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Патент USA US2403833

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July- 9, 1946. `
D. H. SPANGLER~
SUSPENSIONAND LOAD EQÚALIZING SYSTEM FOR VEHICLES
Filed Ders.l 10, >1945
8 Sheets-Sheet 1
Jul'y 9,'1'946.
D. H. ÈPANGLER
2,403,833
SUSPENSION AND -LOAD EQUALJ‘ÍZING SYSTEM FOR VEHICLES
Filed Dec. 10, 1945
8 Sheets-Sheet 2
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SUSPENSION AND LOAD EQUALIZING SYSTEM FOR VEHICLES
Filed Dec. 10, 1945
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D. H. SPANGLER.
2,403,833
SUSPENSION AND LOAD EQUALIZING SYSTEM FOR VEHICLES
Filed Dec. 10, 1945
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D. H. SF‘ANGLER`
2,403,833
SUSPENSION AND LOAD EQUALIZING SYSTEM FOR VEHICLES` '
Filed Dec. 10, 1945
8 Sheets-Sheet 5
July 9,1946. I
D. H. sPANGLER
2,403,833
SUSPENSION AND LOAD EQUALIZING` SYSTEM FOR VEHICLES
Filed Deo. 16, 1945
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D. H. sPANGLER
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SUSPENSION AND LOAD EQUALIZING SYSTEM FOR VEHICLES
Filed Dec. l0, 1945 '
8 Sheets-Shee'fI '7
July 9, 194e;
D. H. SPANGLER
n 2,403,833
SUSPENSION AND` LOÁD EQUALIZING SYSTEM FOR VEHICLES
Filed Dec. 1o, 1945
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2,403,833
Patented July 9, 1946
STATES PATENT OFFICE
AUNITED -
2,403,833
SUSPENSION AND LOAD .EQUALTzING
SYSTEM FOR VEHICLES
'
Daniel Herbert Spangler,` Hamburg, Pa.
Application December 10, 1945, Serial No. 633,966
14 Claims.
r(Cl. ZBO-104.5)
1
. 2
load equalizing systems for vehicles.
.
An important Object of the invention is to pro
vide suspension systems for vehicles which will
Figure 6 is a vertical transverse section on the
resiliently support one or more axles to withstand
the stresses resulting from road shock.
~
Figure 4 is a transverse vertical section von the
line 4.--4 of Figure '1.
Figure 5 isa vertical transverse section on the
yline 5-5 of Figure 1_.
The present invention relates to suspension and
` line 6-6 of Figure 1.
’
Figure 7 is a -top- plan View of the beam illus
trated in Figure 1.
Figure 8 is a side view of the beam oi Figure 7,
tically with respect to each other andthe vehicle 10. with a portion in vertical longitudinal section.
Figure 9 is an end View of the beam of Figure '7.
frame, but which will withstand all torsional
Figure 10 is a vertical transverse section on the
stresses.
line Ill-lil of Figure 8.
Another object of- theinvention is to provide a
Figure 11 is a vertical transverse section on the
suspension system whereby one or more axles
line lI-II of Figure 8.
will be permitted to move vertically with respect
Figure 12 is a detail view Showing the resil
to the vehicle frame, but the axle or aXles will
ient mounting included in the present invention
be kept in properly tracking relation' with regard
Another object of the invention is to provide
suspension systems for use with dual axle assem
blies Which will permit the -axles to mOVe Ver
' to the vehicle.
in sidek elevation.
«
'
Figure 13 is a vertical section on the line I3----I3
A further object ofthe invention is'to provide
a resilient suspension element for vehiclesv _and
which is of such design that it will automatically
of Figure 12.
adjust itself to accommodate varying loads andy
lli-I4 of Figure 13.
road
shocks.
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of suspension for dual axle assemblies, the view
showing the axles and axle housings in vertical sec
tion andbeing taken on .the line l5--|5 of Fig
ì
In 4anyV vehicle using leaf spring suspension, all
unevenness of the road sets up a twisting action.
This twist is transmitted directly yto the vehicle
frame through the leaf spring pack since the very
structure of a series 0f spring leaves does not
allow for any torsional strain absorption. ` `
Y ,
Figure 15 is a side elevation of la modiñed form
,
A still further object is to provide a suspension
structure which will eliminate side sway of the A
vehicle.
~
Figure 14 is a horizontal section on the line
ure 16.
_
v
Figure 16 is a plan view of the Figure 15 struc
ture.
t3o
Flgurel'l `is an end view -Of theFigure l5 struc
ture.
