EP1097272A1 - Ramming device comprising a vibration reducing guide cylinder - Google Patents

Ramming device comprising a vibration reducing guide cylinder

Info

Publication number
EP1097272A1
EP1097272A1 EP99934621A EP99934621A EP1097272A1 EP 1097272 A1 EP1097272 A1 EP 1097272A1 EP 99934621 A EP99934621 A EP 99934621A EP 99934621 A EP99934621 A EP 99934621A EP 1097272 A1 EP1097272 A1 EP 1097272A1
Authority
EP
European Patent Office
Prior art keywords
guide cylinder
housing
tool according
elastic elements
mass
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
EP99934621A
Other languages
German (de)
French (fr)
Other versions
EP1097272B1 (en
Inventor
Martin Greppmair
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.)
Wacker Construction Equipment AG
Original Assignee
Wacker Werke GmbH and Co KG
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 Wacker Werke GmbH and Co KG filed Critical Wacker Werke GmbH and Co KG
Publication of EP1097272A1 publication Critical patent/EP1097272A1/en
Application granted granted Critical
Publication of EP1097272B1 publication Critical patent/EP1097272B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/068—Vibrating apparatus operating with systems involving reciprocating masses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18208—Crank, pitman, and slide

Definitions

  • the invention relates to a working device, in particular a ramming device for soil compaction according to the preamble of claim 1.
  • rammers of this type are constructed in such a way that an upper mass, which accommodates a motor and a crank mechanism forming a motion-converting device, has a spring set with an essentially one working or. Compaction plate forming work mass is connected. The rotary motion generated by the engine is converted into an oscillating axial motion by the crank mechanism, which is transferred to the worktop for soil compaction via the spring set.
  • Fig. 6 shows one such, e.g. known from the US-PS 3 090 286 rammer.
  • a crank disk 4 which is mounted in a tamper housing 3 and provided with external teeth, via a pinion 2.
  • a crank pin 5 is attached, on which a connecting rod 6 is rotatably mounted.
  • the connecting rod 6 is rotatably connected at its other end to a guide piston 8 by means of a piston pin 7.
  • the guide piston 8 with a piston guide 9 attached to it can be moved axially back and forth within a guide tube 10 belonging to the lower mass in a guide cylinder 11. This axial direction corresponds to a vertical or working direction of the device during its use.
  • a spring set 12 consisting of one or more springs is arranged on both sides of the piston guide 9, the springs being supported on their sides facing away from the piston guide 9 against spring plates 13 fastened to the guide tube 10.
  • the guide tube 10 and the spring plates 13 belong to the working or undersize of the rammer.
  • a ramming foot not shown in FIG. 6, can be attached to the lower mass, which serves for soil compaction.
  • the top mass and the lower mass connected by an elastic bellows 14.
  • the guide cylinder 11 guiding the guide tube 10 is rigidly connected to the housing 3 by means of screws 15.
  • the bumps are transferred from the ramming plate to the guide tube and the guide cylinder to the upper mass. This not only affects a uniform vibration acceleration of the upper mass, but can also increase the durability of the parts installed in the upper mass, e.g. bearings, gears and motor. In addition, the impact bumps also have a negative effect on the handle cushioning.
  • the invention is based on the object of specifying a working device in which the transfer of bumping impacts occurring on the ramming plate to the upper mass is effectively restricted.
  • a working device in particular a ramming device for soil compaction or a hammer, with an upper mass which has a drive arranged in or on a housing, with a working mass which can be linearly driven back and forth by the drive via a movement converting device and a spring set and with a guide device fastened to the housing and having a guide cylinder guiding the working mass linearly relative to the housing, characterized in that the guide cylinder is fastened to the housing with elastic mobility.
  • the elastic mobility of the guide cylinder relative to the housing belonging to the upper mass enables effective damping of the impact shocks occurring on the working mass, in particular the shocks which do not act in the vertical direction.
  • the guide cylinder also belongs to the upper mass; However, according to the invention, it is decoupled from the rest of the upper mass in order to enable effective reduction of force peaks.
  • one or more elastic elements are inserted between the housing and the guide cylinder.
  • the desired elastic mobility between the guide cylinder and the housing can be easily achieved by suitable selection of the elastic elements. It should be noted that the elements must on the one hand have the required elasticity and a corresponding possible deformation path, but on the other hand the guide cylinder must still be rigidly connected to the housing in order to ensure the functioning of the implement.
  • another embodiment can also be advantageous in which the guide cylinder is made of plastic and is connected directly to the housing without the interposition of elastic elements.
  • the guide cylinder is made of plastic and is connected directly to the housing without the interposition of elastic elements.
  • the guide cylinder is held on the housing by means of a clamping ring.
  • the clamping ring enables the elastic elements to be interposed in a simple manner or to directly hold the fastening flange of a guide cylinder made of plastic.
  • Fig. 1 is a partial sectional view of a first embodiment of the
  • Fig. 3 is a partial sectional view of a third embodiment of the invention.
  • Fig. 4 is a partial sectional view of a fourth embodiment of the invention.
  • Fig. 5 is a partial sectional view of a fifth embodiment of the invention.
  • Fig. 6 is a partial sectional view of a known ramming device.
  • the ramming devices according to the invention from FIGS. 1 to 5 are characterized in that a guide cylinder is elastically movable relative to a housing.
  • a guide cylinder 20 can be seen on which a mounting flange 21 is formed.
  • So-called O or round cord rings which serve as elastic elements 23, lie on the end faces of the fastening flange 21 which serve as fastening surfaces 22.
  • the fastening surfaces 22 thus form contact surfaces with the elastic elements 23.
  • the elastic elements 23 can completely surround the guide cylinder 20 with a constant radius. However, they can also be distributed as individual buffers on the circumference of the guide cylinder 20. Some of the elastic elements 23 abut against a stop surface 24 belonging to the housing 3, while another part of the elastic elements 23 are engaged behind by a clamping ring 25 screwed to the housing 3 and serving as a fastening device.
  • FIG. 2 shows another embodiment of the invention, in which, in addition to the solution from FIG. 1, the clamping ring 25 has an extension 26 which surrounds a further elastic element 27 and presses against the guide cylinder 20.
  • This variant enables an even stiffer connection between the guide cylinder 20 and the housing 3 while maintaining the elasticity properties, as a result of which the guide cylinder 20 can be prevented from bending too strongly relative to the housing 3.
  • FIG. 3 shows a third embodiment of the invention, in which the fastening flange 21 known from FIG. 1 has been divided into two mutually independent fastening flanges 28, 29, each of the fastening flanges 28, 29 being supported against elastic elements 23 in one direction only.
  • This solution also corresponds in principle to the first embodiment according to FIG. 1. However, it opens up the possibility of increasing the distance between the fastening flanges 28 and 29 as desired in order to increase the rigidity of the connection between the guide cylinder 20 and the housing 3.
  • FIG. 5 A fifth embodiment is shown in FIG. 5.
  • the tamper shown there has a guide cylinder 33 made of a plastic material.
  • the plastic is already so elastic that the desired elastic mobility can be achieved with an otherwise rigid connection between the guide cylinder 33 and the housing 3.
  • the guide cylinder 33 analogous to the fourth embodiment according to FIG. 4 — has two fastening flanges 34, 35, which should not be too close apart.
  • recesses 36 can be formed in the fastening surfaces of the fastening flanges 34, 35, which reduce the effective fastening surfaces and thus increase the local surface pressure, at the same time increasing the elasticity within the fastening surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Agronomy & Crop Science (AREA)
  • Civil Engineering (AREA)
  • Soil Sciences (AREA)
  • Road Paving Machines (AREA)
  • Soil Working Implements (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Fluid-Damping Devices (AREA)
  • Vibration Prevention Devices (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

