EP3074186A1 - Pyrotechnisches eintreibgerät - Google Patents
Pyrotechnisches eintreibgerätInfo
- Publication number
- EP3074186A1 EP3074186A1 EP14802653.7A EP14802653A EP3074186A1 EP 3074186 A1 EP3074186 A1 EP 3074186A1 EP 14802653 A EP14802653 A EP 14802653A EP 3074186 A1 EP3074186 A1 EP 3074186A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recess
- propellant charge
- combustion chamber
- central
- separating member
- 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
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
- 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
-
- 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
Definitions
- the invention relates to a tacker according to the preamble of claim 1.
- Hand-held driving devices with propellant charge are known from the prior art, in which after ignition of a pyrotechnic charge, the resulting fuel gases expand in a combustion chamber. As a result, a piston is accelerated as energy transfer means and drives a fastener into a workpiece. Basically, the most optimized, residue-free and reproducible burning of the charge is desired. It should be noted that the charge usually includes particles such as powder grains, fibers or the like, which are initially driven after ignition in front of a flame front ago.
- Combustion chamber is separated by means of a perforated disc in an upper part of the chamber and a lower chamber part.
- Powder grains of the propellant prior to combustion are larger than the holes of the disc.
- unburned powder grains are first accelerated in a central ejection area on the perforated portions of the cutting wheel, where they are retained due to the dimensioning of the holes of the cutting wheel, so that a combustion of the powder grains takes place predominantly in the upper part of the chamber.
- Fig. 10 a modification is shown in which a propellant charge without a cartridge is used.
- no design including the central axis enclosing discharge area in the upper part of the chamber is provided, which extends between the propellant charge and a central region of the cutting disc.
- Example of FIG. 10 is arranged annularly around a central punch of the combustion chamber.
- the ignition of the cartridge-free charge takes place at an upper end of the central punch.
- Breakthroughs come into contact.
- the particles can then be evenly distributed in the upper compartment while being captured by a flame front and also ignited.
- An energy transfer element according to the invention is any means that is acted upon by the ignition of the charge with kinetic energy, wherein the
- Motion energy is ultimately transferred to the fastener.
- the energy transmission element is designed as a particular rotationally symmetrical piston.
- recesses or other structures may be provided which further promote turbulence and uniform expansion of the fuel gases.
- any retractable anchoring such as nail, bolt or screw understood.
- An ejection region in the sense of the invention is a prismatic, mostly cylindrical spatial region whose cross-section is defined by a surface of the igniting charge directed into the combustion chamber and which extends perpendicular to the surface.
- the surface of the charge is defined herein as the exit surface of the opened cartridge.
- Ejection area substantially cylindrically shaped. Its diameter corresponds substantially to the inner diameter of the cartridge.
- a central axis in the sense of the invention runs as a center of gravity line through the
- Discharge area Regularly, but not necessarily, the central axis coincides with a
- An isolator in the context of the invention is any structure by which the combustion chamber is divided into two sub-chambers.
- the separating member extends transversely to the central axis. It can be designed, for example, as a multi-perforated disc.
- the central area of the partition member has a recess. Through this depression, a particularly good backscatter of the deflected particles and
- the central region of the separating member is preferably not pierced, so that at least a significant portion of the initially ejected particles within the
- the closed surface of the central area is larger than a sectional area of the
- the depression is shaped as a bowl-shaped
- an upstanding projection is formed in a central bottom portion of the recess.
- the projection may be conical, for example.
- the recess has a downwardly decreasing diameter, which also causes a good distribution of powder grains and fuel gases.
- a maximum diameter of the depression which is perpendicular to the central axis, is not less than 80% of a maximum diameter of an opening of the propellant charge, which is perpendicular to the axis.
- the diameter of the recess is greater than the diameter of the opening of the propellant charge.
- a maximum depth of the recess measured in the direction of the axis is not less than 30%, more preferably not less than 50% of a maximum diameter of the recess measured perpendicular to the axis is.