..
Figure 18 is a transverse vertical section on the
line |8--I8 of Figure 15.
"
With my coil spring suspension, the spring
Figure 19 is a transverse vertical section on thè
transmits only vertical motion and all torsional
»
l
stress is dissipated through the various compen 135 line |9-l9 of Figure 15, and
Figure 20 is a transverse section on the line
sating joints and torque rods included in the
'2D-_20 of Figure 15.
‘
structure.
Referring to Figures 1 to 14, inclusive, the
Other objects and advantages of the invention `
principal elements illustrated in those figures are
will be apparent from the following description
and drawings, wherein like numerals refer to Sim
ilar parts throughout the several views.
In the drawings:
'
Y
Figure 1 is a side elevation of ai'orm of dual
axle suspension included in the present invention,
the View'showing the axles and axle housings in _
40 as follows: The numeral 30 designates each of
the two side frames of a vehicle, for example, a
motor truck or a‘trailer, andthe numeral 32 des
ignates a usual cross-brace for the vehicle. As
best shown in Figures 2 and 3, an inverted U
45 beam 33 is secured to andextends between the
vertical section and being taken on the line I-I
two side frame members 3l) at a point between
the axle housings 34 and 35 of a dual or tandem
of Figure 2.
axle assembly. vA resilient or shock absorber ele
Y,
ment 36 comprising two vertically opposed cyl
Figure 2 is a plan view of the Figure 1 struc
ture, with portions of the vehicle frame broken 50 inders is secured to each side frame 30 within
cross-beam 33. The lower cylinder of each ele
away and a portion in horizontal section on theY
ment 35-rigidly carries a bracket 31 on which a
line 2--2 of Figure 1.
’ beam 38 is pivotally mounted for swinging move
Figure 3 is an end view of the Figure 1 struc
ture, the view looking from the right with respect
ment about va, horizontal axis. Below the pivot
to Figure 1.
for beam 38, each» bracket 3'! also includes axial
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2,403,833
4
1y spaced pivots for a pair of torque rods 38 and
-40 which, as best shown in Figure 1, extend in
opposite directions longitudinally of the beam
retain lubricating materials within the cylinder
structure, all as illustrated'in Figure 13.
It will be observed that the cylinders 48 and
The ends of the beam 38 are respectively
, 49 fit closely, are of such large diameter and have
connected by means of universal or gimbal con
’ nections 4I to ñanged collars ñxed to the axle
housings 34 and 35, the connection 4| being po
sitioned above the axle housings. -- The free ends
sufficient overlapping length under all conditions
that side sway of one with respect to the other
will be prevented.
Therefore, the body of the
vehicle cannot have the objectionable side sway
which occurs with lear- springs.
of the torque rods 3.9 yand 40 are connected to
The construction of the bracket 31 is best illus
the flanged collars of the axle housings by a uni 10
tion, this connection being, positioned below the
trated in Figures 12 and 13. Referring to these
figures, it >will be observed that the upper por
axle housings. A radius rod 43 is pivotally con
tion 55 of the bracket has the form of an up
nected to each end of each beam 38 so that the
wardly flanged circular disk, which, as stated
above, forms the bottom of the lower and movable
cylinder 43. An aperture 56 extends horizon
tally through the bracket 31 adjacent its upper
portion 55 and a pin 51 extends through and is
versal joint 42 such as a ball and socket connec
beam and radius rod may swing relative to each
other about an axis extending transversely of the
vehicle.
Each radius rod 43 isconnected to a
bracket 44 which projects downwardly -from the
rotatable in this aperture to serve as a :pivot for
vehicle side frame at apoint spaced from the
axle housings and on the opposite side of the 20 the beam 38 as Vhereinafter described. The ex
treme lower portion of bracket 31 is bifurcated
axle housings from the resilient element 35.
and a pin 58 extends through and is ñxed in
Each radius rod 43 is connected to its corre
apertures in this portion to serve as a connec
sponding bracket 44 by a connection generally
tion for the torque rods 39 and 40 as hereinafter
designated 45 and which is of such design that
the radius rod may swing withrespect to its 25 described.
