US3910195A - Track tamper and leveler - Google Patents

Track tamper and leveler Download PDF

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Publication number
US3910195A
US3910195A US438264*A US43826474A US3910195A US 3910195 A US3910195 A US 3910195A US 43826474 A US43826474 A US 43826474A US 3910195 A US3910195 A US 3910195A
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Prior art keywords
track
tamping
ballast
tools
error signal
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US438264*A
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English (en)
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Josef Theurer
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Franz Plasser Bahnbaumaschinen Industrie GmbH
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Franz Plasser Bahnbaumaschinen Industrie GmbH
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/13—Packing sleepers, with or without concurrent work on the track
    • E01B27/16—Sleeper-tamping machines
    • E01B27/17—Sleeper-tamping machines combined with means for lifting, levelling or slewing the track
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/10—Track-lifting or-lining devices or methods
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/12—Tamping devices
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/16—Guiding or measuring means, e.g. for alignment, canting, stepwise propagation

Definitions

  • a controlled degree of ballast compaction is obtained with a mobile track tamping and leveling machine which comprises a track holding device holding the track at a leveled position under the control of an error signal from a reference system.
  • the ballast is compacted under the points of intersection between the track rails and ties by a pair of opposed vibratory tamping tools arranged for immersion in the cribs adjacent a tie and for reciprocation in the direction of track elongation, with the tie positioned between the opposed tools, and an additional vibratory tamping tool arranged for immersion in the ballast adjacent the end of the tie and for reciprocation in a direction transverse to the track elongation.
  • the ballast is pressed against the held track until it has reached a controlled degree of compaction, a control for regulating the compaction degree regulating the drives for reciprocation and vibration of the tamping tools.
  • the present invention relates to improvements in track surfacing operations, and more particularly in the tamping and leveling of a track consisting of rails mounted on ties having two elongated edges extending transversely of the rails and two ends extending in the direction of the rails, the rails and ties intersecting at points spaced in the direction of elongation of the track and the ties resting on ballast.
  • the elongated edges of adjacent ones of the ties define cribes therebetween, and the track is leveled or graded in relation to a reference system.
  • the ballast is compacted under the ties, and more particularly under the points of intersection, by vibratory pressure exerted upon the ballast under the ties inwardly from the two longitudinal tie edges whereby the progressively more compacted ballast raises the track, the track being independently lifted before and/or during the ballast tamping, if desired, until it has reached the leveled po sition determined by a reference system including a pickup and transmitter of an error signal for leveling the track in response to the error signal. While such track surfacing has been found quite useful, the desired degree of ballast compaction under the ties has not always been achieved because some ballast is displaced outwardly in a direction transverse to the track while it is squeezed by the vibratory pressure in the track direction.
  • the ballast is boxed in between the tamping tools substantially from the point of intersection of the rail and tie to the end of the tie, thus preventing the outward displacement of ballast during the tamping operation.
  • no control over the leveling of the track or the degree of ballast compaction is possible with such known track tampers because they neither comprise a leveling reference nor a tamping control.
  • the invention by holding the track in the leveled position determined by the reference system, the ballast being pressed against the held track until it has reached a controlled degree of compaction and the ballast being compacted under the points of intersection of the ties and rails by vibratory pressure exerted upon the ballast under the ties inwardly from the two longitudinal tie edges and from the tie ends whereby the progressively more compacted ballast raises the track.
  • the track may also be lifted independently of the ballast compaction before or during the compaction. This produces not only a high degree of accuracy in the track level but also an optimally and uniformly compacted ballast bed.
  • the track surfacing according to the present invention does not disturb the position of those ballast pieces whose sharp edges or corners bite into the underside of wooden ties when the track settles on the ballast bed, thus leaving the ballast enmeshed with the ties.
  • This is of particularly advantage in high-speed traffic sections where the passing trains have strongly settled the track, the method of this invention making it unnecessary to lift the track during leveling with the conventional track lifting mechanism and thus destroying the intermeshing relationship of the ties and ballast.
  • the ballast pieces remain undisturbed in their rela tionship to the undersides of the ties and are even pressed further into the undersides when the tamped ballast presses upwardly and/or held track.
  • the desired degree of compaction of the ballast is obtained by changing the amount and/or duration of the pressure and/ or the vibration of the tie end tamping tools in respect of the crib tamping tools. This is particularly useful where the operation must be adapted to different ballast conditions along a length of track.
  • the vibratory pressure from the end of the tie is increased in respect of that from the longitudinal edges of the tie, the upward pressure of the compacted ballast is correspondingly increased so that the track may be raised to a considerably larger extent only by the ballast tamping and without the need for independent track lifting.
