EP3902957A1 - Device for generating vibrations, soil compaction machine, and method for operating same - Google Patents
Device for generating vibrations, soil compaction machine, and method for operating sameInfo
- Publication number
- EP3902957A1 EP3902957A1 EP19832284.4A EP19832284A EP3902957A1 EP 3902957 A1 EP3902957 A1 EP 3902957A1 EP 19832284 A EP19832284 A EP 19832284A EP 3902957 A1 EP3902957 A1 EP 3902957A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic motor
- planetary gear
- generating vibrations
- gear
- unbalance
- 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.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 41
- 238000005056 compaction Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims abstract description 7
- 210000001520 comb Anatomy 0.000 claims 1
- 230000010355 oscillation Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
- E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll
-
- 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
- B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
- B06B1/161—Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied
- B06B1/162—Making use of masses with adjustable amount of eccentricity
-
- 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 invention relates to a device for generating vibrations for a soil compacting machine, in particular a self-propelled soil compacting roller. Furthermore, the invention relates to a soil compacting machine with at least one such device and a method for operating the device or the soil compacting machine.
- Generic soil compaction machines are, in particular, self-propelled soil compaction rollers, for example tandem rollers or single drum rollers.
- Soil compacting machines of this type are typically used in the construction of roads, paths and squares and comprise at least one compacting drum with which the soil is compacted during operation of the roller.
- the soil is compacted, for example, by the weight of the roller and the compacting drum.
- it is known to vibrate the compaction drum.
- Generic systems are disclosed for example in DE 10 235 976 A1 and DE 10 321 666 A1. Such systems, with adjustment options for both the oscillation frequency and the oscillation level, are, however, of complex construction and therefore involve high manufacturing costs.
- the device for generating vibrations for a soil compaction machine in particular a self-propelled soil compaction roller, a first imbalance and a second imbalance, each of which is rotatably mounted, comprises a first hydraulic motor which is designed to set the first imbalance in rotation , A planetary gear which is connected to the first hydraulic motor and via which the second unbalance can be driven, and a second hydraulic motor which is also connected to the planetary gear and which is designed to change the transmission ratio from the first hydraulic motor to the second unbalance via the planetary gear .
- the invention is now characterized in that a third hydraulic motor is present, which is also connected to the planetary gear and is also designed to change the transmission ratio from the first hydraulic motor to the second imbalance via the planetary gear.
- the first hydraulic motor drives the first imbalance directly and the second imbalance indirectly via the planetary gear.
- the transmission of the drive power from the first hydraulic motor to the second unbalance can be regulated by the planetary gear, in particular by using the second and third hydraulic motors.
- the first imbalance always rotates at the speed or frequency with which the first hydraulic motor also rotates.
- the oscillation frequency of the entire arrangement can be changed or adapted by regulating the running speed of the first hydraulic motor.
- the frequency of the second imbalance can be adjusted by the second and the third hydraulic motor by these hydraulic motors acting on the summation gear, here the planetary gear.
- the phase position of the second unbalance can be adjusted relative to the first unbalance, so that the total amplitude resulting from the rotation of both unbalances can be adjusted.
- the overall amplitude can be adjusted between its maximum value and zero by a phase shift between the first and the second unbalance from 0 ° to 180 °.
- the first hydraulic motor can drive the first unbalance via any direct drive train.
- the first hydraulic motor drives the first imbalance via an output shaft that penetrates the planetary gear.
- the first hydraulic motor is therefore directly or directly connected to the first imbalance via a single output shaft. Because this output shaft penetrates the planetary gear, a particularly space-saving and simple embodiment is achieved.
- a planetary gear typically comprises a sun gear and planet gears meshing with the sun gear and a ring gear meshing with the planet gears.
- the invention now provides that the planetary gear has a further ring gear which meshes with a further set of planet gears, the further planet gears also meshing with the sun gear of the planetary gear.
- the planetary gear according to the invention thus has a sun gear, two sets of planet gears and two ring gears.
- the ring gears are designed to be rotatable independently of one another.
- first planet gears of the planetary gear are designed to be drivable by the first hydraulic motor and a first ring gear is designed to be drivable by the second hydraulic motor, the first ring gear meshing with the first planet gears, and wherein the second imbalance is connected to the first planet gears meshing sun gear of the planetary gear can be driven.
- the first hydraulic motor therefore enters its drive power into the planetary gear via the first planet gears.
