EP3393713A1 - Outil d'enfoncement actionné par la pression d'une combustion - Google Patents

Outil d'enfoncement actionné par la pression d'une combustion

Info

Publication number
EP3393713A1
EP3393713A1 EP16819064.3A EP16819064A EP3393713A1 EP 3393713 A1 EP3393713 A1 EP 3393713A1 EP 16819064 A EP16819064 A EP 16819064A EP 3393713 A1 EP3393713 A1 EP 3393713A1
Authority
EP
European Patent Office
Prior art keywords
piston
seal
driving
combustion chamber
tacker
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Withdrawn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
EP16819064.3A
Other languages
German (de)
English (en)
Inventor
Tilo Dittrich
Norbert Heeb
Peter Bruggmueller
Dominik Schmidt
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 EP3393713A1 publication Critical patent/EP3393713A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil
    • B25C1/143—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil trigger operated
    • 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
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/18—Details and accessories, e.g. splinter guards, spall minimisers
    • B25C1/182—Feeding devices
    • B25C1/184—Feeding devices for nails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/181—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings for plastic packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
    • F16J15/3212—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings with metal springs
    • 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
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/047—Mechanical details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
    • F16J15/28—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of metal

Definitions

  • the invention relates to a tacker, in particular a hand-held tacker, according to the preamble of claim 1.
  • EP 1 987 924 A1 describes a rechargeable tacker in which a driving piston is guided by means of a first, radially projecting seal on an outer cylinder wall.
  • the drive piston also has a cylindrical projection, with which it engages in a hollow cylinder outlet of a combustion chamber which is tapered relative to the cylinder.
  • a second, radially projecting seal is arranged, which bears against an inner wall of the outlet in the radial direction.
  • an overpressure of the fuel gas mixture in the context of the invention, an increased pressure to increase the driving energy is understood.
  • the pressure of the fuel gas mixture is usually slightly above an ambient pressure, since the pressurized fuel gas to the below atmospheric pressure is added to stationary air in the combustion chamber. This is only a slight increase in pressure.
  • An overpressure according to the invention is preferably at least 100 mbar, more preferably at least 200 mbar above atmospheric pressure.
  • an axial loading of the second seal is understood to be a force acting on the seal by a sealing surface whose axial force component directed parallel to the piston axis is at least equal to or greater than a force component directed perpendicularly to the piston axis.
  • the axial force component is at least twice as large, more preferably at least three times as large as the radial component.
  • the second seal is made of a polymer, preferably an elastomer.
  • a preferred elastomer may be, for example, a natural rubber, a silicone rubber, a fluororubber or other fluorinated elastomer.
  • Such seals have a high sealing effect with good tolerance to contamination or aging of the sealing surfaces.
  • the driving piston is held in the starting position by means of a piston holder.
  • the piston holder exerts a defined minimum holding force in the direction of the piston axis on the drive piston. This leads to a defined pressing of the seal with controlled axial pressure force.
  • the reliable seal is therefore primarily determined by the forces of the piston holder and the combustion chamber overpressure. An age-related material condition of the seal has at most a subordinate influence on the seal.
  • the piston holder comprises a magnetic holding member.
  • Such holding members achieve high holding forces and are hardly subject to mechanical wear.
  • the holding member may be based solely on permanent magnets.
  • An abutment damping by the second seal in return of the driving piston is particularly advantageous in this case since permanent magnets are generally impact-sensitive.
  • an arrangement with electromagnets may be provided.
  • the second seal on a combustion chamber side abut against a resilient diaphragm.
  • Such a panel can easily reduce the force applied to the seal by its elasticity. This allows, for example, an arbitrarily large axial holding force of Eintreibkolbens without the seal is overstressed.
  • the resilient diaphragm can form an additional stop buffer for the returned drive piston in order to further reduce occurring shock waves.
  • the second seal is received stationary relative to the combustion chamber.
  • Such an arrangement allows a particularly good shading of the seal against hot fuel gases, so that the thermal and chemical stability of the seal used is less critical.
  • the second seal is received stationary relative to the drive piston. This allows easy maintenance access to the seal.
  • a tacker according to the invention can generally also have a plurality of axially loaded seals. It can be provided both stationary to the drive piston as well as stationary to the combustion chamber, a seal.
  • Fig. 1 shows a schematic sectional view of a Eintreibuzes invention of a first embodiment of the invention.