  • a continuous operation for obtaining the desired optimal degree of ballast compaction will be obtained under all track conditions along a length of track if the track is raised to the leveled position solely by compaction of the ballast when the difference between the actual and leveled track position is small, and the track is also independently lifted when this difference is larger.
  • a mobile track tamping and leveling machine combines a known type of leveling reference system and a tamping tool assembly which comprises not only a pair of opposed vibratory tamping tools but also an additional vibratory tamping tool adjacent the tie end with a track holding device holding the track at the leveled position controlled by the error signal from the reference system. Furthermore, a control regulates the drive means for the reciprocation and for the vibration of the tamping tools to regulate the degree of ballast compaction.
  • the track will be leveled automatically and the ballast tamping will be terminated automatically when the optimal ballast compaction has been reached, the machine being readily adaptable by the control to differing ballast conditions while assuring long-lasting ballast compaction.
  • the control regulating means for the tamping tool drives has separate governors associated respectively with the drive means for the opposed tamping tools and the drive means for the additional tamping tool, which makes it possible to control the operation very sensitively in response to differing ballast conditions as the machine proceeds along the length of a track section. For instance, where the ballast bed is relatively loose (for instance after a ballast cleaning operation), lower pressures may be used for the crib tamping tools while higher pressures are used for the reciprocation of the end tamping tool to prevent outward displacement of ballast.
  • track lining means which includes a second reference system including a pickup and transmitter of an error signal for lining the track in response thereto, the latter error signal pickup and transmitter being coordinated with the control.
  • FIG. 1 is a schematic side elevational view of a ballast tamping and track leveling machine with a simple control system according to this invention
  • FIG. 2 is a top plan view of FIG. 1;
  • FIG. 3 is an enlarged perspective view of a tamping tool assembly with crib and end tamping tools arranged for the simultaneous tamping of two adjacent ties;
  • FIG. 4 is a simplified diagram of the control circuit for the operation of the crib and end tamping tools.
  • FIG. 5 is a diagram of the control circuit for operating the machine to tamp and level the track.
  • FIGS. 1 and 2 there is shown a mobile track tamper and liner whose elongated frame I is supported on undercarriages 2, 2 spaced apart to provide a long wheel base and running on a track constituted by rails 3 and ties 4 in a working direction indicated by horizontal arrow A, the track ties resting on ballast (not shown).
  • the tamping and leveling machine includes a first reference system including tensioned wire 5 extending from an end point in an uncorrected track section to an end point in the corrected track section. The end points of the reference wire are anchored to bogies running on the track and are vertically movable independently of machine frame 1.
  • a level signal pickup and transmitter 6 cooperates with the wire, such as a rotary coil or potentiometer. All of these structures and their operation are well known in track surfacing operations and, therefore, require no further description herein.
  • the tamping tool assembly or unit 7 illustrated herein is arranged for simultaneously tamping two adjacent ties 4, the assembly being mounted on machine frame 1 for vertical movement by means of hydraulic jack 24 so that the tamping tools may be positioned from an inoperative position into an operative or tamping position wherein the jaws on the lower ends of the tamping tools are immersed in the ballast underneath the ties.
  • the tamping tool assembly comprises two pairs of opposed vibratory tamping tools 8, which are termed crib tamping tools herein, which pairs of tools are so spaced from each other in the direction of elongation of the track that the tools of each pair which are adjacent to each other are at a smaller distance from each other than the distance between adjacent ones of the ties so that the two adjacent tamping tools enter into the same crib when the assembly is lowered,
  • the opposed vibratory tamping tools 8 of each pair are arranged for immersion in the cribs adjacent one of the ties and for reciprocation in the direction of track elongation, with the one tie positioned between the opposed tools of each pair.
  • Such a tamping tool assembly is described and claimed, for instance, in U.S. Pat. No. 3,357,366, dated Dec. 12, 1967 and U.S. Pat. No. 3,372,651, dated March 12, 1968.
  • the tamping tool assembly also includes additional vibratory tamping tools 9, which are termed end tamping tools herein, which are arranged for immersion in the ballast adjacent the ends of ties 4 and for reciprocation in a direction transverse to the direction of track elongation, i.e. towards the ends of the ties in the longitudinal direction thereof.
  • additional vibratory tamping tools 9 which are termed end tamping tools herein, which are arranged for immersion in the ballast adjacent the ends of ties 4 and for reciprocation in a direction transverse to the direction of track elongation, i.e. towards the ends of the ties in the longitudinal direction thereof.
  • Drive 10 which may include a rotary cam shaft, is operatively connected to tamping tools 8 for imparting vibration thereto and drive 11, which may also include a rotary cam shaft, is operatively connected to tamping tools 9 for imparting vibration thereto
  • Power means are also provided to reciprocate the tamping tools in a manner well known per se, such means including hydraulic cylinders, if desired, or rotary threaded spindles. Non-synchronous reciprocation of the crib tamping tools, such as shown in U.S. Pat. No. 3,357,366, for instance, will be preferred.
