close

Вход

Забыли?

вход по аккаунту

?

код для вставки
0d. 1, 1946.
�8,520
A_ 5_ KROTZ
TRUCK FOR RA?IL VEHICLES
v Filed June 29, _1943 V
2 Sheets-Sheet l
.
35%.
Wil./li l.
M.
ITYW NBRm
_ZE-�72272?
_H/ in Y5176151222
,-5 '鋒m y?
oct. 1, 1946.4
'
A, s, KROT'Z
'
.
2,408,520
TRUCK FOR RAIL VEHICLES
-Filed June 29, 1943
2 Sheets-*Sheet 2
/65
-
_infn/ba...
'_H/L/頸 512550Z?
Patented Oct. 1, 1946
2,408,520
* UNITED "STATES PATENT? OFFICE
fnlvins.Kr騮nnkmmohiaassigmr to TheBlF.
f
Goodrich Company,y New York, N. Y., a corpora- u,
l
` �
`
"
� "
, tion of New York` "
Application J'unev 29, 1943, Serial No.` 492,682
g
.
l
l
e蚾laims.` (011105-190)
.
.
2
.
This invention relatesto vehicle trucks and
.the drawings.' Each .side frame is formed with
inwardly extending guide brackets I I, I I.? adapted
more particularlyto trucksfor vehicles operated
.upon rails.
. �
to guide a bolster I2.
-
With increase in the speed of operation of rail
way trains and similar rail-operated .vehicles it
has become desirable to provide more effective
cushioning of the load, to' improve riding >com
fort, and to reduce noise and vibratiomas well
as to improve braking of the vehicle.
The bolster is suspended
from the respective side .frames by hanger links
I3�, I 4 pivoted to the side frames, as at I5 and
supporting stirrups such as I6 which engage
under the ends of the bolster in fulcrum notches
such as I'I. The arrangement is such that the
�
bolster has limited floating movement cross-wise
of the truck but is restrained against fore-_and
The principal objects of the present invention
.are to provide increased cushioning ofthe load,
vtordamp out shock Vand vibration, to provide
.springing ofthe wheels of the truck,- to eliminate
vcontact of the journal boxes with the side frames,
to provide improved braking of the wheel, and to
_provide adjustment of the Vcushioning means.
Aaft movement by the> guide brackets II which
closely flank its vertical sides. Preferably the
fulcrum notches I1 are spaced farther'apartthan
the pivots l 5 of the side frames so that movement
>of the bolster from its normal .position toward
either side frame such as would be induced by the
centrifugal force4 due to travel about a curved
.following description and the- accompanying
track is accompanied by elevation `of vthe end of
the bolster adjacent that side frame thereby tilt
Of the drawings, �
,
�
,
20 玦ng a car (not shown) _supported by the bolster
Fig. l is a side elevation of a rail-trucklcon
toward the center of curvature of. the track -and
structed in?accordance with and embodying the
causing the 駉or of the car .to assumea position
invention, parts being broken away and parts
more nearly perpendicular to the resultant o_f the
These and other objects will appear from .the
drawings,
~
,
`
shown in section.
?
L
y
.
.�
_Y
.vertical load of_,objects thereonand thev centrifu
,
- Fig. 2 isa plan view thereof, one`side being .25
broken away.
\
,
Fig, .3 isa sectional view taken on line 3?7-3 of
Fig.
..
l
� -Fig. 4 is a sectional View taken on line lla-4 of
Fig.
l.
-
' .
Fig. 5 isa detail
'
'
`
View, partly broken away and-
partly in section showing a modified construction
ofthe torsion cushioning means.
v
'
�
l
gal force acting upon them.
l o
v
.
.
.For supporting the vehicle from its truck and
,
'
Fig. 6 is a sectional view thereof, taken online
Ali--� 0f Fig. 5.
