U.S. patent number 3,584,583 [Application Number 04/778,472] was granted by the patent office on 1971-06-15 for monorail train.
This patent grant is currently assigned to Becorit (G.B.) Limited. Invention is credited to Dennis Charles Cartwright.
United States Patent |
3,584,583 |
Cartwright |
June 15, 1971 |
MONORAIL TRAIN
Abstract
This invention relates to a locomotive adapted to run on a
ground mounted monorail track composed of rail elements of channel
shape in cross section arranged with the mouths of the channels
presented inwardly, the locomotive being supported upon bogies at
opposite ends, at least one of which includes a pair of large
diameter driving wheels engaging the upwardly presented faces of
the horizontal flanges of the rail elements, two pairs of
counterpressure wheels situated fore-and-aft of the driving wheels,
and of a diameter to be contained within the channels presented by
the rail elements of the track, and a beam element on which the
counterpressure wheels are carried, and which is suspended by
contractable hydraulic rams from a mounting member for the driving
wheel, the beam element carrying guide or stabilizing wheels at
opposite ends of a diameter slightly less than the horizontal
distance between the inwardly presented faces of the vertical webs
of the rail elements, and adapted to engage respectively with
opposed faces of these webs.
Inventors: |
Cartwright; Dennis Charles
(Nottingham, EN) |
Assignee: |
Becorit (G.B.) Limited
(Nottingham, EN)
|
Family
ID: |
10467975 |
Appl.
No.: |
04/778,472 |
Filed: |
November 25, 1968 |
Foreign Application Priority Data
|
|
|
|
|
Nov 24, 1967 [GB] |
|
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53480/67 |
|
Current U.S.
Class: |
105/94; 104/119;
104/244; 104/246; 105/30; 105/141; 105/144; 105/215.1 |
Current CPC
Class: |
B61B
13/04 (20130101) |
Current International
Class: |
B61B
13/04 (20060101); B61b 013/04 (); B61c 013/00 ();
B61f 003/12 () |
Field of
Search: |
;104/94,95,118,119,120,121,242,243,244,245,246
;105/30,141,144,145,148,149,150,153,154,155,215,3,4 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: La Point; Arthur L.
Assistant Examiner: Beltran; Howard
Claims
I claim:
1. A locomotive for use in a monorail conveyor of the kind
specified, comprising a body on which is mounted a prime mover, and
which is supported by longitudinally spaced bogies, one at least of
which is a driving bogie, to enable said locomotive to travel along
a ground mounted monorail trackway, incorporating at least one
generally horizontal flange, and at least one generally vertical
web, the improvement wherein the driving bogie comprises:
a. a bogie body structure pivotally connected to said locomotive
body about an upright swiveling axis, and including:
i. a mounting member and
ii. a counterpressure wheel support
b. a central group of bogie wheels mounted on said bogie body
structure for engaging said flange of said trackway over upwardly
and downwardly presented faces thereof, and including:
i. at least one driving wheel operatively connected with said prime
mover and driven therefrom and mounted on the mounting member for
engaging one of said flange faces; and
ii. at least one counterpressure wheel mounted on said
counterpressure wheel support for engaging the opposed one of said
flange faces;
c. means interconnecting the mounting member and the
counterpressure wheel support and including:
i. preload means for acting upon the mounting member and the
counterpressure wheel support for urging said driving wheel and
said counterpressure wheel into engagement under pressure with said
flange;
ii. pivot means for accommodating angular movement of the
counterpressure wheel support relative to the preload means about a
horizontal axis;
iii. guide means for constraining the counterpressure wheel support
against movement longitudinally of the bogie relative to the
mounting member, and for accommodating relative movement of the
mounting member and counterpressure wheel support upwardly and
downwardly;
d. stabilizing wheels on said bogie body structure at opposite ends
of said central group of bogie wheels for engaging opposed
laterally presented faces of said trackway, and afforded by said
web thereof.
2. A locomotive according to claim 1 wherein:
a. said driving wheel is mounted for rotation on said mounting
member about a single axis situated above said flange;
b. said counterpressure wheels are mounted for rotation on said
counterpressure wheel support about respective axes disposed
beneath said flange and offset longitudinally from said driving
wheel axis to lie forwardly and rearwardly respectively of the
latter;
c. said stabilizing wheels are mounted on said bogie body structure
at a position beneath said flange to engage with respective opposed
faces of said web which extend downwardly from said flange.
