Classifications

• • 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
  • E01C19/38—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 with means specifically for generating vibrations, e.g. vibrating plate compactors, immersion vibrators
• • 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

Definitions

• the invention relates to a vibration plate according to the preamble of claim 1 with a vibratable base plate by an excitation device.
• Such a base plate usually has a base plate, the underside of which acts flatly and vibratingly on the material to be compacted. Due to the high dynamic load, most base plates are made from massive, thick steel plates, which may be further stabilized by welded-on beams.
• a soil compaction plate is known in which the base plate is designed as a ribbed hollow plastic part which is filled with sand or water before use.
• This plastic base plate to be ballasted should have a lower noise level during soil compaction and should enable cheaper production.
• the ribs extend from an upper cover plate to the base plate and are in particular designed as an open-cell honeycomb structure.
• the honeycomb structure serves to increase the mechanical strength of the plastic component, and the open cell enables water and sand to be filled and distributed to ballast the base plate.
• the invention is therefore based on the object to provide a vibration plate with a vibratable base plate by an excitation device, the use of which does not result in severe grain refinement and whose smoothness is improved at the same time.
• the vibration plate according to the invention has a base plate which can be set in vibration by an excitation device and which, as load-bearing components, has at least one base plate, an upper plate and a cell structure arranged between the base plate and the upper plate, the base plate stiffening, the supporting components having a base plate form a rigidity at which the lowest natural frequency of the base plate is at least 2 to 5 times, preferably at least 3 to 4 times, the frequency of its oscillation.
• the supporting components are now connected to each other so that they form a body with very specific vibration properties.
• the running properties of a vibration plate always improve significantly when the load-bearing components at least stiffen the base plate in such a way that the lowest natural frequency of the base plate lies in the above-mentioned ranges of the frequency of its vibrations during soil compaction.
• high rigidity with low weight generates high natural frequencies, whereby the lowest natural frequency from the bandwidth of the natural frequencies of the base plate should reach a minimum value.
• Such a base plate oscillates longer with increasing compaction of the subsurface before it changes to irregular and undesirable wobbling or tilting movements.
• the base plate must be particularly light during the compression.
• the known structural components are used in a manner known from aircraft construction for stiffening and lightweight construction. This creates a particularly stiff, yet light base plate, which has the natural frequency values according to the invention.
• the cell structure is used to use a much thinner base plate or top plate than before.
• this construction allows the use of 4 to 8 mm thick steel plates, which results in a considerable weight saving compared to the known vibration plates made of steel.
• the vibration plate according to the invention therefore has a significantly lower vibrating mass. This has the advantage that the necessary amplitude to ensure adequate compression can be generated with lower centrifugal forces. Therefore, lower unbalance masses can be used, which in turn can be driven with a lower power. In this way the undesired grain refinements can be reduced and at the same time the excitation device can be operated more economically.
• the vibrating plate for compacting piles of a more general nature.
• Piling in this context means a loose structure with large pore spaces formed from more or less unequal and loosely arranged individual grains. By compression, this loose storage structure can be converted into a pore-filling, dense, low-void storage structure.
• the grains can e.g. Sand or gravel but also snow and ice crystals.
• the vibration plate according to the invention can also be used in the care and preparation of ski slopes, cross-country trails or ski jumping runs to achieve longer standing times without sinking into the snow. This area of application is not accessible to conventional vibratory plates due to the solid or molded design of the base plates and the resulting high weights.
• the vibration excitation of the base plate takes place with the aid of an excitation device.
• an excitation device e.g. a circular exciter or directional oscillator mounted on or in the base plate.
• excitation by a single exciter or by several hydraulically or mechanically synchronized exciters is also conceivable.
• continuous waves with one or more exciter weights can be used as a circular exciter or directional oscillator.
• Eccentrically mounted shafts can also be used here.
• the supporting components are welded together to form a self-supporting body.
• the welding of the base plate to the cell structure and the top plate creates an extraordinarily rigid body with further improved vibration properties, which can be handled easily during production.
• This lightweight design also allows a significantly wider version of the plates running orthogonally to the working direction.
• Base plates made of thin, high-strength steel with a width of approx. 2.25 m and a footprint of approx. 10000 cm 2 can be produced , which lead to a total weight of the vibration plate of less than 400 kg.
