EP1147861A2 - Outil électrique à main avec coupure de la percussion - Google Patents

Outil électrique à main avec coupure de la percussion Download PDF

Info

Publication number
EP1147861A2
EP1147861A2 EP01810350A EP01810350A EP1147861A2 EP 1147861 A2 EP1147861 A2 EP 1147861A2 EP 01810350 A EP01810350 A EP 01810350A EP 01810350 A EP01810350 A EP 01810350A EP 1147861 A2 EP1147861 A2 EP 1147861A2
Authority
EP
European Patent Office
Prior art keywords
tool holder
control sleeve
axially
electric hand
gas spring
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
EP01810350A
Other languages
German (de)
English (en)
Other versions
EP1147861B1 (fr
EP1147861A3 (fr
Inventor
Hans-Werner Bongers-Ambrosius
Oliver Muhr
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 EP1147861A2 publication Critical patent/EP1147861A2/fr
Publication of EP1147861A3 publication Critical patent/EP1147861A3/fr
Application granted granted Critical
Publication of EP1147861B1 publication Critical patent/EP1147861B1/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
    • B25D16/00—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • 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
    • B25D2211/003—Crossed 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
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • 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
    • B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves
    • 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
    • B25D2250/131—Idling mode of tools

Definitions

  • the invention relates to an electric hand tool device, for example a rotary hammer or a chisel hammer, with empty stroke shutdown of a pneumatic hammer mechanism.
  • EP759341A3 discloses an empty stroke switch-off for a pneumatic hammer mechanism with an axially fixed, hereinafter referred to as a guide tube, hollow cylinder, inside which an axially movable exciter piston strikes via a gas spring axially movable impact means, hereinafter referred to as a flying piston.
  • a tool in the front axial area inside axially limited tool holder receiving extends up to the axial fixed, rotatable bearing on the rear face in the axial area of the gas spring and radially embraces the guide tube.
  • the tool holder tapers on the inside in three radial steps, the first Stage a limiting front axial stop for a return spring second stage a front axial stop for an axially and radially limited annular damping element for an axially between the tool and the flying piston arranged axially movable strikers and the third stage a front axial stop trains for the die
  • the axially rear area of the tool holder is radial between this and the guide tube an axially via valve openings to the gas spring in Jacket of the guide tube movable control sleeve with a rear axial stop the return pressure spring arranged.
  • the tool can be used when there is no axial pressure on the tool on the third stage striking die, over the striking on the second stage Damping element, an axial displacement of the return pressure spring Control sleeve up to the stop of the return pressure spring at the first stage and This actively releases the valve openings in the guide tube, resulting in no pressure difference can be built to generate a stroke.
  • a disadvantage of such an active blank space shutdown is the one actually used for the valve release necessary, additionally required for the axial release of the control sleeve axial free travel of the striker relative to the tool holder. Because of the bad seal of the striker against dust entry and oil leakage increases the spread of dirt. On the other hand, sufficiently effective die seals increase the overall length and that Reduce weight and reduce by reducing the possible tool holder carrier webs the lifespan of the driver of the tool holder. The multitude of for Parts required for empty runout lead to a high probability of failure of the pneumatic hammer mechanism.
  • DE19724531A1 discloses a further generic blank shutdown pneumatic striking mechanism, in which the tool holder is axially displaceable to a limited extent is executed. If there is no back pressure of the tool, the tool holder is from the anvil via a radial formed inside the tool holder Level or via a return pressure spring acting on the outside of the tool holder moved forward and the valve openings to the gas spring are actively released. To is the tool holder and the guide tube as a rigid component, which is rotatably and axially movable limited. The return pressure spring also provides one working direction upwards, the empty stroke switch-off against the weight.
  • the active empty stroke shutdown is via valve openings leading to the gas spring against the axially fixed guide tube by means of a return pressure spring the housing biased axially displaceable control sleeve, which realizes the jacket partially outside of the guide tube.
  • the Tool through the tool holder which can be moved to a limited extent inside the axially limited step striking striker moved the tool holder forward, the Döpper covers a short axial free travel relative to the tool holder.
  • the stop for the control sleeve which now opens the valve openings, is directly through the Tool holder trained.
  • the control sleeve is rigid in the component of the tool holder integrated. It is therefore only necessary to reach the working point with the for the weight of the tool holder including control sleeve designed return pressure spring just a little effort.
  • the idle path of the striker is relative to the tool holder a fraction of the toolholder free travel required to open the valve openings reduced, which significantly reduces the transport of dirt. It can also the additional axial clearance available due to the reduced free travel be used for the larger design of the tool holder carrier webs, which increases the service life of the tool holder.
  • Fig. 1 as a section through a pneumatic hammer mechanism in the blank, Fig. 2 in the working point.
  • the essentially hollow cylindrical, in the front axial area inside a tool receiving tool holder axially limited movable 6 comprises the guide tube 2 radially.
  • the tool holder 6 tapers in the Interior in three radial stages, the first stage being a limiting front axial Stop for a return pressure spring 7, the second stage a front axial stop for an annular damping element 8 fixed in the tool holder 6 for an axially axially movable striker 9 arranged between the tool and the flying piston 5 and the third stage forms a front axial stop for the anvil 9.
  • the axial rear area of the tool holder 6 is radial between this and the guide tube 2 an axially beyond valve openings 10 to the gas spring 4 in the jacket of the guide tube 2 movable control sleeve 11 with an axial stop for the return pressure spring 7 arranged.
  • FIG. 2 the front position of the working point and in Fig. 1 is the front position at Empty space shown. You can see the empty spring over leading to gas spring 4 Valve openings 10 of the axially fixed guide tube 2 by means of a Return spring 7 biased axially to the tool axis A against the housing displaceable control sleeve 11 realized. If there is no back pressure, the Tool by the axially limited movable at a step inside Tool holder 6 striking anvil 9, the tool holder 6 to the front postponed.
  • the striker 9 sweeps from the working point to the empty stroke relative to Tool holder 6 a short axial free travel 12, preferably in the area [3; 15] mm, which corresponds to only about 1/3 of the tool holder free travel.
  • the attack for the, now opening the valve openings 10, control sleeve 11 is directly through the Tool holder 6 formed, which adjoins the control sleeve 11 adjacent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Power Tools In General (AREA)
  • Actuator (AREA)
EP01810350A 2000-04-18 2001-04-09 Outil électrique à main avec coupure de la percussion Expired - Lifetime EP1147861B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10019071A DE10019071A1 (de) 2000-04-18 2000-04-18 Elekrohandwerkzeuggerät mit Leerschlagabschaltung
DE10019071 2000-04-18

