EP2463062A2 - Outil d'enfoncement - Google Patents

Outil d'enfoncement Download PDF

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Publication number
EP2463062A2
EP2463062A2 EP11189323A EP11189323A EP2463062A2 EP 2463062 A2 EP2463062 A2 EP 2463062A2 EP 11189323 A EP11189323 A EP 11189323A EP 11189323 A EP11189323 A EP 11189323A EP 2463062 A2 EP2463062 A2 EP 2463062A2
Authority
EP
European Patent Office
Prior art keywords
tacker
combustion chamber
fuel
evaporation member
evaporation
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Withdrawn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
EP11189323A
Other languages
German (de)
English (en)
Other versions
EP2463062A3 (fr
Inventor
Mario Grazioli
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
Publication of EP2463062A2 publication Critical patent/EP2463062A2/fr
Publication of EP2463062A3 publication Critical patent/EP2463062A3/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Withdrawn legal-status Critical Current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.
  • US 4,712,379 describes a liquefied petroleum gas driven tacker having a combustor for igniting a liquefied petroleum gas mixture, thereby propelling a piston with a driving ram adjacent thereto to drive a nail or the like into a workpiece.
  • a tank for storing the liquefied gas adjoins a valve member for metering the liquefied gas. From the valve member, the liquefied gas is fed via an injection line into the combustion chamber.
  • the LPG evaporates after dosing by the valve member in a sufficiently short time to ensure ergonomic and safe operation. This is especially true at unfavorably low ambient temperatures, for example during outdoor work in winter.
  • the fuel can be supplied in a controlled manner with an amount of energy from an electrical energy source in order to achieve a particularly rapid evaporation and / or thorough mixing of the fuel with the combustion air, in particular under unfavorable conditions.
  • a feeder of Fuel to the combustion chamber is, for example, a fuel line leading to the combustion chamber, to understand an opening of such a fuel line in the combustion chamber or the combustion chamber itself.
  • An electrical energy source for operating the electrical vaporization member may be provided to accomplish a number of tasks, including, but not limited to, the electronic ignition of the fuel-air mixture.
  • it is rechargeable batteries, as they are commonly used in hand-held tools.
  • the evaporation member comprises an electrical heating element.
  • the supply of heat energy via an electric heating element is a simple and direct way to accelerate the evaporation of the fuel.
  • the heating element comprises a PTC heater (Positive Temperature Coefficient).
  • PTC heater Platinum Temperature Coefficient
  • Such heating elements are self-regulating due to the rising temperature with the temperature, so that overheating, especially with the risk of unintentional ignition of the fuel, due to the design is excluded.
  • conventional heating elements with heating wires can be used.
  • the evaporation member comprises a means for generating mechanical vibrations.
  • it is a high frequency or ultrasonic generator.
  • a particularly rapid transfer of energy into the fuel for the purpose of its evaporation or mixing done.
  • a better evaporation or atomization of a vibrating surface of the evaporation member can take place.
  • the introduction of energy for atomization / vaporization into the fuel may be more effective by mechanical vibrations than by heat transfer.
  • a heating element and a means for generating mechanical vibrations may also be combined.
  • the tacker has a metering valve for metering the fuel, the vaporiser being spaced from the metering valve.
  • the evaporation member is thermally insulated from the metering valve, so that a metered in the metering amount of fuel is not corrupted.
  • the evaporation member is arranged hydraulically between the metering valve and the combustion chamber, so that the fuel can be metered in liquid and is then evaporated.
  • the evaporation member is disposed within the combustion chamber.
  • an injection of the fuel onto the evaporation member may be particularly preferably directed so that a particularly effective energy transfer to the preferably already partially atomized fuel takes place.
  • the evaporation element can be designed to be particularly compact and energy-saving.
  • the fuel may be passed through the evaporator.
  • the supply of fuel to the combustion chamber may be surrounded by a heating element.
  • the evaporation member is arranged directly in the injection region of the fuel, for example in the design of an antechamber during the injection. In this case, the fuel emerging from the injection line would first pass through the prechamber.
  • the entry of mechanical vibration energy and / or heat energy in the preferred already by exiting the injection line for example, from a nozzle, atomized fuel jet take place.
  • an evaporation member has means for enlarging its surface, which may preferably be ribs, nubs and / or openings. This allows a particularly effective transfer of energy from the evaporation member to the fuel.
  • the evaporation element is controllable via an electronic control unit, wherein in a preferred, but not necessary development, a temperature sensor is connected to the control unit.
  • a temperature sensor can, for example, provide the information necessary for correspondingly low outside temperatures and / or a low temperature of the combustion chamber in order to initiate an activation of the evaporation member via the control electronics.