3. A locomotive according to claim 2 wherein:
a. said mounting member is disposed above said flange;
b. said counterpressure wheel support is in the form of a beam
element extending longitudinally of said trackway below the level
of said flange, and having bearing means for rotatably mounted said
longitudinally spaced counterpressure wheels for rotation about
their axes respectively;
c. said preload means comprises suspension elements extending
upwardly from said beam element adjacent to opposite ends thereof,
one before and one behind said driving wheel axis and connected
adjacent to their upper ends to said mounting member;
d. at least one of said suspension elements comprises components
movable between an extended position and a contracted position to
drawn said beam element upwardly in the latter of said positions,
and establish the requisite contact pressure between said bogie
wheels of said central group, and said upwardly and downwardly
presented faces of said flange.
4. A locomotive according to claim 2 wherein:
a. said driving wheel has a diameter larger than the diameter of
said counterpressure wheels;
b. said counterpressure wheels have diameters less than the
vertical dimension of said web of said trackway.
5. A locomotive according to claim 2 wherein:
a. said driving wheel or each of same is provided with a tire 08
resilient material providing a zone of contract with the upwardly
presented face of said flange extending longitudinally thereof;
b. said axes of rotation of said counterpressure wheels are spaced
apart from each other by a distance only slightly greater than the
length of said zone of contact;
c. said counterpressure wheels are formed of relatively rigid
material, and have zones of contact with the downwardly presented
face of said flange lying at opposite ends of, but close to, the
ends of said first zone of contact of said driving wheel or wheels
with said flange.
6. A locomotive according to claim 1 wherein:
a. said counterpressure wheel support comprises a beam element
disposed beneath said flange and extending longitudinally of said
trackway;
b. said guide means comprises respective cooperative guide elements
on the mounting member and on the beam element engaging with each
other to provide for upward and downward movement of said beam
element relatively to said mounting member, and constraint to
longitudinal movement of said beam element relatively to said
mounting member.
7. A locomotive according to claim 6 wherein:
a. said guide elements on said mounting member comprise downwardly
projecting arms at opposite ends of said mounting member extending
vertically to a position beneath said flange of said trackway;
b. said guide elements on said beam element comprise guide faces
thereon presented in opposite longitudinal directions for
engagement with respective ones of said arms.
8. A locomotive according to claim 1 for use with a trackway
including laterally spaced rail elements each having a vertical
web, and a laterally inwardly extending horizontal or approximately
horizontal flange at the upper end of said web, wherein:
a. each driving bogie of said locomotive incorporates two laterally
spaced coaxial driving wheels for engagement with the upwardly
presented faces of respective flanges of said rail elements
b. said prime mover is operatively connected with said driving
wheels by transmission means on said bogie body structure disposed
laterally outwardly of said driving wheels respectively;
c. said counterpressure wheels include pairs thereof disposed
respectively forwardly and rearwardly of said driving wheels;
d. the mounting member is disposed above said rail elements, and
includes bearing means for rotatably mounting said driving
wheels;
e. said counterpressure wheel support includes a beam element
extending longitudinally of said trackway between said laterally
spaced rail elements thereof, and beneath the flanges of said rail
elements, and includes bearing means for rotatably mounting said
counterpressure wheels;
f. said preload means comprises suspension elements extending
upwardly between said rail elements and connecting said beam
element with said mounting member adjacent to opposite ends of the
latter, at least one of said suspension elements being
contractable;
g. said stabilizing wheels are mounted in bearing means provided
adjacent to opposite ends of said beam element for engagement with
respective inwardly presented faces of said webs of said rail
elements.
9. A locomotive according to claim 1 wherein each of said bogies
comprises a bogie body structure, including means for effecting
pivotal connection between said locomotive and a carriage to be
drawn thereby about an upright axis, and for providing swiveling
movement of said bogie relative to said body of said locomotive
about said upright axis.
10. A locomotive according to claim 10 wherein said bogie body
structure includes an upwardly projecting post for extension
through bearing means provided both on said body of said locomotive
and on a carriage to be drawn thereby, said bogie this providing
support to both said locomotive and to said carriage at the end of
said locomotive and said carriage at which said bogie is situated.
