U.S. patent number 3,595,170 [Application Number 04/784,639] was granted by the patent office on 1971-07-27 for mobile track tamper.
Invention is credited to Franz Plasser, Josef Theurer.
United States Patent |
3,595,170 |
Plasser , et al. |
July 27, 1971 |
MOBILE TRACK TAMPER
Abstract
A mobile track tamper with a plurality of "twin" tamping tool
assemblies has means for controlling the movement of the assemblies
in the track direction in response to the location of a tie to be
positioned between the opposed tamping tools of each assembly.
Inventors: |
Plasser; Franz (Vienna,
OE), Theurer; Josef (Vienna, OE) |
Family
ID: |
3479034 |
Appl.
No.: |
04/784,639 |
Filed: |
December 18, 1968 |
Foreign Application Priority Data
Current U.S.
Class: |
104/12 |
Current CPC
Class: |
E01B
27/17 (20130101); E01B 2203/10 (20130101); E01B
2203/16 (20130101); E01B 2203/12 (20130101) |
Current International
Class: |
E01B
27/17 (20060101); E01B 27/00 (20060101); E01b
027/16 () |
Field of
Search: |
;104/7,7B,8,12,14 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: La Point; Arthur L.
Assistant Examiner: Bertsch; Richard A.
Claims
We claim:
1. A mobile track tamper for tamping ballast underneath a track
including rails supported on a plurality of spaced ties resting on
the ballast, said tamper comprising
1. a plurality of tamping tool assemblies mounted in spaced
relation in the direction of elongation of the track,
a. at least one of the tamping tool assemblies being movable in
said direction in relation to the tamper whereon it is mounted for
tamping a selected one of said ties by the movable tamping tool
assembly;
2. means for controlling the movement of the movable tamping tool
assembly in response to the location of the selected tie;
3. means for correcting the position of the track; and
4. a reference system for indicating the correct track
position.
2. The mobile track tamper of claim 1, wherein the means for
controlling the tamping tool assembly movement includes a tactile
element associated with the movable tamping tool assembly and in
contact with the track.
3. The mobile track tamper of claim 2, wherein the tactile element
is arranged for contact with a tie.
4. The mobile track tamper of claim 1, wherein the means for
controlling the tamping tool assembly movement includes a visible
control arranged to view the location of the one tie.
5. The mobile track tamper of claim 1, wherein the track position
correcting means includes a means for lifting the track, said track
lifting means being mounted on the tamper forwardly of the foremost
tamping tool assembly.
6. The mobile track tamper of claim 1, wherein the track position
correcting means includes a means for laterally shifting the
track.
7. The mobile track tamper of claim 6, wherein said lateral track
shifting means is vertically movable whereby it may be operated for
track lifting and shifting, said track lifting and shifting means
being mounted on the tamper forwardly of the foremost tamping tool
assembly.
8. The mobile track tamper of claim 6, wherein the lateral track
shifting means comprises a carrier, track engaging means mounted on
the carrier, and means for mounting the carrier on the frame for
lateral movement in respect of the frame.
9. The mobile track tamper of claim 1, further comprising a common
elongated frame for mounting the tamping tool assemblies.
10. The mobile track tamper of claim 1, wherein each assembly
includes two pairs of opposed tamping tools, said pairs of tools
being so spaced from each other in said direction 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
said ties, the opposed tools of each pair being arranged for
immersion in the ballast adjacent one of said ties and for
reciprocation in said direction, with the one tie positioned
between the opposed tools of each pair.
11. The mobile track tamper of claim 1, wherein each of the tamping
tool assemblies is independently movable in said direction, and the
means for controlling the movement of the movable tamping tool
assembly in response to the location of the selected tie controls
the movement of a first one of the assemblies, the movement of
successive ones of said assemblies being controlled in response to
the movement of the first assembly.
