EP2845687A1 - Machine-outil manuelle - Google Patents

Machine-outil manuelle Download PDF

Info

Publication number
EP2845687A1
EP2845687A1 EP13182927.7A EP13182927A EP2845687A1 EP 2845687 A1 EP2845687 A1 EP 2845687A1 EP 13182927 A EP13182927 A EP 13182927A EP 2845687 A1 EP2845687 A1 EP 2845687A1
Authority
EP
European Patent Office
Prior art keywords
holes
working axis
hole
tool
base body
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.)
Withdrawn
Application number
EP13182927.7A
Other languages
German (de)
English (en)
Inventor
Olaf Koch
Ali Shadavakhsh
Erwin Manschitz
Vera Nübel
Helene KAPS
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
Priority to EP13182927.7A priority Critical patent/EP2845687A1/fr
Publication of EP2845687A1 publication Critical patent/EP2845687A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • B25D2250/231—Sleeve details
    • 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
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other

Definitions

  • the present invention relates to a hand tool with a hammer mechanism, in particular a hammer drill or a chisel hammer with a chiseling function.
  • a chisel hammer is for example from the US 6,745,850 known. Its tool holder is designed for a chisel with a hexagonal shaft. A tubular base body of the tool holder has a receiving space with a hexagonal cross-section. The main body is broken radially with a hole. A locking pin is inserted in the hole. A cuff movable along the axis may force the locking pin into engagement with the receiving space to lock the inserted bit along the axis.
  • the locking body of the tool holder for a hammer drill are partially exposed to the blows when chiseling, for example in a blank. Dust in the receiving space and the repetitive movement of the bit also cause the locking bodies to wear out quickly. Therefore, mostly two locking body are used, such as in the US 6,659,473 , The locking bodies are arranged rotationally symmetrically about the axis in order to distribute the load evenly on the locking bodies.
  • the hand tool of the invention has a tool holder.
  • the tool holder includes a tubular body for receiving a tool coaxial with a working axis and locking means for locking the tool in the body.
  • a percussion mechanism has a percussion component which strikes in the direction of impact on the tool arranged in the tool holder.
  • the main body has a coaxial to the working axis, cylindrical or prismatic, opposite to the direction of impact limited by the impact component receiving space for receiving the tool.
  • the base body has at least two holes opening the receiving space in the radial direction. The holes are arranged without rotational symmetry around the working axis.
  • the distance to the next hole is clockwise less than its distance to the next hole in the counterclockwise direction, or vice versa.
  • the distance in one direction is less than 180 degrees in the other direction, which is greater than 180 degrees.
  • the locking device may comprise a locking body, which is inserted in one of the holes.
  • a locking ring is displaceable by the user between a locking body inhibiting position and the locking body releasing position.
  • the inhibition preferably takes place in the radial direction.
  • 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 bit 4, can be used.
  • a primary drive of the hammer drill 1 is a motor 5, which drives a striking mechanism 6 .
  • a user can guide the hammer drill 1 by means of a handle 7 and take means of a system switch 8 to the hammer drill 1 is in operation.
  • the hammer drill 1 proposes the bit 4 repetitively in the direction of impact 9 along the working axis 10 in a substrate.
  • a coupled to the motor 5 rotary drive 11 may also drive the tool holder 2 to rotate about the working axis 10 .
  • the striking mechanism 6 is, for example, a pneumatic percussion 6.
  • An exciter 12 and a racket 13 are movably guided in a guide tube 14 of the percussion mechanism 6 along the working axis 10 .
  • the exciter 12 is coupled via an eccentric 15 or a wobble finger to the motor 5 and forced to a periodic, linear movement.
  • An air spring formed by a pneumatic chamber 16 between exciter 12 and racket 13 couples a movement of the racket 13 to the movement of the exciter 12 at.
  • the racket 13 may be the impact component of the striking mechanism 6 striking the shaft end 3 .
  • a frequently preferred variant utilizes as an impact component a substantially resting intermediate beater 17, which transmits the impact of the beater 13 to the shaft end 3 .
  • the striking mechanism 6 and preferably the further drive components are arranged within a machine housing 18 .
  • the tool holder 2 has a base body 19, which is designed substantially as a tube.
  • the tubular base body 19 has a prismatic or cylindrical cavity, which serves as a receiving space 20 for the shaft end 3 of the bit 4 .
  • the constant along the receiving space 20 cross-section is adapted to the provided chisel 4 .
  • the cross section is hexagonal or circular.
  • the impact component, in this case the intermediate beater 17, with its impact surface 21 delimits the receiving space 20 in the direction of impact 9.