Publications (3)

Publication Number Publication Date
EP1147861A2 true EP1147861A2 (fr) 2001-10-24
EP1147861A3 EP1147861A3 (fr) 2003-11-12
EP1147861B1 EP1147861B1 (fr) 2006-10-11

Family

ID=7639098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01810350A Expired - Lifetime EP1147861B1 (fr) 2000-04-18 2001-04-09 Outil électrique à main avec coupure de la percussion

Country Status (5)

Country Link
US (1) US6431290B1 (fr)
EP (1) EP1147861B1 (fr)
JP (1) JP4758559B2 (fr)
CN (1) CN1186173C (fr)
DE (2) DE10019071A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1754575A3 (fr) * 2005-08-19 2007-07-04 Makita Corporation Outil à impact motorisé
EP1886767A2 (fr) * 2006-08-07 2008-02-13 HILTI Aktiengesellschaft Machine-outil manuelle dotée d'une sonnette pneumatique
EP2033743A2 (fr) 2007-09-05 2009-03-11 Friedrich Duss Maschinenfabrik GmbH & Co. KG Châssis pour un outil motorisé, en particulier un outil électro-manuel

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10156388A1 (de) * 2001-11-16 2003-06-05 Bosch Gmbh Robert Handwerkzeugmaschine mit einem pneumatischen Schlagwerk
JP4016772B2 (ja) * 2001-11-16 2007-12-05 日立工機株式会社 ハンマドリル
JP3976187B2 (ja) * 2002-11-20 2007-09-12 株式会社マキタ ハンマードリル
JP4270887B2 (ja) * 2003-01-10 2009-06-03 株式会社マキタ 電動往復動式工具
GB2401570B (en) * 2003-05-12 2006-07-05 Black & Decker Inc Spindle assembly for hammer drill
DE10333799B3 (de) * 2003-07-24 2005-02-17 Wacker Construction Equipment Ag Hohlkolbenschlagwerk mit Luftausgleichs- und Leerlauföffnung
JP4179159B2 (ja) * 2003-12-18 2008-11-12 日立工機株式会社 打撃工具
DE102004053250A1 (de) * 2004-11-04 2006-05-11 Hilti Ag Tiefenanschlag-Anordnung
JP4664253B2 (ja) * 2006-08-24 2011-04-06 株式会社マキタ 打撃工具
DE102006035417B4 (de) * 2006-11-09 2016-12-01 Hilti Aktiengesellschaft Handwerkzeugmaschine
DE102007000255A1 (de) 2007-05-03 2008-11-06 Hilti Aktiengesellschaft Handwerkzeugmaschine mit geschmiertem Schlagwerk
US8485274B2 (en) 2007-05-14 2013-07-16 Makita Corporation Impact tool
JP4889564B2 (ja) * 2007-05-14 2012-03-07 株式会社マキタ 打撃工具
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
EP3636389A1 (fr) 2012-02-03 2020-04-15 Milwaukee Electric Tool Corporation Marteau rotatif
CN103223660B (zh) * 2013-05-15 2015-02-25 长沙矿山研究院有限责任公司 一种销套式液压冲击器
EP2857150A1 (fr) 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
EP2857149A1 (fr) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
EP2918376A1 (fr) * 2014-03-12 2015-09-16 HILTI Aktiengesellschaft Machine-outil portative de burinage
WO2020056654A1 (fr) * 2018-09-20 2020-03-26 博世电动工具（中国）有限公司 Machine-outil à percussion
CN111390843B (zh) * 2018-12-28 2023-03-28 南京泉峰科技有限公司 电动工具及其控制方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641070A1 (de) * 1976-09-11 1978-03-16 Bosch Gmbh Robert Motorisch angetriebener schlaghammer mit luftfederung
DE3732288A1 (de) * 1987-09-25 1989-04-06 Licentia Gmbh Elektropneumatischer drehschlagbohrhammer
EP0759341A2 (fr) * 1995-08-18 1997-02-26 Makita Corporation Marteau perforateur avec mécanisme de prévention des frappes à vide
