• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Underneath railway track sleepers (3) is compacted by immersion and addition of vibrating compactors (7). The vibrations introduced into the ballast (3) during the compacting process are registered as a measure of the ballast compaction. This means that a homogeneously compacted track can be achieved even with different gravel properties.
    公开号:AT518195A1
    申请号:T34/2016
    申请日:2016-01-26
    公开日:2017-08-15
    发明作者:
    申请人:Plasser & Theurer Export Von Bahnbaumaschinen Gmbh；
    IPC主号:
    专利说明:

    [01] The invention relates to a method for compacting the ballast bed of a track by a vibrating compacting tool, as well as a tamping unit for compacting ballast.
    [02] According to AT 513 973 B1, a tamping unit for compacting ballast of a track is known. In this case, the position of a compacting Beistellenden Beistellzylinders is detected by means of displacement transducer. The actuation of the auxiliary cylinders is carried out by a displacement sensor. To achieve optimum ballast compaction, the oscillation amplitude and the oscillation frequency of the compacting tools are changed as a function of the supply position.
    [03] AT 515 801 B1 describes a quality figure for the hardness of the ballast. The auxiliary power of a side-by-side cylinder is shown as a function of a supply path and an indicator is defined by the energy consumption. Accordingly, the energy supplied to the ballast via the auxiliary cylinder is considered by this reference number. In this way, however, the energy lost in the system is not taken into account.
    However, much of the energy is used for accelerating and decelerating the compacting tool. This creates a dependency on the square incoming inertia and frequency of the vibrating compacting tool. Consequently, the said code is primarily dependent on the structural design of the compacting tool. Comparability with other compression tools is therefore not possible. The main disadvantage is that the code number does not permit any statement with regard to the degree of compaction of the ballast. In fact, you only get one measure for a specific compaction tool.
    [05] The object of the present invention is now to provide a method of the type mentioned above, with which an improved recognizability of achievable by the compacting tools ballast compaction is possible.
    Another object of the invention is also to provide a vibratory compacting tool having tamping aggregate which enables uniform crushing of the ballast.
    [07] The task which relates to a method is achieved according to the invention in that the vibrations introduced into the ballast during the compacting process are registered as a measure of the ballast compaction.
    [08] The invention features - with the advantageous exclusion of constructive energy losses - a registration of the energy transmitted directly into the ballast and thus a meaningful index for achieving an optimal ballast compaction lent possible. Thus, the maximum possible dynamic additional force can be found just below a threshold value. Consequently, the ballast is not destroyed by excessive compression and reliably precludes a very disadvantageous lateral drainage in the threshold longitudinal direction. By acquiring suitable process data, the additional time and supply force necessary for the desired compaction can be metered in a targeted manner.
    [09] The method features according to the invention can generally be used to improve equipment suitable for ballast compaction so that in each case an accurate statement (or index number) with regard to the achievable degree of compaction is possible. Thus, an optimal compression state can be achieved even with different track-bound compaction, stuffing and track stabilization machines.
    [0012] The further object mentioned above and referring to a tamping unit is achieved in that an acceleration sensor connected to a control unit is arranged on the tamping lever and / or on the compacting tool.
    With such a structurally very easy to implement optimization of a tamping unit required for the stuffing energy use is matched to the desired degree of compaction of the ballast and thus reduces its wear. With this invention, an automation of Stopfprozesses while achieving a homogeneous compression quality and homogeneous Schwellenauflager is possible.
    Further advantages of the invention will become apparent from the dependent claims and the drawing description.
    In the following the invention will be described with reference to an embodiment shown in the drawing. 1 shows a simplified side view of a tamping unit having two compacting tools which can be supplied to one another, FIG. 2 shows a schematic representation of a compacting tool and FIG. 3 shows acceleration signals.
    A simply illustrated in Fig. 1 Stopfaggregat 1 for Unterstopfen located below a track 2 gravel 3 a ballast bed consists essentially of two each about a pivot axis 4 pivoting Stopfhebeln 5. These are at a lower end 6 each with a to penetrate provided in the ballast 3 compaction tool or tamping 7 and connected at an upper end 8 with a hydraulic Beistellantrieb 9.
