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Патент USA US2109177

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Feb. 22, 1938.
W. w. MacDoNALD
Filed NOV. 2, 1935
2 Sheets-Sheet 1
Peten-ted Feb. 22, 193s -f l
UNITED STATES lPii'rlezN'r orales
wiuiam w. Maenonald, Mountain view. oeuf.,
ëssliigtfnor to Max L. Raseni'eld, San Francisco,
Applicatie» November-‘2, l1935, serial No. 47.931
4 claims. (ci. aso-_1065)
This invention relates to low bed heavy duty wheels is obtained by means of a pair of spaced
Two ofthe essentials of a truck de- ~ parallel load rails I and 2, extendingthe full
signed for heavy duty are (a) that the loading
length of the loading platform, -and intercon
platform be kept as low as'possible without di-
nected by means of a pair of spaced cross rails
5 -minishing the required road clearance, and (b)
8 and 4, and by a rear end rail 5 defining the 5
that substantially the maximum overall width of width of ' the loading platform. Welded to the
a Vehicle permitted by state laws be made avail- inner corners of _the rectangle'formed by the rails
able for loading purposes without resorting to I, 2,'3 and 4 are spring carriers 6 which also serve
loading platforms having two or more levels. to make the frame„more rigid. Welded to the
l0 These conditions should of course be met without cross rail 3 at spaced points substantially in line 10
decreasing the requisite strength of the chassis with the inner faces of the spring carriers 6, are
or frame, and in_ this -connection it- should be a pair of main rails 1 and,8'extending forward
borne in mind that heavy duty trucks are as_a beyond the front end of the load rails I and 2, in
rule not provided with bodies, and consequently _ parallelism therewith to form _the vneck of the
l5 the frame must of itself be Ísuil‘lciently rigid toV frame and to support the engine. It will there- 15
withstand distortion.
fore be seen that the main rails 'I and 8 together
One of the objects of this invention is the pro- with the load rails I and 2 and the cross rail 8,
Vision of Aa rigid, low-bed heavy-duty truck may be considered as >forming interior offsets
within which thesprings 9 are _adapted to lie'.
"Another, object of the invention is the provision of a simplified jack shaft and spindle assembly by means of which the bed' of a vehicle may
The springs 9 may also be- considered as lying 20
within the load' rails I and 2, and-the rearward
continuation of lines defined by the main rails
bemaintained close to the ground.
‘l and 8. Extending between the main-rails 'I and
Still another object of the invention is the pro- 8 in line with the forward ends of the load rails
vision of va spring carrier assembly which permits y I and 2 is a forward end rail I'I, and extending 25,.
flexibility of movement of the vehicle springs, loutwardly from the main rails 1 vand 8 in line
and enables the bed'of the vehicle to be main- vwith the forward end rail I Il are rails _I2 and I8
tained close to the ground.
welded to the load rails I and 2. Extending out-`
_ Another object of the invention is the provision
wardly from the load rails I and 2-from points
substantially in line `with the spring carriers 6, 30.
30 of a new and novel oil seal between the wheel
hub and its associated oil hood.
The invention possesses other advantageous
features, some of which with the foregoing, will
be set forth at length in the following description
5 where that form of the invention which has been
selected for illustration in the Ydrawings accom-
panying and forming a part of the present speciñcation is outlinei-lv in full. In said draw/ings,- one
form of the invention -is shown, but it is to be
[10 understood that it is not limited to such form,
are a pair of cross rails I_5 and I6 which define
with the load rails I and 2, rectangular recesses
for- accommodating the rear wheels of -the vehi
cle. Extending between the outer ends of the
rails I3 and I5 and/ welded thereto are side 35. I
rails I1.
Extending b'etween the load rail 2 and the side
rail I'l are a number of spaced stiil‘ening cross
rails I8, I8 and- 2l. 'A cross rail 22 in line _with
the cross rail I 8, extends between the load rail 2 40‘
since the invention as set forthin the claims may _ and the main rail 8 and a cross rail 23 in line with
be embodied in a pluralityrof forms.
the rails I8 'and' 22, iëxtend’s between the main
Referring to the drawings:
_ rails 1 and 8. In the same manner a cross rail 24
_, Figure 1 is a plan view of the frame of a-heavy in line with the cross rail 2|, extends between the Y
45 duty' truck with part of the loading platform
broken away to more clearly disclose the object
of my invention.
the main rails ,1 and 8.