• the corresponding surface pressure of such a vibration plate is then only 0.4 N / cm 2 instead of the usual 5 N / cm 2 . It is fundamentally advantageous if the surface pressure of the vibrating plate is between 0.1 N / cm 2 and 3 N / cm 2 due to its own weight
• the dead weight of the vibrating plate is understood to mean the total weight of the vibrating plate that is ready for use. These include the weight of the base plate, the weight of the excitation device including the weight of any drives and / or suspension devices of the vibration plate.
• the surface pressure due to its own weight is the weight force resulting from its own weight, which the vibrating plate exerts on the flat floor surface it touches.
• the vibration of the base plate is optionally adjustable with a frequency between 30 Hz and 60 Hz.
• the frequency from 30 Hz to larger frequency values can be continuously, stepwise or fixed in one step. This frequency adjustment is particularly necessary when compacting piles, sand being compacted at around 60 Hz.
• the vibration of the base plate is optionally adjustable with an amplitude of more than 0.1 mm and less than 10 mm, preferably 5 mm.
• the setting of the amplitude from a value of 0.1 mm to larger amplitude values can also be carried out in one step, continuously or in steps.
• the base plate is reinforced in that it has at least one longitudinal beam welded to the cell structure as a further load-bearing component. This extends parallel and over a substantial part of a long side of the base plate.
• the long side of the base plate is understood to mean the longest side of the base plate.
• the longitudinal member significantly strengthens the base plate with regard to its bending and torsional rigidity.
• the cell structure welded to it is better held by the carrier, which in turn further increases the overall rigidity of the base plate.
• Particularly suitable carriers are made from closed, ring-shaped or box-shaped hollow profiles.
• the side member is arranged below the excitation device.
• the base plate is additionally stiffened, particularly in the highly stressed area below the excitation device, and at the same time the possibility is provided of attaching the excitation device to the base plate in a simple manner, for example by means of screwing, welding or riveting.
• the longitudinal member is designed as a frame lying on the base plate. This results in a significantly increased spatial stiffness of the side member itself, which can be further increased by welding the stiffening cell structure into the space enclosed by the frame.
• the individual cells of the cell structure each have a base area, the maximum lateral extent of which is 20 mm to 200 mm, preferably 56 mm to 162 mm.
• This very fine-cell structure allows the base plate to be made very thin due to the narrow support spacing of the cell walls, without this base plate, which is only 4 mm to 8 mm thin, bulging.
• the cell structure usually has at least partially closed cells with polygonal bases.
• the execution of the cell structure from partially closed cells leads to a further stiffening.
• the design with different polygonal bases has the advantage that the cell structure can also be adapted to more complicated geometries of the floor plan. Three, four, five, or six and more polygonal regular or irregular shapes are advantageous.
• the cell structure has cells with at least partially round base areas. This makes it possible to provide rounded base areas of the base plate with a cell structure. It is also advantageous for the cell structure to be produced from tubes, with individual tube sections simply being joined together. For this, e.g. circular cylindrical tubes can also be used.
• the cell structure has at least partially different cell shapes. This has the advantage that the stiffening effect of the cell structure can be varied over the base plate. This can be done to adjust the rigidity to the load situation.
• a cell structure with a particularly large number of small cells in areas with particularly high loads would be e.g. used on the edge of the base plate or in the area of vibration excitation. More complicated geometries of the base plate can also be produced with different cell shapes.
• the cell structure can be adapted to a drop-shaped cross section of the base plate.
• the cell structure preferably has closed cell side walls. This results in high rigidity and strength of the cell structure in the respective cell wall levels. At the same time, this enables a continuous welding of the cell structure to adjacent load-bearing components such as the base plate, the top plate or the side member.
• the weld seams are longer than in the case of an open-cell construction in which the cell walls have recesses in the wall base areas. This increases strength and allows thinner cell walls to be used.
• the cells are designed in such a way that planes of the cells parallel to the base area each have the same shape and area as the base area.
• the cells are preferably shaped in such a way that the cell side walls are essentially loaded by normal forces.
• the cell side walls are best arranged at right angles to the base plate or top plate to be supported and run straight away from there.
• the cell structure is expediently open at the top.
• the cell structure is preferably closed in regions from the top plate upwards. This coverage only in certain areas is usually carried out when other components of the vibration plate cover the cell structure upwards. In any case, the cell structure should be protected from the penetration of material to be compressed by means of other covers, if necessary.
• the top plate leads to a further stiffening of the base plate when firmly connected to the cell structure.
• the cell structure is also covered at the top so that no material to be compressed can accumulate in the cell structure.
