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Патент USA US2126668

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Aug. 9, 1938.
? J. P. RUTH
sLIPPER BEARING
Filed May 11, 1935
'
2,126,668
2,126,668
Patented Aug. 9, 1938
UNITED STATES PATENT OFFICE
2,126,668
`
SLIPPER BEARING
Joseph P. Ruth, Denver, Colo. '
Application May 11, 1935, Serial No, 21,018
10 Claims. (Cl. MI5-�)
This invention relates to improvements in slip
panying drawing in which the preferred embodi
per bearings, and more particularly to such bear
ings as employed in railway locomotives, cars, and
the like.
In railway locomotive and car construction it is
customary to support the frame of the unit on
springs that are connected by means of equaliz
ment of the invention has been illustrated, and in
which:
ing levers, which, in turn, rest on the axle bear
ing. In order to prevent undue strains the equal
izing levers are supported on arcuate bearing sur
faces that permit the levers to rock to a limited
extent.
Whererailway units travel over tracks that are
quite crooked, as is often the case in narrow
gauge tracks constructed in mountainous coun
tries, the axles must be so connected with the
Fig. 1 is a side elevation, partly in section, of
the side of a railway truck showing the position
of the slipper bearings;
Fig. 2 is a section taken on line 2_2, Fig. 1; and
Fig. 3 is a section taken on line 3-� Fig. 2.
In the drawing reference numeral 4 indicates
the axle of a railway car truck to the ends of 10
which the wheels 5 are connected. The wheels
are of usual construction and form no part of this
invention and have therefore been shown in a di
agrammatic manner. The axles are mounted for
rotation in an axle housing which has been desig 16
nated by reference numeral 6. This axle hous
movement transversely of the car so as to adapt
ing is also of the usual construction and is pro
vided at each end with a substantially rectangu
themselves to the curvature ofthe track.
It is the object of this invention to produce a
tween the guides 8. The lower ends of the guides .
rigid frame that they will have considerable
lar portion l that is located for reciprocation be
slipper bearing that shall be especially well adapt
are connected by a frame member 9, while the
ed for use with railway units that travel over
upper ends thereof are attached to or connected
with a frame member I0. The weight of the car
crooked and uneven railway tracks and which, in
addition to the usual rocking movement, shall
also be so constructed that the parts can slide
relative to the axle housing so as to permit the
wheels to properly adjust themselves to the rails
without imposing undue strains on the bearings.
This invention, briefly described, comprises a
30 bottom block that is adapted to� rest on the upper
surface of an axle housing and which has its top
provided with a concave cylindrical surface hav
ing an axis of curvature extending in the direc~
tion of the length of the axle housing.
Supported on the bottom block is a second
35
block having an under surface formed from a
convex cylindrical surface of the same curvature
as that of the concave surface in the bottom
block. The upper surface of the second block is
provided with a concave cylindrical surface the
axis whereof is perpendicular to the axis of the
convex under surface. The spring supporting and
equalizing levers, which are usually bowed, are
provided on their under surfaces with down
' wardly extending projections having lower ends
formed with convex cylindrical surfaces that fit
the concave cylindrical surfaces in the tops of the
second blocks. This construction permits the sec
body and its load rest on the frame member I0
and the latter is provided at spaced intervals
with downwardly-extending posts I I that rest on
the springs I2, The ends of the springs are con
nected by means of stirrups I3 with the ends of
spring supporting and equalizing levers I4. The
levers I4 are preferably bowed and positioned with
their convex sides~ upwardly. The upper surface
of each lever is provided with a recess I5 like
that shown in Fig. 2 and these recesses serve to
receive the frame members Ill. Each of the spring
supporting levers is provided on its lower side with
a downwardly-extending projection I6 terminat
ing in a convex cylindrical surface Il. Resting
on the top of the rectangular portion 'I at each
end of the axle housing is a bottom supporting
Ablock I8. The top of this block is provided with 40
a concave cylindrical surface I9 having an axis
of curvature extending in the direction of the
length of the axle housing. The bottom support
ing block has its base portion extended outward
ly a short distance, as designated by reference
numeral 20, and extended upwardly from the por
tion 20 are vertical walls 2l that form with the
portion 20 and thesides of the block .a rectangular
ond block to rock on the bottom block and also
slide in respect thereto and at the same time
channel for the reception of oil or grease. Sup
ported on the bottom block is a second block 50
permits the spring supporting levers to rock and
slide with respect to the second block.