A working device, especially a ramming device for compacting soil, comprises a housing which belongs to an upper mass, and has a working mass which can be linearly driven back and forth with regard to the upper mass. The working mass is linearly guided via a guide cylinder which is fastened to the housing with elastic mobility. The transfer of bounce impacts acting upon the working mass to the upper mass can be effectively reduced by the elastic mobility of the guide cylinder with regard to the housing.

Description

Stampfgerät mit schwingungsgedämpftem Führungszylinder Pounding device with vibration-damped guide cylinder
Die Erfindung betrifft ein Arbeitsgerät, insbesondere ein Stampfgerät zur Bodenverdichtung gemäß dem Oberbegriff von Patentanspruch 1.The invention relates to a working device, in particular a ramming device for soil compaction according to the preamble of claim 1.
Bekannte Stampfer dieser Art sind so aufgebaut, daß eine einen Motor und einen eine Bewegungswandeleinrichtung bildenden Kurbeltrieb aufnehmende Obermasse über einen Federsatz mit einer im wesentlichen eine Arbeitsbzw. Verdichtungsplatte bildenden Arbeitsmasse verbunden ist. Die vom Mo- tor erzeugte Drehbewegung wird durch den Kurbeltrieb in eine oszillierende Axialbewegung gewandelt, die über den Federsatz auf die Arbeitsplatte zur Bodenverdichtung übertragen wird.Known rammers of this type are constructed in such a way that an upper mass, which accommodates a motor and a crank mechanism forming a motion-converting device, has a spring set with an essentially one working or. Compaction plate forming work mass is connected. The rotary motion generated by the engine is converted into an oscillating axial motion by the crank mechanism, which is transferred to the worktop for soil compaction via the spring set.
Fig. 6 zeigt einen derartigen, z.B. aus der US-PS 3 090 286 bekannten Stampfer.Fig. 6 shows one such, e.g. known from the US-PS 3 090 286 rammer.
Gemäß Fig. 6 wird von einem nicht dargestellten Motor einer Antriebswelle 1 des Stampfers angetrieben, die über ein Ritzel 2 eine in einem Stampfergehäuse 3 gelagerte und mit einer Außenverzahnung versehene Kurbelscheibe 4 antreibt. An der Kurbelscheibe 4 ist ein Hubzapfen 5 angebracht, auf den ein Pleuel 6 drehbeweglich aufgesetzt ist. Das Pleuel 6 ist an seinem anderen Ende mittels eines Kolbenbolzens 7 drehbeweglich mit einem Führungskolben 8 verbunden. Der Führungskolben 8 ist mit einer an ihm befestigten Kolbenführung 9 innerhalb eines zur Untermasse gehörenden Führungs- rohrs 10 in einem Führungszylinder 1 1 axial hin- und herbeweglich. Diese Axialrichtung entspricht einer Vertikal- bzw. Arbeitsrichtung des Geräts während seines Einsatzes.6 is driven by a motor, not shown, of a drive shaft 1 of the rammer, which drives a crank disk 4, which is mounted in a tamper housing 3 and provided with external teeth, via a pinion 2. On the crank disk 4, a crank pin 5 is attached, on which a connecting rod 6 is rotatably mounted. The connecting rod 6 is rotatably connected at its other end to a guide piston 8 by means of a piston pin 7. The guide piston 8 with a piston guide 9 attached to it can be moved axially back and forth within a guide tube 10 belonging to the lower mass in a guide cylinder 11. This axial direction corresponds to a vertical or working direction of the device during its use.
Auf beiden Seiten der Kolbenführung 9 ist ein aus einer oder mehreren Fe- dem bestehender Federsatz 12 angeordnet, wobei die Federn jeweils auf ihren von der Kolbenführung 9 abgewandten Seiten gegen am Führungsrohr 10 befestigte Federplatten 13 abgestützt sind.A spring set 12 consisting of one or more springs is arranged on both sides of the piston guide 9, the springs being supported on their sides facing away from the piston guide 9 against spring plates 13 fastened to the guide tube 10.
Das Führungsrohr 10 und die Federplatten 13 gehören zur Arbeits- bzw. Untermasse des Stampfers. An der Untermasse kann ein in Fig. 6 nicht gezeigter Stampffuß angebracht werden, der zur Bodenverdichtung dient. Um das Eindringen von Feuchtigkeit und Schmutz zu vermeiden, sind die Ober- masse und die Untermasse durch einen elastischen Balg 14 verbunden.The guide tube 10 and the spring plates 13 belong to the working or undersize of the rammer. A ramming foot, not shown in FIG. 6, can be attached to the lower mass, which serves for soil compaction. To prevent the ingress of moisture and dirt, the top mass and the lower mass connected by an elastic bellows 14.