- the transmission ratio of this power to the sun gear can be adjusted by the second hydraulic motor via the first ring gear.
- the power to be transferred to the second imbalance therefore comes from the first hydraulic motor and runs via the sun gear.
- the sun gear of the planetary gear meshes with both the first planet gears and with second planet gears, the first planet gears meshing only with the first ring gear and the second planet gears only with a second ring gear, and the second ring gear from third hydraulic motor is drivable.
- the term "only” here refers only to the ring gears. Both sets of planet gears also mesh with the sun gear. However, it is important that each set of planet gears meshes with only one ring gear, the ring gears being independently rotatable.
- the second unbalance can be driven via the second planet gears meshing with the sun gear
- the power introduced by the first hydraulic motor to drive the second unbalance thus runs from the first hydraulic motor via the first planet gears to the sun gear and from there to the second planet gears which drives the second unbalance.
- the first hydraulic motor must be able to drive the two imbalances even at high speeds or in high frequencies.
- the second hydraulic motor and the third hydraulic motor are intended to rotate the two imbalances against one another, that is to say to change their phase position.
- the second and third hydraulic motors are operated as precisely as possible, especially at low frequencies, i.e. slow speeds. that can.
- the second hydraulic motor and / or the third hydraulic motor is an orbital motor.
- Orbital motors are characterized by a particularly good slow-running behavior and also offer advantages due to their small space requirement. By using orbital motors, the desired phase positions of the unbalances can be set exactly.
- the second hydraulic motor and / or the third hydraulic motor comprise a brake.
- the brake also improves the accuracy of small adjustments on the hydraulic motors.
- the brake can be used to lock the second and third hydraulic motors - and thus the ring gears - so that the entire power is transferred between the planet gears and the sun gear.
- the soil compacting machine has two devices for generating vibrations, as described above, which are designed to rotate in opposite directions.
- two devices for generating vibrations are provided in each compaction bandage of the soil compaction machine.
- the two unbalances of the one device for generating vibrations thus have an opposite direction of rotation to the two unbalances of the second device for generating vibrations.
- the amplitude of the vibration can be adjusted by adjusting the phase position of the unbalance of a device for generating vibrations.
- the superimposition of the two individual vibrations results in a directed overall vibration. The vibration power is therefore only introduced into the ground in one direction.
- This direction can also be varied depending on the application by changing the phase relationship of the two devices for generating vibrations with one another by briefly adjusting the rotational speed or frequency. In this way, both the amplitude of the resulting overall vibration, as well as its direction and frequency can be varied continuously by the device according to the invention.
- the above-mentioned object is also achieved by a method for operating a device for generating vibrations, in particular a device for generating vibrations described above.
- the method according to the invention comprises the steps: driving a first unbalance by a first hydraulic motor, driving a second unbalance by the first hydraulic motor via a planetary gear, adjusting the transmission ratio of the planetary gear between the first hydraulic motor and the second unbalance by a second hydraulic motor connected to the planetary gear is connected, and adjusting the transmission ratio of the planetary gear between the first hydraulic motor and the second imbalance by a third hydraulic motor which is connected to the planetary gear.
- the solution is achieved with a method for operating a soil compaction machine as described above, wherein the soil compaction machine has two devices for generating vibrations that are designed to rotate in opposite directions, and the two devices for generating vibrations each with the method described above for operating a device for generating vibrations are operated. All of the above-described features, effects and advantages of the device according to the invention for generating vibrations and the soil compaction machine according to the invention also apply in a figurative sense to the methods according to the invention.
- Figure 1 a side view of a tandem roller
- Figure 2 is a side view of a single drum roller
- Figure 3 a device for generating vibrations
- Figure 4 a flowchart of a method for operating a device for generating
- Figure 5 a flow chart of a method for operating a soil compaction machine.
- Figures 1 and 2 show soil compacting machines 1.
- the soil compaction machines 1 have a driver's cab 2 and a machine frame 3.
- the self-propelled soil compacting machines 1 comprise a drive motor 4 which, among other things, drives the undercarriage of the soil compacting machines 1.
- this comprises a front and a rear compacting drum 5.
- the single drum roller according to FIG. 2 has only a front compacting drum 5 and likewise comprises a set of wheels 6 at the machine's spot.
- the soil compacting machines 1 move in or against the working direction a over the soil 8 and thereby compact the subsoil.
