EP2457697A2 - Appareil d'enfoncement - Google Patents

Appareil d'enfoncement Download PDF

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Publication number
EP2457697A2
EP2457697A2 EP11186746A EP11186746A EP2457697A2 EP 2457697 A2 EP2457697 A2 EP 2457697A2 EP 11186746 A EP11186746 A EP 11186746A EP 11186746 A EP11186746 A EP 11186746A EP 2457697 A2 EP2457697 A2 EP 2457697A2
Authority
EP
European Patent Office
Prior art keywords
fuel
combustion chamber
displacement member
tacker according
metering
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.)
Withdrawn
Application number
EP11186746A
Other languages
German (de)
English (en)
Other versions
EP2457697A3 (fr
Inventor
Tilo Dittrich
Thomas Sperrfechter
Peter Stauss
Norbert Heeb
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 EP2457697A2 publication Critical patent/EP2457697A2/fr
Publication of EP2457697A3 publication Critical patent/EP2457697A3/fr
Withdrawn legal-status Critical Current

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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 invention relates to a tacker, in particular a hand-held tacker, according to the preamble of claim 1.
  • DE 102 60 703 A1 describes a liquid gas driven driving tool having a metering chamber with an adjustable metering volume.
  • the metering volume can be changed by an electromotive drive, and a discharge of liquid gas into a combustion chamber is initiated by a pneumatic drive by means of compressed air.
  • the displacement member may be formed, for example, as a linearly displaceable reciprocating piston, which is guided in a cylinder at least partially forming the metering volume.
  • the fuel would be displaced directly from the metering volume by the displacement member.
  • the metering volume itself can be made changeable, for example, as a collapsible bellows or as a volume with an elastic wall.
  • the displacement member may be embodied, for example, as an actuating punch that deforms the metering volume.
  • the elastic wall itself forms the displacement member, in particular by means of pressurization of the opposite side of the metering volume.
  • the metering of the fuel takes place predominantly or exclusively in the liquid phase, as a result of which the amount of fuel spent in the combustion chamber is defined particularly precisely.
  • such exclusive metering of liquid phase can be ensured, for example, by arranging a membrane in the fuel tank, wherein the liquid gas is held in the liquid phase only in the membrane and an inert gas outside the membrane, for example defined overpressure is provided.
  • the liquid gas In the course of the consumption of the fuel expands while the intergas and keeps due to its overpressure, the liquid gas at any time in the liquid phase.
  • Such a per se known configuration of a fuel tank is basically accompanied in practice with a certain change in the pressure in the fuel tank in the course of its emptying.
  • a drive of the displacement member comprises a rechargeable mechanical energy storage, wherein the charging of the energy storage takes place by the pressure of the fuel.
  • the mechanical energy store may comprise a mechanical spring, a gas spring or a magnetic spring.
  • the ejection can be initiated by simply opening a valve.
  • the mechanical energy store can also have an additional holding device by means of which it can be triggered.
  • the displacement member is directly via a pressure of the fuel, preferably via a connection with the tank, driven.
  • a mechanically simple drive of the displacement member is provided.
  • ejection of the fuel from the metering volume can be done easily by opening a valve.
  • the displacer can be held in a starting position by force, preferably, but not necessarily, by means of a spring.
  • force preferably, but not necessarily, by means of a spring.
  • the metering device comprises at least one valve member, wherein the valve member is particularly preferably operated electrically.
  • the dosing volume of the combustion chamber can be shut off by the valve member, wherein, for example, by opening this barrier the expulsion of the fuel can be initiated.
  • valve member in the interest of a simple and effective implementation as a three-way valve, in particular with two switching positions, be formed. Overall, this allows a simple and reliable control of the metering device. Further advantageously, the two switching positions of the three-way valve can be configured as bistable positions, whereby a particularly low consumption of electrical energy for the valve member is made possible.
