EP1332022A1 - Machine-outil manuelle comprenant une bague d'etancheite disposee dans un element de fixation d'outil - Google Patents

Machine-outil manuelle comprenant une bague d'etancheite disposee dans un element de fixation d'outil

Info

Publication number
EP1332022A1
EP1332022A1 EP01988644A EP01988644A EP1332022A1 EP 1332022 A1 EP1332022 A1 EP 1332022A1 EP 01988644 A EP01988644 A EP 01988644A EP 01988644 A EP01988644 A EP 01988644A EP 1332022 A1 EP1332022 A1 EP 1332022A1
Authority
EP
European Patent Office
Prior art keywords
sealing ring
sealing
firing pin
tool holder
tool
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.)
Ceased
Application number
EP01988644A
Other languages
German (de)
English (en)
Inventor
Andre Ullrich
Juergen Schlipf
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 EP1332022A1 publication Critical patent/EP1332022A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • 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
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/365—Use of seals

Definitions

  • the present invention relates to a hand-held power tool with a tool holder which can be driven in a rotating and striking manner, in which a firing pin is axially displaceably mounted, at least one sealing ring surrounding the firing pin being arranged in the tool holder.
  • Such a drilling and impact machine is from
  • the firing pin is to be sealed off from the tool holder in such a way that on the one hand no lubricants escape from the gearbox of the machine tool and on the other hand no dirt from the outside enters the gearbox of the machine through the tool holder.
  • sealing rings (0-rings) are inserted in two radially circumferential grooves of the firing pin, which seal the gap between the firing pin and the inside of the tool holder.
  • the firing pin moves in the axial direction at a frequency of 65 to 85 Hz and an amplitude of 1 to 10 mm.
  • the firing pin moves depending on component tolerances and a thermal
  • the invention is therefore based on the object of creating a sealing ring which experiences as little wear as possible through the movement of the firing pin and thus ensures high tightness over a long operating time of the machine tool.
  • the sealing ring has a plurality of sealing lips resting on the firing pin and in that the sealing ring is provided at least on its machine side flank with one or more radially circumferential recesses.
  • This special shape of the sealing ring gives the sealing lips a very high degree of flexibility, so that they are axial and radial
  • the machine-side sealing lip undergoes a penetration of lubricant (oil or grease) from the transmission space into the at least one recess increased pressure on the firing pin and thus increases the tightness against leakage of lubricant from the gearbox of the machine tool.
  • lubricant oil or grease
  • the sealing lip on the tool side also has a high degree of flexibility, which easily follows the axial and radial movements of the firing pin and thermal expansion of the material and thus provides a high degree of sealing of the gear space of the machine tool against the ingress of Dust caused by the tool holder.
  • both side flanks of the sealing ring with one or more cutouts in order, as already mentioned, to achieve a tightness against the ingress of dust as well as against the escape of lubricant.
  • the sealing ring preferably has a cross-sectional shape that is symmetrical with respect to a radial central plane, so that installation of the sealing ring on the side is impossible.
  • a good adhesion of the sealing ring in the tool holder is achieved in that the sealing ring with its side facing away from the firing pin is fitted in a groove running radially in the tool holder.
  • Tool holder 1 with a receiving bore 2 for a tool, for example a drill or chisel or the like.
  • This tool holder transmits a rotary movement from a drive, not shown, to a tool inserted therein.
  • a firing pin 3 is axially displaceably mounted in the tool holder 1.
  • This firing pin 3 is axially moved back and forth in the tool holder 1 by a drive with a frequency of 65 to 85 Hz and an amplitude of 1 to 10 mm and transmits this movement to a tool inserted in the tool holder 1.
  • a sealing ring 5 is used, which surrounds the firing pin 3.
  • the purpose of this sealing ring 5 is, on the one hand, to prevent leakage of lubricant (grease or oil) from the gear compartment of the machine tool into the tool holder 1 and, on the other hand, to prevent dust from entering the tool holder 1 into the gear compartment.
  • Sealing ring 5 on two in the axial direction of the firing pin 3 parallel sealing lips 6 and 7.
  • the sealing lip 6 facing the inside of the machine takes over the sealing of the gear chamber against the escape of lubricant and the sealing lip 7 facing the tool seals against dust penetrating from the tool holder 1.
  • the sealing ring 5 is thus shaped such that both sealing functions are performed by separate sealing lips 6 and 7.
  • the sealing ring 5 can also have more than two sealing lips.
  • a high degree of flexibility of the sealing lips 6 and 7 is achieved in that the sealing ring 5 is provided on its two side flanks above the sealing lips 6 and 7 with recesses 8 and 9 running radially around the sealing ring. The sealing ring 5 is thereby waisted above the sealing lips 6 and 7, which make them very mobile.
  • a recess 8, 9 does not have to be provided on each side flank of the sealing ring 5.
  • This recess 8 would namely have the effect that lubricant from it Gearbox of the machine tool can penetrate and the underlying sealing lip 6 is pressed with greater pressure on the firing pin 3 by the pressure of the lubricant in the recess 8.
  • the size and depth of the recesses 8 and 9 and, depending on this, the thickness of the sealing lips 6 and 7 have an influence on the flexibility of the sealing lips 6 and 7 and their contact pressure on the firing pin 3.
  • the flexibility of the sealing lips 6 and 7 could be increased further by that not only a recess 8, 9 is provided on each side flank of the sealing ring 5, but several mutually offset radially circumferential recesses.
  • Sealing lips 6 and 7 are rounded off so that they can slide as well as possible on the moving firing pin 3.
  • the sealing ring 5 preferably consists of an elastomeric material.
  • a sealing ring 5 which has a symmetrical cross-sectional shape with respect to a radial center plane 10, no particular installation direction of the sealing ring 5 has to be observed.
  • the area of the sealing ring 5 facing away from the firing pin 3 fills the full width of the annular groove 4 in the tool holder 1 and lies smoothly in the groove.
  • the outer area of the sealing ring 5 experiences high stability and good adhesion in the tool holder 1, so that it is secured against displacement in the axial direction and against rotation about the tool holder axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

