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Патент USA US2404115

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July 16, 1946.
Filed May 22, 1944
4 lSheets--Shee’tl 1
July`16, 1946.
2,404,1 l5
Filed May 22, 1944
4 Sheets-Sheet 2
July 16, 1946.
Filed May 22, 1944
4 sheets-sheet 3
BY 7444,?56@ .W
July 16, 1'946.
Filed May 22, 1944
4 sheets-sheet 4y
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Patented July 16, 1946
te Clark Equipment Company, Buchanan,
Mich-_, a corporation of Michigan
Application May. 22, 1944, serialy No. 536,849
1l Claims.
(Cl. 10,5?131)
This; invention relates` to, axleV generatorI drives',
and isv more «particularly concerned with the ar
rangement and mounting of a, drive mechanism
on the‘axle-V of“ a; rail vehicle for drivingua genera
toncarriedf byI the vehicle; body.
Numerousattempts- haveßbeen made to provide
sides in the provision. of; a construction which
will, be capable of. installation on existing equip:
ment, and also designed for ready maintenance.,
inspection andL repair»
Other ehiectsV and advantages` of the present
invention will appear more fully from the» fol?>
lowing detailed description which, taken in: Genf
such drivesin the past, some of which contem
junction with theA accompanying drawings, will*
plate the use of'a pulley on‘the- axle drive through
disclose to those skilled in the art the particular
afbeltl to a generator- shaft, and' others involving
10 construction, and operation of a preferred form
the use of' gearing;
of the present invention.
It appears that one of the primary problems
In the drawings:
involved in theprovision offsuch a drive is: toin
Figure 1A is a transverse sectional view through
stalliv a` mechanism on the axle shaft Wit-houtre
an axle having a generator drive mechanism
uuiringJ anychange in thezshaft- itself and: yetnot
introducing- into the shaft any undue1 stresses 15 mounted thereon;
Figure 1B is a continuation of the structure
that nfiigflífit.` reduce, the life ofl the shaft orA hasten
failure- of the shaft through erosion., overstressing
shown in Figure 1A;
As a result, it
Figure 2 is a detail sectional view showing a
has been consideredv impractical to weld, bolt or
modified arrangement for connecting the axle
of' localized points: or the: like.
otherwisey securei‘a gear' tothe shaft, as the con 20 drive gear to the shaft;
Figure 3u is a sectional view taken substantially
nection mustl be» sufficiently floating to accom
on line 3--~.3 of Figure 1B;
modate» the torque: react-ions between the shaft
Figure 4 is a diagrammatic view showing the
and‘ the generator. Also, the design must-be `suc-h
construction of gear housing;
that it> will accommodate itself tc- existing axle»
Figure 5 is a sectional' View through the Wheel
constructitms> novvfÍ iin usey on» rail vehicles, while
hub showing a modified clamping arrangement;
yet providing for centering yof the- gear with re-`
and Figure 6 is a sectional view taken'on line
spect to the axis of the rotation of the shaft and
acceenmod‘ating4 the circumferential torque dis
turbances produ-ecdl by the: reactions bet-Ween the
car body and the car- truck.
The present invention has for its primary» ob
ject' Ythe provision of> an axle shaft dri-ve for gen
craters in which the drive is provided hy> a loevel»l
gear mounted’v for conjoint rotation with the shaft
and driving a pin-ion which in turn, through a la @n»
suitable propeller shaft, is adapted to drive a gen
erator supported preferablyv on the under side of
the car floor. In ordery to absorb reactions the
gear must be so mounted as notA to interfere with
normal flexing ofthe axle shaft and not to impose
any stresses thereon for` which the shaft has not
been» designed. In addition, a rotatable mounting
must. be provided within the housing which en
closes the gear, this housing in turn being suitably
supported through torque reaction members to
provide proper gear action in the event of rela
tive movement between the car truck and the ear
body. ‘
Still another feature of the present invention is
to provide a reaction cushioning means between
the gear mounted for conjoint rotation with the
axle and, the axle shaft, while yet providing
for positive drive thereto during the normal cn-l
eration of the vehicle. ,.