Fig. 7 is a detail viewof another modification
of the invention, showingvthe torsion cushioning
means, parts being broken away and parts shown
Vpermitting relative' rotational movement of _the
truck and thesupported car body in a horizontal
.plane,.the bolster I2.is.iormed with a center plate
.2!! on its `upper surface surrounding a bearing- ZI
l `for a king pin.. Outer side-bearing surfaces _such
as 22 are also provided on the bolster to contact
corresponding surfaces on the .car vbody >during
tilting movement. AThe entireweight. of the car
is normally carried on the center plate and trans
mittedthrough 'the bolsterilZ and hangerv links
I3, I4 to the side _frames I0.
,
?
,
,
l _
For transmitting the load from the side frames
in section.
.
.
.
_to the ,track through?the usual car wheels such
Fig. 8 is a cross-sectional view taken ?on'line 40 as 243 mounted on an axle `214 having end journals
8_8 ofFig. '7.
~
'
.
� ,
25, and at the _Sametime holding the side frames
Fig. 9 is a detail View showing a stillfurther
in properly spaced relation, and cushioning the
modification of the invention, parts being broken
load upon said wheels, brackets 26, 21 are pro
vided on. each side .frame fore .and aft of the
away and parts shown in section.
�
.
Fig. 10 is a detail view showing another modi
馽ation of- the invention. parts being broken away
l. and parts shown in section.
Y ,
Fig. 11 is a side elevation of a further modifica
tion of the invention.
`
?
Fig. 12 is a plan viewV thereof, partly broken
away and partly in section.
1
.
bolster guide brackets II. These brackets 26, 21
have horizontallydisposed through bores 28 ter
minating at. their innermost margins in out
wardly extending flangesZS, the bores 28 of
ybrackets of.' the ?opposite side frames being >in
alignment ,on axes perpendicular to the side
frames. Rotatably mounted in each opposite pair
oibores 2B is the outer cylindrical shell orjhous
Referring to the drawings, and firstto the em
縝odirnent illustrated in Figs.> 1 to 4 thereof, the
ing 3Q, 30', o_f atorsion bushing member `having
.numeral IQ designates one of a pair of truck side
lspacing .�langes鋖 secured .thereto as by Welding.
frames, one side only of the truck beingl shownin
55 .The
flanges .3| arey secured tolthe flangesv 29,
2,408,520
3
which they engage face to face, by removable
bolts 33 arranged in a circle about the flanges.
rl?he arrangement is such that the shells 30, which
are of considerable diameter, act as cross-frame
members to hold the side frames in spaced-apart
relation and may be rotated for adjustment as
hereinafter described by removing the bolts 33
and turning the shells to a new position, the bolts
being equally spaced about the flanges for match
ing the flanges in a plurality of positions.
y
Extending through the bore of each shell 30, 35?
4
this purpose the side frames IG may be provided
with vertically disposed pedestals 6B, 6I, the
pedestal 60 being disposed at one side of the arm
40 more remote from shaft 35 than the journal
box 45 and the pedestal 6| being disposed at the
other side of the arm 40 less remote from shaft
35 than. the journal box and closely flanking the
enlarged portion of the arm 40 enclosing the jour
nal box.
A strap 62 is attached to and across the
lower ends of the depending pedestals to enclose
the enlarged portion of arm 44 籥nd limit its move
ment while bracing the pedestals from each other.
For holding the shells 3G, 39' against rotation
in addition to the bolted flanges 3|, 3|', and to
other rubber-like material adapted to resist rela
tive rotation of the shell and its shaft by tor 15 hold adjustment of torsion on the resilient bush
ings when -the bolts 33 are removed, and .to pro
sional deflection. The rubber bushing is bonded
vide adjusting means, the shells 39, 30? are pro
to the outer shell 30 and to the shaft 35 and ex
vided with depending arms 13, 10? fixed thereto
tends the length of the shell, the shaft being of
and having aligned openings at their lower ends
greater length so as to ext/end beyond the bushing
through which a draw rod 1| extends, Nuts 12,
and the shell at each end thereof. Each end of
12? arethreaded on the ends of the rod beyond
the shaft 35, which is preferably hollow, has an
the arms. The arrangement is such that when
outer end surface portion 35X serrated to adjust
is a longer shaft 35, 35? of smaller diameter en
closed by a bushing 3S, 35' of resilient rubber or
the nuts are drawn up against the arms 10, 10?
