EP1340596A1 - Mécanisme de percussion à ressort pneumatique - Google Patents

Mécanisme de percussion à ressort pneumatique Download PDF

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Publication number
EP1340596A1
EP1340596A1 EP03405098A EP03405098A EP1340596A1 EP 1340596 A1 EP1340596 A1 EP 1340596A1 EP 03405098 A EP03405098 A EP 03405098A EP 03405098 A EP03405098 A EP 03405098A EP 1340596 A1 EP1340596 A1 EP 1340596A1
Authority
EP
European Patent Office
Prior art keywords
flying piston
striker
pneumatic
radial
radial gap
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
EP03405098A
Other languages
German (de)
English (en)
Other versions
EP1340596B1 (fr
Inventor
Josef Fünfer
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 EP1340596A1 publication Critical patent/EP1340596A1/fr
Application granted granted Critical
Publication of EP1340596B1 publication Critical patent/EP1340596B1/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
    • 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
    • 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
    • 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
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0015—Anvils
    • 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 a pneumatic hammer mechanism for an at least partially hitting hand machine tool such as a chisel hammer or hammer drill.
  • a pneumatic percussion mechanism has a guided and in a guide tube an air spring powered flying piston, which is usually limited to one axially movable striker strikes itself on the front end of a limited axially movable Tool meets.
  • Pneumatic striking mechanisms occur under certain working conditions such as missing Back pressure from the workpiece a look up of the die on the tool, which according to DE3804026 about air passages in the flying piston and a rotatable Guide tube is prevented.
  • the object of the invention is the technologically simple implementation of a Pneumatic striking mechanism of short design without reference.
  • a pneumatic striking mechanism for at least partially the hand-held machine tool strikes a pot-shaped flying piston in its pot space radially inside an anvil penetrates movably within an axial penetration length and with this a damping, pneumatically effective radial gap essentially forms a gastight closed pot space, which is axially by the flying piston driven striker forces within the penetration length to reverse movement.
  • the radial annular gap between the anvil and the flying piston is advantageous formed gap area 3% to 6% of the inside of the flying piston by the anvil formed cross-section of the crosspiece, which results in the usual beat frequencies from 50Hz to 100Hz within 10mm there is a reversal of movement.
  • Hand tool 1 shows one shown in the empty stroke case at the reversal point of movement
  • Hand tool 1 has a cup-shaped flying piston 2, in which a radially inside Döpper 3 penetrates movably within an axial penetration length L on the tool side over part of its outer surface with part of the inner surface of the Flying piston 2 a damping, pneumatically effective radial gap X to an im forms essentially gas-tight closed pot space 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP03405098A 2002-03-01 2003-02-19 Mécanisme de percussion à ressort pneumatique Expired - Lifetime EP1340596B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10209293A DE10209293A1 (de) 2002-03-01 2002-03-01 Pneumatisches Schlagwerk
DE10209293 2002-03-01

Publications (2)

Publication Number Publication Date
EP1340596A1 true EP1340596A1 (fr) 2003-09-03
EP1340596B1 EP1340596B1 (fr) 2010-02-03

Family

ID=27675174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03405098A Expired - Lifetime EP1340596B1 (fr) 2002-03-01 2003-02-19 Mécanisme de percussion à ressort pneumatique

Country Status (5)

Country Link
US (1) US20030221847A1 (fr)
EP (1) EP1340596B1 (fr)
JP (1) JP4340081B2 (fr)
CN (1) CN1442276A (fr)
DE (2) DE10209293A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008074549A1 (fr) * 2006-12-20 2008-06-26 Robert Bosch Gmbh Dispositif de percussion pour une machine-outil à main
WO2013004459A1 (fr) * 2011-07-05 2013-01-10 Robert Bosch Gmbh Dispositif à percussion