5-6 of Figure 5.
Considering now the construction shown in
Figures 1A and 1B, there is provided an axle
shaft 5 of conventional desig-n such as that now
used in rail vehicles of the freight or lpassenger
type. This shaft has a tapered portion 6 leading
to a substantially straight central portion 1, the
tapering of the shaft being for the purpose of ac
commodating flexing of the shaft under load, the
design of the taper and the length thereof being
accurately determined for the type of car which
is mounted on the truck. rl’he shaft 5 is adapted
to have mounted thereon a flanged car Wheel/8
having the tread portion 9 engaging the rails upon
which the truck operates/and having the‘rhub
portion pressed”ënlarged section Iâ) of
the shaft under 'ajh appreciable pressure such as
to form a'rigid driving connection therebetween.
To provide for driving a gear from the axle
shaft Without rigidly attaching the gear directly
to the shaft, I have disclosed a cast metal sleeve
I2 radially encircling the shaft and spaced there
from to provide annular clearance therebetween.
The sleeve I2 with the components thereof is
mounted on the shaft prior to the time that the
wheel 8 is pressed thereon.
The sleeve I2 is provided with a flanged sleeve
v `¿incliner feature of the present invention re-- 55 I3 pressed thereon having the flange portion I4
through which are extended studs I5 by which
the sleeve carries the annular ring gear I6, the
gear I6 thus being rigidly connected for conjoint
Thus, when the two halves of the member 46
are clamped together the rubber elements 48 and
49 are compressed about the external surface of
rotation with the elongated sleeve I2.
the shaft 5 and they are locked against rotation.
On one
side of the gear and sleeve assembly there is pro
vided the tapered roller bearing assembly I 1 hav
ing an oil seal I8, and spaced _from the opposite
This provides for rigid connection or support for
the end 41 of the sleeve I2 upon the axle shaft.
Since Arubber connectionsvare provided at both
end of the sleeve I3 by means of the spacer I9
ends of the sleeve I2, it is apparent that there is
is a second tapered roller bearingv assembly 26
no metallic connection of the gear I6 to the axle
having an oil seal 22.
10 shaft and that the driving connection is effected
This provides for mounting the gear and asso
through rubber elements which do not in any way
ciated sleeve I2 for free rotation Within a split
'stress the shaft or produce any changes in the
housing 23, which housing is shown more in de
loads carried thereby.
tail in Figure 4 as a cover portion 24 mated with
Due to the bearings I1 and 2B, it is apparent
the main housing portion 23 along an angularly
, that the gear I6 with the associated sleeve I2 is
extending plane, the housing 23 having a for
free to rotate conjointly with the axle 5 to pro
wardly projecting nose portion 25 provided with
vide for conjoint rotation of gear I 6 while the
suitable bearing supports for a pinionv shaft 23
housing 23 is maintained in a substantially fixed
carrying the pinion gear21 meshing with the ring
position, being movable only in accordance with
gear I6. The outer end of the pinion shaft 26 20 relative movements between the car axle and the
is connected through a suitable coupling to the
car body. Rotation of gear I6 drives pinion 21
propeller shaft 28 leading to the drive shaft of
which, through shaft 26, imparts torque to the
the generator.
generator carried by the car body. It Will be ap
Mounted over the bearing seal members I8 and
parent that because of the split design of the
22 and closing the opposite ends of the housing 25 housing 23, this housing can be removed from
23 are cap members 30 which are bolted or other
the shaft without disturbing the connections of
wise secured to the radial faces of the housing 23,
the sleeve I2 to the shaft and without requiring
and which enclose the oil seal members I8 and
removal of the wheel 8. As a result, the entire
22, These end cap members 30 are pro-vided with
mechanism is capable of ready assembly, main
oil slinger portions 32, and are closed by the end 30 tenance and repair once the sleeve I2 has been
member 33 mounted at the right-handy end of
secured in driving position.