  • FIG. 2 shows a detailed view of the tacker of FIG. 1 prior to the triggering of a
  • Fig. 3 shows the tacker of Fig. 2 during a driving operation.
  • Fig. 4 shows a detailed view of a tacker according to a second
  • the tacker of Fig. 1 is a hand-held device comprising a housing 1 and a combustion chamber 2 received therein with a combustion chamber wall. Adjacent to the combustion chamber 2 is a cylinder 3 with a guided therein driving piston 4.
  • the driving piston 4 comprises a driving ram 5 for driving a nail member (not shown) into a workpiece.
  • an ignitable fuel gas mixture is introduced into the combustion chamber 2 by means of a fuel gas reservoir 6 and in particular a fresh air inlet (not shown).
  • the fuel gas mixture is compressed by means of a charging member 7 to an overpressure.
  • the charging member is formed, for example, as an electrically driven and supplied via a battery 8 compressor, which is arranged as an integral part of the tacker within the housing 1.
  • the charging member is a device separated from the tacker.
  • charging may also take place by means of a provision of the driving piston 4 driven in particular by combustion, or in some other way.
  • the fuel gas is introduced via a metering valve 9 from the fuel gas storage 6 into the air of the combustion chamber 2.
  • the fuel gas injection can take place in the not yet compressed, partially compressed or completely compressed air.
  • the driving piston 4 is held by a piston holder in the form of a magnet holder 10 against the overpressure in the combustion chamber.
  • a manually operated trigger 1 1 an ignition of the fuel gas mixture, for example via a spark plug, so that the driving piston 4 is driven and via the drive ram 5, the nail member (not shown) from a magazine 12 drives into the workpiece.
  • the exhaust gases of the ignited and expanded fuel gas may enter the outer space via outlet openings 13 towards the end of the travel of the drive piston.
  • a first seal 14 is provided on the driving piston 4, which is supported radially to a piston axis A of the driving piston against the inner wall of the cylinder 3.
  • This first seal 14 can for Example of a metal or a hard, thermally and mechanically high-strength plastic such as torion (polyamide imide) exist.
  • torion polyamide imide
  • a second seal 15 between the drive piston 4 and an outlet opening 16 of the combustion chamber 2 is provided.
  • the second seal 15 is preferably formed as an O-ring made of an elastomer and is loaded in the axial direction with respect to the piston axis A of the driving piston 4.
  • the second seal 4 is received at a bottom of the driving piston 4, for example in an annular groove.
  • a bottom surface of the driving piston 4 opposite sealing surface for the second seal 15 is presently formed by a diaphragm 16 which forms an outlet opening 17 of the combustion chamber 2.
  • the outlet opening 17 has a smaller diameter than the cylinder 3, and the second seal 15 has a smaller diameter than the first seal 14th
  • the diaphragm 16 is formed from a defined resilient sheet, which is firmly connected to a continuation of the combustion chamber wall.
  • permanent magnets 10 are arranged, which form the piston holder for the driving piston in the form of a magnetic holder.
  • the combustion chamber can be acted upon by an overpressure, wherein a reliable seal against the outer space is given by the second seal 15.
  • an arbitrarily long time can pass between the charging and the ignition, in which an operator optimizes the tacking device in its position or waits for other reasons.
  • the driving piston is accelerated in the direction of the nail member (see Fig. 3).
  • the expanding fuel gas is sealed only via the first seal 14 from the outside.
  • the second seal 15 is moved with the driving piston, since it is arranged stationary on this. This allows easy maintenance of the seal after removal of the drive piston. Under certain circumstances, the energy which can be achieved and thus the driving energy is increased by the retention of the driving piston.
  • the second seal 15 is in contrast to the first embodiment fixed to the cylinder side of the aperture 16. This has, inter alia, the advantage that the seal is exposed to the hot fuel gas flow less.

Landscapes

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

Abstract

L'invention concerne un outil d'enfoncement, comprenant un piston d'enfoncement (4) guidé dans un cylindre (3) et servant à enfoncer un élément de type clou dans une pièce, ainsi qu'une chambre de combustion (2) agencée sur le piston d'enfoncement (4) et pouvant être remplie d'un mélange de gaz combustible explosif, une surpression du mélange de gaz combustible pouvant être établie dans la chambre de combustion (2) par l'intermédiaire d'un organe de suralimentation (7). Un premier élément d'étanchéité (14) assure l'étanchéité du piston d'enfoncement (4) contre une paroi intérieure du cylindre (3) pendant un mouvement d'enfoncement, et l'étanchéité du piston d'enfoncement dans une position initiale est assurée vis-à-vis de la chambre de combustion (2) au moyen d'un deuxième élément d'étanchéité (15) sollicité axialement par rapport à un axe (A) du piston.
EP16819064.3A 2015-12-22 2016-12-20 Outil d'enfoncement actionné par la pression d'une combustion Withdrawn EP3393713A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15201884.2A EP3184250A1 (fr) 2015-12-22 2015-12-22 Cloueur entraine par combustible
PCT/EP2016/081859 WO2017108750A1 (fr) 2015-12-22 2016-12-20 Outil d'enfoncement actionné par la pression d'une combustion

