EP2085189B1 - Outil d'entraînement à combustion de gaz - Google Patents

Outil d'entraînement à combustion de gaz Download PDF

Info

Publication number
EP2085189B1
EP2085189B1 EP09100019A EP09100019A EP2085189B1 EP 2085189 B1 EP2085189 B1 EP 2085189B1 EP 09100019 A EP09100019 A EP 09100019A EP 09100019 A EP09100019 A EP 09100019A EP 2085189 B1 EP2085189 B1 EP 2085189B1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
fuel
ignition
fuel inlet
combustion
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.)
Not-in-force
Application number
EP09100019A
Other languages
German (de)
English (en)
Other versions
EP2085189A2 (fr
EP2085189A3 (fr
Inventor
Thorsten Sauer
Norbert Heeb
Tilo Dittrich
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 PL09100019T priority Critical patent/PL2085189T3/pl
Publication of EP2085189A2 publication Critical patent/EP2085189A2/fr
Publication of EP2085189A3 publication Critical patent/EP2085189A3/fr
Application granted granted Critical
Publication of EP2085189B1 publication Critical patent/EP2085189B1/fr
Not-in-force 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
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure

Definitions

  • the present invention relates to a combustion-powered setting tool, the type mentioned in the preamble of claim 1.
  • Such setting devices can, for. B. be operated with gaseous or vaporizable liquid fuels.
  • a setting piston is then driven by expanding combustion gases to drive a fastener into a workpiece.
  • the fuel is injected into the combustion chamber and mixed with the air located in the combustion chamber via a fan or fan located in the combustion chamber.
  • the turbulence necessary for combustion is generated.
  • the fan flushes the combustion products from the combustion chamber and sucks in fresh air.
  • the fan continues to operate after flushing and is switched off after a defined period of time.
  • the fan is driven by a motor, preferably an electric motor.
  • the ignition of the air-fuel mixture located in the combustion chamber via an ignition device, the z. B. includes a spark plug.
  • From the EP 1 693 158 A1 is a generic combustion-powered setting tool with a combustion chamber and a fan arranged in the combustion chamber known.
  • the fan can be driven by a motor, which is arranged in a receptacle of a cylinder head designed as a rear combustion chamber wall. Passed through the cylinder head is a fuel inlet opening into the combustion chamber of a fuel line for introducing fuel into the combustion chamber. Also arranged on the cylinder head is designed as a spark plug ignition means of an ignition device. Both the spark plug as well as the fuel inlet into the combustion chamber are arranged downstream of the fan in the flow direction.
  • a disadvantage of this solution is that ignition of the air-fuel mixture is only possible when the fuel injected into the combustion chamber has largely uniformly distributed turbulent.
  • the user must therefore operate the trigger switch, which triggers the ignition, only after the injection of the fuel into the combustion chamber (the injection process is usually initiated by the pressing movement of the setting tool on a workpiece), in order to ensure a reliable ignition. This necessary delay time can be perceived as disturbing by the user. If the injection of the fuel triggered by a pressing movement of the setting device to a workpiece, then a biasing and pressing the trigger switch during or immediately after a pressing movement lead to ignition problems.
  • the object of the present invention is to provide a combustion-driven setting tool of the aforementioned type, in which already after a minimum delay time between the injection of the fuel into the combustion chamber and the pressing of the setting device to a workpiece and the triggering of a setting process on the trigger switch, the setting a fastener trouble-free and with sufficient driving energy is possible.
  • both the fuel inlet and the ignition means are arranged at the first end of the combustion chamber, which is opposite to the second end with the fan.
  • both the fuel inlet and the ignition means now lie in the direction of flow of the flow generated by the fan, which surprisingly can be ignited successfully shortly after the injection of the fuel, without the ignition flame being blown out.
  • locally ignitable mixing ratios develop at the phase boundary of the fuel droplets in the two-phase mixture of air and fuel.
  • This concentration of incompletely evaporated fuel droplets in the area of the ignition means is advantageously utilized in order to be able to reliably ignite after very short delay times and despite not optimal mixing of air and fuel, and this without detectable power reduction.
  • the fuel inlet and the ignition means are based on the combustion chamber axis on radials which are at an angle to each other, which is between 5 ° and 180 °, preferably between 30 ° and 120 °.
  • at least partial wetting of the ignition means can be achieved with fuel droplets, which is a good ignitable air-fuel mixture in the immediate vicinity of the ignition means and thus a good ignitability of the air-fuel mixture in total causes, even if the evaporation of the fuel and the mixing with the air in the combustion chamber is not yet optimal.
  • a further advantage is that the fan is operable in one direction of rotation and that the ignition in the direction of rotation is behind the fuel inlet, whereby the ignitability of the air-fuel mixture can be further improved.
  • the setting device 10 has a one-piece or multi-part housing, generally designated 11, in which a drive 12 which can be operated by means of an air-fuel mixture is arranged.
  • a fastener such as a nail, bolts, etc. are driven into a workpiece.
  • the fasteners may, for. B. be stored in a magazine on setting tool 10.
  • the drive includes, inter alia, a combustion chamber 15 and a guide cylinder 13, in which a setting piston 14 is arranged axially displaceable.
  • the combustion chamber 15, which defines a combustion chamber axis A, is located in the in Fig. 1 illustrated initial state circumferentially of a combustion chamber sleeve 28, and axially at a first end 31 of the setting piston 14 and an annular combustion chamber wall 29 and at a second end 32 of a combustion chamber rear wall 30 which is formed as a cylinder head limited.
  • a fan 16 which is arranged in the combustion chamber 15 in the region of its second axial end 32 and can be driven by a motor 17, serves both to generate a turbulent flow regime of an air-fuel mixture located in the closed combustion chamber 15 and to purge the open combustion chamber 15 with fresh air after the setting process.
  • the motor 17 is mounted on the combustion chamber rear wall 30, which acts as a closure for the axially displaceable combustion chamber sleeve 28.
  • a trigger switch 19 is arranged on a handle 18 of the setting device 10, via which an ignition device 25 with a arranged in the combustion chamber 15 ignition means 26, such. B. a spark plug, can be triggered when the setting tool 10 has been pressed against a workpiece.
  • the ignition means 26 is arranged at the first end 31 of the combustion chamber 15 and thus lies in the flow direction S of a generated by the fan 16 flow.
  • a pressure switch 24 is further arranged, which generates a switching signal when the setting device 10 is pressed with its mouth 27 to a workpiece (not shown in the figures).
  • the setting device 10 can be operated with a fuel gas or with a vaporizable liquid fuel, which in a fuel reservoir 20, such as. B. a fuel can, is provided.
  • the fuel reservoir 20 is connected via a fuel line 22 to a fuel inlet 23 in the combustion chamber 15.
  • the fuel inlet 23 is arranged at the first end 31 of the combustion chamber 15 and thus lies, as well as the ignition means 26, in the flow direction S of the flow which can be generated by the fan 16.
  • a metering device 21 such. B. a metering valve, interposed, the z. B. is then activated when the pressure switch 24 transmits a contact pressure.
  • the fan 16 has a direction of rotation 40.
  • the fuel inlet 23 and the ignition means 26 are based on the combustion chamber axis A on radials R1, R2, which are at an angle [alpha] to each other.
  • the angle [alpha] is between 5 ° and 180 °, preferably between 30 ° and 120 °. The angle is matched to the speed of the fan and the injection direction of the fuel inlet 23. In the illustrated embodiment, the angle [alpha] is 80 °.
  • the ignition means 26 lies in the direction of rotation 40 behind the fuel inlet 23rd