Figure 2 is a side elevation of the frame illustrated in Figure 1.
_- »
_ Figure 3 is a vertical section taken on'th'e line
3-3 of Figure 1. '
Extending between `the
cross rail 4 and the rear end rail 5 intermediate
their ends, is a central rail 26.
Extending be
tween the cross rails 3 and4 are a pair of vspaced 50
angle iron ñoor rails 21 and 28. -All of the rails
Figure 4 is a section taken on- the line 4_-4 of
Figure 3.
load rail 2 and the main rail 8 and across rail 25 45
in line with the rails 2| and 24 extends between
.AsI illustrated in Figure 1 a single deck loading
55 plat‘orm of maximum width between the rear>
above referred te with- the exception of rails 2l
and 28 .are formed'of channels, and all joints are
made by welding.
4 `
Since the frame is symmetrical with respect to 55
its'center line it is felt that the above description ` the opposed lateral walls of the spring carrier
of the lower half of Figure 1 sumciently illus " 1I by means of bolts 1I.-passing through lugs- 14
is a cup shaped spring retainer 1i. 'I'he base of
trates the construction involved without the lgie
cessity of _ detailing the upper half.
' the spring retainer is provided with a setfscrew
Centrally located within the rectangle formed , 14 by means of which the vertical position of a
' by the'raìls I, 2, 3 and 4 is-an axle housing 3l
[to the outer ends of which are secured the -leaf
rubber 'cushion _11 may be adjusted as desired to .
regulate the elevation of a ball bearing 18, seated
on‘the cushion 11. 'I‘he upper and lower ends
of the cushion 11 are'provided with metallic
"springs s. by means of the usual u-bolts :2. The
lower edges of the load rails I and 2 are notched
as at. Il to receive the rear wheel spindles of tl‘e
washers 19 to prevent direct contact of the ball 10
bearing 10> with the rubber cushion 11. Extend
vehicle„ _and to compensate for- this weakening
they are reinforced' by stiffening plates 34.
ing`> through the ñooring 31 and the ceiling. 12
of the spring retainer is a grease or oil fitting II
vided with an inwardly extending flange 35, the for lubricating the upper face of the leaf spring
free end of which -is adapted to seat on the upper .j 9 the ends of which extend between the ceiling
edge of the web of the „rail 2,'and with a. depend
12 and the ball bearing 18.- This construction
ing leg `“adapted to exigage the inner face of the has vtwo advantages; in the ilrst place yit elimi
web. By following this construction it'will be . nates the >necessity of the usual spring shackles,
seen that the Awooden flooring l1 may be extended thereby making it possible to lower the frame of
over the flange I5, thereby taking advantage of . the vehicle by several inches,-and in the second 20
As .
_shown in Figure 3 the stiifening plate 34 is pro
the width of the rails I and 2.
_ '
In order to maintain the bed of the truck as
. low as possible resort is made to the _Jack shaft>
and spindle assembly as shown in »Figure 3.
I -place due tothe single point contactA of the bail
bearing 18 with the lower face of the spring 0, ..
a rocking motion of th‘e' spring is permitted as '«
well as longitudinal movement.