Publications (1)

Publication Number Publication Date
EP3393713A1 true EP3393713A1 (fr) 2018-10-31

Family

ID=54936907

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15201884.2A Withdrawn EP3184250A1 (fr) 2015-12-22 2015-12-22 Cloueur entraine par combustible
EP16819064.3A Withdrawn EP3393713A1 (fr) 2015-12-22 2016-12-20 Outil d'enfoncement actionné par la pression d'une combustion

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP15201884.2A Withdrawn EP3184250A1 (fr) 2015-12-22 2015-12-22 Cloueur entraine par combustible

Country Status (4)

Country Link
US (1) US20180370006A1 (fr)
EP (2) EP3184250A1 (fr)
TW (1) TWI629146B (fr)
WO (1) WO2017108750A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11819989B2 (en) 2020-07-07 2023-11-21 Techtronic Cordless Gp Powered fastener driver
CA3167425A1 (fr) 2021-07-16 2023-01-16 Techtronic Cordless Gp Pose-attaches electrique

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6685193B2 (en) * 2001-08-30 2004-02-03 Illinois Tool Works Inc. Self lubricating, non-sealing piston ring for an internal combustion fastener driving tool
DE10158626B4 (de) * 2001-11-29 2006-07-13 Hilti Ag Tragbares, brennkraftbetriebenes Arbeitsgerät und Verfahren zu seiner Betriebssteuerung
JP3948351B2 (ja) * 2002-06-05 2007-07-25 マックス株式会社 圧縮空気駆動釘打機のピストンストップ機構
DE10253670B4 (de) * 2002-11-19 2021-05-06 Hilti Aktiengesellschaft Brennkraftbetriebenes Setzgerät
DE10318554B4 (de) * 2003-04-24 2005-03-24 Hilti Ag Brennkraftbetriebenes Setzgerät
JP4144472B2 (ja) * 2003-08-11 2008-09-03 日立工機株式会社 燃焼式動力工具
EP1704022A1 (fr) * 2003-12-30 2006-09-27 Poly Systems Pty Limited Outil d'entrainement de dispositif d'attache
US7673779B2 (en) * 2004-02-09 2010-03-09 Illinois Tool Works Inc. Combustion chamber distance control combustion-powered fastener-driving tool
JP2005319549A (ja) * 2004-05-10 2005-11-17 Hitachi Koki Co Ltd 燃焼式釘打機
US20050279802A1 (en) * 2004-06-14 2005-12-22 Moeller Larry M Seal for portable fastener driving tool
JP4930672B2 (ja) * 2005-08-09 2012-05-16 マックス株式会社 ガス燃焼式打込み工具のファスナー送り機構
JP2007222989A (ja) 2006-02-23 2007-09-06 Max Co Ltd ガスネイラにおける打撃ピストン保持構造
JP5516185B2 (ja) * 2010-07-26 2014-06-11 マックス株式会社 ガス燃焼式打ち込み工具
JP5370302B2 (ja) * 2010-07-26 2013-12-18 マックス株式会社 流体の供給制御装置及びガス燃焼式釘打機におけるガス燃料の供給制御装置
JP5447285B2 (ja) * 2010-08-12 2014-03-19 マックス株式会社 ガス燃焼式打ち込み工具
US8079504B1 (en) * 2010-11-04 2011-12-20 Tricord Solutions, Inc. Fastener driving apparatus
US8800834B2 (en) * 2011-05-11 2014-08-12 Tricord Solutions, Inc. Fastener driving apparatus
TWI529039B (zh) * 2013-04-25 2016-04-11 Cylinder module for gas nail gun

Also Published As

Publication number Publication date
TW201722647A (zh) 2017-07-01
EP3184250A1 (fr) 2017-06-28
WO2017108750A1 (fr) 2017-06-29
US20180370006A1 (en) 2018-12-27
TWI629146B (zh) 2018-07-11

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