sleeve I2 and by a flanged portion 34 at the left«
In Figure 2 I have disclosed a modified form of
hand end of the sleeve I 2. The end cap members
~ construction in which the sleeve I2’ is provided
30 may be provided with suitable shims either
with a radially enlarged axially extending por
at the face where they are bolted to the housing
tion 60 terminating in a radial ñange 62. This
23 as indicated at 35, or against the outer annular
flange is bolted to the corresponding radial flange
race of the bearing assemblies I1 and 20 as indi
63 of a cylindrical sleeve member 64 disposed in
cated at 36 in Figure 1B for purposes of adjust
radial alinement with the cylindrical sleeve por
ment of the bearings within the housing 23.
tion 65 of the member 66 bolted to the hub of the
To provide for positive connection of the sleeve 40 wheel 8. Interposed between the adjacent an
I2 carrying the ring gear I6 in driving relation
nular surface of the members 64 and 65 is the
to the axle, there is bolted to the left-hand end
cylindrical rubber disc 6B which may be vulcan
of the sleeve I2 the cylindrical flanged member
ized to the surfaces to provide for a non-metallic
31 which has the flange portion 38 rigidly secured
driving connection between the axle 5 and the
to the end of the sleeve I2 by means of studs 39.
sleeve I2'. With such a construction the oil
An annular rubber cylinder 40 is interposed be
slinger portion 32 of the end cap 30 is axially
tween the internal annular surface of the sleeve
enclosed within the disc 61 supported on the
31 and the external annular surface of the ex
sleeve I2’ adjacent the shoulder 68. In all other
tended cylindrical portion 42 of the member 43,
respects the arrangement shown in Figures 1A
which member is securely bolted to the hub of the 50 and 1B is provided in the embodiment shown in
wheel 8 as by means of the studs 44. Preferably,
Figure 2.
the rubber cylinder 40 is vulcanized to both of
In Figures 5 and 6 I have disclosed a modified
these surfaces to provide rigid connection there
means of connecting the driving sleeve I2 to the
to whereby the rubber is stressed when there is
rail wheel of the vehicle. 'I‘he Wheel 8’ in this
a torque reaction between the members 43 and
form of construction which is mounted on the
31. Thus, when the Vehicle starts and the wheel
surface I0 of-the axle 5 has the inboard side of
8 begins to rotate, a cushioned drive is provided
its hub portion turned to form a cylindrical
between the wheel 8 and the sleeve I2 through
shoulder 1D. The shoulder 'I0 which is annular
the rubber connection 46.
in form is adapted to receive the connecting
At the opposite end of the sleeve I2 ythere is
60 member or driving sleeve 12 which projects ax
provided a split clamp member 46 which is se
ially inwardly over the axle 5, and carries the
curely clamped about the end 41 of the sleeve I2,
rubber disc 40 coupled to the connecting sleeve
VVVandghas. a reduced portion indicated clearly in
31. Adjacent the wheel hub the sleeve 12 is en
Figure'3 adapted to be clamped about the axle
shaft I2.
Interposed between tlîe\reduped end of the
larged radially and provided with split clamp
65 portions engaging around the annular surface,
these split clamp portions being indicated at 13.
clamp 46 and the external surface Vof the shaft I2
The clamp portions 13 are slotted and -a suitable
there are provided two semi-cylindrical rubber`?
>stud or bolt 14 is extended therethrough and
elements 48 and ,49. Each of these elements is
serves\tortighten these clamp portions firmly
provided on its external arcuate surface with thin 70 around the annular shoulder 10. The shoulder
metal members 56 `vulcanized or otherwise se~
10 itself is provided with arcuate recess portions
cured thereto, and having outturned ends 52
15 located at diametrically opposite points and
seated in the clamping members 45 to prevent
extending parallel to each other into which the
relative rotation between the rubber elements 46
bottom portion of the bolt 14 extends. This pro-`
and the clamp members.
75 vides for non-rotatively locking the sleeve 12 to
the hub of the wheel 8', and provides a fixed
clamping engagement which eliminates the ne
cessity of tapping the holes for receiving the
studs dit as shown in Figure 1A.