  • the machine frame also carries a track lifting and leveling unit 12 which may be of any suitable design, the illustrated unit including pairs of flanged railgripping rollers 15, 15 engaging each rail and mounted on a vertically movable carrier bracket which also carries hydraulic shoes supported on the ballast.
  • a track lifting and leveling unit 12 which may be of any suitable design, the illustrated unit including pairs of flanged railgripping rollers 15, 15 engaging each rail and mounted on a vertically movable carrier bracket which also carries hydraulic shoes supported on the ballast.
  • Ballast plows 13, 13 are arranged on the frame rearwardly of the tamping tool assembly, as seen in the working direction, the plows being mounted laterally adjacent the track and being vertically and transversely adjustable to enable ballast to be moved from the shoulder of the ballast bed to the region immediately adjacent the ends of the ties.
  • lining of the track by means of unit 12 is effected in respect of a second reference system 16 which cooperates with measuring signal pickup and transmitter 17 associated with the control for the hydraulic drives of the unit.
  • the resultant error signal is transmitted therefrom to relay 18 of control device 19 to close a switch in the control circuit.
  • Solenoid valves 20 and 21 are arranged in the control circuit and are actuated upon closing of the control circuit. Solenoid valves 20 and 21 are mounted in the hy draulic fluid supply lines leading from fluid supply tank 23 to the reciprocating drives for the tamping tools and to lifting cylinder 22, respectively.
  • the lifting cylinder is operatively connected to the carrier bracket of lifting and lining unit 12 and, when solenoid valve 21 is actuated by control device 19 triggered by an error signal, the valve is closed and further flow of hydraulic fluid from or to tank 23 is stopped. In this manner, jack 22 becomes a locking device holding unit 12 in its vertical position so that unit 12 becomes a track holding device.
  • hydraulic fluid is supplied to hydraulic jack 24 to lower tamping tool assembly 7 into its working position wherein the crib and end tamping tools 8 and 9 enter into the ballast, and actuation of valve 20 opens the same to permit the flow of hydraulic fluid from tank 23 to the hydraulic drives for reciprocating the tamping tools whereby the ballast is squeezed between the tools underneath the ties, pairs of crib tamping tools being mounted around the points of intersection between ties 4 and rails 3, as shown in FIG. 3, to assure particularly effective ballast tamping at these supports points of the track.
  • the supply of hydraulic fluid to the reciprocating drives i.e.
  • the control circuit may be inactivated so that the reciprocation of tamping tools 8 and 9 continues until the desired degree of ballast compaction has been obtained. Since such switching off of the control circuit will also leave unit 12 in its locked position at one side of the leveled track section and rear undercarriage 2 will transmit at least half the weight of the heavy machine to the track at the other side of the leveled track section, the same will be held or pinned down in the leveled position determined by reference system 5 while such additional tamping proceeds.
  • FIG. 3 shows the tamping tool assembly in greater detail, one such assembly being associated with each rail 3.
  • Each tamping tool assembly 7 is glidably supported on vertical posts on frame 1 and is vertically movable by hydraulic cylinder or jack 24 for tamping two adjacent ties 4 (shown in full lines).
  • the crib tamping tools 8 are immersed in the ballast alongside the longitudinal sides of the track ties while end tamping tools 9 are immersed in the ballast alongside the ends of the ties, thus effectively boxing in the ballast there-between and, most particularly, under the points of intersection between the ties and the rails.
  • Drive 10 vibrates tamping tools 9 and drive 11 vibrates tamping tools 8 so that they are vibrated in vertical planes substantially transverse and parallel to the track.
  • Hydraulic reciprocating drives 25 squeeze the tamping tools 8 of each pair together and move them apart while hydraulic reciprocating drives 26 move end tamping tools 9 towards and away from the tie ends, the well known non-synchronous tamping tool reciprocating drives being particularly useful for this purpose. Any other suitable drive may be used however, for reciprocating the tamping tools.
  • measuring signal pickup and transmitter 6 is mounted on a vertical rod running on rail 3 for free vertical movement in response to the level of the rail, as is conventional in track leveling reference systems of the illustrated type.
  • the tamping tools sur round the points of intersection of rail 3 and ties 4 so as to assure solid compaction of the ballast underneath these track support points while avoiding ballast tamping in the center of the ties and/or displacement of ballast towards the shoulders of the bed.
  • FIG. 4 shows the control circuit for hydraulic reciprocating drives 25 and 26 for crib tamping tools 8 and end tamping tools 9.
