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Патент USA US2406069

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Aug. 20, 1946. '
w. R. FREEMAN
- 2,406,069
‘BEARING
Filed ‘Nov. 1, 1944
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l/h/i/v‘rol?
We; TER R, measly/QM
‘BMW
Patented‘Aug. 20, 1946
UNITED:
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2,406,069
PATENT ‘ OFFICE“, . v Q
BEARING
2,406,069
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'Walter R..Freeman, St.- Louis County, Mo.‘
rAprplication ‘November 1, 1e44, Serial No. 561,397
7 Claims. (Cl. 308—184)
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the support and an internal diameter greater
than the diameter of" the shaft, l3. This-cage
is provided with‘ a plurality.ofqcircumferentially
This invention relates to bearings and more ‘
particularly to a bearing for use with a shaft
which operates in ‘a liquid containing foreign
spaced longitudinally extending slots l5‘ eX-tend- .
vmatter.
ing completely through the cage-wall. ‘Theslo‘ts
An object of the invention is to provide an
improved bearing ‘for a shaft which will be efli
cient in‘ operation and have "a, long life with
minimum shaft wear vunder conditions where
the bearing and shaft are submerged in a-vliquid
are-formedv with parallel side walls I] and these
walls are spaced apart a slightly greater‘ distance
than the radial distancebetween- the cylindrical
opening l2 and the cylindrical- surfacet; l3 when
10 the‘ axes of these two surfaces -;are;-coinciding.
containing foreign matter.
In, each slot is positioned‘ an elongated. roller
Anotherrobject is" to produce a shaft'bearing
member l8 of a diameter to engagezthe, support
whichisgso constructed. that the shaft is sup
opening surface and the shaftsurfaceand thus
ported onlyieldable rollers-which are free to roll
centralize the shaft in the opening. ‘ Thisgrdi
about their own axisiand also rotate bodilyabout
the axis of the shaft.~
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. -A still further object is to produce a shaft
ameter' permits the ‘roller members’ to ‘roll "freely
in
their‘slots.‘
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These roller- members-are constructed‘ of‘ ma,
terial to provide al‘yieldable surface, av suitable
material being rubber, a yieldable;plastic,- etc".
whenr-the‘ bearing and shaftgpare submerged in 20 If it is desired to give the rubber'greate-r stability;
fabric may be incorp-orated~therein.~ Where-the
aliquid containing an abrasivesubstance.
rolls have a, fairly large- diameter it is found
: -A-' further object is to: producev a bearing which
practical to provide the-:roller‘v members with'a
will be:- self-cleansing and‘ self-lubricating when
metal. corev in order- to~control the‘ yieldabili-ty
employed with a shaft submerged in; a liquid
25 of the roller surfaces. With'theL roller members
having abrasivematerial suspended therein.
positioned- in; the slots of thevlcagev and the~as-—
; A'morerspeci?c object is to produce ‘antim
sembly positioned :between'th'e' support and. shaft;
proved'bearing which vis especially well adapted
as» shown in the various ?gures; the shaft will
for use as. a strut. bearing; for boat propeller
bearing whichwill so operate thatgthere will be
present‘ a self-cleansing action so that no ab
rasive ,wear will occur between itgand the“ shaft
be ‘properly supported - and», yet‘lvfreelyv rotatable
shafts.
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. Other, objects, of the invention will become 30 in the support since the roller~=members~arefree
apparent from the following?deseription taken
to rotate. in their slots.
showing a preferred‘embodiment thereof.
In
theclrawing:
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Inaddition to the roller members beingnfree
to rotate about‘ their ow-n‘iaxis‘inqthe-caga-fthe
in connection with the = accompanying drawing
cage is also free to- rotate relativato- the-‘shaft
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_. Figure 1 is a longitudinal sectional view of a so a,
and the support andabout theaxis 'of the ‘shaft.
bearing associated with a shaft and constructed
Thus as theshaft rotates the: rolling-action: of
inaccordance with my invention.
the} roller members about their own~axis<will
result .in .a‘ rotation of the cage; -_-'_I!l>1e~.act_ion;-gis
Figures 2, 3, 4 and 5 are cross sectional views
the‘same was‘ a planetary. wheel arrangement
taken, respectively, onthe lines 2-—2, 3-7-3, 47-4,
and'5~—,5 of Figure 1‘ and showing details of con
struction.
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.. Referringu-tothe figures in detail, the numeral
l_~l- indicates a- support member which-has a cy
lindrical opening [2 therethrough.
Extending
through. this opening is a. shaft’ I3 which is of
somewhat smaller diameter‘ than the opening l2.
Between the shaft ‘vand‘the' support is positioned
my. improved bearing, generally indicated by the '
numeral 14-, said- bearing permitting- rotation
of, the shaft relative totheysupport and also act
ing; as a supporti_ng-_. mediumqbetween the shaft
andsupport.