    Each Beistellantrieb 9 is mounted on a rotatable by an eccentric 10 eccentric shaft 11. This vibration vibrations are generated, which are transmitted via the Beistellantrieb 9, the stuffing box at 5 and the compacting tool 7 on the gravel 3 to be compacted. At the lower end 6 of each stuffing lever 5, an acceleration sensor 13 connected to a control unit 12 is arranged. This could alternatively be attached directly to the compacting tool 7.
    [16] In a further embodiment variant of the invention, which is not illustrated in more detail, the acceleration sensor could also be arranged on a compacting tool designed as a track stabilizer and displacing the track into vibrations.
    [17] With the aid of the acceleration sensor 13, the vibrations introduced by the compacting tools 7 into the ballast 3 during the compacting process are registered as a measure of the ballast compression. For this purpose, the acceleration forces acting directly on the compacting tool 7 are measured and supplied as an acceleration signal to the control unit 12.
    [18] The acceleration of the vibrating compacting tool or stuffing plug 7 serves as an input to the system for determining the compaction quality. Normally, this does not perform any harmonic motion but works in a non-linear mode. It will transfer the forces on the ballast 3 only in one direction, it may lead to a lifting of the ballast grains of the
    Pimple surfaces come. This creates jumps in the force curve that distort the harmonic acceleration signal.
    [19] During a supply movement, a maximum possible degree of compaction can be calculated with the acceleration sensor 13 within a time interval. It is thus possible to obtain the information that the ballast 3 located between the compacting tools 7 has not yet been compressed to a maximum degree corresponding to a specific value of the acceleration signal. If necessary, another stuffing process can be initiated. In an advantageous manner, it can also be documented that the degree of compaction has been produced homogeneously, in particular during a longer stuffing period.
    [20] The compacting tools 7, which act as exciters, form a vibratory system with the ballast 3 as a resonator. The resonance of the dynamic system is changed by the compression as the system's equivalent stiffness changes. With the aid of the frequency response of the dynamic system, the resonance frequency can be evaluated. It would also be advantageous to track the frequency of this resonant frequency.
    [21] As a basis for a harmonic content (OSG) and a power of a fundamental vibration (LGS) is used an output to the control unit 12 acceleration signal of the acceleration sensor 13. A power density spectrum or the spectral power density indicates the power of a signal relative to the frequency in an infinitesimal (threshold versus zero) wide frequency band.
    [22] The acceleration signals are deformed as soon as a load occurs. This is visualized by the calculation of the power density spectrum and summed up in the range below 50Hz for the power of the fundamental and above 50 Hz for the power of the harmonics.
    [23] The measure of ballast compaction is the harmonic content (OSG). The OSG of a harmonic sinusoidal fundamental signal of the acceleration is influenced by the nonlinear behavior of the feedback (reflection) of the ballast. The harmonic content is referred to as the dimensionless quantity and indicates the extent to which the power of the harmonics superimposes the power of the sinusoidal fundamental.
    [24] The results of an evaluation of the spectral power density (or PSD, derived from Power Spectral Density) are shown in FIG. The curve shown in FIG. 3a shows the acceleration signal with unloaded compacting tool 7, FIGS. 3b and 3c with medium or high compression (the time t is indicated on the x-axis and the acceleration on the y-axis). A comparison shows a significant change in the shape of the sine function. The spectral components of the acceleration signal increase in the harmonic range.
    The course of the spectral power density of the three acceleration signals presented is shown in Fig. 3d (x-axis corresponds to the frequency Hz, the y-axis the power density spectrum W / Hz). In the case of the curve shown in full line, the main frequency components are at 35 Hz. In the case of the curve marked with a dashed line, several higher frequency components occur and even more higher frequency components occur in the curve shown by dot-dash lines. These higher frequency components are responsible for the deformation of the originally sinusoidal acceleration signal.
    For the determination of the spectral power density time-limited portions of the acceleration signal are selected and fed to a calculation routine for the power density spectrum. This calculates the power density spectrum in the frequency band from 5 to 300 Hz.
    [27] The power density spectrum is then available as a function of the frequency: Sxx = F (2 * π * f) [28] The power is determined by integrating the spectral power density over the desired frequency range. It [29] determines the power of the fundamental (LGS) and the harmonic content (OSG) as follows:
    [30] [31] By dividing the power of the harmonic by the power of the fundamental vibration (LGS), the harmonic content (OSG), which correlates with the existing compaction in the ballast 3, is determined. This characteristic (OSG) indicates how large the power component of the harmonics is in the entire acceleration signal.
