EP0054782A2 - Tampon d'amortissage dans les outils à impact - Google Patents

Tampon d'amortissage dans les outils à impact Download PDF

Info

Publication number
EP0054782A2
EP0054782A2 EP81110132A EP81110132A EP0054782A2 EP 0054782 A2 EP0054782 A2 EP 0054782A2 EP 81110132 A EP81110132 A EP 81110132A EP 81110132 A EP81110132 A EP 81110132A EP 0054782 A2 EP0054782 A2 EP 0054782A2
Authority
EP
European Patent Office
Prior art keywords
buffer
buffer element
buffer system
cylinder
percussion piston
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
Application number
EP81110132A
Other languages
German (de)
English (en)
Other versions
EP0054782B1 (fr
EP0054782A3 (en
Inventor
Gerhard Farian
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.)
Karl M Reich Maschinenfabrik GmbH
Original Assignee
Karl M Reich Maschinenfabrik GmbH
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 Karl M Reich Maschinenfabrik GmbH filed Critical Karl M Reich Maschinenfabrik GmbH
Priority to AT81110132T priority Critical patent/ATE15777T1/de
Publication of EP0054782A2 publication Critical patent/EP0054782A2/fr
Publication of EP0054782A3 publication Critical patent/EP0054782A3/de
Application granted granted Critical
Publication of EP0054782B1 publication Critical patent/EP0054782B1/fr
Expired 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
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/047—Mechanical details

Definitions

  • the invention relates to a buffer system according to the preamble of claim 1.
  • an impact device for driving in nails or the like is known, the buffer system of which consists of a relatively soft buffer element made of volume-compressible material and a hard buffer element interacting therewith, the contact surface of which rests fully on the bottom of the cylinder base .
  • This buffer system is able to absorb surges with excess pressure and empty surges safely and with a long service life.
  • the contact between the hard buffer element and the bottom of the cylinder base creates an unpleasant structure-borne noise with each impact, which is annoying for the operator. In extreme cases there is also a considerable deformation of the hard buffer element, which can then be damaged by internal friction and heating.
  • the object of the present invention is therefore to create a buffer system of the type mentioned at the outset which reliably absorbs and destroys the excess of impact with the lowest possible structure-borne noise and with the longest possible service life.
  • the movable arrangement of the hard buffer element means the interposition of a friction stage between the soft spring characteristic of the soft buffer element and the hard spring characteristic of the hard buffer element.
  • the hard buffer element is arranged with a prestress in the cylinder, so that it is pressed even more against the outer ring by the soft buffer element when compressed. Upon further compression, the excess impact energy is then destroyed by friction on the contact surfaces between the hard buffer element and the cylinder base or inner wall of the cylinder, and the heat generated can be dissipated well.
  • the hard buffer element lies with its entire contact surface on the bottom of the cylinder base, then it acts as in the known design as a hard, deformable buffer, which is heated up considerably by internal friction. This internal heating can also lead to the destruction of the hard buffer element, but at the same time there is an increase in structure-borne noise, which shows the operator that the buffer element must be replaced. This reliably prevents damage or destruction of parts of the wrapping device.
  • the design of the buffer system according to the invention offers the further advantage that this compressed air is only slowly and therefore quieter from the cylinder during the return stroke of the percussion piston escapes
  • the soft buffer element rests on the hard buffer element and thus severely limits the cross section of the vent opening.
  • a cylinder 2 is arranged in a housing 1, in which a percussion piston 3 is displaceably mounted with a percussion plunger 4.
  • Compressed air is supplied to the impact device from a compressed air source (not shown) by a handle 5 and, after actuation of the trigger 6, reaches the interior of cylinder 2 by actuation of a tubular valve slide 7, where the compressed air pushes the percussion piston 3 held by an elastic latching device 8 in the direction of the cylinder base 9 accelerates.
  • the nail 10 is knocked into a workpiece, not shown, in a known manner by means of a ram 4. Additional nails 10 are provided in a magazine 11.
  • the cylinder 2 is surrounded by an air reservoir 12, into which compressed air passes through openings 13 and 14 in cylinder 2 in a known manner during the stroke stroke. After releasing trigger 6, this compressed air acts on the underside of percussion piston 3 and conveys it back to its starting position.
  • the impact piston 3 meets a buffer system 15, which is shown enlarged in FIG. 2. It consists of a first, hard-elastic buffer element 16, which expediently consists of cross-linked polyurethane. Its contact surface 18 directed against the conical bottom 17 of the cylinder base 9 is also frustoconical, but its cone angle is smaller than the cone angle of the bottom. When the buffer system is in a relaxed position, there is an intermediate space 19 between the base 17 and the contact surface 18, while the buffer element 16 lies against the base 20.
  • the buffer element 16 furthermore has a cylindrical section 21, the outer diameter of which is larger than the inner diameter of cylinder 2, so that the buffer element 16 is arranged in cylinder 2 with prestress.
  • the percussion piston 3 has a cylindrical recess 24, the inside diameter of which is somewhat larger than the outside diameter of the buffer element 22.
  • left half shows the buffer system 15 in a relaxed state, the percussion piston 3 just touching the second buffer element 22. There is a space 19 between the bottom 17 and the contact surface 18.
  • the buffer system 15 is now compressed to destroy the excess impact energy, as shown in FIG. 2, right half.
  • the first buffer element 16 is spread by the compressed second buffer element 22 so that its cylindrical section 21 presses against cylinder 2 beyond the preload.
  • the percussion piston 3 is further braked once the cylindrical section 21 moves against the cylinder 2 and parts of the contact surface 18 against the substrate 20 with considerable friction, energy being destroyed by the formation of heat. This heat can be easily dissipated through the surrounding metal parts.
  • the first buffer element 16 acts as a hard buffer, which has been known since then and which can absorb further excess impact energy under internal deformation.
EP81110132A 1980-12-18 1981-12-04 Tampon d'amortissage dans les outils à impact Expired EP0054782B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81110132T ATE15777T1 (de) 1980-12-18 1981-12-04 Puffersystem bei einschlaggeraeten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3047662 1980-12-18
DE3047662A DE3047662C2 (de) 1980-12-18 1980-12-18 Puffersystem bei Einschlaggeräten