ably engage a :torsion arm, such as the arms 48,
the shear load on the bolts 33 is relieved and
40'. Each torsion arm has an internally serrated
hub 4| split at one side, as at 42 and provided 25 these may be removed and replaced, or by draw
ing the nuts up further, the shells may be rotated
with a clamp bolt 43 for clamping it to the shaft
to the next bolt position thereby increasing .the
in an adjusted position. Each torsion arm nor
.torsional loading, or backed off to relieve the tor
mally extends substantially horizontally, and, at
sional loading.
a distance from the shaft 35, is formed with a
To provide uniform braking of the wheels sub
cross passage 44 for engaging about a journal 30
stantially independent of the amount of deflection
box 45, which in turn 'engages about a journal 25
of the wheel supporting arms 40, 40', the brake
of a wheel axle. The arrangement is such that
controlling mechanism is mounted entirely on the
.parallel torsion arms fixed to opposite ends of
arms. For this purpose a cross-rod 80 has its
the same shaft 35 engage opposite journals of the
same wheel axle 24 and transmit a portion of 35 ends secured to the outer ends of arms 40 at oppo
site sides of the truck, and a brake beam 8|, con
the load from the side frames through the torsion
necting arpair of brake shoes 82, one for engag
bushing 3B to the wheels 23 0f a single axle 24,
the second shaft 35? .transmitting the remainder
ing each wheel 23, is suspended therefrom by
through the torsion bushings and being cushioned
thereby.
For providing for limited vertical movement of
brake-beam 85, having brake shoes 86 at its ends,
is suspended from studs 84 by links 81, the ar
rangement being such that brake blocks 82 and
links 83. Each torsion arm 40 is provided with
of the load in similar manner .to the wheels of
axle 24', and the entire vertical load on the truck 40 an ear 89. Studs, such as 84 on the same pair of
arms 40 are 駒ed to ears 89 thereon and a second
being transmitted to the four wheels thereof
the wheels of one axle with relation to each other,
journal boxes 45 are preferably made smaller than
the through 玱penings 44 of the torsion arms and
are spaced from the vertical walls of said open
Aings by resilient blocks 55, 5|, of soft vulcanized
rubber or other rubber-like material bonded by
vulcanization or otherwise secured to the vertical
86 engage the same wheel at approximately di
ametrically opposite positions.
A cross-rod 83 has its ends rotatably secured
in the ears 89 of opposite torsion arms and has a
lever arm 88a 駒ed thereto. A lever 98 is ful
crumed at 9| on the lever arm with its opposite
end pivotally connected at 92 to a link 93. The
other end of link 93 is pivotally connected at 94
to one end of a lever 95, the opposite end of which
passages 44 facing them. These blocks support
is pivotally connected to a brake rod 91 at 95.
the load between the torsion arm 4|) and the
journal 25 by shear stress of the resilient ma 55 Lever 95 is pivotally connected to brake beam 8|,
as at |00, between its ends, and brake-beam 85
terial and permit such vertical movement as is
is pivotally connected to lever 90 between .the
provided. above 4and below the journal box by the
ends of the lever. The brake rod 91 may be con
space between the box and the horizontal walls
nected to any suitable operating mechanism (not
of the through passage 44. With this construc
tion a single springing unit in the form of the 60 shown) such as the piston rod of a fluid pressure
cylinder. The arrangement is such that when
torsion bushing extending transversely of the
the rod 91 is moved to the right in Figs. l and 2,
truck transmits the entire load between two
the brake shoes 82 and 86 are pressed against the
wheels on the same axle and the body of the
wheel. The pivot points 80 and 84 are so ar
vehicle while the shear cushion mountings at the
ranged that the brake shoes normally hang clear
journal boxes compensate for slight differences in
of the Wheel. As the brake control mechanism
the level of the rails or other forces遲ending to
is carried by the torsion arms, vertical move
lift one wheel higher than the other. While a
ments of the torsion arms have substantially no
live axle running in journal boxes has been
effect upon operation of the brakes and do not
shown, the axle may be fixed in the journal boxes
affect their adjustment.
and the wheels be mounted for rotation about the
Referring to Figs. 5 and 6 of the drawings, in
axle if desired.