    [32] A cutoff frequency f1 between fundamental oscillation (LGS) and harmonic depends on the resonance frequency of the mechanical construction of the tamping unit 1 and is determined by the course of the power density spectrum (PSD).
    [33] The evaluation of an acceleration signal is described below. The individual measured variables for the auxiliary travel of the compacting tools 7 and their additional time are divided into several temporal sections. For the individual sections, the characteristic values for LGS and OSG are determined for the front and rear compacting tool 7 with respect to a working direction of a tamping machine. The compacting operation or the auxiliary movement of the compacting tools 7 can advantageously be terminated immediately as soon as the characteristic value OSG has reached a preset size.
    To determine an apparent power is a drive power of the eccentric 10. This is detected by the pressure curve metrologically and subtracted the reactive power of the Beistellantriebe 9, since the power is lost at this point.
    [35] An active power is necessary for the calculation of auxiliary forces of the compacting tools 7. Furthermore, the ballast force is determined by means of the measured acceleration of the compaction tool 7. This is an indication of gravel compaction. Basically, the working process ballast compaction can be divided into the following sections: immersion, addition and start-up of the compacting tool 7. The actual compaction process takes place during the addition.
    [36] During the supply movement of the compacting tools 7, the grain skeleton of the ballast 3 is rearranged. Thus, compression energy is transmitted from the compacting tool 7 to the ballast 3. Due to the energy absorbed in the ballast 3, the rearrangement of the grain skeleton takes place and, as a result, this leads to a reduction in the pore volume. If the ballast movement is completed below the threshold, the energy absorption of the ballast 3 is reduced. Then the introduced forces of the compacting tool 7 are reflected more or the opposite compacting tool 7 is slowed down more. The stiffness of the
    Schotters 3 increases with increasing compaction and the proportions in which energy is absorbed in the ballast 3 (damping) decrease. This results in a greater reaction force to an acting force of the compacting tools 7. Thus, if a good compaction of the ballast is achieved, an increased power consumption of the compacting tool 7 can be observed.
    [37] The measured value representative of the active power (the power consumed by the ballast) can be obtained in various ways. For example, the drive power can be measured via the torque and the rotational speed of the eccentric drive 10 and the reactive power consumed in the system itself can be subtracted therefrom.
    [38] Reactive power is generated on the one hand by internal friction losses and flow losses in the hydraulic system and also within the auxiliary drives 9, which also serves as force-limiting overload protection in the system. If the force limit is active, more reactive power is consumed. The reactive power can be done by measuring the power in the auxiliary drive 9. For this purpose, the resulting cylinder force and the speed that covers the piston rod relative to the Beistellantrieb 9, needed. The resulting cylinder force can be done by two pressure sensors in the auxiliary drive 9. A displacement transducer in the hydraulic cylinder can be used to determine the speed by differentiating the path once.
    [39] The reactive power of the auxiliary cylinder is determined by multiplying the measured pressures by the corresponding areas and the speed (differentiated path).
    [40]
    [41] The reactive power of the Beistellantriebes 9 is also dependent on the selected Beistelldruck. The total reactive power can be determined during commissioning as a function of speed, supply pressure and apparent power and stored in a multi-dimensional table in the computer. As a result, only the determination of the torque and the rotational speed is necessary for determining an impact force of the system. The power introduced into the ballast 3 can thus be calculated as follows: [42] ^ scäotter = ML * 2 * 7t * fian - [43] In the case of hydraulically driven compactors, it may be expedient to use the hydraulic pressure of the eccentric drive 10 for the calculation to use the torque or as a measured variable.
    [44] During initial commissioning of a compacting tool 7, the braking torque or torque loss can be determined via special test scenarios. The power that is transmitted to the ballast 3 is known at this point. The size of the compression force, which is an indication of the compression ratio generated, depends on the accelerations on the compacting tool 7. For the calculation of the ballast force, a replacement model of the corresponding implement, in the case of a tamping machine of the compacting tool 7, is necessary: [45] The dynamic equation of motion of the stuffing lever or picking arm 5 can be represented by the following moment equilibrium: [46]
    [47] Fhydr (see Fig. 2) can either be measured online (by fitting the two chambers of the Beistellantriebes 9 with pressure sensors), or be calculated on the drive power of the eccentric drive 10. The acceleration ap is measured.