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’ The bearing construction shown comprises a
cylindrical caged-Shaving: an; external. diameter
smelleetnan- the ‘diameter. efihevepenins 1.1 in
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wherein. the shaft is the- sunw-wheel, the. roller
members the planet wheels and the cylindrical
surfaceof theisupport it the. ?xed-orbitwheel.
There will be».no. slidingabetween- the surfaces of
the support and the shaft-contacted by1theroller
members, only. a. rollingaction.
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In order that the ‘cage-will be properly-pen!
tralized between .the surface of the opening [2
and‘ the- shaft 13, the-ends‘. of‘ the cage carry in
ternalrings l9 of rubber or. otheri-suitable mate--v
50 rial which“ ride on vthe shaft and-maintain- the.
cage in proper position.- The. cagezismrevented
fromv shiftingaxiallyout of the-opening- l2~.-by?
providing oneendof the =cagelwi-th-tai?ange. 2.0;
for engaging one end surface ofgther-supports H‘
55 and the other. end of. the cage . with: threads :and
‘2,406,069
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anYannular nut 2| for cooperation with the other
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claim as new and desire'to'seoure by Letters Pat
. end of the Support.
An annular locking nut 22
holds the nut 2| in desired position. The ?ange
ent of'the United States is:
20 ‘has notches 23 and nuts 2| and 22 have
and‘a surrounding support, a cage having circum
ferentially spaced elongated members, means for
securing the members from'relative movement,v
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1. In a bearing for cooperation with a shaft
’ notches 24 »(see Fig. 4) and 25 for the reception
of spanner wrenches so that the nuts can ‘be re
moved to free the cage for sliding movement
rollers having yieldable surfaces with each roller .
along the shaft and out of the support opening
)being positioned between two members and con
12. ‘ When the bearing is in proper position the
?ned thereby, said rollers being ;of adiameter
cage should have onlyv suchaslight axial move 1O greaterthan the radial thicknessof vthe'members
ment'relative to the support as to be freely ro
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and capable of contacting the shaft and support
for rolling engagement on their surfaces, ra
V dially extending slotted shoulder means carried
by one end of the elongated members and a re
tatable.
The nut 2| on its side adjacent the support is
provided with radial grooves 26 so as to permit
free ?ow of liquid from the spacebetween the 15 movable radially slotted nut carried by the other '
support and the shaft and around the rollers.
end of the elongated members.
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Fluid may enter this space from the opposite-end
'2. .In'a bearing for use between relatively iro
through the notches 23 in the ?ange. Thus when
tatable members having spaced cylindrical sur
the shaft is rotating in the direction indicated by'
faces one of which acts as a supportfor the other,
the arrow there can be a circulation of liquid 20 said members being submerged ina liquid carry
-‘ through’ the bearing. This circulation is aided by
ingvabrasive material, a cage having circumferen
a-centrifugal pumping actioncaused by the rota- ' V
.tion'of the shaft and the roller members about
their own axis and about the axis of the shaft.
tially spaced longitudinally extendinggmembers
integrally united at their ends, said‘ members ‘
being so shaped as to provide parallel sided slots
Thiscirculation of fluid through the bearing re 25 therebetween, rollers provided with 'yieldable
sults in a self-cleansing and lubricationaction
surfaces and positioned in the slots, said rollers
and is particularlyadvantageous in mai-ntaininga
being of greater diameter than the'radial thick-7
very high efficiency ‘for. the bearing when the
rbearing' is employedlwith a shaft operating in a
ness of the cage members and of a size to engage
the spaced cylindrical surfaces when thebearing
liquid, such as water, and particularly liquid 30' is in position, and means carried by the cage for
‘which’ carries foreign material of an abrasive
preventing axial shifting of the cage but permit
character such as} silt’ and sand.
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ting it to rotate relatively to the cylindrical stir-1
The bearing has been‘ found to be highly :e?i
faces, said last named‘ means ‘embodying readily
cient for use as a strut bearing for boat propeller
removable means permitting said cageand rollers.
shafts. Tests have shown that when this bear 35 to having relative bodily axial movement with;i~e-,
ing is employed there will be little or no wear'of
spect to the larger cylindrical ‘surface so ‘as to
the shaft, regardless of‘ the amount of foreign
assume a position where the'rollers can be freely
material, such as silt and‘ ‘sand, ‘in the water.
removed in 'a radial direction-7 from the slots. '_
This result is obtained primarily from the-pare
3, In a bearing for use between relatively ro-'
ticular construction of the bearing." The‘vroller 40 'tatable members having spaced cylindrical sur-i
members I t have no sliding action'on'the sup.
faces one of'which; acts asya support for the
port surface or the shaft surface. The foreign
other, ‘a’ cagerhaving circumferentially spaced
longitudinally ‘extending 'members' integrally
. 7 material is ‘merely rolled over by the yieldable
' surfacesof the roller members. There is no rub
united at their ends, said members beingjso
bing action which is the cause of shaft wear in :45 shaped as to‘ provide parallel sided'slots there'
present 'strut bearings. The centrifugal pump;
ing action resulting from the rotation of the shaft
and the'roller members of the bearing also pre-1
between, rollers provided with iyieldable surfaces
positioned in the slots, said rollers being of great- 1 ‘
'er'idiameter than the radial thickness ‘or the
‘cage members and of a size to engage the spaced
vents‘accumulation‘ of sand and silt and'insur'ej
adequate water lubrication.