12. The mobile track tamper of claim 11, wherein each of the
tamping tool assemblies is independently movable in said direction,
and the means for controlling the tamping tool assembly movement
includes a tactile element associated with each assembly and in
contact with the track.
13. A mobile track tamper for tamping ballast underneath a track
including rails supported on a plurality of spaced ties resting on
the ballast, said tamper comprising
2. an elongated frame;
2. a plurality of tamping tool assemblies mounted on the frame in
spaced relation in the direction of elongation of the track for
movement in said direction in relation to the tamper whereon they
are mounted,
a. each tamping tool assembly being movable independently in said
direction for tamping a selected one of said ties;
3. a track shoe mounted on said frame and arranged for contact
with, and to exert a downward pressure on, the track, the track
shoe being arranged adjacent each tamping tool assembly for
limiting any upward movement of the track to a predetermined
distance;
4. means for controlling the movement of at least one of the
tamping tool assemblies in response to the location of the selected
tie;
5. means for correcting the position of the track; and
6. a reference system for indicating the correct track
position.
14. The mobile track tamper of claim 13, wherein the vertical
distance of the track shoe from the frame is adjustable, said
distance of the upward movement of the track being determined by
the adjusted distance of the track shoe from the frame.
15. The mobile track tamper of claim 13, wherein the track shoe is
mounted between two adjacent ones of said tamping tool
assemblies.
16. A mobile track tamper for tamping ballast underneath a track
including rails supported on a plurality of spaced ties resting on
the ballast, said tamper comprising
1. an elongated frame;
2. a plurality of tamping tool assemblies mounted on the frame in
spaced relation in the direction of elongation of the track for
movement in said direction, each assembly including
a. two pairs of opposed tamping tools, said pairs of tools being so
spaced from each other in said direction 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 said
ties, the opposed tools of each pair being arranged for immersion
in the ballast adjacent one of said ties and for reciprocation in
said direction, with the one tie positioned between the opposed
tools of each pair;
3. means for controlling the movement of at least one of said
tamping tool assemblies in response to the location of the one tie
which is to be positioned between the opposed tools thereof;
4. means for correcting the position of the track,
b. the track position correcting means including a means for
laterally shifting the track;
5. two running gears mounting the frame for mobility on the
track,
c. the tamping tool assemblies and the lateral track shifting means
being mounted on the frame between the running gears; and
6. a reference system for indicating the correct track
position.
17. The mobile track tamper of claim 16, wherein the lateral track
shifting means is mounted between two adjacent tamping tool
assemblies.
18. A movable track tamper for tamping ballast underneath a track
including rails supported on a plurality of spaced ties resting on
the ballast, said tamper comprising
1. an elongated frame;
19. The mobile track tamper of claim 18, wherein the reference
system comprises a succession of references lines overlapping each
other in the direction of elongation of the track.
20. The mobile track tamper of claim 19, wherein one of said
reference lines is associated with each of said correcting
stations.
21. The mobile track tamper of claim 19, wherein at least one of
said reference lines has an end point adjustable in relation to the
reference line which it overlaps, and an element indicating the
position of the track associated with said reference line.
22. The mobile track tamper of claim 18, wherein the reference
system comprises a reference line, the reference line cooperating
with the track position indicating element which indicates the
highest position of the track in respect to the uncorrected track
position for controlling the correction of the track.
23. A mobile track tamper for tamping ballast underneath a track
including rails supported on a plurality of spaced ties resting on
the ballast, said tamper comprising
1. an elongated frame;
2. a plurality of tamping tool assemblies mounted on the frame in
spaced relation in the direction of elongation of the track for
movement in said direction, each assembly including
a. two pairs of opposed tamping tools, said pairs of tools being so
spaced from each other in said direction 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 said
ties, the opposed tools of each pair being arranged for immersion
in the ballast adjacent one of said ties and for reciprocation in
said direction, with the one tie positioned between the opposed
tools of each pair;
3. means for controlling the movement of at least one of said
tamping tool assemblies in response to the location of the one tie
which is to be positioned between the opposed tools thereof;
4. means for correcting the position of the track,
b. the track position correcting means including a track shoe for
laterally shifting the track, the track shoe being mounted on said
frame and arranged for contact with, and to exert a downward
pressure on, the track, the track shoe being laterally movable and
arranged adjacent a tamping tool assembly for limiting any upward
movement of the track to a predetermined distance; and
5. reference system for indicating the correct track position.
