EP0707115A2 - Vibrating tamper - Google Patents

Vibrating tamper Download PDF

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Publication number
EP0707115A2
EP0707115A2 EP95110696A EP95110696A EP0707115A2 EP 0707115 A2 EP0707115 A2 EP 0707115A2 EP 95110696 A EP95110696 A EP 95110696A EP 95110696 A EP95110696 A EP 95110696A EP 0707115 A2 EP0707115 A2 EP 0707115A2
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EP
European Patent Office
Prior art keywords
guide bracket
tamper
articulation point
handle
rammer
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
EP95110696A
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German (de)
French (fr)
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EP0707115A3 (en
EP0707115B1 (en
Inventor
Arno Dr.-Ing Zürbes
Helmut Rötsch
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Bomag GmbH and Co OHG
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Bomag GmbH and Co OHG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/12—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses
    • B06B1/14—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses the masses being elastically coupled
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/35—Hand-held or hand-guided tools
    • 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
    • E02D3/061—Tampers with directly acting explosion chambers

Definitions

  • the invention relates to a tamper for soil compaction, which executes approximately vertical vibrations by means of a built-in drive and is to be held by an operator by means of a guide bracket which is articulated elastically on the tamper head and has a handle at the other end, the guide bracket extending beyond its articulation point having.
  • Such rammers are known in numerous design variants and have proven themselves well in the compression of small areas.
  • the guide bracket With the guide bracket, the operator is able to guide the vibrating tamper over the soil surfaces to be compacted with little effort in the desired direction and speed.
  • the extension of the guide bracket opposite the handle end serves as a ram protection or as an additional handle during transport.
  • the vibrations of the rammer are also transmitted to the guide bracket.
  • the operator is therefore more or less often forced to take a break depending on the strength and frequency of the vibration and the quality of the damping element between the guide bracket and the tamper.
  • the object of the present invention is to improve the known rammers in such a way that the guide bracket lies more comfortably in the hand with the same ramming performance of the rammer, so the operator is less stressed and the interruptions in operation can be reduced.
  • the possibility of guiding or controlling the rammer should be fully preserved.
  • the quotient for the aforementioned regularity of the weight distribution between about 0.7 to 1.25, in particular about 0.8 to 1.15, and the position of the articulation point at least about 2 cm, preferably at least about 5 cm, above the imaginary solder starting from the bow handle on the rammer's longitudinal axis.
  • the guide bracket carries a counterweight on its extension projecting beyond the tamper head in order to achieve the desired mass distribution.
  • FIG. 1 shows an essentially conventional vibration rammer 1, the rammer foot 2 of which is approximately vertical by a fuel engine 3 Vibrations.
  • the motor 3 drives an eccentric, not shown, on which in turn a piston rod 4 is mounted, which is braced at its lower end by means of prestressed springs 5 and 6 with the tamper foot.
  • the lower end of the tamper foot is formed by an inclined tamper plate 2a, so that the tamper is inclined slightly forward, in the exemplary embodiment at an angle of approximately 75 °. Its balance is maintained in that both the drive motor 3 and the fuel tank 7 are arranged on the other side of the rammer.
  • the retaining bracket has a specific mass distribution which obeys the law specified above, reference being made to FIG. 2 for an explanation of the individual masses and lever arms mentioned there.
  • the guide bracket 10 is shown there with its articulation point 11, the double arrow below the articulation point indicating the vibrations introduced there. These vibrations are not exactly vertical, but along a complicated curved path. Therefore, the handle end 10a is exposed not only to movements in the vertical direction but also in the horizontal direction. These movements are surprisingly reduced or eliminated by the mass distribution according to the invention.
  • the tamper head 8 which is formed by an attachment 9 (see also FIG. 3). is extended upwards and carries the guide bracket 10 in this raised area.
  • the attachment 9 is angled backwards relative to the tamper's longitudinal axis, that is to say to the operator.
  • the articulation point 11 of the guide bracket 10 on the tamper head is not only extended upwards compared to conventional tamper, but is also displaced in the direction of the operator.
  • the articulation point is therefore above the solder L extending from the handle 10a of the guide bracket 10 onto the ram longitudinal axis A. This position of the articulation point 11 allows the guide bracket 10 to run almost horizontally, which likewise results in a reduction in vibration at the end of the handle.
  • the figures show that the guide bracket 10 is extended forward beyond the articulation point 11 and carries counterweights 12 there. By means of these counterweights, the desired mass distribution can be brought about in a simple manner while the bracket geometry remains the same.
  • FIG. 4 shows an enlarged illustration of the articulation point 11 to clarify the damping installed there between the guide bracket 10 and the tamper head 8.
  • the guide bracket 10 is connected on both sides to a coupling piece 13, which in the exemplary embodiment 4 has outwardly projecting projections.
  • the two middle, upward and downward projections 13a and 13b are embedded in a damping element in the form of a matching rubber-elastic molded part 14, while the other two projections 13c and 13d in the rest position of the guide bracket 10 have little or no contact with this molded part.
  • the shape of the coupling element 13 as well as the rubber-elastic molding 14 can be any. It is only essential that part of the damping surfaces only become effective after a certain deflection of the guide bracket.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Road Paving Machines (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Golf Clubs (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Stored Programmes (AREA)
  • Surgical Instruments (AREA)
  • Cartons (AREA)
  • Closures For Containers (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Cosmetics (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