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (3)

  1. Outil de scellement entraîné par combustion (10) destiné à enfoncer des éléments de fixation, comportant :
    un piston d'enfoncement (14) guidé de manière mobile dans un cylindre de guidage (13),
    une chambre de combustion (15) définissant un axe de chambre de combustion (A), laquelle chambre de combustion comporte une première extrémité (31) adjacente au cylindre de guidage (13) et une seconde extrémité (32) espacée du cylindre de guidage (13),
    une entrée de combustible (23) débouchant dans la chambre de combustion (15) pour introduire du combustible dans la chambre de combustion (15),
    un élément d'allumage (26) pour allumer le combustible dans la chambre de combustion (15),
    et un ventilateur (16) pouvant être entraîné par un moteur (17), lequel ventilateur est supporté sur une paroi arrière (30) sur la seconde extrémité (32) de la chambre de combustion (15),
    caractérisé en ce que l'entrée de combustible (23) et l'élément d'allumage (26) sont tous les deux agencés sur la première extrémité (31) de la chambre de combustion (15).
  2. Outil de scellement selon la revendication 1, caractérisé en ce que l'entrée de combustible (23) et l'élément d'allumage (26) se situent sur des rayons (R1, R2) par rapport à l'axe de chambre de combustion (A) qui sont à un angle ([alpha]) l'un par rapport à l'autre, lequel angle est compris entre 5° et 180°.
  3. Outil de scellement selon la revendication 1 ou 2, caractérisé en ce que le ventilateur (16) peut être entraîné dans un sens de rotation (40), et en ce que l'élément d'allumage (26) se situe derrière l'entrée de combustible (23) dans le sens de rotation (40).
EP09100019A 2008-01-29 2009-01-07 Outil d'entraînement à combustion de gaz Not-in-force EP2085189B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09100019T PL2085189T3 (pl) 2008-01-29 2009-01-07 Napędzany spalinowo przyrząd do osadzania

