EP1012404B1 - Working device with mass balancing on the crank mechanism - Google Patents
Working device with mass balancing on the crank mechanism Download PDFInfo
- Publication number
- EP1012404B1 EP1012404B1 EP98951314A EP98951314A EP1012404B1 EP 1012404 B1 EP1012404 B1 EP 1012404B1 EP 98951314 A EP98951314 A EP 98951314A EP 98951314 A EP98951314 A EP 98951314A EP 1012404 B1 EP1012404 B1 EP 1012404B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mass
- crank
- working device
- counter
- counter 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.)
- Expired - Lifetime
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0073—Arrangements for damping of the reaction force
- B25D2217/0076—Arrangements for damping of the reaction force by use of counterweights
- B25D2217/0088—Arrangements for damping of the reaction force by use of counterweights being mechanically-driven
-
- 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
-
- 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
- Y10T74/21—Elements
- Y10T74/2173—Cranks and wrist pins
- Y10T74/2183—Counterbalanced
-
- 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
- Y10T74/21—Elements
- Y10T74/2173—Cranks and wrist pins
- Y10T74/2183—Counterbalanced
- Y10T74/2184—Vibration dampers
Definitions
- the invention relates to a working device according to the preamble of claim 1.
- the invention relates to a ramming device for soil compaction or a hammer.
- Known rammers of this type are constructed so that a motor and a crank mechanism receiving the upper mass via a spring set with a essentially a working mass forming a working or compaction plate connected is.
- the rotary motion generated by the motor is converted into an oscillating axial movement by the crank mechanism Transfer to the worktop for soil compaction via the spring set becomes.
- the upper mass comprises about two thirds and the striking working mass a third of the total mass of rammers, while that of the upper mass and the distances traveled by the working mass in reverse Stand in relation to each other.
- the upper mass moves in one Size range from 25 to 30 mm.
- the vibrations of the upper mass are transferred to the transferring the implement leading person, especially in the case of long periods Working is very uncomfortable. Are particularly stressful for the operator thereby vibrations in the horizontal or lateral direction. vibrations in the vertical direction, on the other hand, are for efficient work of the Stammerers required.
- Fig. 2 shows such a known rammer.
- a crank pin 4 is attached to the one Connecting rod 5 is rotatably mounted.
- the connecting rod 5 is at its other End by means of a piston pin 6 rotatably with a guide piston 7 connected.
- the guide piston 7 carries one through a steel disc formed and fastened by a nut 8 piston guide 9.
- the guide piston 7 is with the piston guide 9 within one to the undersize belonging guide tube 10 axially back and forth. This axial direction corresponds to a vertical or working direction of the device during its Insert.
- a multi-spring Spring set 11 On both sides of the piston guide 9 is a multi-spring Spring set 11 arranged, the springs on each of their Piston guide 9 facing away from the guide tube 10 attached Spring plates 12 are supported.
- the guide tube 10 with the spring plates 12 belongs to the working or undersize of the rammer.
- a not shown in Fig. 2 can on the lower mass Pad foot are attached, which is used for soil compaction.
- the upper mass is to prevent penetration of moisture and dirt and the lower mass connected by an elastic bellows 13.
- the rotary movement of the motor is from the crank disc 3, the crank pin 4 and the connecting rod 5 existing crank mechanism converted into an oscillating axial movement of the guide piston 7.
- This axial movement is via the spring sets 11 on the guide tube 10 and thus transferred to the sub-mass and can be used for soil compaction be used.
- the invention is therefore based on the object of specifying an implement, with the horizontal vibrations of the upper mass already in the making can be reduced.
- the task is performed by an implement with the features solved by claim 1.
- crank mechanism taken on its own, is considerable Generates vibrations, which, however, with those by the subordinate Components, namely in particular the guide piston and the spring assemblies overlap generated vibrations and substantially compensate.
- the superposition of the vibrations leads to a considerable one Calming of the upper mass, especially in the horizontal direction.
- the mass and the angular offset are the counter mass depending on the properties of the spring set adjustable so that the not in the working or vertical direction of the implement directional vibrations are minimal. This is e.g. in the Manufacture or assembly of the crank disc possible, depending on the used Spring set a corresponding angular arrangement of the counterweight can be provided with a suitable mass.
