US3146727A - Automatic control device for track tamping machines - Google Patents

Automatic control device for track tamping machines Download PDF

Info

Publication number
US3146727A
US3146727A US86703A US8670361A US3146727A US 3146727 A US3146727 A US 3146727A US 86703 A US86703 A US 86703A US 8670361 A US8670361 A US 8670361A US 3146727 A US3146727 A US 3146727A
Authority
US
United States
Prior art keywords
track
tamping
tamping tool
source
ballast
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US86703A
Other languages
English (en)
Inventor
Plasser Franz
Theurer Josef
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3146727A publication Critical patent/US3146727A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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

Definitions

  • oscillatory track tamping tools are mounted on a tool carrier which is vertically adjustable on the frame of the machine. During downward movement of the tool carrier, the tamping tools are forced into the loose ballast of the roadbed and tamp the ballast under the crossties, as they are moved toward each other and by their oscillations.
  • the machine is also equipped with a track lifting device, usually hydraulically operated, which lifts the track into a desired position prior to ballast tamping, and holds it in that position while the ballast is tamped under the track and the adjusted position of the track is thereby secured.
  • the reference point in relation to which the desired location of a track section is established prior to lifting is of neces sity located on the tamping machine itself and the progress of the track lifting operation is judged by observing the movement of an element moving with the track section, such as a portion of the lifting mechanism, against this reference.
  • the operation of the lifting device is similarly governed by the relative movement of the machine frame and of a member arranged to move with the track section which is being lifted. It is necessary, therefore, to maintain a fixed machine position during the lifting of a track section if a desired or corrected track position is to be reached.
  • the invention aims at generally improving the precision of track alignment and adjustment by providing automatic controls for machines of the type described. It is also concerned with reducing the vibrations transmitted by the tamping tools to the machine frame and to the machine elements supported thereon.
  • FIG. 1 is a fragmentary side elevational, partly sectional view of a track tamping machine equipped with the automatic control device of the invention
  • FIG. 2 diagrammatically illustrates the control device of FIG. 1 and its operation
  • FIG. 3 is a sectional front view of the track lifting device.
  • FIG. 1 there is seen the front end 1 of the track tamping machine of a basically known design.
  • the machine is supported on rails or tracks 7 by means of at least two pairs of wheels of which only one front wheel 30 is visible in the drawing.
  • the front end 1 overhangs the front wheels 30.
  • the front end 1 constitutes a frame about a transversely extending cavity in which two vertical posts 31 are spacedly mounted.
  • a tamping tool carrier 2 is vertically adjustable on the posts.
  • a transverse horizontal drive shaft 3 in the tool carrier 2 carries an eccentric 32 which causes oscillations of two arms 4 when the shaft 3 rotates.
  • the arms 4 are hinged to respective tamping tools 5 and actuate oscillations of the arms in a common vertical plane.
  • a hydraulic cylinder 6 is mounted on the tool carrier 2 and contains two pistons 33, the piston rods 34 of which axially project from opposite ends of the cylinder 6 and are pivotally secured to respective tools 5. Pressure fluid admitted to the two axial end portions of the cylinder 6 through the conduit 35 moves the pistons 33 towards one another and thus moves the tamping tools 5 against one another.
  • the tamping tool carrier 2 is near its lowest position on the posts 2 and the tools 5 are in their operative position in which the working faces of the tools penetrate into the ballast 36 on which the crossties 8 rest.
  • the level of the tracks is adjusted by means of jacks of which but one is seen in FIG. 1. It will be understood that the track tamping machine actually is equipped with at least two jacks for simultaneously adjusting the level of both rails of a railroad track. Track lifting devices of many known types are employed to advantage with the present invention and the jack illustrated is merely illustrative of such devices.
  • the illustrated jack is that shown in our Patent No. 2,847,943 and essentially consists of a cylinder 9 fastened to the front wall of the track tamping machine, a piston 10 axially slidable in the cylinder 9, a piston rod 11 downwardly projecting from the cylinder 9 and a gripping claw 12 mounted on the rod 11. Pressure fluid admitted to the chamber of the cylinder 9 through conduit 12 under the. piston It raises the piston, the piston rod 11 and thereby the claw 12 which lifts the track 7, this n9 constituting means for actuating the track lifting device 9, 10.
  • piston rod 11 extends outside cylinder 9 and has fixed to its free end a pivot 44 mounting the two jaws of the gripping claw.
  • the outer ends of the jaws are provided with friction linings 38 adapted firmly to grip the head of the rail 7.
  • Fluid pressure cylinder 39 is pivoted to one of the jaws and cooperating piston 40 is pivoted to the other jaw.
  • Fluid pressure fluid such as hydraulic fluid, is fed to the cylinder 39 through conduit 41 to operate the gripping claw 12.
