US3211064A - Pressure-operated mechanism - Google Patents

Pressure-operated mechanism Download PDF

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Publication number
US3211064A
US3211064A US412563A US41256364A US3211064A US 3211064 A US3211064 A US 3211064A US 412563 A US412563 A US 412563A US 41256364 A US41256364 A US 41256364A US 3211064 A US3211064 A US 3211064A
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United States
Prior art keywords
pressure
tools
fluid
hydraulic
source
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Expired - Lifetime
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US412563A
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English (en)
Inventor
Plasser Franz
Theurer Josef
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Individual
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Individual
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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

Definitions

  • the present invention relates to pressure-operated mechanism for varying the relative distance between two a-djacently mounted tools. More particularly, it is designed for conventional track tamping machines with pairs of cooperating tamping tools whose relative distance is varied for tamping ballast underneath track ties.
  • the pressure-operated mechanism comprises two hydraulic motors connected to respective ones of the tools, a source of hydraulic fluid, conduit means connecting each hydraulic motor to the hydraulic fluid source, and adjustable valve means in the conduit means for selectively supplying hydraulic fluid from the source to the hydraulic motors and for permitting the fluid to flow out of the motors back to the source.
  • the constant pressure source is a conventional fluid reservoir or blast box wherein a substantially constant fluid pressure is maintained automatically at a given level, pump means being provided for equalizing any pressure changes which may occur temporarily.
  • Such fluid pressure reservoirs are well known and require no further description.
  • the invention is shown applied to the conventional vibratory tamping tools of a track tamper, as described and illustrated, for instance, in our US. Patent No. 2,876,709. Since all but the driving mechanism for the tamping tools is conventional and may take the form of the US. patent, if desired, the structure of the tamper is not further described or illustrated, except inasmuch as it cooperates with the mechanism of the invention. Thus, there are indicated the tool holders 1 carrying tamping jaws 2 which, in a manner not shown and well known, are arranged to be immersed in the ballast adjacent a tie. When the tamping jaws are so immersed, the tamping tools are vibrated and moved towards each other to compact or tamp the ballast underneath the tie.
  • Vibration is effected by means of a cam shaft 4 which, upon rotation, imparts a reciprocating or vibratory motion to the tamping tool mounting arms 3, 3 which are linked to one of the ends of the tamping tools, as is well known and fully described, for instance, in the above patent.
  • the mounting arms interconnect the tools at one of their ends to maintain these ends at a fixed distance.
  • the pairs of tamping tools are mounted on a tamping tool carrier 7 which is moved up and down on the tamper machine frame to immerse thetamping tool jaws in the ballast and remove them therefrom during forward movement of the tamper on the track.
  • a pair of parallel guide rods 5, 6 are mounted on carrier 7 and support the tools for glidable movement on the rods when their relative distance is varied.
  • the pressure-operated mechanism for varying the relative distance between the two adjacently mounted tools comprises a pair of like hydraulic motors 9, 10 and a fluid pressure-operated means 19, 20 connected to respective ones of the tools.
  • a means is provided for linking each tool at a point intermediate its ends to the hydraulic motors and to the fluid pressure-operated means, respectively, this means being illustrated as a connecting piece 8 which is attached to the associated tool by pivotal connection 8.
  • the illustrated hydraulic motors each comprise a stationary cylinder member 1t and a piston member 9 gliding in the cylinder member.
  • the piston member is fixed to, or integral with, connecting piece 8 but it will be obvious that this may be reversed and the cylinder member may be movable with the connecting piece while the piston member is fixedly mounted on carrier 7, the cylinder and piston members always being glidable relative to each other.
  • a source of hydraulic fluid shown as hydraulic fluid storage tank 15 is connected to each hydraulic motor by suitable conduit means illustrated at 11.
  • An adjustable valve means 12 is arranged in the conduit means for selectively supplying hydraulic fluid from tank 15 to the hydraulic motors and for permitting fluid to flow out of the motors back to the tank.
  • the illustrated hydraulic fluid delivery system includes a pump 14 whose input is connected to the tank 15 and whose output 13 leads to valve 12.
  • pump 14 delivers hydraulic fluid to the valve which directs it back to the tank through return conduit 16. Meanwhile, any hydraulic fluid displaced out of the hydraulic motors is permitted to flow back into the storage tank through valve 12 and return conduit 17.
  • a pressure-relief valve 18 is mounted in a branch conduit connecting return conduit 17 and delivery conduit 11 to set the maximum limit of pressure in conduit 11 and prevent excessive pressure from being applied to the tamping tools.
  • the fluid pressure-operated means illustrated herein also comprises a cylinder member and a piston member gliding in the cylinder member, the cylinder member 19 being fixed to, or integral with, one of the connecting pieces 8 while the piston member 20 is fixed to, or integral with, the other connecting piece 8.
  • this fluid pressure-operated means is mounted between the tools and maintains the same at a distance determined by the constant pressure supplied to cylinder member 19.
  • a conventional pressure fluid storage device 21 constituting a source of pressure fluid supplying pressure fluid to cylinder 19 under a substantially constant pressure through conduit 22.
  • the pressure fluid may be air, another suitable gas or a suitable fluid.
  • valve 12 When valve 12 is adjusted so that conduit 13 communicates with conduits 11, While the latter conduits are out of communication with return conduits 16 and 17, the hydraulic pressure in the hydraulic motors exceeds the constant pressure in cylinder 19 so that the tools are moved towards each other.
  • the constant pressure in cylinder 19 will move the tools apart and displace the hydraulic fluid in cylinders 10, 10, the displaced fluid being permitted to flow back to tank 15 through conduits 11 and 17.
  • the transverse cross sectional area of the piston members 9, 9, exceeds that of the piston member 20, which further increases the pressure diflerential between the hydraulic motors, on the one hand, and the pressure fluid-operated means 19, 20, on the other hand.
  • hydraulic fluid when hydraulic fluid is supplied to the hydraulic motors, they move the tools together against the constant pressure in cylinder 19 until the maximum pressure regulated by pressure-relief valve 18 is attained in the hydraulic motors or until the valve is adjusted to assume its illustrated position.
  • the connecting pieces 8 are held by the counter-pressure in cylinder 19 against undesirable vibration during the closing movement of the tools.
  • a pressure-operated mechanism for varying the relative distance between two adjacently mounted tools comprising two hydraulic motors connected to respective ones of said tools, a source of hydraulic fluid, conduit means connecting each hydraulic motor to said hydraulic fluid source, adjustable valve means in said conduit means for selectively supplying hydraulic fluid from said source to said hydraulic motors and for permitting said fluid to flow out of said motors back to said source, a fluid pressure-operated means mounted between said tools and connected thereto for maintaining said tools at a distance, and a source of pressure fluid supplying said pressureoperated means with pressure fluid under a substantially constant pressure, the pressure of the hydraulic fluid supplied to the hydraulic motors exceeding said constant pressure and moving said tools towards each other when the hydraulic fluid is supplied to the hydraulic motors, and the constant pressure moving the tools apart when the hydraulic fluid is permitted to flow back to said firstnamed source,
  • the pressure-operated mechanism of claim 1 further comprising a carrier for said tools, a pair of parallel guide rods mounted on said carrier and supporting said tools for glidable movement on said rods, means interconnecting the tools at one of their ends to maintain said ends at a fixed distance, and means for linking said tools at points intermediate their ends to said hydraulic motors and said fluid pressure-operated means, respectively.
  • each of the hydraulic motors comprises a cylinder member and a piston member in said cylinder member said members being glidable relative to each other, each tool being linked to one of said members of each motor
  • the fluid pressure-operated means comprises a cylinder member and a piston member gliding in the latter cylinder member, one of said latter members being linked to one tool and the other one of said latter members being linked to the other tool, and the transverse cross sectional area of the piston members in said hydraulic motors exceeding the transverse cross sectional area of the piston member in said fluid pressure-operated means.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Road Paving Machines (AREA)
US412563A 1963-11-29 1964-11-19 Pressure-operated mechanism Expired - Lifetime US3211064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT959963A AT258339B (de) 1963-11-29 1963-11-29 Hydraulisch betätigbare Einrichtung zur gegenläufigen Verstellung paarweise einander gegenüberliegend angeordneter Werkzeuge von Gleisstopfmaschinen