Selon la présente invention, une bague d"étanchéité à faibles frottements, qui garantit une bonne étanchéité contre les fuites de lubrifiants vers l"extérieur du compartiment de transmission de la machine-outil, et contre la pénétration de poussière à l"intérieur du compartiment de transmission, présente plusieurs lèvres d"étanchéité (6, 7) reposant sur un percuteur (3) à l"intérieur de la machine-outil. La bague d"étanchéité (4) est dotée, au moins au niveau de son flanc latéral côté machine, d"un ou de plusieurs évidements (8, 9) s"étendant radialement en périphérie. Cela confère aux lèvres d"étanchéité (6, 7) une flexibilité élevée et leur permet de suivre facilement les mouvements du percuteur (3), la bague d"étanchéité (4) étant peu exposée aux frottements et garantissant une étanchéité élevée.
EP01988644A 2000-10-28 2001-10-18 Machine-outil manuelle comprenant une bague d'etancheite disposee dans un element de fixation d'outil Ceased EP1332022A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10053580 2000-10-28
DE10053580A DE10053580A1 (de) 2000-10-28 2000-10-28 Handwerkzeugmaschine mit einem in einer Werkzeughalterung angeordneten Dichtungsring
PCT/DE2001/003981 WO2002034475A1 (fr) 2000-10-28 2001-10-18 Machine-outil manuelle comprenant une bague d"etancheite disposee dans un element de fixation d"outil

Publications (1)

Publication Number Publication Date
EP1332022A1 true EP1332022A1 (fr) 2003-08-06

Family

ID=7661435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01988644A Ceased EP1332022A1 (fr) 2000-10-28 2001-10-18 Machine-outil manuelle comprenant une bague d'etancheite disposee dans un element de fixation d'outil

Country Status (5)

Country Link
US (1) US20030000715A1 (fr)
EP (1) EP1332022A1 (fr)
JP (1) JP2004512477A (fr)
DE (1) DE10053580A1 (fr)
WO (1) WO2002034475A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2409122B (en) * 2003-11-05 2009-06-10 Canon Europa Nv Automatic generation and use of colour profiles for printers
FI121139B (fi) * 2004-02-02 2010-07-30 Sandvik Mining & Constr Oy Hydraulivasara ja työkaluholkki
DE102004043831B4 (de) * 2004-09-10 2021-08-26 Robert Bosch Gmbh Handwerkzeugmaschine mit Schlagbolzendichtung
DE102010013072A1 (de) * 2010-03-26 2011-09-29 Dorma Gmbh + Co. Kg Vorrichtung zum Öffnen und/oder Schließen einer Tür
AU2011230576A1 (en) * 2010-03-26 2012-10-25 Perfect Point Edm Corporation Hand tool sealing devices and methods
US8360167B2 (en) 2010-08-11 2013-01-29 Caterpillar Inc. Composite seal for a hydraulic hammer
US20160039079A1 (en) * 2014-08-11 2016-02-11 Caterpillar Inc. Hydraulic hammer having single piece seal assembly
JP6006375B1 (ja) * 2015-06-18 2016-10-12 サンドビック．マイニング．アンド．コンストラクション．オイ 工具のシール部材及びシール方法
CN108518493B (zh) * 2018-05-03 2019-06-25 温州职业技术学院 一种液压式柱塞截止阀门
EP3763484A1 (fr) * 2019-07-11 2021-01-13 Hilti Aktiengesellschaft Lèvre de scellement au raccordement d'outil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067584A (en) * 1962-02-15 1962-12-11 Black & Decker Mfg Co Sealing ring means for reciprocating piston used in power-operated percussive tool
DE3637354A1 (de) * 1986-11-03 1988-05-05 Bosch Gmbh Robert Werkzeughalter
JP3606021B2 (ja) * 1996-12-13 2005-01-05 日立工機株式会社 衝撃工具
GB9902793D0 (en) * 1999-02-09 1999-03-31 Black & Decker Inc Rotary hammer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0234475A1 *

Also Published As

Publication number Publication date
US20030000715A1 (en) 2003-01-02
WO2002034475A1 (fr) 2002-05-02
DE10053580A1 (de) 2002-06-06
JP2004512477A (ja) 2004-04-22

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