  • the defined amount of fuel can be adjusted adjustable, for example by means of a variable stop of the displacer.
  • a variable stop of the displacer As a result, it is possible to respond specifically to changing boundary conditions such as the ambient temperature.
  • the defined amount of fuel can be increased in order to provide an ignitable mixture sufficiently quickly even with slowed evaporation of the liquefied gas in the combustion chamber.
  • the stop can, depending on requirements for example by means of a thermomechanical element, for example bimetallic element or expansion element, are adjusted or by means of an electric adjusting drive, preferably a stepper motor.
  • a characteristic curve of the defined quantity of fuel has a substantially bilinear course as a function of an ambient temperature.
  • the line 3 connects a metering device 4 with the combustion chamber 2, wherein the metering device 4 in turn is connected to the fuel tank 5 arranged in or on the housing 1.
  • the fuel tank can be designed in particular as a replaceable cartridge.
  • the tacker also includes an electronic control 6 with an electric accumulator as energy storage. Via the electronic control 6, a spark plug 7 in the combustion chamber 2 is controlled and optionally the metering device 4, provided that it has electrical valves or other electrically controlled components.
  • a magazine 8 for storing fasteners, such as nails is arranged in a front portion of the tacker.
  • a pressing member 9 can be pressed against a workpiece to release a triggering of the tacker.
  • Fig. 2 shows a first embodiment of the metering device 4.
  • the metering device 4 comprises a metering volume 12, which is connected via a 3-way valve with two switching positions 18 on the one hand via a supply line 18a to the fuel tank 5 and on the other hand via a supply line 18b to the combustion chamber 2.
  • a valve spool 19 is disposed in a spool chamber which is part of the dosing volume 12.
  • a third supply line 18c connects the slide chamber 12 with a cylindrical space 17, in which a displacement member 16 is guided in the form of a reciprocating piston.
  • the space 17 forms a further part of the metering volume 12, wherein retraction of the displacer 16 into the space 17 can expel the fuel therein.
  • Fig. 2 shows the displacer 16 in maximum retracted into the cylinder 17 position.
  • the valve spool 19 is electrically operated and can assume two defined positions. In the first, in Fig. 2 shown position, the supply line 18a is closed and the supply line 18b open. In the other position, not shown, the supply line 18a is opened and the supply line 18b is closed.
  • the connection 18c between the spool chamber and the cylinder 17 is permanently open.
  • the positions of the valve slide 19 can each be stable positions (bistable valve slide), so that only a short, low-energy-requiring electrical pulse is required to switch over the valve.
  • the valve spool 19 is always arranged in a current-free rest position under closure of the connection 18b with the combustion chamber 2 (monostable valve spool). By applying an electrical voltage, the valve spool is in the opposite position (see Fig. 2 ), in which it closes the connection 18a with the fuel tank 5.
  • the reciprocating piston or the displacement member 16 is subjected to a force in the ejection direction by means of a spring 21, in the present case a helical spring.
  • the path of the reciprocating piston 16 is limited by an adjustable stop 15.
  • the stop 15 is designed as a linearly adjustable pin, which may be connected, for example, with a thermo-mechanical element or an electrical adjusting device.
  • the stopper 15, for example further protrude at higher ambient temperatures and thus reduce the possible stroke of the reciprocating piston 16, however, increase at low temperatures. In this way, a defined amount of the fuel, which is determined by the stroke of the displacement member 16 in the cylinder 17, are selectively changed.
  • the reciprocating piston 16 is slidably guided in a seal 16a so that its end facing the spring 21 is at ambient pressure, the seal 16a forming a barrier between the liquefied petroleum gas and the environment.
  • a sliding seal it is also possible to choose another type of seal, for example via a closed bellows.
  • the metering device according to Fig. 2 works like this:
  • valve member 18 is moved by means of the controller 6 in the position, not shown, in which the slide chamber 12 is connected to the fuel tank and the combustion chamber is separated from the dosing volume 12.
  • liquid gas in the liquid phase can flow into the metering volume 12 set with the stop 15.