?this moriinoation of the invention ino shaft izo
While the chief purpose of the side frames is` to
is identical in construction to the shaft 35 of
transmit the load from the bolster to the shafts,
Fig. 1 and is employed for the same purpose. The
the frames may also be employed for guiding and
restraining movements of the torsion arms. For 75 torsion bushing |2| of vulcanized rubber or other
faces of the journal boxe's45 and the through
2,408,520
5
6
rubber-like material extends substantially from
plates. The endsof shaft |64 are squared be
yond the locking collars, as at |10 for receiving
one serrated'end of the shaftto the other and
is bonded to the shaft by 'vulcanization The
outer housing or shell, however, is comprisedV of
semi-cylindrical housing members |22, |23 hav
ing radially turned flanges |24 adapted to extend
a Wrench to turn the shaft or hold it while mak
ing adjustments. '
CW.
face to face. These flanges are perforated to re
ceive bolts or rivets |25'for securing the housing
Extending about the shaft |64 in spaced rela
tion thereto between the bearing plates, is a hous
ing or shell | 1| which may be of two semi-cir
cular sections, as shown.
A resilient torsion
members together. The flanges extend through
bushing |12 of vulcanized rubber or other rubber
out a central?portion'of the housing but are 10 like material is bonded to the shaft I 64 and
preferably to the housing |1| and extends there
omitted near the ends to provide unilanged cylin
drical bearing portions |26, |21 to bear in the
between from one bearing plate to the other to
provide a torsional spring member. Torsion arms
bores 28 of side frame brackets 26, 21, and to
receive flanges |28, |29, corresponding to the
|15, |16 are fixed to the housing at opposite ends
flanges 3|, 3|' of Fig. 2, and collars |30, | 3| hav 15 thereof and take the place of the arms 40 of Fig.
ing arms |33, corresponding to arms 10, 10? of
1. These arms enclose journal boxes in the same
Fig. 1.
manner as the arms 40 of Fig. 1, and there rotat
ably support the axle |11 to which the wheels |18
The rubber torsion bushing | 2| may be bonded
as by vulcaniz-ation to the housing members or
are fixed. The arrangement is such that de
not, but is preferably so bonded. In any event 20 Flection of the arms |15, |16 under loading con
the bushing is so constructed as to be subjected
ditions rotates housing |1| about shaft |64
which is locked to the frame, thereby distorting
to radial compression when the housing members
the resilient bushing |12. Initial tension of the
are secured to each other about it. Where the
bushing may be adjusted by locking the shaft |64
rubber is not first bonded to the housing, the
radial compression is depended upon to hold the
against rotation, by use of a wrench, removing
bushing frictionally from turning with relation to
bolts |60, rotating the shaft |64 by use of the
wrench to the desired position and then replacing
the housing. The flanges |28, |29, and the col
the bolts |69. The bolts |69 are arranged in a
lars |30, |3| may be welded or otherwise secured
circle and adjustments of less than the angle
about the assembled housing.
The torsion arm |35 corresponds to the arms 30 between bolt holes may be made by shifting the
locking collars on the serrated ends of the shaft.
40 of Fig. 1. Due to the fact that a pair of arms
are connected to the shaft I 20 so that the wheels
are deflected as a pair, this construction may be
used in place of the torsion suspension shown in
Fig. 1 on a truck of the type there disclosed.
