EP2314420B1 - Machine-outil électrique ayant un fonctionnement à marteau perforateur - Google Patents

Machine-outil électrique ayant un fonctionnement à marteau perforateur Download PDF

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Publication number
EP2314420B1
EP2314420B1 EP10187352A EP10187352A EP2314420B1 EP 2314420 B1 EP2314420 B1 EP 2314420B1 EP 10187352 A EP10187352 A EP 10187352A EP 10187352 A EP10187352 A EP 10187352A EP 2314420 B1 EP2314420 B1 EP 2314420B1
Authority
EP
European Patent Office
Prior art keywords
tool
sleeve
appliance according
drilling sleeve
axial
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
EP10187352A
Other languages
German (de)
English (en)
Other versions
EP2314420A1 (fr
Inventor
Jan-Simon Blind
Michael Kukla
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP2314420A1 publication Critical patent/EP2314420A1/fr
Application granted granted Critical
Publication of EP2314420B1 publication Critical patent/EP2314420B1/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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • 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
    • B25D17/24—Damping the reaction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/006—Parallel drill and motor spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • 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
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0019—Guide-sleeves
    • 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
    • B25D2250/331—Use of bearings
    • B25D2250/335—Supports therefor

Definitions

  • the invention relates to a motor-driven tool device with drill hammer operating mode according to the preamble of claim 1, comprising a drive train and a drill sleeve and hammer mechanism comprehensive power train, wherein the drill sleeve is rotatably mounted relative to a machine housing radially about its longitudinal axis and further for receiving on the tool introduced axial forces via a rolling bearing assembly is axially supported.
  • This may therefore be, for example, a typical hammer drill in which the tool is both driven to rotate and undergoes a shocking action in the axial direction, which is exerted on the tool via a reciprocating so-called racket within the hammer mechanism.
  • a switchability to pure drilling operation and / or pure hammer or chisel operation, ie without rotating drive of the tool is possible in such typical tool devices.
  • DE 34 05 922 C2 describes a hammer drill in which a structural unit of percussion and drive train is supported so damped in the housing that it is supported by an O-ring and elastic axial.
  • the present invention is based on the object, tool devices of the type mentioned above to improve the convenience of operation for the user without sacrificing performance.
  • the damping elements exert an oppositely directed bias on the drill sleeve, so that it is held axially free of play relative to the machine housing.
  • the drill sleeve is thus held by means of the axially acting damping elements, that they are independent of the start of the Tool unit is received under oppositely directed bias and thus definitely held backlash in the machine housing.
  • the efficiency and smoothness is further increased.
  • the tool facing away from the damping element is provided on the side facing away from the drill sleeve side of the rolling bearing assembly. Furthermore, it proves to be advantageous if the tool facing away from the damping element is provided adjacent to and supported against an axial collar of a housing-fixed bearing sleeve.
  • the tool-facing damping element Since during operation of the power tool on the tool-facing damping element typically only small forces are exerted in the axial direction, it proves to be advantageous if the tool-facing damping element is received between two annular disk-shaped support elements, in turn, against two axially facing gradations in the machine housing or radially Support outside of the drill sleeve. On a complex rolling bearing assembly can be omitted here.
  • damping elements are formed annular disk-shaped and surround the drill sleeve concentrically.
  • the damping elements are advantageously formed from an elastomeric plastic material.
  • they may be foamed, polyurethane foam, silicone foam, sponge rubber and the like, for example, being advantageously usable here.
  • the play-free storage produced in the manner according to the invention also compensates production-related tolerances, which makes the production on the one hand less expensive and on the other hand reduces the power loss. It achieves higher efficiency in all modes and higher single beat energy values.
  • FIG. 1 shows a sectional view through a power tool in the form of a typical rotary hammer with optional adjustable hammer mode, Bohr explicatsart and chisel mode. Shown is a part of a drive train 2 in the form of an intermediate shaft 4 and the components of a power take-off 6, comprising a generally designated by the reference numeral 8 hammer mechanism and a drill sleeve 10 and a reciprocating in an anvil guide 12 striker 14.
  • a tool chuck for example, for a drill bit or flat chisel is not shown and can be applied rotatably from the left to the drill sleeve.
  • intermediate shaft 4 is in the mode of operation shown by way of example in drive connection with the drill sleeve 10 by meshing with a rotatably seated on the drill sleeve 10 spur gear 16. Further drives the intermediate shaft 4 via a swash plate assembly 18 and a corresponding to the double arrow 20 back and forth driven drive pin 22 a pressure sleeve 24 in the axial direction 26 back and forth.
  • the pressure sleeve 24 defines in its interior a compressed air cushion 28 between itself and a racket 30 of the hammer mechanism 8.
  • the drill sleeve 10 includes an axial step 38 in the form of a concentric flange 40. With this axial gradation 38 is the drill sleeve 10 axially against a roller bearing assembly 42 with needle bearing elements. Adjacent thereto, an annular disk-shaped support element 44 is provided, against which the damping element 34 rests. On the other side, the damping element 34 bears against a bearing sleeve 46, which is pressed into the machine housing 33. In this way, axial forces that are introduced during operation via the tool on the drill sleeve 10, transmitted in the direction of the machine housing 33 and thereby attenuated by the damping element 34, whereby a high smoothness arises.
  • the tool-facing damping element 36 is supported between facing axial gradations 48, 50 in the machine housing 33 and the drill sleeve 10.
  • a gradation 48 in turn is an annular disk-shaped support member 52 and against the step 50 an annular disk-shaped support member 54, between which the annular disk-shaped damping element 36 is provided.
  • the damping elements 34 and 36 are formed, dimensioned and arranged so that they exert a bias on the drill sleeve 10 even in the unloaded state, so that the drill sleeve 10 is arranged axially backlash in the machine housing 33. Also in this way creates a high level of smoothness, since the drill sleeve can perform vibrations to a much lesser extent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (8)