- the counter mass is included the crank disc is formed in one piece. This leads to a simplification assembly and manufacture. Depending on the manufacturing process, Pour the crank disc into a suitable mold or when forging an appropriate die can be used for the crank disk.
- the counterweight is on the Crank disk attachable. It is particularly advantageous if the counter mass relative to the crank pin angularly about the axis of rotation of the Crank disk can be attached to the crank disk at various points is. This has the advantage that fine adjustments are made during assembly can be used to further reduce the horizontal Lead upper mass vibrations. It is also possible without change of the molds or dies used in the manufacture of the crank disc and the counterweight individually when installing different spring assemblies to coordinate with each other.
- the mass is the counter mass larger, preferably even considerably larger than that of the crank pin. This enables the moving masses due to the counter mass the connecting rod, the guide piston and the piston guide.
- crank disc 3 carries a counter mass 14 in the invention. Even though this is not easily recognizable in Fig. 1, is the focus the counter mass 14 not with respect to an axis of rotation 15 of the crank disk 3 arranged opposite the crank pin 4, which is an offset angle of would correspond to 180 °, but by an angle not equal to 180 °. Depending on Embodiment, the offset angle should deviate by at least 10 ° from 180 °, i.e. be less than 170 ° or greater than 190 °. Priorities the counterweight 14 and the crank pin 4 and the axis of rotation 15 are thus not on a straight line.
- the counter mass 14 is in one piece made with the crank disc 3, for example by forging.
- the Crank pin 4 is also integrally connected to the crank disk 3 and have been processed to produce a bearing seat.
- the crank disc 3 essentially three elements comprises: a substantially balanced carrier disk which the Axis of rotation 15 carries and optionally provided with external teeth , the crank pin 4 and the counter mass 14.
- the counter mass 14 can e.g. also consist of several individual masses that appear in different places the carrier disc are attached.
- crank disk 3 as in the prior art, but has an attachment option for the counter mass 14.
- the counter mass 14 can each depending on the application in different angular positions and radii as well with different mass depending on the vibration properties of the overall device be attached.
- a tamper has been used as an example of a working device according to the invention described for soil compaction.
- the invention can also a hammer, in particular a hammer, advantageously applied become.
- a percussion hammer usually points instead of that at the tamper the spring set 11 forming steel springs an air spring hammer mechanism.
- the production the directional oscillation takes place by means of a crank mechanism essentially the same as described above.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Road Paving Machines (AREA)
Abstract
Description
Die Erfindung betrifft ein Arbeitsgerät gemäß dem Oberbegriff von Patentanspruch 1. Insbesondere betrifft die Erfindung ein Stampfgerät zur Bodenverdichtung oder einen Hammer.The invention relates to a working device according to the preamble of claim 1. In particular, the invention relates to a ramming device for soil compaction or a hammer.
Bekannte Stampfgeräte dieser Art sind so aufgebaut, daß eine einen Motor und einen Kurbeltrieb aufnehmende Obermasse über einen Federsatz mit einer im wesentlichen eine Arbeits- bzw. Verdichtungsplatte bildenden Arbeitsmasse verbunden ist. Die vom Motor erzeugte Drehbewegung wird durch den Kurbeltrieb in eine oszillierende Axialbewegung gewandelt, die über den Federsatz auf die Arbeitsplatte zur Bodenverdichtung übertragen wird. Die Obermasse umfaßt etwa zwei Drittel und die schlagende Arbeitsmasse ein Drittel der gesamten Stampfermasse, während die von der Obermasse und der Arbeitsmasse jeweils zurückgelegten Wege in umgekehrtem Verhältnis zueinander stehen. Dabei bewegt sich die Obermasse in einer Größenordnung von 25 bis 30 mm.Known rammers of this type are constructed so that a motor and a crank mechanism receiving the upper mass via a spring set with a essentially a working mass forming a working or compaction plate connected is. The rotary motion generated by the motor is converted into an oscillating axial movement by the crank mechanism Transfer to the worktop for soil compaction via the spring set becomes. The upper mass comprises about two thirds and the striking working mass a third of the total mass of rammers, while that of the upper mass and the distances traveled by the working mass in reverse Stand in relation to each other. The upper mass moves in one Size range from 25 to 30 mm.