  • Constant speed pump 27 which has a relatively high capacity, for instance 200 liters of hydraulic fluid per minute, delivers hydraulic fluid from tank 23 through supply conduits to vibratory drives 10, 11 and reciprocatory drives 25, 26.
  • Solenoid valves 28 and 29 are mounted in a supply conduit coming from tank 23 and may be operated to direct the hydraulic fluid respectively to pressure adjustment device or governor 30 and to pressure adjustment devices or governors 31, 32.
  • Each of the pressure adjustment devices 30, 31, 32 comprises a pressure reducing valve, a pressure gage or manometer, and a check valve.
  • One supply conduit leads from pressure adjustment device 30 to the cylinder chambers of hydraulic motors 26 which face rail 3 for reciprocation of end tamping tools 9.
  • Another hydraulic fluid supply conduit leads from pressure adjustment device 31 to the two outer cylinder chambers of hydraulic motors closest to rail 3.
  • the two latter hydraulic motors 25 reciprocate the crib tamping tools 8 which are immersed in the crib between the two ties being tamped while the two former hydraulic motors 25 farthest removed from rail 3 reciprocate tamping tools 8 which are immersed in the two cribs bounding the two tamped ties.
  • the two facing cylinder chambers of hydraulic motors 25 closest to the rail are connected to pressure fluid reservoir 33 while the two cylinder chambers of hydraulic motor 26 which are farthest from rail 3 are connected to pressure fluid reservoir 34.
  • the pressure fluid supply from the reservoirs serves to return these tamping tools from their respective operative positions to their rest positions. Since the opening of these tamping tools may be effected at a speed slower than that required for squeezing these tamping tools during the tamping operation, a branch conduit supplies hydraulic fluid from tamk 23 to pressure reservoirs 33, 34 by means of a lower capacity pump which, for instance, delivers 60 liters of hydraulic fluid per minute.
  • Opening of the tamping tools actuated by the hydraulic motors farthest from rail 3 is effected by hydraulic fluid supplied to the outer cylinder chambers of the hydraulic motors 25 farthest from rail 3 through a branch conduit leading thereto from tank 23, pump 27 delivering the fluid through pressure reduction device or throttle 36 which is mounted in this branch conduit between pump 27 and motors 25.
  • pump 27 also delivers hydraulic fluid to pressure adjustment devices 37, 38 respectively connected to vibratory drives cylinder chambers of hy draulic motors 26 which face rail 3 for reciprocation of end tamping tools 9.
  • Another hydraulic fluid supply conduit leads from pressure adjustment device 31 to the two outer cylinder chambers of hydraulic motors 25 farthest removed from rail 3.
  • a still further hydraulic fluid supply conduit leads from pressure adjustment device 32 to the two outer cylinder chambers of hydraulic motors 25 closest to rail 3.
  • the two latter hydraulic motors 25 reciprocate the crib tamping tools 8 which are immersed in the crib between the two ties being tamped while the two former hydraulic motors 25 farthest removed from rail 3 reciprocate tamping tools 8 which are immersed in the two cribs bounding the two tamped ties.
  • the two facing cylinder chambers of hydraulic motors 25 closest to the rail are connected to pressure fluid reservoir 33 while the two cylinder chambers of hydraulic motors 26 which are farthest from rail 3 are connected to pressure fluid reservoir 34.
  • the pressure fluid supply from the reservoirs serves to return these tamping tools from their respective operative positions to their rest positions.
  • a branch conduit supplies hydraulic fluid from tank 23 to pressure reservoirs 33, 34 by means of a lower capacity pump 35 which, for instance, delivers 60 liters of hydraulic fluid per minute. Opening of the tamping tools actuated by the hydraulic motors farthest from rail 3 is effected by hydraulic fluid supplied to the outer cylinder chambers of the hydraulic motors 25 farthest from rail 3 through a branch conduit leading thereto from tank 23, pump 27 delivering the fluid through pressure reduction device or throttle 36 which is mounted in this branch conduit between pump 27 and motors 25. Through another branch conduit, pump 27 also delivers hydraulic fluid to pressure adjustment devices 37, 38 respectively connected to vibratory drives 10, 11.
  • Pressure adjustment devices 30, 31, 32 and 37, 38 are arranged to permit a reduction of the throughput as well as the pressure of hydraulic fluid to the hydraulic motors operative to reciprocate and vibrate the tamping tools.
  • Gage 39 for measuring and. preferably, indicating the throughput and pressure is associated with each pressure adjustment device. Such gages may be designed to measure the pressure, the pressure differential and/or the fluid throughput, and indicators are connected thereto to enable an operator to read the gaged pressure and/or fluid throughput.
  • the hydraulic fluid flow and pressure is regulated from central control 19.
  • a separate electric control circuit line connects each pressure adjustment device 30, 31, 32, 37, 38 and pressure throttle 36 to control 19.
