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NOV- 19, 1945-
2,41 1,408
Filed July 5, 1943
2 Sheets-Sheet 1
Nov. 19, 1946.
2,41 1,408
Filed July 5, 1943
2 Sheets-S?eet 2
Patented Nov. 19, 1946
} 2,411,408
Stewart F. Armington, Willoughby, Ohio, assignor
to The Euclid Road Machinery 00., Euclid,
Ohio, a corporation of Ohio
ApplicationJuly 5, 1943, Serial No. 493,555 .
5 Claims.
This invention relates to improvements in a
frame for a crawler track.
Among the objects of the present invention are
the provision of a frame of very strong construc
tion for an endless track adapted to carry very
heavy loads and means for keeping the track
comparatively clean. The details of a preferred
form for carrying out these purposes is shown
in the accompanying drawings and the essential
features thereof will be summarized in the ap
pended claims.
(Cl. 305-4)
sided construction when viewed in section, as
shown in
2. This box ‘beam comprises side
walls [6a, a bottom I62), and a top ‘wall I60
which is Of generally inverted V shapes The
lower runs of the guide rails Ilia and 10b are
welded directly to the beam walls l'o‘a. As clear
ly shown in Fig. 2, these walls extend below the
guide rail or track providing the ?anges Hid
which aid in holding the rollers in position on
the track. Along the outer walls of this lower
run of the track are other ?anges I‘! which per
In the drawings Fig. 1 is a side elevational view
form a, similar function on the outside of the
of a track embodying. my device, with a portion
track. The curved ends of the tracks or guide
of the frame‘ broken away to more clearly indi
rails, as to their upper half portions, are mount
cate the construction; .Fig. 2 is an enlarged 15 ed on the frame by means of plates I8 of quarter
transverse sectional View taken along the line
elliptical form. These plates are welded to the
2——2 of‘ Fig. 1;. while Fig.5 3 is an enlarged frag
beam iii in alinement with the sides Hia, as best
mental view taken in- approximately theposition
seen in Fig. 2. The plates l8 extend above the
indicated by line 3-3 of Fig. 1.
upper reaches of the guide rails Hm and I 0b,
The track here disclosed is of the type de 20 providing ?anges l3a, which aid in. holding the
scribed and claimed in‘ Letters Patent Re. 21,953,
rollers on the track as they round the ends. Out
granted November ‘18, 1941, to Harry Law, but it
side ?anges l9 are provided similar to the ?anges
will be understood that certain features ‘of my
I‘! already described. The plates l3 are further
invention are applicable to other types ‘of track.
strengthened by tie plates 20 which extend trans
In Fig. 1 I have indicated an endless guide rail 25 versely of the frame near the inner ends of plates
or track In extending in ageneralily elliptical
it. These tie plates are welded to the plates I8
form in a fore-and-aft direction and providing
and also to the top wall ltc of the beam l6.
means by which a Vehicle travels on rollers II,
Strengthening means is provided for the upper
which in turn are rotatably mounted in shoes I 2
rails Illa and lilb intermediate the ends of the
which are fastened together by link pins l3 to 30 frame. As best seen in the various views, this
provide an endlesstrack. In- this special‘ form
comprises a web 2| extending downwardly be
of track the link pins travel along a path com
lneath each guide rail at right angles‘ thereto and
prising the straight top and bottom portions A
connected therewith by welding. The ends ofv
and B which are tangent to‘ the perfect semi
these web members are bent over as most clearly.
circle.‘ end portions C and D asytaught in the
shown at 25a in» Fig. 3 and welded to plates I 8
aforesaid Law patent. ‘In the present‘form of
atitlie points; 12th."
. I _ '
my device, as clearly appears in Fig. 2, the guide
‘ Further means for strengthening the frame and
rail or track I0 is composed of two parallel por
for keepingv the track clean is providedby means
tions Illa and I 01), and certain advantages are
of the skirt plates‘ 22‘, one at each side of the
derived from this arrangement, as will presently 40 beam i6 and running for.‘ the full length of the
frame. As best seen in Fig. 1, the ends of these
Each shoe l2 comprises a base portion In and
plates are cut at‘ 22a toilfollow the curve of the
parallel upstanding side portions [2b. At some
trackal-?. These skirt plates- are welded at the
point in the side portions intermediate the link
top to the side Walls [15a of the beam l6 and at
pins l3 (in the present form midway between 45 the bottom are welded to the ?anges H, which
the pins) the side portions are apertured to re
in turn are welded to the lower portions of the
ceive support means for a shaft M which car
guide rails lBa and Nib. It is thus apparent that
ries a pair of rollers 15a and l5b. It will be
the skirt plates aid in providing a very strong
understood therefore that the rollers are rotat
support for the lower portions of the guide rails
ably mounted in the shoe; These rollers are 50 Mia and H31). At the same time these guide rails
spaced apart so that they are in alinement with
and skirt plates together with the beam portions
the guide rails [0a and “lb.
lBa provide triangular hollow beams parallel to
The frame is rendered extremely strong by a
the main beam I6 and reinforcing the same.
large box beam I6 whichlextends from end to
Further sti?ening means is provided along the
end of the track l0 and which is of irregular ?ve 55 lower portion of the track by cross tie members
‘ 23, three of these being shown in Fig. 1.
frame, and wherein said track comprises a plural
ity of shoes linked together, each shoe carrying
are welded to the bottom plate I61) and to the
side beam portions l6a. It will be noted in Fig. 1
that the plate l?b has its ends carried up and
cut so as to completely closes the opposite ends
of beam [6. This makes a very strong construc
a pair of associated rollers located between the
shoe and said frame and said rollers being spaced
apart transversely of said frame, the combina
tion of said frame having endless parallel guide
rails engaging said rollers throughout their path
of travel, said guide rails having upper-‘and lower
tion and keeps dirt from entering the beam.