Der das Führungsrohr 10 führende Führungszylinder 1 1 ist mittels Schrauben 15 starr mit dem Gehäuse 3 verbunden.The guide cylinder 11 guiding the guide tube 10 is rigidly connected to the housing 3 by means of screws 15.
Im Stampfbetrieb treten außer den durch die Massebeschleunigung im Stampfsystem hervorgerufenen Schwingungen durch den Aufschlag der Stampfplatte auf den Boden - insbesondere bei sehr hartem, steinigem Boden - am Stampfer hohe Prellschläge auf. Dieses Problem wird bei relativ breiten Stampfplatten und die dadurch hervorgerufenen häufigen Schräglagen bzw. durch schräg auf die Stampfplatte wirkende Kräfte noch verstärkt.In ramming operation, in addition to the vibrations caused by the acceleration of mass in the ramming system, the impact of the ramming plate on the ground - particularly in the case of very hard, stony ground - results in high bumps on the rammer. This problem is exacerbated in the case of relatively wide ramming plates and the frequent inclined positions caused thereby or by forces acting obliquely on the ramming plate.
Die Prellschläge werden von der Stampfplatte auf das Führungsrohr und den Führungszylinder auf die Obermasse übertragen. Sie beeinträchtigen da- durch nicht nur eine gleichmäßige Schwingungsbeschleunigung der Obermasse, sondern können auch die Dauerhaltbarkeit der in der Obermasse eingebauten Teile, z.B. der Lager, der Verzahnungen und des Motors, erheblich beeinträchtigen. Zudem wirken sich die Prellschläge auch hinsichtlich der Handgriffabfederung negativ aus.The bumps are transferred from the ramming plate to the guide tube and the guide cylinder to the upper mass. This not only affects a uniform vibration acceleration of the upper mass, but can also increase the durability of the parts installed in the upper mass, e.g. bearings, gears and motor. In addition, the impact bumps also have a negative effect on the handle cushioning.
Der Erfindung liegt die Aufgabe zugrunde, ein Arbeitsgerät anzugeben, bei dem ein Übertragen von an der Stampfplatte entstehenden Prellschlägen auf die Obermasse wirksam eingeschränkt ist.The invention is based on the object of specifying a working device in which the transfer of bumping impacts occurring on the ramming plate to the upper mass is effectively restricted.
Erfindungsgemäß wird die Lösung durch ein Arbeitsgerät mit den Merkmalen von Patentanspruch 1 angegeben. Vorteilhafte Weiterentwicklungen der Erfindung sind den abhängigen Ansprüchen zu entnehmen.According to the invention, the solution is given by a working device with the features of claim 1. Advantageous further developments of the invention can be found in the dependent claims.
Erfindungsgemäß ist ein Arbeitsgerät, insbesondere ein Stampfgerät zur Bo- denverdichtung oder ein Hammer, mit einer Obermasse, die einen in oder an einem Gehäuse angeordneten Antrieb aufweist, mit einer durch den Antrieb über eine Bewegungswandeleinrichtung und einen Federsatz linear hin- und hertreibbaren Arbeitsmasse und mit einer an dem Gehäuse befestigten Führungseinrichtung, die einen die Arbeitsmasse relativ zu dem Gehäuse linear führenden Führungszylinder aufweist, dadurch gekennzeichnet, daß der Führungszylinder mit elastischer Beweglichkeit an dem Gehäuse befestigt ist. Die elastische Beweglichkeit des Führungszylinders relativ zu dem zur Obermasse gehörenden Gehäuse ermöglicht eine wirksame Dämpfung der an der Arbeitsmasse auftretenden Prellschläge, insbesondere der nicht in Vertikalrichtung wirkenden Schläge. Schwingungstechnisch gesehen gehört zwar auch der Führungszylinder zur Obermasse; er wird jedoch erfindungsgemäß von der restlichen Obermasse entkoppelt, um einen wirksamen Abbau von Kraftspitzen zu ermöglichen.According to the invention, a working device, in particular a ramming device for soil compaction or a hammer, with an upper mass which has a drive arranged in or on a housing, with a working mass which can be linearly driven back and forth by the drive via a movement converting device and a spring set and with a guide device fastened to the housing and having a guide cylinder guiding the working mass linearly relative to the housing, characterized in that the guide cylinder is fastened to the housing with elastic mobility. The elastic mobility of the guide cylinder relative to the housing belonging to the upper mass enables effective damping of the impact shocks occurring on the working mass, in particular the shocks which do not act in the vertical direction. From a vibration point of view, the guide cylinder also belongs to the upper mass; However, according to the invention, it is decoupled from the rest of the upper mass in order to enable effective reduction of force peaks.