Having thus briefly described the invention, the
which has been designated by reference numeral
22 and which has an under portion formed by a
cylindrical surface of the same curvature asA the
concave cylindrical surface ,in the bottom block
I8. The_top of the second block is provided with 55
same will now be described in detail, and for
this purpose reference will be had to the accom
2
2,126,668
.a concave cylindrical surface 23 having an axis of
curvature perpendicular to the axis of curvature
of the convex bottom surface. The radius of
curvature of the concave cylindrical surface in the
top of block 22 is the same as that of the convex
concaved seat, a weight-supporting shoe formed
cylindrical surface I1 at the lower end of the
projection I6. A cover 24 is applied to the walls
2I and is provided at its center with an opening
surrounded by the vertical wall 25. The spring
supporting levers are provided with downwardly
terposed in freely floating, self-positioning rela
angularly movable cooperation with said seat and
extending flanges 26 that surround the projec
tions I6 and the vertical wall 25.
cylindrically concaved seat, a weight-supporting
with a cylindrically convexed bearing surface de
pending for operative association with said seat,
the cylindrical axes of said seat and shoe being
perpendicularly related, and a bearing block in Ul
tion between and contoured for both linearly and
shoe.
3. In a truck, a slipper bearing comprising a
shoe formed with a cylindrically convexed bear
When the parts above described are assembled, , ing surface depending for operative association
they form an assemly like that shown in Fig. 1
and in greater detail in Figs. 2 and 3.
It will be apparent that since the frame is
rigid and since it is necessary in going around
steep curves for the wheels to move transversely
with respect to the frame, the bottom block I8
that is secured to the .axle housing will move with
respect to the block 22 and this motion is per
mitted by the two cylindrical bearing surfaces
freely 駉ating, self-positioning relation between
and contoured for both linearly and angularly
movable cooperation with said seat and shoe,
wheeled means supporting said seat, and a frame
resiliently carried by said shoe.
4. A slipper bearing comprising a seat formed 20
with an upwardly-opening, cylindrically-con
caved bearing. zone, a weight-supporting shoe
having axes of curvature extending in the direc
formed with a cylindrically convexed bearing sur
tion of the length of the axle housing. If lone
vaxle moves vertically with respect to the adjacent
face depending in spaced, axially-perpendicular
axle, this produces a rocking action of the spring
supporting and equalizing levers I4. Since these
levers rest on the second block 22, this rocking
action will cause the block 22 to rock with re
30 spect to the block 'I8 about the axis of the cylin
drical bearing surfaces. If one side of the truck
moves downwardly or upwardly with respect to
the other side, this willrproduce a rocking motion
between the surfaces I?I and 23.
It will be seen from the above that when rail
way units are provided with slipper bearings like
those illustrated on the drawing and described
herein, the .axle housings can move freely with re
spect to the frame without producing any severe
40 strains because the universal movement pro
vided by the slipper bearing described permits
any and all adjustments to be automatically ef
fected without strain.
Particular attention 'is called to the fact that
relation with the bearing zone of said seat, a 25
bearing block interposed in freely floating, self
positioning relation between and cooperatively
associating said seat and shoe, and cylindrically
contoured areas on said bearing block for linearly
and ,angularly movable bearing cooperation with 30
-the contoured surfaces of and for retention of
said block between said seat and shoe.
5. A slipper bearing comprising a seat formed
with an upwardly-opening,
cylindrically-con
caved bearing zone, a bearing block formed with
a cylindrical under portion freely 駉ating within
and cooperating for relative linear and angular
motion with the bearing zone of said seat, a cylin
drically-concaved bearing Zone formed on said
block in vertically-spaced, axially-perpendicular 40
relation with the bearing zone of said seat, and
a weight-supporting shoe depending to a cylin
drically-convexed bearing surface seated in float~
ing relation in and cooperating for relative linear
Ithe .axle housing can move transversely with re
an angular motion with the bearing zone of
spect to the frame due to the?sliding action per
mitted -between the two cylindrical surfaces on
the bottom blockand block 22.