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008000167A DE102008000167A1 (de) 2008-01-29 2008-01-29 Brennkraftbetriebenes Setzgerät

Publications (3)

Publication Number Publication Date
EP2085189A2 EP2085189A2 (fr) 2009-08-05
EP2085189A3 EP2085189A3 (fr) 2010-06-23
EP2085189B1 true EP2085189B1 (fr) 2011-06-08

Family

ID=40627172

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09100019A Not-in-force EP2085189B1 (fr) 2008-01-29 2009-01-07 Outil d'entraînement à combustion de gaz

Country Status (8)

Country Link
US (1) US9676089B2 (fr)
EP (1) EP2085189B1 (fr)
JP (1) JP5466856B2 (fr)
CN (1) CN101497187B (fr)
AT (1) ATE511956T1 (fr)
DE (1) DE102008000167A1 (fr)
ES (1) ES2364021T3 (fr)
PL (1) PL2085189T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11338422B2 (en) * 2018-01-19 2022-05-24 Max Co., Ltd. Driving tool

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN157475B (fr) * 1981-01-22 1986-04-05 Signode Corp
US4773581A (en) * 1986-06-13 1988-09-27 Hitachi Koki Company, Ltd. Combustion gas powered tool
US4721240A (en) * 1986-07-02 1988-01-26 Senco Products, Inc. Cam-controlled self-contained internal combustion fastener driving tool
US4712379A (en) * 1987-01-08 1987-12-15 Pow-R Tools Corporation Manual recycler for detonating impact tool
DE69005786T2 (de) * 1989-10-27 1994-04-28 Hitachi Koki Kk Mit Verbrennungsgas betriebenes Eintreibwerkzeug für Befestigungsmittel.
US5199626A (en) * 1990-10-05 1993-04-06 Hitachi Koki Company Limited Combustion gas powered tool
US6123241A (en) * 1995-05-23 2000-09-26 Applied Tool Development Corporation Internal combustion powered tool
US5752643A (en) * 1995-05-23 1998-05-19 Applied Tool Development Corporation Internal combustion powered tool
US5680980A (en) * 1995-11-27 1997-10-28 Illinois Tool Works Inc. Fuel injection system for combustion-powered tool
US6260519B1 (en) * 1997-12-31 2001-07-17 Porter-Cable Corporation Internal combustion fastener driving tool accelerator plate
DE19950352C2 (de) * 1999-10-19 2002-03-07 Hilti Ag Tragbares, brennkraftbetriebenes Arbeitsgerät und Verfahren zum Antrieb seines Kolbens
FR2832344B1 (fr) * 2001-11-21 2004-01-23 Spit Soc Prospect Inv Techn Appareil de fixation a piston propulse par gaz comprime
CN1273270C (zh) * 2002-08-09 2006-09-06 日立工机株式会社 以燃气为动力的射钉枪
US6755159B1 (en) * 2003-01-20 2004-06-29 Illinois Tool Works Inc. Valve mechanisms for elongated combustion chambers
US6863045B2 (en) * 2003-05-23 2005-03-08 Illinois Tool Works Inc. Combustion apparatus having improved airflow
JP4147403B2 (ja) * 2003-07-31 2008-09-10 マックス株式会社 ガス燃焼式衝撃工具の燃焼室構造
JP4395841B2 (ja) * 2004-09-29 2010-01-13 日立工機株式会社 燃焼式打込み工具
JP4446287B2 (ja) 2005-02-18 2010-04-07 日立工機株式会社 燃焼式釘打機
EP1899114A4 (fr) * 2005-06-29 2009-11-04 Poly Systems Pty Ltd Outil mecanique portatif
DE102006000179A1 (de) * 2006-04-13 2007-10-18 Hilti Ag Brennkraftbetriebenes Setzgerät

Also Published As

Publication number Publication date
CN101497187B (zh) 2012-12-12
PL2085189T3 (pl) 2011-11-30
ATE511956T1 (de) 2011-06-15
EP2085189A2 (fr) 2009-08-05
DE102008000167A1 (de) 2009-07-30
CN101497187A (zh) 2009-08-05
US9676089B2 (en) 2017-06-13
EP2085189A3 (fr) 2010-06-23
JP5466856B2 (ja) 2014-04-09
ES2364021T3 (es) 2011-08-23
JP2009178840A (ja) 2009-08-13
US20090188962A1 (en) 2009-07-30

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