Publications (3)

Publication Number Publication Date
EP0054782A2 true EP0054782A2 (fr) 1982-06-30
EP0054782A3 EP0054782A3 (en) 1983-07-20
EP0054782B1 EP0054782B1 (fr) 1985-09-25

Family

ID=6119438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110132A Expired EP0054782B1 (fr) 1980-12-18 1981-12-04 Tampon d'amortissage dans les outils à impact

Country Status (6)

Country Link
US (1) US4441644A (fr)
EP (1) EP0054782B1 (fr)
JP (1) JPS57121484A (fr)
AT (1) ATE15777T1 (fr)
CA (1) CA1157201A (fr)
DE (1) DE3047662C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4515303A (en) * 1982-08-28 1985-05-07 Robert Bosch Gmbh Electric hammering apparatus with air-cushioned armature
GB2149712A (en) * 1983-11-14 1985-06-19 Umberto Monacelli Shock absorber arrangements for use in fastener driving apparatus
US4611742A (en) * 1984-10-09 1986-09-16 Robert Bosch Gmbh Electromagnetically operated driving tool with air damper
EP0661140A1 (fr) * 1993-12-03 1995-07-05 Kanematsu-Nnk Corporation Outil d'enfoncement d'attaches

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3119956C2 (de) * 1981-05-20 1984-11-22 Joh. Friedrich Behrens AG, 2070 Ahrensburg Schallgedämpftes Eintreibgerät für Befestigungsmittel
DE3412659A1 (de) * 1983-06-27 1985-01-17 Jürgen Ing.(grad.) 6600 Saarbrücken Hochstrasser Wechselweise in entgegengesetzten richtungen arbeitende drehvorrichtung zur erleichterung des eintreibens oder herausziehens von vortreibrohren
DE3702364A1 (de) * 1987-01-28 1988-08-04 Mo N Proizv Ob Mekh Handwerkzeug zum einschlagen von befestigungselementen
US4932480A (en) * 1988-12-16 1990-06-12 Illinois Tool Works Inc. Driving tool with air-cooled bumper
US5062857A (en) * 1990-06-05 1991-11-05 Advanced Prosthestetics Development Corporation Myoelectrically controlled knee joint locking device
US5224413A (en) * 1992-07-13 1993-07-06 Mosier Industries, Inc. Impact dampening means for power cylinders
DE9216394U1 (fr) * 1992-12-02 1993-02-11 Joh. Friedrich Behrens Ag, 2070 Ahrensburg, De
US5511759A (en) * 1994-05-26 1996-04-30 Steelcase, Inc. Hydraulic chair height adjustment mechanism
DE29508658U1 (de) * 1995-05-24 1995-07-27 Behrens Ag Friedrich Joh Eintreibgerät für Befestigungsmittel
US5617925A (en) * 1995-06-05 1997-04-08 Sencorp Assembly for decelerating a driver in a tool
JPH1029171A (ja) * 1996-07-11 1998-02-03 Furukawa Co Ltd 油圧ブレーカの防振機構
US5782461A (en) * 1996-12-19 1998-07-21 Lord Corporation Snubber using bulk loading
DE19800847A1 (de) * 1997-12-04 1999-06-17 Gerd Dr Ing Kellner Gerät zum Setzen eines Befestigungselementes in einen Setzuntergrund und Verwendung des Gerätes
ES2255275T3 (es) 1998-07-01 2006-06-16 Debiopharm S.A. Nueva ciclosporina con perfil de actividad mejorado.
US6044709A (en) * 1998-10-29 2000-04-04 Venturedyne, Ltd. Vibrator
US20050107889A1 (en) 2003-11-18 2005-05-19 Stephane Bedard Instrumented prosthetic foot
US7815689B2 (en) 2003-11-18 2010-10-19 Victhom Human Bionics Inc. Instrumented prosthetic foot
EP1718252B1 (fr) * 2004-02-12 2018-01-10 Össur hf Systeme et procede pour unite de pied a mouvement commande