50 cylindrical members‘ when the bearing" is in po
4 When the roller members deteriorate and rei
quire-replacement such can'be'very easily accome
sition, ring means carried by’each 'end of the / .
cage and engaging the inner cylindrical surface
plished'without the necessity of taking the cage
for supporting " the longitudinally extending
completely off the shaft and also removing the
members of the cage inspaced relation to the eye,
propeller. The nuts 2| and 22 are unscrewed and 55 lindrical surfaces, and means carriedbyythe cage
the cage and roller'members slid along the shaft .
l ' to theleftias viewed in Figure l) to a position
for preventing axial shifting of the cage but per
mitting it to rotate relatively to, the cylindrical
where¥the bearing‘, is removed from the support.
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surfaces.
Theroller members may now be picked out of the ‘
slots and new ones placed in the slots. The",
bearing can then be placed back inoperative‘.
;, .positiom, Since the‘ shaft does not become worn;
by the use of the bearing there is never any
necessity-for replacing the shaft, asmust be done
with the present strut bearings where an abrasive
action due to turning of the shaft in a fixed
Surface-"1.
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' vBeing aware of the possibility of modi?cations
' in, the particular bearing structure shown and‘
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> 4: A bearing for‘ use‘ between tworelative r0
tatable members having different size internal.
and external cylindrical surfaces, said bearing
comprising a cylindrical cage formed with cir
qcumferentially ‘spaced longitudinal slots, said
cage'havinga' radial thickness‘ at the‘, slots less.
65 than the radial space between the‘ cylindrical '
surfaces, rollers positioned in. the slots for rota-1 >
tion therein and havingyyieldable surfaces, said
' rollers beingof a diameter greater than the ra-'-.
dialthickness of the cage at the slots and'en-.
described, without ‘departing from the funda-i 70 gaging the cylindrical surfaces when the bear-‘
mental’ principlesof my invention, I do not in-‘
tend that the scope of said invention be limited‘
ingis in position, means at the ends of the cage‘
to centralize the cagebetween the, ‘cylindrical
in any "manner 'except'in accordance with the‘ , ' surfaces, and shoulder means on the ends of the
appended
'Havlng'fully
claims.‘v
described
'‘ a my‘ invention,
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cage for engagement’ with shoulders on one, of
75 the members and thereby limit axial movement '
2,406,069
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- of the cage with respect to the members, said
shoulder means being slotted to permit flow of
?uid through the cage and around the rollers.
5. A bearing for use between two relative ro
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material, said bearing comprising a cylindrical
cage formed with circumferentially spaced lon
gitudinal slots, rollers positioned in the slot for
engaging the cylindrical surfaces, said rollers be
tatable members having di?erent size internal
and external cylindrical surfaces, said bearing
comprising a cylindrical cage formed with cir
ing made from rubber or like yieldable material
and capable of free rotary movement about their
cumferentially spaced longitudinal slots, said
movement relative to both'cylindrical surfaces,
cage having a radial thickness at the slots less
than the radial space between the cylindrical
surfaces, rollers positioned in the slots for rota
tion therein and having yieldable surfaces, said
rollers being of a diameter greater than the ra
dial thickness of the cage at the slots and en
axes and said cage being arranged for rotary
and means on the ends of the cage including a
removable member for limiting axial movement
thereof during operation.
'7. A bearing for use between two relatively ro
tatable members having different size internal
and external surface, a cylindrical cage provid
gaging the cylindrical surfaces when the bear 15 ed with longitudinal slots having parallel sides,
rubber rollers positioned in the slots and. of a di
ing is in position, yieldable rings at the ends of
the cage to centralize the cage between the cy
lindrical surfaces, and shoulder means on the
ends of the cage for engagement with shoulders
on the member having the internal cylindrical
surface and thereby limit axial movement of the
cage with respect to the members, one of said
shoulder means being removable.
6. Abearing for use between two relative ro
tatable members having diiferent size internal 25
and external cylindrical surfaces, said members
being submerged in a liquid containing abrasive
ameter greater than the thickness of the cage
at’ the slots, said rollers being free to rotate in
the slots when engaging the cylindrical surfaces
of the relatively rotatable members, yieldable
rings on the ends of the cage for supporting the
cage in spaced relation between the cylindrical
surfaces, means providing an outwardly extend
ing shoulder on one end of the cage, and an an
nular nut on the other end of the cage.
WALTER R. FREEMAN.
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