  • the tool holder 2 has a locking device 22, which locks the bit 4 in the receiving space 20 .
  • the locking device 22 has, for example, a ball 23, which projects through a hole 24 in the base body 19 into the receiving space 20 .
  • the ball 23 engages in a groove of the tool 4 and limited in this way its axial movement.
  • a locking ring 25 is axially or rotationally displaceable by the user between a ball 23 inhibiting position and the ball 23 releasing position. Balls are like rollers, pawls, etc. Examples of locking body.
  • Fig. 2 shows a longitudinal section through the base body 19
  • Fig. 3 shows a cross section perpendicular to the working axis 10 in the plane III-III.
  • the wall 26 of the base body 19 is pierced by two elongated holes 24, 27 for the locking body 23 .
  • the holes 24, 27 are oriented along the working axis 10 , ie have their largest dimension parallel to the working axis 10.
  • the holes 24 preferably have each other and to the working axis 10 parallel edges 28.
  • the holes 24 are in and against the direction of impact 9 through Dome-shaped ends 29 completed.
  • the two holes 24, 27 are preferably identical in shape, size and position along the working axis 10 .
  • the main body 19 of this embodiment has exactly two holes 24, 27 for the locking bodies 23, as in FIG Fig.
  • the first hole 24 is thus adjacent in the first circumferential direction 30 to the second hole 27 and at the same time in the opposite second circumferential direction 31 adjacent to the second hole 27 . Between the two holes 24, 27 no further holes are provided.
  • the main body 19 may have further holes in the direction of impact 9 in front of the receiving space 20 , which serve for example for connecting the main body 19 to the rotary drive 11 . However, these other holes are not relevant to the present invention.
  • the cross section in Fig. 3 extends through both holes 24, 27 and illustrates their relative position in the circumferential direction 30.
  • the first hole 24 and the second hole 27 are not arranged rotationally symmetrical about the working axis 10 .
  • the second hole 27 is closer in a circumferential direction 30 to the first hole 24 than in the opposite circumferential direction 31.
  • a first angle 32 between the two holes 24, 27 is determined from the first hole 24 in the circumferential direction 30 to the second hole 27
  • a second angle 33 between the two holes 24, 27 is also determined starting from the first hole 24 but in the opposite circumferential direction 31 .
  • the first angle 32 is less than 180 degrees in the example, eg, 120 degrees.
  • the second angle 33 is greater than 180 degrees, eg 240 degrees.
  • a cross-section, perpendicular to the working axis 10, through the base body outside the holes 24, 27 may have a rotational symmetry, here for example predetermined by the receiving space 20 a hexagonal rotational symmetry.
  • the improved dynamic load capacity is achieved by the non-rotationally symmetrical hole pattern 24, 27 .
  • Particularly effective here proves to be the different distance to neighboring Holes in the circumferential direction 30 and in the opposite circumferential direction 31.
  • the axial dimension of the holes 24, 27 or the axial position of the holes 24, 27 may also be different in order to achieve the non-rotationally symmetric hole pattern 24, 27 .
  • the holes overlap 24, 27 along the working axis 10 to each other to divide a along the working axis 10 running shock wave front in the circumferential direction different sized sections.
  • Fig. 4 illustrates another embodiment, which has exactly three holes 34, 35, 36 .
  • the arrangement of the holes 34, 35, 36 is exemplified with the first hole 34 at 0 degrees, the second hole 35 at 150 degrees and the third hole 36 at 210 degrees.
  • the arrangement has no rotational symmetry.
  • the second hole 35 is spaced apart from the third hole 36 adjacent to it in the circumferential direction 30 only by an angle 37 of 60 degrees but to the first hole 34 adjacent to it in opposite circumferential direction 31 by an angle 38 of 150 degrees.
  • the third hole 36 also has unequal distances to the first hole 34 and second hole 35 adjacent to it in the opposite circumferential directions 30, 31.
  • the first hole 34 is to the second hole 35 adjacent to it in the circumferential direction 30 by an angle 39 of 150 degrees spaced.
  • the third hole 36 adjacent the first hole 34 in the counter-circumferential direction 31 is spaced by the angle 38 from 150 degrees.
  • the arrangement is therefore mirror-symmetrical to a plane which is spanned by the working axis 10 and the vector from the working axis 10 to the first hole 34 .
  • Fig. 5 illustrates in cross-section a further embodiment with three holes 40, 41, 42, which are arranged in pairs different angles 43, 44, 45 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP13182927.7A 2013-09-04 2013-09-04 Machine-outil manuelle Withdrawn EP2845687A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13182927.7A EP2845687A1 (fr) 2013-09-04 2013-09-04 Machine-outil manuelle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13182927.7A EP2845687A1 (fr) 2013-09-04 2013-09-04 Machine-outil manuelle