US7637959B2 (en) * 2004-02-12 2009-12-29 össur hf Systems and methods for adjusting the angle of a prosthetic ankle based on a measured surface angle
US8231039B2 (en) * 2004-04-02 2012-07-31 Black & Decker Inc. Structural backbone/motor mount for a power tool
US7975893B2 (en) * 2004-04-02 2011-07-12 Black & Decker Inc. Return cord assembly for a power tool
US7726536B2 (en) 2004-04-02 2010-06-01 Black & Decker Inc. Upper bumper configuration for a power tool
US20050217416A1 (en) * 2004-04-02 2005-10-06 Alan Berry Overmolded article and method for forming same
US10882172B2 (en) 2004-04-02 2021-01-05 Black & Decker, Inc. Powered hand-held fastening tool
US7322506B2 (en) * 2004-04-02 2008-01-29 Black & Decker Inc. Electric driving tool with driver propelled by flywheel inertia
US7204403B2 (en) * 2004-04-02 2007-04-17 Black & Decker Inc. Activation arm configuration for a power tool
US8302833B2 (en) 2004-04-02 2012-11-06 Black & Decker Inc. Power take off for cordless nailer
US8011549B2 (en) * 2004-04-02 2011-09-06 Black & Decker Inc. Flywheel configuration for a power tool
US7138595B2 (en) 2004-04-02 2006-11-21 Black & Decker Inc. Trigger configuration for a power tool
US7165305B2 (en) * 2004-04-02 2007-01-23 Black & Decker Inc. Activation arm assembly method
ATE531484T1 (de) * 2004-04-02 2011-11-15 Black & Decker Inc Treiberkonfiguration für ein kraftbetriebenes werkzeug
US7686199B2 (en) * 2004-04-02 2010-03-30 Black & Decker Inc. Lower bumper configuration for a power tool
US7331403B2 (en) * 2004-04-02 2008-02-19 Black & Decker Inc. Lock-out for activation arm mechanism in a power tool
US8123099B2 (en) * 2004-04-02 2012-02-28 Black & Decker Inc. Cam and clutch configuration for a power tool
US7503401B2 (en) * 2004-04-02 2009-03-17 Black & Decker Inc. Solenoid positioning methodology
CA2863933C (fr) * 2004-12-22 2018-08-07 Ossur Hf Systemes et procedes de traitement du mouvement de membre
US7131563B2 (en) * 2005-01-28 2006-11-07 De Poan Pneumatic Corp. Nail driver bumper
SE528516C2 (sv) 2005-04-19 2006-12-05 Lisa Gramnaes Kombinerat aktivt och passivt benprotessystem samt en metod för att utföra en rörelsecykel med ett sådant system
US7556184B2 (en) * 2007-06-11 2009-07-07 Black & Decker Inc. Profile lifter for a nailer
WO2009123533A1 (fr) * 2008-03-31 2009-10-08 Atlas Copco Construction Tools Ab Outil de percussion
US7975777B2 (en) * 2008-12-19 2011-07-12 Robert Bosch Gmbh Cellular foam bumper for nailer
US9060884B2 (en) 2011-05-03 2015-06-23 Victhom Human Bionics Inc. Impedance simulating motion controller for orthotic and prosthetic applications
GB201308564D0 (en) * 2013-05-13 2013-06-19 Qinetiq Ltd Tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1285959B (de) * 1964-12-28 1968-12-19 Behrens Friedrich Joh Druckluftbetaetigtes Geraet zum Eintreiben von Naegeln, Heftklammern od. dgl.
DE1603733A1 (de) * 1967-07-12 1971-07-08 Behrens Friedrich Joh Vorrichtung zum Eintreiben von Naegeln,Klammern od.dgl.
DE2303536A1 (de) * 1972-03-01 1973-09-13 Senco Products Kolbenstoppvorrichtung fuer druckmediumwerkzeuge
DE2339163B1 (de) * 1973-08-02 1974-06-12 Karl M. Reich, Maschinenfabrik Gmbh, 7440 Nuertingen Schlagpuffer für Einschlaggeräte

