EP0054529B1 - Vibrateur pour compacter le sol et analogue - Google Patents

Vibrateur pour compacter le sol et analogue Download PDF

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Publication number
EP0054529B1
EP0054529B1 EP81850239A EP81850239A EP0054529B1 EP 0054529 B1 EP0054529 B1 EP 0054529B1 EP 81850239 A EP81850239 A EP 81850239A EP 81850239 A EP81850239 A EP 81850239A EP 0054529 B1 EP0054529 B1 EP 0054529B1
Authority
EP
European Patent Office
Prior art keywords
shaft
vibrator
shafts
hydraulic
driven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81850239A
Other languages
German (de)
English (en)
Other versions
EP0054529A1 (fr
Inventor
Lennart Svensson
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.)
Vipac Vibrator AB
Original Assignee
Vipac Vibrator AB
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 Vipac Vibrator AB filed Critical Vipac Vibrator AB
Priority to AT81850239T priority Critical patent/ATE9109T1/de
Publication of EP0054529A1 publication Critical patent/EP0054529A1/fr
Application granted granted Critical
Publication of EP0054529B1 publication Critical patent/EP0054529B1/fr
Expired 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
    • E02D3/074—Vibrating apparatus operating with systems involving rotary unbalanced masses

Definitions

  • the present invention relates to a vibrator for vibrating soil.
  • a vibrator for compacting crushed rock, earth, sand, street and road paving materials and so on by means of vibrations there is used a vibrator comprising a bottom plate supported by the soil and a vibratory element supported by the bottom plate for transmitting vibratory motions to the bottom plate.
  • the vibratory element comprises two shafts rotatably driven by hydraulic motors in synchronism in opposite directions and each supporting one excentric weight. When driving the excentric weights in a rotational motion by means of the shafts there is imparted a vibratory motion to the vibratory element. By adjusting the relative position of the excentric weight it is possible to adjust the direction of the vibratory motion in a desired way.
  • a drawback in previously known vibrators of the kind described above is that the selector device for providing the changing of the relative position of the excentric weights is complicated and difficult to control. Of course, this provides a restriction of the total manoeuvrability of the soil vibrator which in turn reduces the possibilities of operating the vibrator close to obstacles of differents kinds.
  • a vibrator which by comprising an improved device for providing the changing of the relative position of the excentric weights presents an improved and simplified function and an improved manoeuvrability.
  • the vibrator according to the invention is characterized in that the vibratory element comprises two hydraulic motors each connected with one shaft, that the shafts are connected with each other by means of a device for transmitting the rotational motion of one shaft to the other shaft, a portion of the motion transmission device connected with one of said shafts is rotatable in relation to said shaft between two engagement positions positioned at an angle distance from each other, and that the vibrator comprises a control device for supplying a main flow of hydraulic fluid to either the one or the other of the two hydraulic motors, the shafts being on each occasion driven by only the one or the other of the hydraulic motors, the one shaft being thereby driven directly and the other shaft being driven indirectly through the motion transmission device, the portion of the motion transmission device rotatable in relation to its shaft thereby taking different engagement positions dependent on the shaft being driven directly by the hydraulic motor connected with this shaft or indirectly by the hydraulic motor connected with the other shaft for providing different relative rotational positions of the shafts and the excentric weights supported thereby.
  • control device can be formed as an electrically controlled selector valve which can be switched between two positions for supplying to either the one or the other hydraulic motor a main flow of hydraulic fluid in order to provide said adjustment or changing of the relative positions of the excentric weights.
  • the motion transmission device comprises two gears which engage each other, one gear being fixedly connected with one shaft and the other being connected with the other shaft in such a way that it is rotatable between two engagement positions positioned at an angle distance from each other.
  • the said construction of the vibrator solves the problem of self-synchronization present in vibrators of said kind.
  • the self-synchronization provides that the excentric weights take a position in which they are running in phase with each other and do not take the desired relative position in which the vibratory motions have the desired direction.
  • this self-synchronization will not appear as the hydraulic motor driven through the motion transmission device will provide a breaking action on the shaft connected therewith which in turn provides that the engagement positions which are required for obtaining the desired direction of the vibratory motions will be maintained on all occasions.
  • Figs. 1 a, 1 band 1 c are a side view, a plan view and a front view, respectively, of a vibrator according to the invention.
  • Figs. 2a and 2b are a plan view partly in section and a section along line II-II of Fig. 2a respectively of a vibratory unit included in the vibrator according to the invention.
  • Figs. 3a and 3b are schematic views of two different operative positions of a hydraulic drive system included in a vibrator according to the invention.
  • Figs. 4a and 4b show portions of an embodiment of a vibratory unit included in the vibrator according to the invention.
  • the vibrator according to the invention and shown in the drawings is intended for vibrating the soil and comprises a top portion 2 and a bottom portion 4 which are connected with each other by means of vibration absorbers 6 schematically shown.
  • the bottom portion 4 comprises a bottom plate 8 and a vibratory element 10 supported thereby.
  • the vibratory element 10 comprises two hydraulic motors 12 and 14 for driving the vibratory element.
  • the top portion 2 comprises a manoeuvring handle 16, a combustion engine 18 for driving a hydraulic pump 20 which is connected with the hydraulic motors 12 and 14 for the operation thereof, the top portion 2 also comprises a hydraulic oil tank having a filling device 24.
  • a suction line 26 From the hydraulic oil tank there extends a suction line 26 to the hydraulic pump 20.