- each a web is provided, wherein fuel gases of the propellant initially flow radially outward from the ejection region between the lands before they after a deflection the
- Breakthroughs flow through in the axial direction.
- the deflection and turbulence of the fuel gases is further optimized, and undesired entry of large grains of powder into the openings is further reduced.
- the openings of the separating member have a cross section which is greater than a maximum cross section of particles of the propellant charge. This prevents clogging of the openings with
- the partition member is preferably screwed by means of an external thread formed in it in the combustion chamber.
- the separator is press fit into the combustion chamber, soldered, welded, glued, or otherwise positively secured.
- FIG. 1 shows a spatial sectional view of a combustion chamber of a first
- FIG. 2 shows a detailed spatial view of the combustion chamber from FIG. 1.
- FIG. 3 shows a three-dimensional view of a separating element of the combustion chamber from FIG. 1.
- Fig. 4 shows a three-dimensional view of a combustion chamber of a second
- Fig. 5 shows a three-dimensional view of a combustion chamber of a third
- Fig. 6 shows a three-dimensional view of a combustion chamber of a fourth
- a drive-in device comprises a hand-guided housing 1, in which a power transmission element in the form of a piston 2 is accommodated.
- the so acted upon by kinetic energy piston 2 comprises a piston rod, with which he encounters a fastener, which is thereby driven into a workpiece.
- the charge is presently received in a cartridge made of sheet metal.
- the cartridge has an impact fuse and is about to be ignited
- Cartridge and cartridge bearings are rotationally symmetrical about a central axis A.
- the central axis A is in the present examples at the same time a central axis of the combustion chamber 3 and the piston 2.
- the center axis of the combustion chamber is inclined relative to the central axis of the piston,
- the combustion chamber 3 is arranged between a circular opening 4a of the cartridge bearing 4 and the surface 2a of the piston 2.
- an annular recess 2b is formed in the piston 2, which contributes to a better turbulence of the combustion gases and forms part of the combustion chamber 3.
- the combustion chamber 3 is divided transversely to the central axis A by a partition member 5.
- the piston is retracted maximally, so that the second sub-chamber 3b at the time of ignition comprises only the trough 2b and possibly a narrow gap between the piston 2 and the separating member 5.
- the separating member 5 is presently designed as a screwed by means of an external thread 7 in the combustion chamber 3 component.
- the isolator can also be formed integrally with the rest of the combustion chamber or be connected in any other way as a separate component with the combustion chamber.
- the partition member 5 has a plurality of apertures 6, which are in the present case designed as bores which extend parallel to the axis A.
- the perforations 6 are arranged around a central region 8 of the separating member 5, which has a closed and non-perforated surface.
- the smallest diameter of the central, unbroken portion 8 in a plane perpendicular to the axis A is about 35% larger than a diameter of the open after ignition cartridge. In the present case, this corresponds approximately to the diameter of a combustion chamber-side opening of the cartridge bearing or of a surface of the pyrotechnic charge directed into the combustion chamber.
- the expanding charge moves predominantly in a prismatic discharge region along the central axis, the circumference of which is defined by the contour of the surface of the charge.
- all of the apertures 6 of the partition member are located outside a sectional area of the ejection area with the surface of the partition member.
- the discharge area is designed as a cylinder corresponding to the circular cartridge opening.
- a recess 9 is further formed in the central region 8 of the separating member 5.
- the recess 9 extends rotationally symmetrical about the central axis A. It is formed cup-shaped and has a flat bottom 9a.
- a diameter of the recess 9 tapers from a largest diameter d at its upper edge to a smallest diameter at the level of the bottom 9a.
- the walls of the recess 9 have both inclined and straight sections.
- the maximum depth of the recess 9 is presently about 60% of the largest diameter d. In the plane of the upper edge of the recess 9, the closed one extends
- the step 10 increases from the surface of the central region 8 in the axial direction to a roof of the combustion chamber 3.