  • the gage 39 of each pressure adjustment device transmits a signal corresponding to the gaged pressure and fluid throughput back to the control to facilitate the control of the operation by an operator at control 19. It may be useful for this control operation to provide additional gages in the hydraulic supply system.
  • the supply of hydraulic fluid to hydraulic motors 25 for squeezing the crib tamping tools 8 is controlled by solenoid valve 29 connected to control device 19 while the supply of hydraulic fluid to hydraulic motors 26 for squeezing the end tamping tools 9 is controlled by solenoid valve 28 also connected to control device 19, timing device 40 being arranged between the solenoid of valve 28 and control device 19 to delay or accelerate the operation.
  • the timing device comprises an adjustment element cooperating with a scale for adjusting the device.
  • the central control of the reciprocating and vibrating drives makes it possible to adjust the pressures of all tamping tools and the frequency of their vibrations rapidly and in proper cooperative relationship to adapt them to local operating conditions and so as to assure uniform tamping over long track sections, regardless of the extent of leveling required at different points.
  • FIG. 5 schematically shows control circuit 41 for the operation of crib and end tamping tools 8, 9 and track holding unit 12.
  • the error signal from reference signal pickup and transmitter 6 is transmitted to sum-and-difference amplifier 43 which comprises an adjustable resistance set to indicate the desired value, the error signal being compared with the set value in the amplifier.
  • the comparison signal is transmitted from amplifier 43 to stepping switch 44 whose switching steps are adjustable.
  • contact 45 is actuated in response to the comparison signal received, which contact places the drives for reciprocation of the tamping tools and for track holding unit 12 into a state of readiness.
  • switch 44 moves contact 45 into its lower position, shown in FIG.
  • switch 42 is operated to transmit the comparison or error signal directly to solenoid valve 47, which preferably is a servo valve.
  • solenoid valve 47 which preferably is a servo valve.
  • This valve is arranged in the hydraulic supply conduit leading from tank 23 to lifting cylinder 22 and opening thereof permits hydraulic fluid flow to the cylinder for lifting unit 12, and thus the track, in response to the error signal.
  • track lifting as well as reciprocation of the tamping tools is effected only when limit switch 48 affixed to the machine frame in the path of the vertical movement of tamping tool assembly 7 is tripped upon lowering of the tamping tool assembly, the limit switch being connected to relay 49 which actuates control switch 46 in the electrical connection between switch 42 and servo valve 47.
  • the relay also actuates control switches 57 for operation of the tamping tools so that, depending on the position of contact 45 controlled by switch 44, servo valve 47 controlling the track lifting or servo valve 50 controlling the tamping tool reciprocation is actuated.
  • the machine operation is controlled in the following manner:
  • servo valve 47 is closed and servo valve 50 remains open so that further lifting of the track will be effected only by compaction of the ballast by the squeezing tamping tools until the track has reached the desired level, closing of valve 47 locking unit 12 in in position so as to hold the track.
  • lifting of the track is accomplished solely by ballast compaction.
  • ballast compaction For this contingency, i.e. for the case of a small lifting stroke solely effectuated by ballast tamping, it is useful to mount a track holding mechanism 51 in the range of the tamping tool assembly so as to avoid raising the track above the desired level determined by the reference system 5.
  • track holding mechanism 51 comprises two hydraulic cylin' ders for vertically moving the mechanism relative to the machine frame.
  • the mechanism further includes means engaging the track rails.
  • a fluid flow blocking device 52 is mounted in the hydraulic supply conduit to the cylinders of track holding mechanism 51, this blocking device being actuated electromagnetically and the solenoid for the actuation of blocking device 52 being connected to contact 45 for operation when the contact has reached the illustrated middle position indicating the desired level of the track, i.e. the track is held by mechanism 51 at the desired level against further upward movement by tamped ballast. This avoids excess lifting of the track beyond the desired level during tamping.
  • limit switch 48 will open relay 49, thus opening control switches 57 and blocking device 52.
  • the amplifier and switches of the control circuit 41 are mounted on a panel to simplify the operation and possible repairs, the entire panel being replaceable in case of break-downs.
  • a throw-over switch is also mounted on the panel in the connection between amplifier 43 and switch 44, operation of switch 55 cutting out switch 44 and contact 45 from the control circuit and transmitting the error signal from the amplifier directly to servo valves 47 and 50, causing the track to be lifted solely by unit 12 and not by tamping of the ballast. It is also possible so to set switch 44 that the track will be lifted by unit 12 up to the desired level when the error signal exceeds the switching step and the tamping tools only tamp the ballast while, as previously explained, error signals smaller than the switching step set at switch 44 will cause track lifting solely by means of ballast tamping.