  • a main pressure line 28 extends from the hydraulic pump 20 to an electrically operated selector valve 30.
  • From the selector valve 30 there extend a line 32 to the hydraulic motor 12 and a line 34 to the hydraulic motor 14.
  • the hydraulic oil pressure can be supplied either to the hydraulic motor 12 through the line 32 or to the hydraulic motor 14 through the line 34.
  • Return lines 36 and 38 extend from the hydraulic motors 12 and 14, respectively, and are connected with each other to a common return line 40 which extends back to the hydraulic oil tank 22 through a return oil filter 42.
  • a check valve 44 is connected between the line 32 and the return line 36, and a check valve 46 is connected between the line 34 and the return line 38.
  • a tank line 48 extends from the selector valve 30.
  • a pressure limiting valve 52 is connected between the main pressure line 28 and the tank line 48.
  • the manoeuvring handle 16 is connected with the top portion 2 of the vibrator by means of vibration absorbers 53 limiting the transmission of the vibratory motions of the vibrator to the handle.
  • the manoeuvring handle 16 is provided with a control element for starting and stopping the vibratory motion and a control element 56 in the form of a pressure switch for switching the selector valve 30 between forward and backward movement of the vibrator.
  • Figs. 2a and 2b are schematic views showing the construction of the vibratory unit 10 of the vibrator.
  • the vibratory unit comprises a vibratory housing 60 in which two shafts 62 and 64 are rotatably journalled. Each shaft 62 and 64 supports an excentric weight 66 and 68, respectively. The excentric weights 66 and 68 are fixedly connected with the shaft belonging thereto.
  • the shaft 62 supports a gear 70 unrotatably connected with the shaft.
  • the shaft 64 supports a gear 72 which engages the gear 70.
  • the gear 72 is rotatable in relation to the shaft 64 between two positions positioned at an angle distance of 180° from each other. In these positions there is an engagement between contact elements connected with the shaft and the gear, respectively.
  • the construction of the contact elements is not shown in Figs.
  • Switching of the selector valve 30 provides that the hydraulic oil pressure is supplied to the hydraulic motor 14 instead of to the hydraulic motor 12, in turn providing that the hydraulic motor 12 will rotate the shaft 64 so that the engagement between the contact portions of the shaft and the gear 72 is discontinued and is restored not until the shaft 64 and therewith the excentric weight 68 have been rotated over an angle of 180° from the position shown in Figs. 2a and 2b. In this new relative position between the excentric weights 68 and 66 the shaft 62 with its excentric weight 66 will be driven in synchronism with the shaft 64 and its excentric weight 68.
  • Figs. 3a and 3b there is shown the hydraulic system of the vibrator in the two relative positions between the excentric weights 66 and 68 described above.
  • the selector valve 30 is adjusted for directing hydraulic pressure oil from the hydraulic pump 20 and the pressure line 28 to the hydraulic motor 12 through the line 33. From the hydraulic motor 12 the hydraulic oil flows to the return line 36 and the return line 40 to the tank 22 through the oil filter 42. Thereby, the check valve 44 is in a closed position to direct the whole hydraulic oil flow through the hydraulic motor 12.
  • the hydraulic motor 14 is driven by the hydraulic motor 12 through the gears 70 and 72 and the shafts 62 and 64.
  • the hydraulic motor 12 acts as a pump and circulates hydraulic oil in the clockwise direction in the circuit constituted by the hydraulic motor 14, the line 38, the check valve 46 and back to the hydraulic motor 14.
  • a restriction 74 in the line 40 providing substantially the same flow resistance as the check valve 46 and the hydraulic motor 14. In this position of balance of the pressure drops in the system there is no return flow to the tank 22 through the line 34 and the line 48.
  • a pressure limiting valve 52 is provided between the pressure line 28 and the tank line 48.
  • the pressure resistance in the pressure line 28 and/or the lines 32 and 34 is too high an overflow takes place from the pressure line 28 to the tank 22 through the pressure limiting valve 52 and the tank line 48.
  • Fig. 3b the selector valve 30 is shown in a position for supplying hydraulic oil to the hydraulic motor 14 in order to drive this motor directly instead of directly driving the hydraulic motor 12.
  • the excentric weights 66 and 68 take another relative position than was the case when the hydraulic system was operated in accordance with Fig. 3a.
  • the hydraulic motor 12 is driven through the gears 70 and 72 and the shafts 62 and 64 for acting as a pump.
  • the hydraulic system is operated in equivalent ways in other respects in the positions shown in Figs. 3a and 3b there is not required any detailed description of the operation in the position shown in Fig. 3b.
  • Fig. 4a is a plan view on an enlarged scale of a portion of the vibratory element of the vibrator
  • Fig. 4b is an end view of a detail of Fig. 4a.
  • the shafts 62a and 64a are journalled in the housing 10a by means of conventional bearings 76.
  • Each shaft 62a and 64a support an excentric weight 66a and 68a, respectively.
  • a gear 70a is fixedly connected with the shaft 66a.
  • a gear 72a is positioned on a stub shaft 78 on the shaft 64a.
  • a sleeve 80 supporting a substantially semi-circular disc 82.
  • the disc 82 is formed with semi-circular engagement surfaces 84 which are positioned at an angle distance of 180° from each other.
  • the sleeve 80 including the disc 82 is unrotatably connected with the stub shaft 78, while the gear 72a is rotatably positioned on the sleeve 80.
  • the gear 72a is provided with a pin 86 which is adapted to engage the engagement surfaces 84 of the disc 82.
  • the vibrator according to the invention is extremely easy to operate because of the fact that the whole operation is provided by switching a selector valve which in a simple manner is operated electrically and that the hydraulic oil so to say provides an adjustment function by means of servo-action. Additionally it is a great advantage that the vibratory element can be positioned completely enclosed as the vibrator is often operated in a dusty and smokey atmosphere.
  • the vibrator can be modified within the scope of the following claims.
  • the vibrator with more than one vibratory element, the elements thereby being positioned so that the vibrator is manoevurable for turning in the sidewise directions.
  • the selector valve 30 for manual operation instead of electric operation.