Bei einer besonders vorteilhaften Ausführungsform der Erfindung sind zwi- sehen dem Gehäuse und dem Führungszylinder ein oder mehrere elastische Elemente eingesetzt. Durch geeignete Auswahl der elastischen Elemente kann die gewünschte elastische Beweglichkeit zwischen Führungszylinder und Gehäuse einfach erreicht werden. Dabei ist zu beachten, daß die Elemente zwar einerseits die erforderliche Elastizität und einen entsprechenden möglichen Verformungsweg mit sich bringen müssen, andererseits aber muß der Führungszylinder nach wie vor steif mit dem Gehäuse verbunden sein, um ein Funktionieren des Arbeitsgeräts zu gewährleisten.In a particularly advantageous embodiment of the invention, one or more elastic elements are inserted between the housing and the guide cylinder. The desired elastic mobility between the guide cylinder and the housing can be easily achieved by suitable selection of the elastic elements. It should be noted that the elements must on the one hand have the required elasticity and a corresponding possible deformation path, but on the other hand the guide cylinder must still be rigidly connected to the housing in order to ensure the functioning of the implement.
Daher kann auch eine andere Ausführungsform vorteilhaft sein, bei der der Führungszylinder aus Kunststoff besteht und ohne Zwischenlegen von elastischen Elementen direkt mit dem Gehäuse verbunden ist. Bei entsprechender Ausgestaltung eines am Führungszylinder vorgesehenen Befestigungsflansches wird die erforderliche Elastizität bereits durch das Kunststoffmaterial erreicht.Therefore, another embodiment can also be advantageous in which the guide cylinder is made of plastic and is connected directly to the housing without the interposition of elastic elements. With a corresponding design of a fastening flange provided on the guide cylinder, the required elasticity is already achieved by the plastic material.
Bei einer besonders vorteilhaften Ausführungsform der Erfindung wird der Führungszylinder mittels eines Spannrings am Gehäuse festgehalten. Der Spannring ermöglicht es, die elastischen Elemente in einfacher Weise zwischenzulegen oder direkt den Befestigungsflansch eines aus Kunststoff be- stehenden Führungszylinders zu halten.In a particularly advantageous embodiment of the invention, the guide cylinder is held on the housing by means of a clamping ring. The clamping ring enables the elastic elements to be interposed in a simple manner or to directly hold the fastening flange of a guide cylinder made of plastic.
Diese und weitere Vorteile und Merkmale der Erfindung werden nachfolgend unter Zuhilfenahme der begleitenden Figuren näher erläutert. Es zeigen:These and other advantages and features of the invention are explained in more detail below with the aid of the accompanying figures. Show it:
Fig. 1 eine Teilschnittdarstellung einer ersten Ausführungsform derFig. 1 is a partial sectional view of a first embodiment of the
Erfindung; Fig. 2 eine Teilschnittdarstellung einer zweiten Ausführungsform der Erfindung;Invention; 2 is a partial sectional view of a second embodiment of the invention;
Fig. 3 eine Teilschnittdarstellung einer dritten Ausführungsform der Erfindung;Fig. 3 is a partial sectional view of a third embodiment of the invention;
Fig. 4 eine Teilschnittdarstellung einer vierten Ausführungsform der Erfindung;Fig. 4 is a partial sectional view of a fourth embodiment of the invention;
Fig. 5 eine Teilschnittdarstellung einer fünften Ausführungsform der Erfindung;Fig. 5 is a partial sectional view of a fifth embodiment of the invention;
Fig. 6 eine Teilschnittdarstellung eines bekannten Stampfgeräts.Fig. 6 is a partial sectional view of a known ramming device.
Die Fig. 1 bis 5 zeigen in Teilschnittdarstellung verschiedene Ausführungsformen der Erfindung. Soweit die Bauteile bereits anhand des bekannten Stampfgeräts nach Fig. 6 beschrieben worden sind, wird auf eine erneute Beschreibung verzichtet. Die Funktionsweise aller dargestellten Stampfgeräte ist identisch.1 to 5 show various embodiments of the invention in a partial sectional view. Insofar as the components have already been described with reference to the known ramming device according to FIG. 6, the description is not repeated. The functioning of all the ramming devices shown is identical.
Die erfindungsgemäßen Stampfgeräte aus den Fig. 1 bis 5 zeichnen sich dadurch aus, daß ein Führungszylinder relativ zu einem Gehäuse elastisch beweglich ist.The ramming devices according to the invention from FIGS. 1 to 5 are characterized in that a guide cylinder is elastically movable relative to a housing.