Die Schwingungen der Obermasse werden über einen Führungsbügel auf die das Arbeitsgerät führende Person übertragen, was insbesondere bei längerem Arbeiten sehr unangenehm ist. Besonders belastend sind für den Bediener dabei Schwingungen in Horizontal- bzw. Seitenrichtung. Schwingungen in Vertikalrichtung sind dagegen für ein leistungsfähiges Arbeiten des Stampfers erforderlich.The vibrations of the upper mass are transferred to the transferring the implement leading person, especially in the case of long periods Working is very uncomfortable. Are particularly stressful for the operator thereby vibrations in the horizontal or lateral direction. vibrations in the vertical direction, on the other hand, are for efficient work of the Stammerers required.
Fig. 2 zeigt einen derartigen bekannten Stampfer.Fig. 2 shows such a known rammer.
Gemäß Fig. 2 wird von einem nicht dargestellten Motor eine Antriebswelle 1
des Stampfers angetrieben, die über ein Ritzel 2 eine in dem Stampfergehäuse
gelagerte und mit einer Außenverzahnung versehene Kurbelscheibe 3 antreibt.
An der Kurbelscheibe 3 ist ein Hubzapfen 4 angebracht, auf den ein
Pleuel 5 drehbeweglich aufgesetzt ist. Das Pleuel 5 ist an seinem anderen
Ende mittels eines Kolbenbolzens 6 drehbeweglich mit einem Führungskolben
7 verbunden. Der Führungskolben 7 trägt eine durch eine Stahlscheibe
gebildete und durch eine Mutter 8 befestigte Kolbenführung 9. Der Führungskolben
7 ist mit der Kolbenführung 9 innerhalb eines zur Untermasse
gehörenden Führungsrohrs 10 axial hin- und herbeweglich. Diese Axialrichtung
entspricht einer Vertikal- bzw. Arbeitsrichtung des Geräts während seines
Einsatzes.2, a drive shaft 1 of a motor, not shown
of the rammer, driven by a
Auf beiden Seiten der Kolbenführung 9 ist ein aus mehreren Federn bestehender
Federsatz 11 angeordnet, wobei die Federn jeweils auf ihren von der
Kolbenführung 9 abgewandten Seite gegen am Führungsrohr 10 befestigte
Federplatten 12 abgestützt sind.On both sides of the piston guide 9 is a
Das Führungsrohr 10 mit den Federplatten 12 gehört zur Arbeits- bzw. Untermasse
des Stampfers. An der Untermasse kann ein in Fig. 2 nicht gezeigter
Stampffuß angebracht werden, der zur Bodenverdichtung dient. Um das
Eindringen von Feuchtigkeit und Schmutz zu vermeiden, sind die Obermasse
und die Untermasse durch einen elastischen Balg 13 verbunden.The
Wie aus Fig. 2 erkennbar, wird die Drehbewegung des Motors durch den aus
der Kurbelscheibe 3, dem Hubzapfen 4 und dem Pleuel 5 bestehenden Kurbeltrieb
in eine oszillierende Axialbewegung des Führungskolbens 7 gewandelt.
Diese Axialbewegung wird über die Federsätze 11 auf das Führungsrohr
10 und damit auf die Untermasse übertragen und kann zur Bodenverdichtung
genutzt werden.As can be seen from Fig. 2, the rotary movement of the motor is from
the
Zur Dämpfung der auf den Bediener wirkenden Schwingungen war es bisher bekannt, den Führungbügel gegenüber der Obermasse mittels Gummielementen mechanisch zu entkoppeln. Der angebaute Antriebsmotor bleibt dabei aber weiter hohen Schwingungsbelastungen ausgesetzt. Eine Verbesserung der Schwingungsdämpfung kann hierbei nur durch hohen baulichen Aufwand erzielt werden.It was previously used to dampen vibrations affecting the operator known, the guide bracket against the upper mass by means of rubber elements to decouple mechanically. The attached drive motor remains but still exposed to high vibration loads. An improvement Vibration damping can only be achieved by high structural Effort can be achieved.