In the modification of Fig. 10. the shaft |80 is
identical with the shaft |64 of Fig. 9 and is
mounted on the frame members in the same man
ner. About the central portion of the shaft, how
ever, are two housing membersJSi, |02 in spaced
The modification shown in Fig. '1 is also adapted
to replace the torsion bushing suspension of Figs.
apartrelation each separated from the shaft by
a torsion bushing, |83, |84, respectively. The
1 and 2. In this form of the invention the hous
ing or shell |40 is identical with'the shell 30 of
torsion arms |85, |86 which are identical vwith
Fig. 2 and hasflanges |4|, |42 secured thereto 40 arms |15, |16 of Fig. 9, and vengage the wheel
axle in the same manner, are fixed respectively
identical with ilanges 3|, 3|? and also bands |43,
to the housing members |8|, |82.
|44 secured theretofor providing locking arms
In the form of the invention shown in Figs.
identical with the bands |30, | 3| of Fig. 5. In
11 and 12 the load is supported on a bolster from
the side frames as in Fig. 1. The numeral 200
designates one of the side frames which are simi
lar to the side frames shown in Fig. l. The load
is transmitted to the axles from the side frames
by torsion arms 20|, 202 secured to the ends of
place, however, 'of a continuous shaft, a pair of
separate shafts |?45,"|46 are located in opposite
ends of the housing, and separate bushings |41,
| 480i vulcanized rubberror other resilient rubber
like `material are provided about the respective
shafts within the housing and bonded by vulcani
zation tothe shafts and preferably to the hous
ing.
Torsion arms
|49, _ |50, are adjustably
clamped to the serrated extending'ends of the
shafts and support opposite ends of a wheel axle.
50
parallel shafts 203, 204 which extend through
adjustably rotatable shells or housings 205, 206
fixed to the side frames. Resilient bushings 201,
The arms |49, |50 are formed with a cross pas
208 of vulcanized rubber or other rubber-like
material are bonded to the shafts 203, 204 re
sage, such as |5| providing a clearance opening i
spectively, which they partially enclose, and to
the housings 205, 206 through whichthey re
spectively extend. The housings are rotatively
is journaled. A resilient bushing |53 surrounds
adjustable with respect to the side frames as in
the journal boxe-nd 'is bonded to the arm |48
the embodiment 0f Fig. l, and have arms 25|,
and the box |52.
, Y
.
YIn the form of the invention illustrated in Fig. 60 252 駒ed thereto and an adjusting rod 209 ex
tending therebetween as in the embodiment of
9, bearing plates |60, I6! are secured to* side
for receiving a journal box |52 in which the axle
frames |62, |63, and have aligned bores for re
ceiving a shaft |64 which extends therethrough
Fig. l. The axles 2|0, 2H may be rotatably
journaled in the arms 20|,�2 or may be jour
naled in bushings as in Fig. 8 or in floating jour
and is adjustably rotatable therein. rPhe ends
of the shaft are serrated or splined, as at |65, |66 65 nal boxes supported from the arms by rubber
beyond 'the bearing plates.
`
correspondingly serrated locking collars |61,
|68 are slidably mounted on the serrated ends of
shear mountings as shown in Fig. 1.
~
` The brake controlling mechanism is suspended
entirely from the arms 20|, 202 and the housings
205, 206 in such manner as to provide a minimum
the shaft and have flanges which are adjustably
secured to the bearing plates against rotation by 70 alteration-of brake adjustment with deflection of
bolts |69. The arrangement is Vsuch that the
? arms 20|, 202 or with rotational adjustment of. w
housings 205, 206. For this purpose brake shoes
shaft may be rotated with respect to the frame
265, 2|6 are mounted on brake-beams 222, 223
vby removing bolts |69, removing-collars |61, |68,
at opposite sides vof wheel 2|1 suspended from
Y returning them*r in an angularlyl advanced posi
arms 20|,'and brake shoes 2|8, 2|9 are similarly
tion vand then� securing them to> the bearing
2,408,593@
8
arranged at wheel 220 on arms 202. A lever 22H
is fulcrumed on the brake-beam 223 and one end
thereof is pivotally connected to arm 2Q! while
its opposite lower end is pivotally connected to
a link 225.
