialement vers l'intérieur.
  3. Porte-outil selon la revendication 1 ou 2, caractérisé en ce que le second ressort (35) exerce sur le coulisseau (28) une force élastique plus faible que le premier ressort (34).
  4. Porte-outil selon l'une des revendications précédentes, caractérisé en que le second ressort (35) est sous précontrainte dans chaque position.
  5. Porte-outil selon l'une des revendications précédentes, caractérisé en ce que le premier ressort (34) est agencé côté mené du coulisseau (28) et le second ressort (35) est agencé côté menant du coulisseau (28).
  6. Porte-outil selon la revendication 5, caractérisé en ce que le second ressort (35) est en contact avec le coulisseau (28).
  7. Porte-outil selon la revendication 5 ou 6, caractérisé en ce que le second ressort (35) est en contact avec une douille d'actionnement (29) côté mené.
EP12168787.5A 2011-06-09 2012-05-22 Porte outil Active EP2532486B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011077244A DE102011077244A1 (de) 2011-06-09 2011-06-09 Werkzeugaufnahme

Publications (2)

Publication Number Publication Date
EP2532486A1 EP2532486A1 (fr) 2012-12-12
EP2532486B1 true EP2532486B1 (fr) 2016-03-23

Family

ID=46168168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12168787.5A Active EP2532486B1 (fr) 2011-06-09 2012-05-22 Porte outil

Country Status (4)

Country Link
US (1) US9221165B2 (fr)
EP (1) EP2532486B1 (fr)
CN (1) CN102814797B (fr)
DE (1) DE102011077244A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012206451B4 (de) * 2012-04-19 2020-12-10 Hilti Aktiengesellschaft Handwerkzeugmaschine
US10131042B2 (en) 2013-10-21 2018-11-20 Milwaukee Electric Tool Corporation Adapter for power tool devices
GB201601856D0 (en) * 2016-02-02 2016-03-16 Black & Decker Inc Tool holder connection system
EP3763467A1 (fr) * 2019-07-11 2021-01-13 Hilti Aktiengesellschaft Couvercle de protection anti-poussière à découplage de vibrations
CN112792790A (zh) * 2019-11-13 2021-05-14 金华市聚杰电器有限公司 一种安全脱扣离合器及电锤

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9305463U1 (de) * 1993-04-10 1993-06-24 Crones & Co GmbH, 8800 Ansbach Werkzeughalterung an Handschlaggeräten, insbesondere Meißelhämmern
DE4340728C1 (de) * 1993-11-30 1995-01-26 Bosch Gmbh Robert Einrichtung an Handwerkzeugmaschinen zur Drehmitnahme von Werkzeugen
DE4405697A1 (de) * 1994-02-18 1995-08-24 Black & Decker Inc Werkzeugaufnahme für einen Bohr- und/oder Meißelhammer
JP2983154B2 (ja) * 1995-03-29 1999-11-29 株式会社椿本チエイン 工具保持装置
JP3423497B2 (ja) * 1995-09-06 2003-07-07 株式会社マキタ 携帯工具のビット装着装置
JPH11104974A (ja) * 1997-10-06 1999-04-20 Makita Corp 打撃工具
DE19827172B4 (de) * 1998-06-18 2006-11-09 Robert Bosch Gmbh Werkzeughalter, insbesondere für Bohr-oder Schlaghämmer
US20030089509A1 (en) * 2000-01-22 2003-05-15 Helmut Wanek Hand machine tool
DE10002749A1 (de) 2000-01-22 2001-08-02 Bosch Gmbh Robert Handwerkzeugmaschine
GB2395158B (en) * 2002-11-14 2005-11-16 Black & Decker Inc Tool holder for a rotary hammer
DE102005000168A1 (de) * 2005-11-25 2007-05-31 Hilti Ag Werkzeugaufnahme
US8636287B2 (en) * 2006-04-13 2014-01-28 Insty Bit Acquisition, Llc Automatic tool-bit holder
JP4949886B2 (ja) * 2007-02-16 2012-06-13 株式会社マキタ 打撃工具のチャック機構
DE102007056531A1 (de) * 2007-11-23 2009-05-28 Hilti Aktiengesellschaft Handwerkzeugmaschine mit Schlagwerkzeugaufnahme und zugeordnetes Werkzeug
DE102009028890B4 (de) * 2009-08-26 2014-11-20 Hilti Aktiengesellschaft Werkzeugaufnahme

Also Published As

Publication number Publication date
EP2532486A1 (fr) 2012-12-12
US20120313333A1 (en) 2012-12-13
CN102814797A (zh) 2012-12-12
CN102814797B (zh) 2016-09-14
US9221165B2 (en) 2015-12-29
DE102011077244A1 (de) 2012-12-13

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