The beams 38 provided adjacent each side
bracket 44 on an axis transverse ofthe vehicle
and may also slide lengthwise of the vehicle
frame 38 of the vehicle are pivoted to the re
frame and bracket 44.
spective brackets 31 as best illustrated in Fig
’
ure l. The detailed structure of each beam 38
The structure of Figures 1 to 14 may be de
scribed in more detail as follows: The resilient 30 is shown in Figures 7 and 8. ' It will be observed
from these views that each beam is of generally
or shock absorber- element 36 provided on each
U-shaped form in transverse section to include
side frame 38 of the vehicle includes an outer and
a top wall 60 and side walls El, with transverse
upper cylinder 48 closed at its upper end and
webs 62 adjacent its ends, additional webs 63
this cylinder is welded or otherwise secured in
the underside of the cross-beam 33 as best shown 35 being provided adjacent the median portion of
in Figures 12- and 1.3. Asis indicated in the lat
ter figure, each end of the cross-beamßä extends
into the adjacent side frame 36 and the side
the beam. `At the central portion of the beam
able cylinder 49 is reciprocably mounted in each
with respect to its bracket 31 about an axis ’ex
the top wall G8 is’cut away so that the beam may
laterally enclose the bracket 31 as illustrated
in Figure 13. At its upper and Ycentral portion,
frame lower ilange is recessed so that the cylin
der 48 may extend downwardly in the frame. In 40 each side wall 6l of the beam is provided with
an aperture 64 in which the _ends of the pin 56
this way, each cylinder 43 is ñrrnly Secured aginst
of bracket 31’will be fixed.` It will be observed
sidewise movement in any direction. As best i
from Figure 1 that each beam 38‘may swing
shown in Figures l, 12 and 13, a lower and mov
ñxed cylinder 48, the lower -end of each cylinder 45 tending transversely of the'vehicle, each lbeam
also having a vertical movement with its bracket
49 being secured to the upper face of the bracket
31 and the lower cylinder 49 of the correspond
.31 so that the bracket closes the lower end of
ing resilient'supporting element 3S.
this cylinder. A block 5i) of wood or the like may
The torque rods 39 and 40 are ofV solid con
.be mounted within cylinder 4S to rest on bracket
’ 31. A helical spring 5i extends between the up 50 struction and, as best illustrated by the dotted
line showing of those rods in Figure 2, and the
persuriace ofV the block 5B and the upper end
sectional showingthereof in Figure 4, each rod is
ñattened along vertical lines at its inner end and
the flattened portion includes an aperture which
frame to an extent somewhat as shown in Figure 55 surrounds the pin 58 carried in the lower end
of each bracket 31. As shown in Figures 4 and
13. Within the spring 5I, a second and heavier
13, the pins >58 may be flanged intermediate
4helical spring 53 is provided. However, as shown
their length to space the torque ’rods from each
in Figure 13, spring 53 is of shorter length than
other. By this arrangement, the torque rods
the spring 5I and will not normally contact with
4the upper` end wall 52 of the fixed cylinder 48. 60 may swing in vertical planes with respect to the
brackets 31 and the torque rods will also move
Under heavy load conditions, or under ext-reme
vertically with the bracket. It will be observed
-road shock, the outer and lighter spring 5I will
wall 52 of fixed cylinderv 48, spring 5I being of
sufficient strength that, under normal load, it
will hold the beam 38 spaced from the vehicle
that on the bracket 31 the points of pivotal con
be compressed sufficiently to cause a part of the
load to be absorbed by the inner and heavier 65 nection of the torque rods and beam 38 are ñxed
with respect to each other and are vertically
spring 53.' The lprovision .of a lighter normal
spaced along the median lines of the brackets.
