US3343497A - Railway track tamping apparatus - Google Patents

Railway track tamping apparatus Download PDF

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Publication number
US3343497A
US3343497A US567637A US56763766A US3343497A US 3343497 A US3343497 A US 3343497A US 567637 A US567637 A US 567637A US 56763766 A US56763766 A US 56763766A US 3343497 A US3343497 A US 3343497A
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United States
Prior art keywords
tamping
pair
units
unit
tie
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Expired - Lifetime
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US567637A
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English (en)
Inventor
John K Stewart
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Ivacan Inc
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Ivacan Inc
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Publication date
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Publication of US3343497A publication Critical patent/US3343497A/en
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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

Definitions

  • This invention relates to tamping devices for tamping the ballast beneath the ties of railroad tracks.
  • the art has been striving for many years to increase the production rate of maintenance vehicles, particularly tamping vehicles, for example it has been proposed to provide two tamping cars, one tamping the odd ties and one tamping the even ties, and it has been proposed to provide two sets of tamping heads on one vehicle so that one tamping head will tamp odd ties and the other tamping head will tamp even ties.
  • the present invention seeks to further increase the productivity of tamping vehicles by providing a tamping device mounted on a railroad vehicle for movement along the track, which tamping device comprises at least two pairs of tamping units arranged on the vehicle longitudinally of the track, all units being substantially in line with one another, each unit of each pair being spaced apart longitudinally of the track so as to span a tie therebetween; and the unit of one pair adjacent the unit of the other pair being spaced apart longitudinally of the track so as to span a tie therebetween; squeezing means for pivoting each unit of each pair towards the other unit of its pair and for pivoting the said adjacent units towards each other, whereby, in operation to impart a squeezing action to the ballast beneath the ties between each pair and to the tie between said adjacent units.
  • squeezing means for pivoting each unit of each pair towards the other unit of its pair comprises a hydraulic piston and cylinder arrangement.
  • FIGURE 1 is a schematic reproduction of a side view of a tamping device in accordance with the present invention.
  • FIGURE 2 is a detail plan view partially in section.
  • a railroad tamping vehicle V mounted on wheels W carries at the front thereof a tamping head comprising two pairs of tamping units for each rail of the track.
  • Each tamping unit is essentially the same as the tamping units described in my Canadian Patent No. 646,048 and comprises an electric motor 11 driving a depending crankshaft 12 (FIGURE 2), which through connecting rods 13 and rocker arms 14, oscillate the fork arms 15 of the tamping units at low amplitude high frequency, whereby to vibrate the ballast B when in contact therewith.
  • the tamping units are each mounted for pivotal movement about a vertical axis in collars 17.
  • the collars are attached by pivot pins P to bifurcated arms 19 of frames 20 so that the units are mounted in pairs for towardsand-away swinging action about pivot pins P and for up and down reciprocation in frames 20 along masts 24.
  • the reciprocating action may suitably be provided by hydraulic means in conventional fashion.
  • Hydraulic piston and cylinder arrangement 26, 26' are provided between each unit of each pair, the piston rod 27 of each arrangement being attached through a swivel bearing 28 to an inverted U shaped yoke 29 of a squeeze frame 30 secured to the unit 10, while the piston 31 of the arrangement is attached through swivel bearing 33 to a similar shaped yoke 35, secured to the other units of the pairs.
  • Hydraulic piston and cylinder arrangement 26 imparts a towards-and-away squeezing action to the tamping units W, X of one pair about their pivot pins P, whilst arrangement 26' imparts a towards-and-away squeezing action to the units Y, Z of the other pair.
  • the collars 17 provide for universal pivoting ofthe units during tamping whereby to compensate the tamping action of the pair beneath a tie T if one of the forks 15 of one tamping unit should encounter a snag. Stops S on stop bars 28 projecting outwardly of frames 20 limit the towards-and-away movement of the tamping units by contacting the yokes 29, 35.
  • the piston and cylinder arrangements 26, 26' also provide for a towards-and-away squeezing action between the unit X of the first pair of tamping units adjacent to the unit Y of the outer pair of tamping units.
  • one pair of tamping units W, X are lowered on its frame 20 into the ballast on either side of the tie A which lies between them and the other pair of tamping units Y and Z are simultaneously lowered into the ballast to span the tie C between them.
  • the units W, X and the units Y, Z squeeze together in paiis simultaneously under the action of the piston and cylinder arrangements 26, 26 to consolidate the ballast beneath the ties A and C.
  • the tamping units X and Y are squeezed together (as shown in phantom in FIGURE 1) by the combined action of the arrangements 26, 26 to consolidate the ballast beneath the tie B.
  • the tamping units Z and W move up against the inner stop S on stop bars 38 and remain there until the squeezing operation on the tie B has been completed.
  • the tamping units X and Y while being withdrawn from the ballast are returned to a central position, unit X between ties A and B and unit Y between ties B and C.
  • tie B could be tamped first by tamping units X and Y and ties A and C subsequently and simultaneously tamped by their respective pairs of units.
  • the device could be operated in more conventional fashion and the pair of tamping units W and X could tamp tie A simultaneously with the tamping of tie C by the units Y and Z and then the tamping vehicle could move to the right on withdrawal of the tamping units, which could again be lowered so that pair W, X could tamp tie B and pair Y, Z could tamp tie D.
  • At least one pair of tamping units say, W, X,could be made longitudinally adjustable in the vehicle frame.
  • Apparatus as claimed in claim 1 in which the squeezing means for pivoting each unit of each pair 30 towards and away from the other unit of its pair comprises a hydraulic piston and cylinder arrangement.
  • each tamping head comprises a pair of tamping units pivotally mounted on collars attached to a frame for vertical reciprocation relative to the track; yoke members extending from said tamping units; a hydraulic piston and cylinder arrangement connected on the one hand to the yoke of one unit and on the other hand to the yoke of the other unit and adapted on operation to pivot the tamping units towards and away from each other to provide a tamping operation on a tie between the tamping units, and means adapted to limit the pivotal movement of the units.
  • a method of tamping a railway track comprising tamping first and third ties with first and second tamping heads and thereafter tamping a second tie between said first and third ties using part of said first tamping head and part of said second tamping head.
  • first tamping head tamping a further tie immediately adjacent and on the other side of first mentioned tie with a second tamping FOREIGN PATENTS 205,532 10/1959 Germany.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
US567637A 1965-07-28 1966-07-25 Railway track tamping apparatus Expired - Lifetime US3343497A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32329/65A GB1132712A (en) 1965-07-28 1965-07-28 Improvements in or relating to railway track tamping apparatus