  • the control system of the invention includes a cam 13 on the front wall of the tamping tool carrier 2 and a main operating means constituted by cam-operated switch 14 the actuating arm 15 of which projects into the path of the cam 13 which moves up and down with the tamping tool carrier.
  • the control system of the invention is better seen in the diagrammatic view of FIG. 2.
  • the main switch 14 is a snap action switch is spring-biased toward a normally open position and is seen in FIG. 2 in the closed position assumed when the cam 13 actuates the arm 15.
  • the switch 14 controls the output of a battery 16 with one pole of which it is connected by a conductor 16.
  • Conductors 17 and 18 constituting a first and second circuit branch lead from the switch 14 to respective terminals of two solenoid valves 20 and 21, the other terminals of which are jointly connected to the other pole of the battery 16 by a conductor 19.
  • An auxiliary push button switch 29, which constitutes an additional operating means, is arranged in the conductor 17 and permits the solenoid of the valve 29 to be operated independently of the position of the automatic main switch 14.
  • the hydraulic circuit of the jack consisting of the cylinder 9, piston 10, piston rod 11 and claw 12 is seen to include a positive displacement pump 23 connected to the cylinder 9 by the pressure conduit 22.
  • a suction line 24 supplies hydraulic fluid from a sump 25 to the pump 23.
  • a by-pass line 26 equipped with a pressure relief valve 27 connects the pressure conduit 22, and thus the output side or" the pump 23, with the sump 25.
  • the two valves 20 and 21 are serially arranged in the pressure conduit 22.
  • the first valve 20 is a shut-off valve spring-biased toward the closed position and opened only when its solenoid is energized.
  • the second valve 21 in a two-way valve. In the energized position illustrated it connects the valve 20 to the cylinder 9.
  • the valve When its solenoid is deenergized, the valve is shifted by a return spring 37 to a position in which it shuts oif the flow of fluid from the pump 23 to the cylinder 9 and vents the cylinder to the sump 25 by way of the return line 28.
  • the tamping tool carrier 2 moves on the posts 31 into a position near or at the lower end of its stroke, the tamping tools are in their operative position and the switch 14 is closed.
  • the cam 13 moves out of engagement with the actuating arm 15 of the switch 14 as soon as the working faces of the tools 5 are substantially withdrawn from the ballast 36.
  • the switch 14 is being closed during downward movement of the tool carrier 2 when the faces of the tools 5 enter the ballast 36.
  • Closing of the switch 14 permits the jack cylinder 9 to be supplied with fluid from the pump 23 but actual operation of the jack depends on actuation of the switch 29.
  • Lifting of the track 7 thus cannot be started until the tamping tools 5 are in operative contact with the ballast 36 and a substantially stable state of the machine is reached.
  • the operator may then establish the necessary length of the track lifting stroke of the piston and thereupon admit pressure fluid to the jack by pressing the button of the switch 2h.
  • release of the button of switch 29 L which is biased toward the open position by a spring (not shown) arrests the jack.
  • the track 7 is then held in the raised position by the jack until the upward movement of the tamping tool carrier 2 causes the switch 14 to be opened and the cylinder 9 to be vented to the sump 25 by the valve 21.
  • switch 29 may be automatically operated by servo devices responsive to a track level indicator but such servo devices are not part of this invention and will not be discussed in more detail.
  • the control device of this invention presents lifting of a track as long as the weight of the tamping machine is not partly supported on the tamping tools 5. It also prevents the free vibrations of the tamping tools from being transmitted to other parts of the machine which cooperate with the lifting device while the latter is in operation. When the working faces of the tools 5 are entered in the ballast, their vibrations are damped and partly absorbed by plastic deformation of the ballast.
  • a track lifting machine comprising, in combination:
  • valve means interposed in said conduit between said source of pressure fluid and said track gripping means, said valve means being movable between a conduit opening and closing position;
  • valve means consists of a first and a second valve, a first circuit branch leading from said main switch means to said first valve and a second circuit branch leading from said main switch to said second valve, and said auxiliary switch is connected in said first branch.
  • (0) tamping tool means mounted on the carrier for movement therewith towards and away from ballast supporting the track, the tamping tool means being embedded in the ballast in said low position of the tamping tool carrier;
  • a track lifting device consisting of a vertically movable rail gripping means mounted on the support for lifting the track oil the ballast;
  • control system for operating the track-lifting device moving means, the control system including References Cited in the file of this patent UNITED STATES PATENTS a source of electrical current, valve means including 10 2,847,943 Plasser et a1. Aug.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
US86703A 1960-02-16 1961-02-02 Automatic control device for track tamping machines Expired - Lifetime US3146727A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT120360A AT226267B (de) 1960-02-16 1960-02-16 Einrichtung an Gleisstopfmaschinen

Publications (1)

