EP0054782B1 - Tampon d'amortissage dans les outils à impact - Google Patents

Tampon d'amortissage dans les outils à impact Download PDF

Info

Publication number
EP0054782B1
EP0054782B1 EP81110132A EP81110132A EP0054782B1 EP 0054782 B1 EP0054782 B1 EP 0054782B1 EP 81110132 A EP81110132 A EP 81110132A EP 81110132 A EP81110132 A EP 81110132A EP 0054782 B1 EP0054782 B1 EP 0054782B1
Authority
EP
European Patent Office
Prior art keywords
cushioning
cushioning element
cylinder
buffer
buffer element
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.)
Expired
Application number
EP81110132A
Other languages
German (de)
English (en)
Other versions
EP0054782A3 (en
EP0054782A2 (fr
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 capable of absorbing surges with excess pressure and empty strokes safely and with a long service life. Due to the contact between the hard buffer element and the bottom of the cylinder base, however, an unpleasant structure-borne noise is generated with each stroke, and this disturbs the operator. In extreme cases, the hard buffer element is considerably deformed, 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 eliminates 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 in the cylinder with a prestress, so that when the soft buffer element is pressed together, it is pressed even more strongly against the outer ring. 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 destroy 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 because 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 with a percussion plunger 4 is slidably mounted.
  • a handle 5 compressed air is supplied to the impact device from a compressed air source, not shown, and after actuation of trigger 6 by actuation of a tubular valve slide 7 enters the interior of cylinder 2, where the compressed air strikes the piston 3 held by an elastic locking device 8 in the direction of the cylinder base 9 accelerates.
  • the nail 10 is driven 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 strikes 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 base 17 of the cylinder base 9 is also frustoconical, but its cone angle is smaller than the cone angle of the base. When the buffer system is in a relaxed position, there is therefore a space 19 between the base 17 and the contact surface 18, while the buffer element 16 rests on the base 20.
  • the buffer element 16 also has a cylindrical section 21, the outside diameter of which is larger than the inside diameter of cylinder 2, so that the buffer element 16 is arranged in cylinder 2 with a prestress.
  • a second buffer is seated on the first buffer element 16 against the percussion piston 3 element 22, which preferably consists of cellular polyurethane elastomer. Due to the cellular structure, a progressive spring characteristic is achieved in a known manner, its end face 23 directed against the percussion piston 3 is beveled outwards.
  • 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, as shown in FIG. 2, right half.
  • the first buffer element 16 is spread by the compressed second buffer element 22 such that its cylindrical section 21 presses against cylinder 2 beyond the pretension.
  • 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 dissipated to form heat. This heat can be easily dissipated via 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.

Claims (7)

1. Système amortisseur destiné aux apparails enfonceurs et permettant de planter des clous ou autres au moyen d'un piston frappeur (3) se mouvant dans un cylindre (2) à l'aide d'air comprimé. Caractéristiques:
a) le système amortisseur (15) est disposé à l'extrémité percutante du cylindre (2) afin d'absorber la puissance de frappe excédentaire du piston frappeur(3)
b) il se compose d'au moins deux éléments amortisseurs (16 et 22) de duretés différentes
c) un premier élément amortisseur élastique dur (16) repose sur un fond (17) bornant le cylindre (2)
d) un second élément amortisseur élastique souple (22) fonctionne conjointement au premier élément amortisseur (16)