load carrying and shock> absorbing spring to sup
The structure whereby the opposite ends of
’port weight and take up shock makes the pres
each beam 38 are connected to an axle housing
ent Asuspension more flexible under such condi
tions. Nevertheless, the provision of theV inner 70 is as follows: As is illustrated in Figures ’1 to
11, an extension 10 projects beyond the web 62
"and heavier spring enables the structure to prop
of
each end ‘portion of a beam, the extension 10
`erly absorb heavier‘road shocks. In order to eX
including a downwardly extending shoulder 1I
-clude` dust and dirt from the interior of the cyl
at its outer end. Aligned apertures 12 and 13
inder structure, suitable dust- covers-49’ may be
are
provided in each shoulder 1I and web 62„re
75
provided, also packing rings may be installed to
` 2,403,833»
spectively., By this construction, a downwardly
6
1 and 5 and this end is secured between upwardly
facingV recess 14 is provided at each end of each
projecting ears 86 (Figures 7 and 8) by a pin 81
beam 38. As is best shown in Figures 3 >and .5,
fixed to'and extending between the ’ears and
a collar or sleeve 15 is fixed to each end Yof each
through aperture 85. A radius rod is provided
axle housing at a point inwardly of the adja- ' Ul at each end of -each beam. As best shown in
cent wheel and beneath the end of the corre
the lower right hand portion of'Figure 2, the
sponding beam 38. A sleeve 15 appears in side
`outer portion of each radius rod 431s slidable
elevation in Figure 1 and it will be observed
from that ñgure and Figure 5` that each sleeve
in and extends through a cruciform element 88,
Each element 88 includes pins 89 fixed thereto
includes a central portion 16 which embraces the 10 (Figure 6) and rotatable in apertures in the lower
axle housing, a downwardly projecting tongue
ends of the bracket 44. In this way, the radius
18 at its outer edge and two upwardly project
rod can swing both with respect to beam 38 and
ing tongues 11, the tongues 11 being spaced the
bracket 44 on axes extending transversely of the
length ofthe collar 15. A pin 18 is iixed in aper
vehicle. 'A spring 99 encircles each radius rod
tures in the upwardly extending tongues 11 and 15 43 beyond the cruciform ñtting 88, the inner end
this pin carries a cruciform element 19 shown
of the spring bearing on fitting 88 and the outer
in the broken away portion at the lower left hand
end of the spring bearing against a washer vand
portion of Figure 2. The «cruciform element 19
nut assembly l9| positioned at the outer end of
is rotatable about the ñxed ‘pin 18 on an axis
the radius rod. While each radius rod may slide
transversely of the vehicle. Pins 80 are ñxed 20 through its fitting 88 and thereby generally
in cruciform element 19 to project at .right
lengthwise of the vehicle, the spring 90 exerts
angles to pin 18, the axes of all of these pins
an outward pull on the rod.
, lying in the same plane. The pins 88 are rotat
The radius rods 43 assist in preventing the
able on an axis lengthwise of the vehicle in the
dual axle assembly from rotating about a verti
apertures 12 and 13, respectively, of the end re
cal axis midway between the spring mounts 36,
cess 14 of beam 38. Therefore, cruciform ele
through the fact that a shock absorber element
ment 19 is rotatable on an axis extending length
35a is positioned at each end of the dual axle
Wise of the vehicle.
,
v
assembly primarily prevents such rotation and
It will be observedthat the pivot points 4l
thereby assures proper tracking. The radius rods
and 42 lie in the same vertical plane as the axis 30 48~and their associated springs 58 have the fur
of the corresponding axle housing and axle.
ther function o? urging the axlesl to return
ByA this construction, the beam k88 and an axle
smoothly to anormal position from any upward
housing may swing with respect to each other on
or downward movement with respect to the verti
an axis extending transversely of the vehicle and,
cal frame. That is, the fact that the radius rods
in addition, have relative movement `on'an axis
are provided at both ends of each side of the
extendinglongitudinally of the vehicle. There
lfore, yan axle housing Ymay either move upwardly
or-"downwardly without endwise tilting, or may
assembly holds the assembly under tension and
prevents undue horizontal and vertical swing of
the beams 38 relative to the brackets 31. Also,
’tilt Vfrom end to end, because ofthe universal
the spring-loaded radius rods act as dampeners
¿joints 4| thus provided between each end of each 40 or shock absorbers with regard to vertical move
axle housing andthe corresponding ends of the
>beams'38.
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‘j’ k¿As indicated in Figures 1 »and 5, the outer end
»of each-¿torque rod 391and 40 is connected to the
ment of the springs 5l _and 53.`
l
' It will be observed from the lower left hand
portion of Figure 2, and also from Figure V5, that
the cruciform elements 18 have a width less than
‘lower-tongue 16 of axle housing collar 15- by 45 the space between the tongues 11l on the corre
a balland socket joint, thetongue 15 carrying
»a-stud 8| including a ball-shaped portion to i'lt
a» socket in the free end of the corresponding
-torque rod. This `universal connection, generally
spending collars 15. As is also indicated in these
figures, when the dual axles »are horizontal, each
cruciform element 18 will be so positioned on` its
cross-pin 18 that av space will exist being the
designated bythe numeral 42, will further en 50 outer tongue 11 and the'adjacent end of theele
able the axle housing to tilt lengthwise or move
ment 19. Also, as shown in Figure 4, and Vin
vertically and translationally as described in the
dotted lines in Figure 2, the inner ends ofthe
Ypreceding' paragraph.