  • the liquefied gas in the tank 5 is present exclusively in the liquid phase. This is achieved in a manner known per se by enclosing the liquefied gas in the tank in a membrane and filling the space outside the membrane with an inert gas at a pressure higher than the vapor pressure of the liquefied gas. Because of this Overpressure is no evaporation process in the course of the flow of liquid gas into the metering volume 12, so that there is essentially no change in temperature in the course of the influx of the liquefied gas.
  • the incoming liquid gas pushes the reciprocating piston 16 up to the stop 15 against the force of the spring 21 upwards (in the illustration Fig. 2 ) or out of the cylinder 17, wherein it fills the vacant part of the cylinder 17 as dosing volume 12.
  • the metering device In this upper position, the metering device is ready to discharge the fuel into the combustion chamber.
  • the spring 21 is stretched, wherein it caches mechanical energy, which was taken in the course of the movement of the reciprocating piston 17 the pressurized fuel tank.
  • the valve spool 19 is changed over by means of the controller 6.
  • the supply line 18a are closed and the supply line 18b is opened (see position in FIG Fig. 2 ).
  • the liquefied gas flows into the combustion chamber 2, being driven by its own vapor pressure by the spring force of the spring 21, which pushes the displacement member 16 down quickly into the cylinder 17 filled with liquefied gas.
  • the metered into the combustion chamber 2 amount of liquid depending on the setting of the stopper 15 at low temperatures is greater, so that even with a slower evaporation and / or a higher oxygen concentration in the combustion chamber, a reasonably fast provision of an ignitable mixture in the combustion chamber 2 ,
  • the LPG-air mixture can be ignited in a known manner in the combustion chamber.
  • FIG. 3 and FIG. 4 show a second embodiment of the invention.
  • An essential difference from the preceding embodiment is that the liquefied gas from the metering volume 12 is not discharged by means of a rechargeable energy store (spring 21), but directly by the pressure of the fuel.
  • the displacement member 16 is formed as a linearly displaceable piston, which is located in a cylinder 17, which is part of the metering volume 12 is.
  • the cylinder 17 connects to a fixed volume 12, which is connected in each case shut-off via discrete valve members 13, 14 to the fuel tank 5 and to the combustion chamber 2.
  • the valve 13 In the ready position after Fig. 3 the valve 13 is open for connection to the fuel tank and the valve 14 for connection to the combustion chamber is closed.
  • a branch pipe 20 leads to an end of the cylinder 17 opposite to the valve members 13, 14.
  • the branch pipe 20 connects an upper end of the piston-shaped displacer 16 to the fuel tank 5.
  • an adjusting mechanism 15a is also arranged, by means of which the upper stop 15 is adjustable for the displacement member 16 in particular depending on the temperature, the air pressure, the gas pressure and / or the Gasdosenyogllstand.
  • the piston 16 is also biased by a spring (not shown) in the direction of the force FV in its upper stop position, which is indicated by the upward arrow in Fig. 3 is symbolized.
  • a spring (not shown) in the direction of the force FV in its upper stop position, which is indicated by the upward arrow in Fig. 3 is symbolized.
  • the spring force is used only for a defined positioning of the piston 16 in a starting position. Accordingly, the force of the positioning spring can be made relatively small.
  • a triggering operation of the tacker is now carried out by switching the valves 13, 14 in the opposite position.
  • the cylinder 17 is acted upon via the line 20 with the pressure in the fuel tank 5.
  • the piston 16 is accelerated according to the drawings down or in the direction of the fixed volume 12, wherein he presses the liquid gas from the lower part of the cylinder 17 into the combustion chamber 2.
  • the piston 16 has assumed a lower stop position, which in Fig. 4 is shown. According to this sequence, the drive of the displacer 16 takes place directly above the pressure of the fuel in the tank 5.
  • FIG. 3 and FIG. 4 in each case those volume areas in which liquid gas is in equilibrium in the liquid phase or under high pressure, represented by a hatching.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP11186746.1A 2010-11-25 2011-10-26 Appareil d'enfoncement Withdrawn EP2457697A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010061942A DE102010061942A1 (de) 2010-11-25 2010-11-25 Eintreibgerät