The connecting point (11) of the handle (10) to the stamper (8) lies above a point which is the crossing point of a given line (L). It runs at right angles to the centreline (A) of the stamper. The extension (10b) of the handle carries a counterweight (12). The division of the masses, over the handle and its extension, is so that the product of the mass of the counterweight times the two lengths (lv, lva) which determine its position, divided by the product of the mass of the stamper times the lengths (lB, lBa), which define its position is 0.6 to 1.5.

Description

Die Erfindung betrifft einen Stampfer zur Bodenverdichtung, der durch einen eingebauten Antrieb etwa vertikale Vibrationen ausführt und dabei durch einen elastisch am Stampferkopf angelenkten und am anderen Ende einen Griff aufweisenden Führungsbügel von einer Bedienungsperson zu halten ist, wobei der Führungsbügel eine über seinen Anlenkpunkt hinaus laufende Verlängerung aufweist.The invention relates to a tamper for soil compaction, which executes approximately vertical vibrations by means of a built-in drive and is to be held by an operator by means of a guide bracket which is articulated elastically on the tamper head and has a handle at the other end, the guide bracket extending beyond its articulation point having.

Derartige Stampfer sind in zahlreichen Ausführungsvarianten bekannt und haben sich bei der Verdichtung kleiner Flächen gut bewährt. Durch den Führungsbügel ist die Bedienungsperson in der Lage, den vibrierenden Stampfer mit geringem Kraftaufwand in der gewünschten Richtung und Geschwindigkeit über die zu verdichtenden Bodenflächen zu führen. Die dem Griffende entgegengesetzte Verlängerung des Führungsbügels dient als Rammschutz oder als zusätzlicher Griff beim Transport.Such rammers are known in numerous design variants and have proven themselves well in the compression of small areas. With the guide bracket, the operator is able to guide the vibrating tamper over the soil surfaces to be compacted with little effort in the desired direction and speed. The extension of the guide bracket opposite the handle end serves as a ram protection or as an additional handle during transport.

Allerdings übertragen sich die Vibrationen des Stampfers auch auf den Führungsbügel. Die Bedienungsperson ist deshalb je nach Stärke und Frequenz der Vibration und in Abhängigkeit von der Qualität des Dämpfungselementes zwischen Führungsbügel und Stampfer mehr oder weniger oft gezwungen, eine Pause einzulegen.However, the vibrations of the rammer are also transmitted to the guide bracket. The operator is therefore more or less often forced to take a break depending on the strength and frequency of the vibration and the quality of the damping element between the guide bracket and the tamper.

Hiervon ausgehend liegt die Aufgabe der vorliegenden Erfindung darin, die bekannten Stampfer dahingehend zu verbessern, daß der Führungsbügel bei gleicher Verdichtungsleistung des Stampfers ruhiger in der Hand liegt, die Bedienungsperson also weniger belastet wird und die Betriebsunterbrechungen reduziert werden können. Dabei soll die Führungs- bzw. Steuerungsmöglichkeit des Stampfers in vollem Umfang gewahrt bleiben.Proceeding from this, the object of the present invention is to improve the known rammers in such a way that the guide bracket lies more comfortably in the hand with the same ramming performance of the rammer, so the operator is less stressed and the interruptions in operation can be reduced. The possibility of guiding or controlling the rammer should be fully preserved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Anlenkpunkt des Führungsbügels am Stampferkopf oberhalb eines vom Griffbereich des Bügels ausgehenden gedachten Lotes auf die Stampfer-Längsachse angeordnet ist und/oder bei am Anlenkpunkt geteilt gedachtem Führungsbügel seine Massenverteilung folgender Gesetzmäßigkeit gehorcht: m V .l V .l VG m B .l B .l BG = 0,6 - 1,5