'
torque rods 39 and 48 are normally spaced'from
'It will be perceived that the provision of the
the pin flange 58’ and the inner arm 31’ `of the '
beam 38 and the torque rods 39~ and 48, at each 55 vbrackets 31. By this arrangement,` when an
wheel end of the tandem axle assembly, with the
axle tilts, the corresponding cruciform element
beam and torque rods pivoted to a bracket be
may slide on its pin 18, and the corresponding
tween the two axle housings, provides a parallelo
torque rods may slide on pin 58. This will main
gram connection between both ends of the axles.
tain the beam38 and radius rod in their common
More particularly, neither axle housing can ro 60 and normal vertical plane. Because of the -fact
tate on its own axis and with respect to the
that the surfaces of the elements 19 nearest the
other axle housing, regardless of whether it moves
longitudinal center-line of the vehicle are nor
up and down by endwise tilting or translation
mally in Contact with the adjacent tongues 'VlA
ally, because the pivot points 4| and 42 are the
the axles 34 and 35 cannot move along their axes.
It will be noted from'the above'that the struc
ture described in yFigures 1 to 14 will hold the
axles of the dual axle assembly against rotation
corners of one end of a parallelogram which has
'its opposite end corners positioned at the pivot
` points 4I rand 42 at the same end of the other
axle. In short,'though an axle housing may move
with respect to each other, but without preventing
upwardly or downwardly with respect to its op
either end of either axle from moving vertically
posite end, as wellas with respect to the other 70 infaccordance with the road surface.' Moreover,
jaxle housing, a Vpivot point _4l will always be
the resilient mounting 36 fo-r each beam 38, taken
`directly above a pivot point 42V andthe axle hous
with the springs 90 of the radius rods, will insure
" ings cannot turn with respect to each other.
that all road shocks will be smoothly absorbed.
"f Each> radius rod 43 is provided with an aper
It will be understood that the structure described
'ture 85 in its inner end as best-shoWn-in Figures
in Figures 1 to 14 may be used -in an assembly
2,403,833
7
where both axles are either dead or driven, or
one axle is‘dead and the other driven.
Referring to Figures 15 to 20, which illustrate
a modified form of dual axle assembly, this form
differs from that of Figures 1 to 14 primarily in
that the torque rods used therein are positioned
above the beams and radius rods are connected
directly to the axle housings, instead of to the
beams.
_
In more detail, in Figures 15 to 20, the numeral
|00 designates the side frame elements of >the
vehicle, these elements being rigidly cross-con
corresponding pin |26, each radius rod extending
outwardly to a bracket 44a secured to the vehicle
frame at a point spaced from its axle housing and
on the opposite side of the latter from the shock
absorber 36a. Each radius rod |21 is slidable
through a cruciform iitting 88a, which is rotat
able in the bracket 44a on an axis extending
transversely of the Vehicle, the crucìform fitting
88a being identical with the ñtting 88 of Figures
1 to 14. A spring 90a is mounted about the outer
portion of each rod |21 to function in the same
manner as the spring 90 of the structure of
Figures 1 to 14.
As is shown in Figure 18, and in dotted lines in
Figure 16, the inner ends of the torque rods |21
and |22 are normally spaced from the pin iiange
|03’ and the inner leg |02' of bracket |02. As
shown in Figure 19, the lug | I | carried by pin |09
Figures 1 to 14. The element 36a has a con
is normally spaced from the outer ear l I3’ of the
struction identical with that described with regard
20 pair of ears ||3. Because of this- arrangement,
to the preceding figures.
when an axle tilts, the beam |06`and radius rods '
As is best shown in Figure 18, a bracket |02
|21 will remain in their normal vertical planes.
provided at the lower end of the movable cylinder
The operation of the structure of Figures 15
of each shock absorber 36a has a cross-pin |03
to 20 is identical with that disclosed in Figures
ñxed therein and provided with a central flange
|03’. In addition, the extreme lower portion of 25 1 to 14, the primary difference between the two
structures being that the torque rods |2| and
each bracket |02 is provided with a horizontally
|22 of Figures 15 to 2O are positioned above the
and transversely extending bore |04 which car
beam |06 instead of below the beams as in the
ries a cross-pin |05. A beam |06 is pivoted to the
structure of Figures 1 to 14. As in the previous
lower end of each bracket |02 by means of up
wardly extending ears |01, the ears being 30 structure, that just described can be used with
either two driven or dead axles, or one of each.
apertured to engage the ends of the pin |05 and
'I‘he terminology used in the specification is
the pin being secured to the ears. Each end of
for the purpose of description and not of limita
each beam |06 has a pin |09 fixed therein and
tion, the scope of the invention being defined in
extending longitudinally from the beam as illus
trated in Figure 15. Beyond the beam, each pin 35 the claims.