24. A mobile track tamper for tamping ballast underneath a track
including rails supported on a plurality of spaced ties resting on
the ballast, said tamper comprising
1. an elongated frame;
2. a plurality of tamping tool assemblies mounted on the frame in
spaced relation in the direction of elongation of the track for
movement in said direction, each assembly including
a. two pairs of opposed tamping tools, said pairs of tools being so
spaced from each other in said direction 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 said
ties, the opposed tools of each pair being arranged for immersion
in the ballast adjacent one of said ties and for reciprocation in
said direction, with the one tie positioned between the opposed
tools of each pair;
3. means for controlling the movement of at least one of said
tamping tool assemblies in response to the location of the one tie
which is to be positioned between the opposed tools thereof;
4. means for correcting the position of the track;
5. two running gears mounting the frame for mobility on the
track;
6. means movable in relation to, but engaging, the track to hold
the track in a fixed position,
b. said track engaging means being mounted between the running
gears at a point it is desired to hold the track fixed against any
correcting movement; and
7. a reference system for indicating the correct track
position.
25. A mobile track tamper for tamping ballast underneath a track
including rails supported on a plurality of spaced ties resting on
the ballast, said tamper comprising
1. an elongated frame;
2. a plurality of tamping tool assemblies mounted on the frame in
spaced relation in the direction of elongation of the track for
movement in said direction, each assembly including
a. two pairs of opposed tamping tools, said pairs of tools being so
spaced from each other in said direction 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 said
ties, the opposed tools of each pair being arranged for immersion
in the ballast adjacent one of said ties and for reciprocation in
said direction, with the one tie positioned between the opposed
tools of each pair;
3. means for controlling the movement of at least one of said
tamping tool assemblies in response to the location of the one tie
which is to be positioned between the opposed tools thereof;
4. means for correcting the position of the track mounted at each
side of the center point of the tamper; and
5. a reference system for indicating the correct track
position,
b. the reference system including track position indicating
elements associated with each of the track position correcting
means whereby the track position may be corrected by the tamper
operating in either direction along the direction of elongation of
the track.
26. A mobile track tamper for tamping ballast underneath a track
including rails supported on a plurality of spaced ties resting on
the ballast, said tamper comprising
1. a plurality of tamping tool assemblies mounted in spaced
relation in the direction of elongation of the track for movement
in said direction in relation to the tamper whereon they are
mounted,
a. each tamping tool assembly being movable independently in said
direction for tamping a selected one of said ties;
2. means for controlling the movement of at least one of the
tamping tool assemblies in response to the location of the selected
tie;
3. means for correcting the position of the track, said track
position correcting means including
b. a plurality of means for lifting the track, each track lifting
means being mounted on the tamper forwardly of an associated one of
said tamping tool assemblies; and
4. a reference system for indicating the correct track position.
Description
BACKGROUND AND SUMMARY OF THE INVENTION
The present invention relates to mobile track tampers wherein a
plurality of "twin" tamping tool assemblies are mounted on an
elongated frame for tamping ballast underneath a track including
rails supported on a plurality of spaced ties resting on the
ballast.
"Twin" tamping tool assemblies have recently become known and are
described and claimed in out U.S. Pat. Nos. 3,372,651 and
3,357,366. Each such assembly includes two pairs of opposed tamping
tools. The 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. The
opposed tools of each pair are arranged for immersion in the
ballast adjacent one of the ties and for reciprocation in this
direction, with the one tie positioned between the opposed tools of
each pair.