Wünschenswert ist es daher, das Entstehen von Schwingungen der Obermasse von vornherein zu vermeiden.It is therefore desirable to have vibrations in the upper mass to avoid from the outset.
Aus der DE-OS 19 25 870 ist ein Stampfer bekannt, bei dem die Antriebsleistung des Motors auf zwei Kurbeltriebe verteilt wird, die gleichzeitig eine Arbeitsmasse über Federsätze beaufschlagen. An den sich gegenläufig drehenden Kurbeltrieben sind Gegenmassen befestigt, deren Fliehkräfte einander in horizontaler Richtung ausgleichen, während sie sich in Vertikalrichtung summieren, wodurch die Schwingungsamplitude des Stampfergehäuses vermindert wird. Auch bei diesem Gerät treten jedoch für den Bediener belastenden Horizontalschwingungen auf.From DE-OS 19 25 870 a rammer is known in which the drive power the engine is distributed to two crank drives, which are simultaneously a working mass act on spring sets. On the counter-rotating Crank drives are attached to counterweights, the centrifugal forces of which are in each other compensate for the horizontal direction while moving in the vertical direction add up, which reduces the vibration amplitude of the tamper housing becomes. Even with this device, however, are stressful for the operator Horizontal vibrations.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Arbeitsgerät anzugeben, bei dem Horizontalschwingungen der Obermasse bereits im Entstehen verringert werden können.The invention is therefore based on the object of specifying an implement, with the horizontal vibrations of the upper mass already in the making can be reduced.
Erfindungsgemäß wird die Aufgabe durch ein Arbeitsgerät mit den Merkmalen von Patentanspruch 1 gelöst.According to the invention, the task is performed by an implement with the features solved by claim 1.
Es hat sich überraschenderweise gezeigt, daß ein Auswuchten des Kurbeltriebs, d.h. ein Versehen der den Hubzapfen tragenden Kurbelscheibe mit einer die Masse des Kurbelzapfens ausgleichenden Gegenmasse nicht die gewünschte Verbesserung hinsichtlich einer Reduktion der Horizontalschwingungen der Obermasse führt. Vielmehr wurde völlig überraschend herausgefunden, daß die Horizontalschwingungen nur dann wirksam vermindert werden können, wenn der Schwerpunkt des Hubzapfens, die Drehachse der Kurbelscheibe und der Schwerpunkt der Gegenmasse nicht auf einer Geraden liegen und somit die Schwerpunkte bezüglich der Drehachse der Kurbelscheibe um 180° versetzt sind, sondern wenn der Schwerpunkt der Gegenmasse zum Schwerpunkt des Hubzapfens bezüglich der Drehachse der Kurbelscheibe um einen Winkel ungleich 180° versetzt angeordnet ist.Surprisingly, it has been shown that balancing the crank mechanism, i.e. providing the crank disk carrying the crank pin with a the mass of the crank pin balancing counter mass is not the desired one Improvement in reducing horizontal vibrations the upper mass leads. Rather, it was found completely surprisingly that the horizontal vibrations can only be effectively reduced can, if the center of gravity of the crank pin, the axis of rotation of the The crank disc and the center of gravity of the counter mass are not on a straight line lie and thus the focus with respect to the axis of rotation of the crank disc are offset by 180 °, but when the center of gravity of the counter mass to the center of gravity of the crank pin with respect to the axis of rotation of the crank disk is offset by an angle not equal to 180 °.
Dies bedeutet zwar, daß der Kurbeltrieb, für sich alleine genommen, erhebliche Schwingungen erzeugt, die sich jedoch mit den durch die nachgeordneten Bauelemente, nämlich insbesondere den Führungskolben und den Federpaketen erzeugten Schwingungen überlagern und im wesentlichen kompensieren. Im Ergebnis führt das Überlagern der Schwingungen zu einer beträchtlichen Beruhigung der Obermasse, insbesondere in Horizontalrichtung.This means that the crank mechanism, taken on its own, is considerable Generates vibrations, which, however, with those by the subordinate Components, namely in particular the guide piston and the spring assemblies overlap generated vibrations and substantially compensate. As a result, the superposition of the vibrations leads to a considerable one Calming of the upper mass, especially in the horizontal direction.