Figure imgb0001
wobei mV = Masse der Verlängerung nebst Anbauteilen, mB = Masse des vom Anlenkpunkt zum Griff laufenden Führungsbügels nebst Anbauteilen, lV = Abstand zwischen Schwerpunkt von mV und Anlenkpunkt, lB = Abstand zwischen Schwerpunkt von mB und Anlenkpunkt, lVG = Abstand zwischen Schwerpunkt von mV und Griff, lBG = Abstand zwischen Schwerpunkt von mB und Griff.This object is achieved according to the invention in that the articulation point of the guide bracket on the tamper head is arranged above an imaginary solder originating from the handle area of the yoke on the longitudinal axis of the tamper and / or in the case of a guide bracket which is thought to be divided at the articulation point, its mass distribution obeys the following regularity: m V .l V .l VG m B .l B .l BG = 0.6 - 1.5
Figure imgb0001
 where m V = mass of the extension with attachments, m B = mass of the guide bracket running from the articulation point to the handle with attachments, l V = distance between the center of gravity of m V and the articulation point, l B = distance between the center of gravity of m B and the articulation point, l VG = Distance between the center of gravity of m V and the handle, l BG = distance between the center of gravity of m B and the handle.

Die Anmelderin hat umfangreiche Versuche hinsichtlich der Schwingungsübertragung vom Stampfer auf den Führungsbügel durchgeführt und ist dabei zu der Erkenntnis gekommen, daß weniger die elastische Anlenkung am Stampfer als vielmehr die Position des Anlenkpunktes und/oder die Massenverteilung des Führungsbügels entscheidenden Einfluß auf die Schwingungsübertragung haben. Sie hat dabei überraschenderweise festgestellt, daß eine Verlängerung des Stampfers nach oben, derart, daß der Führungsbügel oder genauer gesagt, die Verbindung zwischen Griff und Anlenkpunkt, nicht mehr, wie bisher üblich, senkrecht zur Längsachse des Stampfers steht, sondern nur noch einen Winkel von etwa 70° bis etwa 80° zur Stampferlängsachse aufweist, eine deutliche Verringerung der Vibrationen am Griffende des Führungsbügels eintritt. Unterstützt wird dies noch dadurch, daß der Schwerpunkt des Bügels vom Griffbereich weg verlegt wird, indem eine Massenverteilung am Führungsbügel entsprechend der zuvor genannten Gesetzmäßigkeit gewählt wird. Dadurch werden die dynamischen Drehmomente des Führungsbügels derart beeinflußt, daß sich die translatorischen und rotatorischen Bewegungen, die sich am Griffende überlagern, nahezu aufheben.The applicant has carried out extensive tests with regard to the transmission of vibrations from the tamper to the guide bracket and has come to the conclusion come that less the elastic articulation on the tamper than the position of the articulation point and / or the mass distribution of the guide bracket have a decisive influence on the vibration transmission. Surprisingly, she found that an extension of the tamper upwards, such that the guide bracket or more precisely, the connection between the handle and the articulation point is no longer perpendicular to the longitudinal axis of the tamper, as was previously the case, but only an angle of about 70 ° to about 80 ° to the ram longitudinal axis, a significant reduction in vibrations at the handle end of the guide bracket occurs. This is supported by the fact that the center of gravity of the bracket is moved away from the handle area by choosing a mass distribution on the guide bracket in accordance with the aforementioned law. As a result, the dynamic torques of the guide bracket are influenced in such a way that the translatory and rotary movements that overlap at the end of the handle almost cancel each other out.