Difficulties have been encountered when a plurality of tamping tool
assemblies are to be mounted on a common elongated frame in spaced
relation in the direction of elongation of the track. These
difficulties are due primarily to the fact that the track ties
frequently are not evenly spaced from each other and/or do not
extend exactly perpendicularly to the track rails. In such cases of
irregular tie position, it is important to avoid hitting the ties
with the tamping tools when the tamping tool assemblies are lowered
into the ballast for tamping. Such an impact of the tamping tools
on the ties damages the same.
Other problems arise in connection with the mounting and
positioning of track position correcting means, i.e. track lifting
and/or shifting means, on the tamper and their proper association
with suitable components of reference systems for indicating and
controlling the track position, i.e. the track grand and/or lateral
alignment. Also, a tamper frame carrying a plurality of "twin"
tamping tool assemblies must have a substantial length. When a
tamper with such a long frame is used in track curves, the tamping
tools must maintain their proper position in respect of the ties to
be tamped when the tools are immersed in the ballast.
It is the primary object of this invention to meet and overcome the
above difficulties and problems.
This and other objects are accomplished according to the invention
by mounting the tamping tool assemblies on the elongated frame for
movement in the direction of track elongation and controlling the
movement of at least one of the tamping tool assemblies in response
to the location of the one tie which is to be positioned between
the opposed tools. Means for correcting the position of the track
and a reference system for indicating the correct track position
form part of the tamper of the present invention.
The means for controlling the movement of the tamping tool
assemblies may include a tactile element in contact with the track,
preferably a selected tie, or a visible control arranged to view
the location of the one tie, such as a television screen.
BRIEF DESCRIPTION OF DRAWING
The above and other objects, advantages and features of this
invention will become more apparent from the following description
of two preferred embodiments thereof, taken in conjunction with the
accompanying drawing wherein
FIG. 1 is a schematic side view of one embodiment of a mobile
tamper according to the invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 schematically illustrates the controlled movement of one of
the tamping tool assemblies;
FIG. 4 is a side view similar to that of FIG. 1 of another
embodiment of the tamper;
FIG. 5 is a top view of FIG. 4; and
FIG. 6 is a schematic illustration similar to FIG. 3 of the
operation of the second embodiment.
DETAILED DESCRIPTION
The illustrated tampers may be used for grading and/or lining a
track and for fixing the graded track in the corrected position by
tamping. In all the figures of the drawing, the mobile tamper
comprises an elongated frame 1 which is mounted for mobility on the
track on two swivel running gears 2, 3. The tamper moves on a track
including rails 4 supported on a plurality of spaced ties 5 resting
on a ballast underneath the ties. As appears clearly in FIG. 1, the
rear running gear 2 of the tamper moves on a previously corrected
track section; the track section being corrected is fixed in
position by tamping, and a track section to be corrected extends
forwardly, as indicated by the heavy line indicating the irregular
grade of this track section.
The frame 1 has the form of a bridge extending over the track
section being tamped, and a carrier 6 for the tamping tool
assemblies 9 and 10 is supported on the frame. The operator's stand
1' is also mounted on the frame, as are the motor means 1" for
operating all moving parts of the tamper in a conventional
manner.
As more fully described and illustrated in U.S. Pat Nos. 3,372,651
and 3,357,366, the "twin" tamping tool assemblies are mounted on
the carrier for vertical movement so that the tamping tools 12 may
be immersed in the ballast so that the opposed tools of each
assembly will simultaneously tamp two adjacent ties. The tamping
tool assemblies are mounted on a support beam 11 of frame 1 for
movement in the direction of elongation of the track.
Referring now to the embodiment shown in FIGS. 1 and 2, the carrier
6 may be pivoted about a fulcrum extending perpendicularly to the
track plane and parallel thereto. This fulcrum is constituted by
pivot pin 7 connecting the carrier 6 to frame 1 above running gear
2. At the opposite end, the carrier is connected to a hydraulic
motor 8 arranged to move the carrier transversely of the track
about pin 7.