  1. Outil à moteur avec un mode marteau perforateur comprenant une chaîne cinématique d'entrée (2) et une chaîne cinématique de sortie (6) qui comprend une douille de perçage (10) et un mécanisme de frappe (88), dans lequel la douille de perçage (10) est montée sur palier radial par rapport à un carter de machine (33) pour tourner autour de son axe longitudinal et est en outre appuyée axialement, au moins par l'intermédiaire d'un dispositif de roulement (42), pour recevoir des forces axiales transmises par l'intermédiaire de l'outil, caractérisé en ce que la douille de perçage (10) est tenue dans le carter de machine (33), sur chacun des deux côtés axiaux, par l'intermédiaire d'un élément amortisseur souple élastiquement déformable à action axiale (34, 36).
  2. Outil selon la revendication 1, caractérisé en ce que les éléments amortisseurs (34, 36) exercent une précontrainte l'un en sens inverse de l'autre sur la douille de perçage (10), de sorte que cette dernière est tenue sans jeu axial par rapport au carter de machine (33).
  3. Outil selon la revendication 1 ou 2, caractérisé en ce que l'élément amortisseur (34) éloigné de l'outil est prévu sur le côté du dispositif de roulement (42) qui est éloigné de la douille de perçage (10).
  4. Outil selon la revendication 1, 2 ou 3, caractérisé en ce que l'élément amortisseur (34) éloigné de l'outil est prévu adjacent à un collet de butée axiale d'une douille de palier (46) solidaire du carter, et appuyé contre ce collet.
  5. Outil selon l'une des revendications précédentes, caractérisé en ce que l'un et/ou l'autre des éléments amortisseurs (34, 36) est ou sont prévu(s) entre deux épaulements (38; 48, 50) dirigés axialement l'un vers l'autre, qui sont formés dans le carter de machine (33) et radialement à l'extérieur sur la douille de perçage (10).
  6. Outil selon l'une des revendications précédentes, caractérisé en ce que l'élément amortisseur (36) dirigé vers l'outil est logé entre deux éléments d'appui (52, 54) en forme de disque annulaire qui, de leur côté, prennent appui contre des épaulements (48, 50) dirigés axialement l'un vers l'autre qui sont formés dans le carter de machine (33) et radialement à l'extérieur sur la douille de perçage (10).
  7. Outil selon l'une des revendications précédentes, caractérisé en ce que les éléments amortisseurs (34, 36) sont réalisés en forme de disques annulaires et entourent concentriquement la douille de perçage (10).
  8. Outil selon l'une des revendications précédentes, caractérisé en ce que les éléments amortisseurs (34, 36) sont réalisés en une matière plastique élastomère.
EP10187352A 2009-10-21 2010-10-13 Machine-outil électrique ayant un fonctionnement à marteau perforateur Active EP2314420B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009050014A DE102009050014B4 (de) 2009-10-21 2009-10-21 Motorisch angetriebenes Werkzeuggerät mit Bohrhammerbetriebsart

Publications (2)

Publication Number Publication Date
EP2314420A1 EP2314420A1 (fr) 2011-04-27
EP2314420B1 true EP2314420B1 (fr) 2012-05-09

Family

ID=43587176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10187352A Active EP2314420B1 (fr) 2009-10-21 2010-10-13 Machine-outil électrique ayant un fonctionnement à marteau perforateur

Country Status (3)

Country Link
EP (1) EP2314420B1 (fr)
AT (1) ATE556820T1 (fr)
DE (1) DE102009050014B4 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011081617A1 (de) 2011-08-26 2013-02-28 Hilti Aktiengesellschaft Handgehaltene Werkzeugmaschine
JP2013151055A (ja) 2012-01-26 2013-08-08 Makita Corp 打撃工具
SE537773C2 (sv) * 2012-02-17 2015-10-13 Tools Pc Ab Const Slaganordning innehållande en rekyldämpare
DE102012212231A1 (de) 2012-07-12 2014-01-16 Hilti Aktiengesellschaft Handwerkzeugmaschine
EP3822030A1 (fr) * 2019-11-15 2021-05-19 Hilti Aktiengesellschaft Marteau perforateur et/ou burin avec agencement de mécanisme de percussion

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756993A1 (de) * 1977-12-21 1979-07-05 Duss Maschf Elektropneumatischer hammer mit fangring fuer den schlagkolben
US4431062A (en) * 1980-01-09 1984-02-14 Robert Bosch Gmbh Rotating drive for impact hammer
DE3405922A1 (de) * 1984-02-18 1985-08-22 Robert Bosch Gmbh, 7000 Stuttgart Handwerkzeugmaschine, insbesondere bohr- oder schlaghammer
DE19933972A1 (de) * 1999-07-20 2001-01-25 Bosch Gmbh Robert Bohr- oder Schlaghammer

Also Published As

Publication number Publication date
EP2314420A1 (fr) 2011-04-27
DE102009050014B4 (de) 2013-07-11
ATE556820T1 (de) 2012-05-15
DE102009050014A1 (de) 2011-06-09

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