In Fig. 1 ist ein Führungszylinder 20 zu sehen, an dem ein Befestigungsflansch 21 ausgebildet ist.In Fig. 1, a guide cylinder 20 can be seen on which a mounting flange 21 is formed.
An den als Befestigungsflächen 22 dienenden Stirnseiten des Befestigungsflansches 21 liegen sogenannte O- oder Rundschnurringe an, die als elasti- sehe Elemente 23 dienen. Die Befestigungsflächen 22 bilden somit Berührflächen mit den elastischen Elementen 23. Die elastischen Elemente 23 können den Führungszylinder 20 mit konstantem Radius vollständig umgeben. Sie können aber auch als einzelne Puffer am Umfang des Führungszylinders 20 verteilt sein. Ein Teil der elastischen Elemente 23 liegt an einer zum Ge- häuse 3 gehörenden Anschlagfläche 24 an, während ein anderer Teil der elastischen Elemente 23 durch einen mit dem Gehäuse 3 verschraubten und als Befestigungseinrichtung dienenden Spannring 25 hintergriffen werden. Durch das Befestigen des Spannrings 25 am Gehäuse 3 werden die elastischen Elemente 23 mit dem Befestigungsflansch 21 und dem Führungszylinder 20 fest mit dem Gehäuse 3 verbunden, wobei trotzdem eine gewisse elastische Beweglichkeit zwischen dem Führungszylinder 20 und dem Gehäuse 3 bestehen bleibt. Diese Elastizität ist dazu geeignet, um durch Prellschläge hervorgerufene Kraftspitzen abzubauen und dadurch die Obermasse vor Schlägen wirksam zu schützen.So-called O or round cord rings, which serve as elastic elements 23, lie on the end faces of the fastening flange 21 which serve as fastening surfaces 22. The fastening surfaces 22 thus form contact surfaces with the elastic elements 23. The elastic elements 23 can completely surround the guide cylinder 20 with a constant radius. However, they can also be distributed as individual buffers on the circumference of the guide cylinder 20. Some of the elastic elements 23 abut against a stop surface 24 belonging to the housing 3, while another part of the elastic elements 23 are engaged behind by a clamping ring 25 screwed to the housing 3 and serving as a fastening device. By fastening the clamping ring 25 to the housing 3, the elastic elements 23 with the fastening flange 21 and the guide cylinder 20 are firmly connected to the housing 3, with a certain elastic mobility still remaining between the guide cylinder 20 and the housing 3. This elasticity is suitable for reducing force peaks caused by bumping and thereby effectively protecting the upper mass from impacts.
Fig. 2 zeigt eine andere Ausführungsform der Erfindung, bei der zusätzlich zu der Lösung aus Fig. 1 der Spannring 25 einen Fortsatz 26 aufweist, der ein weiteres elastisches Element 27 umschließt und gegen den Führungszylinder 20 drückt.FIG. 2 shows another embodiment of the invention, in which, in addition to the solution from FIG. 1, the clamping ring 25 has an extension 26 which surrounds a further elastic element 27 and presses against the guide cylinder 20.
Diese Variante ermöglicht unter Beibehaltung der Elastizitätseigenschaften eine noch steifere Verbindung zwischen dem Führungszylinder 20 und dem Gehäuse 3, wodurch ein zu starkes seitliches Abknicken des Führungszylinders 20 gegenüber dem Gehäuse 3 vermieden werden kann.This variant enables an even stiffer connection between the guide cylinder 20 and the housing 3 while maintaining the elasticity properties, as a result of which the guide cylinder 20 can be prevented from bending too strongly relative to the housing 3.
Fig. 3 zeigt eine dritte Ausführungsform der Erfindung, bei der der aus Fig. l bekannte Befestigungsflansch 21 in zwei voneinander unabhängige Befestigungsflansche 28, 29 aufgeteilt worden ist, wobei jeder der Befestigungsflansche 28, 29 sich nur in einer Richtung gegen elastische Elemente 23 abstützt.FIG. 3 shows a third embodiment of the invention, in which the fastening flange 21 known from FIG. 1 has been divided into two mutually independent fastening flanges 28, 29, each of the fastening flanges 28, 29 being supported against elastic elements 23 in one direction only.
Auch diese Lösung entspricht im Prinzip der ersten Ausführungsform gemäß Fig. 1. Sie eröffnet jedoch die Möglichkeit, den Abstand zwischen den Befestigungsflanschen 28 und 29 beliebig zu vergrößern, um die Steifigkeit der Verbindung zwischen dem Führungszylinder 20 und dem Gehäuse 3 zu vergrößern.This solution also corresponds in principle to the first embodiment according to FIG. 1. However, it opens up the possibility of increasing the distance between the fastening flanges 28 and 29 as desired in order to increase the rigidity of the connection between the guide cylinder 20 and the housing 3.