    [48] For the next calculation step, the speed traveled and the travel of the compacting tool 7 are necessary. For the speed, the acceleration signal is integrated once and twice for the route.
    [49] The energy flowing into the ballast 3 during compression by the tamping pommel 7 can be described as follows: [50] ^ pimpleO-) ~ / FscAotter * ^ piekelO ·) * dt [51] The energy thus obtained describes the energy Energy absorption of the ballast 3 during the compression process and indicates a measure of the respective degree of compaction. If the energy input converges to a certain value, the ballast 3 can no longer be compressed. In order to make the degree of compaction in different types of compacting tools 7 comparable with each other, the impressed energy is normalized to the Stopfpickelfläche and in-use compacting tools 7 as follows.
    [52]
    [53] If the energy input converges to zero during compaction, a compaction force follows a deformation according to a linear spring characteristic. The ballast 3 absorbs no more energy and the physical behavior is like a stiffness and is used as a track ballast E-module.
    [54] The stiffness, which corresponds to the slope in a force-displacement diagram, indicates the elastic behavior of the ballast 3. The determination of the modulus of elasticity for the ballast 3 is calculated by means of a linear regression line with minimization of the root mean square.
    权利要求:
    Claims (13)
    [1]
    claims
    1. A method for compacting the ballast bed of a track by a vibrating compacting tool (7), characterized in that the introduced during the compacting process in the ballast vibrations are registered as a measure of the ballast compaction.
    [2]
    2. The method according to claim 1, characterized in that the compression tool (7) acting acceleration forces are measured and fed as an acceleration signal to a control unit (12).
    [3]
    3. The method according to claim 1 or 2, characterized in that the optimal gravel compaction acceleration signal determined by calculating the power spectral density (PSD) as the compressor setpoint and the compression process is automatically terminated upon reaching the desired compressor value.
    [4]
    4. The method according to claim 3, characterized in that for the determination of the spectral power density (PSD) time-limited sections of the acceleration signal are selected and fed to a calculation routine for a power density spectrum.
    [5]
    5. The method according to claim 3, characterized in that the power density spectrum in the frequency band of about 5 to about 300 Hz is calculated.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that one of a mechanical construction of the compacting tool () dependent limit frequency f1 between a fundamental (GS) and a harmonic (OS) of the acceleration signal is determined.
    [7]
    7. The method of claim 3 to 6, characterized in that a power of the fundamental (LGS) and the harmonic (LOS) is calculated by integration of the spectral power density (PSD) over a desired frequency range.
    [8]
    8. The method according to claim 7, characterized in that by dividing the power of the harmonic (LOS) by the power of the fundamental vibration (LGS) a correlating with the compaction of the ballast harmonic content (OSG) is determined.
    [9]
    9. The method according to claim 7, characterized in that by a multiplication of the power of the fundamental wave (LGS) with a function of an idle amplitude factor f fixed - a conclusion on a gravel condition enabling - aggregate utilization (sl) is determined.
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that from a pressure curve of an eccentric drive (10) or a Beistellantriebes (9) metrologically detected a drive power of the compacting tool (7) and this is reduced by the apparent power of the Beistellantriebe (9) in which an effective power available at the compacting tool (7) for compacting the ballast (3) is calculated.
    [11]
    11. The method according to claim 10, characterized in that one of the active power resulting compacting force of the compacting tool (stuffing force) compared to a resulting from the ballast compaction gravel reaction force and the Beistellbewegung the compacting tools (7) is automatically terminated after reaching a limit value.
    [12]
    12. Stopfaggregat for compacting located below a track gravel with about a pivot axis (4) pivoting Stopfhebeln (5), at a lower end (6) each with a penetrating into the ballast (3) provided compression tool (7) and at an upper end (8) with a Beistellantrieb (9) are connected, characterized in that on the stuffing lever (5) and / or on the compacting tool (7) with a control unit (12) connected to the acceleration sensor (13) is arranged.
    [13]
    13. Stopfaggregat according to claim 12, characterized in that the acceleration sensor (13) at the lower end of the Stopfhebels (5) is arranged.