nected by a transverse beam I0 | . A resilient sup
porting element or shock absorber 36a, is posi
tioned at the intersection of each side frame |00
and cross-member |0| just as has been described
above in connection with the structure of
|09 has a sleeve | l0 rotatable thereon, the sleeve
I claim:
l. In a suspension and load equalizing system
for vehicles, Vehicle side frame members, a tan
dem axle unit including axle housings, a pair of
||2 extends. The pin ||2 is iixed in spaced ears
||3 which project downwardly from a fitting H0 4,0 brackets, means to resiliently secure said brackets
for vertical movement with relation to the re
secured near the wheel end of the adjacent axle
spective side frame members at points between
housing ||5 and sleeve ||0 is rotatable about pin
the axle housings, upper and lower elements piv
||2. In this way, each beam |06 and the axle
oted to each of said brackets at vertically spaced
housings at the ends thereof may move with ree
points and pivotally connected to said axle hous
spect to each other about the axes of the pins |00
ings adjacent the ends of the latter to maintain
extending longitudinally of the beams and vehicle.
the
latter against rotation with respect to each
In addition, the axle housings may swing with
other and about their axes, and means carried by
respect to beams on the axes of the pins ||2 ex
the side frames to exert tension on said axle hous
tending transversely of the beams. In short, uni
ings longitudinally of the vehicle.
versal joints are thereby provided between the
2. In a suspension and load equalizing system
beams and axle housings.
for
vehicles, vehicle side frame members, a tan
Each axle housing fitting | |4 includes an inte
dem axle unit including axle housings, a pair of
gral and upwardly extending plate |25 and a iixed
brackets, means to resiliently secure said brack
pin |20 projects laterally iro-rn each plate as shown
ets for vertical- movement with relation to the
in Figure 15, The outer end of the corresponding
respective side frame members at points between
torque rod is p'ivoted on the pin |20, the two torque
the axle housings, upper and lower elements piv
rods on each side of the assembly being respec
oted to each of said brackets at vertically spaced
tively designated by the numerals |2i and |22.
points
and pivotally connected to said axle hous
As has been indicated above, a torque rod I2! and
a torque rod |22 are associated with each beam (30 ings adjacent the ends of the latter to maintain
the latter against rotation with respect to each
|06, the inner end of each torque rod being pivoted
other and about their axes, one of said elements
on the pin |03.
being pivoted intermediate its length to said
By the above-described pivotal connections, the
bracket and the other element comprising two
axle housings can tilt with respect to the beams
rods extending in opposite directions from said
|06 or rotate on their axes with respect to the
bracket and longitudinally with respect to the
beam, but the two axle housings cannot turn with
vehicle, and means carried by the side frames to
respect to each other because of the parallelo
exert -tension on said axle housings longitudinally
gram relationship afforded by the beam |06 and
of the vehicle.
Y
the torque rods and the manner in which the vari
3. In a suspension and load equalizing system
ous pivots are arranged with respect to each
for Vehicles, vehicle side frame members, a tan
other.
dem axle unit including axlehousings, a pair of
As shown in Figure 19, the upwardly extending
brackets, means to resiliently secure said brackets
plate |25 of each axle housing iitting | I4 also has
for vertical movement with relation to the respec
`a pin |26 fixed therein to extend laterally. The
||0 including an upwardly extending and trans
versely apertured lug ||| through which a pin
inner end of a radius rod |21 is pivoted on the
tive side frame members at points between the
' „2,403,833
l, axle housings., upper a?dflowergdements,pivoted ’
point vertically spaced -with regardto the pivot
of> the correspondingbeam, the respectivelrods
of each pair projecting in opposite directions and
longitudinallyof said beams, the ends ofv said
to each of said bracketsat vertically spacedpoints
and pivotally connected to said axle housingsadf
jacent theends ofithe Ylatter to maintain-.the lat
ter against rotation- with!A respect toA each other
and about their axes„.said«lower element compris
"
, ing a beam pivoted intermediate its length tol said
beams being pivotally connected vto the ends of
the respective axle housings-and the free ends ‘y
„ofsaid rods being pivotally connected to> there
bracket and vsaid upperfelementcomprising two
spective'axle housings at a point on the latter
y rods each pivoted tosaid brackety and extending.'l - oppositethe beamrpivot, all of said points of piv
in opposite directions therefrom andylongitudi
otal connection being so Vrelated that- the pivot
nally of the vehicle, and means carried by the ` points on the corresponding: ends ofi-the vaxle
--side frames to exert tension von said axle housings Í yhousings define the corners of a parallelogram.