- the partition member 5 is in this case pressed with the step 10 against the roof. This is done by appropriate screwing the separator 5 in the
- Combustion chamber 3 reached.
- the gradation 10 forms between adjacent apertures 6 each webs 1 1, which are directed radially inward. Accordingly, radially directed channels 12 remain between the webs 11, through which the fuel gases and charge particles initially flow radially outward from the central region 8 and are then deflected into the openings 6.
- the recess 9 is formed as a cup-shaped recess, but the walls of the recess are stronger and continuously inclined.
- the shape of the recess 9 is predominantly as in the example of FIG. 4.
- an upstanding, conical projection 13 is formed above the bottom of the recess. By the conical projection 13 there is a strong scattering and turbulence of the fuel gases.
- the recess 9 has no flat bottom, but has an overall approximately parabolic cross-section. Such a shape is particularly well suited for the prevention of deposits.
- the invention is not limited to the illustrated, exemplary shapes of the recess 9.
- the separating member has a plurality of recesses.
- one or more of the openings has the depression or depressions.
- the openings then preferably comprise blind holes into which one or more connecting channels in particular preferably open laterally.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14802653.7A EP3074186B1 (de) | 2013-11-26 | 2014-11-25 | Pyrotechnisches eintreibgerät |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13194459.7A EP2875903A1 (de) | 2013-11-26 | 2013-11-26 | Pyrotechnisches Eintreibgerät |
| EP14802653.7A EP3074186B1 (de) | 2013-11-26 | 2014-11-25 | Pyrotechnisches eintreibgerät |
| PCT/EP2014/075463 WO2015078833A1 (de) | 2013-11-26 | 2014-11-25 | Pyrotechnisches eintreibgerät |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3074186A1 true EP3074186A1 (de) | 2016-10-05 |
| EP3074186B1 EP3074186B1 (de) | 2018-01-03 |
Family
ID=49667033
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13194459.7A Withdrawn EP2875903A1 (de) | 2013-11-26 | 2013-11-26 | Pyrotechnisches Eintreibgerät |
| EP14802653.7A Active EP3074186B1 (de) | 2013-11-26 | 2014-11-25 | Pyrotechnisches eintreibgerät |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13194459.7A Withdrawn EP2875903A1 (de) | 2013-11-26 | 2013-11-26 | Pyrotechnisches Eintreibgerät |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US10160109B2 (de) |
| EP (2) | EP2875903A1 (de) |
| WO (1) | WO2015078833A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2886259A1 (de) * | 2013-12-18 | 2015-06-24 | HILTI Aktiengesellschaft | Eintreibgerät |
| EP2886260A1 (de) * | 2013-12-19 | 2015-06-24 | HILTI Aktiengesellschaft | Eintreibgerät |
| EP2923800A1 (de) * | 2014-03-28 | 2015-09-30 | HILTI Aktiengesellschaft | Pyrotechnisches Eintreibgerät |
| EP2923797A1 (de) * | 2014-03-28 | 2015-09-30 | HILTI Aktiengesellschaft | Pyrotechnisches Eintreibgerät |
| AU2015388710B2 (en) * | 2015-04-02 | 2020-09-03 | Sandvik Intellectual Property Ab | Multi-functional connector, drill head, and method |
| USD917255S1 (en) * | 2018-10-31 | 2021-04-27 | Hilti Aktiengesellschaft | Ammunition clip |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659768A (en) * | 1970-06-12 | 1972-05-02 | Olin Corp | Fastener driving tool |