Bei einer bevorzugten Ausführungsform sind die Masse und der Winkelversatz der Gegenmasse in Abhängigkeit von den Eigenschaften des Federsatzes derart einstellbar, daß die nicht in Arbeits- bzw. Vertikalrichtung des Arbeitsgeräts gerichteten Schwingungen minimal sind. Dies ist z.B. bei der Fertigung oder der Montage der Kurbelscheibe möglich, wobei je nach verwendetem Federsatz eine entsprechende winkelmäßige Anordnung der Gegenmasse mit geeigneter Masse vorgesehen werden kann.In a preferred embodiment, the mass and the angular offset are the counter mass depending on the properties of the spring set adjustable so that the not in the working or vertical direction of the implement directional vibrations are minimal. This is e.g. in the Manufacture or assembly of the crank disc possible, depending on the used Spring set a corresponding angular arrangement of the counterweight can be provided with a suitable mass.
Bei einer besonders bevorzugten Ausführungsform ist die Gegenmasse mit der Kurbelscheibe einstückig ausgebildet. Dies führt zu einer Vereinfachung der Montage und der Herstellung. Je nach Herstellungsverfahren kann beim Gießen der Kurbelscheibe eine entsprechende Gießform bzw. beim Schmieden der Kurbelscheibe ein entsprechendes Gesenk verwendet werden.In a particularly preferred embodiment, the counter mass is included the crank disc is formed in one piece. This leads to a simplification assembly and manufacture. Depending on the manufacturing process, Pour the crank disc into a suitable mold or when forging an appropriate die can be used for the crank disk.
Bei einer anderen bevorzugten Ausführungsform ist die Gegenmasse an der Kurbelscheibe befestigbar. Besonders vorteilhaft ist es dabei, wenn die Gegenmasse relativ zu dem Kurbelzapfen winkelmäßig um die Drehachse der Kurbelscheibe an verschiedenen Stellen auf der Kurbelscheibe befestigbar ist. Dies hat den Vorteil, daß bei der Montage Feinabstimmungen vorgenommen werden können, die zu einer weiteren Verminderung der horizontalen Obermassenschwingungen führen. Ebenfalls ist es möglich, ohne Änderung der bei der Herstellung verwendeten Formen oder Gesenke die Kurbelscheibe und die Gegenmasse bei Einbau verschiedener Federpakete jeweils individuell aufeinander abzustimmen.In another preferred embodiment, the counterweight is on the Crank disk attachable. It is particularly advantageous if the counter mass relative to the crank pin angularly about the axis of rotation of the Crank disk can be attached to the crank disk at various points is. This has the advantage that fine adjustments are made during assembly can be used to further reduce the horizontal Lead upper mass vibrations. It is also possible without change of the molds or dies used in the manufacture of the crank disc and the counterweight individually when installing different spring assemblies to coordinate with each other.
Es hat sich als zweckmäßig erwiesen, wenn die Differenz zwischen dem Versatzwinkel und 180° wenigstens 10° beträgt.It has proven useful if the difference between the offset angles and 180 ° is at least 10 °.
Bei einer besonders vorteilhaften Ausführungsform der Erfindung beträgt der Winkel zwischen dem Schwerpunkt der Gegenmasse und dem Schwerpunkt des Hubzapfens bezüglich der Drehachse der Kurbelscheibe ungefähr 90°.In a particularly advantageous embodiment of the invention the angle between the center of gravity of the counter mass and the center of gravity of the crank pin with respect to the axis of rotation of the crank disk 90 °.
Ebenso hat es sich als zweckmäßig herausgestellt, wenn die Masse der Gegenmasse im wesentlichen gleich der Masse des Hubzapfens ist.It has also proven to be useful if the mass of the counter mass is substantially equal to the mass of the crank pin.