- a device for generating vibrations 7 which comprises a drive train with a planetary gear 13 and a vibration exciter 24 with a first unbalance 25 and a second unbalance 26.
- the axes of rotation of the two unbalances 25, 26 lie one on top of the other, so that the unbalances 25, 26 rotate on concentric circles.
- two such devices for generating vibrations 7 are each arranged in the compaction bandages 5 of the soil compaction machines 1.
- the device for generating vibrations 7 comprises a first hydraulic motor 9, which drives an output shaft 14.
- the output shaft 14 is guided through a planetary gear 13 and drives a first imbalance 25, which is set in rotation via the output shaft 14.
- the rotational speed of the first unbalance 25 therefore corresponds to the rotational speed of the first hydraulic motor 9.
- the drive power of the first hydraulic motor 9 is also transmitted via the output shaft 14 and a drive link 16 connected to the output shaft 14 to a set of first planet gears 17 of the planetary gear 13.
- the first planet gears 17 mesh both with a sun gear 18 and with a first ring gear 19 of the planetary gear 1 3.
- the first ring gear 19 is in turn connected to a second hydraulic motor 10, so that the first ring gear 19 can be driven by the second hydraulic motor 10.
- the entire power coming from the first planetary gears 17 is transmitted to the sun gear 18 when the hollow wheel 19 is determined by the second hydraulic motor 10.
- this power can be set continuously to zero.
- the sun gear 18 also meshes with a set of second planet gears 22.
- These second planet gears 22 mesh also with a second ring gear 20 of the planetary gear 13.
- the second ring gear 20 is in turn connected to a third hydraulic motor 1 1 and can be driven by this. In this way, the drive power coming from the sun gear 18, which is available via the second planet gears 22, can be regulated continuously. If the third hydraulic motor 11 detects the second ring gear 20, for example, the entire power coming from the sun gear 18 is transmitted to the two th planet gears 22 and is available there.
- the second planet gears 22 are connected to an output web 23, via which the second unbalance 26 is set in rotation. The second imbalance 26 is thus also driven by the first hydraulic motor 9 via the drive path described above through the planetary gear 13.
- the second hydraulic motor 10 and / or the third hydraulic motor 11 are designed as orbital motors and each equipped with a brake 12. In this way, even small ideas for precise control can be realized.
- the brakes 12 can also be used to determine the hydraulic motors 10, 1 1, in order to lock the ring gears 19, 20.
- the two ring gears 19, 20 are connected to one another via bearings 21, in particular ball bearings.
- couplings 15 are provided at various points between the first hydraulic motor 9 and the vibration exciter 24.
- a clutch 15 is located on the output side immediately behind the first hydraulic motor 9.
- both the first unbalance 25 and the planetary gear 13 and thus the second unbalance 26 are decoupled from the drive by the first hydraulic motor 9.
- Uncoupling the water clutch 15 only separates the first unbalance 25 from the drive.
- Further clutches 1 5 are provided on the output web 23, which connect the second planet gears 22 with the second unbalance 26. The second imbalance 26 can therefore be uncoupled via these couplings 15.
- the vibration exciter 24 is designed such that the two unbalances 25, 26 rotate about the same axis of rotation.
- both unbalances 25, 26 of a device for generating vibrations rotate in the same direction of rotation.
- the second unbalance 26 is as Housing formed with a cavity in which the first unbalance 25 is received. From the drive shaft 14 of the first hydraulic motor 9 is thus guided into the cavity of the second unbalance 26 and supported against the second unbalance 26 with bearings 21, in particular ball bearings, so that the second unbalance 26 can move independently of the output shaft 14.
- the output shaft 14 drives the first unbalance 24 within the second unbalance 26.
- the phase position of the unbalance 25, 26 can be done by a brief adjustment of the transmission ratio of the planetary gear 13 by the second hydraulic motor 10 or the third hydraulic motor 1 1. In this way, the unbalances 25, 26 are rotated relative to one another. By adjusting the phase position of the rotating imbalances 25 and 26, the resulting amplitude of the oscillation can be continuously adjusted from zero to its maximum value. By adjusting the rotational speed of the first hydraulic motor 9, the excitation frequency of the vibration exciter 24 can be adjusted overall. If two devices for generating vibrations 7 are used simultaneously in a compression bandage 5, specifically in such a way that the unbalances 25, 26 of one device rotate in the opposite direction to that of the other device, a directional vibration can also be achieved in this way.