longitudinally of thefvehicle; " K,
n
'9. _In- a suspension, and loadvequalizingasystem
for vehicles, a pair of body framerside members,
a 'tandem` axle -unit„including axlev housings, -a
_4. In a suspensionand load equalizing system
for vehicles, vehiclesideirame members, ar tan
dem axle unit including -axle housings, .a pair of "ï
brackets, means to resiliently secure said brackets
pair of brackets, means to resiliently >secure said
„brackets below ,and lfor vertical .movement ¿with
for vertical movement withrelation to the're- -
relation tothe. respective> side frame members,- a
spective side frame members at pointsbetween
. pair of beams, each >pivoted intermediate its ends
theaxle -housings, upperand lower elements piv- ,_20 to one of said bracketsv and,- adapted ,to lextend
oted to each of said brackets at vertically spaced i " longitudinallyof the ~ vehicle-frame, ¿af pair «of
points and pivotally connected ‘to said axlehous
torque rods pivoted to each ofl said brackets be'
low said beams, the respective rods oVf-eachpair
ings adjacent the ends of the latter to> maintain
ythe latter. against' rotation with ,respect- to each
other and about their axes, said upper element
v comprising
a
beam ¿pivoted’intermediate
projecting in opposite> directionsand longitudi
its
"
nally of'said beams, the-ends of said beams .being
pivotally connected tothefuppenportions' of .the
A ~length, to _saidbracket and said lower element
ends of the respective yaxleh'o'using andgthe .free
' comprising, twd'rods each rp-ivoted'to saidbracket
endsof said rods being pivotally connected >to
.and extending-in opposite directions therefrom . the lower portions of the ends ofthe respective
and longitudinally of the vehicle, vand meansv car-I ,_ axle housings,` all of saidÍ poi'ntsgof ¿pivotal -`con.
ried by the side frames to exert tensionen said
axle housings longitudinally of the vehicle.
5. In a suspension and load lequalizing system~
for vehicles, a tandem axle unit including axle
housings, a pair ofbrackets, means >to resiliently
secure said-brackets below and ,for vertical move
ment with relation to therespectiveside frames
of the Vehicle ata point between lthe axle hous
nection’being so related that lthepivot.points ,on
the corresponding ends or the axlefhous'ings d_e
fine the corners »ofa parallelogra'm.»,v
l, .
„
_
` 10. In a suspension> andv load equalizing sys
tem for vehicles, a pair ,of _bodyirameside mem
bers, a tandem axle, unit 'including'axle housings,
a pair of brackets, meansltolresiliently .secure
said brackets below _andjfor vertical movement
ings, a pair of beams, one pivoted intermediate its
ends on the respective brackets and for vertical
swinging movement with relation to said bracket,
with relation to the'respectivefside'frame mem
bers, a pair of beams, each pivoted: intermediateV
its ends to one of said brackets and adapted to
a pair of torque rods pivoted to each of rsaid
brackets at a point vertically spaced with respect
extend longitudinally ci" the vehicle frame, a pair
A of torque rodsV pivoted to each of said brackets
to the corresponding beam pivot point, said
torque rods being pivoted for movement in a sub->
stantially vertical plane, said beam and the free
above said beams, the respective rods of each
pair projecting in opposite directions and longi- '
tudinally of said beams, the ends of said beams
being pivotally connected to the lower portions
ends of said torque rods being pivoted to the re- `
spective axle housings at points on said housings
of the ends' of the respective axle housings and
vertically opposite each other, said last-named
the free ends ofr said rods being pivotally con
pivot connections V‘being universal joints, andy 50 nected to the upper portions of the ends of the
means to resiliently connect corners of said beam,
respective axle housings, all of said points of piv
torque rod and axle housing assembly :to respec
otal connection being so related that the pivot
tive points on the side frames of the vehicle which
are spaced lengthwise of the Vehicle fromsaid
points on the corresponding ends of the axle>
housings deñne the corners of a parallelogram.
55
11. In a suspension and load equalizíng system
6. A suspension and load equalizing system of
the character described in claim 5 wherein the
beams are pivoted to the brackets and axle hous
for vehicles, a pair of body frame side members,
assembly.
a tandem axle unit including axle housings, a
pair of brackets, means to resiliently secure said
brackets below and for vertical movement with
relation to the respective side frame members,
a pair of beams, each pivoted intermediate its
ings above the corresponding pivot points for the
torque rods.