Publications (1)

Publication Number Publication Date
US3211064A true US3211064A (en) 1965-10-12

Family

ID=3615591

Family Applications (1)

Application Number Title Priority Date Filing Date
US412563A Expired - Lifetime US3211064A (en) 1963-11-29 1964-11-19 Pressure-operated mechanism

Country Status (5)

Country Link
US (1) US3211064A (de)
AT (1) AT258339B (de)
CH (1) CH414711A (de)
DE (1) DE1274606B (de)
GB (1) GB1019528A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092903A (en) * 1975-11-17 1978-06-06 Graystone Corporation Vibratory drive mechanism
US11053644B2 (en) * 2016-11-25 2021-07-06 Piasser & Theurer Export von Bahnbaumaschinen Gesellschaft m.b.H. Tamping unit for tamping sleepers of a track

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1460586A (en) * 1922-03-02 1923-07-03 Underfeed Stoker Company Hydraulic drive for stoker rams
US2483239A (en) * 1945-10-10 1949-09-27 John C Sharpe Multiple pressure fluid motor mechanism for pushing and pulling
US2876709A (en) * 1954-10-13 1959-03-10 Plasser Franz Track packing or tamping machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE810033C (de) * 1948-12-10 1951-08-06 Const Mecaniques Sa Renens Geleisstopfmaschine
AT182113B (de) * 1953-11-30 1955-05-25 Plasser Bahnbaumasch Franz Einrichtung bei Geleisstopfmaschinen zum gegenseitigen Verstellen paarweise angeordneter Stopfwerkzeuge
DE1084288B (de) * 1957-10-10 1960-06-30 Alois Ripper Dipl Ing Kraftangetriebener Gleisruecker
AT209933B (de) * 1958-12-02 1960-07-11 Plasser Bahnbaumasch Franz Gleisstopfmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1460586A (en) * 1922-03-02 1923-07-03 Underfeed Stoker Company Hydraulic drive for stoker rams
US2483239A (en) * 1945-10-10 1949-09-27 John C Sharpe Multiple pressure fluid motor mechanism for pushing and pulling
US2876709A (en) * 1954-10-13 1959-03-10 Plasser Franz Track packing or tamping machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092903A (en) * 1975-11-17 1978-06-06 Graystone Corporation Vibratory drive mechanism
US11053644B2 (en) * 2016-11-25 2021-07-06 Piasser & Theurer Export von Bahnbaumaschinen Gesellschaft m.b.H. Tamping unit for tamping sleepers of a track

Also Published As

Publication number Publication date
AT258339B (de) 1967-11-27
GB1019528A (en) 1966-02-09
CH414711A (de) 1966-06-15
DE1274606B (de) 1968-08-08

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