DE19714287A1 (de) * 1997-04-07 1998-10-08 Hilti Ag Bohr- und/oder Meisselgerät
DE19724531A1 (de) * 1997-06-11 1998-12-17 Bosch Gmbh Robert Bohrhammer
JPH1158262A (ja) * 1997-08-25 1999-03-02 Makita Corp 打撃工具
JPH11170182A (ja) * 1997-12-15 1999-06-29 Makita Corp 打撃工具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052507B1 (fr) * 1980-11-18 1985-02-13 Black & Decker Inc. Perceuse à percussion
JPH0693151A (ja) * 1992-09-10 1994-04-05 Idemitsu Kosan Co Ltd ポリスチレン系樹脂組成物
JP3574240B2 (ja) * 1995-11-13 2004-10-06 株式会社マキタ ハンマードリル
JP3292972B2 (ja) * 1996-03-29 2002-06-17 株式会社マキタ 打撃工具
DE19714288A1 (de) * 1997-04-07 1998-10-08 Hilti Ag Bohr- und/oder Meisselgerät
JP3582760B2 (ja) * 1997-04-18 2004-10-27 日立工機株式会社 ハンマドリル
DE19810088C1 (de) * 1998-03-10 1999-08-26 Bosch Gmbh Robert Bohr- und/oder Schlaghammer mit in Abhängigkeit von der Einstecktiefe eines Werkzeuges aktivierbarem Schlagwerk

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641070A1 (de) * 1976-09-11 1978-03-16 Bosch Gmbh Robert Motorisch angetriebener schlaghammer mit luftfederung
DE3732288A1 (de) * 1987-09-25 1989-04-06 Licentia Gmbh Elektropneumatischer drehschlagbohrhammer
EP0759341A2 (fr) * 1995-08-18 1997-02-26 Makita Corporation Marteau perforateur avec mécanisme de prévention des frappes à vide
DE19714287A1 (de) * 1997-04-07 1998-10-08 Hilti Ag Bohr- und/oder Meisselgerät
DE19724531A1 (de) * 1997-06-11 1998-12-17 Bosch Gmbh Robert Bohrhammer
JPH1158262A (ja) * 1997-08-25 1999-03-02 Makita Corp 打撃工具
JPH11170182A (ja) * 1997-12-15 1999-06-29 Makita Corp 打撃工具

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 08, 30. Juni 1999 (1999-06-30) -& JP 11 058262 A (MAKITA CORP), 2. März 1999 (1999-03-02) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 11, 30. September 1999 (1999-09-30) -& JP 11 170182 A (MAKITA CORP), 29. Juni 1999 (1999-06-29) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1754575A3 (fr) * 2005-08-19 2007-07-04 Makita Corporation Outil à impact motorisé
US7383895B2 (en) 2005-08-19 2008-06-10 Makita Corporation Impact power tool
EP1886767A2 (fr) * 2006-08-07 2008-02-13 HILTI Aktiengesellschaft Machine-outil manuelle dotée d'une sonnette pneumatique
EP1886767A3 (fr) * 2006-08-07 2008-02-27 HILTI Aktiengesellschaft Machine-outil manuelle dotée d'une sonnette pneumatique
EP2033743A2 (fr) 2007-09-05 2009-03-11 Friedrich Duss Maschinenfabrik GmbH & Co. KG Châssis pour un outil motorisé, en particulier un outil électro-manuel
DE102007042045A1 (de) 2007-09-05 2009-03-19 Friedrich Duss Maschinenfabrik Gmbh & Co.Kg Getriebe für ein kraftgetriebenes Werkzeug, insbesondere ein Elektrohandwerkzeuggerät

Also Published As

Publication number Publication date
US6431290B1 (en) 2002-08-13
JP2001353670A (ja) 2001-12-25
DE50111177D1 (de) 2006-11-23
EP1147861B1 (fr) 2006-10-11
CN1186173C (zh) 2005-01-26
US20020050191A1 (en) 2002-05-02
JP4758559B2 (ja) 2011-08-31
CN1318446A (zh) 2001-10-24
EP1147861A3 (fr) 2003-11-12
DE10019071A1 (de) 2001-10-25

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