Means is provided for mounting a vehicle on
the crawler track assembly here disclosed. In the
present form a bearing sleeve 24 is mounted inter»
mediate the ends of the frame and extending
transversely of the track. This sleeve is a tubu
lar member extending through a corresponding
hole in the beam I 6 and the beam and sleeve are
runs, said frame having a dirt shed of inverted
..V. section extending lengthwise of said frame be
low said upper run and between the parallel guide
rails thereof, and a plate welded to each side of
said dirt shed extending downwardly and out
wardly therefrom, and each of said plates near
(welded together at their various points of con 15 its lower end being welded to the outer edge of
one of said guide rails along said lower run.
tact. Additional support is provided by the braces
3. In a crawler device having an elongated
25 which extend from the ends of the sleeve up
frame, having an endless crawler track on said
wardly and outwardly to the web plates 2| where
frame, and wherein said track comprises a plu
the braces are welded.
It will be apparent from the above description 2O. rality of shoes linked together, each shoe carry
ing a pair of associated rollers located between
that I have provided a very strong frame and one
the shoe and said frame and said rollers being
which will keep the track continuously cleaned
spaced apart transversely of said frame‘, the coin
bination of said frame having endless parallel
guide rails engaging said rollers throughout‘their
as the Vehicle moves over loose dirt or other simi
lar material. Thespaced parallel upper reaches
of the track lEi permit dirt to fall away from the
path of travel, said guide'rails having upper and
shoe l2 as they traverse the idle or return stretch
lower runs, said frame having substantially par,
of the track. The mid portion of the upper reach
allel and substantially vertical plates extending
of the track or guide rail is free of obstruction
from end to end thereof, each plate respectively
in the central portion of the frame, in other
words, between the limits of the end ?anges l8a 30 welded near its lower end to the innertedge of
one of said guide rails along its lower ‘run, a top
and 19, asrclearly shown in Fig. 1. As the rollers
cover of inverted V section connecting the upper
I I ride along this portion of the track dirt is free
edges of said vertical plates, and support‘r‘ne‘ans
to fall downwardly and hits the shed portion :50
for the upper run of said guide rail weldedto-said
of the main beam. As the dirt continues down
frame and extending above said’top; cover; _
wardly along the sloping sides of this beam it falls
off on the skirt plates 22 and is directed'further
downwardly and outwardly to the ground. It will
be noted that the skirt plates 22 extend beyond.
the parallel side portions~ [2b of the track shoes
and are approximately as low as the top of these 40
side portions s'o thatdirt is prevented from drop
4. Track construction comprising an endless
crawler track, an endless guide‘rail ofgenerally
elliptical form engaging said. track to j'yguideiiit‘,
a box beam ‘extending generally ‘horizontally
through the central portion of said elliptical vform
and» rigidly connected‘ between the‘ggopp‘osité
sharp turns during the usual operation of the ve 45
hicle. vThis is an important feature with this
rounded ends'of said guide rail, said‘v box" beam
having generally vertical side walls, and said
guide rails lying wholly laterally ‘outside of said
Walls extended, whereby said box beam extends
into immediate supporting position adjacent said
type of track, which is adaptedrto carry heavy
rounded ends of said guide rail;
ping into the shoes and dirt and rocks are pre
vented from being forced into the shoes from the
‘ sides as the crawler track is twisted in making
loads at speeds which are greater than‘those cus
tomarily met with.
What I claim is:
1. Track construction comprising a frame, an
endless ‘crawler'track on said frame, said frame
comprising parallel guide‘ rails for said track
Where‘ it engages the ground, said frame having
a dirt shed ‘of inverted V section extending
lengthwise of said frame, and a plate on each side
of said dirt shed extending downwardly andout
i '
' r
5. Track construction comprising an ‘endless
crawler track, an endless guide rail of generally
50 elliptical form engaging said ‘track to guide it, ‘a
extending generally , horizontally
through the central portionof said‘elliptical form
and rigidly connected with opposite ends of's'aid
guide rail, said box ‘beam having generally‘ vertii
cal’side'walls, bottom ‘runs of said guide rails ex-'‘
skirtrplates extending inwardly ‘and-upwardly
tending laterally outwardly ‘from s‘aid'sideiwalls,
nected with said dirt shed and each of said plates
at its lower end supporting one of said parallel
from the outer edges of said guide rail runs to said
side walls, and said skirt plates, guide railsan'd
side walls being rigidly joined together to ‘form
a hollow plate construction triangular in section.
wardly therefrom, said plates being rigidly con
-2. .In a crawler device having an elongated
frame, having an endless crawler track on said
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