  • a master pressure gage 53 which is preferably associated with a pressure indicator, is mounted in the hydraulic supply conduit for the tamping tool drives so as to make it possible to obtain and control the desired degree of ballast compaction by squeezing of the tools.
  • Master switch 56 in the electrical control circuit is connected to pressure gage 53, a relay for the actuation of the master switch being responsive to a set maximum pressure to open the master switch and thus to interrupt a direct circuit controlling hydraulic fluid supply to the tamping tool drives.
  • This direct control circuit is in shunt with switch 44 and contact 45 so that ballast tamping is continued until the set maximum degree of ballast compaction against the counter pressure of track holding device 51 has been reached even when the track has been lifted to the desired level.
  • the master switch is constituted by an adjustable contact associated with the indicator of a contact manometer.
  • control 41 may be achieved by connecting the control circuit, and also control 19, if desired, to a suitable programmer 54 operating on an analog or digital computer basis, thus relieving the operator of any control function and enabling him to concentrate on adjusting the operating results.
  • Such a programmer will automatically control the degree of tamp ing, the tamping tool reciprocating times and pressures as well as the frequency and/or amplitude of the tamping tool vibrations in response to data transmitted to the programmer by the pressure adjustment devices and corresponding to the condition of the ballast.
  • data may be stored, for instance, on perforated bands or cards, or magnetic tapes.
  • a track surfaced with a tamping and leveling machine of the above described structure will be much more uniformly tamped than has been possible with conventional machines and will thus assure greater stability of the graded track. This will make it possible to increase the length of the time intervals between surfacing operation so as to obtain considerable economy in the maintenance of tracks of a high quality.
  • a mobile track tamping and leveling machine for obtaining a controlled degree of ballast compaction and leveling a track consisting of rails mounted on ties having two elongated edges extending transversely of the rails and two ends extending in the direction of the rails, the rails and ties intersecting at points spaced in the direction of elongation of the track and the ties resting on ballast, the elongated edges of adjacent ones of the ties defining cribs therebetween, comprising 1. a frame,
  • a reference system including a pickup and transmitter of an error signal for leveling the track in response to the error signal;
  • a tamping tool assembly vertically movably mounted on the frame for tamping a respective one of the ties, the tamping tool assembly comprising a. a pair of opposed vibratory tampingtools arranged for immersion in the cribs adjacent the one tie and for reciprocation in the direction of track elongation, with the one tie positioned between the opposed tools,
  • an additional vibratory tamping tool arranged for immersion in the ballast adjacent the end of the one tie and for reciprocation in a direction transverse to the direction of track elongation
  • control for regulating the degree of ballast compaction comprising a. regulating means for the drive means, said regulating means comprising separate governors associated respectively with the drive means for the opposed tamping tools and the drive means for the additional tamping tool.
  • the mobile track tamping and leveling machine of claim 1 further comprising a track lifting mechanism, the error signal controlling the track lifting mechanism.
  • the mobile track tamping and leveling machine of claim 1 further comprising a timing device associated with the regulating means for the drive means for the additional tamping tool.
  • the mobile track tamping and leveling machine of claim 1 further comprising a surface ballast Compactor associated with the additional vibratory tamping tool and spaced therefrom in the direction of track elongation.
  • the mobile track tamping and levelingmachine of claim 1 further comprising a ballast plow arrangement associated with the additional vibratory tamping tool and spaced therefrom in the direction of track elongation rearwardly of the additional tamping tool in the working direction of the mobile machine.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