Attention is also directed to the fact that the
cylindrical surfaces 籌?I can -slide with respect to
the block 22 and also 'rock with respect thereto,
and in this way- practically every -conceivable ad
justment can take place without producing severe
strains on any part. By filling the chamber be
tween the walls >2I with oil or grease, the parts
will always remain properly lubricated and the
said block, whereby said block is mounted to float
in self-positioning relation and for accommoda
tion of relative displacement between said seat
flange -2li and wall 25 serve as means to prevent
dust and dirt from entering the chamber where
60
with said seat, a bearing block interposed in
`and shoe.
6. In a truck, a slipper bearing comprising a Y.
seat 'formed with an upwardly-opening, cylin
dricallyeconcaved bearing zone, wheeled means
supporting said seat, a bearing block formed with
a cylindrical under portion engaging within and
cooperating for relative linear and angular mo
tion with the bearing Zone of said seat, a cylin
drically-concaved bearing zone formed on said
block in vertically-spaced, axially-perpendicular
the bearings are located.
?relation with the bearing Zone of said seat, a
It is, of course, possible to turn the several
cylindrical bearing surfaces through an angle of
ninety degrees and get approximately the same
weight-supporting shoe depending to a cylindri
cally-convexed bearing surface seated in and co
operating for relative linear and angular motion
with the bearing zone of said block, and a frame
resiliently associated with said shoe.
effects and such a construction is considered to be
a mechanical equivalent- of the one illustrated,
65 described and claimed.
I claim .as my invention
1. A slipper bearing comprising a cylindrically
7. The combination with a wheeled support and
a rigid frame carried by and for limited motion
relative to said wheeled support, of va slipper bear
concaved seat, a Weight-supporting shoe formed
ing operatively associating said frame and
with a cylindrically convexed bearing surface de
70 pending for operative association lwithA said seat,
and> a' bearing block interposed inv freely iloatin'g,
self-positioning relation between and contoured
for b'oth'linearly and ?angularly movable coop
eration 'with said seat and shoe.
2. A slipper bearing comprising a. cylindrically
wheeled support, said bearing comprising a seat
-in~fixed`relation with said wheeled support, a c
bearing block engaging and cooperating for rela
tive linear and angular motion with said seat, a
weight-supporting shoe engaging and cooperating
with' said -block for relative linear and angular
lmotion in paths perpendicular to those of the
2,126,668
3
resiliently interconnecting said shoe and rigid
relative shiftable telescoping relation with said
upstanding flange to complete an enclosure for
frame; together with guide means operatively en
said bearing assembly.
travel between said seat and block, and means
gag韓g between said wheeled support and rigid
l0. In a slipper bearing having a 駒ed bearing
frame.
8. A slip-per bearing comprising a seat, a bear
ing block engaging and cooperating for relative
linear and angular motion with said seat, a
seat, a bearing block shiftably cooperating with
weight-supporting shoe engaging and cooperat
said seat and a weight-supporting shoe shiftably
engaging said block, a base in fixed relation with
and extending marginally beyond said seat, a
wall rising from margins of said base in sur
rounding relation with the bearing assembly to
ing with said block for relative linear and angu
lar motion in paths perpendicular to those of the
travel between said seat and block, and housing
elements in fixed relation with said seat and shoe,
sembly, said reservoir wall terminating in an up-`
respectively, cooperating in relatively shiftable
relation to enclose said bearing assembly.
bearing block and shoe, whereby the shiftable
surfaces of said bearing assembly may be fully
submerged in lubricant retained in said reservoir,
9. A slipper bearing comprising a seat, a bear
ing block engaging and cooperating for relative
linear and angular motion with said seat, a
weight-supporting shoe engaging and cooperating
with said block for relative linear and angular
motion in paths perpendicular to those of the
travel between said seat and block, a housing ele
ment in fixed relation with and surrounding said
seat and formed with an upstanding flange sur
rounding and spaced from said shoe, and a hous~
ing element in fixed relation with said shoe and
formed with a depending flange cooperating in
define a lubricant reservoir enclosing said as
per plane above the contact Zone between said
a removable cover for said reservoir formed with
an opening arranged to shiftably receive said shoe,
an upstanding marginal flange de駈ing said
opening, and a closure element flxedly carried 4
by said shoe and formed with a depending flange
cooperating in relatively shiftable telescoping re
lation with said upstanding flange to close said
reservoir against entrance of foreign matter
therein.
JOSEPH P. RUTH.
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