Bei einer anderen Ausführungsform der Erfindung ist die Masse der Gegenmasse größer, vorzugsweise sogar erheblich größer als die des Hubzapfens. Dies ermöglicht es, durch die Gegenmasse auch die sich bewegenden Massen des Pleuels, des Führungskolbens und der Kolbenführung auszugleichen. In another embodiment of the invention, the mass is the counter mass larger, preferably even considerably larger than that of the crank pin. This enables the moving masses due to the counter mass the connecting rod, the guide piston and the piston guide.
Diese und weitere Merkmale der Erfindung werden nachfolgend unter Zuhilfenahme der Figuren näher erläutert.These and other features of the invention are described below with the help of the figures explained in more detail.
Es zeigen:
- Fig. 1
- einen Teil eines erfindungsgemäßen Stampfgeräts in Schnittdarstellung;
- Fig. 2
- einen Teilschnitt eines bekannten Stampfgeräts.
- Fig. 1
- a part of a ramming device according to the invention in a sectional view;
- Fig. 2
- a partial section of a known ramming device.
Da wesentliche Bauelemente des erfindungsgemäßen, in Fig. 1 gezeigten Stampfgeräts den bereits in Zusammenhang mit Fig. 2 beschriebenen, bekannten Elementen entsprechen, wird auf eine erneute Beschreibung verzichtet. Zur Vereinfachung werden in den Figuren für gleiche Bauteile auch gleiche Bezugszeichen verwendet.Since essential components of the invention shown in Fig. 1 The ramming device known, already described in connection with FIG. 2 Corresponding elements will not be described again. To simplify the same components in the figures the same reference numerals are used.
Der wesentliche Unterschied zwischen dem in Fig. 2 gezeigten, bekannten
Stampfer und dem erfindungsgemäßen Stampfer aus Fig. 1 besteht darin,
daß die Kurbelscheibe 3 bei der Erfindung eine Gegenmasse 14 trägt. Obwohl
dies in Fig. 1 nicht ohne weiteres erkennbar ist, ist der Schwerpunkt
der Gegenmasse 14 nicht bezüglich einer Drehachse 15 der Kurbelscheibe 3
gegenüber von dem Hubzapfen 4 angeordnet, was einem Versatzwinkel von
180° entsprechen würde, sondern um einen Winkel ungleich 180°. Je nach
Ausführungsform sollte der Versatzwinkel um mindestens 10° von 180° abweichen,
d.h. kleiner als 170° oder größer als 190° sein. Die Schwerpunkte
der Gegenmasse 14 und des Hubzapfens 4 sowie die Drehachse 15 liegen somit
nicht auf einer Geraden. Als besonders zweckmäßiger Winkel hat sich
dabei ein Winkelversatz der beiden Schwerpunkte von 90° herausgestellt. In
dem Fall ist die Phasenlage einer bei Drehung der Kurbelscheibe 3 durch die
Masse des Hubzapfens 4 erzeugten Fliehkraft und einer durch die Gegenmasse
14 erzeugten Fliehkraft um einen Winkel von 90° versetzt, wodurch
sich die Fliehkräfte nicht gegenseitig aufheben, was bei einem Winkelversatz
von 180° und entsprechend gleicher Masse der Fall wäre. Vielmehr wird daher
eine resultierende Kraft durch den Kurbeltrieb erzeugt, die sich mit anderen,
im wesentlichen durch das Pleuel 5, den Führungskolben 7 und die
Federsätze 11 erzeugten Kräften überlagert, was insgesamt zu einer Beruhigung
der Obermasse führt. The main difference between the known one shown in FIG. 2
The tamper and the tamper according to the invention from FIG. 1 consists in
that the
Bei der in Fig. 1 gezeigten Ausführungsform ist die Gegenmasse 14 einstükkig
mit der Kurbelscheibe 3 beispielsweise durch Schmieden hergestellt. Der
Hubzapfen 4 ist ebenfalls einstückig mit der Kurbelscheibe 3 verbunden und
zur Erzeugung eines Lagersitzes bearbeitet worden. Zur begrifflichen Klärung
sei darauf hingewiesen, daß die Kurbelscheibe 3 im wesentlichen drei Elemente
aufweist: eine im wesentlichen ausgewuchtete Trägerscheibe, die die
Drehachse 15 trägt und gegebenenfalls mit einer Außenverzahnung versehen
ist, den Hubzapfen 4 und die Gegenmasse 14. Die Gegenmasse 14 kann z.B.