A lever 22S is fulcrumed on brake
beazn 222 and its lower end is pivotally connected
to the link 22d while its upper end is pivotally
connected to a link 227i. An arm 223 is fixed to
shaft, said bushing being fixed to said housing
and said shaft for torsional 馿xing, a rail wheel,
and an arm adjustably 駒ed to said shaft and
having a journal box for engaging the axle of
said wheel, said journal box being mounted in
said arm for limited movement with respect
thereto.
3. A truck for a rail vehicle comprising a bolster
for supporting the body of a vehicle, a frame
the housing 265. A lever 229 is pivoted at the
end of the arm 223 and extends vertically. The l 0 structure from which said bolster is suspended,
lower end of lever 2?128 is pivotally connected to
the upper end of lever 225 by the link 221. A
a tubular housing adjustably 駒ed to said frame
structure and extending laterally of the truck
second arm 2.30 is fixed to housing 205 and a
lever 235 is fulcrumed thereon. One end. of the
lever Esi which extends horizontally is connected
to the upper end of lever 22S by a link 23g, and
the other end is pivotally connected to a link 233.
from side to side thereof and constituting a cross
At the other axle of the truck, brake shoes 2 i6,
2id are similarly supported from arm 261i by
links and are adapted to be operated by levers
2id, Zlll fulcrumedon the brake beams. These
levers have their lower ends pivotally connected
and said Shaft for torsional flexing, a rail wheel,
by a link
deflected by shear loading.
to each other.
The upper end of
lever
arm 25,5
'istisisfixed
pivotally
to housing
secured
gli@ toand
arm
has232.
a Verti
cally disposed lever 246 fulcrumed thereon. The
lower end of 'lever 2&5 is pivotally connected to
the upper end of lever Ztl! y a link Elli'. The
upper end of lever 2st is connected by a link 'f2-籰il
to an equalizer lbar 24E, the other end of which
is connected to link 23d. The center of the
equalizer bar is pivotally connected to a brake
operating rod 255. The arrangement is such that
movement of the rod 25a to the right in Figs. 1l
and l2 applies all the brakes to the wheels simul
taneously. The fulcrum points of levers 22?! and
24S are arranged'at the same radius from. the
center lines of shafts 263, Zilli respectively, as
the pivot points o1" the nearest ends of links 2H,
241, so that at any delle/:tion of arms 2M, 292 ,_
under loading, little if any movement of the
brakes with relation to the wheels will occur,
frame member of said frame structure, a shaft
extending axially within said housing, a resilient
torsion bushing between said housing and said
shaft, said bushing being nxed to said housing
and an arm adjustably fixed to said shaft and
having a journal box for engaging the axle of
said wheel, said journal box being separated from
said arm by a resilient mounting adapted to be
4. A truck for a rail vehicle comprising a bolster
for supporting the body of a vehicle, a frame
structure comprising a pair of laterally spaced
side frame members from which said bolster is
suspended, a pair of tubular housings extending
from one side frame to the other and adjustably
secured thereto, said housings comprising means
for spacing said side frames from each other, a
shaft extending axially within one of said hous
ings, a resilient torsion bushing between said
housing and said shaft, said bushing being 駒ed
to said housing and said shaft for torsional flex
ing, a rail wheel, and an arm fixed to said shaft
and having a journal box for engaging an axle of
said wheel.
5. A truck for a rail vehicle comprising a bolster
for supporting the body of a vehicle, a frame
structure comprising a pair of laterally spaced
side frame members from which said bolster is
and rotational adjustment of housings 2%5, 206
will also have only small e馽ct upon brake ad
suspended, a pair of tubular housings extending
justment.
secured thereto, said housings comprising sub
In any of the embodiments of the invention
the entire vertical load is carried by the resilient
bushings in torsional shear and metallic springs
are avoided.
