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Патент USA US2127934

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Abg. 23, 1938.
RAILWAY> 'rnúcx
.2 sheets-sum1
Filed April `2'0, 1935
mi NM.Hm
Aug. 23, 1938.
yl-l.. M. PFLAGER
Filed April 20, 1935
2 Sheets-Sheet 2
Hari-_g M P//îyen
Patented Aug. 23, 1_938'
Harry M. Pñager, St. Louis, Mo., assigner to Gen
eral Steel Castings Corporation, Granite City,
lll., a corporation of Delaware
Application April zo, 1935, serial No. 11,415 `
14 claims. (ci. 10s-19o)
This invention relates to trucks for' railway
mitted from the track, also absorb some of the
lighter lateral thrusts. especially those thrusts
rolling stock and particularly to trucks for light
weight cars intended for high speed trains: _
Trucks intended for passenger car service have
5 heretofore generally embodied holsters carried
by means of leaf springs supported by hangers
due to the irregularity of the track and the rail
joints, thus causing the truck frame to Jiggle
from side to side as the forward wheels of the 6
truck reach ilrst one irregularity in the track and
- - swinging directly from the truck framing, which
then' another.
framing is yleldingly supported by means of coil
' ‘ springs either placed on top of the journal boxes
swing hangers are inclined from the vertical to -
1o or on equalizers extending from one journalbox
to the other.
'With the construction heretofore used, the
create initial resistance to lateral movement; l0
and the forces due to the jiggling of the truck
Trains are now being built which are of lighter
body v construction and intended for travel at
frame' on straight track are _transmitted to the
.body of the car as they are not of suillcient mag- .
higher speeds than customary heretofore. The nitude to cause the inclined swing hangers to
15 relative light weight of the body compared with yovercome initial resistance, while in this inven- 15
the weight of the trucks, including wheels and tion such forces will be absorbed in the natural
axles, to which must be added in many cases the“ lateral ñexibility ot the ñoating hanger yielding
weight of the motors, gives amuch diilerentratio «elements which have a limited side motion.
between-the weight ofthe car body and the When _the car travels athigh speed and strikes
20 weight of the trucksthan in the ordinary c'ar a curved section of the track, the swing hangers 20
used _in the past, and this introduces new oper- then come into operation oifering increasing re
ating conditions which require a truck adapted sistance to the side motion of the car and ab
to meetthese new conditions. '
sorbing the lateral thrusts of the car body.
.The object of the present invention is to con’I‘he yielding elements supporting the swing
2,5 struct a. truck for light weight cars that will hangers add a new and improved _feature to the 25
produce the best riding qualities at high speeds. ' truck construction', as they not only absorb and
This is accomplished by providing yielding ele-
reduce the vertical shocks delivered to the car
`ments between the journal boxes and truck frame
body by the track, but act also to steady the» car
or between the equalizers and the truck frame, ‘ body on straight track and help the swing
so' to absorb as far as possible the primary shocks
hangers absorb 'severe lateral shocks whenround- 80
from the track to the . truck- frame,_ and prof- ' ing curves, thus producing smooth and easy rid~
l--viding in addition a secondary setvof yielding t ving of the'car.
elements of-dii'ferent characteristics, mounted in‘
the truck frame. 'Swing hangersv are suspended
35 from _these secondary yielding elements, and .
„other yielding elements are supported by the
swing hangers, and the truck bolster, which car-> _’
_ ries the load'of the c'ar. is carried by the latter come in my invention by the use of the iioating
yielding elements. This arrangement provides a ' hanger yielding elements which support the in
¿0' very' simple mounting vof the swing hanger on
The‘lighter the weight of the car body, as
compared with'the truck, the
is the tend- .
ency to 'transmit the forces. set up -by the iig- 'at
gling ot the truck, to the car'body and cause
unpleasant vibrations. This tendency is over->
clined swing hangers.
the-‘truck frame but gives the hanger a -iloatingA further object of this invention isl to pro~ .
movement in addition to its usual Upivotal move- vide a truck with cross transoms so arranged _
ment. y
.- _
'that the floating hanger yieldingelements can
The secondary set 'of yielding elements, which. - be placed inthem in the same 'general transverse
a' for the purpose of this‘description, are called the ‘ plane occupied by the swing hangers. thus econ- 45
iloatlng hanger'springs lor yielding elements, re- omizing in the length ot thewheelbase of the
`ceive the shocks and-vibrations that are transf' :truck and simplifying the construction thereof.
mitted by the truck frame and reduce them. beThese objects and others Aare attained by the.
. tore the `shocks pass into the swing hangers >and structures illustrated in the-accompanying draw
mthrough` lthe yielding elements -carried by the
ings, in
hangers, 'which latter elements absorb further, . Figure l is a top view of> a truck embodying
portions of the shocks which have passed through ' the invention.
the first two mentioned sets of yielding'elements. ` ‘_ Figure 2 is a vertical longitudinal section taken
ñoating- hanger yielding elements.> in on the line 2-2 of Figure '1.