In view of the mounting of the tamping tool assemblies 9 and 10 for
movement on support beam 11 and the ability of the carrier 6 to be
swung laterally, the position of the tamping tools in respect of
the ties to be tamped is adjustable in the direction of track
elongation as well as transversely thereto. Thus, as indicated in
FIG. 3, the tamping tool position may be adjusted to the tie
position, two successive operating stages of the two tamping tool
assemblies being shown in FIG. 3. The long arrow in FIG. 3
indicates the working direction of the tamper. In the first stage,
the relative spacing of tamping tool assemblies 9 and 10 places the
opposed tools of each assembly alongside the ties 5 to be tamped.
However, as the tamper advances, the spacing of the ties changes.
If tamping tool assembly 10 were maintained in the same position as
in the first stage, its tamping tools would hit and damage the ties
5 upon immersion in the ballast, as indicated in broken lines at
the right in FIG. 3. However, if the tamping tool assembly is moved
slightly backwards, as indicated in the full-line position and by
the short arrow, the opposed tools of the assembly will be
positioned properly alongside the ties to be tamped.
In accordance with the present invention, the tamper includes a
tactile element 13 associated with tamping tool assembly 9 and in
contact with the track to prove the position of a tie 5 or another
track component. As shown by a broken line, the tactile element 13
is connected to the operator's stand 1' so that the tamping tool
assembly may be moved in the direction of elongation of the track
in response to the probing of the tactile element. Systems for
controlling the movement of tamper parts in response to the probing
of tactile elements in contact with the track are well known, as
exemplified, for instance, in our U.S. Pat. Nos. 2,976,816 and
3,127,848.
The movement of the other tamping tool assembly may then be
controlled in response to the movement of the one assembly.
However, if desired, a tactile element or other control element may
be associated with each tamping tool assembly for control of its
movement in the direction of track elongation.
While grading, i.e. lifting, of the track may be accomplished at
least partially by intensive tamping, wherein sufficient ballast is
tamped underneath the track ties to lift the track, the tamper
illustrated in the drawing, comprises a means 14 for lifting the
track, which is mounted forwardly of the foremost tamping tool
assembly in the working direction of the tamper. The illustrated
track lifting means comprises pairs of flanged rollers which
glidingly grip the track rails and which may be lifted by a
hydraulic motor, such as fully described and claimed in out U.S.
Pat. No. 3,381,615. Any other suitable track lifting means may be
used, however, including such means associated with each tamping
tool assembly. It is, of course, possible to effect lifting of the
track by vertically movable track grippers and then to grade finely
by additionally moving the track up to the desired grade by
tamping.
It is useful to limit the upward movement of the track to a
predetermined distance by mounting a track shoe 15 on frame 1. This
track shoe is arranged for contact with, and to exert a downward
pressure on, the track. The illustrated track shoe is arranged
adjacent each tamping tool assembly, i.e. therebetween, and
consists of pairs of flanged rollers engaging the track rails and
being pressed down on the rails by a hydraulic motor mounted on the
support beam 11. In this way, the distance of the track shoe from
the frame is adjustable and the distance of any upward movement of
the track is determined by the adjusted distance of the track show
from the support beam.
Track position correcting means on the tamper may also include
lateral track shifting means so that the tamper may operate not
only for grading but also for lining the track. This may be
accomplished very simply by making the track lifting means also
laterally movable. Thus, the track rail gripping rollers will move
the track laterally when they are so moved. Furthermore, the track
shoe 15 may also be laterally movable to constitute additional
lateral track shifting means, coarse lining being effected by means
14, for instance, while fine lining is effected by track shoe 15.
These track shifting positions are indicated in FIG. 2 by pairs of
double arrows.
It may be desirable to limit the extend of track movement during
grading and/or lining to a predetermined section of the track while
a previously corrected track section is held fixed against
correcting movement. For this purpose, the gripping rollers of
track shoe 15, for instance, may be used as means movable in
relation to, but engaging, the track to hold the track in a fixed
position between the running gears 2 and 3. When the hydraulic
motor presses the rollers against the track rails, the rollers will
hold the track in position against vertical and/or lateral
movement.
It will also be noted that, while the lateral track shifting means
may be individually operated, a lateral movement of the carrier 6,
on which the track engaging means are mounted, will laterally move
these means in respect of frame 1 to effect lining, as proposed in
the embodiment of FIGS. 1 and 2.
In this embodiment, the reference system includes a reference wire
16 extending from a front bogie 17 on the ungraded track section to
a rear station 18 supported on the corrected track section in the
range of the rear running gear 2 of the tamper. The height of the
wire and anchor at station 18 may be adjusted. An intermediate
bogie 19 is coupled respectively to the tamper and to the front
bogie 17 by rods 20, 21, being positioned closer to the tamping
station than the front bogie. The intermediate bogie serves to
control the position of reference line 16 if and when the front
bogie 17 happens to be located at a "false" high point, i.e. if it
rests on a track point which is lower than the track point on which
the intermediate bogie rests. In this case, the intermediate bogie
will support the reference line and will become the front station
of the reference system. The spacing between the intermediate and
front bogies 17 and 19 is preferably the same as that between the
tamping tool assemblies 9 and 10.
The reference system also includes a track position indicating
element 22 and 23 associated with each tamping tool assembly for
cooperation with the reference wire 16. Each indicating element has
a spotboard whose edge is arranged to contact the reference wire,
the spotboard being supported on the track rail and being raised
therewith.
In the embodiment of FIGS. 4 and 5, wherein like parts functioning
in a like manner have been designated by like reference numerals,
the carrier 6 has been mounted on frame 1 by means of transverse
beams 6', hydraulic motors 8' and 8" enabling the carrier to be
shifted laterally in respect of the track.
The means for controlling the movement of the tamping tool
assemblies 9, 10 includes a visible control. The illustrated
control consists of a television camera 24 associated with each
tamping tool assembly to view the ties to be positioned between the
opposed tools of the adjacent pairs of tools, and television
screens 24', 24' at the operator's stand 1' to enable the operator
to view the tie positions and to move the tamping tool assemblies
accordingly to center the assemblies properly in relation to the
ties, as illustrated in FIG. 6, which shows the particularly
usefulness of the invention with obliquely positioned ties.
The reference system illustrated in conjunction with this
embodiment is that more fully described and claimed in our U.S.
Pat. No. 3,334,593. In this reference system, two overlapping
reference lines 25 and 29 are constituted by sight lines or bundles
of radiation, such as light rays. The light beam 25 is projected
from sender 26 to receiver 27 at the rear station of the system.
The end point 26 of beam 25 is adjusted in relation to the
reference beam 29 which is a sight line extending from a sighting
instrument 31, such as a telescope, to the spotboard 30 of the
track position indicating element 23 and passing through a
transparent marker on spotboard 28 attached to sender 26. Since the
reference line 29 is very long, advance of the tamper over four
track ties will produce no substantial changes in the vertical
position of sender 26 so that accurate grading will be assured.
The tamper of this embodiment may be operated selectively in either
direction along the direction of track elongation without being
turned around, having a track position correcting means 14' mounted
on the other side of the center point of the tamper. As shown, in
fact, each essential operating component of the tamper is
duplicated on each side of the center point.
If the tamper is to be used for lining, any suitable reference
system for lining purposes may be installed. Since such systems are
well known and a showing thereof would have made the drawing too
crowded, it has been omitted.
While the invention has been described and illustrated with certain
now preferred embodiments, it will be clearly understood that many
variations and modifications may occur to those skilled in the art
without departing from the spirit and scope thereof.
* * * * *