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005030340B3 (de) * 2005-06-29 2007-01-04 Wacker Construction Equipment Ag Schlagwerk mit elektrodynamischem Linearantrieb
US7726413B2 (en) 2006-07-01 2010-06-01 Black & Decker Inc. Tool holder for a powered hammer
EP1872910B1 (fr) 2006-07-01 2012-11-21 Black & Decker, Inc. Méthode pour mesurer l'usure du nez d'un piston frappeur dans un marteau perforateur
US7413026B2 (en) 2006-07-01 2008-08-19 Black & Decker Inc. Lubricant system for powered hammer
DE102006000395A1 (de) * 2006-08-07 2008-02-14 Hilti Ag Handwerkzeugmaschine mit pneumatischem Schlagwerk
SE531658C2 (sv) * 2006-10-02 2009-06-23 Atlas Copco Rock Drills Ab Slagverk jämte bergborrmaskin och bergborrigg
US9216502B2 (en) 2008-04-03 2015-12-22 Black & Decker Inc. Multi-stranded return spring for fastening tool
US8534527B2 (en) 2008-04-03 2013-09-17 Black & Decker Inc. Cordless framing nailer
KR101412092B1 (ko) * 2013-11-28 2014-07-02 주식회사 엔와이테크 저소음형 유압 타격 장치
JP6638149B2 (ja) * 2016-05-18 2020-01-29 株式会社マキタ 打撃工具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB173093A (en) * 1920-10-07 1921-12-29 Chicago Pneumatic Tool Co Improvements in power hammers
DE2702128A1 (de) * 1977-01-20 1978-07-27 Metabowerke Kg Motorisch angetriebener hammer, bei dem in einem zylinder ein kolben verschiebbar gefuehrt ist
DE2929191A1 (de) * 1979-07-19 1981-01-29 Metabowerke Kg Elektropneumatischer hammer
DE3804026A1 (de) * 1987-12-21 1989-08-24 Bosch Gmbh Robert Motorisch angetriebener meissel- oder bohrhammer
JPH07328955A (ja) * 1994-06-09 1995-12-19 Hitachi Koki Co Ltd ハンマドリル

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2844086A1 (de) * 1978-10-10 1980-04-30 Bosch Gmbh Robert Handwerkzeugmaschine, insbesondere schlaghammer
DE2844109A1 (de) * 1978-10-10 1980-04-24 Bosch Gmbh Robert Handwerkzeugmaschine, insbesondere bohr- und/oder schlaghammer
US4462467A (en) * 1981-11-09 1984-07-31 Hilti Aktiengesellschaft Percussion drill machine
US4582144A (en) * 1984-04-25 1986-04-15 Makita Electric Works, Ltd. Percussive tools
DE10032949A1 (de) * 2000-07-06 2002-01-17 Hilti Ag Schraubgerät

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB173093A (en) * 1920-10-07 1921-12-29 Chicago Pneumatic Tool Co Improvements in power hammers
DE2702128A1 (de) * 1977-01-20 1978-07-27 Metabowerke Kg Motorisch angetriebener hammer, bei dem in einem zylinder ein kolben verschiebbar gefuehrt ist
DE2929191A1 (de) * 1979-07-19 1981-01-29 Metabowerke Kg Elektropneumatischer hammer
DE3804026A1 (de) * 1987-12-21 1989-08-24 Bosch Gmbh Robert Motorisch angetriebener meissel- oder bohrhammer
JPH07328955A (ja) * 1994-06-09 1995-12-19 Hitachi Koki Co Ltd ハンマドリル

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04 30 April 1996 (1996-04-30) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008074549A1 (fr) * 2006-12-20 2008-06-26 Robert Bosch Gmbh Dispositif de percussion pour une machine-outil à main
US8011443B2 (en) 2006-12-20 2011-09-06 Robert Bosch Gmbh Striking mechanism for a handheld power tool
WO2013004459A1 (fr) * 2011-07-05 2013-01-10 Robert Bosch Gmbh Dispositif à percussion
US20140144658A1 (en) * 2011-07-05 2014-05-29 Robert Bosch Gmbh Percussion mechanism apparatus

Also Published As

Publication number Publication date
JP2003266332A (ja) 2003-09-24
US20030221847A1 (en) 2003-12-04
DE50312392D1 (de) 2010-03-25
CN1442276A (zh) 2003-09-17
JP4340081B2 (ja) 2009-10-07
EP1340596B1 (fr) 2010-02-03
DE10209293A1 (de) 2003-09-18

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