»Fadditiontoabsorbingtheverticalshockstranse `li‘ig'm‘esßandtarevertical-transversesec-gs-
tions taken on the corresponding section lines
of Figure 1.
Figures 5. 6, and ’I are detail views correspond
ing, respectively, to Figures l, 2, and 4 but show
ing a modification.
The truck illustrated in Figures 1 tod includes
a pair of axles I having Journals and Journal
boxes 2. Resting on each journal box 2 are yokes
3 having end portions 4 terminating a short dis
10 tance longitudinally in each direction from the
box. Secured to the portions 4 of the yokes are
yielding of springs i3 and thus are not carried in
to the car body, and such absorption is not
dependent upon overcoming resistance intention
ally provided‘by swing hangers.
'I‘he improved truck has a super-spring ar
rangement which produces easier riding qualities
than the usual passenger truck and is arranged
to dissipate severe» lateral as well as vertical
shocks. Due to the-different characteristics of
the various springs. each has a dampening ef 10
spring seats 5, carrying coiled springs C engag
fect upon the others, and this effect, together
with the other results obtained, produces a
ing spring cap structures 'l formed on the under
surfaces of the truck side frame members or
smooth and easing riding truck.
wheel pieces generally indicated at I.
The wheel pieces I include pedestals I slidably
receiving the journal boxes 2, and the wheel
pieces on opposite sides of the truck are rigidly
tied together by means oi transom structures
generally indicated at i0. Each transom struc
ture includes spaced elements i9 and a trans
verse bottom web il having spring seats i2 ad
jacent each wheel piece. Resting on the seats i2
are coiled springs Il supporting transverse mem#
bers I4 extending between the springs on oppo
site sides o! the truck to maintain the centers
of the springs at an equal distance from each
other. At each end of each member i4 is the
i'iattened spring cap portion i5 having a con
cave bearing II pivotally mounting the cross bar
Vof an inverted U-shaped floating hanger Il.
'Although the forms of the invention described
above and illustrated include transverse mem 16
bers with a spring cap at each end riding on the
coiled springs and rigidly spacing the upper ends
of opposite hangers from each other, it is noted
that the caps for the floating hangers may be
disconnected or free of each other, thus increas
ing the independent action of opposite hangers.
The invention is not limited to the combina
tion of coil and elliptic springs as referred to in
the detail description, but any arrangement of
yielding supports may be embodied in the in
vention including such modifications as pneu
matic springs, or springs in the form of rubber
blocks, or combinations of such springs with the
more familiar coil and elliptic springs illustrated,
and other details of the structure described may 30
be modified in various respects without departing
The legs of hangers Il depend through slots 20
from the spirit of the invention, and the exclu
in the transom bottom member il.
'I'he hangers Il have slots 2i in the lower
sive use of all such modifications coming within
the scope of the claims is contemplated.
portions of their legs, receiving the end portions
I claim:
l. In a railway truck, wheels, axles, journal
of bars 22. The middle portions of bars 22 en
gage the ends 22 of the spring plank 24 which
carries the‘ elliptic springs 25 mounting the main
bolster 28 in the usual manner, the spring bands
26 being seated between the lugs 21 on the spring
plank and the lugs 20 on the bolster. Bolster 2l
has the usual side bearing mountings 30 and cen
.ter bearing portion 2| for cooperating with the
body side and center bearings (not shown).
Wear plates 32 are provided on adjacent sur
faces of the bolster and transoms.
Figures 5, 6 and 7 illustrate a modification in
which .the transom 40 and transverse member 34
have laterally spaced recesses for the coil springs
4i, and the ñoating swing hanger 33 is a single
link located intermediate springs 4| and extend,
ing through slots Il and 3l in members 34 and
4U, respectively. The link is suspended by a pin
3i bridging the slot 3l in _the spring cap and the
link carries the spring plank cross bar ll in the
usual manner.
This structure operates substantially the same
as the form illustrated in Figures 1 to 4 which
functions as follows: the truck load is transmitted
from the bolster 2l to the journal boxes through
the three sets of springs 2l, i2 and I. 'When the
vehicle enters a curved section of the track, or
is submitted to other lateral forces, the trans
verse members I4 move slightly laterally due to
the lateral yielding of springs i3. This lateral
boxes, a truck frame, springs supporting said
truck frame from said journal boxes, members
directly mounted on said truck frame con
structed and arranged to yield vertically and
horizontally, swing hangers supported by said
members, a springplank carried by said swing
hangers, springs supported by said spring plank,
and a bolster supported by said latter springs.