• Weight changes due to accumulation of the material to be compacted cannot therefore lead to a change in the vibration properties of the vibration plate.
• the top plate also makes cleaning the vibration plate easier.
• a removable top plate is also advantageous.
• the underside of the base plate is provided with wear protection at least in some areas.
• wear protection can e.g. a coating of a suitable plastic that is glued to the base plate or else one that is
• the wear protection can be attached to the base plate, for example by screws, rivets or clamps.
• profile strips are attached to the outside of the base plate.
• this leads to a further stiffening of the base plate and, on the other hand, to a profiling of the substrate.
• profiles e.g. Trapezoid, triangle or wave profiles can be used.
• the attachment can e.g. by screwing, riveting, clamping or gluing to the base plate.
• the vibrating plate itself can be driven and provided with a handle so that it can be pushed or pulled vibratingly over the floor by a person in a generally known manner.
• a self-propelled vibration plate In an advantageous embodiment, however, the vibration plate has a vibration-insulated suspension for attachment to a self-propelled carrier device, which is connected to one of the supporting components of the base plate. It is then a non-self-propelled vibration plate. It is best to connect the suspension to the side member or to the base plate via the cell structure. The direct connection to the cell structure makes it possible to dispense with a further fastening element.
• the vibration isolation of the suspension can e.g.
• Such a self-propelled carrier device can e.g. a tractor, a snow groomer, a road construction vehicle or a single drum roller for tillage.
• the excitation device is attached to at least one of the supporting components of the base plate.
• the excitation device is attached to the side member as already described above.
• embodiments are also expedient in which the excitation device is attached directly to an optionally specially reinforced cell structure.
• a separate drive for the excitation device e.g. a gasoline engine is provided on the vibrating plate.
• a drive of the excitation device arranged on the vibration plate is dispensed with.
• the excitation device can be coupled to and driven by a drive of the self-propelled carrier device.
• the excitation device is then driven in the usual way by a hydraulic or mechanical drive.
• the excitation device has couplings e.g. for hydraulic lines or a drive shaft that can be connected to the corresponding mating couplings of the self-propelled carrier.
• the base plate has a working width substantially corresponding to its long side, which is at least approximately as wide as the self-propelled carrier device, is particularly advantageous.
• the working width should be wider than the lane of the carrier device.
• the vibration plate smoothes the traces left by the carrier device when the vibration plate is pulled behind the self-propelled carrier device.
• the vibration plate is aligned with its long side at right angles to the direction of travel.
• the vibrating plate has a compacting effect on the material beneath it. Because of the particularly wide embodiment, the vibration plate works particularly effectively.
• a vibration plate whose base plate has a cross section in which the region of the base plate lying at the front in the working direction is bent upwards together with a region of the top plate lying at the front is particularly well suited for compacting the aggregate.
• the bending of the base plate at the front in the working direction prevents the plate from digging into the material to be compacted.
• the top plate is also bent up, a cell structure can be arranged between the two plates. This gives the two very thin sheets bent upwards a good spatial stability.
• the base plate (2) preferably has a cross section in which the region of the top plate lying behind in the working direction is inclined downwards towards the bottom plate , So slip e.g. Snow or sand remains simply to the rear from the surface of the base plate.
• FIG. 1 shows the section A-A through a vibration plate reinforced with a cell structure
• FIG. 2 is a top view of part of the vibration plate shown in FIG. 1, showing the internal cell structure;
• Fig. 3 is a partial representation of the section B-B shown in Fig. 1 and Fig. 2
• Vibration plate 4 shows a cell structure with a rectangular base area
• FIG. 5 shows a cell structure with a triangular base area.
• FIG. 1 shows the section A-A through a vibration plate 1 for the compression and smoothing of ski slopes.
• This includes a base plate 2, which is stiffened with a cell structure 5,
• the base plate 2 contains, as load-bearing components, a base plate 3, an upper plate 4, an intermediate cell structure 5 and a longitudinal beam 8, all of which are made of steel.
• the excitation device 9 is fastened on the frame-shaped side member 8, which in turn is welded onto the base plate 3.
• the longitudinal member 8 extends over the entire longitudinal side of the base plate 2.
• the cell structure 5 in this embodiment consists of mutually perpendicular continuous and perpendicular cell longitudinal walls 6 and cell transverse walls 7, which are welded here to the base plate 2 and the top plate 4.
• the cell walls have a wall distance of 50 mm to 150 mm and have no openings. It is a closed-cell structure with hollow cells that are cuboid in the central area of the base plate.