  • a first temperature sensor is particularly advantageous, which determines a temperature in the region of the combustion chamber, and a second temperature sensor, which determines an ambient temperature.
  • a second temperature sensor which determines an ambient temperature.
  • an activation of the evaporation member takes place by means of an actuator, preferably via a handle switch and / or a pressure switch.
  • an actuator preferably via a handle switch and / or a pressure switch.
  • the evaporator if necessary, under the condition of other parameters such as an outside temperature, activated when the device is taken by a user in the hand, so that in the near future is an operation.
  • the pressure switch may be provided in a front region of the device and actuated by a pressing contact of the device with a workpiece. Such a pressure switch may already be provided to serve as a safety device against inadvertent actuation of the tacker.
  • the evaporation member can be activated directly via an actuation switch.
  • the immediate activation takes place without consideration of further parameters such as temperature or operating state.
  • Such a switch can save costs as the only way of activating the Evaporator be provided. For example, this could be dispensed with a control electronics in a simple design, with an ignition of the device can be done for example via a piezo igniter.
  • the switch can also be present in the manner of an override switch in addition to a control electronics.
  • a piston 1 is guided linearly movably in a cylinder 2 in a known manner, the cylinder 2 being connected as a continuation to a combustion chamber 3.
  • the piston 1 has in its advancing direction an adjacent driving tappet 4, by means of which a nail member or other fastening member (not shown) can be driven into a workpiece.
  • the tacker has in known manner a magazine for receiving the nail members, one or more actuation switches, and a tank for storing fuel or LPG (not shown in the present case).
  • the liquefied gas is fed into the combustion chamber 3 by means of a gas line 5, which is arranged downstream of a valve member for metering the fuel. There it flows in a defined direction into the combustion chamber.
  • a gas line 5 which is arranged downstream of a valve member for metering the fuel.
  • the substantially hollow cylindrical combustion chamber 3 flows through in the radial direction from one end to the other of the fuel jet 6, wherein the fuel jet 6 expands defined and meets an impact region 7 of the opposite wall of the combustion chamber.
  • an electrically operated, active evaporation element 8 in the form of a heating element is mounted on the wall of the combustion chamber.
  • the impact area 7 of the wall of the combustion chamber 3 can be heated so that the impacting on the impact area 7 fuel heat energy can absorb and accelerated in the combustion chamber 3 evaporates.
  • the heating element 8 is supplied via an electronic control unit 9 with electrical energy, which in turn is connected to a voltage source 10 in the form of an accumulator designed as an electrical energy storage.
  • the accumulator 10 will be provided regularly in the housing of the presently hand-held tacker, for example in the region of a handle part, in the region of a magazine for nail members or in any other area.
  • the electrical energy storage is designed as a lithium-ion battery to provide the smallest possible weight as large an amount of energy in the shortest possible time available, as it is advantageous for an ergonomic operation according to the invention active evaporating members of Eintreib marmaschinen.
  • the electrical energy storage is designed as an iron-phosphorus battery or as a sulfur oxide battery.
  • the control electronics 9 is connected to two temperature sensors 11, 12.
  • a first of the temperature sensors 11 is arranged on a wall of the combustion chamber 3, in this case on the wall of the cylinder 2, in order to measure a device temperature.
  • the temperature sensor 11 is arranged sufficiently spaced from the heating element so as not to be affected by its temperature.
  • the aim of the first temperature sensor 11 is to determine a general average heating of the combustion chamber 3, which is why the arrangement on the cylinder wall 2 at a relatively great distance from the heating element 8 is particularly favorable.
  • the second temperature sensor 12 is arranged on a suitable region of the housing of the tacker in order to measure an ambient temperature as uninfluenced by a device temperature.
  • the heating element in contrast to the embodiment according to Fig. 1 not arranged on the outer wall of the combustion chamber, but within the combustion chamber 3.
  • a guide of the electrical supply line of the heating element 8 in the combustion chamber 3 is required.
  • the impact area 7 is formed directly through the surface of the heating element 8 in this embodiment.
  • the heating element 8 may preferably have structures in the impact area 7 for enlarging its surface, for example ribs, nubs, perforations or the like.
  • the further control of the arranged within the combustion chamber 3 heating element is carried out as in the first embodiment.
  • a typical limit temperature at which the activation of the electrically operated evaporation element 8 is carried out is in the range of 0 ° C. Depending on the configuration of the combustion chamber and the fuel used, the temperature may also be above or below it. In principle, it is also possible to work at very low temperatures through the active evaporation member according to the invention, even at temperatures which are close to or below the boiling point of the fuel. In the design of the capacity of the electrical energy storage can be taken in this context on a preferred purpose of the device consideration.