auch aus mehreren Einzelmassen bestehen, die an verschiedenen Stellen auf
der Trägerscheibe befestigt sind.In the embodiment shown in FIG. 1, the
Bei einer nicht dargestellten Ausführungsform der Erfindung ist die Kurbelscheibe
3 wie beim Stand der Technik ausgebildet, weist jedoch eine Befestigungsmöglichkeit
für die Gegenmasse 14 auf. Die Gegenmasse 14 kann je
nach Anwendungsfall in verschiedenen Winkelstellungen und Radien sowie
mit unterschiedlicher Masse je nach Schwingungseigenschaften des Gesamtgeräts
angebracht werden.In an embodiment of the invention, not shown, the
Bisher wurde als Beispiel für ein erfindungsgemäßes Arbeitsgerät ein Stampfer zur Bodenverdichtung beschrieben. Die Erfindung kann jedoch auch bei einem Hammer, insbesondere einem Schlaghammer, vorteilhaft angewendet werden. Ein Schlaghammer weist üblicherweise statt der bei dem Stampfer den Federsatz 11 bildenden Stahlfedern ein Luftfederschlagwerk auf. Die Erzeugung der gerichteten Schwingung mittels eines Kurbeltriebs erfolgt aber im wesentlichen genauso wie oben beschrieben.So far, a tamper has been used as an example of a working device according to the invention described for soil compaction. However, the invention can also a hammer, in particular a hammer, advantageously applied become. A percussion hammer usually points instead of that at the tamper the spring set 11 forming steel springs an air spring hammer mechanism. The production the directional oscillation takes place by means of a crank mechanism essentially the same as described above.
Claims (9)
- Working device, in particular a ramming device for ground compaction or a hammer, having a working mass which can be driven linearly in a reciprocating manner by a motor associated with an upper mass, by way of a single crank mechanism (3, 4, 5) and a spring set (11), wherein the crank mechanism has a crank disc (3) which is driven by the motor and which, in an eccentric manner with respect to its axis of rotation (15), carries a crank pin (4), which is coupled to a connecting rod (5), and a counter mass (14), and the centre of gravity of the counter mass (14) is disposed offset by an angle not equal to 180° from the centre of gravity of the crank pin (4) with respect to the axis of rotation (15) of the crank disc (3).
- Working device according to claim 1, characterised in that the mass and angular offsetting of the counter mass (14) can be adjusted in dependence upon the properties of the spring set (11) in such a way that the vibrations not directed in the working direction of the working device are minimal.
- Working device according to any one of the preceding claims, characterised in that the counter mass (14) is formed as one piece with the crank disc (3).
- Working device according to claim 1 or 2, characterised in that the counter mass (14) can be attached to the crank disc (3).
- Working device according to claim 4, characterised in that the counter mass (14) can be attached to different points on the crank disc (3) around the axis of rotation (15) at an angle with respect to the crank pin (4).
- Working device according to any one of the preceding claims, characterised in that the difference between the angle of offsetting and 180° amounts to at least 10°.
- Working device according to any one of the preceding claims, characterised in that the angle between the centre of gravity of the counter mass (14) and the centre of gravity of the crank pin (4) is approximately 90° with respect to the axis of rotation (15) of the crank disc (3).
- Working device according to any one of the preceding claims, characterised in that the mass of the counter mass (14) is substantially equal to the mass of the crank pin (4).