In weiterer Ausgestaltung der Erfindung empfiehlt es sich, den Quotienten für die vorgenannte Gesetzmäßigkeit der Gewichtsverteilung etwa zwischen 0,7 bis 1,25, insbesondere etwa 0,8 bis 1,15 zu legen und die Position des Anlenkpunktes zumindest etwa 2 cm, vorzugsweise zumindest etwa 5 cm, oberhalb des vom Bügelgriff ausgehenden, gedachten Lotes auf die Stampfer-Längsachse vorzusehen.In a further embodiment of the invention, it is advisable to place the quotient for the aforementioned regularity of the weight distribution between about 0.7 to 1.25, in particular about 0.8 to 1.15, and the position of the articulation point at least about 2 cm, preferably at least about 5 cm, above the imaginary solder starting from the bow handle on the rammer's longitudinal axis.

Besonders günstig ist es in diesem Zusammenhang, wenn der Führungsbügel an seiner über den Stampferkopf hinaus ragenden Verlängerung ein Gegengewicht trägt, um die gewünschte Massenverteilung zu realisieren.In this context, it is particularly favorable if the guide bracket carries a counterweight on its extension projecting beyond the tamper head in order to achieve the desired mass distribution.

Weiterhin hat es sich als zweckmäßig erwiesen, daß der Anlenkpunkt des Führungsbügels aus der Längsachse des Stampfers herausverlegt wird in Richtung zum Griffbereich des Bügels.Furthermore, it has proven to be expedient for the articulation point of the guide bracket to be moved out of the longitudinal axis of the rammer in the direction of the handle area of the bracket.

Schließlich empfiehlt es sich, die Anlenkung des Führungsbügels am Stampferkopf über zumindest ein elastisches Element mit abgestuft progressiver Federkennlinie herbeizuführen. Diese abgestuft progressive Federkennlinie kann durch zusätzliche Dämpfungsflächen des elastischen Elementes realisiert werden, die in Ruhestellung gegenüber dem Haltebügel beabstandet sind und erst nach einer bestimmten Auslenkung des Führungsbügels mit ihm in Wirkverbindung treten.Finally, it is advisable to bring about the articulation of the guide bracket on the tamper head via at least one elastic element with a graduated, progressive spring characteristic. This graduated, progressive spring characteristic can be realized by additional damping surfaces of the elastic element, which are spaced apart from the holding bracket in the rest position and only come into active connection with it after a certain deflection of the guide bracket.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung; dabei zeigt

Figur 1
eine Seitenansicht des Stampfers in teilweiser Schnittdarstellung;
Figur 2
eine schematische Darstellung der Massenverteilung am Führungsbügel;
Figur 3
eine vergrößerte Frontalansicht des Stampferkopfes, teilweise im Schnitt und
Figur 4
eine vergrößerte Seitenansicht des Stampferkopfes.
Further features and advantages of the invention will become apparent from the following description of an embodiment with reference to the drawing; shows
Figure 1
a side view of the rammer in a partial sectional view;
Figure 2
a schematic representation of the mass distribution on the guide bracket;
Figure 3
an enlarged front view of the tamper head, partly in section and
Figure 4
an enlarged side view of the tamper head.

Die Gesamtansicht in Figur 1 zeigt einen im wesentlichen herkömmlichen Vibrationsstampfer 1, dessen Stampferfuß 2 durch einen Kraftstoff-Motor 3 in etwa vertikale Vibrationen versetzt wird. Dazu treibt der Motor 3 einen nicht näher dargestellten Exzenter an, an dem seinerseits eine Kolbenstange 4 gelagert ist, die an ihrem unteren Ende über vorgespannte Federn 5 und 6 mit dem Stampferfuß verspannt ist.The overall view in FIG. 1 shows an essentially conventional vibration rammer 1, the rammer foot 2 of which is approximately vertical by a fuel engine 3 Vibrations. For this purpose, the motor 3 drives an eccentric, not shown, on which in turn a piston rod 4 is mounted, which is braced at its lower end by means of prestressed springs 5 and 6 with the tamper foot.

Das untere Ende des Stampferfußes wird durch eine schräg angesetzte Stampferplatte 2a gebildet, so daß der Stampfer leicht nach vorn geneigt steht, im Ausführungsbeispiel unter einem Winkel von etwa 75°. Sein Gleichgewicht ist dadurch gewahrt, daß sowohl der Antriebsmotor 3 wie auch der Kraftstofftank 7 an der anderen Seite des Stampfers angeordnet sind.The lower end of the tamper foot is formed by an inclined tamper plate 2a, so that the tamper is inclined slightly forward, in the exemplary embodiment at an angle of approximately 75 °. Its balance is maintained in that both the drive motor 3 and the fuel tank 7 are arranged on the other side of the rammer.