    类似技术:
    公开号 | 公开日 | 专利标题
    AT518195B1|2017-11-15|Method for compacting the ballast bed of a track and tamping unit
    EP0486898B1|1996-05-01|Method and device for adjustment of working caracteristics of an impact mechanism to the hardness of the material to be destroyed
    EP3239398B1|2019-10-30|Tamping unit for a rail tamping machine
    EP2627826B1|2014-09-03|Method for determinig the rigidity and/or the damping of the region of a solidity
    EP3631087B1|2021-07-21|Method and device for compressing a track ballast bed
    DE102017006844B4|2019-04-11|Soil compactor and method for determining substrate properties by means of a soil compactor
    DE10028949A1|2002-03-07|Method and device for determining the degree of compaction in soil compaction
    DE102016004298A1|2016-10-13|Temperature-dependent autoadaptive compaction
    DE2228958C2|1983-10-20|Mobile track leveling tamping machine
    DE60303303T2|2006-07-20|FALL WEIGHT COMPRESSION
    EP3147406B1|2017-12-20|Measuring system and method for compression control and computer program with a program code for execution of the method
    WO2001081680A1|2001-11-01|Oscillation detecting device for compacting soil
    EP2458089A2|2012-05-30|Method and device for measuring soil parameters by means of compaction machines
    EP3176324B1|2018-09-26|Method for determining the compaction of a substrate
    DE102015002743A1|2016-06-23|Self-propelled construction machine and method for operating a self-propelled construction machine
    DE102018116317A1|2019-01-17|Method for compacting a ballast bed of a track
    DE102013212151A1|2014-12-31|Construction machine with a vibration unit
    EP0775337B1|1998-10-07|Hydraulic drive control system
    DE102010019053A1|2011-11-03|Compaction device i.e. vibration plate, for use in vibration machine for compaction of e.g. clay during construction of road, has evaluating device determining soil parameter for determining soil characteristics based on motion signal
    DE102016124106A1|2017-06-22|ADJUSTMENT OF COMPACTION EXPERIENCE USING VIBRATION SENSORS
    AT521798A1|2020-05-15|Method and device for compacting a ballast bed
    EP3712330A1|2020-09-23|Soil compacting device
    DE102016214133A1|2018-02-01|Method for determining a friction loss of a braking device
    DE2052250A1|1971-06-16|Process for the continuous determination of the compaction effect of vibrating rollers, Rutteiplatten and soil vibrating compactors during the compaction work
    同族专利:
    公开号 | 公开日
    US20190055698A1|2019-02-21|
    CA3007505A1|2017-08-03|
    JP6961601B2|2021-11-05|
    AT518195B1|2017-11-15|
    EA036197B1|2020-10-13|
    CN108603345A|2018-09-28|
    US10914040B2|2021-02-09|
    CN108603345B|2021-02-26|
    KR20180103880A|2018-09-19|
    WO2017129215A1|2017-08-03|
    EP3408450A1|2018-12-05|
    JP2019503441A|2019-02-07|
    AU2016389117B2|2022-01-27|
    EA201800294A1|2019-01-31|
    AU2016389117A1|2018-07-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0723616A1|1993-10-14|1996-07-31|Geodynamik H Thurner AB|Control of a compacting machine with a measurement of the characteristics of the ground material|
    EP0688902A1|1994-06-17|1995-12-27|Franz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H.|Continuous measuring method of the resistance to lateral displacement of a railway track|
    EP1164223A2|2000-06-16|2001-12-19|BOMAG GmbH & Co. OHG|Method and apparatus for determining the degree of compaction during soil compacting|
    EP1516961A1|2003-09-19|2005-03-23|Ammann Aufbereitung AG|Method for determining soil rigidity and soil compaction device|
    GB2451310A|2007-07-21|2009-01-28|Monition Ltd|Monitoring the maintenance condition of a tamping machine|
    AU2012398058A1|2012-12-27|2015-08-13|Acciona Infraestructuras, S.A.|Predictive method for analysing tampering equipment, and tampering equipment|
    CH501776A|1969-11-24|1971-01-15|Matisa Materiel Ind Sa|Method for compacting railroad ballast and device for its implementation|
    CH585314A5|1975-01-17|1977-02-28|Matisa Materiel Ind Sa|
    JPS5842321B2|1975-06-14|1983-09-19|Shibaura Eng Works Ltd|
    US4111129A|1976-03-31|1978-09-05|Canron Railgroup|Method and apparatus for the vibratory tamping of railway tracks|