2. In a railway truck, a truck frame including 45
spaced cross transoms, springs supported di
rectly 4by said transoms and constructed and ar
rangedj to yield vertically and horizontally, spring
caps mounted on said springs, swing hangers car
ried by said spring caps, a spring plank carried
by said swing hangers, and a bolster yieldably
mounted on said spring plank.
3.,St_ructure as specified in claim 2 in which
the springs are mounted in recesses in said tran
4. In a railway truck, a truck frame including
spaced cross transoms, springs supported di
rectly by said transoms, spring caps mounted on
said springs, swing hangers carried by said spring
caps, a spring plank carried by said swing hang 60
ers, and a bolster yieldably mounted on said
spring plank, said spring caps being connected by
transverse members extending parallel to said
5. In a railway truck, wheels and axles, a 65
movement is limited by contact between the ex
frame yieldingly carried thereby, springs seated
tremity of the members I4 and the wall I1 on the I
wheel pieces. After this lateral movement of
members I4, the bolster and spring plank swing
mounted directly on said springs,`swing hangers
70 laterally with hangers il and this movement ab
sorbs the balance of the shock due to the rising
arc of the hangers.
’I‘he slight lateral shocks produced by track
irregularities on straight track are delivered to
the truck frame and absorbed by the lateral
said . frame,
suspended from said members, and a bolster
spring supported from said hangers, said first 70
mentioned springs yielding horizontally and ver
tically relative to said frame to provide corre
sponding movements of said members and the
swing hangers and holsters supported thereby
independently of movement of said frame.
6. In a railway truck, frame members each
having spaced spring seats, coiled springs on said
seats, transverse members carriedgby said springs,
hangers pivoted directlyon said transverse mem
bers and being bodily movable with said mem
bers horizontally 'and vertically as well as being
movable about their pivots on said members, leaf
springs carried by said hangers, and a bolsterA
carried on said leaf springs.
7. In a railway truck, wheel pieces, spaced
10 transom structures rigidly connecting said wheel
pieces, springs mounted directly on said struc
tures, transversey members iloating on said
springs, swing hangers carried by said trans
verse members, and `a bolster carried by said
independently of said frame and seats by lateral
yielding of said springs, swing hangers carried
by said member, and a bolster carried by said
12. In a railway truck, a rigid frame, springsA
seated directly on said frame atthe sides of the
truck, a rigid member mounted on said springs
and connecting a spring at one side of the truck
with a spring at the other side of the truck,
the member mounting portions of said springs 10
being yieldable'horizontally of the truck withl
movement of said member independentlyA of any
vertical movement of said springs, devices car
ried independently of each other by said mem
ber at opposite sides of the truck and movable 15
laterally of the truck on said member, and a
8. The combination of elements specified in.- bolster carried by said devices and movable there
claim 'l in which said transom structures include
parts at both sides of said transverse members
for resisting movement thereof longitudinally of
20 the truck, said hangers depending through aper
tures in said structures.
9. In a railway truck, wheel pieces, longitu
dinally . spaced members projecting inwardly
with laterally of the truck relative to said mem
13. In a railway truck, wheels and axles, a 20
main frame carried on said wheels and axles.
springs seated on said frame, spaced transverse
members mounted directly on said springs, swing
hangerssuspended from said members, and a
bolster carried on said hangers, said springs
therefrom, springs 'carried by said members, ' yielding horizontally and vertically independently
hangers pivotally supported on said springs, each
'of said hangers depending through the associated of said frame to produce corresponding move- >
ment of said members independently of the
projecting member, and a holst
eldingly car
movement of said frame, wheels and axles.
ried by said hangers, the hanger ounting por
14. In a railway truck, wheels and ax1es,a rigid 30
tions of said springs being movable horizontally
mounted thereon, coiled springs with their
and vertically under the thrusts of forces trans frame
mitted between said bolster and said wheel pieces. axes disposed vertically and having their lower
1li. In a railway truck, a truck frame, springs portions seated at longitudinally spaced points
mounted directly on said truck frame, swing on said frame, members mounted on the upper
hangers mountedA on said springsand having portions _of said springs, swing hangers pivotally 35
35 floating horizontal yielding due to movement of carried directly by said members, and a bolster
the upper portions of said springs free of con-- carried 'by said hangers, the member support
tact with said frame, and a bolster carried by ing portions of said springs being laterally yield
ing and tree of restraint by said frame permit
said hangers.
11. In a railway truck, wheels and axles, a
frame mounted thereon and having stationary
seats at opposite sides of the truck. springs
mounted on said seats, a member extending from
one of said springs to the other and carried
45 thereby and movable transversely of the truck
ting lateral movement of said members to ab 40
sorb lateral forces set up by the transverse jig
gling oi the truck frame insufficient to move said
hangers on their pivots and thereby prevent such
forces being transmitted to the vehicle body.
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