Wesentlich ist nun zum einen, daß der Haltebügel eine bestimmte Massenverteilung aufweist, die der weiter oben angegebenen Gesetzmäßigkeit gehorcht, wobei zur Erläuterung der einzelnen Massen und Hebelarme, die dort genannt sind, auf Figur 2 verwiesen wird. Dort ist der Führungsbügel 10 mit seinem Anlenkpunkt 11 gezeigt, wobei der Doppelpfeil unterhalb des Anlenkpunktes die dort eingeleiteten Vibrationen andeutet. Diese Vibrationen verlaufen nicht genau vertikal, sondern längs einer komplizierten Kurvenbahn. Daher ist das Griffende 10a nicht nur Bewegungen in Vertikalrichtung, sondern auch in Horizontalrichtung ausgesetzt. Diese Bewegungen werden durch die erfindungsgemäße Massenverteilung in überraschender Weise reduziert bzw. eliminiert.It is essential, on the one hand, that the retaining bracket has a specific mass distribution which obeys the law specified above, reference being made to FIG. 2 for an explanation of the individual masses and lever arms mentioned there. The guide bracket 10 is shown there with its articulation point 11, the double arrow below the articulation point indicating the vibrations introduced there. These vibrations are not exactly vertical, but along a complicated curved path. Therefore, the handle end 10a is exposed not only to movements in the vertical direction but also in the horizontal direction. These movements are surprisingly reduced or eliminated by the mass distribution according to the invention.

Wesentlich ist zum anderen die Ausbildung des Stampferkopfes 8, der durch einen Aufsatz 9 (vgl. auch Figur 3) nach oben verlängert ist und in diesem erhöhten Bereich den Führungsbügel 10 trägt. Gleichzeitig ist der Aufsatz 9 gegenüber der Stampfer-Längsachse nach hinten, also zur Bedienungsperson hin, abgewinkelt. Dadurch wird der Anlenkpunkt 11 des Führungsbügels 10 am Stampferkopf gegenüber herkömmlichen Stampfern nicht nur nach oben verlängert, sondern auch in Richtung zur Bedienungsperson hin versetzt. Der Anlenkpunkt liegt daher oberhalb des vom Griff 10a des Führungsbügels 10 ausgehenden Lotes L auf die Stampfer-Längsachse A. Durch diese Position des Anlenkpunktes 11 kann der Führungsbügel 10 nahezu horizontal verlaufen, woraus ebenfalls eine Schwingungsverringerung am Griffende resultiert.Another important aspect is the design of the tamper head 8, which is formed by an attachment 9 (see also FIG. 3). is extended upwards and carries the guide bracket 10 in this raised area. At the same time, the attachment 9 is angled backwards relative to the tamper's longitudinal axis, that is to say to the operator. As a result, the articulation point 11 of the guide bracket 10 on the tamper head is not only extended upwards compared to conventional tamper, but is also displaced in the direction of the operator. The articulation point is therefore above the solder L extending from the handle 10a of the guide bracket 10 onto the ram longitudinal axis A. This position of the articulation point 11 allows the guide bracket 10 to run almost horizontally, which likewise results in a reduction in vibration at the end of the handle.

Des weiteren zeigen die Figuren, daß der Führungsbügel 10 über den Anlenkpunkt 11 hinaus nach vorn verlängert ist und dort Gegengewichte 12 trägt. Durch diese Gegengewichte läßt sich die gewünschte Massenverteilung bei gleichbleibender Bügelgeometrie in einfacher Weise herbeiführen.Furthermore, the figures show that the guide bracket 10 is extended forward beyond the articulation point 11 and carries counterweights 12 there. By means of these counterweights, the desired mass distribution can be brought about in a simple manner while the bracket geometry remains the same.