US438264*A 1973-04-26 1974-01-31 Track tamper and leveler Expired - Lifetime US3910195A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT374273A AT336066B (de) 1973-04-26 1973-04-26 Fahrbare nivellier-gleisstopfmaschine und verfahren zum stopfen und nivellieren eines gleises

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US05/556,177 Division US4334479A (en) 1973-04-26 1975-03-06 Method and apparatus for obtaining a controlled degree of ballast compaction in the tamping and leveling of a truck
US05/556,177 Continuation US4334479A (en) 1973-04-26 1975-03-06 Method and apparatus for obtaining a controlled degree of ballast compaction in the tamping and leveling of a truck

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Publication Number Publication Date
US3910195A true US3910195A (en) 1975-10-07

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Application Number Title Priority Date Filing Date
US438264*A Expired - Lifetime US3910195A (en) 1973-04-26 1974-01-31 Track tamper and leveler
US05/556,177 Expired - Lifetime US4334479A (en) 1973-04-26 1975-03-06 Method and apparatus for obtaining a controlled degree of ballast compaction in the tamping and leveling of a truck
US05/914,678 Expired - Lifetime US4248155A (en) 1973-04-26 1978-06-12 Method for obtaining a controlled degree of ballast compaction in the tamping and leveling of a track

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US05/556,177 Expired - Lifetime US4334479A (en) 1973-04-26 1975-03-06 Method and apparatus for obtaining a controlled degree of ballast compaction in the tamping and leveling of a truck
US05/914,678 Expired - Lifetime US4248155A (en) 1973-04-26 1978-06-12 Method for obtaining a controlled degree of ballast compaction in the tamping and leveling of a track

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US (3) US3910195A (pl)
JP (1) JPS5749681B2 (pl)
AT (1) AT336066B (pl)
BR (1) BR7402011D0 (pl)
CA (1) CA1202823A (pl)
CH (1) CH571119A5 (pl)
DD (1) DD108336A5 (pl)
DE (2) DE2331915C3 (pl)
ES (1) ES419953A1 (pl)
FR (1) FR2227393B1 (pl)
GB (1) GB1453112A (pl)
HU (1) HU172054B (pl)
IT (1) IT1006862B (pl)
PL (1) PL93740B1 (pl)
RO (1) RO80845B (pl)
SE (1) SE394900B (pl)
SU (1) SU728725A3 (pl)
ZA (1) ZA742565B (pl)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090451A (en) * 1975-02-27 1978-05-23 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Mobile track tamping machine that tamps three successive cribs
US4127069A (en) * 1976-06-08 1978-11-28 Canron Corp. Railroad track shifting machine with shift limiting device
FR2449747A1 (fr) * 1979-02-26 1980-09-19 Plasser Bahnbaumasch Franz Machine a bourrer comportant une commande de la profondeur de bourrage
US4430945A (en) * 1980-09-04 1984-02-14 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Mobile tamping, leveling and lining machine
US4881467A (en) * 1987-09-04 1989-11-21 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Continuously advancing track maintenance or rehabilitation machine
FR2677678A1 (fr) * 1991-06-12 1992-12-18 Plasser Bahnbaumasch Franz Machine de bourrage.
US5205218A (en) * 1991-06-12 1993-04-27 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H Tamping machine and method for consolidating the ballast of a track
US20180010302A1 (en) * 2016-07-05 2018-01-11 Harsco Technologies LLC Apparatus and method for tamping ballast

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT345325B (de) * 1975-06-20 1978-09-11 Plasser Bahnbaumasch Franz Gleisstopfmaschine, insbesondere gleisstopf- und nivelliermaschine
AT346889B (de) * 1975-06-20 1978-11-27 Plasser Bahnbaumasch Franz Gleisstopfmaschine
AT339359B (de) * 1975-02-27 1977-10-10 Plasser Bahnbaumasch Franz Gleisstopfmaschine mit vorkopfverdichter
AT339360B (de) * 1975-08-25 1977-10-10 Plasser Bahnbaumasch Franz Fahrbare gleisstopfmaschine zum unterstopfen der querschwellen eines gleises
US4535700A (en) * 1981-02-17 1985-08-20 Canron Inc. Device for tamping railroad track adjacent the tie ends thereof
JPS58172775U (ja) * 1982-05-14 1983-11-18 小型ガス冷房技術研究組合 エンジン駆動ヒ−トポンプの排熱回収装置
JPS5988656U (ja) * 1982-12-08 1984-06-15 小型ガス冷房技術研究組合 エンジン駆動式空気調和機
JPS6013690U (ja) * 1983-07-08 1985-01-30 新明和工業株式会社 連続端子圧着機における電線保持装置
JPS6033455A (ja) * 1983-08-02 1985-02-20 三洋電機株式会社 冷凍装置
JPS60113462U (ja) * 1984-01-06 1985-07-31 サンデン株式会社 ヒ−トポンプユニツト
US4760797A (en) * 1985-02-20 1988-08-02 Southern Railway Company Method and apparatus for automated tie detection and tamping
IN166365B (pl) * 1985-03-25 1990-04-21 Plasser Bahnbaumasch Franz
ATE188755T1 (de) * 1995-03-07 2000-01-15 Plasser Bahnbaumasch Franz Stopfmaschine, maschineanordnung und verfahren zum unterstopfen eines gleises