Landscapes

  • 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)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Road Paving Machines (AREA)
  • Soil Working Implements (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Claims (8)

1. Vibrateur pour tasser le sol comprenant une plaque de base (8) et un élément vibrant (10) supporté par cette dernière, l'élément vibrant comprenant deux arbres (62, 64) entraînés en rotation par des moteurs hydrauliques en synchronisme dans des directions opposées et chacun supportant une masse excentrée (66, 88), la position relative des masses excentrées pouvant être réglée pour communiquer à l'élément vibrant un mouvement vibratoire ayant une direction voulue, caractérisé par le fait que l'élément vibrant (10) comprend deux moteurs hydrauliques (12, 14), un des moteurs étant relié à chacun desdits arbres (62, 64), que les arbres (62, 64) sont reliés l'un à l'autre au moyen d'un dispositif (70, 72) destiné à transmettre le mouvement de rotation d'un des arbres à l'autre arbre, une partie du dispositif de transmission de mouvement reliée à l'un (64) des arbres pouvant tourner par rapport à l'arbre entre deux positions d'engagement qui se trouvent à une distance angulaire l'une de l'autre, et que le vibrateur comprend un dispositif de commande (30) pour fournir à l'un ou l'autre des moteurs hydrauliques (12, 14) un écoulement principal d'un fluide hydraulique, les arbres étant chaque fois entraînés uniquement par l'un ou l'autre des moteurs hydrauliques, l'un des arbres étant entraîné directement et l'autre arbre étant entraîné indirectement par le dispositif de transmission de mouvement, la partie du dispositif de transmission de mouvement qui peut tourner par rapport à son arbre prenant de ce fait des positions d'engagement différentes selon que l'arbre connecté à ladite partie est entraîné directement par le moteur hydraulique relié audit arbre ou indirectement par le moteur hydraulique relié à l'autre arbre afin de faire prendre des positions de rotation relatives différentes aux arbres et aux masses excentrées (66, 68) supportées par ces derniers.
2. Vibrateur selon la revendication 1, caractérisé par le fait que le dispositif de commande est constituté par une électrovalve (30) de sélection.
3. Vibrateur selon la revendication 1 ou 2, caractérisé par le fait que le dispositif de transmission de mouvement comprend deux pignons (70, 72) dont l'un est assujetti fixement à l'un (62) des arbres et dont l'autre est assujetti à l'autre arbre (64) de manière telle qu'il puisse tourner entre deux positions d'engagement situées à une distance angulaire l'une de l'autre, les pignons engrénant l'un avec l'autre.
4. Vibrateur selon la revendication 3, caractérisé par le fait que les positions d'engagement se trouvent à une distance angulaire de 180° l'une de l'autre.
5. Vibrateur selon la revendication 3 ou 4, caractérisé par le fait que le pignon (72) qui est assujetti de façon tournante à l'arbre (64) supporte un axe (86) qui est adapté pour engager l'une ou l'autre de deux surfaces d'engagement (84) formée sur une partie (82) assujettie de façon fixe à l'arbre, lorsque le pignon tourne par rapport à l'arbre.
6. Vibrateur selon la revendication 5, caractérisé par le fait que l'axe (86) et/ou les surfaces d'engagement (84) sont pourvus d'éléments absorbant les chocs.
7. Vibrateur selon l'une quelconque des revendications précédentes, caractérisé par un système hydraulique comportant des canalisations de retour qui, en aval des moteurs hydrauliques sont raccordées mutuellement à une canalisation commune (40) et que cette canalisation est pourvue d'une étranglement (74).
8. Vibrateur suivant l'une quelconque des revendications précédentes, caractérisé par le fait que le moteur hydraulique qui, chaque fois, est entraîné indirectement per se et/ou la structure de circuit dans lequel ledit moteur fonctionne contrecarre ledit entraînement indirect de manière que la position d'engagement voulue soit maintenue.
EP81850239A 1980-12-12 1981-12-11 Vibrateur pour compacter le sol et analogue Expired EP0054529B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81850239T ATE9109T1 (de) 1980-12-12 1981-12-11 Ruettelgeraet zum verdichten vom boden od. dgl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8008759A SE443387B (sv) 1980-12-12 1980-12-12 Vibrator for markvibrering
SE8008759 1980-12-12