    AT400162B|1990-02-06|1995-10-25|Plasser Bahnbaumasch Franz|METHOD AND TRACKING MACHINE FOR MEASURING THE CROSS SHIFTING RESISTANCE|
    DE59500114D1|1994-08-09|1997-03-27|Plasser Bahnbaumasch Franz|Tamping unit for track tamping machines for tamping two immediately adjacent sleepers|
    JP3382061B2|1995-05-31|2003-03-04|松下電工株式会社|Linear vibration motor|
    CN101798784B|2010-03-15|2015-07-29|同济大学|The devices and methods therefor of stabilizing ballasts in railway ballast bed|
    AT513277B1|2012-10-24|2014-03-15|Plasser Bahnbaumasch Franz|Machine for submerging a track|
    AT513973B1|2013-02-22|2014-09-15|System7 Railsupport Gmbh|Tamping unit for a tamping machine|
    CN103616192B|2013-12-06|2017-01-18|中联重科股份有限公司|Method and system for evaluating vibration comfort level of excavator|
    AT515801B1|2014-09-16|2015-12-15|System 7 Railsupport Gmbh|Method for compacting the ballast bed of a track|
    WO2017011775A1|2015-07-16|2017-01-19|Harsco Technologies LLC|Coil-oscillator vibration unit for rail workhead|
    AT518195B1|2016-01-26|2017-11-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Method for compacting the ballast bed of a track and tamping unit|
    AT519195B1|2016-10-04|2019-05-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Stopfaggregat and method for clogging of sleepers of a track|
    AT519219B1|2016-11-25|2018-05-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Stopfaggregat for clogging thresholds of a track|
    AT519738B1|2017-07-04|2018-10-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Method and device for compacting a ballast bed|AT518195B1|2016-01-26|2017-11-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Method for compacting the ballast bed of a track and tamping unit|
    AT520056B1|2017-05-29|2020-12-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Method and device for compacting a track ballast bed|
    KR102319047B1|2017-11-24|2021-10-29|한정희|Multi tie tamper for railway|
    AT520698B1|2017-12-07|2020-09-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Method and system for load monitoring of a tamping unit|
    AT520791B1|2017-12-21|2020-08-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Method for operating a tamping unit of a track construction machine as well as tamping device for track bed compaction and track construction machine|
    AT520771B1|2017-12-28|2020-08-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Method for operating a tamping unit of a track construction machine as well as tamping device for track bed compaction and track construction machine|
    AT522406A1|2019-04-11|2020-10-15|Plasser & Theurer Export Von Bahnbaumaschinen Gmbh|Tamping pick and method of tamping a track|
    CN111501436B|2020-04-30|2021-12-24|中国铁建重工集团股份有限公司|Hydraulic tamping device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA34/2016A|AT518195B1|2016-01-26|2016-01-26|Method for compacting the ballast bed of a track and tamping unit|ATA34/2016A| AT518195B1|2016-01-26|2016-01-26|Method for compacting the ballast bed of a track and tamping unit|
    CA3007505A| CA3007505A1|2016-01-26|2016-12-29|Method for compacting the ballast bed of a track, and tamping unit|
    AU2016389117A| AU2016389117B2|2016-01-26|2016-12-29|Method for compacting the ballast bed of a track, and tamping unit|
    EP16826704.5A| EP3408450A1|2016-01-26|2016-12-29|Method for compacting the ballast bed of a track, and tamping unit|
    EA201800294A| EA036197B1|2016-01-26|2016-12-29|Method for compacting the ballast bed of a track, and tamping unit|
    JP2018538840A| JP6961601B2|2016-01-26|2016-12-29|A method for compacting the ballast track bed, as well as a tamping unit|
    CN201680080130.8A| CN108603345B|2016-01-26|2016-12-29|Method for compacting ballast bed of track and tamping unit|
    PCT/EP2016/002185| WO2017129215A1|2016-01-26|2016-12-29|Method for compacting the ballast bed of a track, and tamping unit|
    US16/064,608| US10914040B2|2016-01-26|2016-12-29|Method for compacting the ballast bed of a track, and tamping unit|
    KR1020187019440A| KR20180103880A|2016-01-26|2016-12-29|A method for compressing a ballast bed of a track, and a tamping device.|
    [返回顶部]