Family Cites Families (11)

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US3496840A (en) * 1968-01-29 1970-02-24 Fastener Corp Fastener driving apparatus
US3583496A (en) * 1969-02-19 1971-06-08 Behrens Friedrich Joh Compressed air-operated drive-in apparatus to drive-in fastening means such as nails, staples or the like
DE6915710U (de) * 1969-04-19 1969-09-18 Reich Maschf Gmbh Karl Geraet zum einschlagen naegeln oder dergleichen.
US3653299A (en) * 1970-05-11 1972-04-04 Signode Corp Pneumatic piston return system and valve assembly for impact tools
DE2510858A1 (de) * 1975-03-12 1976-09-30 Signode Corp Einrichtung zum abfangen des schlagkolbens eines pneumatisch betaetigbaren eintreibwerkzeugs
DE2529873C3 (de) * 1975-07-04 1978-06-15 Heinrich Buehnen Kg, 2800 Bremen Kraftbetriebenes Eintreibwerkzeug für Befestigungsmittel
US4053093A (en) * 1975-11-28 1977-10-11 Thueringer Stephen E Air-actuated stapling gun improvement
JPS5854085Y2 (ja) * 1977-11-14 1983-12-09 東京光学機械株式会社 スリツトランプの調節装置
JPS5852065Y2 (ja) * 1979-02-19 1983-11-28 マックス株式会社 釘打機のバンパ装置
JPS5623021U (fr) * 1979-07-30 1981-03-02
US4320864A (en) * 1980-05-22 1982-03-23 Duo-Fast Corporation Muffler for fastener driving tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1285959B (de) * 1964-12-28 1968-12-19 Behrens Friedrich Joh Druckluftbetaetigtes Geraet zum Eintreiben von Naegeln, Heftklammern od. dgl.
DE1603733A1 (de) * 1967-07-12 1971-07-08 Behrens Friedrich Joh Vorrichtung zum Eintreiben von Naegeln,Klammern od.dgl.
DE2303536A1 (de) * 1972-03-01 1973-09-13 Senco Products Kolbenstoppvorrichtung fuer druckmediumwerkzeuge
DE2339163B1 (de) * 1973-08-02 1974-06-12 Karl M. Reich, Maschinenfabrik Gmbh, 7440 Nuertingen Schlagpuffer für Einschlaggeräte

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4515303A (en) * 1982-08-28 1985-05-07 Robert Bosch Gmbh Electric hammering apparatus with air-cushioned armature
GB2149712A (en) * 1983-11-14 1985-06-19 Umberto Monacelli Shock absorber arrangements for use in fastener driving apparatus
US4611742A (en) * 1984-10-09 1986-09-16 Robert Bosch Gmbh Electromagnetically operated driving tool with air damper
EP0661140A1 (fr) * 1993-12-03 1995-07-05 Kanematsu-Nnk Corporation Outil d'enfoncement d'attaches

Also Published As

Publication number Publication date
CA1157201A (fr) 1983-11-22
DE3047662C2 (de) 1985-02-21
JPS57121484A (en) 1982-07-28
ATE15777T1 (de) 1985-10-15
EP0054782B1 (fr) 1985-09-25
US4441644A (en) 1984-04-10
DE3047662A1 (de) 1982-07-22
JPH0211388B2 (fr) 1990-03-14
EP0054782A3 (en) 1983-07-20

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