Diese Idee wird bei der vierten Ausführungsform der Erfindung gemäß Fig. 4 weiterentwickelt, bei der zwei weit auseinandergezogene Befestigungsflansche 30, 31 zu erkennen sind. Durch diese Anordnung lassen sich bei den bisher beschriebenen Ausführungsbeispielen möglicherweise bei extremen Belastungen auftretende seitliche Ausknickungen verhindern. In der vierten Ausführungsform gemäß Fig. 4 werden weiterhin statt der bisher gezeigten Rundschnurringe 23 elastische Elemente 32 gezeigt, die als gesondert anzufertigende Gummiformteile speziell für den Anwendungszweck angepaßt worden sind. Bei der in Fig. 4 gezeigten Ausführungsform decken die elastischen Elemente 32 nicht nur die Befestigungsflächen der Befestigungflansche 30, 31 ab, sondern auch die Umfangsflächen, wodurch insbesondere seitliche Stöße besser abgefangen werden können.This idea is further developed in the fourth embodiment of the invention according to FIG. 4, in which two widely spread fastening flanges 30, 31 can be seen. This arrangement makes it possible to prevent lateral buckling that may occur under extreme loads in the exemplary embodiments described so far. In the fourth embodiment according to FIG. 4, instead of the round cord rings 23 shown so far, elastic elements 32 are shown which have been specially adapted as molded rubber parts for the intended use. In the embodiment shown in FIG. 4, the elastic elements 32 cover not only the fastening surfaces of the fastening flanges 30, 31, but also the peripheral surfaces, as a result of which lateral impacts in particular can be better absorbed.
Eine fünfte Ausführungsform ist in Fig. 5 dargestellt.A fifth embodiment is shown in FIG. 5.
Der dort gezeigte Stampfer weist einen Führungszylinder 33 aus einem Kunststoffmaterial auf. Der Kunststoff ist bereits so elastisch, daß bei einer ansonsten starren Verbindung zwischen dem Führungzylinder 33 und dem Gehäuse 3 die gewünschte elastische Beweglichkeit erreicht werden kann. Dazu weist der Führungszylinder 33 - analog zu der vierten Ausführungsform gemäß Fig. 4 - zwei Befestigungsflansche 34, 35 auf, die einen nicht zu geringen Abstand voneinander haben sollten.The tamper shown there has a guide cylinder 33 made of a plastic material. The plastic is already so elastic that the desired elastic mobility can be achieved with an otherwise rigid connection between the guide cylinder 33 and the housing 3. For this purpose, the guide cylinder 33 — analogous to the fourth embodiment according to FIG. 4 — has two fastening flanges 34, 35, which should not be too close apart.
Zur Erhöhung der Elastizität können in den Befestigungsflächen der Befesti- gungsflansche 34, 35 Ausnehmungen 36 ausgebildet sein, die die wirksamen Befestigungsflächen verringern und somit die lokale Flächenpressung erhöhen, wobei gleichzeitig innerhalb der Befestigungsflächen eine Erhöhung der Elastizität erreicht wird.To increase the elasticity, recesses 36 can be formed in the fastening surfaces of the fastening flanges 34, 35, which reduce the effective fastening surfaces and thus increase the local surface pressure, at the same time increasing the elasticity within the fastening surfaces.
Neben der vorteilhaften Wirkung des Führungszylinders 33 hinsichtlich der Dämpfung von Prellschlägen ergeben sich auch deutliche Gewichtsvorteile. Darüber hinaus ist die Herstellung eines derartigen Kunststoffteils einfacher als die Herstellung eines vergleichbaren Teiles aus Metall. In addition to the advantageous effect of the guide cylinder 33 with regard to the damping of bumps, there are also significant weight advantages. In addition, the production of such a plastic part is easier than the production of a comparable part made of metal.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Arbeitsgerät, insbesondere Stampfgerät zur Bodenverdichtung oder Hammer, mit - einer Obermasse, die einen in oder an einem Gehäuse (3) angeordneten Antrieb aufweist; einer durch den Antrieb über eine Bewegungswandeleinrichtung und einen Federsatz ( 12) linear hin- und hertreibbaren Arbeitsmasse; und mit einer an dem Gehäuse (3) befestigten Führungseinrichtung, die einen die Arbeitsmasse relativ zu dem Gehäuse linear führenden Führungszylinder (20; 33) aufweist; dadurch gekennzeichnet, daß der Führungszylinder (20; 33) mit elastischer Beweglichkeit an dem Gehäuse (3) befestigt ist.1. Tool, in particular ramming device for soil compaction or hammer, with - an upper mass which has a drive arranged in or on a housing (3); a working mass which can be driven linearly back and forth by the drive via a movement conversion device and a spring set (12); and with a guide device fastened to the housing (3) and having a guide cylinder (20; 33) which guides the working mass linearly relative to the housing; characterized in that the guide cylinder (20; 33) is fastened to the housing (3) with elastic mobility.