Description
BACKGROUND OF THE INVENTION
Field of the Invention
This invention relates to conveyors of the kind comprising a ground
mounted monorail trackway, and a carriage or carriages movable
therealong, and positively retained against lateral angular tilting
relative to the trackway by virtue of the wheels being so arranged
as to define collectively a passageway extending longitudinally of
the carriage of a cross-sectional shape to receive at least a
portion of the cross section of the trackway, such cross-sectional
shape intrinsically preventing angular tilt of the carriage
relatively to the trackway about a reference axis extending
longitudinally of the latter. Such conveyors are hereinafter
referred to as monorail conveyors of the kind specified.
In a typical form of trackway, the latter comprises a pair of
laterally spaced rail elements, the lateral spacing of which is too
small to provide the requisite stability against lateral tilt of
the carriage were the latter to be provided only with wheels
running on the upwardly presented faces of the rail elements and
freely separable from such faces. Such lateral tilt is, therefore,
prevented by provision on the carriage of a wheel or wheels adapted
to engage one or more of the following faces presented by the
trackway, namely laterally inwardly presented faces of the rail
elements, and downwardly presented faces afforded by horizontal
flanges at the upper edges of the rail elements.
The invention has been developed primarily for monorail conveyors
of the kind specified intended for use in underground mine
workings. In this application the tunnels or roads along which the
conveyor is required to operate frequently presents steep upward
and downward inclinations. If the carriage of the conveyor are
required to be propelled by a coupling to a self-propelled
locomotive, as distinct from being propelled by connection to a
haulage cable extending alongside the monorail trackway, difficulty
is experienced in establishing the requisite driving grip between
the wheels of the locomotive and the trackway. Such grip cannot
effectively be increased by increasing the weight of the
locomotive, since this would require the trackway to be formed to a
heavier section, or would require the trackway to be supported from
the ground by foot or spacer members situated closer to each other
than is necessary in the case of cable hauled carriages, and both
these factors would materially increase the cost of the
installation. Further, it is desirable that a design of trackway
common to both a cable hauled system and a locomotive propelled
system shall be capable of being utilized.
SUMMARY OF THE INVENTION
According to the invention there is provided a locomotive for a
monorail conveyor of the kind specified, comprising a body on which
is mounted a prime mover, and which is supported by longitudinally
spaced bogies, one at least of which is a driving bogie, to enable
said locomotive to travel along a ground mounted monorail trackway,
incorporating at least one generally horizontal flange, and at
least one generally vertical web, and which includes the
improvement wherein the driving bogie or each of same comprises a
bogie body structure pivotally connected to said locomotive body
about an upright swiveling axis, a central group of bogie wheels
mounted on said bogie body structure for engaging said flange of
said trackway over upwardly and downwardly presented faces thereof,
and including at least one driving wheel operatively connected with
said prime mover and driven therefrom for engaging one of said
flange faces, at least one counterpressure wheel for engaging the
opposed one of said flange faces, preload means for urging said
driving wheel or each of same on the one hand, and said
counterpressure wheel or each of same on the other hand into
engagement under pressure with said flange, stabilizing wheels on
said bogie body structure at opposite ends of said central group of
bogie wheels for engaging opposed laterally presented faces of said
trackway, and afforded by said web or webs thereof.
The invention will now be described by way of example with
reference to the accompanying drawings, wherein:
FIG. 1 is a diagrammatic view in side elevation illustrating a
monorail conveyor of the kind specified in accordance with one
embodiment of the present invention;
FIG. 2 is a view in side elevation and in vertical cross section on
the line 2-2 of FIG. 3 showing one embodiment of driving bogie in
accordance with the invention for incorporation in a locomotive of
the monorail conveyor shown in FIG. 1;
FIG. 3 is a view in end elevation of the driving bogie of FIG. 2;
and
FIG. 4 is a plan view of the bogie of FIG. 2 partly in cross
section on the line 4-4 of FIG. 2.
Referring firstly to FIG. 1, the monorail conveyor shown comprises
two vehicles, of which 1 is the locomotive, and 2 is a load
carrying vehicle. This may be a passenger vehicle, as shown, or
adapted for carrying material or articles.
The trackway 3 comprises a plurality of track sections articulately
connected together by coupling means at positions 4.
In the coupled train of vehicles seen in FIG. 1, successive
vehicles are articulately coupled for swiveling about a vertical
axis, and sufficient freedom of movement is provided to allow
relative articulation between the vehicles about a transverse
horizontal axis.
The locomotive comprises a body including a longitudinally
extending base member 5 which is cranked upwardly at its ends, as
indicated at 6, one end being bifurcated to receive the
corresponding single leaf end of the next vehicle between the limbs
of the bifurcated portion, and this limb and the bifurcated portion
being apertured to permit of upward projection therethrough of one
component of a swivel bearing on bogies 7 which collectively
support the vehicles of the coupled train.