Figur 4 zeigt eine vergrößerte Darstellung des Anlenkpunktes 11 zur Verdeutlichung der dort eingebauten Dämpfung zwischen Führungsbügel 10 und Stampferkopf 8. Dazu ist der Führungsbügel 10 beidseits jeweils mit einem Kupplungsstück 13 verbunden, das im Ausführungsbeispiel 4 nach außen ragende Vorsprünge aufweist. Die beiden mittleren, nach oben und unten ragenden Vorsprünge 13a und 13b sind in ein Dämpfungselement in Form eines passenden gummielastischen Formteiles 14 eingebettet, während die beiden anderen Vorsprünge 13c und 13d in der Ruheposition des Führungsbügels 10 keinen oder nur geringen Kontakt mit diesem Formteil haben. Dies hat zur Folge, daß die beim Betrieb des Stampfers auftretenden Schwenkbewegungen zwischen Führungsbügel und Stampfer zunächst nur an den Vorsprüngen 13a und 13b gedämpft werden und die Dämpfung an den übrigen Vorsprüngen erst nach einer bestimmten Auslenkung des Führungsbügels wirksam wird. Man erhält dadurch eine abgestufte Dämpfung, die sich ergonomisch besonders günstig auswirkt.FIG. 4 shows an enlarged illustration of the articulation point 11 to clarify the damping installed there between the guide bracket 10 and the tamper head 8. For this purpose, the guide bracket 10 is connected on both sides to a coupling piece 13, which in the exemplary embodiment 4 has outwardly projecting projections. The two middle, upward and downward projections 13a and 13b are embedded in a damping element in the form of a matching rubber-elastic molded part 14, while the other two projections 13c and 13d in the rest position of the guide bracket 10 have little or no contact with this molded part. The result of this is that the pivoting movements between the guide bracket and tamper that occur during operation of the rammer are initially damped only on the projections 13a and 13b and the damping on the other projections only becomes effective after a certain deflection of the guide bracket. This results in a graduated damping that has an ergonomically particularly favorable effect.

Selbstverständlich kann die Form des Kupplungselementes 13 wie auch des gummielastischen Formstückes 14 beliebig sein. Wesentlich ist lediglich, daß ein Teil der Dämpfungsflächen erst nach einer bestimmten Auslenkung des Führungsbügels wirksam wird.Of course, the shape of the coupling element 13 as well as the rubber-elastic molding 14 can be any. It is only essential that part of the damping surfaces only become effective after a certain deflection of the guide bracket.

Claims (7)