AT500972B1 (de) * 2004-10-29 2006-05-15 Plasser Bahnbaumasch Franz Verfahren zum unterstopfen von schwellen
US8433462B2 (en) * 2010-06-30 2013-04-30 Harsco Corporation Drone vehicle
AT513973B1 (de) 2013-02-22 2014-09-15 System7 Railsupport Gmbh Stopfaggregat für eine Gleisstopfmaschine
AT514990B1 (de) * 2013-10-28 2015-08-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Stopfmaschine zum Unterstopfen eines Gleises
CN114277621B (zh) * 2021-12-03 2023-05-26 国能铁路装备有限责任公司 捣固车及其起道控制方法、控制装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969749A (en) * 1956-10-24 1961-01-31 Plasser Franz Mobile track tamping machine
US3651762A (en) * 1969-04-04 1972-03-28 Plasser Bahnbaumasch Franz Mobile track surfacing machine
US3807311A (en) * 1971-07-14 1974-04-30 Plasser Bahnbaumasch Franz Mobile track tamping and leveling machine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3071082A (en) * 1957-06-05 1963-01-01 Nordberg Manufacturing Co Tamper jack for railway track maintenance
US3143974A (en) * 1958-05-23 1964-08-11 Matisa Materiel Ind Sa Device for lifting railway tracks
CH355170A (fr) * 1959-10-07 1961-06-30 Matisa Materiel Ind Sa Dispositif pour limiter le déplacement et arrêter automatiquement un rail dans une position prescrite, dans un plan perpendiculaire à la voie, lors du calage d'une file de rails de voie ferrée
GB1154311A (en) * 1965-03-23 1969-06-04 Canron Ltd Railway Track Lifting Apparatus
US3545384A (en) * 1967-05-22 1970-12-08 Plasser Bahnbaumasch Franz Method and apparatus for correcting the position of a track
AT321347B (de) * 1968-01-02 1975-03-25 Plasser Bahnbaumasch Franz Fahrbare Gleisstopfmaschine
AT314581B (de) * 1969-07-24 1974-04-10 Plasser Bahnbaumasch Franz Bettungsverdichtmaschine
AT303105B (de) * 1969-07-24 1972-11-10 Plasser Bahnbaumasch Franz Auf einem Eisenbahngleis verfahrbare Maschine zur Verdichtung der Bettung
AT313347B (de) * 1970-04-17 1974-02-11 Plasser Bahnbaumasch Franz Fahrbare Nivellier-Gleisstopfmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969749A (en) * 1956-10-24 1961-01-31 Plasser Franz Mobile track tamping machine
US3651762A (en) * 1969-04-04 1972-03-28 Plasser Bahnbaumasch Franz Mobile track surfacing machine
US3807311A (en) * 1971-07-14 1974-04-30 Plasser Bahnbaumasch Franz Mobile track tamping and leveling machine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090451A (en) * 1975-02-27 1978-05-23 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Mobile track tamping machine that tamps three successive cribs
US4127069A (en) * 1976-06-08 1978-11-28 Canron Corp. Railroad track shifting machine with shift limiting device
FR2449747A1 (fr) * 1979-02-26 1980-09-19 Plasser Bahnbaumasch Franz Machine a bourrer comportant une commande de la profondeur de bourrage
US4312275A (en) * 1979-02-26 1982-01-26 Franz Plasser Bahnbaumaschi Nen-Industriegesellschaft M.B.H. Immersion depth control for ballast tamping tools
US4430945A (en) * 1980-09-04 1984-02-14 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Mobile tamping, leveling and lining machine
US4881467A (en) * 1987-09-04 1989-11-21 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Continuously advancing track maintenance or rehabilitation machine
FR2677678A1 (fr) * 1991-06-12 1992-12-18 Plasser Bahnbaumasch Franz Machine de bourrage.
US5205218A (en) * 1991-06-12 1993-04-27 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H Tamping machine and method for consolidating the ballast of a track
DE4218716C2 (de) * 1991-06-12 2001-09-20 Plasser Bahnbaumasch Franz Stopfmaschine
US20180010302A1 (en) * 2016-07-05 2018-01-11 Harsco Technologies LLC Apparatus and method for tamping ballast

Also Published As

Publication number Publication date
JPS5749681B2 (pl) 1982-10-23
BR7402011D0 (pt) 1974-11-05
US4334479A (en) 1982-06-15
IT1006862B (it) 1976-10-20
CH571119A5 (pl) 1975-12-31
AU6471074A (en) 1975-07-24
PL93740B1 (pl) 1977-06-30
CA1202823A (en) 1986-04-08
RO80845B (ro) 1984-08-30
DE2331915B2 (de) 1980-01-24
HU172054B (hu) 1978-05-28
ZA742565B (en) 1975-05-28
DE2331915C3 (de) 1980-09-18
DE2366203B1 (de) 1980-01-03
FR2227393A1 (pl) 1974-11-22
DE2366203C2 (de) 1980-09-18
SE394900B (sv) 1977-07-18
GB1453112A (en) 1976-10-20
US4248155A (en) 1981-02-03
SU728725A3 (ru) 1980-04-15
ATA374273A (de) 1976-08-15
JPS5048607A (pl) 1975-04-30
AT336066B (de) 1977-04-12
DE2331915A1 (de) 1974-11-07
RO80845A (ro) 1984-06-21
DD108336A5 (pl) 1974-09-12
ES419953A1 (es) 1976-04-16
FR2227393B1 (pl) 1977-08-26

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