EP0019563B1 - Pneumatisches Schlagwerkzeug mit einem Schwingungsdämpfer - Google Patents

Pneumatisches Schlagwerkzeug mit einem Schwingungsdämpfer Download PDF

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Publication number
EP0019563B1
EP0019563B1 EP80420051A EP80420051A EP0019563B1 EP 0019563 B1 EP0019563 B1 EP 0019563B1 EP 80420051 A EP80420051 A EP 80420051A EP 80420051 A EP80420051 A EP 80420051A EP 0019563 B1 EP0019563 B1 EP 0019563B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
handles
assembly
apertures
aforesaid
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
EP80420051A
Other languages
English (en)
French (fr)
Other versions
EP0019563B2 (de
EP0019563A1 (de
Inventor
Roger Montabert
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.)
Montabert SAS
Original Assignee
Montabert SAS
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9225837&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0019563(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Montabert SAS filed Critical Montabert SAS
Priority to AT80420051T priority Critical patent/ATE692T1/de
Publication of EP0019563A1 publication Critical patent/EP0019563A1/de
Publication of EP0019563B1 publication Critical patent/EP0019563B1/de
Application granted granted Critical
Publication of EP0019563B2 publication Critical patent/EP0019563B2/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B25D17/245—Damping the reaction force using a fluid

Definitions

  • the present invention relates to a vibration damper for a pneumatic percussion device, that is to say a device intended to reduce the accelerations of variable direction, generating vibrations, to which the handles of pneumatic percussion devices are subjected.
  • a pneumatic percussion device such as a concrete breaker, a picker, etc., is essentially composed of a cylindrical body comprising a bore inside which a piston or striking mass is slidably mounted.
  • the piston describes a reciprocating movement during which, at the end of its advance stroke, it strikes a tool, such as pick or chisel, engaged in a guide sleeve.
  • a device of this kind also frequently includes parts ensuring the distribution of compressed air alternately in the chambers situated above and below the piston, and handles, one of which is generally equipped with a system. supply, often comprising a valve whose opening is controlled by a trigger.
  • the invention aims to eliminate these drawbacks, by a technical solution which manages to reconcile the two contradictory requirements which have just been highlighted.
  • a vibration damper for pneumatic percussion device composed of a cylindrical body having a bore inside which is slidably mounted a piston capable of striking a tool, and comprising a sliding mounted assembly around the upper part of the body of the device, this assembly carrying the handles of the device and delimiting, between its internal wall and the top of the body of the device, a damping chamber supplied from a supply system provided on the assembly carrying the handles, shock absorber in which, according to the invention, the aforementioned sliding assembly, carrying the handles, is mounted with a set of determined value around the upper part of the body of the device, the chamber damping being fed through this play, and at least one channel is provided in the body of the device, between the aforementioned chamber and a point on the periphery of the body, this channel being extended outwards by another channel drilled in the sliding assembly carrying the handles.
  • a pneumatic suspension device is produced, supplied with a clearance determined so as to limit the consumption of compressed air, which escapes through the channels of the sliding assembly and of the body, this device absorbing vibrations and dissociating the movements of the combs from those of the cylinder.
  • the aforementioned clearance is delimited by two walls in relative movement which ensure a permanent "self-cleaning", avoiding its obstruction.
  • the above-mentioned assembly consists of a sleeve mounted to slide around the upper part of the body of the device, this sleeve comprising an annular chamber supplied with compressed air and communicating by lights with the clearance formed between said assembly and the body of the apparatus, and of a cylinder head surmounting said sleeve, this cylinder head being integral with the sleeve, comprising the handles and delimiting the aforementioned chamber by its internal wall.
  • the lights of the sleeve are located opposite other lights made in the body of the device and connected to the compressed air distribution system for the reciprocating movement of the piston.
  • This arrangement combines the supply of the device for its fundamental function with the supply of the vibration damper, the latter supply being in the form of a "leak" through the clearance provided between the sliding assembly and the body of the device.
  • the pneumatic percussion device shown in FIG. 1, comprises in a known manner a cylinder 1 in the bore 2 of which a piston 3 is slidably mounted.
  • the latter strikes a peak 4 guided by a socket 5, itself advantageously sliding rise in the lower part of the bore 2 of the cylinder 1, so that it can follow the peak 4 in its movements
  • maintaining in angular position of the peak 4 relative to the cylinder 1 is produced by means of grooves 6, provided between the sleeve 5 and the cylinder 1.
  • This cylinder 1 is closed, at its lower part, by a closing part 7 allowing the pick 4 to pass and, at its upper part, by two parts 8 and 9, fixed by means of bolts 10 (only one of which is indicated on the figure 1).
  • These parts 8 and 9 contain the compressed air distribution system, with in particular air inlet channels 11 and an air distribution valve 12 indicated very schematically.
  • a sleeve 13 is slidably mounted around the upper part of the cylinder 1, the section of which has a circular contour, a clearance d being formed between the outer surface of the cylinder 1 and the bore of the sleeve 13.
  • the latter comprises an annular chamber 14, completely surrounding the cylinder 1.
  • Above the sleeve 13 is mounted, and fixed by means of screws 15, a cylinder head 16 which has two opposite lateral handles 17 and 18.
  • the annular chamber 14 has an air inlet orifice 19, capable of being closed by a valve 20, the supply of the device with compressed air being by means of a connector 21.
  • the opening of the valve 20 is manually controlled from a trigger 22, associated with the handle 17, this by means of a pusher 23 passing right through the cylinder head 16.
  • the closing of the valve 20 is caused by a spring return 24 bearing on an inner shoulder of the connector 21.
  • the closure part 8 has, at its periphery, grooves 25 which cooperate with complementary grooves 26 formed inside the cylinder head 16. These grooves 25 and 26 allow axial sliding of the cylinder head 16 with respect to the cylinder 1, and make it possible, from the handles 17 and 18 and also thanks to the grooves 6, to actuate the peak 4 angularly.
  • a chamber 27 is formed between the internal wall of the cylinder head 16, the closing pieces 8 and 9, and the part of the cylinder 1 projecting above the sleeve 13 inside the cylinder head 16, a chamber 27 is formed.
  • the volume of this chamber 27 is variable, as a function of the relative position of the cylinder 1 and of the sleeve 13-cylinder head assembly 16, and in this regard it will also be noted that the stroke of the cylinder 1 is limited, by one bet, by the support of the part 9 against the bottom of the chamber 27, and on the other hand, by the abutment of the grooves 25 of the part 8 against the upper face of the sleeve 13.
  • Lights 28 are formed between the annular chamber 14 of the sleeve 13 and the bore of the same sleeve. These lights 28 are located opposite other lights 29 formed on the periphery of the cylinder 1 and connected to the channels 11 of the part 8, previously mentioned. As shown in Figure 3, the lights 28 have an oblong shape, while the lights 29 have an inverted »T « shape. These slots 28 and 29 are advantageously arranged symmetrically, for example in diametrically opposite pairs, to balance the forces generated by the air pressure.
  • a channel 30 is drilled through the cylinder 1 and the closure parts 8 and 9, parallel to the axis of the cylinder, this channel opening on the one hand into the chamber 27, on the other hand at the periphery of the cylinder 1 , substantially opposite a last channel 31, radially pierced in the sleeve 13 and opening out to 1 outside.
  • the compressed air admitted into the annular chamber 14 through the opening of the valve 20, is directed by the lights 28 towards the cylinder 1.
  • a small part of the air infiltrates between the cylinder 1 and the sleeve 13, and feeds the chamber 27.
  • the other part of the air will, through the ports 29 and the distribution system 11 -12, actuate the piston 3, in a known manner, putting into operation the device.
  • a balance is established, during operation, between the quantity of air admitted into the chamber 27 by the clearance between the cylinder 1 and the sleeve 13, on the one hand, and the quantity of exhaust air. outward through channels 30 and 31, on the other hand.
  • the relative position of the lights 28 and 29, through which the percussion system is supplied changes; it is thus understood that a studied shape given to these lights allows a dosage of the quantity of air admitted, therefore of the power of the device, according to the support exerted on the handles, so that the movement of the entire device remains coordinated, until the support is completely removed, then until the device is removed, this latter operation then being carried out under very low power, therefore at very reduced power and, therefore, without excessive acceleration.
  • the device according to the invention prevents accelerations at the handles from reaching a value detrimental to the health of the user and, moreover, the design of the vibration damper leads to self-regulation of the supply of compressed air and of the power of the percussion device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Actuator (AREA)

Claims (5)

1. Schwingungsdämpfer für pneumatische Schlaggeräte, mit einem zylindrischen Körper (1), der eine Bohrung (2) enthält, in deren Innerem ein auf ein Werkzeug (4) schlagender Kolben (3) gleitbar angeordnet ist, und einer gleitbar um den oberen Bereich des Gerätekörpers (1) herum angeordneten Einheit (13, 14), die die Gerätegriffe (17, 18) trägt und eine zwischen ihrer Innenwand und dem oberen Ende des Gerätekörpers (1) befindliche Dämpfungskammer (27) begrenzt, die von einem an der die Griffe (17, 18) tragenden Einheit vorgesehenen Zuführungssystem gespeist wird, dadurch gekennzeichnet, daß die die Griffe (17, 18) tragende gleitbare Einheit (13, 16) mit einem einen bestimmten Wert besitzenden Spiel (d) um den oberen Bereich des Gerätekörpers (1) herum angeordnet ist, wobei die Dämpfungskammer (27) über dieses Spiel (d) gespeist wird, und daß mindestens ein Kanal (30) in dem Gerätekörper (1) zwischen der Kammer (27) und einer Umfangsstelle des Körpers (1) vorgesehen ist, wobei dieser Kanal (30) nach außen hin durch einen anderen Kanal (31) verlängert ist, der in die die Griffe (17, 18) tragende gleitbare Einheit (13, 16) eingeformt ist.
2. Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die Einheit aus einer gleitbar um den Oberbereich des Gerätekörpers (1) herum angeordneten Muffe oder Hülse (13), die eine mit Druckluft gespeiste und durch Öffnungen (28) mit dem zwischen der Einheit und dem Gerätekörper vorhandenen Spiel (d) in Verbindung stehende Ringkammer (14) enthält, und einem Kopfstück (16) zusammengesetzt ist, das die Muffe oder Hülse (13) überragt, fest mit der Muffe oder Hülse (13) verbunden ist, die Gerätegriffe (17, 18) trägt und mit seiner Innenwand die Kammer (27) begrenzt.
3. Schwingungsdämpfer nach Anspruch 2, dadurch gekennzeichnet, daß die Öffnungen (28) der Muffe oder Hülse (13) anderen Öffnungen (29) gegenüberliegend angeordnet sind, die in den Gerätekörper (1) eingearbeitet und mit dem für die beidseitige Verschiebung des Kolbens (3) vorgesehenen Druckluftverteilersystem (12) verbunden sind.
4. Schwingungsdämpfer nach Anspruch 3, dadurch gekennzeichnet, daß die ersten Öffnungen (28) eine längliche Gestalt besitzen, während die zweiten Öffnungen (29) die Gestalt eines umgekehrten »T« aufweisen.
5. Schwingungsdämpfer nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Öffnungen (28, 29) in symmetrischer Weise angeordnet sind, z. B. indem einander diametral gegenüberliegende Paare vorhanden sind.
EP80420051A 1979-05-15 1980-05-05 Pneumatisches Schlagwerkzeug mit einem Schwingungsdämpfer Expired EP0019563B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80420051T ATE692T1 (de) 1979-05-15 1980-05-05 Schwingungsdaempfer fuer pneumatisches schlagwerkzeug.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7913278 1979-05-15
FR7913278A FR2456593A1 (fr) 1979-05-15 1979-05-15 Amortisseur de vibrations pour appareil pneumatique a percussions

Publications (3)

Publication Number Publication Date
EP0019563A1 EP0019563A1 (de) 1980-11-26
EP0019563B1 true EP0019563B1 (de) 1982-02-17
EP0019563B2 EP0019563B2 (de) 1988-05-04

Family

ID=9225837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80420051A Expired EP0019563B2 (de) 1979-05-15 1980-05-05 Pneumatisches Schlagwerkzeug mit einem Schwingungsdämpfer

Country Status (6)

Country Link
US (1) US4308926A (de)
EP (1) EP0019563B2 (de)
AT (1) ATE692T1 (de)
DE (1) DE3060199D1 (de)
ES (1) ES8101445A1 (de)
FR (1) FR2456593A1 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE421182B (sv) * 1980-04-25 1981-12-07 Atlas Copco Ab Vibrationsdempat slagverktyg
CS226230B1 (en) * 1981-04-28 1984-03-19 Vladimir Ing Koudelka Manual pneumatic percussive tool
CH664730A5 (de) * 1983-07-21 1988-03-31 Sig Schweiz Industrieges Verfahren und vorrichtung zur daempfung des rueckpralles bei schlagwerkzeugen.
US4776408A (en) * 1987-03-17 1988-10-11 Deutsch Fastener Corporation Pneumatic impact tool
FR2647870B1 (fr) * 1989-06-06 1991-09-06 Eimco Secoma Appareil de percussion hydraulique avec dispositif d'amortissement des ondes de choc en retour
SE501200C2 (sv) * 1989-10-28 1994-12-05 Berema Atlas Copco Ab Slagverktyg
EP0471649A1 (de) * 1990-08-16 1992-02-19 SIG Schweizerische Industrie-Gesellschaft Durch ein Druckmedium betriebener Hammer
WO1993006972A1 (en) * 1991-10-09 1993-04-15 Sovmestnoe Sovetsko-Finskoe Predpriyatie Rpf-D Pneumatic hammer
GB9206978D0 (en) * 1992-03-31 1992-05-13 Compair Power Tools Improvements in pneumatic power tools
US5431235A (en) * 1994-04-28 1995-07-11 Ingersoll-Rand Company Reciprocal chuck for paving breaker
SE506083C2 (sv) * 1995-07-06 1997-11-10 Berema Atlas Copco Ab Pneumatiskt slagverktyg
US6932166B1 (en) 2002-12-03 2005-08-23 Paul Kirsch Pneumatic tool
US7478096B2 (en) * 2003-02-26 2009-01-13 Burnside Acquisition, Llc History preservation in a computer storage system
AT501861B1 (de) * 2005-05-25 2009-08-15 Bbg Baugeraete Gmbh Handgeführter, vibrationsgedämpfter drucklufthammer
SE528743C2 (sv) * 2005-06-22 2007-02-06 Atlas Copco Rock Drills Ab Slagverk för bergborrmaskin, förfarande för åstadkommande av en fram- och återgående slagkolvrörelse och bergborrmaskin
SE531658C2 (sv) * 2006-10-02 2009-06-23 Atlas Copco Rock Drills Ab Slagverk jämte bergborrmaskin och bergborrigg
US8240394B2 (en) * 2008-12-09 2012-08-14 Sp Air Kabushiki Kaisha Hammer with vibration reduction mechanism
TWI548497B (zh) * 2015-08-25 2016-09-11 Pneumatic tools with trigger

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR804653A (fr) * 1936-04-08 1936-10-29 Dame fonctionnant à la manière d'un moteur à explosions
US2500036A (en) * 1945-12-22 1950-03-07 Cleveland Pneumatic Tool Co Cushioned handle for portable percussive tools
DE963948C (de) * 1952-05-03 1957-05-16 Hauhinco Maschf Drucklufthammer mit Schiebegriff
US2748750A (en) * 1953-01-13 1956-06-05 Armour Res Found Vibrationless pneumatic impact tool
US2899934A (en) * 1956-01-19 1959-08-18 salengro
US3010431A (en) * 1960-01-05 1961-11-28 Atlas Copco Ab Percussion tools
US3223181A (en) * 1962-03-27 1965-12-14 Vernon L Price Vibrationless air hammer assembly
US3255832A (en) * 1962-11-27 1966-06-14 Leavell Charles Vibrationless percussive tool
CS149009B1 (de) * 1971-02-01 1973-05-24
US3727700A (en) * 1971-04-19 1973-04-17 Chicago Pneumatic Tool Co Pneumatically percussive tool having a vibration free handle
SU457594A1 (ru) * 1973-05-10 1975-01-25 Предприятие П/Я А-1698 Механизм ударного действи
SE398066B (sv) * 1975-03-18 1977-12-05 Atlas Copco Ab Sett och anordning vid slaende bearbetning for dempning av rekylen fran ett arbetsverktyg
SU716805A1 (ru) * 1977-11-18 1980-02-25 Проектно-Конструкторское Бюро Ордена Трудового Красного Знамени Академии Коммунального Хозяйства Имени К.Д.Памфилова Виброзащитное устройство дл ручных инструментов ударного действи

Also Published As

Publication number Publication date
ES491467A0 (es) 1980-12-16
DE3060199D1 (en) 1982-03-25
FR2456593A1 (fr) 1980-12-12
EP0019563B2 (de) 1988-05-04
FR2456593B1 (de) 1982-07-23
ATE692T1 (de) 1982-03-15
ES8101445A1 (es) 1980-12-16
US4308926A (en) 1982-01-05
EP0019563A1 (de) 1980-11-26

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