2. Arbeitsgerät nach Anspruch 1 , dadurch gekennzeichnet, daß zwischen dem Gehäuse (3) und dem Führungszylinder (20; 33) ein oder mehrere elastische Elemente (23; 27; 32) eingesetzt sind.2. Tool according to claim 1, characterized in that between the housing (3) and the guide cylinder (20; 33) one or more elastic elements (23; 27; 32) are used.
3. Arbeitsgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Führungseinrichtung eine Befestigungseinrichtung (25) aufweist, die den Führungszylinder (20; 33) am Gehäuse befestigt.3. Tool according to claim 1 or 2, characterized in that the guide device has a fastening device (25) which fastens the guide cylinder (20; 33) to the housing.
4. Arbeitsgerät nach Anspruch 3, dadurch gekennzeichnet, daß zwischen dem Führungszylinder (20) und der Befestigungseinrichtung (25) ein oder mehrere elastische Elemente (23; 32) eingesetzt sind.4. Tool according to claim 3, characterized in that one or more elastic elements (23; 32) are used between the guide cylinder (20) and the fastening device (25).
5. Arbeitsgerät nach Anspruch 2 oder 4, dadurch gekennzeichnet, daß das oder die elastischen Elemente (23; 32) aus einem gummielastischen Material oder aus Kunststoff bestehen.5. Tool according to claim 2 or 4, characterized in that the or the elastic elements (23; 32) consist of a rubber-elastic material or plastic.
6. Arbeitsgerät nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß der Führungszylinder (20; 33) wenigstens eine sich im wesentlichen parallel zu einer am Gehäuse (3) vorgesehenen Anschlagfläche (24) erstreckende Berührfläche (22) mit einem der elastischen Elemente (23; 32) aufweist. 7 Arbeitsgerät nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß der Führungszylinder (20) wenigstens eine sich im wesentlichen senkrecht zu einer am Gehäuse (3) vorgesehenen Anschlagfläche (24) erstreckende Berührfläche mit einem der elastischen Elemente (27) auf- weist.6. Tool according to one of claims 2 to 5, characterized in that the guide cylinder (20; 33) at least one substantially parallel to an on the housing (3) provided stop surface (24) extending contact surface (22) with one of the elastic elements (23; 32). 7 Tool according to one of claims 2 to 6, characterized in that the guide cylinder (20) has at least one contact surface extending substantially perpendicular to a stop surface (24) provided on the housing (3) with one of the elastic elements (27) .
8 Arbeitsgerät nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Führungszylinder (20; 33) eine sich im wesentlichen parallel zu einer am Gehäuse (3) vorgesehenen Anschlagfläche (24) erstreckende Befestigungsfläche (35) aufweist, die von der Befestigungseinrichtung (25) hintergriffen wird.8 Tool according to one of the preceding claims, characterized in that the guide cylinder (20; 33) has a fastening surface (35) which extends essentially parallel to a stop surface (24) provided on the housing (3) and which is supported by the fastening device (25). is attacked.
9 Arbeitsgerät nach Anspruch 8, dadurch gekennzeichnet daß die Befestigungsfläche (34, 35) elastische Eigenschaften aufweist9 Tool according to claim 8, characterized in that the fastening surface (34, 35) has elastic properties
10 Arbeitsgerät nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Befestigungseinπchtung einen Spannring (25) umfaßt.10 Tool according to one of the preceding claims, characterized in that the Befestigungseinπchtung comprises a clamping ring (25).
1 1 Arbeitsgerät nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Führungszylinder (33) aus Kunststoff besteht. 1 1 implement according to one of the preceding claims, characterized in that the guide cylinder (33) consists of plastic.
EP99934621A 1998-07-10 1999-07-07 Ramming device comprising a vibration reducing guide cylinder Expired - Lifetime EP1097272B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19830979 1998-07-10
DE19830979A DE19830979C2 (en) 1998-07-10 1998-07-10 Pounding device with vibration-damped guide cylinder
PCT/EP1999/004782 WO2000003096A1 (en) 1998-07-10 1999-07-07 Ramming device comprising a vibration reducing guide cylinder