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)
EP11189323A 2010-12-13 2011-11-16 Outil d'enfoncement Withdrawn EP2463062A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010062895A DE102010062895A1 (de) 2010-12-13 2010-12-13 Eintreibgerät

Publications (2)

Publication Number Publication Date
EP2463062A2 true EP2463062A2 (fr) 2012-06-13
EP2463062A3 EP2463062A3 (fr) 2013-02-27

Family

ID=45350639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11189323A Withdrawn EP2463062A3 (fr) 2010-12-13 2011-11-16 Outil d'enfoncement

Country Status (8)

Country Link
US (1) US20120312857A1 (fr)
EP (1) EP2463062A3 (fr)
JP (1) JP2012125915A (fr)
CN (1) CN102528751A (fr)
AU (1) AU2011253995A1 (fr)
CA (1) CA2759601A1 (fr)
DE (1) DE102010062895A1 (fr)
TW (1) TW201235164A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2875902A1 (fr) 2013-11-26 2015-05-27 HILTI Aktiengesellschaft Appareil de pose avec sonde de température

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712379A (en) 1987-01-08 1987-12-15 Pow-R Tools Corporation Manual recycler for detonating impact tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4822980A (en) * 1987-05-04 1989-04-18 Gte Products Corporation PTC heater device
US4913331A (en) * 1988-10-21 1990-04-03 Hitachi Koki Company, Ltd. Internal-combustion piston driving apparatus having a decompression channel
US7051686B2 (en) * 2001-02-28 2006-05-30 Illinios Tool Works Inc. Variable volume valve for a combustion powered tool
CA2383904C (fr) * 2001-05-04 2006-09-05 Illinois Tool Works Inc. Soupape a volume variable pour dispositif a combustion
US6782875B2 (en) * 2001-08-29 2004-08-31 Hitoshi Yoshimoto Systems and methods for conditioning or vaporizing fuel in a reciprocating internal combustion engine
DE102008000286A1 (de) * 2008-02-13 2009-08-20 Hilti Aktiengesellschaft Brennkraftbetriebenes Setzgerät
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
US4712379A (en) 1987-01-08 1987-12-15 Pow-R Tools Corporation Manual recycler for detonating impact tool

Also Published As

Publication number Publication date
TW201235164A (en) 2012-09-01
AU2011253995A1 (en) 2012-06-28
US20120312857A1 (en) 2012-12-13
CA2759601A1 (fr) 2012-06-13
JP2012125915A (ja) 2012-07-05
CN102528751A (zh) 2012-07-04
EP2463062A3 (fr) 2013-02-27
DE102010062895A1 (de) 2012-06-14

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