7. A suspension and load equalizing system of
the character described in claim 5 wherein the
beams are pivoted to the brackets and axle hous
ends to one of said brackets and adapted to
ings below the corresponding pivot points for the
. torque rods.
8. In a suspension and load equalizing system
for vehicles, a pair of body frame side members,
a tandem axle unit including axle housings, a
pair of brackets, means to resiliently secure said
brackets below and for vertical movement With
relation to the respective side frame members, a
pair of beams, each pivoted intermediate its ends
to one of said brackets and adapted to extend
longitudinally »of the vehicle frame, a pair of
torque rods pivoted to each of said brackets at a
65
extend longitudinally of the Vehicle frame, a pair
'of torque rods pivoted to each of said brackets
at a point vertically spaced'with regard to the
pivot of the corresponding beam, the respective
rods of each pair projecting in opposite directions
and longitudinally of said beams, the ends of
said beams being pivotally connected to the ends
of. the respective axle housings, the free ends of
said -rods being pivotally connected to the re
spective axle housings at a point on the latter
, vertically opposite the beam pivot, al1 of said
points of pivotal connection being so related that
the pivot points on the corresponding ends of the
2,403,833
12
[ing longitudinally sudabie and vertically unable
parallelo
11
vaxle housings denne the corners of a
Igram, radius rods, one pivoted to and extend
ling longitudinally from each corner of the axle
yhousing and beam structure, brackets adapted to y
receive the free ends of the respective radius rods
and secured to the corresponding vehicle side
' with respect to its vehicle frame bracket.
13. In a suspension and load équalizing sys
tem for vehicles, a pair of body frame side mem
bers', a tandem axle unit including axle housings,
'a pair of brackets, means to resilientlyvsecure
said brackets below and for vertical movement
frame at a point on the opposite side of the ad
with relation to the respective'side frame mem
'jacent axle housing from said ñrst-named brack
bers, a pair of beams, each pivoted intermediate
et, each of said radius rods being longitudinally
slidable and vertically tiltable with respect to 10 "its ends to one of said brackets and adapted to
extend longitudinally of the vehicle frame, a pair
its vehicle frame bracket.
i
of torque rods pivoted to'each of said brackets
12. In a suspension and load equalizing sys
above said beams, therespective rods of each pair
tem for vehicles, a pair of body frame side mem
projecting in opposite directions and longitudi
bers, a tandem axle unit including axle housings,
a pair of brackets, means to resiliently secure 15 nally of said beams, -the ends of said beams be
ing pivotally connected to the lower portions of
said brackets below and for vertical movement
the ends vof the respective axle housings and the
with relation to the respective side frame mem
bers, a pair of beams, each pivoted intermediate
'_free ends of said rods being pivotally connected to
pair of torque rods pivoted to each of said brack
ets below said beams, the respective rods of each
nection being so related that the pivot points on
the corresponding ends of the axle housings de
ñne the corners ofra parallelogram, radius rods,
Vthe upper portions of the ends of the respective
its ends to one of said brackets and adapted to
extend longitudinally of the vehicle frame, a 20 'axle housings, all of said points of pivotal con
pair projecting in opposite directions and longi
one pivoted to and extending longitudinally from
being pivotally connected to the upper portions of 25 each end of each axle housing,'brackets adapt
ed to receive Ythe free ends of the respective rods
the ends of the respective axle housings and the
and secured to the corresponding vehicle side
free ends of said rods being pivotally connected
frame at a point on the opposite side of the ad
to the lower portions of the ends of the respec
jacent axle housing from said first-named brack
tive axle housings, all of said points of pivotal
connection being so related that the pivot points 30 et, each of said radius rods being longitudinally
slidable and vertically tiltable with respect to its
on the corresponding ends of the axle housings
vehicle frame bracket.
deñne the corners of a parallelogram, kradius
1_4. A suspension and load equalizing system of
rods, one pivoted to and extending longitudinal
the character described in claim 1 wherein the
ly from each corner of the respective beams,
connection between'one of said elements and the
brackets adapted to receive the free ends of the
vaxle
housings comprises a universal joint includ
respective radius rods and secured t'o the corre
ling
a
cruciform member.
sponding vehicle side frame at a point onthe op
DANIEL HERBERT SPANGLER.
posite side of the adjacent axle housing from said
first-named bracket, each of said radius rods be
tudinally of said beams, the ends of said beams
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