- Working device according to any one of claims 1 to 7, characterised in that the mass of the counter mass (14) is greater than the mass of the crank pin (4).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19739742 | 1997-09-10 | ||
| DE19739742A DE19739742C2 (en) | 1997-09-10 | 1997-09-10 | Tool with mass balance on the crank mechanism |
| PCT/EP1998/005391 WO1999013165A1 (en) | 1997-09-10 | 1998-08-25 | Working device with mass balancing on the crank mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1012404A1 EP1012404A1 (en) | 2000-06-28 |
| EP1012404B1 true EP1012404B1 (en) | 2002-04-10 |
Family
ID=7841878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98951314A Expired - Lifetime EP1012404B1 (en) | 1997-09-10 | 1998-08-25 | Working device with mass balancing on the crank mechanism |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6352004B1 (en) |
| EP (1) | EP1012404B1 (en) |
| JP (1) | JP3851083B2 (en) |
| DE (2) | DE19739742C2 (en) |
| WO (1) | WO1999013165A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2364730B (en) * | 2001-01-04 | 2003-09-17 | Ivan Edwin Stuart | Portable flood barrier |
| JP4895064B2 (en) * | 2001-04-26 | 2012-03-14 | 国土交通省中部地方整備局長 | Road working vehicle, traction device, and road working method |
| DE10137337A1 (en) * | 2001-07-31 | 2003-04-03 | Wacker Werke Kg | Stamper with low-vibration guide bracket |
| JP4195818B2 (en) * | 2003-01-16 | 2008-12-17 | 株式会社マキタ | Electric hammer |
| JP4405195B2 (en) * | 2003-08-01 | 2010-01-27 | 株式会社マキタ | Reciprocating power tool |
| CN103835208B (en) * | 2014-03-06 | 2016-02-03 | 中联重科股份有限公司 | Vibration reduction method of road roller, device for realizing vibration reduction method and road roller |
| CN108867613B (en) * | 2018-07-18 | 2020-06-05 | 宜昌城大建设有限公司 | Ramming machine capable of controlling steering |
| CN110630725B (en) * | 2019-09-27 | 2020-12-08 | 玛狮工程机械（合肥）有限公司 | Gear box and battering ram |
| CN112900205A (en) * | 2021-01-20 | 2021-06-04 | 浙江沧海建设有限公司 | Road construction tamping device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3007230A (en) * | 1959-12-03 | 1961-11-07 | Acme Scient Company | Power hand tool for die finishing and the like |
| DE1220647B (en) * | 1963-08-02 | 1966-07-07 | Wacker Hermann | Hand-operated, motor-driven work equipment with reciprocating work or. Flapping movement |
| DE1925870A1 (en) * | 1969-05-21 | 1970-11-26 | Vni I P Ki Mechanizirovannogo | Suddenly working rammer |
| US3626768A (en) * | 1969-09-02 | 1971-12-14 | Joseph J Dancsik | Tool drive assembly |
| DE2236371C2 (en) | 1972-07-25 | 1977-02-24 | Losenhansen Maschinenbau Ag | HAND-HELD TAMPER |
| DE3532174A1 (en) | 1985-09-10 | 1987-03-19 | Wacker Werke Kg | Tamping device for soil compaction |
| SU1617139A1 (en) * | 1988-08-09 | 1990-12-30 | Московское Научно-Производственное Объединение По Механизированному Строительному Инструменту И Отделочным Машинам | Compression-vacuum percussive machine |
| DE4307993C2 (en) | 1993-03-13 | 1997-09-04 | Delmag Maschinenfabrik | Soil compactor |
-
1997
- 1997-09-10 DE DE19739742A patent/DE19739742C2/en not_active Expired - Fee Related
-
1998
- 1998-08-25 EP EP98951314A patent/EP1012404B1/en not_active Expired - Lifetime
- 1998-08-25 WO PCT/EP1998/005391 patent/WO1999013165A1/en active IP Right Grant
- 1998-08-25 DE DE59803762T patent/DE59803762D1/en not_active Expired - Lifetime
- 1998-08-25 JP JP2000510939A patent/JP3851083B2/en not_active Expired - Fee Related
- 1998-08-25 US US09/486,840 patent/US6352004B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE19739742A1 (en) | 1999-03-18 |
| WO1999013165A1 (en) | 1999-03-18 |
| JP3851083B2 (en) | 2006-11-29 |
| EP1012404A1 (en) | 2000-06-28 |
| DE59803762D1 (en) | 2002-05-16 |
| US6352004B1 (en) | 2002-03-05 |
| JP2001515975A (en) | 2001-09-25 |
| DE19739742C2 (en) | 1999-10-21 |
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