Publication Number Publication Date
US3146727A true US3146727A (en) 1964-09-01

Family

ID=3508836

Family Applications (1)

Application Number Title Priority Date Filing Date
US86703A Expired - Lifetime US3146727A (en) 1960-02-16 1961-02-02 Automatic control device for track tamping machines

Country Status (6)

Country Link
US (1) US3146727A (de)
AT (1) AT226267B (de)
CH (1) CH388362A (de)
DE (1) DE1129978B (de)
FR (1) FR1279178A (de)
GB (1) GB953580A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417522A (en) * 1980-06-04 1983-11-29 Franz Plasser Bahnbaumaschinen Industriegesellschaft M.B.H. Mobil track correction machine
US4542697A (en) * 1982-03-12 1985-09-24 Matisa Materiel Industriel S.A. Train for laying a new railroad track
US5025733A (en) * 1989-12-12 1991-06-25 Elio Pierobon Railroad support tie replacement device with track locking device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112727826A (zh) * 2020-12-23 2021-04-30 中国铁建重工集团股份有限公司 一种液压激振阀组

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1070661B (de) * 1956-06-26
DE1014140B (de) * 1955-06-08 1957-08-22 Plasser Bahnbaumasch Franz Stopfmaschine fuer Gleise mit Querschwellen
US2847943A (en) * 1955-10-25 1958-08-19 Plasser Franz Mobile railway ballast tamping machine with track lifting mechanism
FR1221502A (fr) * 1958-04-14 1960-06-02 Perfectionnements apportés aux machines mobiles à bourrer les voies de chemin de fer
US2990786A (en) * 1958-12-03 1961-07-04 Royce G Kershaw Apparatus for raising railroad tracks
US2996016A (en) * 1957-03-18 1961-08-15 Jackson Vibrators Tie and rail raising and tamping machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1014140B (de) * 1955-06-08 1957-08-22 Plasser Bahnbaumasch Franz Stopfmaschine fuer Gleise mit Querschwellen
US2847943A (en) * 1955-10-25 1958-08-19 Plasser Franz Mobile railway ballast tamping machine with track lifting mechanism
DE1070661B (de) * 1956-06-26
US2976816A (en) * 1956-06-26 1961-03-28 Plasser And Theurer Mobile railway ballast tamping machine
US2996016A (en) * 1957-03-18 1961-08-15 Jackson Vibrators Tie and rail raising and tamping machine
FR1221502A (fr) * 1958-04-14 1960-06-02 Perfectionnements apportés aux machines mobiles à bourrer les voies de chemin de fer
US2990786A (en) * 1958-12-03 1961-07-04 Royce G Kershaw Apparatus for raising railroad tracks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417522A (en) * 1980-06-04 1983-11-29 Franz Plasser Bahnbaumaschinen Industriegesellschaft M.B.H. Mobil track correction machine
US4542697A (en) * 1982-03-12 1985-09-24 Matisa Materiel Industriel S.A. Train for laying a new railroad track
US5025733A (en) * 1989-12-12 1991-06-25 Elio Pierobon Railroad support tie replacement device with track locking device

Also Published As

Publication number Publication date
AT226267B (de) 1963-03-11
CH388362A (de) 1965-02-28
GB953580A (en) 1964-03-25
FR1279178A (fr) 1961-12-15
DE1129978B (de) 1962-05-24

Similar Documents

Publication Publication Date Title
US3919943A (en) Track surfacing method
US4334479A (en) Method and apparatus for obtaining a controlled degree of ballast compaction in the tamping and leveling of a truck
US4563953A (en) Tamping head with limiting stop for tool reciprocation
US4417522A (en) Mobil track correction machine
US3146727A (en) Automatic control device for track tamping machines
US3949678A (en) Method for tamping and leveling track
US2847943A (en) Mobile railway ballast tamping machine with track lifting mechanism
US2156204A (en) Dipping machine
US3111909A (en) Mobile track tamper assembly
US4312275A (en) Immersion depth control for ballast tamping tools
US3895583A (en) Method and apparatus for tamping and leveling track
US1532107A (en) Broaching machine
US3127848A (en) Mobile track tamping machine
US3283374A (en) Semi-automatic machines for chill casting hollow parts such as pistons
US3381625A (en) Track raising apparatus
US2976816A (en) Mobile railway ballast tamping machine
US6634414B2 (en) Pressure die casting machine
US4270413A (en) Intermittent operation arrangement in a notching machine
US3135223A (en) Railroad track grading method and machine
US3103182A (en) Actuating and control system for a pressure fluid operated track displacement apparatus
US2734450A (en) Compacting press
US3568604A (en) Railroad track alignment method and apparatus
US2212289A (en) Mining machine
US3143974A (en) Device for lifting railway tracks
US3735437A (en) Upper roughing device