The locomotive 1 carries a prime mover 8 which may be in the form
of an internal combustion engine, such as a diesel engine, having a
fuel tank 8a, and driving a variable output hydraulic pump 9.
The locomotive may be equipped with a drivers seat 1a and a control
console 1b.
Referring in more detail to the trackway, this comprises two
laterally spaced rail elements 10, each of channel section, and
having vertical webs 11, and upper and lower horizontal flanges 12
and 13.
The two rail elements 10 are connected to each other by foot
elements, 10bwhich serve to maintain the requisite lateral spacing
between the rail elements, and also space the latter a certain
distance above the floor of the ground where the trackway is
mounted, for example the floor of a road or tunnel in a mine
working. Typically the lateral spacing between the rail elements
would be such that their outwardly presented lateral faces are 77/8
inches apart, the height of the upwardly presented face of the
upper flanges 12 being typically about 9 inches above the level of
the floor.
As mentioned, the trackway is composed of structurally separate
rail sections arranged end-to-end, and adjacent to the end of each
such track section coupling means are provided for connecting same
together in end-to-end relation. Conveniently one coupling element
may be formed on the foot element, and may be in the form of an
upwardly presented cradle of parts cylindrical form, as indicated
at 10b, extending transversely of the rail section, with the cradle
portion offset longitudinally from the end of the track section
concerned, and disposed just beneath the lower flanges 13.
The complementary coupling element of the coupling means comprises
a cylindrical member welded or otherwise secured to the lower
flanges 13, and extending transversely of the track section at the
opposite end thereof, as indicated at 10c.
The locomotive 1 may be supported at each end by driving bogies 7,
or one only of these bogies may be a driving bogie, and the other
may be an idle bogie, in which case it may be a simplified form as
hereinafter mentioned.
Referring now specifically to such driving bogie, the driving
wheels thereof 14 are journaled for rotation about a horizontal
transverse axis 15 by a bearing provided in a mounting member 16 of
generally blocklike form disposed predominately above the trackway.
The driving wheels together with tires, preferably formed of
`duthane` rubber, have diameters typically of 8 to 12 inches.
The mounting member is provided with an upwardly projecting post
16a forming a component of a swivel bearing and serving also to
couple successive vehicles such as 1 and 2.
The driving wheels 14 contact the upwardly presented faces of the
upper flanges 12 of the trackway.
The underfaces of these flanges are engaged by counterpressure
wheels 17 of which there are two associated with each driving wheel
14, these being journaled for rotation about axes 18 extending
horizontally and transversely of the trackway at positions offset,
one on each side of a vertical plane passing through the axis
15.
The counterpressure wheels 17 are of a diameter somewhat less than
the vertical internal dimension of each channel section rail
element so as to provide a clearance space 19, preferably having
only a small value, with respect to the bottom flange 13. Typically
the counterpressure wheels have diameters of 2 to 3 inches. It is
advantageous to employ counterpressure wheels having the largest
diameter capable of accommodation within the vertical internal
dimension of the rail element to provide more favorable compressive
loading of the flanges 12 at the zones of contact with these
wheels.
All four counterpressure wheels are mounted on a counterpressure
wheel support in the form of a longitudinally extending beam
element 20 provided with suitable bearings for the mounting of the
counterpressure wheels and supported by suspension elements in the
form of hydraulic piston and cylinder units 21 extending upwardly
from the beam to which their lower ends are pivoted, and supported
at their upper ends by pivotal connection to lugs 22 projecting
longitudinally at each end of the mounting member 16.
If, as shown, the upper faces and underfaces of the flanges 12 are
horizontal, the driving wheels and counterpressure wheels will be
mounted in pairs in which the wheels are exactly coaxial with each
other; but if these faces re not exactly horizontal, then there
would be some departure from exact coaxial relation between the
driving wheel pairs and/or the counterpressure wheel pairs.
The mounting member 16 also has downwardly projecting arms 23 with
penetrate the beam element, the latter being apertured for this
purpose, and engage guide faces 24 formed on the beam element and
presented in opposite longitudinal directions.
This arrangement provides ability for the beam element to rise and
fall relatively to the mounting member 16 and also undergo some
angular movement about an axis 25 on the same horizontal level as
the axis 18 and in vertical alignment with the axis 15 by virtue of
the convexity of the guide faces 24. However, the beam element is
constrained against translatory endwise movement by engagement of
the arms 23 with the guide faces 24.
The driving wheels 14 are coupled to respective hydraulic motors
supplied with fluid from the pump 9 disposed at the outer sides of
the driving wheels and conveniently supported in any suitable
manner from the mounting member 16. The pump and hydraulic motors
effectively form a transmission means of variable velocity ratio
dependent upon the delivery rate setting for the pump.
The driving wheels and counterpressure wheels form a central group
of compact dimensions longitudinally of the trackway, and hence
able to negotiate abrupt changes of inclination and lateral
direction at junctions between straight rail sections. Further, the
rubber tires of the driving wheels provides a longitudinal spread
of downward load on the flanges 12 of the rail sections which
approximates to the longitudinal spacing of the axes 18, and hence
the zones of contact between the rigid metal counterpressure wheels
17 and the flanges 12.
At opposite ends the beam element 20 is provided with extensions 26
having vertical bearings 27 for stabilizing wheels 28. These wheels
perform a guiding function with respect to the angular position of
each bogie about its vertical swivel bearing: one of the
stabilizing wheels contacts the inwardly presented face of the
vertical web 11 of one rail element and the other contacts the
equivalent inwardly presented face of the vertical web 11 of the
other rail element. The diameter of each stabilizing wheel 28 is,
of course, somewhat less than the lateral separation between the
inwardly presented faces of the webs 11.
The arrangement described provides a relatively short bogie capable
of negotiating trackway curvatures down to about 13 ft. radius.
Further, the arrangement has flexibility in that either one or two
such bogies may be provided on the locomotive. The preload exerted
by the hydraulic rams 21 which urge the counterpressure wheels 17
upwardly into contact with the underface of the upper flange 12 of
each rail section does not significantly increase the stress
conditions existing in the lower flange 13, this being the limiting
factor as regards the weight of the locomotive which can be
supported by trackway.
The hydraulic fluid necessary to pressurize the hydraulic rams 21
may be derived from the hydraulic pump 9 driven by the prime mover.
Alternatively, a manually operated pump, for example in the form of
a piston and cylinder assembly operable through a screw mechanism,
may be sufficient to provide the requisite pressure of hydraulic
fluid to establish the required preload.
If only one driving bogie is required to be provided on the
locomotive, the other bogie may be of simplified form, such as that
seen at 7a at the extreme right-hand end of the vehicle 2.
Further, although as depicted in the drawings, the body of the
locomotive is of rigid form longitudinally, it would be possible
for the locomotive to have an articulated body supported at its
midposition by a bogie which may be the driving bogie or one of
same. In this case, one body section of the locomotive may carry
the prime mover, and the parts 8, 8a and 9 already mentioned, and
the other section of the locomotive body may incorporate the
driving station and be equipped with a seat, such as 1a, and
control console, such as 1b.
It will be understood that it would be within the scope of the
invention for the two driving wheels which are mounted for rotation
about a common axis to be replaced by a single driving wheel of a
width to span both rail elements. Similarly, single counterpressure
wheels mounted each on its own axle may be employed instead of
coaxial pairs.
Further, instead of using two pairs of counterpressure wheels, or
two counterpressure wheels rotatable about axes spaced apart
longitudinally and situated fore-and-aft of the driving wheel, a
single counterpressure wheel, or a single pair of coaxially mounted
wheels may be employed in certain circumstances, for example there
the depth of the rail section permits of the accommodation of a
counterpressure wheel of greater diameter than those previously
referred to. The axis of such counterpressure wheel or wheels would
be substantially in the same vertical plane as that of the driving
wheel or wheels.
Moreover, it would also be within the scope of the invention to
employ two pairs of driving wheels, or two driving wheels of a
width to span both rail sections, mounted for rotation about
respective axes which are spaced apart longitudinally from each
other. In this arrangement, there would be either a single
counterpressure wheel, or a single pair of coaxially mounted
counterpressure wheels in association with each of the driving
wheels, or pairs thereof, as above-described, or each driving
wheel, or each pair of driving wheels, may have associated with it
two pairs of longitudinally spaced counterpressure wheels situated
fore-and-aft of the axis of rotation of the driving wheel, or
driving wheel pair concerned. One of such pairs of counterpressure
wheels may be common to the two driving wheels or pairs thereof,
namely that situated at an intermediate longitudinal position
relative to these driving wheels.
* * * * *