| DE2214802A1 (de) * | 1972-03-25 | 1973-09-27 | Dynamit Nobel Ag | Feststoffraketenmotor |
| DE2340751C2 (de) * | 1973-08-11 | 1974-09-26 | Tracto-Technik Paul Schmidt, 5940 Lennestadt | Steuervorrichtung für den Vor- und Rücklauf von Rammbohrgeräten |
| DE2436446C2 (de) * | 1974-07-29 | 1984-11-29 | Hilti Ag, Schaan | Pulverkraftbetriebenes Setzgerät |
| US4403722A (en) * | 1981-01-22 | 1983-09-13 | Signode Corporation | Combustion gas powered fastener driving tool |
| US4483474A (en) * | 1981-01-22 | 1984-11-20 | Signode Corporation | Combustion gas-powered fastener driving tool |
| US4483473A (en) * | 1983-05-02 | 1984-11-20 | Signode Corporation | Portable gas-powered fastener driving tool |
| US4913331A (en) * | 1988-10-21 | 1990-04-03 | Hitachi Koki Company, Ltd. | Internal-combustion piston driving apparatus having a decompression channel |
| FR2764645B1 (fr) * | 1997-06-16 | 1999-08-20 | Aerospatiale | Chargement de propergol solide pour propulseur et propulseur muni d'un tel chargement |
| US6321968B1 (en) | 1998-09-10 | 2001-11-27 | Senco Products, Inc. | Combustion chamber design for propellant charges and power adjustment means |
| DE19962584C1 (de) * | 1999-12-23 | 2001-06-07 | Hilti Ag | Brennkraftbetriebenes Arbeitsgerät mit Zündregulierung |
| US7201301B2 (en) * | 2004-02-09 | 2007-04-10 | Illinois Tool Works Inc. | Exhaust system for combustion-powered fastener-driving tool |
| JP4446289B2 (ja) * | 2004-05-07 | 2010-04-07 | 日立工機株式会社 | 燃焼式釘打機 |
| JP4923461B2 (ja) * | 2005-07-20 | 2012-04-25 | マックス株式会社 | 打込み工具の低全高構造 |
| US7677426B2 (en) * | 2005-09-19 | 2010-03-16 | Stanley Fastening Systems, L.P. | Fastener driving device |
| TWI317682B (en) * | 2006-11-14 | 2009-12-01 | De Poan Pneumatic Corp | Air actuated nail driver |
| WO2009088896A1 (en) * | 2008-01-04 | 2009-07-16 | Illinois Tool Works Inc. | Combustion chamber and cooling system for fastener-driving tools |
| US8016046B2 (en) * | 2008-09-12 | 2011-09-13 | Illinois Tool Works Inc. | Combustion power source with back pressure release for combustion powered fastener-driving tool |
| TWM362088U (en) * | 2009-04-09 | 2009-08-01 | Cheng-Ho Lee | Gunpowder nail-hitting apparatus capable of adjusting nail-hitting force |
| JP5384282B2 (ja) * | 2009-10-07 | 2014-01-08 | 株式会社マキタ | 燃焼式作業工具 |
| TWI387514B (zh) * | 2010-09-20 | 2013-03-01 | 鑽全實業股份有限公司 | High pressure nail gun that eliminates exhaust noise |
| DE102010062962A1 (de) * | 2010-12-13 | 2012-06-14 | Hilti Aktiengesellschaft | Eintreibgerät |
| US10040183B2 (en) * | 2013-10-11 | 2018-08-07 | Illinois Tool Works Inc. | Powered nailer with positive piston return |
| EP2886258A1 (de) * | 2013-12-18 | 2015-06-24 | HILTI Aktiengesellschaft | Eintreibgerät |
-
2013
- 2013-11-26 EP EP13194459.7A patent/EP2875903A1/de not_active Withdrawn
-
2014
- 2014-11-25 WO PCT/EP2014/075463 patent/WO2015078833A1/de not_active Ceased
- 2014-11-25 EP EP14802653.7A patent/EP3074186B1/de active Active
- 2014-11-25 US US15/038,076 patent/US10160109B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015078833A1 (de) | 2015-06-04 |
| EP3074186B1 (de) | 2018-01-03 |
| EP2875903A1 (de) | 2015-05-27 |
| US10160109B2 (en) | 2018-12-25 |
| US20160303725A1 (en) | 2016-10-20 |
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