caractérisé par le fait qu'un espace intermédiaire (19) est prévu entre une partie de la surface de contact (18) du premier élément amortisseur (16) et le fond (17), de sorte qu'il est possible de faire bouger une partie au moins du premier élément amortisseur (16) avec sa surface de contact (18) dirigée contre le pied du cylindre (9).
2. Système amortisseur d'après la revendication 1, caractérisé par le fait que le premier élément amortisseur (16) est formé comme un cône tronqué en forme de pot qui repose - au moins partiellement - sur le fond conique (17).
3. Système amortisseur d'après la revendication 2, caractérisé par le fait que l'angle de cône de la surface de contact (18) du premier élément amortisseur (16) est plus faible que l'angle de cône du fond (17).
4. Système amortisseur d'après une des revendications 1 à 3, caractérisé par le fait que le premier élément amortisseur (16) présente une section cylindrique (21) en sa circonférence extérieure, section dont le diamètre extérieur est supérieur au diamètre intérieur du cylindre (2) entourant le premier élément amortisseur (16).
5. Système amortisseur d'après une des revendications 1 à 4, caractérisé par le fait que le deuxième élément amortisseur (22) est disposé sur le premier élément amortisseur (16).
6. Système amortisseur d'après la revendication 5, caractérisé par le fait que le piston frappeur (3) présente une gorge ouverte (24) contre le système amortisseur (15), gorge dont le diamètre intérieur est supérieur au diamètre extérieur du deuxième élément amortisseur (22).
7. Système amortisseur d'après la revendication 6, caractérisé par le fait que la surface extérieure (23) du deuxième élément amortisseur (22), dirigée contre le piston frappeur (3), est biseautée vers l'extérieur.
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
DE3047662A DE3047662C2 (de) 1980-12-18 1980-12-18 Puffersystem bei Einschlaggeräten
DE3047662 1980-12-18

Publications (3)

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

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DE3232120A1 (de) * 1982-08-28 1984-03-01 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betriebenes einschlaggeraet
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
GB2149712A (en) * 1983-11-14 1985-06-19 Umberto Monacelli Shock absorber arrangements for use in fastener driving apparatus
DE3437019C2 (de) * 1984-10-09 1994-01-20 Bosch Gmbh Robert Elektromagnetisch betriebenes Einschlaggerät mit einem Luftdämpfer
DE3702364A1 (de) * 1987-01-28 1988-08-04 Mo N Proizv Ob Mekh Handwerkzeug zum einschlagen von befestigungselementen
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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
JPH07156078A (ja) * 1993-12-03 1995-06-20 Kanematsu Nnk Corp 固着具打撃工具
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
PT1091975E (pt) * 1998-07-01 2006-05-31 Debiopharm Sa Nova ciclosporina com um perfil de actividade melhorado
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
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
AU2005215769B2 (en) * 2004-02-12 2012-01-19 Ossur Hf. System and method for motion-controlled foot unit
US7686199B2 (en) * 2004-04-02 2010-03-30 Black & Decker Inc. Lower bumper configuration for a power tool
US8231039B2 (en) * 2004-04-02 2012-07-31 Black & Decker Inc. Structural backbone/motor mount for a power tool
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US8011549B2 (en) * 2004-04-02 2011-09-06 Black & Decker Inc. Flywheel configuration for a power tool
US7165305B2 (en) * 2004-04-02 2007-01-23 Black & Decker Inc. Activation arm assembly method
CA2561960A1 (fr) * 2004-04-02 2005-10-20 Black & Decker Inc. Configuration de l'entraineur d'un outil electrique
US8123099B2 (en) * 2004-04-02 2012-02-28 Black & Decker Inc. Cam and clutch configuration for a power tool
US7138595B2 (en) 2004-04-02 2006-11-21 Black & Decker Inc. Trigger configuration for a power tool
US7322506B2 (en) * 2004-04-02 2008-01-29 Black & Decker Inc. Electric driving tool with driver propelled by flywheel inertia
US7975893B2 (en) * 2004-04-02 2011-07-12 Black & Decker Inc. Return cord assembly for a power tool
US7503401B2 (en) * 2004-04-02 2009-03-17 Black & Decker Inc. Solenoid positioning methodology
US7726536B2 (en) 2004-04-02 2010-06-01 Black & Decker Inc. Upper 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
US8302833B2 (en) 2004-04-02 2012-11-06 Black & Decker Inc. Power take off for cordless nailer
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Also Published As

Publication number Publication date
DE3047662C2 (de) 1985-02-21
ATE15777T1 (de) 1985-10-15
DE3047662A1 (de) 1982-07-22
EP0054782A3 (en) 1983-07-20
JPH0211388B2 (fr) 1990-03-14
US4441644A (en) 1984-04-10
JPS57121484A (en) 1982-07-28
EP0054782A2 (fr) 1982-06-30
CA1157201A (fr) 1983-11-22

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