Publications (2)

Publication Number Publication Date
EP2457697A2 true EP2457697A2 (fr) 2012-05-30
EP2457697A3 EP2457697A3 (fr) 2015-10-07

Family

ID=45065662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11186746.1A Withdrawn EP2457697A3 (fr) 2010-11-25 2011-10-26 Appareil d'enfoncement

Country Status (5)

Country Link
US (1) US20120132689A1 (fr)
EP (1) EP2457697A3 (fr)
JP (1) JP5926036B2 (fr)
CA (1) CA2758489A1 (fr)
DE (1) DE102010061942A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU170967U1 (ru) * 2016-03-21 2017-05-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Комсомольский-на-Амуре государственный технический университет" (ФГБОУ ВО "КнАГТУ") Гайковерт ударного действия для страгивания болтов и гаек при заедании
EP3581337A1 (fr) * 2018-06-11 2019-12-18 HILTI Aktiengesellschaft Machine-outil portative
EP3593951A1 (fr) * 2018-07-11 2020-01-15 Hilti Aktiengesellschaft Machine-outil portative

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10260703A1 (de) 2002-12-23 2004-07-01 Hilti Ag Brennkraftbetriebenes Setzgerät

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT305922B (de) * 1969-02-18 1973-03-26 Gkn Screws Fasteners Ltd Kraftbetätigtes Werkzeug
FR2463267A1 (fr) * 1979-08-08 1981-02-20 Liesse Maurice Generateur thermique d'impulsions
US4365471A (en) * 1979-11-05 1982-12-28 Adams Joseph S Compression wave former
US4404894A (en) * 1980-08-27 1983-09-20 Hilti Aktiengesellschaft Valve trigger assembly for pneumatic nailer
DE3502977A1 (de) * 1985-01-30 1986-07-31 Robert Bosch Gmbh, 7000 Stuttgart Druckmittelbetriebenes schlaggeraet
JPS62155279U (fr) * 1986-03-26 1987-10-02
US4717060A (en) * 1986-07-02 1988-01-05 Senco Products, Inc. Self-contained internal combustion fastener driving tool
FR2774934B1 (fr) * 1998-02-13 2000-03-31 Spit Soc Prospect Inv Techn Appareil de fixation a gaz comprime
US6328002B1 (en) * 1999-05-06 2001-12-11 Sandia Corporation Misfire tolerant combustion-powered actuation
JP2001317465A (ja) * 2000-05-11 2001-11-16 Wako Resource:Kk 間欠的液体吐出装置
US6655570B2 (en) * 2001-05-04 2003-12-02 Illinois Tool Works Inc. Constant volume valve for a combustion powered tool
US6874452B2 (en) * 2002-01-15 2005-04-05 Joseph S. Adams Resonant combustion chamber and recycler for linear motors
US6634325B1 (en) * 2002-05-03 2003-10-21 Joseph S. Adams Fuel injection system for linear engines
DE10222338A1 (de) * 2002-05-21 2003-12-04 Hilti Ag Brennkraftbetriebenes Setzgerät
US6912988B2 (en) * 2003-01-24 2005-07-05 Joseph S. Adams Multiple-front combustion chamber system with a fuel/air management system
DE10318554B4 (de) * 2003-04-24 2005-03-24 Hilti Ag Brennkraftbetriebenes Setzgerät
US6722550B1 (en) * 2003-05-09 2004-04-20 Illinois Tool Works Inc. Fuel level indicator for combustion tools
DE10326473B3 (de) * 2003-06-12 2004-12-16 Hilti Ag Brennkraftbetriebenes Setzgerät
JP2005144608A (ja) * 2003-11-17 2005-06-09 Makita Corp 燃焼式作業工具
DE102005000134A1 (de) * 2005-10-05 2007-04-12 Hilti Ag Brennkraftbetriebenes Setzgerät
JP5067110B2 (ja) * 2007-10-17 2012-11-07 マックス株式会社 ガス燃焼式打込み工具
US8347832B2 (en) * 2008-10-31 2013-01-08 Illinois Tool Works Inc. Fuel supply and combustion chamber systems for fastener-driving tools

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10260703A1 (de) 2002-12-23 2004-07-01 Hilti Ag Brennkraftbetriebenes Setzgerät

Also Published As

Publication number Publication date
EP2457697A3 (fr) 2015-10-07
DE102010061942A1 (de) 2012-05-31
CA2758489A1 (fr) 2012-05-25
US20120132689A1 (en) 2012-05-31
JP2012111031A (ja) 2012-06-14
JP5926036B2 (ja) 2016-05-25

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