With this construction, therefore, the sleeve 'l2
is non-rotatively connected in ñxed clamped en
gagement to the hub of the wheel 8', but may be
readily dismounted therefrom by removal of the
supporting means at the end of said sleeve mem
ber remote from said wheel including a non
metallic resilient support clamped around the
external surface of said axle, supporting means
yt the opposite end of said sleeve member in
cluding a non-metallic resilient connection to
said driving member, a ring gear secured about
bolts 14.
It is therefore believed apparent that I have
provided a novel type of axle generator drive
wherein there is no metallic connection between
the driving gear and the axle shaft, and also
there is no distortion of the axle shaft itself.
Consequently, the shaft maintains all of its de
sired characteristics> as an axle shaft and yet
provides for accommodating a ring gear for
driving the generator.
It is to be understood that certain details of
the present construction may be modified within
wide limits without departing from the under
lying principles thereof, and I therefore do not
intend to be limited except as defined by the
scope and spirit of the appended claims.
I claim:
1. In combination, a solid vehicle axle having
a wheel fixed thereon, an axially extending
driving member fixed to the inboard side of said
wheel and spaced radiaiiy about said axle, a
sleeve member surrounding said axle and spaced
radially therefrom, said sleeve mem-ber having a
radially enlarged end portion telescoping over
Said sleeve member, a split housing enclosing
said ring gear, bearing means on
member rotatably mounting
in said housing,
and a pinion shaft journalled in said housing and
driven from said ring gear upon rotation of said
6. In combination, in an axle drive for a gen
erator, a solid axle having a rail wheel pressed
on the end thereof, an elongated sleeve encircling
a portion of said axle and out of contact there
with, support means for the inner end of said
sleeve including a clamp member engaging about
said sleeve end and having non-metallic resil
ient ciamping engvecment about said axle, a radi.
ally enlarged axial extension on the opposite end
of said sleeve adjacent said wheel, an axially
extending driving member secured to the hub of
said wheel and telescoping into said extension, a
rubber ring vulcanized between adjacent annular
surfaces of said driving member and extension to
provide a resilient driving connection there
between, and a ring gear fixed on said sleeve.
7, In combination, a solid rail truck axle having
a Wheel pressed on one end thereof, an axially ex
said drive member, a gear secured to said sleeve
member, non-metallic resilient means com
tending driving member secured to the inboard
hub portion of the wheel and spaced radially
about said axle, a sleeve radially encircling said
pressed between said end portion and said driving
axle and carrying gear means thereon, one end
member and interconnecting said driving member
of said sleeve having a radially enlarged portion
overlying said driving member, rubber means in
and said end portion of said sleeve member for
terposed between said overlying portion and said
driving said gear, and a non-metallic resilient
driving member for transmitting torque there
support on said axle for the opposite end of said
40 between, clamp means carried by the other end
sleeve member.
of said sleeve, and rubber means encircling said
2. The combination of claim 1 including a gear
axle and clamped thereto by said clamp means
housing about said gear, bearing means on said
for resiliently supporting the opposite end of said
sleeve member rotatably mounting it in said
housing, and a pinion shaft extending out of said
8. The combination of claim '7 wherein said
housing and driven by said gear.
driving member is bolted to the inboard radial
3. The combination of claim 1 wherein said
face of the hub of said wheel.
non-metallic resilient means compri-ses a rubber
9. The combination of claim '7 wherein said en
larged end portion of said sleeve is detachable
annular surfaces of said driving member and
said enlarged end portion whereby torque im 50 therefrom.
10. The combination of claim 7 wherein said
posed therethrough stresses said rubber in shear.
rubber means is vulcanized between adjacent an
4. The combination of claim 1 wherein said
nular surfaces of said driving member and said
non-metallic resilient support includes semi
cylinder vulcanized between adjacent overlapping
cylindrical rubber sections radially clamped about
the external surface of said axle.
5. In combination, a solid axle havin-g a wheel
pressed thereon, an axially extending annular
driving member secured to the inboard side of
" said wheel, an elongated sleeve member encir
` cling said axle and radially spaced therefrom, 60
enlarged end portion, said end portion being de
tachably secured to said sleeve.
11. The combination of claim '7 wherein the
hub of said wheel has a machined annular shoul
der, and said driving member is provided withV
split clamping means secured about said shoulder.
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