Publications (2)

Publication Number Publication Date
EP0054529A1 EP0054529A1 (fr) 1982-06-23
EP0054529B1 true EP0054529B1 (fr) 1984-08-22

Family

ID=20342455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81850239A Expired EP0054529B1 (fr) 1980-12-12 1981-12-11 Vibrateur pour compacter le sol et analogue

Country Status (4)

Country Link
EP (1) EP0054529B1 (fr)
AT (1) ATE9109T1 (fr)
DE (1) DE3165713D1 (fr)
SE (1) SE443387B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343865A1 (de) * 1993-12-22 1995-07-13 Ammann Duomat Verdichtung Bodenverdichtungsgerät

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3248474A1 (de) * 1982-12-29 1984-07-12 Weber Maschinentechnik Gmbh, 5928 Laasphe Betaetigungsvorrichtung fuer die schaltkupplung umschaltbarer vibratoren von bodenverdichtern
SE453000B (sv) * 1986-06-27 1988-01-04 Dynapac Ab Vibrationsplatta
SE513650C2 (sv) * 1999-02-03 2000-10-16 Svedala Compaction Equipment A Vibratorplatta med ställbart avvibrerat handtag
GB2356235A (en) * 1999-11-13 2001-05-16 Benford Ltd Compactor machine
CN109577142A (zh) * 2018-12-05 2019-04-05 徐工集团工程机械股份有限公司 一种齿轮校正同步的垂直振动轮及其压路机
DE102023118809A1 (de) * 2023-07-17 2025-01-23 Wacker Neuson Produktion GmbH & Co. KG Bodenverdichtungsvorrichtung und phasenverstellbarer Unwuchterreger mit zwei angetriebenen Wellen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952193A (en) * 1953-09-09 1960-09-13 Frederick J Converse Soil compacting machine
US2938438A (en) * 1955-07-28 1960-05-31 Baldwin Lima Hamilton Corp Vibratory compactor
FR1473491A (fr) * 1966-03-19 1967-03-17 Zaklady Sprzetu Budowlanego Nr Dispositif vibrateur, notamment pour des compacteurs lourds du sol
DE1634477A1 (de) * 1966-03-24 1970-08-06 Buckau Wolf Maschf R Schalteinrichtung fuer einen Ruettelverdichter
US3505885A (en) * 1968-03-12 1970-04-14 Losenhausen Maschinenbau Ag Vibration generators
US3670631A (en) * 1970-12-28 1972-06-20 Clark Equipment Co Rotating vibrator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343865A1 (de) * 1993-12-22 1995-07-13 Ammann Duomat Verdichtung Bodenverdichtungsgerät

Also Published As

Publication number Publication date
ATE9109T1 (de) 1984-09-15
SE8008759L (sv) 1982-06-13
SE443387B (sv) 1986-02-24
EP0054529A1 (fr) 1982-06-23
DE3165713D1 (en) 1984-09-27

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