• the cell walls 6, 7 are arranged more closely, since this area is particularly heavily loaded by the excitation shaft device.
• the cell structure 5 welded to the support 8 stabilizes the support 8 and, together with the base and top plates which are also welded on, forms a light, self-supporting body with high torsional and bending rigidity.
• the base plate 2 is bent upward on the front side in the working direction in order to press snow that accumulates in front of the vibrating plate under the vibrating plate and slide well over bumps.
• both plates are bent upwards and the interior space in between is reinforced with the cell structure 5 made of 3 mm thick steel sheets.
• the base plate 3 and the top plate 4 taper towards one another, a fold 15 of the base plate 3 forming the tip of the base plate 2 and at the same time forming a support for the top plate 4.
• the top plate 4 drops to the base plate 3, a very tight fold 16 of the base plate 3 forming a rear support for the top plate 4.
• the bottom plate 3 is provided on its underside with a wear protection 12 made of wear-resistant plastic. This is screwed to the base plate 3 and prevents damage to the base plate 3 e.g. through sharp stones sticking out of the snow.
• a cross-section mounted across the entire width of the direction of travel 13. This is also interchangeably attached and serves to further stiffen the end portion of the base plate 2 as well as profiling the compressed snow and stabilizing the Position of the vibration plate when gliding over the snow.
• the vibration plate 1 is attached to a preceding and self-propelled carrier device, such as a snow groomer in this case, and is pulled by it over the snow.
• the equipment carrier 10 of the snow groomer is used for suspension. This is attached to the vibration-insulated suspension 11 of the vibration plate 1 without making any modifications to the carrier device.
• the vibration plate 1 does not have its own drive for the excitation device 9. Instead, the excitation device 9 has a shaft 18 provided with a coupling 17, with which the excitation device can be coupled to a drive of the snow groomer and can then be driven by it.
• a hydraulic hose 19 with a coupling 20 serves to connect the excitation device 9 to the hydraulic system of the snow groomer.
• the variation of the cell structure 5 in size, shape and cross-sectional dimensions can be seen from the plan view shown in FIG. 2 of a part of the vibration plate shown in FIG. 1.
• the cell longitudinal walls 6 and also the cell transverse walls are arranged closer to one another.
• the edge of the base plate 2 is also provided with denser cell transverse walls 7.
• the remaining areas of the cell structure 5 have cells which are formed from thinner longitudinal cell walls 6 and in which the carrier walls 8 or the base plate 3 which is bent open at the front and rear form the transverse cell walls 7.
• the cell structure 5 is bounded on the side edges of the vibrating plate 1 by side walls 14, as can be seen in section B-B shown in FIG. 3.
• the profile strip 13 is a trapezoidal profile for producing a corrugated slope surface.
• the vibration-insulated suspension elements 11 are arranged between the multi-part excitation devices 9 and connected directly to the cell structure 5.
• the maximum lateral extent 22 of the base area 23 enclosed by the cell walls 6 and 7 corresponds to the outside distance of the most widely spaced and opposite cell side walls 6.
• the maximum lateral extent 22 of the base area 23 is the outside length 22 of the third and longest cell walls 21 running diagonally here.
• the maximum lateral extent thus corresponds to the inside diameter plus twice the wall thickness of the cell wall.

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• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Civil Engineering (AREA)
• Paleontology (AREA)
• General Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Soil Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Mining & Mineral Resources (AREA)
• Architecture (AREA)
• Agronomy & Crop Science (AREA)
• Road Paving Machines (AREA)
• Body Structure For Vehicles (AREA)
• Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
• Apparatuses For Generation Of Mechanical Vibrations (AREA)
• Secondary Cells (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
• Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

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• 2002
  • 2002-12-11 DE DE10257892A patent/DE10257892A1/de not_active Withdrawn
• 2003
  • 2003-12-10 DE DE50303996T patent/DE50303996D1/de not_active Expired - Fee Related
  • 2003-12-10 AT AT03785785T patent/ATE331083T1/de not_active IP Right Cessation
  • 2003-12-10 US US10/538,789 patent/US20060127190A1/en not_active Abandoned
  • 2003-12-10 EP EP03785785A patent/EP1570130B1/fr not_active Expired - Lifetime
  • 2003-12-10 CA CA002509069A patent/CA2509069A1/fr not_active Abandoned
  • 2003-12-10 WO PCT/EP2003/014012 patent/WO2004053232A1/fr active IP Right Grant

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