Publications (2)

Publication Number Publication Date
EP1097272A1 true EP1097272A1 (en) 2001-05-09
EP1097272B1 EP1097272B1 (en) 2003-01-15

Family

ID=7873639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99934621A Expired - Lifetime EP1097272B1 (en) 1998-07-10 1999-07-07 Ramming device comprising a vibration reducing guide cylinder

Country Status (6)

Country Link
US (1) US6443651B1 (en)
EP (1) EP1097272B1 (en)
JP (1) JP2002520514A (en)
AT (1) ATE231205T1 (en)
DE (2) DE19830979C2 (en)
WO (1) WO2000003096A1 (en)

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EP3712330A1 (en) 2019-03-21 2020-09-23 Wacker Neuson Produktion GmbH & Co. KG Soil compacting device
EP4012100A1 (en) 2020-12-14 2022-06-15 Wacker Neuson Produktion GmbH & Co. KG Soil compacting device for compacting an area of soil
EP4174234A1 (en) 2021-10-29 2023-05-03 Wacker Neuson Produktion GmbH & Co. KG Working machine with a cover unit for covering or opening an opening
DE102021129281A1 (en) 2021-11-10 2023-05-11 Wacker Neuson Produktion GmbH & Co. KG Working machine with a machine element that can be adjusted about a pivot axis

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EP3712330A1 (en) 2019-03-21 2020-09-23 Wacker Neuson Produktion GmbH & Co. KG Soil compacting device
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EP4012100A1 (en) 2020-12-14 2022-06-15 Wacker Neuson Produktion GmbH & Co. KG Soil compacting device for compacting an area of soil
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DE102021128299A1 (en) 2021-10-29 2023-05-04 Wacker Neuson Produktion GmbH & Co. KG Working machine with a cover unit for covering or opening an opening
DE102021129281A1 (en) 2021-11-10 2023-05-11 Wacker Neuson Produktion GmbH & Co. KG Working machine with a machine element that can be adjusted about a pivot axis

Also Published As

Publication number Publication date
JP2002520514A (en) 2002-07-09
WO2000003096A1 (en) 2000-01-20
DE59904052D1 (en) 2003-02-20
DE19830979C2 (en) 2002-10-24
EP1097272B1 (en) 2003-01-15
US6443651B1 (en) 2002-09-03
ATE231205T1 (en) 2003-02-15
DE19830979A1 (en) 2000-01-13

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