Extending upwardly` from the outer _end -of the
axle housing 3i is _a bracket 42 provided with a
non-tapered or straight bore 43, the axis of
which lies in a'plane passing _through the axis
of a jack shaft 44, accommodated in the axle
housing 3|'. Seated in _the bore 43 is a wheel
spindle 45, provided with a shoulder 46. adapted
.`,-‘-to abut the Youter face of the bracket -42. Pref
erably the spindle 45 is secured in its position
From the above description it will be observed
that a low-bed,'single-deck heavy duty truck
has been provided in which all available space
between the rear wheels" has been utilized" for the ,
loading platform. All' bends in the main rails
have been eliminated and the frame has been so 30
constructed that‘a very rigid structure is ob
tained. The :lack> shaft and spindle assembly
and 1in par cular the elimination of _the usual
@merely by means o'f a weld 41. Seated over the tapered co ections between the spindle and
outer free end of the' axle housing 3i and the axle housing providesv a simple, rigid construction 35
- .intermediate portion of the spindle`4i isa gearA in which the spindl may be easily removed by
housing 4l, within which is adapted to rotate ' merely cutting its
„a pinion “splines to the end @finie Jack shaft
_. 44, and va ring gear 5| in mesh with the pinion _ - 'I claim;
'49 and secured to the wheel hub 52. The wheel "
hub 52 is journaled on the wheel spindle 4I by
means of bearings 53 and 54, and the jack` shaft
441s iournaled within the axle housingjl by
means of bearings 5I which preferably support
the jack shaft just beneath the upper wall of
‘the housing. Since the pinion 49 is arranged to
mesh with the ring gear 5I it will'be obvious that
the.,rotary motion‘of the jack shaft~44» will be
elded Joint with the axle
1. A vehicle frame comprising: a'pair of spaced
lparallel load rails forming a part of a loading
platform; a pair of spaced parallel forward and
.rear cross rails extending between said load rails:
spring receivers secured in _each -'of' the `yfour
corners deiined‘by said load and cross rails; and
a .Pair of spaced parallel main rails extending
withinn said load ,rails and secured at their rear Y
»ends to said front cross- rail, the main rails being
spaced from the load rails so as to lie just
' transmitted to the wheel hub B2. _The important
features of this construction are (d) that the
inside the spring receivers.
wheel spindle 4l is' disposed directly above the
l 2. A vehicle chassis comprising: a pair of
Jack shaft 44, thereby keeping the. axle housing
spaced parallel load rails forming a part of- a
and the truck frame _as low as possible andÍ
loading platform; spaced forward and. rearl cross
‘ that the wheel spindle 45 is securedf to the axle
rails extending .perpendicularlybetween said _load
housing 3| in a very simple and positive manner
which permits of _its ready removal.
rails and defining _therewith a rectangle adapted
' .
to overlie the a
Formed on _the .outer face of the wheel hub
l2 is a peripheral channel I1 adapted to loosely
e housing of the vehicle ;- spring . .
carriers secured within the four inner corners` of
said rec jfïjgle;
receive an inwardly extending ñange 62 _f_ärmed
.pair of mainrails secured to
the forwal‘d cross rail at _spaced points within the.
integral with or as n part qt an ou hoòd u
bolted or otherwise secured to the ßgear- housing
forward spring carriers and e‘xtending beyond
and in parallelism withjtheforward ends of said
» 4I. Just outwardly of the channel 8| is an vout
load rails: and cross rails secured between «the` -
wardly facing oil channel B4. Ordinarily any oil
leaking outwardly past the ring gear Il goes no
farther 'than the .oil channîel 64 and `dûe _to the
forward en_ds of said load railsand- saidA main
3. A vehicle chassis comprising: 'a pair of
‘rotation of'the hub _I2 any oil received in the spaced parallel load rails _forming
of av
channel 44 is forced to travel outwardly over loading platform; forward and vrear cross rails)
thering ge’ar. However, if by any chance some
'„oil should pass
channel 64 it can go )fno
_ ~the
farther than the flange 42./
extending perpendicularly- 1- between., ï 'said load
¿_ rails so as to form therewith'a rectangle adapted . ~
' Another expedient resorted to in order to'main
‘tain thebedof the truck-as_low as po
the spring carrier assembly -shown in
ble, is _
gure 4."
This assembly comprises anopen ended spring
.carrier 1I provided ,with la ceiling 12. Secured to
tooverlie the axle housing `lof theyehicle; springl -70 "
carriers secured within: the four 'corners ofsäd ' i _'
rectangle; a pair of mainrails securedfto è
forward cross rail at spaced Points within _the for
ward spring carriers’and extending ,beyondv and
in parallelism with the forward ends of‘said load. 1g
rails; and forward and rear end rails secured
across and extending beyond said load rails to
deiìne the width of said loading platform.
4. A vvehicle frame comprising: a pair of spaced
parallel load rails forming a part of a loading
platform; forward and rear cross rails secured to
and extending between said load rails at the rear
end of said frame; a pair of spaced parallel main
rails secured to said forward c_ros-sÍ rail and ex-~
tending forward thereof in parallelism .with said v
load rails; and a pair oi' vehicle springs secured
within the four corners formed by said load rails
and forward and rear cross rails immediately 5
adjacent to and in parallelism with said load rails.
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