Stampfer zur Bodenverdichtung, der durch einen eingebauten Antrieb (3) etwa vertikale Vibrationen ausführt und dabei durch einen elastisch am Stampferkopf (8) angelenkten und am anderen Ende einen Griff (10a) aufweisenden Führungsbügel (10) von einer Bedienungsperson zu halten ist, wobei der Führungsbügel (10) eine über seinen Anlenkpunkt (11) hinaus laufende Verlängerung (10b) aufweist,
dadurch gekennzeichnet,
daß der Anlenkpunkt (11) des Führungsbügels (10) am Stampferkopf (8) oberhalb eines vom Griffbereich des Bügels (10) ausgehenden gedachten Lotes (L) auf die Stampfer-Längsachse (A) angeordnet ist und/oder bei am Anlenkpunkt (11) geteilt gedachtem Führungsbügel (10) seine Massenverteilung folgende Bestimmung erfüllt m V .l V .l VG m B .l B .l BG = 0,6 - 1,5 (Quotient)
Figure imgb0002
 wobei mV =   Masse der Verlängerung (10b) nebst Anbauteilen; mB =   Masse des vom Anlenkpunkt (11) zum Griff laufenden Führungsbügels nebst Anbauteilen; lV =   Abstand zwischen Schwerpunkt von mV und Anlenkpunkt (11); lB =   Abstand zwischen Schwerpunkt von mB und Anlenkpunkt (11); lVG =   Abstand zwischen Schwerpunkt von mV und Griff (10a); lBG =   Abstand zwischen Schwerpunkt von mB und Griff (10a). Rammer for soil compaction, which executes approximately vertical vibrations through a built-in drive (3) and is to be held by an operator by means of a guide bracket (10) which is elastically articulated on the rammer head (8) and has a handle (10a) at the other end, the Guide bracket (10) has an extension (10b) extending beyond its articulation point (11),
characterized,
that the articulation point (11) of the guide bracket (10) is arranged on the tamper head (8) above an imaginary solder (L) starting from the grip area of the yoke (10) on the tamper's longitudinal axis (A) and / or at the articulation point (11) divided guide bracket (10) fulfills its mass distribution following determination m V .l V .l VG m B .l B .l BG = 0.6 - 1.5 (quotient)
Figure imgb0002
 in which m V = mass of the extension (10b) with attachments; m B = mass of the guide bracket running from the articulation point (11) to the handle along with attachments; l V = distance between the center of gravity of m V and the articulation point (11); l B = distance between the center of gravity of m B and the articulation point (11); l VG = distance between the center of gravity of m V and the handle (10a); l BG = distance between the center of gravity of m B and the handle (10a). Stampfer nach Anspruch 1,
dadurch gekennzeichnet,
daß der oben genannte Quotient für die Gewichtsverteilung etwa zwischen 0,7 bis 1,25, insbesondere zwischen 0,8 bis 1,15 liegt.The tamper according to claim 1,
characterized,
that the above quotient for the weight distribution is approximately between 0.7 to 1.25, in particular between 0.8 to 1.15. Stampfer zur Bodenverdichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Anlenkpunkt (11) des Führungsbügels (10) zumindest etwa 2 cm, insbesondere etwa 3 cm bis 20 cm oberhalb des gedachten Lotes (L) angeordnet ist.Soil compactor according to claim 1,
characterized,
that the articulation point (11) of the guide bracket (10) is arranged at least about 2 cm, in particular about 3 cm to 20 cm above the imaginary solder (L). Stampfer nach Anspruch 1,
dadurch gekennzeichnet,
daß der Anlenkpunkt (11) des Führungsbügels (10) bezogen auf die Längsachse (A) des Stampfers in Richtung zum Griffbereich des Bügels versetzt ist.The tamper according to claim 1,
characterized,
that the articulation point (11) of the guide bracket (10) with respect to the longitudinal axis (A) of the rammer is offset in the direction of the grip area of the bracket. Stampfer nach Anspruch 1,
dadurch gekennzeichnet,
daß die Verlängerung (10b) des Führungsbügels (10) ein Gegengewicht (12) aufweist.The tamper according to claim 1,
characterized,
that the extension (10b) of the guide bracket (10) has a counterweight (12). Stampfer nach Anspruch 1,
dadurch gekennzeichnet,
daß die Anlenkung des Führungsbügels (10) am Stampferkopf (8) über zumindest ein elastisches Element (13) mit abgestuft progressiver Federkennlinie erfolgt.The tamper according to claim 1,
characterized,
that the articulation of the guide bracket (10) on the tamper head (8) takes place via at least one elastic element (13) with a graduated, progressive spring characteristic. Stampfer nach Anspruch 6,
dadurch gekennzeichnet,
daß die abgestuft progressive Federkennlinie durch zusätzliche Dämpfungsflächen des elastischen Elementes (13) realisiert ist, die erst nach einer bestimmten Auslenkung des Führungsbügels (10) in Wirkverbindung mit ihm gelangen.The rammer according to claim 6,
characterized,
that the graduated progressive spring characteristic is realized by additional damping surfaces of the elastic element (13), which come into operative connection with it only after a certain deflection of the guide bracket (10).
EP95110696A 1994-10-10 1995-07-08 Vibrating tamper Expired - Lifetime EP0707115B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4436081A DE4436081A1 (en) 1994-10-10 1994-10-10 Vibration rammer
DE4436081 1994-10-10

Publications (3)

Publication Number Publication Date
EP0707115A2 true EP0707115A2 (en) 1996-04-17
EP0707115A3 EP0707115A3 (en) 1996-09-18
EP0707115B1 EP0707115B1 (en) 1999-10-06

Family

ID=6530332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110696A Expired - Lifetime EP0707115B1 (en) 1994-10-10 1995-07-08 Vibrating tamper

Country Status (9)

Country Link
US (1) US5645370A (en)
EP (1) EP0707115B1 (en)
JP (1) JP2949475B2 (en)
AT (1) ATE185387T1 (en)
BR (1) BR9504329A (en)
CA (1) CA2158793C (en)
DE (2) DE4436081A1 (en)
ES (1) ES2139118T3 (en)
ZA (1) ZA958507B (en)

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Also Published As

Publication number Publication date
JP2949475B2 (en) 1999-09-13
EP0707115A3 (en) 1996-09-18
CA2158793C (en) 2001-09-18
US5645370A (en) 1997-07-08
DE59506982D1 (en) 1999-11-11
EP0707115B1 (en) 1999-10-06
ZA958507B (en) 1996-07-29
DE4436081A1 (en) 1996-04-11
ATE185387T1 (en) 1999-10-15
CA2158793A1 (en) 1996-04-11
JPH08120616A (en) 1996-05-14
BR9504329A (en) 1996-10-08
ES2139118T3 (en) 2000-02-01

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