Publications (1)

Publication Number Publication Date
US3343497A true US3343497A (en) 1967-09-26

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ID=10336908

Family Applications (1)

Application Number Title Priority Date Filing Date
US567637A Expired - Lifetime US3343497A (en) 1965-07-28 1966-07-25 Railway track tamping apparatus

Country Status (6)

Country Link
US (1) US3343497A (de)
AT (1) AT302394B (de)
CH (1) CH438395A (de)
DE (1) DE1534022B2 (de)
FR (1) FR1486980A (de)
GB (1) GB1132712A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430579A (en) * 1966-03-15 1969-03-04 Australian Railway Equipment Tamping tool
US3465688A (en) * 1966-10-06 1969-09-09 Matisa Materiel Ind Sa Railway track ballast tamping machine
US3504635A (en) * 1968-01-15 1970-04-07 Canada Iron Foundries Ltd Workhead positioning means
US3595170A (en) * 1968-01-02 1971-07-27 Plasser Bahnbaumasch Franz Mobile track tamper
US4134342A (en) * 1976-09-16 1979-01-16 Nippon Kokuyu Tetsudo Ballast tamping apparatus
US20040069180A1 (en) * 2002-09-25 2004-04-15 Josef Theurer Machine and method for tamping a track

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE205532C (de) *
US2872878A (en) * 1955-12-23 1959-02-10 Plasser Franz Track tamping machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE205532C (de) *
US2872878A (en) * 1955-12-23 1959-02-10 Plasser Franz Track tamping machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430579A (en) * 1966-03-15 1969-03-04 Australian Railway Equipment Tamping tool
US3465688A (en) * 1966-10-06 1969-09-09 Matisa Materiel Ind Sa Railway track ballast tamping machine
US3595170A (en) * 1968-01-02 1971-07-27 Plasser Bahnbaumasch Franz Mobile track tamper
US3504635A (en) * 1968-01-15 1970-04-07 Canada Iron Foundries Ltd Workhead positioning means
US4134342A (en) * 1976-09-16 1979-01-16 Nippon Kokuyu Tetsudo Ballast tamping apparatus
US20040069180A1 (en) * 2002-09-25 2004-04-15 Josef Theurer Machine and method for tamping a track
US6865991B2 (en) 2002-09-25 2005-03-15 Franz Plasser Bahnbaumaschinen Industrie Gesellschaft Mbh Machine and method for tamping a track

Also Published As

Publication number Publication date
CH438395A (de) 1967-06-30
GB1132712A (en) 1968-11-06
FR1486980A (fr) 1967-06-30
DE1534022A1 (de) 1969-01-30
DE1534022B2 (de) 1976-10-07
AT302394B (de) 1972-10-10

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