Publications (1)

Publication Number Publication Date
EP2845687A1 true EP2845687A1 (fr) 2015-03-11

Family

ID=49084880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13182927.7A Withdrawn EP2845687A1 (fr) 2013-09-04 2013-09-04 Machine-outil manuelle

Country Status (1)

Country Link
EP (1) EP2845687A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527207A1 (de) * 1985-07-30 1987-02-12 Bosch Gmbh Robert Bohrfutter fuer drehende und drehschlagende antriebsmaschinen, insbesondere bohrhaemmer
JPS6274510A (ja) * 1985-09-25 1987-04-06 Shibaura Eng Works Co Ltd 振動ドリルにおけるビツトの保持構造
DE4307050A1 (en) * 1992-03-06 1993-09-09 Joran Bor A S Tool holding and driving arrangement for hammer drill - involves tool shank with two 180 deg. opposed driving slots and between them two locking slots slightly offset from 180 deg. to give unique tool location
US5518345A (en) * 1993-12-09 1996-05-21 Hilti Aktiengesellschaft Tool bit and tool bit chuck for manually operated tools
US6659473B2 (en) 2000-09-04 2003-12-09 Hilti Aktiengesellschaft Chuck for a percussion hand-held power tool
US6745850B2 (en) 2001-09-12 2004-06-08 Black & Decker Inc. Tool holder for hammer
EP2492054A1 (fr) * 2011-02-23 2012-08-29 HILTI Aktiengesellschaft Porte-outil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527207A1 (de) * 1985-07-30 1987-02-12 Bosch Gmbh Robert Bohrfutter fuer drehende und drehschlagende antriebsmaschinen, insbesondere bohrhaemmer
JPS6274510A (ja) * 1985-09-25 1987-04-06 Shibaura Eng Works Co Ltd 振動ドリルにおけるビツトの保持構造
DE4307050A1 (en) * 1992-03-06 1993-09-09 Joran Bor A S Tool holding and driving arrangement for hammer drill - involves tool shank with two 180 deg. opposed driving slots and between them two locking slots slightly offset from 180 deg. to give unique tool location
US5518345A (en) * 1993-12-09 1996-05-21 Hilti Aktiengesellschaft Tool bit and tool bit chuck for manually operated tools
US6659473B2 (en) 2000-09-04 2003-12-09 Hilti Aktiengesellschaft Chuck for a percussion hand-held power tool
US6745850B2 (en) 2001-09-12 2004-06-08 Black & Decker Inc. Tool holder for hammer
EP2492054A1 (fr) * 2011-02-23 2012-08-29 HILTI Aktiengesellschaft Porte-outil

Similar Documents

Publication Publication Date Title
EP2295206B1 (fr) Machine-outil à main électrique combinée
EP2585241B1 (fr) Machine-outil portative pourvue d'un mécanisme de percussion
EP0494400A2 (fr) Outil à main avec porte-outil détachable
DE202009000793U1 (de) Angetriebenes Werkzeug
WO2004024397A2 (fr) Outil et porte-outil conçus pour une machine-outil portative
DE10105250A1 (de) Werkzeugeinsatz-Haltevorrichtung in Schlagwerkzeugen
DE1964083B2 (de) Gesteinsbohrmaschine
DE10157831A1 (de) Handwerkzeugmaschine
DE102012202278A1 (de) Handwerkzeugmaschine
EP2495078B1 (fr) Carré conducteur
DE1155657B (de) Handbohrmaschine
DE4313578A1 (de) Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte
WO2014090840A1 (fr) Porte-outil
EP2845687A1 (fr) Machine-outil manuelle
DE7610304U1 (de) Werkzeughalter fuer einen bohrhammer
EP3789161A1 (fr) Machine-outil manuelle
EP2532486B1 (fr) Porte outil
DE102004017940A1 (de) Schlagwerk für eine Handwerkzeugmaschine
DE19717465A1 (de) Elektrowerkzeugmaschine
DE4343583A1 (de) Bohrhammer
EP0489687B1 (fr) Outil pour forer et ciseler
EP0375917A1 (fr) Perceuse
EP3450109A1 (fr) Dispositif à impact, de préférence dispositif à impact portable
EP3551390B1 (fr) Outil
CH651107A5 (en) Sleeve-shaped tool holder for hammer drills

Legal Events

Date Code Title Description
17P Request for examination filed

Effective date: 20130904

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20150912