Variations may be made without departing r
from the scope of the invention as it is defined
from one side frame to the other and adjustably
stantially the entire means for spacing said side
frames from each other and bracing the same,
a shaft extending axial'y within one of said hous
ings, a resilient torsion bushing between said
housing and said shaft, said bushing being fixed
to said housing andsaid shaft for torsional flex
ing, a rail wheel, and an arm 駒ed to said shaft
and having a journal box for engaging an axle of
said wheel, said arm being adjacent one of said
l. A truck :for a rail vehicle comprising e.
bolster for supporting the body of a vehicle, a 55 side frames, and the adjacent side frame having
means for guiding said arm.
.
frame structure from which said bolster is sus
6. A truck for1 a rail vehicle comprising a bolster
pended, a tubular housing adjustably iixed to
for supporting the body of a vehicle, a frame
said frame structure and extending laterally of
by the following claims.
I claim:
structure comprising a pair of laterally spaced
the truck from side to side thereof to constitute
a frame member, a shaft extending axially with 60 side frame members from which said bolster is
suspended, a pair of tubular housings extending
in said lio-using, a resilient torsion bushing bc
vfrom one side frame to the other and adjustably
tween said housing and said shaft, said bushing
secured thereto, said housings comprising means
being fixed to said housing and said shaft for
for spacing said side frames from each other,
torsional flexing, a rail wheel, and an arm adjust�.
65 resilient torsion bushings secured within each end
ably
for engaging
ilxecl to said
the shaft
axle and
of said
having
wheel.
a journal
of each housing, a shaft secured within one of
said bushings and extending axially of said hous
2. A truck for a rail vehicle comprising a bolster
ing, a rail wheel having an axle, and an arm se
for supporting the body of a vehicle, a frame
cured to a projecting end of said shaft, said arm
structure from which said bolster is suspended,
a tubular housing adjustably fixed to said frame 70 having means for engaging the axle of said wheel
to transmit the vehicle load to said wheel from
n structure and extending laterally of the truck
said bolster.
from side to side thereof and constituting a 4cross
',7. A truck for a rail vehicle, said truck com
frame member of said frame structure, a shaft
prising a rail wheel, a frame structure, and a tor
extending axially within said housing, a resilient
torsion bushing between said housing and said 75 Sion spring structure for transmitting load _from
' 2,408,520
~
10
said frame structure to said wheel, said torsion
spring structure comprising a tubular rotatably
adjustable housing nonrotatably secured to said
frame structure and extending from side to side
thereof and constituting a principal cross-frame
member of said frame structure, a shaft member
extending axially of and Within said housing, and
stress on said material, and a bolster structure
swung in the frame between said tubular frame
members.
9. A truck for a rail Vehicle, said truck com
prising an axle'having rail wheels secured there
to, a frame structure, and a torsion spring struc
ture vconstituting the sole means for transmitting
the load from said frame structure to said axle,
said torsionA spring structure ycomprising a tubular
a body of resilient rubber-like material Within
籹aid housing about said shaft and mounted to
sustain said load by torsional stress of said ma 10 rotatably adjustable housing nonrotatably se
cured to said frame structure and extending from
terial.
side to side thereof and constituting a principal
8. A truck for a rail vehicle lcomprising rail
cross-frame member of said frame structure, a
wheels, a pair of side frame members, a pair of
shaft extending axially of and within said hous
tubular frame members spaced-apart fore and
aft of the truck and extending from a side frame 15 ing, _a body of resilient rubber-like material with
in said housing about said shaft and mounted to
member to the other and secured to both,
sustain said load by torsional stress of said ma
shafts in said tubular frame members, arm struc
tures connecting said shafts with said wheels,
terial, and an arm secured to an end of said shaft
and provided with means for retaining said axle.
bodies of resilient rubber-like material mounted
between said shafts and said tubular frame mem 20
ALVIN S. KROTZ.
bers for resisting Wheel deflection by torsional
Документ
Категория
Без категории
Просмотров
0
Размер файла
945 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа