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EP0115241B1 - Percussive tool with swinging handles - Google Patents

Percussive tool with swinging handles
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Publication number
EP0115241B1
EP0115241B1EP83420020AEP83420020AEP0115241B1EP 0115241 B1EP0115241 B1EP 0115241B1EP 83420020 AEP83420020 AEP 83420020AEP 83420020 AEP83420020 AEP 83420020AEP 0115241 B1EP0115241 B1EP 0115241B1
Authority
EP
European Patent Office
Prior art keywords
handles
hammer
tool
percussive
lever
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
EP83420020A
Other languages
German (de)
French (fr)
Other versions
EP0115241A1 (en
Inventor
Henri Emonet
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.)
Maco Meudon SA
Original Assignee
Maco Meudon SA
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 Maco Meudon SAfiledCriticalMaco Meudon SA
Priority to DE8383420020TpriorityCriticalpatent/DE3376740D1/en
Priority to AT83420020Tprioritypatent/ATE34531T1/en
Priority to EP83420020Aprioritypatent/EP0115241B1/en
Priority to ES525819Aprioritypatent/ES8502015A1/en
Priority to US06/553,409prioritypatent/US4576241A/en
Publication of EP0115241A1publicationCriticalpatent/EP0115241A1/en
Application grantedgrantedCritical
Publication of EP0115241B1publicationCriticalpatent/EP0115241B1/en
Expiredlegal-statusCriticalCurrent

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Abstract

A tool assembly of the automatic hammering or roto-hammering type and a handle assembly therefor. The tool assembly includes a breaking tool having a longitudinal axis. The handle assembly includes a head fixedly interconnected with the tool and two handles pivotally interconnected with the head. The handles include elongated crossed levers and are each provided with biasing members biasing the handles towards the head.

Description

Translated fromFrench

La présente invention est relative à un outil percutant ou roto-percutant connu sous le nom de marteau piqueur, brise-béton ou perforateur, quelle que soit sa source d'énergie. On sait qu'un tel appareil comporte des poignées servant à tenir et guider l'outil.The present invention relates to a percussive or rotary-percussive tool known as a jackhammer, concrete breaker or perforator, whatever its energy source. We know that such an apparatus includes handles used to hold and guide the tool.

Un tel outil étant soumis à des vibrations importantes on a cherché à rendre son utilisation moins pénible pour l'ouvrier en suspendant les poignées par rapport au corps de l'appareil. Pour cela, une solution consiste à monter les poignées sur une tête cylindrique creuse qui constitue un vérin coulissant sur le corps du marteau.Since such a tool is subjected to significant vibrations, attempts have been made to make its use less painful for the worker by suspending the handles relative to the body of the device. For this, one solution consists in mounting the handles on a hollow cylindrical head which constitutes a sliding cylinder on the body of the hammer.

Les inconvénients de cette solution connue sont multiples. En particulier, l'efficacité d'une suspension diminue avec l'apparition du frottement ; or, il y a énormément de frottements sur un gros diamètre, lors du mouvement de la tête coulissante qui porte les poignées. Ce mouvement s'effectue également sur une grande longueur et on constate qu'il donne lieu à l'apparition de points durs après un certain temps d'utilisation sur les chantiers.The disadvantages of this known solution are manifold. In particular, the effectiveness of a suspension decreases with the appearance of friction; However, there is a lot of friction on a large diameter, during the movement of the sliding head which carries the handles. This movement is also carried out over a great length and we see that it gives rise to the appearance of hard spots after a certain time of use on construction sites.

Dans le cas d'un outil à air comprimé, l'air arrive dans les poignées (qui sont suspendues) pour être ensuite acheminé au corps de l'outil (qui n'est pas suspendu). Des joints d'étanchéité ou des canalisations de distribution déformables doivent donc être prévus entre les deux parties suspendus et non suspendus.In the case of a compressed air tool, air arrives in the handles (which are suspended) to then be conveyed to the body of the tool (which is not suspended). Deformable seals or distribution pipes must therefore be provided between the two suspended and unsprung parts.

Si le pic de l'outil vient à se coincer, il n'est pas possible de faire fonctionner l'appareil à vide pour le décoincer, comme cela est l'usage sur les appareils non suspendus.If the pick of the tool gets stuck, it is not possible to operate the device empty to loosen it, as is the case on non-hanging devices.

Dans l'état antérieur de la technique, le brevet d'Allemagne Fédérale 2.219.320 (DE-B-2 219 320) comprend deux poignées oscillant autour d'un axe commun qui leur est parallèle. Cet axe traverse sur toute la largeur le corps du marteau pneumatique. Les poignées oscillent entre deux butées haute et basse qui dépassent latéralement hors du carter.In the prior art, German Federal Patent 2,219,320 (DE-B-2,219,320) comprises two handles oscillating around a common axis which is parallel to them. This axis crosses the entire width of the pneumatic hammer. The handles oscillate between two upper and lower stops which protrude laterally out of the housing.

Un tel système ne peut donc pas être adapté après coup sur un marteau pneumatique dont le corps ne serait pas spécialement conçu à cet effet.Such a system cannot therefore be adapted after the fact on an air hammer, the body of which is not specially designed for this purpose.

De plus, on voit mal comment la commande de déclenchement d'air comprimé pourrait être disposée pour rester accessible quand les poignées oscillent.In addition, it is difficult to see how the compressed air trigger control could be arranged to remain accessible when the handles oscillate.

L'état antérieur de la technique comprend aussi le brevet français 2.317.054 (FR-A-2 317 054) où des poignées restent rigidement alignées avec une barre transversale. L'utilisateur n'a donc aucune sensation de leur mouvement par rapport au marteau. Il est clair que ce système, plus encombrant que le marteau proprement dit (système à deux rotors) ne pourrait pas être adapté après coup sur un marteau de type classique.The prior art also includes French patent 2,317,054 (FR-A-2,317,054) where handles remain rigidly aligned with a crossbar. The user therefore has no sensation of their movement relative to the hammer. It is clear that this system, more bulky than the hammer proper (two-rotor system) could not be adapted after the fact on a hammer of conventional type.

La présente invention a pour but d'éviter ces inconvénients en réalisant un outil à poignées suspendues et qui ne donne lieu à aucun risque de coincement tout en permettant de faire de la marche à vide pour décoincer le pic. Bien mieux, l'invention vise à réaliser un système de suspension des poignées qui soit indépendant du marteau proprement dit : on peut donc adapter ce système après coup sur un marteau existant déjà.The present invention aims to avoid these drawbacks by providing a tool with hanging handles and which gives rise to no risk of jamming while allowing idling to loosen the pick. Much better, the invention aims to achieve a handle suspension system which is independent of the hammer itself: we can therefore adapt this system after the fact on an already existing hammer.

Un marteau selon l'invention comprend deux poignées surmontant le corps de l'outil, chacune solidaire d'un bras de levier articulé sur la tête du corps du marteau par un axe, et il est caractérisé en ce que cet axe d'articulation est perpendiculaire à l'axe longitudinal du marteau, ainsi qu'au plan d'oscillation commun balayé par les deux leviers qui se croisent sur l'axe longitudinal du marteau.A hammer according to the invention comprises two handles surmounting the body of the tool, each secured to a lever arm articulated on the head of the body of the hammer by an axis, and it is characterized in that this axis of articulation is perpendicular to the longitudinal axis of the hammer, as well as to the common plane of oscillation swept by the two levers which cross on the longitudinal axis of the hammer.

Suivant une autre caractéristique de l'invention, l'axe d'articulation de chaque levier, est constitué par un pion cylindrique, faisant saillie latéralement sur une extrémité du levier, les deux pions étant orientés dans des directions parallèles, mais opposées.According to another characteristic of the invention, the axis of articulation of each lever, is constituted by a cylindrical pin, projecting laterally on one end of the lever, the two pins being oriented in parallel, but opposite directions.

Suivant une autre caractéristique de l'invention, l'ensemble d'un levier et de sa poignée, possède une longueur totale sensiblement triple de celle de la poignée, proprement dite.According to another characteristic of the invention, the assembly of a lever and its handle, has a total length substantially triple that of the handle, proper.

Le dessin annexé, donné à titre d'exemple non limitatif, permettra de mieux comprendre les caractéristiques de l'invention.The appended drawing, given by way of nonlimiting example, will allow a better understanding of the characteristics of the invention.

Fig. 1 est une vue en perspective d'un marteau selon l'invention.Fig. 1 is a perspective view of a hammer according to the invention.

Fig. 2 est une vue éclatée partielle montrant le détail des poignées suspendues.Fig. 2 is a partial exploded view showing the detail of the hanging handles.

On a représenté sur les dessins un marteau brise-béton 1, dont la tête 2 porte deux poignées de commande 3 et 4.The drawings show a concrete breaker hammer 1, the head 2 of which carries twocontrol handles 3 and 4.

Suivant l'une des caractéristiques de l'invention, chaque poignée 3, 4 est solidaire d'un levier référence respectivement 6,7. Ces leviers se croisent et chacun d'eux comporte, à son extrémité, un pion d'articulation cylindrique transversale, référencé respectivement 8, 9.According to one of the characteristics of the invention, eachhandle 3, 4 is integral with a lever respectively reference 6,7. These levers intersect and each of them comprises, at its end, a transverse cylindrical articulation pin, referenced respectively 8, 9.

On voit sur les figures 1 et 2 que les deux leviers 6 et 7 sont montés côte à côte, les pions 8 et 9 faisant saillie transversalement dans les directions parallèles et opposées. Le pion d'articulation 8 du levier 7 est dirigé vers l'arrière sur la figure 2 tandis que le pion 9 du levier 7 est tourné vers l'avant. Ainsi, chacun des deux leviers 6, 7 peut osciller de même que la poignée correspondante 3, 4 comme schématisé en figure 2 par les flèches 10 et 11.We see in Figures 1 and 2 that the two levers 6 and 7 are mounted side by side, thepins 8 and 9 projecting transversely in the parallel and opposite directions. Thehinge pin 8 of the lever 7 is directed towards the rear in FIG. 2 while the pin 9 of the lever 7 is turned towards the front. Thus, each of the two levers 6, 7 can oscillate as does thecorresponding handle 3, 4 as shown diagrammatically in FIG. 2 by thearrows 10 and 11.

En ce qui concerne les leviers 6 et 7 des poignées oscillantes 3, 4 ils sont équipés de moyens élastiques de rappel, non représentés, qui tendent à rappeler les poignées vers le haut, les leviers 6, 7 venant alors en butée sur le sommet 12 de la tête 2 du marteau 1. Ces moyens de rappel élastique peuvent être de toutes sortes, ressorts, caoutchoucs, ou encore vérins pneumatiques ou hydrauliques.Regarding the levers 6 and 7 of theoscillating handles 3, 4 they are equipped with elastic return means, not shown, which tend to return the handles upwards, the levers 6, 7 then coming into abutment on thetop 12 of the head 2 of the hammer 1. These elastic return means can be of all kinds, springs, rubbers, or even pneumatic or hydraulic cylinders.

On comprend qu'un dispositif selon l'invention présente de nombreux avantages, et notamment :

  • Ce système est indépendant du marteau. On peut donc adapter la tête 2 avec les poignées oscillantes 3, 4 après coup sur des marteaux 1 déjà existants.
It is understood that a device according to the invention has many advantages, and in particular:
  • This system is independent of the hammer. We can therefore adapt the head 2 with theoscillating handles 3, 4 afterwards on hammers 1 already existing.

Le principe de l'articulation sur les pions 8, 9 supprime les frottements pratiquement en totalité.The principle of the articulation on thepins 8, 9 virtually eliminates friction.

On garde les avantages d'un marteau sans suspension, c'est-à-dire que l'on peut faire de la marche à vide pour décoincer les pics.We keep the advantages of a hammer without suspension, that is to say that we can run dry to loosen the peaks.

La disposition croisée des leviers 6 et 7 ayant chacun une grande longueur permet d'obtenir le plus grand bras de levier possible pour conférer une grande course de suspension aux poignées 3 et 4, tout en faisant varier au minimum leur angle d'orientation.The crossed arrangement of the levers 6 and 7 each having a long length makes it possible to obtain the largest lever arm possible to impart a large suspension stroke to thehandles 3 and 4, while varying their angle of orientation to a minimum.

Claims (3)

EP83420020A1983-02-031983-02-03Percussive tool with swinging handlesExpiredEP0115241B1 (en)

Priority Applications (5)

Application NumberPriority DateFiling DateTitle
DE8383420020TDE3376740D1 (en)1983-02-031983-02-03Percussive tool with swinging handles
AT83420020TATE34531T1 (en)1983-02-031983-02-03 IMPACT TOOL WITH SWINGING HANDLES.
EP83420020AEP0115241B1 (en)1983-02-031983-02-03Percussive tool with swinging handles
ES525819AES8502015A1 (en)1983-02-031983-09-22Percussive tool with swinging handles.
US06/553,409US4576241A (en)1983-02-031983-11-21Tool assembly and handle assembly therefor

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
EP83420020AEP0115241B1 (en)1983-02-031983-02-03Percussive tool with swinging handles

Publications (2)

Publication NumberPublication Date
EP0115241A1 EP0115241A1 (en)1984-08-08
EP0115241B1true EP0115241B1 (en)1988-05-25

Family

ID=8191477

Family Applications (1)

Application NumberTitlePriority DateFiling Date
EP83420020AExpiredEP0115241B1 (en)1983-02-031983-02-03Percussive tool with swinging handles

Country Status (5)

CountryLink
US (1)US4576241A (en)
EP (1)EP0115241B1 (en)
AT (1)ATE34531T1 (en)
DE (1)DE3376740D1 (en)
ES (1)ES8502015A1 (en)

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SE504957C2 (en)*1994-02-281997-06-02Berema Atlas Copco Ab Machine skewer with handle fitted back piece
USRE38952E1 (en)1994-03-082006-01-31Hale Nathan SHeat activated ink jet ink
SE506083C2 (en)*1995-07-061997-11-10Berema Atlas Copco Ab Pneumatic impact tool
EP1166971A3 (en)*2000-06-272004-01-02Framatome Connectors InternationalDampening system for tool handles
DE10136015A1 (en)*2001-07-242003-02-13Bosch Gmbh RobertHand-held machine tool has vibration-dampened hand grip of two legs with levers hinged top hand grip legs and machine housing
GB2402098B (en)*2003-05-212007-10-17Black & Decker IncVibration reduction apparatus for power tool and power tool incorporating such apparatus
DE102004041219A1 (en)*2004-08-262006-03-02Robert Bosch Gmbh Hand machine tool grip device with a vibration shielding unit
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DE102005046432A1 (en)*2005-09-282007-03-29Robert Bosch GmbhElectrical machine tool e.g. grinding device, has grip unit, swivelably formed about swivel axis at pivotal point, including vibration damping device, where axis is arranged parallel to longitudinal extension of grip frame of grip unit
US7676890B2 (en)*2005-10-252010-03-16Black And Decker, Inc.Vibration dampening handle for a powered apparatus
DE102005000207A1 (en)*2005-12-232007-06-28Hilti AgHand-held power tool e.g. pneumatic chisel, has handle suspensions arranged in housing in such way that suspensions do not cause additional constructional length, and rings provided between pivot axes and suspensions, respectively
DE102006016442A1 (en)*2006-04-072007-10-11Robert Bosch Gmbh Hand tool with vibration-damped handle
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DE102006052807A1 (en)*2006-11-092008-05-15Robert Bosch Gmbh Hand tool with a vibration-damped strap handle
US20080245197A1 (en)*2007-04-032008-10-09The Boeing CompanySystem and method for dampening vibration of a tool
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EP3766639A1 (en)*2019-07-182021-01-20Hilti AktiengesellschaftHandheld machine tool
EP3822031A1 (en)*2019-11-142021-05-19Hilti AktiengesellschaftMethod for controlling and regulating a machine tool
EP3822035A1 (en)*2019-11-142021-05-19Hilti AktiengesellschaftHandle device for a machine tool
WO2021215214A1 (en)*2020-04-242021-10-28工機ホールディングス株式会社Work machine
US12275125B2 (en)*2023-03-222025-04-15City University Of Hong KongVibration suppression split handle structures for high-vibration handheld

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Also Published As

Publication numberPublication date
ES525819A0 (en)1985-01-01
ES8502015A1 (en)1985-01-01
US4576241A (en)1986-03-18
EP0115241A1 (en)1984-08-08
DE3376740D1 (en)1988-06-30
ATE34531T1 (en)1988-06-15

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