- Arrangement according to the invention can be represented by the use of two devices for generating vibrations 7, a directional oscillator, the direction, amplitude and oscillation frequency of which can be continuously adjusted from zero to the maximum value.
- FIG. 4 shows a flow chart of the method 27 for operating a device for generating vibrations 7.
- the method comprises the steps: driving 28 of the first unbalance 25 by the first hydraulic motor 9, driving 29 of the second unbalance 26 by the first hydraulic motor 9 via the planetary gear 13, adjusting 30 the gear ratio of the planetary gear 1 3 between the first hydraulic motor 9 and the second unbalance 26 by the second hydraulic motor 10, which is connected to the planetary gear 13, and adjusting 31 the gear ratio of the planetary gear 13 between the first hydraulic motor 9 and the second unbalance 26 by a third hydraulic motor 1 1, which is connected to the planetary gear 1 3.
- FIG. 5 shows a method 32 for operating a soil compaction machine 1 with two devices for generating vibrations 7.
- Each of the two devices for generating vibrations 7 is operated with a method 27 according to FIG.
- the method is identified by 27 '. It goes without saying that the two devices for generating vibrations 7 in the method 32 are also operated simultaneously.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Architecture (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018010154.2A DE102018010154A1 (en) | 2018-12-28 | 2018-12-28 | Device for generating vibrations, soil compaction machine and method for operation |
PCT/EP2019/000343 WO2020135922A1 (en) | 2018-12-28 | 2019-12-17 | Device for generating vibrations, soil compaction machine, and method for operating same |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3902957A1 true EP3902957A1 (en) | 2021-11-03 |
Family
ID=69137825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19832284.4A Pending EP3902957A1 (en) | 2018-12-28 | 2019-12-17 | Device for generating vibrations, soil compaction machine, and method for operating same |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220127798A1 (en) |
EP (1) | EP3902957A1 (en) |
CN (1) | CN113195832B (en) |
DE (1) | DE102018010154A1 (en) |
WO (1) | WO2020135922A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991008842A2 (en) * | 1989-12-20 | 1991-06-27 | GEDIB Ingenieurbüro und Innovationsberatung GmbH | Vibration generator |
DE29920093U1 (en) * | 1999-11-16 | 2000-03-16 | Mozdzanowski Joachim | Soil compactor with infinitely variable vibration amplitude |
US6769838B2 (en) | 2001-10-31 | 2004-08-03 | Caterpillar Paving Products Inc | Variable vibratory mechanism |
US7089823B2 (en) | 2002-05-29 | 2006-08-15 | Caterpillar Paving Products Inc. | Vibratory mechanism controller |
SE526893C2 (en) * | 2004-03-19 | 2005-11-15 | Dynapac Compaction Equip Ab | Device for vibrating a roller |
CN101598194A (en) * | 2009-07-03 | 2009-12-09 | 胡捷 | A kind of double powered variable transmission for electric automobile |
DE102009055950A1 (en) * | 2009-11-27 | 2011-06-01 | Hamm Ag | Compactor for compacting grounds, has movable drum rotatable around drum axle, where drum part of drum comprises vibration generator that is supported at distance from drum axle in drum |
CN103407435B (en) * | 2013-08-28 | 2016-06-08 | 江苏理工学院 | Hydraulic control type device for eliminating air loss energy consumption and improving low-speed performance of hydraulic retarder |
CN103438206B (en) * | 2013-09-16 | 2015-12-02 | 陕西中大机械集团湖南中大机械制造有限责任公司 | The hydraulic control ungraded amplitude device of vibratory roller |
CN207446716U (en) * | 2017-08-07 | 2018-06-05 | 重庆交通大学 | The stepless frequency conversion vibrator of planetary gear system |
-
2018
- 2018-12-28 DE DE102018010154.2A patent/DE102018010154A1/en active Pending
-
2019
- 2019-12-17 CN CN201980082227.6A patent/CN113195832B/en active Active
- 2019-12-17 US US17/312,149 patent/US20220127798A1/en active Pending
- 2019-12-17 EP EP19832284.4A patent/EP3902957A1/en active Pending
- 2019-12-17 WO PCT/EP2019/000343 patent/WO2020135922A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE102018010154A1 (en) | 2020-07-02 |
US20220127798A1 (en) | 2022-04-28 |
CN113195832A (en) | 2021-07-30 |
CN113195832B (en) | 2022-11-04 |
WO2020135922A1 (en) | 2020-07-02 |
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